Techniques for using quantum dots to regenerate light in display systems

Patent metadata

Field	Value
Publication number	US-9464769-B2
Application number	US-201113325284-A
Country	US
Kind code	B2
Filing date	Dec 14, 2011
Priority date	Sep 11, 2009
Publication date	Oct 11, 2016
Grant date	Oct 11, 2016

Abstract

Techniques for configuring light conversion materials such as quantum dots in a display system are described. A display system includes light source components that emit a first light. The display system further includes a light converter illuminated by the first light. The light converter converts the first light into second light comprising one or more color components to support a specific color gamut. The second light forms, based at least in part on image data for images to be rendered, an emission pattern that varies with space and time.

First claim

What is claimed is:

1. A display system, comprising:
a plurality of light source components that are configured to emit a first light; and
a light converter configured to be illuminated by the first light to convert the first light into second light, the second light comprising a mixture of two or more primary color components, and to illuminate pixels in one or more light modulation layers with the mixture of two or more primary color components;
wherein the mixture of two or more primary color components comprises light of a first primary color and light of one or more second primary colors;
wherein the light of the first primary color in the second light is generated by a first type of light conversion materials in the light converter that convert a first portion of the first light emitted by a first set of light source components in the plurality of light source components;
wherein the light of the one or more second primary colors in the second light is generated by one or more second types of light conversion materials in the light converter that convert one or more second portions of the first light emitted by a second set of light source components in the plurality of light source components;
wherein the first type of light conversion materials in the light converter is separate in space from the one or more second types of light conversion materials in the light converter;
wherein an intensity of the first portion of the first light emitted by the first set of light source components in the plurality of light source components to illuminate the first type of light conversion materials is controlled separately from intensities of the one or more second portions of the first light emitted by the second set of light source components in the plurality of light source components to illuminate the one or more second types of light conversion materials;
wherein the light converter represents a layer separate from the one or more light modulation layers.

2. The display system of claim 1 , wherein the plurality of light source components comprise light-emitting diodes.

3. The display system of claim 2 , wherein the light-emitting diodes comprise single colored light-emitting diodes.

4. The display system of claim 1 , wherein the display system is configured to direct the second light to illuminate one or more display panels.

5. The display system of claim 1 , wherein the light converter comprises a pattern of spatially non-overlapping light conversion units and wherein each of the spatially non-overlapping light conversion units is configured to produce a part of a single primary color component in the two or more primary color components in the second light.

6. The display system of claim 1 , wherein the display system is configured to illuminate a plurality of display panels with the second light regenerated from one or more light conversion materials in the light converter.

7. The display system of claim 1 , further comprising a reflector disposed with one or more light conversion materials configured to regenerate at least a portion of the second light with at least a portion of the first light from the plurality of light source components.

8. The display system of claim 1 , wherein the display system is configured to replace passive color filters with active color filters that comprise light conversion materials.

9. The display system of claim 1 , wherein at least one of absolute intensity or relative intensity of color components in the second light is monitored and regulated.

10. The display system of claim 1 , wherein the display system is configured to employ one or more pulse-width modulation (PWM) control signals to control relative and/or absolute intensities of at least one color component in the second light between a minimum intensity and a maximum intensity.

11. A method, comprising:
emitting, from a plurality of light source components, first light; and
illuminating a light converter by the first light to convert the first light by the light converter into second light, the second light comprising a mixture of two or more primary color components, and illuminate pixels in one or more light modulation layers with the mixture of two or more primary color components;
wherein the mixture of two or more primary color components comprises light of a first primary color and light of one or more second primary colors;
wherein the light of the first primary color in the second light is generated by a first type of light conversion materials in the light converter that convert a first portion of the first light emitted by a first set of light source components in the plurality of light source components;
wherein the light of the one or more second primary colors in the second light is generated by one or more second types of light conversion materials in the light converter that convert one or more second portions of the first light emitted by a second set of light source components in the plurality of light source components;
wherein the first type of light conversion materials in the light converter is separate in space from the one or more second types of light conversion materials in the light converter;
wherein an intensity of the first portion of the first light emitted by the first set of light source components in the plurality of light source components to illuminate the first type of light conversion materials is controlled separately from intensities of the one or more second portions of the first light emitted by the second set of light source components in the plurality of light source components to illuminate the one or more second types of light conversion materials;
wherein the light converter represents a layer separate from the one or more light modulation layers.

12. The method of claim 11 , wherein the plurality of light source components comprise light-emitting diodes.

13. The method of claim 12 , wherein the light-emitting diodes comprise single colored light-emitting diodes.

14. The method of claim 11 , further comprising directing the second light to illuminate one or more display panels.

15. The method of claim 11 , wherein the light converter comprises a pattern of spatially non-overlapping light conversion units and wherein each of the spatially non-overlapping light conversion units is configured to produce a part of a single primary color component in the two or more primary color components in the second light.

16. The method of claim 11 , further comprising illuminating a plurality of display panels with the second light regenerated from one or more light conversion materials in the light converter.

17. The method of claim 11 , wherein the method is performed by a display system, and wherein the display system comprises a reflector disposed with one or more light conversion materials configured to regenerate at least a portion of the second light with at least a portion of the first light from the plurality of light source components.

18. The method of claim 11 , wherein the method is performed by a display system, and wherein the display system is configured to replace passive color filters with active color filters that comprise light conversion materials.

19. The method of claim 11 , wherein at least one of absolute intensity or relative intensity of color components in the second light is monitored and regulated.

20. The method of claim 11 , wherein the method is performed by a display system, and wherein the display system is configured to employ one or more pulse-widt

Assignees

• Ninan Ajit
• Daly Scott
• Dolby Laboratories Licensing Corp

Inventors

• Ninan Ajit
• Daly Scott

Classifications

• G02B30/23 Primary

  using wavelength separation, e.g. using anaglyph techniques · CPC title

• G02B26/08 Primary

  for controlling the direction of light (in light guides G02B6/35) · CPC title

• B82Y20/00

  Nanooptics, e.g. quantum optics or photonic crystals · CPC title

• G09G3/003

  to produce spatial visual effects · CPC title

• G09G3/22

  using controlled light sources · CPC title