CN103268172B - Optical imaging touch screen and useful signal thereof add strong method - Google Patents
Optical imaging touch screen and useful signal thereof add strong method Download PDFInfo
- Publication number
- CN103268172B CN103268172B CN201310196862.1A CN201310196862A CN103268172B CN 103268172 B CN103268172 B CN 103268172B CN 201310196862 A CN201310196862 A CN 201310196862A CN 103268172 B CN103268172 B CN 103268172B
- Authority
- CN
- China
- Prior art keywords
- touch screen
- edge strip
- bright wisp
- optical imaging
- screen body
- 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.)
- Active
Links
Abstract
The invention provides a kind of optical imaging touch screen and useful signal adds strong method, optical imaging touch screen comprises touch screen body, camera and multiple edge strip, camera is arranged on two jiaos, one side of touch screen body, edge strip is arranged on other limit of touch screen body, and the back plate surface of touch screen body is smooth.Optical imaging touch screen of the present invention, the smooth surface of touch-screen backboard can form mirror-reflection, such camera not only can photograph the real image of edge strip but also can also photograph the virtual image of edge strip because mirror-reflection is formed, so the bright wisp width of camera shooting just considerably increases, bright wisp width is larger, then effective image scope is larger, and the useful signal obtained is stronger.
Description
Technical field
The present invention relates to optical image technology field, particularly relate to optical imaging touch screen and useful signal adds strong method.
Background technology
We know, the optical principle that existing optical imaging touch screen generally utilizes is as follows: the CCD/CMOS camera being arranged on the upper left corner, top, launch light by LED, through the reflection of surrounding reflection bar, enter in the CCD/CMOS camera in the upper left corner.In like manner, the light that the LED in the upper right corner launches imports in the CCD camera on right side.The light gathered forms a reticule in touch area, and the space between the light of multiple reflections is within 1MM.When touching a bit, left side LED is transmitted into the light that the light of this point and reflecting film reflects go back and is blocked, LED is simultaneously transmitted into the light of changing the time and is also blocked, the straight line formed between the CCD/CMOS camera at such two ends and this two light and two cameras can form again two angles, the accurate coordinate of this point is by controller typing like this, realizes touching reaction.Achieve single-point, multiple point touching.
Existing optical imaging touch screen is when reality uses, and camera can photograph the image of adularescent bright wisp, and white bright wisp region is the region at reflector layer place, i.e. effective touch area.When there being touching object to enter, the as above position lived of figure red boxes circle, the breakpoint that white bright wisp occurs, that is exactly the effect that object blocks that is touched.Bright wisp width is larger, then effective image scope is larger, and the useful signal obtained is stronger.In the practical application of existing optical imaging touch screen, the width of bright wisp depends on the developed width of reflector layer, and bright wisp width is larger, then effective image scope is larger, and the useful signal obtained is stronger.
In order to obtain the width that the common way of stronger useful signal is increase edge strip, and the width increasing edge strip will certainly increase the production cost of optical imaging touch screen.
Summary of the invention
Based on this, be necessary to adopt for general optical imaging touch screen to increase edge strip width and increase the problem that valid signal strengths can increase optical imaging touch screen production cost, provide that a kind of structure is simple, low production cost and effectively can increase the optical imaging touch screen of valid signal strengths and useful signal adds strong method.
A kind of optical imaging touch screen, comprise touch screen body, camera and multiple edge strip, described camera is arranged on two jiaos, one side of described touch screen body, and described edge strip is arranged on other limit of described touch screen body, and the back plate surface of described touch screen body is smooth surface.
Wherein in an embodiment, described edge strip is the reflective edge strip that surface is pasted with reflector layer.
Wherein in an embodiment, described edge strip is the luminous edgings that surface is provided with light emitting source.
Wherein in an embodiment, described touch screen body and described backboard are rectangle, and the quantity of described edge strip is three, and the height that described edge strip gives prominence to described touch screen body is 10 millimeters.
Wherein in an embodiment, described camera is infrared camera.
A kind of optical imaging touch screen useful signal adds strong method, and two jiaos of described touch screen body arrange camera respectively, other edge strip of described touch screen body arranges edge strip, the back plate surface of described touch screen body is smooth surface;
Described optical imaging touch screen useful signal adds strong method and comprises step:
The bright wisp virtual image that the bright wisp real image formed by the described edge strip of described camera shooting acquisition and described edge strip are formed in the back plate surface of described touch screen body;
The useful signal of optical imaging touch screen is obtained according to described bright wisp real image and the described bright wisp virtual image.
Wherein in an embodiment, the bright wisp virtual image that described step is formed in the back plate surface of described touch screen body by bright wisp real image and the described edge strip of the described edge strip formation of described camera shooting acquisition specifically comprises:
The bright wisp image of described edge strip is obtained by described camera shooting;
It is upper for defining the direction that described edge strip gives prominence to the back plate surface of described touch screen body, the first half in described bright wisp image is identified as the bright wisp real image that described edge strip is formed, described bright wisp image lower middle portion is identified as described edge strip and forms the bright wisp virtual image in the back plate surface of described touch screen body.
Wherein in an embodiment, the useful signal that described step obtains optical imaging touch screen according to described bright wisp real image and the described bright wisp virtual image specifically comprises:
Calculate the weighted mean value of the gray-scale value of described bright wisp real image respectively, and the weighted mean value of the gray-scale value of the described bright wisp virtual image;
According to the weighted mean value of the gray-scale value of described bright wisp real image, and the weighted mean value of the gray-scale value of the described bright wisp virtual image draws energy waveform figure;
The useful signal of described optical imaging touch screen is obtained by the described energy waveform figure drawn.
Wherein in an embodiment, described edge strip is the reflective edge strip that surface is pasted with reflector layer.
Wherein in an embodiment, described edge strip is the luminous edgings that surface is provided with light emitting source.
Optical imaging touch screen of the present invention, the smooth surface of touch-screen backboard can form mirror-reflection, such camera not only can photograph bright wisp real image on edge strip but also can also in the virtual image photographing the bright wisp formed due to mirror-reflection, so the bright wisp width of camera shooting just considerably increases, bright wisp width is larger, then effective image scope is larger, and the useful signal obtained is stronger.So optical imaging touch screen of the present invention to be a kind of structure simple, low production cost and effectively can increase the optical imaging touch screen of valid signal strengths.
Accompanying drawing explanation
Fig. 1 is the structural representation of optical imaging touch screen of the present invention first embodiment;
Fig. 2 is the structural representation of optical imaging touch screen of the present invention second embodiment;
Fig. 3 is the schematic flow sheet that optical imaging touch screen useful signal of the present invention adds strong method first embodiment;
Fig. 4 is the schematic flow sheet that optical imaging touch screen useful signal of the present invention adds strong method second embodiment.
Embodiment
As shown in Figure 1, a kind of optical imaging touch screen, comprise touch screen body 100, camera 200 and multiple edge strip 300, described camera 200 is arranged on two jiaos, one side of described touch screen body 100, described edge strip 300 is arranged on other limit of described touch screen body 100, and the back plate surface of described touch screen body 100 is smooth surface.
In the present embodiment, the back plate surface of touch screen body is smooth, and what can be similar to regards a smooth minute surface as, and such backboard just can reduce the scattering of light, thus can mirror-reflection be formed on the surface of backboard, edge strip is arranged on several the limits in addition of touch screen body.Edge strip is that outstanding touch screen body is arranged, and for the ease of explaining and illustrating, height edge strip being given prominence to described touch screen body is here defined as the width of edge strip.Shelter enters described optical imaging touch screen, block the light entering camera, camera can photograph the bright wisp real image having dark-coloured breakpoint formed on edge strip, simultaneously because the surface of backboard is smooth, form mirror-reflection, camera can capture the virtual image of the bright wisp appearing at dark-coloured breakpoint in backboard equally, so the bright wisp width that camera can photograph in the present embodiment increases greatly, in order to obtain optimum effect, edge strip can be vertically set on the edge strip of described touch screen body, be conducive to that camera is accurately complete photographs the bright wisp real image and the bright wisp virtual image that formed at smooth backboard that are formed at edge strip.
Optical imaging touch screen of the present invention, the smooth surface of touch-screen backboard can form mirror-reflection, such camera not only can photograph bright wisp real image on edge strip but also can also in the virtual image photographing the bright wisp formed due to mirror-reflection, so the bright wisp width of camera shooting just considerably increases, bright wisp width is larger, then effective image scope is larger, and the useful signal obtained is stronger.So optical imaging touch screen of the present invention to be a kind of structure simple, low production cost and effectively can increase the optical imaging touch screen of valid signal strengths.
In addition, optical imaging touch screen need the useful signal of some strength just can guarantee it normally works, so the width of edge strip all can have a minimum value in optical imaging touch screen.In optical imaging touch screen of the present invention, camera can photograph real image and the virtual image of bright wisp, considerably increases the bright wisp width that camera photographs, so the minimum value of edge strip width will reduce greatly required for optical imaging touch screen of the present invention.
Wherein in an embodiment, described edge strip is the reflective edge strip that surface is pasted with reflector layer.
Edge strip is pasted with reflector layer, can the direct light of reflected illumination on edge strip, and other light emitting sources need not be set in addition, be easy to realize.
Wherein in an embodiment, described edge strip is the luminous edgings that surface is provided with light emitting source.
Edge strip is provided with light emitting source from main light emission, not need to arrange other reverse light-sources again in video camera side, simplify the structure of optical imaging touch screen of the present invention.
As shown in Figure 2, wherein in an embodiment, described touch screen body 100 and described backboard are rectangle, and the quantity of described edge strip 300 is three, and the height that described edge strip 300 gives prominence to described touch screen body 100 is 10 millimeters.
In the present embodiment, touch screen body is designed to rectangle, touch screen body comprises four edges frame, be respectively the first frame 110, second frame 120, the 3rd frame 130, the 4th frame 140, edge strip has three, be respectively the first edge strip 310, second edge strip 320, the 3rd edge strip 330, first edge strip 310 is arranged on the first frame 110, the second edge strip 320 is arranged on the second frame 120, the 3rd edge strip 330 is arranged on camera 200 on the 3rd frame 330 and is arranged on the 4th frame 140 of touch screen body.Because existing touch-screen majority is rectangle, be provided with the popularization being beneficial to optical imaging touch screen of the present invention like this.The height that edge strip gives prominence to touch screen body is 10 millimeters, and the bright wisp real image width that namely edge strip is formed also is 10 millimeters.It is the value taking into account optical imaging touch screen groundwork performance and production cost acquisition that the height that edge strip is 10 millimeters is arranged, and this can also be changed according to the demand of optical imaging touch screen practical application certainly, such as 6 millimeters, 8 millimeters or 12 millimeters.
Wherein in an embodiment, described camera is infrared camera.
Infrared camera is a kind of very common camera, it has the features such as high-level efficiency, low-power consumption, long-life, choose infrared camera effectively can promote optical imaging touch screen of the present invention overall performance and serviceable life as the camera of optical imaging touch screen of the present invention in the present embodiment, in addition because infrared camera technology maturation is so also in the production cost and the maintenance difficulties that to a certain degree reduce optical imaging touch screen of the present invention.
As shown in Figure 3, a kind of optical imaging touch screen useful signal of strengthening adds strong method, two jiaos, one side of described touch screen body arranges camera respectively, other edge strip of described touch screen body arranges edge strip, the back plate surface of described touch screen body is smooth surface;
Described optical imaging touch screen useful signal adds strong method and comprises step:
S400: the bright wisp virtual image that the bright wisp real image formed by the described edge strip of described camera shooting acquisition and described edge strip are formed in the back plate surface of described touch screen body;
S500: the useful signal obtaining optical imaging touch screen according to described bright wisp real image and the described bright wisp virtual image.
Optical imaging touch screen useful signal of the present invention adds strong method, two jiaos, one side of touch screen body arranges camera respectively, other edge strip of touch screen body arranges edge strip, edge strip is the edge strip that surface is pasted with reflector layer, the back plate surface of touch screen body is that smooth surface can form mirror-reflection, camera photographs the virtual image of the bright wisp real image on edge strip and the bright wisp due to mirror-reflection formation, integrate bright wisp real image and the bright wisp virtual image, obtain broadening bright wisp image, bright wisp image after broadening according to integration obtains the optical imaging touch screen useful signal strengthened.
As shown in Figure 4, wherein in an embodiment, described step S400 specifically comprises:
S420: the bright wisp image being obtained described edge strip by described camera shooting;
S440: it is upper for defining the direction that described edge strip gives prominence to the back plate surface of described touch screen body, the first half in described bright wisp image is identified as the bright wisp real image that described edge strip is formed, described bright wisp image lower middle portion is identified as described edge strip and forms the bright wisp virtual image in the back plate surface of described touch screen body.
Illustrate for the ease of explaining, definition edge strip gives prominence to the direction of the back plate surface of touch screen body is here upper.Wherein, the first half in bright wisp image is identified as the bright wisp real image that edge strip is formed, in bright wisp image, the latter half is identified as edge strip and forms the bright wisp virtual image in the back plate surface of touch screen body, namely when the upper direction of bright wisp image be edge strip give prominence to the direction of this back plate surface of touch screen body time, bright wisp real image is upper, the bright wisp virtual image under, the size of bright wisp real image and the bright wisp virtual image is respectively the half of bright wisp image.
In the present embodiment, add the step identifying that in bright wisp image, which parts of images is bright wisp real image, which part is the bright wisp virtual image, have identified bright wisp real image and the bright wisp virtual image, just more can go out the position of touch objects in touch plane by precise positioning.
As shown in Figure 4, wherein in an embodiment, described step S500 specifically comprises:
S520: the weighted mean value calculating the gray-scale value of described bright wisp real image respectively, and the weighted mean value of the gray-scale value of the described bright wisp virtual image;
S540: according to the weighted mean value of the gray-scale value of described bright wisp real image, and the weighted mean value of the gray-scale value of the described bright wisp virtual image draws energy waveform figure;
S560: the useful signal being obtained described optical imaging touch screen by the described energy waveform figure drawn.
When processing bright wisp framing position, touch point, calculate the weighted mean value of the gray-scale value of bright wisp real image and the bright wisp virtual image respectively, draw energy waveform figure, when there being touch, the energy that touching object shelters from the region of light very littlely even will not have energy, will in energy waveform figure produce power waveform pit, the position of this energy waveform pit is exactly the angle at touching object place, according to the angle of the touch location that multiple camera photographed, touch objects can be calculated with trigonometric function and touch the two-dimensional coordinate in plane.Draw according to the weighted mean value of bright wisp real image and bright wisp virtual image gray-scale value owing to drawing energy waveform figure before, so the energy waveform figure drawn out is more accurate, the position of energy waveform endocrator and data also can be more accurate, thus more can go out the position of touch objects in touch plane by precise positioning.
Wherein in an embodiment, described edge strip is the reflective edge strip that surface is pasted with reflector layer.
The above embodiment only have expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (10)
1. an optical imaging touch screen, it is characterized in that, comprise touch screen body, camera and multiple edge strip, described camera is arranged on two jiaos, one side of described touch screen body, described edge strip is arranged on other limit of described touch screen body, the back plate surface of described touch screen body is smooth surface, and the surface of the backboard of described touch screen body can form mirror-reflection.
2. optical imaging touch screen according to claim 1, is characterized in that, described edge strip is the reflective edge strip that surface is pasted with reflector layer.
3. optical imaging touch screen according to claim 1, is characterized in that, described edge strip is the luminous edgings that surface is provided with light emitting source.
4. the optical imaging touch screen according to claim 1 or 2 or 3, is characterized in that, described touch screen body and described backboard are rectangle, and the quantity of described edge strip is three, and the height that described edge strip gives prominence to described touch screen body is 10 millimeters.
5. the optical imaging touch screen according to claim 1 or 2 or 3, is characterized in that, described camera is infrared camera.
6. an optical imaging touch screen useful signal adds strong method, it is characterized in that, two jiaos, one side of described touch screen body arranges camera respectively, other edge strip of described touch screen body arranges edge strip, the back plate surface of described touch screen body is smooth surface, and the surface of the backboard of described touch screen body can form mirror-reflection;
Described optical imaging touch screen useful signal adds strong method and comprises step:
The bright wisp virtual image that the bright wisp real image formed by the described edge strip of described camera shooting acquisition and described edge strip are formed in the back plate surface of described touch screen body;
The useful signal of optical imaging touch screen is obtained according to described bright wisp real image and the described bright wisp virtual image.
7. optical imaging touch screen useful signal according to claim 6 adds strong method, it is characterized in that, the bright wisp virtual image that described step is formed in the back plate surface of described touch screen body by bright wisp real image and the described edge strip of the described edge strip formation of described camera shooting acquisition specifically comprises:
The bright wisp image of described edge strip is obtained by described camera shooting;
It is upper for defining the direction that described edge strip gives prominence to the back plate surface of described touch screen body, the first half in described bright wisp image is identified as the bright wisp real image that described edge strip is formed, described bright wisp image lower middle portion is identified as described edge strip and forms the bright wisp virtual image in the back plate surface of described touch screen body.
8. optical imaging touch screen useful signal according to claim 7 adds strong method, it is characterized in that, the useful signal that described step obtains optical imaging touch screen according to described bright wisp real image and the described bright wisp virtual image specifically comprises:
Calculate the weighted mean value of the gray-scale value of described bright wisp real image respectively, and the weighted mean value of the gray-scale value of the described bright wisp virtual image;
According to the weighted mean value of the gray-scale value of described bright wisp real image, and the weighted mean value of the gray-scale value of the described bright wisp virtual image draws energy waveform figure;
The useful signal of described optical imaging touch screen is obtained by the described energy waveform figure drawn.
9. the optical imaging touch screen useful signal according to claim 6 or 7 or 8 adds strong method, it is characterized in that, described edge strip is the reflective edge strip that surface is pasted with reflector layer.
10. the optical imaging touch screen useful signal according to claim 6 or 7 or 8 adds strong method, it is characterized in that, described edge strip is the luminous edgings that surface is provided with light emitting source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310196862.1A CN103268172B (en) | 2013-05-23 | 2013-05-23 | Optical imaging touch screen and useful signal thereof add strong method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310196862.1A CN103268172B (en) | 2013-05-23 | 2013-05-23 | Optical imaging touch screen and useful signal thereof add strong method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103268172A CN103268172A (en) | 2013-08-28 |
| CN103268172B true CN103268172B (en) | 2015-11-18 |
Family
ID=49011807
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310196862.1A Active CN103268172B (en) | 2013-05-23 | 2013-05-23 | Optical imaging touch screen and useful signal thereof add strong method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103268172B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4811004A (en) * | 1987-05-11 | 1989-03-07 | Dale Electronics, Inc. | Touch panel system and method for using same |
| CN201145890Y (en) * | 2007-11-01 | 2008-11-05 | 复旦大学 | Infrared camera shooting orientation detection touch screen system |
| CN101847060A (en) * | 2009-03-27 | 2010-09-29 | 联想(北京)有限公司 | Optical touch system and optical touch positioning method |
| CN102646003A (en) * | 2011-02-18 | 2012-08-22 | 原相科技股份有限公司 | Sensing system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001282445A (en) * | 2000-03-31 | 2001-10-12 | Ricoh Co Ltd | Coordinate input/detecting device and information display input device |
-
2013
- 2013-05-23 CN CN201310196862.1A patent/CN103268172B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4811004A (en) * | 1987-05-11 | 1989-03-07 | Dale Electronics, Inc. | Touch panel system and method for using same |
| CN201145890Y (en) * | 2007-11-01 | 2008-11-05 | 复旦大学 | Infrared camera shooting orientation detection touch screen system |
| CN101847060A (en) * | 2009-03-27 | 2010-09-29 | 联想(北京)有限公司 | Optical touch system and optical touch positioning method |
| CN102646003A (en) * | 2011-02-18 | 2012-08-22 | 原相科技股份有限公司 | Sensing system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103268172A (en) | 2013-08-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102833487B (en) | Visual computing-based optical field imaging device and method | |
| CN101354624B (en) | Surface computing platform of four-way CCD camera collaborative work and multi-contact detection method | |
| RU2010101272A (en) | TOUCH SCREEN BASED ON COMPLETE INTERNAL DISPLAY VIOLATION | |
| CN102323868B (en) | Man-machine multipoint interaction method and device based on infrared image | |
| CN102455779B (en) | Messaging device and method | |
| CN101662581A (en) | Multifunctional certificate information collection system | |
| TW201128486A (en) | Optical touch control display apparatus and method thereof | |
| JP5852120B2 (en) | Contact positioning method and touch screen | |
| CN202889484U (en) | Camera module and electronic product with camera module | |
| US10713999B2 (en) | OLED display panel, driving method thereof and display device | |
| CN101464751B (en) | Electronic white board system based on image detection and detection method thereof | |
| CN103514437A (en) | Three-dimensional hand gesture recognition device and three-dimensional hand gesture recognition method | |
| WO2017118030A1 (en) | Optical fingerprint sensor module | |
| CN102985786A (en) | A light projector and vision system for distance determination | |
| JP2013529392A (en) | Infrared light emitting diode and touch screen | |
| CN204288121U (en) | A kind of 3D gesture recognition controller | |
| CN104298405A (en) | Touch control module, projection system and touch control method thereof | |
| CN101587404A (en) | Post-positioning device and method based on pick-up head and application thereof | |
| WO2017156975A1 (en) | Optical fingerprint sensor module | |
| CN103268172B (en) | Optical imaging touch screen and useful signal thereof add strong method | |
| CN103034846A (en) | Face indentification device for live person | |
| CN102193687A (en) | Multipoint touch screen interactive system based on LABVIEW | |
| CN202008652U (en) | Touch-control device based on infrared reflection films | |
| CN102023760B (en) | Multi-point touch sensing method and equipment | |
| WO2018006474A1 (en) | Optical fingerprint sensor module |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |