Color filter arrays

• US 10,443,818 B2
• Filed: 05/16/2017
• Issued: 10/15/2019
• Est. Priority Date: 09/19/2012
• Status: Active Grant

• Current Assignee: Dolby Laboratories Licensing Corporation (Dolby Laboratories Incorporated)
• Original Assignee: Dolby Laboratories Licensing Corporation (Dolby Laboratories Incorporated)
• Inventors: Ninan, Ajit, Wan, Chun Chi, Kunkel, Timo, Miller, Michael Eugene
• Primary Examiner(s): Nikmanesh, Seahvosh
• Application Number:
  US15/596,564
• Publication Number:
  US 20170248745A1
• Time in Patent Office: 882 Days
• CPC Class Codes: B82Y 20/00 Nanooptics, e.g. quantum optics or photonic crystals
• CPC Class Codes: F21V 9/08 for producing coloured light, e.g. monochromatic; for reducing intensity of light with provision for controlling the colour F21V9/40
• CPC Class Codes: G02B 5/201 in the form of arrays
• CPC Class Codes: G02B 5/22 Absorbing filters G02B5/201 - G02B5/208 take precedence
• CPC Class Codes: G02F 1/133514 Colour filters
• CPC Class Codes: G02F 1/133516 Methods for their manufacture, e.g. printing, electro-deposition or photolithography
• CPC Class Codes: G02F 1/133614 using photoluminescence, e.g. phosphors illuminated by UV or blue light
• CPC Class Codes: G02F 1/133617 Illumination with ultraviolet light; Luminescent elements or materials associated to the cell
• CPC Class Codes: G02F 2202/046 fluorescent
• CPC Class Codes: H04N 13/334 using spectral multiplexing
• CPC Class Codes: H10K 2102/331 Nanoparticles used in non-emissive layers, e.g. in packaging layer
• CPC Class Codes: H10K 59/38 comprising colour filters or colour changing media [CCM]
• CPC Class Codes: H10K 71/00 Manufacture or treatment specially adapted for the organic devices covered by this subclass
• CPC Class Codes: Y10S 977/774 Exhibiting three-dimensional carrier confinement, e.g. quantum dots

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.

Claims

1. A method, comprising:

individually reducing each stack sheet of two or more stack sheets to a respective thickness, wherein each stack sheet of the two or more stack sheets corresponds to a respective subpixel type in a plurality of subpixel types;

stacking the two or more stack sheets in a subpixel order of a pixel;

repeatedly cutting, across each of the two or more stack sheets along a first planar direction of the two or more stacked sheets, the stacked two or more stack sheets into stacking segments, wherein each of the stacking segments is of a same specific thickness, wherein each of the stacking segments comprise two or more stripes of the two or more stack sheets;

rotating the stacking segments around the first planar direction by 90 degrees;

stacking the rotated stacking segments along a second planar direction of the two or more stack sheets to form a stacking segment layer with a specific pitch of the plurality of subpixel types along the second planar direction, the second planar direction of the two or more stack sheets being orthogonal to the first planar direction of the two or more stack sheets.

2. The method as recited in claim 1, wherein the two or more stack sheets comprise three stack sheets that respectively correspond to three subpixel types of three different primary colors.

3. The method as recited in claim 1, wherein at least one of the two or more stack sheets comprises light regeneration materials.

4. The method as recited in claim 3, wherein the light regeneration materials are quantum dot materials.

5. The method as recited in claim 1, further comprising:

applying a mechanical pressure over the two or more stack sheets as stacked, along the first direction, to a specific overall thickness of a pixel.

6. The method as recited in claim 1, wherein the stacking segment layer is incorporated into an image display as a color filter array.

7. The method as recited in claim 6, wherein the image display comprises a light regulation layer and a light source.

8. The method as recited in claim 7, wherein the color filter array is between the light regulation layer and the light source.

9. The method as recited in claim 7, wherein the light regulation layer is monochromatic.

10. The method as recited in claim 7, wherein the light source emits blue light.

11. The method as recited in claim 7, wherein the light source comprises one or more of:

UV light sources, laser light sources, light-emitting diodes (LEDs), or cold cathode fluorescent lights (CCFLs).

12. The method as recited in claim 6, wherein the image display comprises an organic light emitting diode (OLED) layer.

13. The method as recited in claim 12, wherein the color filter array is in front of the OLED layer to filter light from the OLED layer.

14. The method as recited in claim 12, wherein the OLED layer emits white light.

15. The method as recited in claim 12, wherein the OLED layer emits blue light.

16. The method as recited in claim 6, wherein the image display comprises one or more notch filter layers configured to receive incoming light and to filter out secondary spectral components from the incoming light directed to a viewer of the image display.

17. The method as recited in claim 1, wherein a plurality of subpixel types comprises subpixels imparting two sets of primary colors, and wherein each set in the two sets of primary colors is configured to support a full complement of a primary color system.

18. The method as recited in claim 1, wherein each of the stacking segments corresponds to a plurality of pixels.