METHODS OF MANUFACTURING ILLUMINATION SYSTEMS

• US 20120051088A1
• Filed: 08/25/2010
• Published: 03/01/2012
• Est. Priority Date: 08/25/2010
• Status: Abandoned Application

• Current Assignee: Snaptrack Incorporated (Qualcomm, Inc.)
• Original Assignee: Qualcomm MEMS Technologies Incorporated (Qualcomm, Inc.)
• Inventors: Chui, Clarence, Sethi, Gaurav, Griffiths, Jonathan Charles, Kothari, Manish
• Application Number:
  US12/868,649
• Publication Number:
  US 20120051088A1
• Time in Patent Office: Days
• US Class Current: 362/608
• CPC Class Codes: G02B 6/0036 2-D arrangement of prisms, protrusions, indentations or roughened surfaces
• CPC Class Codes: G02B 6/006 to produce indicia, symbols, texts or the like
• CPC Class Codes: G02B 6/0068 Arrangements of plural sources, e.g. multi-colour light sources

Abstract

Illumination systems and methods of manufacturing the same. In one embodiment, an illumination system includes a plurality of light sources configured to emit light into a light panel and a plurality of light turning features disposed on the light panel configured to turn light out of the light panel. The light sources can be configured to emit different colors of light than one another and the light turning features can be arranged such that a first light turning feature turns more light having a first color than any other color of light and such that a second light turning feature turns more light having a second color than any other color of light. In another embodiment, a method of manufacturing an illumination system includes providing a light panel and positioning a luminance altering element on the light panel such that a luminance characteristic of the panel changes.

Claims

1. An illumination system comprising:

a light panel having a first surface, a second surface opposite the first surface, a first edge, a second edge, and a third edge;

a first light source configured to emit light having a first color into the first edge;

a second light source configured to emit light having a second color into the second edge;

a third light source configured to emit light having a third color into the third edge;

a first light turning feature disposed on the first side, the first light turning feature having a first facet configured to turn light toward the second side of the light panel so that at least a portion of the turned light exits the second side of the light panel, the first facet being aligned to turn more light input from the first light source than light input from the second light source or third light source;

a second light turning feature disposed on the first side, the second light turning feature having a second facet configured to turn light toward the second side of the light panel so that at least a portion of the turned light exits the second side of the light panel, the second facet being aligned to turn more light input from the second light source than light input from the third light source or first light source; and

a third light turning feature disposed on the first side, the third light turning feature having a third facet configured to turn light toward the second side of the light panel so that so that at least a portion of the turned light exits the second side of the light panel, the third facet being aligned to turn more light input from the third light source than light input from the second light source or first light source.

2. The illumination system of claim 1, wherein the first color is different from the second color.

3. The illumination system of claim 2, wherein the second color is different from the third color.

4. The illumination system of claim 3, wherein the first color is red.

5. The illumination system of claim 4, wherein the second color is green.

6. The illumination system of claim 5, wherein the third color is blue.

7. The illumination system of claim 1, wherein the first light turning feature has a first index of refraction characteristic, wherein the light panel has an index of refraction characteristic, and wherein the index of refraction characteristic of the light panel is about the same as the first index of refraction characteristic.

8. The illumination system of claim 7, further comprising a coupling layer, wherein the coupling layer is disposed between at least a portion of the first light turning feature and at least a portion of the light panel, wherein the coupling layer has an index of refraction characteristic and wherein the index of refraction characteristic of the coupling layer is about the same as the first index of refraction characteristic.

9. The illumination system of claim 7, wherein the second light turning feature has a second index of refraction characteristic, wherein first index of refraction characteristic is about the same as the second index of refraction characteristic.

10. The illumination system of claim 9, wherein the third light turning feature has a third index of refraction characteristic, wherein the first index of refraction characteristic is about the same as the third index of refraction characteristic.

11. The illumination system of claim 10, wherein the first light turning feature is a prismatic block.

12. The illumination system of claim 11, wherein the second light turning feature is a prismatic block.

13. The illumination system of claim 12, wherein the third light turning feature is a prismatic block.

14. The illumination system of claim 13, wherein the first light turning feature, second light turning feature, and third light turning feature form a pixel.

15. The illumination system of claim 14, wherein the light panel comprises a plurality of pixels.

16. An illumination system comprising:

a light panel having a first surface, a second surface opposite the first surface, a first edge portion, a second edge portion, and a third edge portion;

a first light source configured to emit light having a first color into the first edge portion;

a second light source configured to emit light having a second color into the second edge portion;

a third light source configured to emit light having a third color into the third edge portion; and

a first pixel configured to turn light input into the light panel from the first light source, second light source, and third light source into the light panel toward the second side, the pixel comprising

a first light turning feature comprising a first facet aligned to turn light input from the first light source,

a second light turning feature comprising a second facet aligned to turn light input from the second light source, and

a third light turning feature comprising a third facet aligned to turn light input from the third light source.

17. The illumination system of claim 16, wherein the first light source is different than the second light source.

18. The illumination system of claim 17, wherein the second light source is different than the third light source.

19. The illumination system of claim 18, wherein the first light source is red.

20. The illumination system of claim 19, wherein the second light source is green.

21. The illumination system of claim 20, wherein the third light source blue.

22. The illumination system of claim 16, wherein the first light turning feature is configured to turn more light input from the first light source than light input from the second light source or third light source.

23. The illumination system of claim 22, wherein the second light turning feature is configured to turn more light input from the second light source than light input from the third light source or first light source.

24. The illumination system of claim 23, wherein the third light turning feature is configured to turn more light input from the third light source than light input from the second light source or first light source.

25. The illumination system of claim 16, further comprising a second pixel, wherein the second pixel comprises

a fourth light turning feature having a fourth facet aligned to turn light input from the first light source;

a fifth light turning feature having a fifth facet aligned to turn light input from the second light source; and

a sixth light turning feature having a sixth facet aligned to turn light input from the third light source.

26. An illumination system comprising:

a light panel having a first surface, a second surface opposite the first surface, a first edge portion, a second edge portion, and a third edge portion;

first means for generating light having a first color, the first light generating means being configured to emit light into the first edge portion;

second means for generating light having a second color, the second light generating means being configured to emit light into the second edge portion;

third means for generating light having a third color, the third light generating means being configured to emit light into the third edge portion; and

pixel means configured to turn light input into the light panel from the first light generating means, second light generating means, and third light generating means toward the second side, the pixel means comprising

first light turning means aligned to turn light input from the first light generating means,

second light turning means aligned to turn light input from the second light generating means, and

third light turning means aligned to turn light input from the third light generating means.

27. A method of manufacturing a illumination system, the method comprising:

providing a light panel having a first surface, a second surface opposite the first surface, a first edge, a second edge, and a third edge;

positioning a first light source configured to emit light having a first color near the first edge of the light panel and aligned to provide light into the light panel through the first edge;

positioning a second light source configured to emit light having a second color near the second edge of the light panel and aligned to provide light into the light panel through the second edge;

positioning a third light source configured to emit light having a third color near the third edge of the light panel and aligned to provide light into the light panel through the third edge;

positioning a first prismatic block on the first surface such that a first facet of the first prismatic block is aligned to turn light emitted by the first light source toward the second surface;

positioning a second prismatic block on the first surface such that a second facet of the second prismatic block is aligned to turn light emitted by the second light source toward the second surface; and

positioning a third prismatic block on the first surface such that a third facet of the third prismatic block is aligned to turn light emitted by the third light source toward the second surface.

28. The method of claim 27, wherein the first color is different than the second color.

29. The method of claim 28, wherein the second color is different than the third color.

30. The method of claim 29, further comprising positioning the first prismatic block, second prismatic block, and third prismatic block to form a pixel that comprises the first prismatic block, second prismatic block, and third prismatic block.

31. The method of claim 27, further comprising bonding the first prismatic block, second prismatic block, and third prismatic block to the light panel with a coupling layer.

32. The method of claim 31, wherein the first prismatic block has a first index of refraction characteristic, wherein the second prismatic block has a second index of refraction characteristic that is about the same as the first index of refraction characteristic, wherein the third prismatic block has a third index of refraction characteristic that is about the same as the second index of refraction characteristic, wherein the light panel has an index of refraction characteristic that is about the same as the first index of refraction characteristic, and wherein the bonding agent has an index of refraction characteristic that is about the same as the first index of refraction characteristic.

33. A method of manufacturing a illumination system, the method comprising:

providing a light panel having a first surface, a second surface opposite the first surface, a first edge, and a second edge, the light panel having a first luminance characteristic; and

positioning a first luminance altering element on the first surface and a second luminance altering element on the first surface such that the light panel has a second luminance characteristic, wherein the second luminance characteristic is different than the first luminance characteristic.

34. The method of claim 33, wherein the first luminance altering element comprises an element selected from the group consisting of prismatic blocks, glues, adhesives, and bonding agents.

35. The method of claim 34, wherein the second luminance altering element comprises an element selected from the group consisting of prismatic blocks, glues, adhesives, and bonding agents.

36. The method of claim 35, wherein the first and second luminance altering elements comprise prismatic blocks.

37. The method of claim 33, further comprising:

positioning a first light source configured to emit light having a first color near the first edge of the light panel; and

positioning a second light source configured to emit light having a second color near the second edge of the light panel.

38. The method of claim 37, wherein the first luminance altering element is configured to turn at least a portion of the light emitted by the first light source toward the second surface.

39. The method of claim 38, wherein the second luminance altering element is configured to turn at least a portion of the light emitted by the second light source toward the second surface.

40. The method of claim 39, wherein the first luminance altering element is configured to turn more light emitted by the first light source than light emitted by the second light source, and the second luminance altering element is configured to turn more light emitted by the second light source than light emitted by the first light source.