DE202007007532U1 - Electrical circuit for light-emitting diodes - Google Patents

Abstract

electrical Circuit (10) for Light-emitting diodes (14, 18), with a first and a second light-emitting diode block (12, 16) each of light-emitting diodes (14, 18), having a first and a second access (20, 22) for a first and a second current source (24, 26) for powering the first and / or second light-emitting diode block (12, 16), and with at least one measuring resistor (28, 30) for measuring the operating current of the first and / or second Light emitting diode block (12, 16), the light emitting diode blocks (12, 16) 16) by at least one circuit bridge (32) with each other electrically connectable, wherein the connectivity of the first and second LEDs blocks (12, 16) depending from the circuit of the first and / or second current source (24, 26) to the first and / or second access (20, 22) so executable is that in case of connection both the first and the second current source (24, 26) respectively at the first and second access (20, 22) the circuit bridge (32) in an electrically opened Condition exists and that in the ...

Description

The The invention relates to an electrical circuit for light-emitting diodes, with a first and a second LED block of each interconnected Light emitting diodes, having a first and a second access for a first and a second power source for powering the first and / or second light-emitting diode block, and with at least one measuring resistor for measuring the operating current of the first and / or second light-emitting diode block, wherein the light emitting diode blocks by at least one circuit bridge to each other electrically are connectable.

At the Use of LEDs in automotive lights, it is necessary for different to be realized lighting functions, each with a different number equipped with LEDs To use printed circuit boards. Normally, a separate one for each light function designed printed circuit board needed. This is the number of during to manufacture the manufacturing process and to be handled during assembly Components correspondingly high.

Of the Invention is the object of an electrical circuit for light-emitting diodes in such a way that the number of printed circuit boards to be designed with simultaneous realization of different lighting functions preferably is low.

Around to solve this task it is provided that the connectivity of the first and second light-emitting diode blocks in dependence from the circuit of the first and / or second current source to the first and / or second access is so executable that in the case of Connection of both the first and the second power source respectively at the first and second access the circuit bridge in an electrically open Condition exists and that in case of connection one of the two first or second current sources to each one of the first two or second accesses the circuit bridge in an electrically closed state is present. That's it allows with a single circuit board, depending on the connection of the first and second power source and depending on the circuit of the circuit bridge, various To ensure lighting functions with a PCB type.

Based the attached Drawings, the invention is explained in more detail below. Showing:

1 The structure of the electrical circuit with all possible circuit variants shown schematically completely;

2 the structure after 1 in a first circuit state with different drive options for the two light-emitting diode blocks;

3 the structure after 2 in a second circuit state with the same drive options for the two light-emitting diode blocks.

1 shows an electrical circuit 10 for light-emitting diodes that have a first light-emitting diode block 12 consisting of each interconnected first light-emitting diodes 14 and a second light emitting diode block 16 with also each interconnected second LEDs 18 having. The light-emitting diode blocks 12 . 16 each have a first and second access 20 . 22 on, to the a first and second power source 24 . 26 is electrically connected. The first and second measuring resistors are used to measure the operating current 28 . 30 , A circuit bridge 32 is between the two light emitting diode blocks 12 . 16 arranged and can connect them electrically under certain conditions.

How this connection can look like is illustrated in a circuit example 2 In the present case, the first and second light-emitting diode blocks 12 . 16 each with the first and second power source 24 . 26 electrically via the first and second accesses 20 . 22 connected. The circuit bridge 32 is in this case electrically opens. The light-emitting diode blocks 12 . 16 are thus independently controllable, as would be used for example for a flashing and a brake light function in a motor vehicle.

An alternative interconnection is in 3 shown. Here is the circuit bridge 32 between the two light-emitting diode blocks 12 . 16 arranged electrically connecting. The electrical supply is only via the first power source 24 connected to the first light-emitting diode block 12 connected is. Through the circuit bridge 32 becomes the second light-emitting diode block 16 switched on, so that both circuit blocks are controlled synchronously. This circuit can be used, for example, for a brake light function in a motor vehicle.

10

electrical circuit

12

first LEDs block

14

first LEDs

16

second LEDs block

18

second LEDs

20

first Access

22

second Access

24

first power source

26

second power source

28

first measuring resistor

30

second measuring resistor

32

circuit bridge

Claims (1)

Electrical circuit ( 10 ) for light-emitting diodes ( 14 . 18 ), with a first and a second light-emitting diode block ( 12 . 16 ) of each interconnected light emitting diodes ( 14 . 18 ), with a first and a second access ( 20 . 22 ) for a first and a second power source ( 24 . 26 ) for the power supply of the first and / or second light emitting diode block ( 12 . 16 ), and with at least one measuring resistor ( 28 . 30 ) for measuring the operating current of the first and / or second light-emitting diode block ( 12 . 16 ), wherein the light emitting diode blocks ( 12 . 16 ) by at least one circuit bridge ( 32 ) are electrically connectable to each other, wherein the connectivity of the first and second light-emitting diode blocks ( 12 . 16 ) in dependence on the circuit of the first and / or second current source ( 24 . 26 ) to the first and / or second access ( 20 . 22 ) is executable such that in the case of the connection of both the first and the second power source ( 24 . 26 ) at each of the first and second accesses ( 20 . 22 ) the circuit bridge ( 32 ) is in an electrically opened state and that in the case of connection one of the two first or second current sources ( 24 . 26 ) to one of the two first or second accesses ( 20 . 22 ) the circuit bridge ( 32 ) is in an electrically closed state.