Quantum dot/remote phosphor display system improvements

Patent metadata

Field	Value
Publication number	US-9746157-B2
Application number	US-201314030896-A
Country	US
Kind code	B2
Filing date	Sep 18, 2013
Priority date	Sep 19, 2012
Publication date	Aug 29, 2017
Grant date	Aug 29, 2017

Abstract

A display system comprises light sources configured to emit first light with a first spectral power distribution; light regeneration layers configured to be stimulated by the first light and to convert at least a portion of the first light and recycled light into second light, the second light comprising (a) primary spectral components that correspond to primary colors and (b) secondary spectral components that do not correspond to the primary colors; and notch filter layers configured to receive a portion of the second light and to filter out the secondary spectral components from the portion of the second light. The portion of the second light can be directed to a viewer of the display system and configured to render images viewable to the viewer.

First claim

What is claimed is:

1. A display system, comprising:
one or more light sources configured to emit first light with a first spectral power distribution;
one or more light regeneration layers configured to be stimulated by the first light and to convert at least a portion of the first light and recycled light into second light, the second light comprising (a) primary spectral components that correspond to one or more primary colors and (b) secondary spectral components that do not correspond to the one or more primary colors; and
one or more notch filter layers configured to receive a portion of the second light and to filter out the secondary spectral components from the portion of the second light, wherein the portion of the second light is directed to a viewer of the display system and configured to render images viewable to the viewer;
an optical stack comprising a light modulation layer having liquid crystal cells disposed above the light regeneration layer;
a color filter layer disposed above the optical stack and the light regeneration layer;
wherein pixel structures formed in the light modulation layer and color filter layer are separate from the one or more light regeneration layers;
wherein the one or more notch filter layers are disposed (c) below the pixel structures of the display system and (d) between the pixel structures and the one or more light regeneration layers;
wherein the liquid crystal cells are settable to a plurality of transparent states for controlling intensity of transmitted light for image rendering.

2. The display system as recited in claim 1 , wherein the first light comprises one or more of: UV spectral components or blue light spectral components.

3. The display system as recited in claim 1 , wherein the one or more light sources comprises one or more of: laser light sources, light-emitting diodes (LEDs), or cold cathode fluorescent lights (CCFLs).

4. The display system as recited in claim 1 , wherein at least one of the light regeneration layers comprises one or more of: quantum dot materials or remote phosphor materials.

5. The display system as recited in claim 1 , further comprising:
one or more light modulation layers configured to modulate light transmitting through individual subpixels in a plurality of subpixels of the display system;
one or more color filter layers configured to impart designated primary colors to the individual subpixels in the plurality of subpixels; and
zero or more additional optical stacks.

6. The display system as recited in claim 1 , wherein at least one of the one or more light sources, at least one of the one or more light regeneration layers, and at least one of the one or more notch filter layers form a light unit to the display system.

7. The display system as recited in claim 1 , wherein at least one of the one or more light regeneration layers and the one or more notch filter layers are separate from a light unit to the display system.

8. The display system as recited in claim 1 , wherein the primary spectral components represent at least two sets of primary colors, wherein each set in the at least two sets of primary colors is configured to support a full complement of a primary color system, wherein a plurality of primary spectral components corresponds to a plurality of non-overlapping light wavelength ranges, and wherein each of the plurality of primary spectral components in the at least two sets of primary colors is in a respective light wavelength range in the plurality of non-overlapping light wavelength ranges.

9. The display system as recited in claim 1 , wherein the display system is configured to recycle at least a portion of transmissive light comprises one or more of light originated from the one or more light sources, light regenerated by the one or more light regeneration layers, or light reflected by one or more components in the display system.

10. A method, comprising:
emitting, with one or more light sources, first light with a first spectral power distribution;
stimulating one or more light regeneration layers with the first light to convert at least a portion of the first light and recycled light into second light, the second light comprising (a) primary spectral components that correspond to one or more primary colors and (b) secondary spectral components that do not correspond to the one or more primary colors; and
receiving, by one or more notch filter layers, a portion of the second light, wherein the one or more notch filter layers filter out the secondary spectral components from the portion of the second light, wherein the portion of the second light is directed to a viewer of a display system and configured to render images viewable to the viewer;
an optical stack comprising a light modulation layer having liquid crystal cells disposed above the light regeneration layer;
a color filter layer disposed above the optical stack and the light regeneration layer;
wherein pixel structures formed in the light modulation layer and color filter layer are separate from the one or more light regeneration layers;
wherein the one or more notch filter layers are disposed (c) below the pixel structures of the display system and (d) between the pixel structures and the one or more light regeneration layers;
wherein the liquid crystal cells are settable to a plurality of transparent states for controlling intensity of transmitted light for image rendering.

11. The method as recited in claim 10 , wherein the first light comprises one or more of UV spectral components, or blue light spectral components.

12. The method as recited in claim 10 , wherein the one or more light sources comprises one or more of laser light sources, light-emitting diodes (LEDs), or cold cathode fluorescent lights (CCFLs).

13. The method as recited in claim 10 , wherein at least one of the light regeneration layers comprises one or more of: quantum dot materials or remote phosphor materials.

14. The method as recited in claim 10 , further comprising:
modulating, with one or more light modulation layers, light transmitting through individual subpixels in a plurality of subpixels of the display system;
imparting designated primary colors to the individual subpixels in the plurality of subpixels with one or more color filter layers.

15. The method as recited in claim 10 , wherein at least one of the one or more light sources, at least one of the one or more light regeneration layers, and at least one of the one or more notch filter layers form a light unit to the display system.

16. The method as recited in claim 10 , wherein at least one of the one or more light regeneration layers and the one or more notch filter layers are separate from a light unit to the display system.

17. The method as recited in claim 10 , wherein the primary spectral components represents at least two sets of primary colors, wherein each set in the at least two sets of primary colors is configured to support a full complement of a primary color system, wherein a plurality of primary spectral components corresponds to a plurality of non-overlapping light wavelength ranges, and wherein each of the plurality of primary spectral components in the at least two sets of primary colors is in a respective light wavelength range in the plurality of non-overlapping light wavelength ranges.

18. The method as recited in claim 10 , wherein the display system is configured to recycle at least a portion of transmissive light comprises one or more of light originated from the one or more light sources, light regenerated by the o

Assignees

• Dolby Laboratories Licensing Corp

Inventors

• Ninan Ajit
• Wan Chun Chi
• Kunkel Timo
• Miller Michael Eugene

Classifications

• G02F1/133617 Primary

  Illumination with ultraviolet light; Luminescent elements or materials associated to the cell · CPC title

• Y10S977/774

  Exhibiting three-dimensional carrier confinement, e.g. quantum dots · CPC title

• H04N13/334

  using spectral multiplexing · CPC title

• G02B5/22

  Absorbing filters {(G02B5/201 - G02B5/208 take precedence)} · CPC title

• G02F1/133516

  Methods for their manufacture, e.g. printing, electro-deposition or photolithography · CPC title