High dynamic range displays having wide color gamut and energy efficiency

• US 9,373,178 B2
• Filed: 08/23/2012
• Issued: 06/21/2016
• Est. Priority Date: 08/24/2011
• Status: Expired due to Fees

• Current Assignee: Dolby Laboratories Licensing Corporation (Dolby Laboratories Incorporated)
• Original Assignee: Dolby Laboratories Licensing Corporation (Dolby Laboratories Incorporated)
• Inventors: Gilbert, John
• Primary Examiner(s): Abdulselam, Abbas
• Application Number:
  US14/237,309
• Publication Number:
  US 20140192078A1
• Time in Patent Office: 1,398 Days
• US Class Current: 1/1
• CPC Class Codes: G02F 1/133514 Colour filters
• CPC Class Codes: G02F 1/133614 using photoluminescence, e.g. phosphors illuminated by UV or blue light
• CPC Class Codes: G06T 11/001 Texturing; Colouring; Generation of texture or colour inpainting G06T5/77
• CPC Class Codes: G09G 2300/023 Display panel composed of stacked panels
• CPC Class Codes: G09G 2320/0209 Crosstalk reduction, i.e. to reduce direct or indirect influences of signals directed to a certain pixel of the displayed image on other pixels of said image, inclusive of influences affecting pixels in different frames or fields or sub-images which constitute a same image, e.g. left and right images of a stereoscopic display
• CPC Class Codes: G09G 2320/066 for control of contrast
• CPC Class Codes: G09G 2320/0666 for control of colour parameters, e.g. colour temperature
• CPC Class Codes: G09G 2340/0457 Improvement of perceived resolution by subpixel rendering
• CPC Class Codes: G09G 2340/06 Colour space transformation
• CPC Class Codes: G09G 3/3406 Control of illumination source illumination devices structurally associated with liquid crystal cells G02F1/1336
• CPC Class Codes: G09G 3/3413 Details of control of colour illumination sources
• CPC Class Codes: G09G 3/3426 the different display panel areas being distributed in two dimensions, e.g. matrix
• CPC Class Codes: G09G 3/3607 for displaying colours or for displaying grey scales with a specific pixel layout, e.g. using sub-pixels display of colours in flat matrix panels other than liquid crystal displays G09G3/2003; grey scales specific for television H04N3/127
• CPC Class Codes: G09G 5/028 Circuits for converting colour display signals into monochrome display signals

Abstract

Several embodiments of display systems that have wide color gamut performance are disclosed herein. In one embodiment, a display system comprises a plurality of emitters, said emitters emanating light into an optical path; a first modulator, said first modulator comprising a plurality of colored subpixels and wherein said first modulator transmitting light emanating from said emitters in said optical path; and a color notch filter, said color notch filter placed in said optical path for conditioning or convolving light together with said first modulator.

Claims

1. A display system comprising:

an emitter, the emitter comprising an array of light emitting elements of a same color controlled in a locally dimmed configuration and emanating light into an optical path;

a diffuser, the diffuser diffusing the light emanating from the emitter;

a color layer configured to receive light from the diffuser and mitigate crosstalk by emitting different passband-like color bands of distinct colors and provide a specific color gamut;

wherein the emitter as locally dimmed comprises a first modulator configured to transmit light through the diffuser and the color layer;

wherein the color layer placed in the optical path for convolving light together with the first modulator and a second modulator to produce a desired color gamut of the display;

a second modulator, comprising an LCD panel, the second modulator modulating light from the first modulator in a manner without color overlap such that each color filter of the LCD panel acts independent of adjacent color filters; and

a controller, the controller receiving input image data and sending control signals to the first and the second modulators.

2. The display system as recited in claim 1 wherein the color layer comprises at least one of phosphorescent and quantum dot materials.

3. The display system as recited in claim 2, wherein the display system comprises substantially a color gamut of one of a group, the group comprising:

P3 color gamut, Adobe RGB, and Rec 709.

4. The display according to claim 1, wherein a desired color gamut is a wide color gamut capable of saturated colors, and the color layer configured to produce saturated lights, and wherein the saturated lights are convolved together with the first modulator and the second modulator to produce the desired color gamut of the display.

5. A display system comprising:

an emitter, said emitter comprising a plurality of OLED elements, said OLED elements further comprising UV light-emitting element and UV light-converting elements;

a UV light reflector, said UV light reflector reflecting UV light back to said UV light-converting elements and transmitting visible light from said emitter;

a LCD modulator, said LCD modulator modulating light from said UV light reflector;

a color notch filter, said color notch filter filtering light from said LCD modulator; and

a controller, said controller receiving input image data and sending control signals to said LCD modulator.

6. The display system as recited in claim 5, wherein said color notch filter and said LCD modulator convolve the light emanating from said emitter to produce a desired color gamut of said display system.

7. The display system as recited in claim 6 wherein each said OLED element further comprising:

a UV emitter;

a control line, said control line connected to said UV emitter for providing an actuation signal to produce UV light;

a fluorescent material, said fluorescent material absorbing said UV light and converting said UV light into light in the visible spectrum.

8. The display system as recited in claim 7 wherein further said OLED element is constructed upon a full spectrum reflective surface, said full spectrum reflective surface reflects light back into the optical path of said display system.

9. The display according to claim 5, wherein the UV light-converting elements comprise quantum dots.

10. The display according to claim 5, wherein the UV light-converting elements comprise nano-structures.

11. The display according to claim 5, wherein the UV light-converting elements comprise a nano-material.

12. The display according to claim 5, wherein the display is constructed without air-gaps between layers.

13. The display according to claim 5, wherein the plurality of OLED elements are locally dimmed according to image data.

14. The display according to claim 5, wherein a desired color gamut comprises at least one of P3 color gamut, Adobe RGB, and Rec 709.

15. The display according to claim 5, wherein a desired color gamut comprises a wide color gamut.

16. The display according to claim 5, wherein the color notch filter comprises a color layer configured to mitigate crosstalk between adjacent pixels/subpixels of the LCD modulator by emitting different passband-like color bands of distinct colors.

17. The display according to claim 5, wherein a desired color gamut is a wide color gamut capable of saturated colors, and the color notch filter configured to produce saturated green light that is shifted towards blue part of the spectra and narrowed to provide a color point that is highly saturated in blue-green (or cyan).