US20090316344A1 - Portable display device - Google Patents
Portable display device Download PDFInfo
- Publication number
- US20090316344A1 US20090316344A1 US12/499,837 US49983709A US2009316344A1 US 20090316344 A1 US20090316344 A1 US 20090316344A1 US 49983709 A US49983709 A US 49983709A US 2009316344 A1 US2009316344 A1 US 2009316344A1
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- United States
- Prior art keywords
- display
- display device
- elements
- joint portion
- panel housings
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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Classifications
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/16—Constructional details or arrangements
- G06F1/1601—Constructional details related to the housing of computer displays, e.g. of CRT monitors, of flat displays
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/13336—Combining plural substrates to produce large-area displays, e.g. tiled displays
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/14—Digital output to display device ; Cooperation and interconnection of the display device with other functional units
- G06F3/1423—Digital output to display device ; Cooperation and interconnection of the display device with other functional units controlling a plurality of local displays, e.g. CRT and flat panel display
- G06F3/1446—Digital output to display device ; Cooperation and interconnection of the display device with other functional units controlling a plurality of local displays, e.g. CRT and flat panel display display composed of modules, e.g. video walls
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
- G02F1/133328—Segmented frames
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133524—Light-guides, e.g. fibre-optic bundles, louvered or jalousie light-guides
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2300/00—Aspects of the constitution of display devices
- G09G2300/04—Structural and physical details of display devices
- G09G2300/0421—Structural details of the set of electrodes
- G09G2300/0426—Layout of electrodes and connections
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2310/00—Command of the display device
- G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
- G09G2310/0202—Addressing of scan or signal lines
- G09G2310/0221—Addressing of scan or signal lines with use of split matrices
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2310/00—Command of the display device
- G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
- G09G2310/0264—Details of driving circuits
- G09G2310/0278—Details of driving circuits arranged to drive both scan and data electrodes
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S345/00—Computer graphics processing and selective visual display systems
- Y10S345/905—Display device with housing structure
Definitions
- the present invention relates to a foldable type portable display device that can realize the large-sized screen with plural display elements, and more particularly to a portable display device that optical elements provided on the top surfaces of display elements, respectively are arranged coming into contact each other when the display device is unfolded, thereby minimizing a non-display area on a joint portion between the adjacent display elements.
- LCD liquid crystal display
- TFT thin film transistor
- FED field emission display
- PDP plasma display panel
- EL electro luminescent
- a foldable type display device As a portable display device with multiple display elements, a foldable type display device is suggested for increasing portable characteristics.
- a prior foldable type display device when panel housings having display elements, respectively are unfolded, there is a joint portion between the adjacent display elements.
- the display elements of the panel housings should be precisely machined to minimize the width of the joint portion and the high reliability is need in the machining.
- the present invention has been made in an effort to solve the problems described above and it is an objective of the present invention to provide a foldable display device that at least two foldable panel housing for receiving a display element may be folded or unfolded, sidewalls of an optical elements coming into contact to form a single large size screen in the unfolded position of the panel housings.
- the present invention provides a portable display device comprising;
- At least two foldable panel housings for receiving and supporting the display elements, electronic components for driving the display elements;
- optical elements provided on the top of the one of the sidewalls of the panel housings and mounted in a joint portion of the display elements
- one of the sidewalls of the panel housings forms openings or a connecting joint portion, and the sidewalls of the optical elements are adjacently disposed each other when the panel housings are unfolded.
- the display elements are disposed in contact with one of the sidewalls the panel housings, and a protecting member is provided on the optical element, and the protecting member and the optical element may be integrally formed.
- the distance between a pivot center of the panel housings and the optical element or the protecting member is within 1 mm when the panel housings are pivoted.
- sealants for sealing an upper and lower substrates of the display elements is positioned within 0.5 mm from pixels in the connecting joint portion of the display elements.
- the optical elements are provided to change the path of the display light and the angle of the changing of the path is determined by considering a non-display area and a distance between the display elements and the optical elements.
- the sidewalls of the supporting member is cut to form the openings or the connecting joint portions.
- the sidewalls of the display elements are covered only at the connecting joint portion of the display elements.
- Data signals and common signals provided to the first and second display elements are preferably divided and an outer electrode for transferring data signals and common signals are provided at the opposite side to the joint portion of the display elements.
- the present invention provides a foldable type portable display device for realizing the large-sized screen with a joint portion as a non-display area between two or more display panels is minimized.
- the non-display area as the joint portion may be compensate by means of an optical element, and the driving signals are divided and transferred to two display elements for realizing a single large-sized screen.
- FIGS. 1 and 2 are perspective views illustrating a foldable type portable display device according to the present invention
- FIGS. 3 to 5 are sectional views showing unfolded panel housings of a portable display device of the present invention.
- FIG. 6 is an perspective view showing a portable display device in a partially unfolded position
- FIGS. 7 and 8 are perspective views showing a portable display device with a joint gap between display elements according to the present invention.
- FIG. 9 is a plan view illustrating a portable display device of which the panel housings are unfolded without the optical elements
- FIGS. 10 and 11 are views illustrating an optical element
- FIG. 12 is a perspective view of a portable display device with a cover removed
- FIG. 13 is a sectional view of a portable display device with a panel housing unfolded
- FIGS. 14 to 16 are perspective views showing a supporting member for mounting a display panel assembly
- FIGS. 17 to 19 are views showing a chassis enclosing a display panel assembly
- FIGS. 20 and 21 are block diagrams of a driving circuit for driving two screens
- FIG. 22 is a view showing a display panel assembly with an outer electrode array
- FIGS. 23 and 24 are perspective views showing an outer electrode array provided at the opposite position to a joint portion of the chassis.
- FIGS. 25 and 26 are perspective views showing a supporting member mounted on a chassis.
- a foldable type portable display device realizing a large-sized screen by adjacently arranging at least two flat display elements.
- flat display elements a liquid crystal display (LCD), an electro luminescent (EL), a field emission display (FED), a plasma display panel (PDP) and an electric paper and etc., may be used.
- two flat display elements are jointed to each other for forming a large-sized screen.
- FIGS. 1 and 2 shows a foldable type portable display device according to the present invention.
- the foldable type portable display device in FIG. 1 comprises two display elements 2 and 4 and two panel housings 20 and 40 for receiving the display elements.
- optical elements 27 provided at the display housings 20 and 40 , respectively are shown.
- the panel housings 20 and 40 are provided with electronic components for driving the display device and other parts.
- the panel housings 20 and 40 are connected by a connecting member 6 such that the two panel housings can be folded or unfolded.
- a hinge is used as the connecting member 6 in this preferred embodiment.
- FIG. 2 shows the display device according to the invention in folded position.
- a cover 18 is provided at the adjacent opposite sidewalls of the panel housings 20 and 40 for protecting sidewalls of the display elements 2 and 4 or the optical elements 27 .
- FIGS. 3 to 5 are sectional views showing the unfolded panel housings.
- the optical elements 27 are provided on the top of the display elements 2 and 4 , respectively and are adjacently disposed when the panel housings 20 and 40 are unfolded.
- the optical elements 27 are disposed on the top of the sidewalls of the panel housings 20 and 40 coming into contact.
- the sidewalls of the panel housings 20 and 40 are partially cut off to form an opening 8 b so that the optical elements 27 may be more adjacently disposed each other.
- the detail shape of the openings 8 b are shown in FIG. 13 .
- the optical elements 27 may be more adjacently positioned due to the cut-off opposite sidewalls of the panel housings 20 and 40 .
- the sidewalls of the display elements 2 and 4 may be protected from the outer impact due to the arrangement of the display elements positioned in contact with the sidewalls of the panel housings 20 and 40 , and the appropriate thickness of the panel housings 20 and 40 .
- the respective panel housings 20 and 40 are provided with a electronic components 25 and 45 and a supporting member 26 and 46 for supporting the display elements 2 and 4 . Furthermore, a cap 24 is provided at the margin of the respective display elements 2 and 4 .
- the cover 18 are not shown in the drawing for the simplicity of the drawing.
- a common pivotal center A of the panel housings is positioned in the same plain as formed by the top surface of the cap 24 . That is, the pivotal center A is disposed at the same height as that of the cap.
- FIG. 4 shows another embodiment of the present invention with a protecting member 14 .
- the protecting member 14 is mounted on an uneven-layer 24 a and 20 c formed at the inner wall of the cap 24 and the panel housings 20 and 40 to cover and protect of the front corresponding to display area and sidewalls of the optical elements 27 .
- the side portions ( 14 b ) of the protecting member 14 has preferably thinner thickness than that of the front portion ( 14 a ) of the protecting member 14 , thereby minimizing a joint portion 8 as a non-display area.
- the protecting film is preferably a metal film or a synthetic resin film coated with a metal or a non-organic materials.
- the optical element 27 are provided under the protecting member 14 and the protecting member 14 may be integrated with the optical element 27 .
- the optical element 27 may be a micro-prism or a micro-lens.
- the integration with the optical element 27 and the protecting member 14 means that the micro-prism or the micro-lens is provided on the underside of the protecting member 14 .
- the protecting member has a thickness less than 1 mm, more preferably less than 0.5 mm.
- the protecting member 14 comprises the side portion 14 b for protecting the side portion of the optical element 27 and the front portion 14 a for protecting the front portion of the optical element 27 . It is preferred that the thickness of the side portion 14 b is thinner than that of the front portion 14 a to reduce the width of the non-display area, preferably less than 0.5 mm.
- the side portion 14 b may be coated with a metal or a non-organic materials to protect from the moisture transmission and to give a rigidity.
- FIG. 5 shows a display device where a connecting joint portion is provided at each of the sidewalls of the panel housings.
- the optical elements 27 are adjacently positioned and the connecting joint portions 20 a and 40 a is rested therebetween. Accordingly, the connecting joint portions 20 a and 40 a block the openings 8 b . That is, the optical elements 27 may be adjacently positioned due to the openings 8 b or the connecting joint portions 20 a and 40 a formed by cutting-off of the opposite sidewalls of the panel housings 20 and 40 .
- connecting joint portions 20 a and 40 a are thinner than other area of the panel housings 20 and 40 , more preferably less than 0.5 mm.
- the other area of panel housings 20 and 40 have a thickness less than 1.5 mm.
- FIG. 6 shows a display device with the panel housings are partially folded.
- a joint gap 8 a is formed at the joint portion 8 adjacent to the opposite sidewalls of the optical elements 27 or the display elements 2 and 4 .
- a width of the joint gap is as less as possible.
- FIGS. 7 and 8 show an embodiment in which the joint gap is narrowly formed according to the present invention.
- the panel housings 20 and 40 are folded or unfolded around the pivoting center A of the panel housings 20 and 40 . Accordingly, the less the distance between the pivotal center A and the protecting member 14 or the optical element 27 , the less the joint gap is. As shown in FIGS. 7 and 8 , the protecting member 14 or the optical element 27 is spaced at the very reduced distance from the pivotal center A. Accordingly, as shown in the drawings, the distance between the pivotal center A and the protecting member 14 or the optical element 27 is preferable within 1 mm. The protecting member 14 or the optical element 27 is almost in accord with the pivotal center A or is spaced within the distance of 0.1 mm from the pivotal center A.
- the distance mentioned above means the distance between the pivotal center A and the connecting joint portion 20 a when the connecting joint portion 20 a is formed, as shown in FIG. 7 , and means the distance between the pivotal center A and the optical element 27 when the connecting joint portion 20 a is not formed, as shown in FIG. 3 .
- FIG. 9 is a plan view showing a display device in the unfolded panel housings without the optical elements.
- the opposite sidewalls of the display elements 2 and 4 are very close to the sidewalls of the panel housings or come into contact with the sidewalls of the panel housings, thereby minimizing a width of the joint portion 8 of the display elements.
- the circle in the drawing shows the expanded joint portion 8 .
- the protecting member 14 or protecting film is provided between the display elements and the panel housings.
- Arrays of pixels 2 e and 4 e of the display elements, respectively are adjacently positioned to the joint portion 8 .
- Sealants 2 f and 4 f are provided adjacent to the pixel arrays 2 e and 4 e .
- the sealants 2 f and 4 f are preferably provided at the position within 0.5 mm from the pixels 2 e and 4 e . It is preferred that the sealants are applied within the thickness range of 0.5 mm.
- the joint portion 8 is a non-display area in the display elements 2 and 4 , as shown in FIG. 9 , the non-display area corresponds to the area of the sidewalls of the panel housings 20 and 40 , the protecting member 14 or film, and sealants 2 f and 4 f .
- the non-display area is indicated by B in the drawing and the total non-display area is two times B.
- the protecting film may be a conventional metal film or synthetic resin.
- the end portion of the optical element is preferably extended into the non-display area.
- the optical elements 27 is provided on the top of the sidewalls of the panel housings 20 and 40 to minimize the non-display area.
- FIGS. 10 and 11 show the arrangement of the optical elements.
- FIG. 10 shows an embodiment of the optical element for changing the path of the display light.
- the optical element comprises a light transmission member 27 a formed of a transparent plastic material such as polyacrylate or polyethylene terephthalate(PET), a plurality of reflection members 27 b provided in a light transmission member 27 a for changing a direction of the display light and a diffusion plate 27 c for dispersing the light.
- a light transmission member 27 a formed of a transparent plastic material such as polyacrylate or polyethylene terephthalate(PET)
- PET polyethylene terephthalate
- an inclination of the reflection member 27 b in the optical element 27 may be obtained from the following formula (I);
- A is a distance between the top surface of the optical element 27 and the display panel 2 ; and B is the width of the non-display area as shown in FIG. 9 .
- the magnification ratio is determined considering the values of A and B.
- FIG. 11 shows a distance from the display elements to the surface of the optical elements.
- the display elements includes an upper substrate 2 i and a lower substrate 2 j.
- the display light emitted toward the display elements 2 and 4 is initially transferred from an electrode assembly 2 h , the distance from the display element 2 to the surface of the optical element 27 becomes A′.
- the A in the formula (I) may be replaced by A′.
- FIG. 12 shows a display device with the cover 18 exploded.
- a recess 28 is formed at the panel housings 20 and 40 for receiving the cover 18 .
- the joint gap 8 a is existed between the optical elements 27 . However, the joint gap 8 a may be almost removed by minimizing the gap between the optical elements 27 .
- the sidewalls of the optical elements 27 are expressed in a dotted line, which means that the sidewalls of the optical elements may be exposed or not. That is, the sidewalls of the optical elements 27 may be exposed in the structure in FIG. 3 , but may be not exposed if the connecting joint portions 20 a and 40 a are formed as in FIG. 5 .
- the cover 18 is adapted to move for allowing that the optical elements 27 are adjacently disposed each other when the panel housings 20 and 40 are unfolded.
- FIG. 13 is a sectional view showing the folded panel housings.
- the cover 18 and the recess 28 are omitted in FIG. 13 for simplicity of the drawing.
- the distances L 1 and L 2 from a pivotal center A to the optical elements 27 , respectively are the same.
- the distances D 1 and D 2 from the pivotal center A to the display elements 2 and 4 , respectively are also the same.
- the optical elements 27 come into contact or, are adjacently positioned.
- the sidewalls of the optical elements 27 may be exposed through the openings 8 b , or the sidewalls of the optical elements 27 may not be exposed in the structure that the connecting joint portions 20 a and 40 a are formed at the sidewalls of the panel housings 20 and 40 .
- FIGS. 14 to 16 show a supporting member for mounting a display elements.
- a display element 2 comprises an display panel 2 a , a driving circuit board 2 b , a back light 30 and a supporting member 160 . Therefore, the respective display elements 2 and 4 in FIGS. 2 to 4 mean a supporting member 160 which is mounted with a display panel 2 a , a driving circuit board 2 b and a back light 30 . A sidewall of the supporting member 160 corresponding to the joint portion 8 of the display element 2 is cut-off, thereby minimizing the non-display area between the display elements 2 and 4 . Also, the connecting joint portions 160 e and 160 f may be formed at the supporting member 160 to minimize the non-display area. At this time, the connecting joint portions 160 e and 160 f are mounted at the joint portion 8 of the panel housings 20 and 40 so that the non-display area may be minimized.
- FIG. 15 shows the supporting member 160 of which the sidewalls are cut and opened to form the connecting joint portions 160 e and 160 f.
- FIG. 16 shows the supporting member with the connecting joint portions 160 e and 160 f formed by the thinner sidewalls thereof.
- the connecting joint portions of the supporting member are formed more thinner than other portions of the supporting member 160 , so that the connecting joint portions 160 e and 160 f preferably have thickness within 0.3 mm.
- the connecting joint portions 160 e and 160 f are indicated in a dot line in FIG. 16 to express its thinner thickness.
- the display panels 2 a and 4 a and a back light are mounted on a plate 160 a of the supporting member 160 .
- FIGS. 17 to 19 show a display element enclosed by a chassis.
- the display panel 2 a and driving circuit board 2 b and 2 c are enclosed by the chassis 16 .
- a conventional film type may be used as a driving circuit board.
- the display elements 2 and 4 in FIGS. 2 to 4 may mean a assembly of the display panel 2 a , the driving circuit board 2 b , the back light 30 and the chassis 16 for enclosing them.
- the chassis means an enclosing member of a metal material such as aluminum for enclosing a display panel and a driving circuit board.
- the driving circuit board 2 b and 2 c may be mounted on the supporting member 160 or the chassis 16 with an outer electrode 2 k of the display panel 2 a coupled thereto in a folded state.
- a size of the display element is reduced by coupling the outer electrode 2 k to the respective upper panel 2 i and lower panel 2 j of the display panel 2 a in a folded state.
- FIG. 18 is a sectional view showing the structure that the display panel 2 a , driving circuit and back light 30 are enclosed by the chassis 16 .
- a portion of the chassis 16 corresponding to the joint portion 8 covers the sidewall of the display panel 2 a only, but does not cover the upper portion of the display panel, thereby minimizing the non-display area.
- a connecting joint portion 16 a of the chassis which the respective display elements 2 and 4 come into contact thereto, covers the sidewall of the display element. Also, the connecting joint portion 16 a is designed to be thinner than other area of the chassis to minimize the non-display area.
- FIG. 19 shows a chassis having an open type connecting joint portion.
- the joint portion 8 is cut off to be opened, which the sidewalls of the display elements 2 and 4 contact thereto or closely adjacently positioned. Accordingly, as shown in FIG. 19 , the connecting joint portion 16 a is opened and the sidewalls of the display elements 2 and 4 are exposed.
- the connecting joint portion of the chassis 16 is mounted on the joint portion 8 of the panel housings 20 and 40 , thereby minimizing the non-display area.
- FIGS. 20 and 21 are block diagrams of a driving circuit for driving two screens as a single screen.
- the first and second display panels 2 a and 4 a are connected to a first and second source driving driver 2 c and 4 c , and to a first and second gate driving driver 2 b and 4 b , respectively.
- a signal output from display device is transmitted to a field programmable gate array (FPGA) 100 .
- the FPGA ( 100 ) includes a row data processing section 110 , a column data processing section 140 , a memory device 130 and a timing controller 120 . And a power supply source 200 is connected to the FPGA.
- a driving signal from the column data processing section 140 is transmitted to the source driving driver 2 c and 4 c , and a driving signal from row data processing section 110 is transmitted to the gate driving driver 2 b and 4 b .
- the respective driving drivers are connected to the display panel 2 a for displaying an image thereon.
- the timing controller 120 controls the synchronization of the signals from the source driving driver and gate driving driver.
- the signal from the source driving driver may be a data signal and the signal from the gate driving driver may be an common signal.
- the source driving driver 2 c and 4 c , and the gate driving driver 2 b and 4 b should be connected to the display panels 2 a and 4 a , respectively. And a driving signal is transmitted to the source driving driver 2 c and 4 c and the gate driving driver 2 b and 4 b , respectively.
- FIG. 20 is a block diagram showing the same signal is supplied to the first and second source driving driver 2 c and 4 c for supplying data signals to the display panels 2 a and 4 a .
- the first gate driving driver 2 b and the second gate driving driver 4 b are time-divided, and the common signal is supplied to the first gate driving driver 2 b first, and secondly the common signal is supplied to the second gate driving driver 4 b.
- the same signal is supplied to the first and second gate driving driver 2 b and 4 b , respectively for supplying common signals to the display panels 2 a and 4 a . Accordingly, the data signal is divided and the respective divided signals are supplied to the first and second source driving drivers 2 c and 4 c.
- the total data lines are 2 n for two integrated display panels.
- An image signal memoried in the memory device 130 is divided and the divided data signals of the 1st line to (n)th data line are supplied to the first source driving driver 2 c , while the divided signals of the (n+1)th line to ( 2 n )th line are supplied to the second source driving driver 4 c.
- the display panels 2 a and 4 a are driven to reproduce a single image.
- the driving methods illustrated in the block diagrams in FIGS. 20 and 21 for driving the display panels That is, it is possible to supply the time-divided data signals to the first and second source driving drives 2 c and 4 c together with supplying the time-divided common signals to the first and second gate driving drivers 2 b and 4 b .
- the gate driving driver and the source driving driver may be made in a single integrated chip. Therefore, the drawings illustrated in the present invention are example configurations of the circuit for driving two display panels in single large sized screen.
- FIG. 22 shows an outer electrode array of the display element.
- a driving drive I.C. may be coupled to the outer electrode arrays 51 , 52 and 53 of the display panels 2 a and 4 a .
- a plurality of pixels 50 are arranged in the display panel and the respective positions of the pixels are represented in the x-y coordinates.
- the outer electrodes are drawn out from the two sides of the display panel having the four sides.
- a single driving drive I.C. with a single integrated chip may be used.
- the electrode array 51 in the x axis is drawn out from one side of the display panel, while the electrode array in the y axis is divisionally drawn out from the two opposite sides of the display panels and the divisional two electrode arrays 52 and 53 are arranged in the same direction of the x axis electrode array via two coupling electrode arrays 52 a and 53 a .
- the coupling electrode arrays 52 a and 53 a are roughly shown in the drawing for the simplicity thereof.
- the outer electrode arrays are enlarged by circle C.
- the driving driver for transferring the data signal and common signal which is formed in a single integrated circuit chip, are coupled to the display panel.
- the outer electrode for transferring the data signal and common signal is disposed at the side opposite to the side where the joint portion 8 between the two display panels 2 a and 4 a is located.
- FIGS. 23 and 24 are views showing another embodiment of the display device according to the present invention, where the outer electrode is provided at the side opposite to the joint portion of the supporting member.
- FIG. 23 shows the outer electrode 2 k comprising the outer electrode arrays 51 , 52 and 53 for coupling the driving driver supplying the data signal and common signal to the display panel 2 a .
- the electrode 2 k is disposed at the opposite side to the joint portion 8 of the supporting member 160 .
- the coupling electrodes 52 a and 53 a , or the outer electrode array 51 , 52 and 53 are not disposed at the joint portion 8 of the display panel 2 a , thereby minimizing the non-display area.
- a circuit coupler 2 e is coupled to the outer electrode 2 k for transferring the signals from the driving circuit to the display panel.
- the supporting member 160 is mounted on the panel housings 20 and 40 or on the chassis 16 by the fixing plate 161 with a screw hole 161 a.
- the circuit coupler 2 e is disposed at the opposite side to the joint portion 8 to minimize the width of the joint portion 8 .
- the sidewall of the display panel 2 a is exposed at the side of the joint portion 8 of the supporting member 160 , if necessary, such exposure may be prevented or the synthetic resin may be applied at the sidewall of the display panel or back light for its protection.
- FIG. 24 shows two supporting members symmetrically assembled each other.
- the supporting members 160 with the display panels 2 a and 4 a are symmetric around the joint portion 8 .
- the outer electrodes 2 k of the display panel 2 a in the supporting member 160 are located at the opposite side to the joint portion 8 , and the display panel 2 a is coupled to the driving circuit board via the circuit couplers 2 e and 4 e.
- FIGS. 25 and 26 show the chassis wherein the supporting member is mounted thereon.
- the upper portion of the joint portion 8 in the chassis 16 is not covered, but the side is covered.
- the sidewall of the chassis around the joint portion is thinner than other area thereof. Therefore, the non-display area may be minimized.
- the sidewall of the chassis 16 around the joint portion may be opened, so that the sidewall of the display panel 2 a is exposed.
- a protecting layer of synthetic resin is applied the sidewalls of the display panels 2 a and back light.
- the outer electrode 2 k when the display panel 2 a is mounted on the chassis 16 , as shown in the drawing, the outer electrode 2 k , where the electrode arrays 51 , 52 and 53 for transferring the data signals and common signals are provided therein, is arranged at the opposite side to the joint portion 8 of the chassis 16 . However, the outer electrode 2 k is covered by an upper portion of the chassis 16 .
- the chassis 16 may be mounted on the panel housing by means of a chassis fixing plate 16 c.
- both the supporting member 160 or chassis 16 may not be used, so the supporting member 160 may become the chassis 16 .
- the supporting member and chassis are merely an protecting member which may be integrated as a module for display panel and circuit board.
- the supporting member 160 may be commonly made of plastic materials and the chassis 16 may be made of metal such as aluminium.
- the present invention provides a foldable type portable display device for realizing the large-sized screen with the joint portion as non-display area between the two or more display elements is minimized.
- the non-display area as the joint portion may be compensate by means of the optical elements, and the driving signals are divided and transferred to the two display elements for realizing a single large-sized screen.
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Abstract
The present invention is directed to a portable display device having at lease two display elements, at least two foldable panel housings for receiving and supporting the display elements circuit boards and other parts, respectively, and optical elements provided on the top surface of the one of the sidewalls of the panel housings and mounted in a joint portion of the display elements, wherein one of the sidewalls of the panel housings are cut to form openings or a connecting joint portion, and the sidewalls of the optical elements is adjacently disposed each other when the panel housings are unfolded. The portable display device allows a single large sized screen, and whereby a joint portion between the two display panels as non-display area may be minimized.
Description
- This is a continuation of application Ser. No. 11/915,392, filed Nov. 26, 2007, now pending, the entire contents of which are incorporated herein by reference.
- (a) Field of the Invention
- The present invention relates to a foldable type portable display device that can realize the large-sized screen with plural display elements, and more particularly to a portable display device that optical elements provided on the top surfaces of display elements, respectively are arranged coming into contact each other when the display device is unfolded, thereby minimizing a non-display area on a joint portion between the adjacent display elements.
- (b) Description of the Related Art
- Conventionally, a technology for realizing a large-sized screen with two or more display elements was applied in a large display device. In recent years, as the mobile information system has been developed to have a wireless internet function, a need of the large-sized screen is more increased. However, the large-sized screen cannot meet the most of portable characteristics of the portable display device and then a foldable type portable display device is suggested.
- Generally, as flat display elements used for the portable display device, a liquid crystal display (LCD), a thin film transistor (TFT)-LCD, a field emission display (FED), a plasma display panel (PDP), an electro luminescent (EL), an electronic paper and etc., have been used.
- As a portable display device with multiple display elements, a foldable type display device is suggested for increasing portable characteristics. In a prior foldable type display device, when panel housings having display elements, respectively are unfolded, there is a joint portion between the adjacent display elements. However, there are problems that the display elements of the panel housings should be precisely machined to minimize the width of the joint portion and the high reliability is need in the machining.
- The present invention has been made in an effort to solve the problems described above and it is an objective of the present invention to provide a foldable display device that at least two foldable panel housing for receiving a display element may be folded or unfolded, sidewalls of an optical elements coming into contact to form a single large size screen in the unfolded position of the panel housings.
- To achieve the above objective, the present invention provides a portable display device comprising;
- at least two display elements;
- at least two foldable panel housings for receiving and supporting the display elements, electronic components for driving the display elements; and
- optical elements provided on the top of the one of the sidewalls of the panel housings and mounted in a joint portion of the display elements;
- wherein one of the sidewalls of the panel housings forms openings or a connecting joint portion, and the sidewalls of the optical elements are adjacently disposed each other when the panel housings are unfolded.
- The display elements are disposed in contact with one of the sidewalls the panel housings, and a protecting member is provided on the optical element, and the protecting member and the optical element may be integrally formed. Preferably, the distance between a pivot center of the panel housings and the optical element or the protecting member is within 1 mm when the panel housings are pivoted. And sealants for sealing an upper and lower substrates of the display elements is positioned within 0.5 mm from pixels in the connecting joint portion of the display elements.
- The optical elements are provided to change the path of the display light and the angle of the changing of the path is determined by considering a non-display area and a distance between the display elements and the optical elements.
- When the display elements are mounted on a supporting member, it is preferred that the sidewalls of the supporting member is cut to form the openings or the connecting joint portions.
- When the display elements are mounted on a chassis, the sidewalls of the display elements are covered only at the connecting joint portion of the display elements.
- Data signals and common signals provided to the first and second display elements are preferably divided and an outer electrode for transferring data signals and common signals are provided at the opposite side to the joint portion of the display elements.
- The present invention provides a foldable type portable display device for realizing the large-sized screen with a joint portion as a non-display area between two or more display panels is minimized.
- According to the present invention, the non-display area as the joint portion may be compensate by means of an optical element, and the driving signals are divided and transferred to two display elements for realizing a single large-sized screen.
-
FIGS. 1 and 2 are perspective views illustrating a foldable type portable display device according to the present invention; -
FIGS. 3 to 5 are sectional views showing unfolded panel housings of a portable display device of the present invention; -
FIG. 6 is an perspective view showing a portable display device in a partially unfolded position; -
FIGS. 7 and 8 are perspective views showing a portable display device with a joint gap between display elements according to the present invention; -
FIG. 9 is a plan view illustrating a portable display device of which the panel housings are unfolded without the optical elements; -
FIGS. 10 and 11 are views illustrating an optical element; -
FIG. 12 is a perspective view of a portable display device with a cover removed; -
FIG. 13 is a sectional view of a portable display device with a panel housing unfolded; -
FIGS. 14 to 16 are perspective views showing a supporting member for mounting a display panel assembly; -
FIGS. 17 to 19 are views showing a chassis enclosing a display panel assembly; -
FIGS. 20 and 21 are block diagrams of a driving circuit for driving two screens; -
FIG. 22 is a view showing a display panel assembly with an outer electrode array; -
FIGS. 23 and 24 are perspective views showing an outer electrode array provided at the opposite position to a joint portion of the chassis; and -
FIGS. 25 and 26 are perspective views showing a supporting member mounted on a chassis. - Preferred embodiments of the present invention will be described more in detail hereinafter.
- According to the present invention, a foldable type portable display device realizing a large-sized screen by adjacently arranging at least two flat display elements is provided. As flat display elements, a liquid crystal display (LCD), an electro luminescent (EL), a field emission display (FED), a plasma display panel (PDP) and an electric paper and etc., may be used.
- According to the present invention, two flat display elements are jointed to each other for forming a large-sized screen.
-
FIGS. 1 and 2 shows a foldable type portable display device according to the present invention. - The foldable type portable display device in
FIG. 1 comprises twodisplay elements panel housings optical elements 27 provided at thedisplay housings panel housings - The
panel housings member 6 such that the two panel housings can be folded or unfolded. A hinge is used as the connectingmember 6 in this preferred embodiment. -
FIG. 2 shows the display device according to the invention in folded position. - A
cover 18 is provided at the adjacent opposite sidewalls of thepanel housings display elements optical elements 27. -
FIGS. 3 to 5 are sectional views showing the unfolded panel housings. - As shown in
FIG. 3 , theoptical elements 27 are provided on the top of thedisplay elements panel housings - For more adjacent positioning of the
optical elements 27 upon unfolding of thepanel housings optical elements 27 are disposed on the top of the sidewalls of thepanel housings panel housings opening 8 b so that theoptical elements 27 may be more adjacently disposed each other. The detail shape of theopenings 8 b are shown inFIG. 13 . - Accordingly, when the
panel housings optical elements 27 may be more adjacently positioned due to the cut-off opposite sidewalls of thepanel housings - The sidewalls of the
display elements panel housings panel housings - The
respective panel housings electronic components member display elements cap 24 is provided at the margin of therespective display elements cover 18 are not shown in the drawing for the simplicity of the drawing. - A common pivotal center A of the panel housings is positioned in the same plain as formed by the top surface of the
cap 24. That is, the pivotal center A is disposed at the same height as that of the cap. -
FIG. 4 shows another embodiment of the present invention with a protectingmember 14. As seen in the drawing, the protectingmember 14 is mounted on an uneven-layer cap 24 and the panel housings 20 and 40 to cover and protect of the front corresponding to display area and sidewalls of theoptical elements 27. Also, the side portions (14 b) of the protectingmember 14 has preferably thinner thickness than that of the front portion (14 a) of the protectingmember 14, thereby minimizing ajoint portion 8 as a non-display area. - In the case that the side portions (14 b) of the protecting
member 14 is a film, it should be thin and strong. Accordingly, the protecting film is preferably a metal film or a synthetic resin film coated with a metal or a non-organic materials. - The
optical element 27 are provided under the protectingmember 14 and the protectingmember 14 may be integrated with theoptical element 27. Theoptical element 27 may be a micro-prism or a micro-lens. In this case, the integration with theoptical element 27 and the protectingmember 14 means that the micro-prism or the micro-lens is provided on the underside of the protectingmember 14. It is preferable that the protecting member has a thickness less than 1 mm, more preferably less than 0.5 mm. - The protecting
member 14 comprises theside portion 14 b for protecting the side portion of theoptical element 27 and thefront portion 14 a for protecting the front portion of theoptical element 27. It is preferred that the thickness of theside portion 14 b is thinner than that of thefront portion 14 a to reduce the width of the non-display area, preferably less than 0.5 mm. Theside portion 14 b may be coated with a metal or a non-organic materials to protect from the moisture transmission and to give a rigidity. -
FIG. 5 shows a display device where a connecting joint portion is provided at each of the sidewalls of the panel housings. - When the panel housings 20 and 40 are unfolded, the
optical elements 27 are adjacently positioned and the connectingjoint portions joint portions openings 8 b. That is, theoptical elements 27 may be adjacently positioned due to theopenings 8 b or the connectingjoint portions - It is preferable that the connecting
joint portions - And, the other area of
panel housings -
FIG. 6 shows a display device with the panel housings are partially folded. - As shown in
FIG. 6 , when the panel housings are partially folded, ajoint gap 8 a is formed at thejoint portion 8 adjacent to the opposite sidewalls of theoptical elements 27 or thedisplay elements joint gap 8 a becomes a drawback in the display device, it is preferable that a width of the joint gap is as less as possible. -
FIGS. 7 and 8 show an embodiment in which the joint gap is narrowly formed according to the present invention. - As shown in
FIGS. 3 and 4 , the panel housings 20 and 40 are folded or unfolded around the pivoting center A of the panel housings 20 and 40. Accordingly, the less the distance between the pivotal center A and the protectingmember 14 or theoptical element 27, the less the joint gap is. As shown inFIGS. 7 and 8 , the protectingmember 14 or theoptical element 27 is spaced at the very reduced distance from the pivotal center A. Accordingly, as shown in the drawings, the distance between the pivotal center A and the protectingmember 14 or theoptical element 27 is preferable within 1 mm. The protectingmember 14 or theoptical element 27 is almost in accord with the pivotal center A or is spaced within the distance of 0.1 mm from the pivotal center A. - The distance mentioned above means the distance between the pivotal center A and the connecting
joint portion 20 a when the connectingjoint portion 20 a is formed, as shown inFIG. 7 , and means the distance between the pivotal center A and theoptical element 27 when the connectingjoint portion 20 a is not formed, as shown inFIG. 3 . -
FIG. 9 is a plan view showing a display device in the unfolded panel housings without the optical elements. - In the drawing, the opposite sidewalls of the
display elements joint portion 8 of the display elements. - The circle in the drawing shows the expanded
joint portion 8. The protectingmember 14 or protecting film is provided between the display elements and the panel housings. Arrays ofpixels joint portion 8.Sealants pixel arrays sealants pixels - As the
joint portion 8 is a non-display area in thedisplay elements FIG. 9 , the non-display area corresponds to the area of the sidewalls of the panel housings 20 and 40, the protectingmember 14 or film, andsealants - To minimize the non-display area, the end portion of the optical element is preferably extended into the non-display area. The
optical elements 27 is provided on the top of the sidewalls of the panel housings 20 and 40 to minimize the non-display area. -
FIGS. 10 and 11 show the arrangement of the optical elements. -
FIG. 10 shows an embodiment of the optical element for changing the path of the display light. The optical element comprises alight transmission member 27 a formed of a transparent plastic material such as polyacrylate or polyethylene terephthalate(PET), a plurality ofreflection members 27 b provided in alight transmission member 27 a for changing a direction of the display light and adiffusion plate 27 c for dispersing the light. - As shown in the drawings, an inclination of the
reflection member 27 b in theoptical element 27 may be obtained from the following formula (I); -
tan α=A/B - wherein A is a distance between the top surface of the
optical element 27 and thedisplay panel 2; and B is the width of the non-display area as shown inFIG. 9 . - Also, in case that the
optical element 27 is provided with a micro-lens for magnification, the magnification ratio is determined considering the values of A and B. -
FIG. 11 shows a distance from the display elements to the surface of the optical elements. - The display elements includes an
upper substrate 2 i and alower substrate 2 j. - As shown in the drawing, the display light emitted toward the
display elements electrode assembly 2 h, the distance from thedisplay element 2 to the surface of theoptical element 27 becomes A′. Thus, the A in the formula (I) may be replaced by A′. -
FIG. 12 shows a display device with thecover 18 exploded. - A
recess 28 is formed at the panel housings 20 and 40 for receiving thecover 18. Thejoint gap 8 a is existed between theoptical elements 27. However, thejoint gap 8 a may be almost removed by minimizing the gap between theoptical elements 27. - In
FIG. 12 , the sidewalls of theoptical elements 27 are expressed in a dotted line, which means that the sidewalls of the optical elements may be exposed or not. That is, the sidewalls of theoptical elements 27 may be exposed in the structure inFIG. 3 , but may be not exposed if the connectingjoint portions FIG. 5 . Thecover 18 is adapted to move for allowing that theoptical elements 27 are adjacently disposed each other when the panel housings 20 and 40 are unfolded. -
FIG. 13 is a sectional view showing the folded panel housings. - The
cover 18 and therecess 28 are omitted inFIG. 13 for simplicity of the drawing. InFIG. 13 , the distances L1 and L2 from a pivotal center A to theoptical elements 27, respectively are the same. The distances D1 and D2 from the pivotal center A to thedisplay elements - Accordingly, when the panel housings 20 and 40 are unfolded, the
optical elements 27 come into contact or, are adjacently positioned. - The sidewalls of the
optical elements 27 may be exposed through theopenings 8 b, or the sidewalls of theoptical elements 27 may not be exposed in the structure that the connectingjoint portions -
FIGS. 14 to 16 show a supporting member for mounting a display elements. - Generally, a
display element 2 comprises andisplay panel 2 a, a drivingcircuit board 2 b, aback light 30 and a supportingmember 160. Therefore, therespective display elements FIGS. 2 to 4 mean a supportingmember 160 which is mounted with adisplay panel 2 a, a drivingcircuit board 2 b and aback light 30. A sidewall of the supportingmember 160 corresponding to thejoint portion 8 of thedisplay element 2 is cut-off, thereby minimizing the non-display area between thedisplay elements joint portions member 160 to minimize the non-display area. At this time, the connectingjoint portions joint portion 8 of the panel housings 20 and 40 so that the non-display area may be minimized. -
FIG. 15 shows the supportingmember 160 of which the sidewalls are cut and opened to form the connectingjoint portions -
FIG. 16 shows the supporting member with the connectingjoint portions member 160, so that the connectingjoint portions joint portions FIG. 16 to express its thinner thickness. - The
display panels plate 160 a of the supportingmember 160. -
FIGS. 17 to 19 show a display element enclosed by a chassis. - As shown in drawings, the
display panel 2 a and drivingcircuit board chassis 16. A conventional film type may be used as a driving circuit board. Thedisplay elements FIGS. 2 to 4 may mean a assembly of thedisplay panel 2 a, the drivingcircuit board 2 b, theback light 30 and thechassis 16 for enclosing them. - The chassis means an enclosing member of a metal material such as aluminum for enclosing a display panel and a driving circuit board. At this time, the driving
circuit board member 160 or thechassis 16 with an outer electrode 2 k of thedisplay panel 2 a coupled thereto in a folded state. A size of the display element is reduced by coupling the outer electrode 2 k to the respectiveupper panel 2 i andlower panel 2 j of thedisplay panel 2 a in a folded state. -
FIG. 18 is a sectional view showing the structure that thedisplay panel 2 a, driving circuit and back light 30 are enclosed by thechassis 16. A portion of thechassis 16 corresponding to thejoint portion 8 covers the sidewall of thedisplay panel 2 a only, but does not cover the upper portion of the display panel, thereby minimizing the non-display area. - That is, a connecting
joint portion 16 a of the chassis, which therespective display elements joint portion 16 a is designed to be thinner than other area of the chassis to minimize the non-display area. -
FIG. 19 shows a chassis having an open type connecting joint portion. - The
joint portion 8 is cut off to be opened, which the sidewalls of thedisplay elements FIG. 19 , the connectingjoint portion 16 a is opened and the sidewalls of thedisplay elements - Also, the connecting joint portion of the
chassis 16 is mounted on thejoint portion 8 of the panel housings 20 and 40, thereby minimizing the non-display area. -
FIGS. 20 and 21 are block diagrams of a driving circuit for driving two screens as a single screen. - The first and
second display panels source driving driver gate driving driver - A signal output from display device is transmitted to a field programmable gate array (FPGA) 100. The FPGA (100) includes a row
data processing section 110, a columndata processing section 140, amemory device 130 and atiming controller 120. And apower supply source 200 is connected to the FPGA. - A driving signal from the column
data processing section 140 is transmitted to thesource driving driver data processing section 110 is transmitted to thegate driving driver display panel 2 a for displaying an image thereon. Thetiming controller 120 controls the synchronization of the signals from the source driving driver and gate driving driver. - The signal from the source driving driver may be a data signal and the signal from the gate driving driver may be an common signal.
- As shown in
FIGS. 20 and 21 , to drive the twodisplay panels source driving driver gate driving driver display panels source driving driver gate driving driver -
FIG. 20 is a block diagram showing the same signal is supplied to the first and secondsource driving driver display panels gate driving driver 2 b and the secondgate driving driver 4 b are time-divided, and the common signal is supplied to the firstgate driving driver 2 b first, and secondly the common signal is supplied to the secondgate driving driver 4 b. - On the other hand, in the block diagram in
FIG. 21 , the same signal is supplied to the first and secondgate driving driver display panels source driving drivers - For example, when the respective first and
second display panels memory device 130 is divided and the divided data signals of the 1st line to (n)th data line are supplied to the firstsource driving driver 2 c, while the divided signals of the (n+1)th line to (2 n)th line are supplied to the secondsource driving driver 4 c. - Accordingly, when the driving signals is supplied to the
respective display panels display panels - Furthermore, it is possible to combine the driving methods illustrated in the block diagrams in
FIGS. 20 and 21 for driving the display panels. That is, it is possible to supply the time-divided data signals to the first and secondsource driving drives gate driving drivers -
FIG. 22 shows an outer electrode array of the display element. - Typically, a driving drive I.C. may be coupled to the
outer electrode arrays display panels pixels 50 are arranged in the display panel and the respective positions of the pixels are represented in the x-y coordinates. For driving the pixels, the outer electrodes are drawn out from the two sides of the display panel having the four sides. However, for the production of on a large scale and a competitive price, a single driving drive I.C. with a single integrated chip may be used. - As shown in
FIG. 22 , theelectrode array 51 in the x axis is drawn out from one side of the display panel, while the electrode array in the y axis is divisionally drawn out from the two opposite sides of the display panels and the divisional twoelectrode arrays coupling electrode arrays coupling electrode arrays - As the outer electrode is arranged at one side of the
display panel - In this case, it is preferred that the outer electrode for transferring the data signal and common signal is disposed at the side opposite to the side where the
joint portion 8 between the twodisplay panels -
FIGS. 23 and 24 are views showing another embodiment of the display device according to the present invention, where the outer electrode is provided at the side opposite to the joint portion of the supporting member. -
FIG. 23 shows the outer electrode 2 k comprising theouter electrode arrays display panel 2 a. The electrode 2 k is disposed at the opposite side to thejoint portion 8 of the supportingmember 160. Thecoupling electrodes outer electrode array joint portion 8 of thedisplay panel 2 a, thereby minimizing the non-display area. - A
circuit coupler 2 e is coupled to the outer electrode 2 k for transferring the signals from the driving circuit to the display panel. The supportingmember 160 is mounted on the panel housings 20 and 40 or on thechassis 16 by the fixingplate 161 with ascrew hole 161 a. - The
circuit coupler 2 e is disposed at the opposite side to thejoint portion 8 to minimize the width of thejoint portion 8. - Although, the sidewall of the
display panel 2 a is exposed at the side of thejoint portion 8 of the supportingmember 160, if necessary, such exposure may be prevented or the synthetic resin may be applied at the sidewall of the display panel or back light for its protection. -
FIG. 24 shows two supporting members symmetrically assembled each other. When the panel housings 20 and 40 are unfolded, the supportingmembers 160 with thedisplay panels joint portion 8. - As shown in the drawing, the outer electrodes 2 k of the
display panel 2 a in the supportingmember 160 are located at the opposite side to thejoint portion 8, and thedisplay panel 2 a is coupled to the driving circuit board via thecircuit couplers -
FIGS. 25 and 26 show the chassis wherein the supporting member is mounted thereon. - As shown in the drawings, the upper portion of the
joint portion 8 in thechassis 16 is not covered, but the side is covered. The sidewall of the chassis around the joint portion is thinner than other area thereof. Therefore, the non-display area may be minimized. - Also, as shown in
FIG. 26 , the sidewall of thechassis 16 around the joint portion may be opened, so that the sidewall of thedisplay panel 2 a is exposed. In this case, a protecting layer of synthetic resin is applied the sidewalls of thedisplay panels 2 a and back light. - Furthermore, when the
display panel 2 a is mounted on thechassis 16, as shown in the drawing, the outer electrode 2 k, where theelectrode arrays joint portion 8 of thechassis 16. However, the outer electrode 2 k is covered by an upper portion of thechassis 16. - The
chassis 16 may be mounted on the panel housing by means of achassis fixing plate 16 c. - When the connecting joint portion of the supporting
member 160 orchassis 16 are assembled in the openings or the connecting joint portion of thepanel housing joint portions opening 8 b of thepanel housing - When the
display panels member 160 orchassis 16 may not be used, so the supportingmember 160 may become thechassis 16. - That is, the supporting member and chassis are merely an protecting member which may be integrated as a module for display panel and circuit board. The supporting
member 160 may be commonly made of plastic materials and thechassis 16 may be made of metal such as aluminium. - As described above, the present invention provides a foldable type portable display device for realizing the large-sized screen with the joint portion as non-display area between the two or more display elements is minimized.
- According to the present invention, the non-display area as the joint portion may be compensate by means of the optical elements, and the driving signals are divided and transferred to the two display elements for realizing a single large-sized screen.
Claims (13)
1. A portable display device comprising:
at lease two display elements; and
at least two foldable panel housings, each of the two foldable panel housings receives and supports the display element and electronic components;
wherein the adjacent display elements are adjacently disposed each other at a joint portion and form a large-sized screen when the two foldable panel housings are unfolded and at least some parts of the joint portion are a non-display area and the width of the non-display is equal or less than 5 mm.
2. The portable display device of claim 1 , wherein the joint portion is the sidewalls of the panel housings.
3. The portable display device of claim 1 , further comprising the protecting members for protecting the front and the side of the display elements and the thickness of side portions of the protecting members is thinner than that of front portions of the protecting members.
4. The portable display device of claim 3 , wherein the side portion of the protecting members is coated with a metal or a non-organic materials.
5. The portable display device of claim 1 , wherein the sidewalls of the panel housings are disposed between the adjacent display elements.
6. The portable display device of claim 1 , further comprising an optical elements on each of the display elements and the adjacent optical elements are also moves closer to each other when the two foldable panel housings are unfolded.
7. The portable display device of claim 1 , the width of the non-display area of each display element is equal or less than 1 mm.
8. The portable display device of claim 1 , wherein the display elements have a sealant at the joint portion and the thickness of the sealant is less than 0.5 mm.
9. The portable display device of claim 7 , wherein each of the display elements has a pixels and the distance between the pixels and the sealant at the joint portion is less than 0.5 mm.
10. The portable display device of claim 1 , wherein the display elements have an outer electrodes for receiving common signal and data signal and the outer electrodes are disposed on one side of the display elements.
11. The portable display device of claim 10 , wherein the outer electrodes are disposed at the opposite side of the side formed joint portions.
12. The portable display device of claim 1 , further comprising the protecting members for protecting the display elements and the protecting members are disposed between the adjacent display elements.
13. The portable display device of claim 12 , wherein the protecting members are mounted on the panel housings.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/499,837 US20090316344A1 (en) | 2005-06-01 | 2009-07-09 | Portable display device |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KRPCT/KR05/01634 | 2005-06-01 | ||
PCT/KR2005/001634 WO2006129892A1 (en) | 2005-06-01 | 2005-06-01 | Portable display device |
US91539207A | 2007-11-26 | 2007-11-26 | |
US12/499,837 US20090316344A1 (en) | 2005-06-01 | 2009-07-09 | Portable display device |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US91539207A Continuation | 2005-06-01 | 2007-11-26 |
Publications (1)
Publication Number | Publication Date |
---|---|
US20090316344A1 true US20090316344A1 (en) | 2009-12-24 |
Family
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Family Applications (3)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/915,392 Expired - Fee Related US7570483B2 (en) | 2005-06-01 | 2005-06-01 | Portable display device |
US12/498,656 Active US8213167B2 (en) | 2005-06-01 | 2009-07-07 | Portable display device |
US12/499,837 Abandoned US20090316344A1 (en) | 2005-06-01 | 2009-07-09 | Portable display device |
Family Applications Before (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/915,392 Expired - Fee Related US7570483B2 (en) | 2005-06-01 | 2005-06-01 | Portable display device |
US12/498,656 Active US8213167B2 (en) | 2005-06-01 | 2009-07-07 | Portable display device |
Country Status (5)
Country | Link |
---|---|
US (3) | US7570483B2 (en) |
EP (1) | EP1891498A4 (en) |
JP (1) | JP2008542836A (en) |
CN (1) | CN101194218A (en) |
WO (1) | WO2006129892A1 (en) |
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US9933644B2 (en) | 2014-06-19 | 2018-04-03 | Samsung Display Co., Ltd. | Display module and multi-display device having the same |
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CN105259976A (en) * | 2009-01-19 | 2016-01-20 | 金时焕 | Portable display device |
US7864517B2 (en) * | 2009-03-30 | 2011-01-04 | Microsoft Corporation | Mobile computer device binding feedback |
KR20110038560A (en) * | 2009-10-08 | 2011-04-14 | 김시환 | A portable display device |
WO2011059301A2 (en) * | 2009-11-16 | 2011-05-19 | Kim Si-Han | Portable display apparatus |
US9041620B2 (en) * | 2010-04-23 | 2015-05-26 | Sharp Kabushiki Kaisha | Display device, display system, display control method for same, electronic device, program, computer-readable recording medium, and light guide element |
KR101799520B1 (en) * | 2011-02-01 | 2017-11-21 | 삼성전자 주식회사 | Folderble display apparatus |
JP2012185797A (en) * | 2011-02-15 | 2012-09-27 | Toshiba Corp | Electronic equipment |
TWI449991B (en) * | 2011-03-21 | 2014-08-21 | Wistron Corp | Display and an electronic device having the same |
TWI416444B (en) | 2011-03-21 | 2013-11-21 | Wistron Corp | Display |
US20130076654A1 (en) * | 2011-09-27 | 2013-03-28 | Imerj LLC | Handset states and state diagrams: open, closed transitional and easel |
JP5148767B1 (en) * | 2012-04-05 | 2013-02-20 | ナガシマ工芸株式会社 | Display device |
CN102621722A (en) * | 2012-04-11 | 2012-08-01 | 深圳市华星光电技术有限公司 | Framework for liquid crystal display device and liquid crystal display device adopting the same |
US8848351B2 (en) | 2012-04-11 | 2014-09-30 | Shenzhen China Star Optoelectronics Technology Co., Ltd. | Frame for LCD device and LCD device |
CN102681254B (en) * | 2012-04-28 | 2015-05-27 | 深圳市华星光电技术有限公司 | Liquid crystal display and display back frame |
KR101940104B1 (en) * | 2012-08-24 | 2019-01-21 | 삼성디스플레이 주식회사 | Flexible display device having slap portion |
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KR20240014622A (en) * | 2013-04-24 | 2024-02-01 | 가부시키가이샤 한도오따이 에네루기 켄큐쇼 | Display device |
US9274506B2 (en) * | 2014-01-29 | 2016-03-01 | Cheng Uei Precision Industry Co., Ltd. | Wearable electronic device |
KR102612798B1 (en) * | 2015-09-08 | 2023-12-11 | 가부시키가이샤 한도오따이 에네루기 켄큐쇼 | Display devices and electronic devices |
CN105118390B (en) | 2015-09-30 | 2017-08-01 | 京东方科技集团股份有限公司 | Back board structure and display device |
US10664014B2 (en) * | 2017-01-05 | 2020-05-26 | Wuhan China Star Optoelectronics Technology Co., Ltd | Flexible display panel and flexible display apparatus |
KR102395107B1 (en) * | 2017-08-25 | 2022-05-06 | 삼성디스플레이 주식회사 | Stretchable display device comprising optical module and using method thereof |
KR102402183B1 (en) * | 2017-09-29 | 2022-05-27 | 엘지디스플레이 주식회사 | Foldable Display Device |
KR102465746B1 (en) * | 2018-07-03 | 2022-11-09 | 엘지디스플레이 주식회사 | Display device and multi-panel display device |
KR102006300B1 (en) * | 2018-12-02 | 2019-08-01 | 주식회사 가난한동지들 | Protection Case for Foldable Display Device |
US11277929B2 (en) * | 2019-11-19 | 2022-03-15 | Intel Corporation | Personal computing device covers having stands |
CN111951697B (en) * | 2020-08-10 | 2022-02-01 | Tcl华星光电技术有限公司 | Spliced display screen |
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2005
- 2005-06-01 US US11/915,392 patent/US7570483B2/en not_active Expired - Fee Related
- 2005-06-01 CN CNA2005800499979A patent/CN101194218A/en active Pending
- 2005-06-01 EP EP05750760A patent/EP1891498A4/en not_active Withdrawn
- 2005-06-01 JP JP2008514534A patent/JP2008542836A/en active Pending
- 2005-06-01 WO PCT/KR2005/001634 patent/WO2006129892A1/en active Application Filing
-
2009
- 2009-07-07 US US12/498,656 patent/US8213167B2/en active Active
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Also Published As
Publication number | Publication date |
---|---|
US7570483B2 (en) | 2009-08-04 |
JP2008542836A (en) | 2008-11-27 |
US8213167B2 (en) | 2012-07-03 |
EP1891498A1 (en) | 2008-02-27 |
EP1891498A4 (en) | 2009-09-23 |
CN101194218A (en) | 2008-06-04 |
US20080192416A1 (en) | 2008-08-14 |
US20100053858A1 (en) | 2010-03-04 |
WO2006129892A1 (en) | 2006-12-07 |
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Legal Events
Date | Code | Title | Description |
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STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |