High dynamic range displays having wide color gamut and energy efficiency

• US 9,704,274 B2
• Filed: 06/17/2016
• Issued: 07/11/2017
• 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 I
• Application Number:
  US15/186,315
• Publication Number:
  US 20170024906A1
• Time in Patent Office: 389 Days
• 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 locally dimmed high dynamic range display system comprising:

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

a diffuser, said diffuser diffusing said light emitted from said emitter;

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

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

wherein said color layer placed in said optical path at a point where the light is collimated and said color layer is configured to perform a convolution upon light emitted from the said first modulator which operates in conjunction with a second modulator and other optical components together configured to produce a desired color gamut of the display and an image to be displayed by the display;

the second modulator comprising an LCD panel having color filters operative on the passband like color bands which are small enough that crosstalk between light in the color bands passing through the filters is eliminated, said second modulator modulating light from said 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, said controller receiving input image data and sending control signals to said first and said second modulators.

2. The display system according to claim 1 wherein said color layer comprises quantum dots.

3. The display system according to claim 2 wherein the display system comprises substantially a color gamut of one of a group, said group comprising:

P3 color gamut, Adobe RGB, Rec 709.

4. The display system according to claim 2, further comprising a UV light reflector, said UV light reflector reflecting UV light back to said color layer.

5. The display system according to claim 2, further comprising a full spectrum reflective surface upon which said array of light emitting elements are disposed, said full spectrum reflective surface reflects light back into the optical path of said display system.

6. The display system according to claim 2, wherein the color layer comprises UV light converting elements.

7. The display according to claim 2, wherein the color layer comprises nano-structures.

8. The display according to claim 2, wherein the color layer comprises a nano-material.

9. The display according to claim 2, wherein the display is constructed without air-gaps between layers.

10. The display according to claim 2, wherein the plurality of OLED elements are locally dimmed according to image data.

11. The display according to claim 2, wherein the color gamut comprises at least a P3 color gamut.

12. The display according to claim 2, wherein the color gamut comprises a wide color gamut.

13. The display according to claim 2, wherein the color gamut is a wide color gamut capable of saturated colors, and said color layer 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 wavelengths, and the controller configured to energize the array of light emitters and the second modulator according to image data and wherein at least one energization is performed in consideration of a point spread function of light emitted from the light emitters, the emitted light traveling through the color layer to the second modulator.