High Dynamic Range Displays Having Wide Color Gamut and Energy Efficiency

• US 20140192078A1
• Filed: 08/23/2012
• Published: 07/10/2014
• Est. Priority Date: 08/24/2011
• Status: Active Grant

• Current Assignee: Dolby Laboratories Licensing Corporation (Dolby Laboratories Incorporated)
• Original Assignee: Dolby Laboratories Licensing Corporation (Dolby Laboratories Incorporated)
• Inventors: Gilbert, John
• Granted Patent: US 9,373,178 B2
• Time in Patent Office: Days
• US Class Current: 345/590
• 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, 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 placed within said optical path and transmitting said light within said optical path; and

a color notch filter, said color notch filter placed in said optical path for conditioning light transmitted in said optical path whereby the resulting light convolved by said first modulator and said color notch filter provides a desired color gamut of said display system.

2. The display system as recited in claim 1 wherein said emitter comprises an array of discrete, individually controllable emitters, each said emitter emanating a colored light.

3. The display system as recited in claim 1 wherein said emitter is one of a group, said group comprising:

LEDs, OLED, CCFL, halogen, arc lamp.

4. The display system as recited in claim 2 wherein said emitter is one of a group, said group comprising:

an OLED element, a quantum dot emitter.

5. The display system as recited in claim 1 wherein said color notch filter is placed before said first modulator in said optical path.

6. The display system as recited in claim 1 wherein said first modulator is placed before said color notch filter in said optical path.

7. The display system as recited in claim 1 wherein said display system further comprises a controller, said controller receiving input image data and performing a gamut mapping algorithm upon said image data and providing control signals to said first modulator to render an image upon said display system.

8. The display system as recited in claim 1 wherein said display system further comprises a controller, said controller receiving input image data and performing a subpixel rendering algorithm upon said image data and providing control signals to said first modulator to render an image upon said display system.

9. A display system comprising:

an emitter, said emitter emanating light into an optical path;

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

a color notch filter for filtering light from said diffuser;

a first LCD modulator, said first LCD modulator modulating light from said color notch filter;

a second LCD modulator, said second LCD modulator modulating light from said LCD modulator; and

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

10. The display system as recited in claim 9 wherein said color notch filter and said first LCD modulator and second LCD modulator convolve the light emanating from said emitter to produce a desired color gamut of said display system.

11. The display system as recited in claim 10 wherein said display system comprises substantially a color gamut of one of a group, said group comprising:

P3 color gamut, Adobe RGB, Rec 709.

12. 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.

13. The display system as recited in claim 12 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

14. The display system as recited in claim 12 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.

15. The display system as recited in claim 14 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.