Light guide and display including a light guide

• US 20070268691A1
• Filed: 05/19/2006
• Published: 11/22/2007
• Est. Priority Date: 05/19/2006
• Status: Active Grant

• Current Assignee: Honeywell International Inc.
• Original Assignee: Honeywell International Inc.
• Inventors: Cernasov, Andrei
• Granted Patent: US 7,488,087 B2
• Time in Patent Office: Days
• US Class Current: 362/231
• CPC Class Codes: G02F 1/133621 providing coloured light G02F1/133617, G02F1/133533 take precedence

Abstract

A display comprises a backlight comprising different colored light sources, a transmissive display panel positioned adjacent to the backlight, and a light guide positioned between the backlight and the transmissive display. The light guide directs light from the different colored light sources onto the transmissive display to create an alternating array of colors.

Claims

1. A display, comprising:

a backlight comprising different colored light sources;

a transmissive display panel positioned adjacent to the backlight; and

a light guide positioned between the backlight and the transmissive display,

wherein the light guide directs light from the different colored light sources onto the transmissive display to create an alternating array of colors.

2. The display of claim 1, wherein the light guide comprises:

optical sheets positioned in alternating order to direct light from the different colored light sources, wherein the optical sheets are positioned in an alternating order to direct an alternating array of colors onto the transmissive display.

3. The display of claim 2, the light guide further comprising:

neutral optical sheets positioned between the optical sheets, wherein the neutral optical sheets do not direct light from the light sources.

4. The display of claim 2, wherein the optical sheets comprise:

first edges positioned adjacent to the backlight, wherein the first edges are tapered.

5. The display of claim 4, wherein the optical sheets further comprise:

a reflective surface to direct the light from the different colored light sources.

6. The display of claim 1, wherein a surface of the light guide positioned adjacent to the transmissive display is configured to evenly distribute light from the light sources along the surface of the light guide.

7. The display of claim 4, wherein the surface of the light guide is roughed to evenly distribute light along the surface.

8. The display of claim 4, wherein the surface of the light guide is lensed to evenly distribute light along the surface.

9. The display of claim 1, wherein a surface of the light guide partially disperses and partially reflect light from the light sources.

10. The display of claim 1, wherein the transmissive display panel is formed on a surface of the light guide.

11. The display of claim 1, further comprising:

a light sensor positioned adjacent to the light sources for detecting light from the light sources.

12. The display of claim 1, further comprising:

multiple backlights;

multiple light guides positioned between the multiple backlights and the transmissive display,

wherein the light guides direct light from the different colored light sources onto the transmissive display to create an alternating array of colors.

14. The light guide of claim 12, further comprising:

first edges positioned adjacent to the backlight, wherein the first edges are tapered.

15. The light guide of claim 12, further comprising:

a reflective surface to direct the light from the different colored light sources.

17. The light guide of claim 15, wherein the second edges are roughed to evenly distribute light along the surface.

18. The light guide of claim 15, wherein the second edges of the light guide are lensed to evenly distribute light along the surface.

20. The light guide of claim 15, wherein the transmissive display is formed on the second edges of the light guide.

21. The light guide of claim 12, further comprising:

neutral optical sheets positioned between the optical sheets, wherein the neutral optical sheets do not direct light from the light sources.

13. A light guide positioned between a transmissive display and a backlight, comprising:

optical sheets positioned in alternating order to direct light from the different colored light sources, wherein the optical sheets are positioned in an alternating order to direct an alternating array of colors onto the transmissive display.

16. The light guide of claim 13, further comprising:

second edges positioned adjacent to the transmissive display, wherein the second edges are configured to evenly distribute light from the light sources along the surface of the light guide.

19. The display of claim 13, further comprising

second edges positioned adjacent to the transmissive display, wherein the second edges partially disperse and partially reflect light from the light sources.

22. A display comprising:

means for creating different colored light;

means for transmitting selective amounts of the different colored light to generate video; and

means for directing light the different colored light onto the transmitting means to create an alternating array of colors.