Lighting device and control device for controlling a plurality of light-emitting diodes in an open-loop and/or closed-loop manner

Patent metadata

Field	Value
Publication number	US-9357606-B2
Application number	US-201214113807-A
Country	US
Kind code	B2
Filing date	Apr 16, 2012
Priority date	Apr 27, 2011
Publication date	May 31, 2016
Grant date	May 31, 2016

Abstract

The invention relates to a lighting device having at least one light-emitting diode module ( 1 ), which comprises at least two light-emitting diodes ( 11 ), which during operation emit light having colors that differ from each other, at least one driver ( 2 ), which is designed to supply the light-emitting diodes ( 11 ) of exactly one of the at least one light-emitting diode modules ( 1 ) with operating current, exactly one control device ( 3 ), which during operation controls the at least one light-emitting diode module ( 1 ) in an open-loop and/or closed-loop manner, wherein each light-emitting diode module ( 1 ) is biuniquely associated with a driver ( 2 ), and the control device ( 3 ) controls each light-emitting diode module ( 1 ) in an open-loop and/or closed-loop manner by means of the driver associated with the light-emitting diode module ( 1 ).

First claim

What is claimed is:

1. A lighting device comprising:
at least one light-emitting diode module, which comprises at least two light-emitting diodes that emit light of different colors to one another during operation;
at least one driver, which is adapted to supply the light-emitting diodes of precisely one of the at least one light-emitting diode modules with operating current; and
precisely one control device, which controls or regulates the at least one light-emitting diode module during operation,
wherein each light-emitting diode module is biuniquely assigned a driver,
wherein the control device controls or regulates each light-emitting diode module by means of the driver assigned to the light-emitting diode module,
wherein all the light-emitting diode modules exclusively comprise light-emitting diodes which emit red light during operation and light-emitting diodes which emit light from the following color locus region in the CIE standard color system: X≧0.26 and X≦0.43, Y≧0.26 and Y≦0.53 during operation, and
wherein:
the light from all the light-emitting diodes of each of the light-emitting diode modules is mixed to form white light,
the control device comprises a multiplicity of signal outputs, pulse width modulated signals, which are respectively intended for the operation of one or more light-emitting diodes, being delivered via each signal output,
the control device comprises a measurement signal input for the reception of a measurement signal which is correlated with the operating status of at least one of the light-emitting diodes,
the control device comprises at least one communication interface, via which signals are entered into the control device or delivered from the control device, and
the control device is adapted to generate the pulse width modulated signals as a function of the measurement signal and as a function of the signals entered into the control device via the communication interface.

2. The lighting device according to claim 1 , wherein at least one of the light-emitting diode modules comprises at least one light-emitting diode which emits green-white light during operation, and at least one light-emitting diode which emits red light during operation.

3. The lighting device according to claim 1 , wherein the driver is adapted to supply groups of light-emitting diodes of the assigned light-emitting diode module independently of one another with operating current.

4. The lighting device according to claim 3 , wherein light-emitting diodes of the light-emitting diode module which emit light of the same color during operation are combined to form a group.

5. The lighting device according to claim 1 , wherein the control device comprises a multiplicity of signal outputs, pulse width modulated signals which are respectively intended for the operation of one group of light-emitting diodes being delivered via each signal output.

6. The lighting device according to claim 1 , wherein the at least one light-emitting diode module comprises a sensor for determining an operating status of the light-emitting diode module, the sensor generating, during operation, a measurement signal which is correlated with the operating status of at least one light-emitting diode of the light-emitting diode module, and the control device having at least one measurement signal input for reception of the measurement signal.

7. The lighting device according to claim 1 , wherein the control device is adapted to generate the pulse width modulated signals as a function of the measurement signal.

8. The lighting device according to claim 1 , wherein the control device comprises at least one communication interface, via which signals are entered into the control device or delivered from the control device.

9. The lighting device according to claim 1 , wherein the control device is adapted to generate the pulse width modulated signals as a function of the signals entered into the control device via the communication interface.

10. The lighting device according to claim 2 , wherein the number of light-emitting diodes which emit green-white light during operation is at least 1.5 and at most 2.5 times the number of light-emitting diodes which emit red light during operation.

11. The lighting device according to claim 2 , wherein all the light-emitting diode modules exclusively comprise light-emitting diodes which emit green-white light during operation and light-emitting diodes which emit red light during operation.

12. A lighting device comprising:
at least one light-emitting diode module, which comprises at least two light-emitting diodes that emit light of different colors to one another during operation;
at least one driver, which is adapted to supply the light-emitting diodes of precisely one of the at least one light-emitting diode modules with operating current; and
precisely one control device, which controls and/or regulates the at least one light-emitting diode module during operation,
wherein each light-emitting diode module is assigned a driver,
wherein the control device controls or regulates each light-emitting diode module by means of the driver assigned to the light-emitting diode module,
wherein all the light-emitting diode modules exclusively comprise light-emitting diodes which emit green-white light during operation and light-emitting diodes which emit red light during operation, and
wherein the light-emitting diodes which emit green-white light during operation emit light from the following color locus region in the CIE standard color system: X≧0.28 and X≦0.43, Y≧0.29 and Y≦0.53.

13. The lighting device according to claim 12 , wherein the number of light-emitting diodes which emit green-white light during operation is at least 1.5 and at most 2.5 times the number of light-emitting diodes which emit red light during operation.

14. The lighting device according to claim 12 , wherein all light-emitting diode modules generate warm-white mixed light from a color locus region between 2700 K and 4000 K, wherein the light generated by the light-emitting diode modules is generated with an efficiency of more than 100 lumen/W.

Assignees

• Varga Horst
• Lyschick Sebastian
• Frahm Torben
• Osram Opto Semiconductors Gmbh

Inventors

• Varga Horst
• Lyschick Sebastian
• Frahm Torben

Classifications

• F21Y2115/10

  Light-emitting diodes [LED] · CPC title

• F21V3/00

  Globes; Bowls; Cover glasses (with refracting properties F21V5/00; with reflecting properties F21V7/00; characterised by cooling arrangements F21V29/506) · CPC title

• H05B45/46

  having LEDs disposed in parallel lines · CPC title

• F21V29/70

  characterised by passive heat-dissipating elements, e.g. heat-sinks · CPC title

• H05B45/14

  using electrical feedback from LEDs or from LED modules · CPC title