LED LIGHT

• US 20110198999A1
• Filed: 10/13/2009
• Published: 08/18/2011
• Est. Priority Date: 10/20/2008
• Status: Active Grant

• Current Assignee: Lumileds LLC (Apollo Global Management, Inc.)
• Original Assignee: Koninklijke Philips Electronics N.V. (Koninklijke Philips N.V.)
• Inventors: Honma, Shin'ichi, Schug, Josef A.
• Granted Patent: US 9,481,293 B2
• Time in Patent Office: Days
• US Class Current: 315/77
• CPC Class Codes: B60Q 1/12 due to steering position
• CPC Class Codes: B60Q 1/18 being additional front lights bracket mounted headlights B60Q1/0483
• CPC Class Codes: B60Q 2300/122 Steering angle
• CPC Class Codes: B60Q 2300/142 Turn signal actuation
• CPC Class Codes: H05B 45/10 Controlling the intensity of the light
• CPC Class Codes: H05B 45/48 having LEDs organised in strings and incorporating parallel shunting devices

Abstract

It is provided a LED light (10) for a motor vehicle, comprising several LED fields (14), wherein each LED field (14) comprises at least one LED (L1, L2, L3, L4), a housing (34) for supporting the LED fields (14) and a circuit board (12) comprising a driving electronics for operating the LED fields (14), wherein the LED fields (14) are connected in series by the driving electronics and the driving electronics is adapted to switch on and off each LED field (14) according to its position in the series in dependence of a signal, wherein the circuit board (12) is connectable to an outside of the LED light (10) located current source (16) for applying an electrical current to the LED fields (14), and wherein the circuit board (12) is integrated into the housing (34). Since complicated and/or changing switching orders of the LED fields (14) are not intended the necessary circuit board (12) for providing the corresponding driving electronics may be so small that it may be integrated into the housing (34) of the LED light (10) without significantly increasing the building space. Particularly a lot of wires between a central control unit and the different LED fields (14) are omitted as well as the central control unit itself so that the LED light (10) only requires a small building space.

Claims

1. LED light for a motor vehicle, comprising several LED fields, wherein each LED field comprises at least one LED,

a housing for supporting the LED fields and

a circuit board comprising a driving electronics for operating the LED fields,

wherein the LED fields are connected in series by the driving electronics and the driving electronics is adapted to switch on and off each LED field according to its position in the series in dependence of a signal,

wherein the circuit board is connectable to an outside of the LED light located current source for applying an electrical current to the LED fields and

wherein the circuit board is integrated into the housing.

2. LED light according to claim 1, wherein to each LED field a transistor is allocated for switching at least partially on and off the allocated LED field.

3. LED light according to claim 2, wherein each transistor is connected to the signal via a comparator, wherein each comparator is adapted to compare the signal with a different threshold, wherein the amount of the threshold corresponds to the position of the specific LED field in the series.

4. LED light according to claim 2, wherein each transistor is connected to its allocated LED field such that for at least partially switching off the allocated LED field the allocated LED field is at least partially bridged.

5. LED light according to claim 2, wherein each transistor is connected to its allocated LED field such that for switching at least partially off the allocated LED field an input of the allocated LED field is at least partially connected to ground.

6. LED light according to claim 1, wherein the driving electronics is adapted to transform the signal, which is fed into the driving electronics in the form of a PWM signal, into an analogous signal, by means of an integrator circuit.

7. LED light according to claim 1, wherein the driving electronics comprises at the maximum four connector lines for being connected to a wire leading outside the LED light.

8. LED light according to claim 1, wherein the housing is at least two-part and comprises a supporting member for receiving the LED fields and a cover for embedding the circuit board into the housing.

9. LED light according to claim 1, wherein the housing comprises a maximum area A perpendicular to a main lighting direction of the LED fields of 6 cm²≦

A≦

30 cm².

10. LED light according to claim 1, wherein the circuit board comprises the LED fields.

11. LED light according to claim 1, wherein at least one LED field comprises two or more LEDs, wherein the LEDs are connected with each other in the same manner like the LED fields.

12. Bending light for a motor vehicle comprising a LED light according to claim 1, wherein the signal corresponds to a driving situation of the motor vehicle.

13. (canceled)