Colour inorganic led display for display devices with a high number of pixel

Patent metadata

Field	Value
Publication number	US-2019237442-A1
Application number	US-201916269505-A
Country	US
Kind code	A1
Filing date	Feb 6, 2019
Priority date	Jul 31, 2014
Publication date	Aug 1, 2019
Grant date	—

Abstract

An image generator for use in a display device, the image generator comprising a plurality of ILED array chips each comprising a plurality of ILED emitters and arranged in an array such that each of a plurality of pixels of the image generator comprises an ILED emitter from each of a plurality of adjacent ILED array chips. The toal area of ILED emitter material be less than 50% of the area of each pixel. The image generator may comprise secondary optics in optical communication with an output of the plurality of ILED emitters of an ILED array chip and configured to direct light from the ILED emitters towards an emission region of the associated pixel.

First claim

What is claimed is:

1 . A display device, comprising:
inorganic light emitting diode (ILED) array chips arranged to form pixels of the display device, each ILED array chip including a plurality of ILED emitters each providing a subpixel for a different pixel of the display device, the ILED array chips arranged such that each pixel of the display device includes an ILED emitter from each of a plurality of adjacent ILED array chips.

2 . The display device of claim 1 , wherein a total area of ILED emitter material is in a range from 5% to 10% of an area of each pixel.

3 . The display device of claim 1 , further comprising secondary optics in optical communication with an output of the plurality of ILED emitters of an ILED array chip and configured to direct light from the plurality of ILED emitters towards an emissions region of a pixel.

4 . The display device of claim 3 , wherein the secondary optics comprise one or more of: reflective structures, light turning optics, light extraction features, Fresnel type structures, printed optics, etched optics, holographic optics, or a diffraction grating.

5 . The display device of claim 3 , wherein the secondary optics include light extraction features configured to reduce or remove internal reflection of the secondary optics such that light is emitted from the secondary optics.

6 . The display device of claim 5 , wherein the secondary optics define a pixel emission region having a size or shape corresponding with a size or shape of the light extraction features.

7 . The display device of claim 3 , wherein the secondary optics comprises a diffuse light guide panel.

8 . The display device of claim 7 , wherein the diffuse light guide panel defines an interpixel region between each pixel of the display device and prevents interpixel cross talk.

9 . The display device of claim 8 , wherein the interpixel region comprises a gap, and the gap is at least partially filled with one or more of a dielectric material and a reflective material.

10 . The display device of claim 3 , wherein the secondary optics include light turning optics integrated with light guide panels.

11 . The display device of claim 1 , wherein each ILED array chip has a monolithic structure.

12 . The display device of claim 1 , wherein the plurality of ILED emitters on each ILED array chip are configured to emit light of a color.

13 . The display device of claim 12 , wherein the color is one of red, green and blue.

14 . The display device of claim 1 , wherein the plurality of ILED emitters on each ILED array chip are configured in a 2×2 matrix.

15 . The display device of claim 1 , wherein the ILED array chips are one of square, rectangular, triangular, circular and polygonal in shape.

16 . The display device of claim 1 , wherein each of the plurality of ILED emitters on each ILED array chip are mounted at a corner of the ILED array chip.

17 . The display device of claim 1 , wherein the ILED emitters on each ILED array chip are mounted on a transparent carrier to emit light that propagates through the transparent carrier.

18 . The display device of claim 1 , wherein the ILED emitters comprise micro ILED emitters.

19 . The display device of claim 1 , wherein each ILED array chip includes a substrate.

20 . An image generator for a display device, comprising:
inorganic light emitting diode (ILED) array chips arranged to form pixels of the display device, each ILED array chip including a plurality of ILED emitters each providing a subpixel for a different pixel of the display device, the ILED array chips arranged such that each pixel of the display device includes an ILED emitter from each of a plurality of adjacent ILED array chips.

Assignees

• Facebook Tech Llc

Inventors

• Henry William
• Hughes Padraig
• O'Keeffe Joseph

Classifications

• H10W90/00 Primary

  Package configurations · CPC title

• H01L33/58

  Electricity · mapped topic

• H01L33/10

  Electricity · mapped topic

• H01L33/60

  Electricity · mapped topic

• H01L27/156

  Electricity · mapped topic