ACTUATING DEVICE FOR OPERATING LAMPS

• US 20110116260A1
• Filed: 11/16/2010
• Published: 05/19/2011
• Est. Priority Date: 11/18/2009
• Status: Active Grant

• Current Assignee: Dragerwerk AG & Company KGaA (FPS Vermögensverwaltung GmbH)
• Original Assignee: Drager Medical AG & Co KG (Dragerwerk AG)
• Inventors: KRETSCHMANN, Hanno
• Granted Patent: US 8,408,735 B2
• Time in Patent Office: Days
• US Class Current: 362/231
• CPC Class Codes: F21W 2131/205 for operating theatres
• CPC Class Codes: F21Y 2105/10 comprising a two-dimensional array of point-like light-generating elements
• CPC Class Codes: F21Y 2105/12 characterised by the geometrical disposition of the light-generating elements, e.g. arranging light-generating elements in differing patterns or densities
• CPC Class Codes: F21Y 2113/13 comprising an assembly of point-like light sources
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: H05B 45/20 Controlling the colour of the light

Abstract

An actuating device for operating lamps (1) includes an actuator provided for actuating a number of first light-emitting diodes (6) for generating white light, on the one hand, and a number of second light-emitting diodes (7) for generating single-color light, on the other hand. A control is provided such that only the first light-emitting diodes (6) are switched on in a first operating state of the operating lamp (1) and such that the first light-emitting diodes (6) and the second light-emitting diodes (7) are switched on in a second operating state. The second light-emitting diodes (7) are designed such that a preset color rendering index is greater in the second operating state than in the first operating state of the operating lamp (1).

Claims

1. An actuating device for operating lamps, the device comprising:

light emitting diodes including actuatable first light-emitting diodes and actuatable second light-emitting diodes;

an actuator for actuating the first light-emitting diodes for generating white light, and also for actuating the second light-emitting diodes for generating single-color light such that only the first light-emitting diodes are switched on in a first operating state of the operating lamp and that the first light-emitting diodes and the second light-emitting diodes are switched on in a second operating state wherein the second light-emitting diodes are designed such that a preset color rendering index is greater in the second operating state than in the first operating state of the operating lamp.

2. An actuating device in accordance with claim 1, wherein the certain color rendering index is the R9 index.

3. An actuating device in accordance with claim 2, wherein the second light-emitting diodes are chosen to have a color rendering index R9 in the second operating state that is greater than 70.

4. An actuating device in accordance with claim 2, wherein the second light-emitting diodes comprise red light-emitting diodes for generating a red light, such that the color rendering index R9 in the second operating state is greater than 90.

5. An actuating device in accordance with claim 2, wherein the second light-emitting diodes comprise blue light-emitting diodes for generating a blue light, such that the color rendering index R9 in the second operating state is greater than 70.

6. An actuating device in accordance with claim 1, wherein the first light-emitting diodes and the second light-emitting diodes are chosen to have a general color rendering index Ra and/or another color rendering index greater than 90.

7. An operating lamp comprising:

light emitting diodes comprising an actuatable first set of light-emitting diodes for generating white light and an actuatable second set of light-emitting diodes for generating single-color light;

a light module accommodating the first set of light-emitting diodes and the second set of light-emitting diodes;

an actuator means for actuating the first set of light-emitting diodes, and also for actuating the second set of light-emitting diodes such that only the first light-emitting diodes are switched on in a first operating state of the operating lamp and that the first light-emitting diodes and the second light-emitting diodes are switched on in a second operating state wherein the second light-emitting diodes are such that a preset color rendering index is greater in the second operating state than in the first operating state of the operating lamp.

8. An operating lamp in accordance with claim 7, wherein the second light-emitting diodes are distributed uniformly in the light module.

9. An operating lamp in accordance with claim 7, wherein the second light-emitting diodes are arranged distributed in the area of a circumferential edge of a light exit area.

10. An operating lamp in accordance with claim 9, wherein the second light-emitting diodes are arranged uniformly distributed in the area of the circumferential edge of the light exit area.

11. An operating lamp in accordance with claim 9, wherein the second light-emitting diodes are arranged adjacent to the outer, first light-emitting diodes in the circumferential direction of the light exit area, wherein two of the second light-emitting diodes are combined as twin light-emitting diodes in a common housing.

12. An operating lamp in accordance with claim 7, wherein the first and second light-emitting diodes are commonly combined on one or more LED chips.

13. An operating lamp in accordance with claim 7, wherein the actuator means comprises a control unit with a control selector element to set the first operating state and a control selector element to set the second operating state.

14. An operating lamp in accordance with claim 7, wherein the certain color rendering index is the R9 index.

15. An operating lamp in accordance with claim 14, wherein the second light-emitting diodes are chosen to have a color rendering index R9 in the second operating state that is greater than 70.

16. An operating lamp in accordance with claim 14, wherein the second light-emitting diodes comprise red light-emitting diodes for generating a red light, such that the color rendering index R9 in the second operating state is greater than 90.

17. An operating lamp in accordance with claim 14, wherein the second light-emitting diodes comprise blue light-emitting diodes for generating a blue light, such that the color rendering index R9 in the second operating state is greater than 70.

18. An operating lamp in accordance with claim 7, wherein the first light-emitting diodes and the second light-emitting diodes are chosen for the lamp to provide a general color rendering index Ra in the second operating state that is greater than 90.

19. An operating lamp comprising:

actuatable light emitting diodes including first light-emitting diodes for generating white light and second specific single-color light-emitting diodes;

a light module accommodating the first light-emitting diodes and the second light-emitting diodes;

an actuator for actuating the first light-emitting diodes, and also for actuating the second light-emitting diodes, the actuator for switching between a first operating state of the operating lamp with the first light-emitting diodes on and a second operating state with the first light-emitting diodes and the second light-emitting diodes on wherein the second operating state has a preset certain color rendering index that is greater than a certain color rendering index of the first operating state.

20. An operating lamp in accordance with claim 19, wherein:

the actuator means comprises a control unit with a control selector element to set the first operating state and a control selector element to set the second operating state; and

the certain color rendering index is the R9 index.