Solid state lighting apparatuses and related methods

Patent metadata

Field	Value
Publication number	US-9414454-B2
Application number	US-201313769277-A
Country	US
Kind code	B2
Filing date	Feb 15, 2013
Priority date	Feb 15, 2013
Publication date	Aug 9, 2016
Grant date	Aug 9, 2016

Abstract

Solid state lighting apparatuses and related methods are described. In certain embodiments, a solid state lighting apparatus adapted to operate with alternating current (AC) received from an AC power source is provided. The lighting apparatus can include a substrate and an array of solid state light emitters arranged on or supported by the substrate. Multiple solid state light emitter sets of the array can be arranged to be activated and/or deactivated at different times relative to one another during a portion of an AC cycle. The lighting apparatus can also include at least one reflective structure arranged between one or more solid state light emitters and at least one driver circuit component, to reduce or eliminate absorption by the driver circuit component(s) of light generated by the solid state light emitter(s).

First claim

What is claimed is:

1. A solid state lighting apparatus adapted to operate with alternating current (AC) received from an AC power source, the lighting apparatus comprising:
a substrate;
an array of solid state light emitters arranged on or supported by he substrate, the array of solid state light emitters comprising a plurality of electrically mutually exclusive solid state light emitter sets each comprising multiple solid state light emitters, wherein at least two different solid state light emitter sets of the plurality of electrically mutually exclusive solid state light emitter sets are arranged to be activated and/or deactivated at different times relative to one another during at least a positive portion of an AC cycle;
at least one driver circuit component arranged on or over the substrate and arranged to drive the array of solid state light emitters; and
at least one reflective structure positioned between one or more solid state light emitters of the array of solid state light emitters and the at least one driver circuit component and arranged to reduce or eliminate absorption by the at least one driver circuit component of light generated by the one or more solid state light emitters, wherein the at least one reflective structure comprises at least one of the following features (a) or (b): (a) the at least one reflective structure is arranged over and in contact with at least a portion of the at least one driver circuit component, or (b) the at least one reflective structure comprises at least one raised element that is adhered to or deposited on a first face of the substrate and has a height exceeding a height of at least one solid state light emitter of the array of solid state light emitters;
wherein the lighting apparatus is devoid of any switched-mode power supply providing AC to DC conversion utility and is arranged in electrical communication between the AC power source and the array of solid state light emitters.

2. The lighting apparatus according to claim 1 , wherein the substrate comprises a plurality of electrically conductive traces along at least one face of the substrate.

3. The lighting apparatus according to claim 1 , wherein the at least one reflective structure comprises at least one raised element that is adhered to or deposited on a first face of the substrate and has a height exceeding a height of at least one solid state light emitter of the array of solid state light emitters.

4. The lighting apparatus according to claim 1 , wherein the at east one reflective structure comprises a plurality of reflective structures.

5. The lighting apparatus according to claim 1 , wherein the at least one reflective structure is arranged over and in contact with at least a portion of the at least one driver circuit component.

6. The lighting apparatus according to claim 1 , wherein the at least one reflective structure is diffusively reflective or specularly reflective.

7. The lighting apparatus according to claim 1 , wherein the at least one reflective structure comprises at least one of a white color or a silver color.

8. The lighting apparatus according to claim 1 , wherein the at least one reflective structure comprises silicone.

9. The lighting apparatus according to claim 1 , wherein the at least one reflective structure comprises a diffuser or lens.

10. The lighting apparatus according to claim 9 , further comprising at least one other reflective structure disposed along or bounding at least a portion of the diffuser or lens.

11. The lighting apparatus according to claim 1 , wherein the at least one reflective structure comprises a dispensed silicone dam.

12. The lighting apparatus according to claim 1 , wherein the at least one reflective structure comprises a reflective coating.

13. A solid state lighting apparatus adapted to operate with alternating current (AC) received from an AC power source, the lighting apparatus comprising:
a substrate including a first surface, a second surface opposing the first surface, and at least one lateral edge bounding at least a portion of the first surface and the second surface;
an array of solid state light emitters arranged on or supported by the first surface of the substrate, the array of solid state light emitters comprising a plurality of electrically mutually exclusive solid state light emitter sets each comprising multiple solid state light emitters, wherein at least two different solid state light emitter sets of the plurality of electrically mutually exclusive solid state light emitter sets are arranged to be activated and/or deactivated at different times relative to one another during at least a positive portion of an AC cycle;
at least one driver circuit component arranged on or over the first surface of the substrate and arranged to drive the array of solid state light emitters; and
a reflective coating arranged over at least a portion of the at least one driver circuit component, wherein the reflective coating is arranged to reduce or eliminate absorption by the at least one driver circuit component of light generated by one or more solid state light emitters of the array of solid state light emitters;
wherein the lighting apparatus is devoid of any switched-mode power supply in electrical communication between the AC power source and the array of solid state light emitters.

14. The lighting apparatus according to claim 13 , wherein the reflective coating is arranged over an entirety of the at least one driver circuit component.

15. The lighting apparatus according to claim 13 , wherein the substrate comprises a plurality of electrically conductive traces along at least one of the first surface or the second surface of the substrate.

16. The lighting apparatus according to claim 13 , wherein the reflective coating is diffusively or specularly reflective.

17. The lighting apparatus according to claim 13 , wherein the reflective coating comprises at least one of a white color or a silver color.

18. The lighting apparatus according to claim 13 , wherein the reflective coating is dispensed, painted, or sprayed over portions of the at least one driver circuit component.

19. The lighting apparatus according to claim 13 , wherein the reflective coating comprises a wavelength conversion material.

20. A solid state lighting apparatus adapted to operate with alternating current (AC) received from an AC power source, the lighting apparatus comprising:
a substrate including a first surface, a second surface opposing the first surface, at least one lateral edge bounding at least a portion of the first surface and the second surface, electrical traces arranged on or over the first surface, and electrical traces arranged on or over the second surface;
an array of solid state light emitters arranged on or over the first surface, the array of solid state light emitters comprising a plurality of electrically mutually exclusive solid state light emitter sets each comprising multiple solid state light emitters, wherein at least two different solid state light emitter sets of the plurality of electrically mutually exclusive solid state light emitter sets are arranged to be activated and/or deactivated at different times relative to one another during at least a positive portion of an AC cycle; and
at least one driver circuit component arranged on or over the second surface and arranged to drive the array of solid state light emitters;
wherein the lighting apparatus is devoid of any switched-mode power supply in electrical communication between the AC power sour

Assignees

• Cree Inc

Inventors

• Brandes George R
• Underwood Robert D

Classifications

• H05B45/48

  having LEDs organised in strings and incorporating parallel shunting devices · CPC title

• H05B33/086

  Electricity · mapped topic

• H05B33/083 Primary

  Electricity · mapped topic

• H05B45/20 Primary

  Controlling the colour of the light · CPC title