Colour ILED Display on Silicon

Patent metadata

Field	Value
Publication number	US-2020126477-A1
Application number	US-201916675004-A
Country	US
Kind code	A1
Filing date	Nov 5, 2019
Priority date	Jul 31, 2014
Publication date	Apr 23, 2020
Grant date	—

Abstract

A method of fabricating an image generator for use in a display, the method comprising: fabricating a plurality of discrete ILED array chips comprising a plurality of ILED emitters configured to produce light having the same wavelength, and wherein each of the plurality of ILED array chips is configured to produce light having one of a plurality of wavelengths; positioning the plurality of discrete ILED array chips on a carrier substrate such that a plurality of ILED emitters from adjacent chips form a pixel of a display; and bonding a first surface of the plurality of ILED array chips to a driver backplane such that electrical contacts of the plurality of ILED array chips are in electrical communication with the driver backplane, wherein the driver backplane comprises electronics for driving the ILED array chips.

First claim

1 . A display, comprising:
inorganic light emitting diode (ILED) arrays configured to produce light having different wavelengths, each ILED array including ILED emitters configured to produce light having the same wavelength; and chips having discrete control electronics, each of the chips being interconnected to a respective one of the ILED arrays, wherein a pixel of the display is formed with a plurality of ILED emitters of different wavelengths from adjacent ILED arrays.

2 . The display of claim 1 , wherein the ILED arrays include a first ILED array including first ILED emitters configured to produce a red light, a second array ILED array including second ILED emitters configured to produce a green light, and a third ILED array including third ILED emitters configured to produce a blue light.

3 . The display of claim 1 , wherein the ILED emitters of each ILED array are individually addressable.

4 . The display of claim 1 , wherein the discrete control electronics include complementary metal-oxide-semiconductor (CMOS) circuitry or thin-film transistor (TFT) circuitry.

5 . The display of claim 1 , wherein the discrete control electronics include an active backplane.

6 . The display of claim 1 , wherein at least one IED emitter of an ILED array includes semiconductor material including one of:
gallium nitride (GaN); gallium phosphide (GaP); or gallium arsenide (GaAs).

7 . The display of claim 1 , wherein the ILED arrays are bonded to the chips such that electrical contacts of the ILED arrays are in electrical communication with the control electronics for driving the ILED arrays.

8 . The display of claim 1 , wherein the ILED emitters of each ILED array include micro ILED emitters.

9 . The display of claim 1 , wherein each ILED emitter of each ILED array includes a reflective mesa structure for reflecting generated light at an angle such that the generated light escapes the ILED emitter.

10 . The display of claim 1 , further comprising a carrier substrate facing light emitting surfaces of the ILED arrays.

11 . The display of claim 10 , wherein the carrier substrate comprises one or more optical components configured to manipulate light emitted from the ILED arrays.

12 . The display of claim 1 , wherein the chips each include a rectangular, triangular, or hexagonal shape.

13 . The display of claim 1 , wherein each ILED emitter of each ILED array includes semiconductor epitaxial layer shaped into a mesa structure and an active light emitting layer in the mesa structure.

14 . The display of claim 13 , wherein the mesa structure includes a truncated top at a side opposite to a light emitting surface of the ILED emitter.

15 . The display of claim 1 , wherein two adjacent pixels of the display each includes an ILED emitter from an ILED array.

16 . The display of claim 1 , wherein ILED emitters of an ILED array are located at corners of a chip interconnected with the ILED array.

17 . The display of claim 1 , wherein the pixel is formed with at least two ILED emitters from each of the adjacent ILED arrays.

18 . The display of claim 1 , wherein p-contacts of the plurality of ILED emitters from the adjacent ILED arrays that form the pixel are connected to each other

19 . The display of claim 18 , wherein the n-contacts of the ILED emitters of each ILED array are connected to each other.

20 . The display of claim 18 , wherein the n-contacts of the ILED emitters of each ILED array are individually addressable.

Assignees

• Facebook Tech Llc

Inventors

• Henry William
• Hughes Padraig
• O'Keeffe Joseph

Classifications

• G09G3/32 Primary

  semiconductive, e.g. using light-emitting diodes [LED] · CPC title

• G09F9/302

  characterised by the form or geometrical disposition of the individual elements · CPC title

• G09G3/2003

  Display of colours (specific for liquid crystal displays G09G3/3607) · CPC title

• H01L25/167

  Electricity · mapped topic

• H01L2933/0066

  Electricity · mapped topic