Illumination Device, Illumination Control Apparatus, Illumination System

• US 20090206758A1
• Filed: 12/20/2006
• Published: 08/20/2009
• Est. Priority Date: 12/21/2005
• Status: Abandoned Application

• Current Assignee: Excelitas Technologies Elcos GmbH (Revvity, Inc.)
• Original Assignee: Excelitas Technologies Elcos GmbH (Revvity, Inc.)
• Inventors: Kobilke, Sigmund
• Application Number:
  US12/158,161
• Publication Number:
  US 20090206758A1
• Time in Patent Office: Days
• US Class Current: 315/113
• CPC Class Codes: F21K 9/00 Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
• CPC Class Codes: F21S 10/02 changing colors F21S10/002 - F21S10/007, F21S10/04 take precedence
• CPC Class Codes: F21V 23/0442 activated by means of a sensor, e.g. motion or photodetectors
• CPC Class Codes: F21V 23/0457 the sensor sensing the operating status of the lighting device, e.g. to detect failure of a light source or to provide feedback to the device
• CPC Class Codes: F21Y 2113/17 forming a single encapsulated light source
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: H01L 25/0753 the devices being arranged next to each other
• CPC Class Codes: H01L 2924/00 Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
• CPC Class Codes: H01L 2924/0002 Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
• CPC Class Codes: H05B 45/22 using optical feedback
• CPC Class Codes: H05B 45/40 Details of LED load circuits

Abstract

An illumination device comprises on a common substrate (10) at least one LED (11) of a first color, preferably blue, at least one LED (12) of a second color, preferably red, and preferably at least one LED (13) of a third color, preferably green, and at least one white LED (14). An illumination control apparatus (8) for an illumination device (1) comprises differing controllable power sources (83) for LEDs of differing colors for producing independently controlled operation signals for said LEDs of differing colors, differing output terminals (84) for the LEDs of differing colors for supplying the independently controlled operation signals to said LEDs of differing colors, and a first control means (81) for generating operation control signals for the controllable power sources. An illumination system comprising one or more above-mentioned illumination devices and one or more above-mentioned illumination control apparatuses.

Claims

1. An illumination device (1), comprising on a common substrate (10)

at least one LED (11) of a first color, preferably blue,

at least one LED (12) of a second color, preferably red, and preferably at least one LED (13) of a third color, preferably green,

characterized in comprising

at least one white LED (14) on said common substrate.

2. The device according to claim 1, characterized in that the white LED (14) is formed by a blue or UV LED and an associated light transformation means.

3. The device according to one or more of the preceding claims, characterized in further comprising a temperature sensor (63), preferably arranged on said common substrate.

4. The device according to one or more of the preceding claims, characterized in further comprising a light intensity sensor (64), preferably arranged on said common substrate.

5. The device according to one or more of the preceding claims, characterized in further comprising a diffuser means (71) above a plurality of said LEDs.

6. The device according to claim 5, characterized in that the diffuser means is formed on a transparent cover (34) covering a plurality of LEDs.

7. The device according to claim 5 or 6, characterized in that the substrate comprises a reflective region (73).

8. The device according to one or more of the preceding claims, characterized in that LEDs of differing colors have differing anode contacts (15) and/or differing cathode contacts (16).

9. The device according to one or more of the preceding claims, characterized in that it is adapted for pulse width modulating operation, current control operation or voltage control operation.

10. The device according to one or more of the preceding claims, characterized in comprising a light converging portion (72), preferably a concave reflector, further preferably a reflecting and concave portion of the substrate and/or of an auxiliary body (33).

11. The device according to one or more of the preceding claims, characterized in comprising two or more LEDs (11, 11-2) of the same color including white.

12. The device according to one or more of the preceding claims, characterized in that two or more LEDs of the same color are arranged in a non-adjacent manner.

13. An illumination control apparatus (8) for an illumination device (1), the illumination device comprising a plurality of LEDs (11-14) of differing colors and preferably being built according to one or more of the preceding claims,

characterized in comprising

differing controllable power sources (83) for LEDs of differing colors for producing independently controlled operation signals for said LEDs of differing colors,

differing output terminals (84) for the LEDs of differing colors for supplying the independently controlled operation signals to said LEDs of differing colors, and

a first control means (81) for generating operation control signals for the controllable power sources.

14. The apparatus of claim 13, characterized in comprising an input terminal (85) for a temperature signal, wherein the first control means generates the operation control signals in accordance with the temperature signal.

15. The apparatus of claim 13, characterized in comprising an input terminal (86) for a light intensity signal, wherein the first control means generates the operation control signals in accordance with the light intensity signal.

16. The apparatus according to one or more of the claims 13 to 15, characterized in further comprising a second control means (82) for generating test control signals for the controllable power sources for generating test signals for said LEDs.

17. The apparatus according to claim 16, wherein the test control signals and test signals are generated and supplied intermittently with said operation control signals and operation signals.

18. The apparatus according to claims 15 and 17, characterized in that the second control means generates the test control signals such that the test signal for the LEDs of at least one color is reduced or switched off, wherein the first control means acquires the light intensity signal while said LED of at least one color receives the reduced or switched-off signal, and uses said acquired light intensity for generating said operation control signals.

19. The apparatus according to claim 18, characterized in that the second control means generates the test control signals such that successively the test signal for the LEDs of all colors are reduced or switched off, wherein the first control means acquires successively the respective light intensity signals, and uses said successively acquired light intensities for generating said operation control signals.

20. The apparatus according to one or more of the claims 13 to 19, characterized in comprising a control input means (87) for inputting an external illumination control quantity, wherein the first control means generates the operation control signals in accordance with the external illumination control quantity.

21. The apparatus according to one or more of the claims 13 to 20, characterized in that the control means comprises a pulse width modulation controller (88).

22. An illumination system comprising one or more illumination devices according to one or more of the claims 1 to 12 and one or more illumination control apparatuses according to one or more of the claims 13 to 21.