Quantum dots for display panels

Patent metadata

Field	Value
Publication number	US-9564078-B2
Application number	US-201113993181-A
Country	US
Kind code	B2
Filing date	Dec 14, 2011
Priority date	Dec 17, 2010
Publication date	Feb 7, 2017
Grant date	Feb 7, 2017

Abstract

Techniques for rendering images directly with light conversion materials are described. In some embodiments, image data for one or more image frames is received. A light source may be controlled to emit first light to irradiate a light conversion material disposed with an image rendering surface. Second light that renders the one or more image frames may be emitted from the light conversion material. The second light emitted from the light conversion material may be excited by the first light. A display system under techniques herein may be free of a light valve layer on which light transmittance is modulated on a pixel-by-pixel basis.

First claim

What is claimed is:

1. A method comprising:
receiving image data for stereoscopic image frames;
controlling, based on the image data, a light source to emit a first light to irradiate a light conversion material disposed with an image rendering surface;
emitting, with the light conversion material, a second light to render at least a portion of the stereoscopic image frames on the image rendering surface;
wherein
the second light is excited by the first light,
the light conversion material includes quantum dots, the second light is non-coherent light,
the quantum dots are disposed in a two dimensional array on the image rendering surface to form a plurality of pixels, each pixel in the plurality of pixels comprises a first red sub-pixel configured to impart a first red color light in the second light and a second red sub-pixel configured to impart a second red color light in the second light, the first red color light and the second red color light are of mutually non-overlapping wavelengths,
the first light represents one or more light beams sequentially scanning the plurality of pixels,
the first red sub-pixel is associated with a left image block of the stereoscopic image frames; and
the second red sub-pixel is associated with a right image block of the stereoscopic image frames.

2. The method of claim 1 , wherein each pixel in the plurality of pixels comprises six sub-pixels each configured to impart different colors.

3. The method of claim 1 , wherein the light source is a laser that emits a coherent laser beam as the first light.

4. The method of claim 1 , wherein the first light sweeps though a portion of the image rendering area in at least one sweeping direction.

5. The method of claim 1 , wherein strength of the first light is modulated based on at least a portion of the image data, as the first light is sweeping through the portion of the image rendering area.

6. The method of claim 1 , wherein the light source is located at least one of: in front, behind, above, and below relative to the image rendering surface.

7. The method of claim 1 , wherein the quantum dots comprise six different types of quantum dots, each type configured to emit a different color.

8. The method of claim 1 , wherein the first light comprises two mutually non-overlapping wavelength ranges, wherein each of the mutually non-overlapping wavelength ranges corresponds different colors, and wherein the first light in a first mutually non-overlapping wavelength range, in the mutually non-overlapping wavelength ranges, irradiates a first type of quantum dots at a same time as the first light in a second different mutually non-overlapping wavelength range, in the mutually non-overlapping wavelength ranges, irradiates a second different type of quantum dots.

9. The method of claim 1 , wherein the light conversion material comprises six different types of quantum dots, and wherein the six different types of quantum dots are irradiated at three mutually non-overlapping time durations.

10. The method of claim 1 , wherein the second light emitted with a first set of quantum dots renders the left image block of a stereoscopic image, while the second light emitted with a second different set of quantum dots renders the right image block of the stereoscopic image.

11. A display system comprising:
a light conversion material disposed with an image rendering surface and configured to emit a second light to render at least a portion of one or image frames on the image rendering surface;
a light source to emit a first light to irradiate the light conversion material and to excite the light conversion material to emit the second light;
wherein the display system is configured to receive image data for the one or more image frames, and to control, based on the image data, the light source to emit the first light to irradiate the light conversion material disposed with the image rendering surface,
wherein
the light conversion material includes at least one of quantum dots and quantum wells, the second light is non-coherent light,
the quantum dots and/or quantum wells are disposed in a two dimensional array on the image rendering surface to form a plurality of pixels, each pixel in the plurality of pixels comprises a first red sub-pixel configured to impart a first red color light in the second light and a second red sub-pixel configured to impart a second red color light in the second light, the first red color light and the second red color light are of mutually non-overlapping wavelengths,
the first light represents one or more light beams sequentially scanning the plurality of pixels,
the first red sub-pixel is associated with a left image block of a stereoscopic image, and
the second red sub-pixel is associated with a right image block of the stereoscopic image.

12. The display system of claim 11 , wherein each pixel in the plurality of pixels comprises six sub-pixels each configured to impart different colors.

13. The display system of claim 11 , wherein the light source is a laser that emits a coherent laser beam as the first light.

14. The display system of claim 11 , wherein the light source is configure to cause the first light to sweep through a portion of the image rendering area in at least one sweeping direction.

15. The display system of claim 11 , wherein strength of the first light is modulated based on at least a portion of the image data, as the first light is sweeping through the portion of the image rendering area.

16. The display system of claim 11 , wherein the light source is located in front of, behind, or at a top position, a bottom position, or another position relative to, the image rendering surface.

17. A non-transitory computer readable storage medium, comprising software instructions, which when executed by one or more processors cause performance of the methods recited in claim 1 .

Assignees

• Ninan Ajit
• Dolby Laboratories Licensing Corp

Inventors

• Ninan Ajit

Classifications

• G09G3/025

  with scanning or deflecting the beams in two directions or dimensions · CPC title

• G02B30/23 Primary

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

• H04N9/3129

  scanning a light beam on the display screen (scanning a light beam on a screen in displays other than projection devices G09G3/02; scanning systems in general G02B26/10; projectors using laser light sources in general H04N9/3161) · CPC title

• F21V9/08

  for producing coloured light, e.g. monochromatic; for reducing intensity of light (with provision for controlling the colour F21V9/40) · CPC title

• G09G5/14

  Display of multiple viewports · CPC title