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

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 total 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.

1 . A display device, comprising:
 a first inorganic light emitting diode (ILED) chip of a polygon shape, the first ILED chip including at least two first ILED emitters at corners of the first ILED chip, each of the at least two first ILED emitters including an area of ILED emitter material configured to emit light; and   a second ILED chip of the same polygon shape next to the first ILED chip, the second ILED chip including at least two second ILED emitters at corners of the second ILED chip, each of the at least two second ILED emitters including an area of ILED emitter material configured to emit light, one of the at least two second ILED emitters in conjunction with one of the at least two first ILED emitters forming a display pixel in the display device.   
     
     
         2 . The display device of  claim 1 , wherein the polygon shape is a square. 
     
     
         3 . The display device of  claim 2 , wherein the first ILED chip has four first ILED emitters at four corners of the first ILED chip, and the second ILED chip has four second ILED emitters at four corners of the second ILED chip. 
     
     
         4 . The display device of  claim 1 , wherein a total area of the ILED emitter material of the first ILED chip is in a range from 5% to 10% of an area of the display pixel. 
     
     
         5 . The display device of  claim 1 , wherein the at least two first ILED emitters are configured to emit light of a first color, and the at least two second ILED emitters are configured to emit light of a second color different from the first color. 
     
     
         6 . The display device of  claim 5 , wherein the display pixel further comprises a third ILED emitter of a third ILED chip and a fourth ILED emitter of a fourth ILED chip. 
     
     
         7 . The display device of  claim 6 , wherein the first ILED chip, the second ILED chip, the third ILED chip, and the fourth ILED chip are placed in a 2×2 matrix. 
     
     
         8 . The display device of  claim 1 , wherein each of the at least two first ILED emitters is individually addressable, and each of the at least two second ILED emitters is individually addressable. 
     
     
         9 . The display device of  claim 1 , wherein the first ILED chip comprises a substrate with a semiconductor epitaxial layer, wherein the semiconductor epitaxial layer in the at least two first LED emitters is shaped as a mesa with a truncated top. 
     
     
         10 . The display device of  claim 9 , wherein the first ILED chip further comprises a light guide panel onto which the first ILED chip and the second ILED chip emit light. 
     
     
         11 . The display device of  claim 10 , further comprising secondary optics that mix light from one of the at least two second ILED emitters and light from one of the at least two first ILED emitters that form the display pixel. 
     
     
         12 . The display device of  claim 1 , wherein the display device is mounted in a flip-chip configuration. 
     
     
         13 . An inorganic light emitting diode (ILED) chip, comprising:
 a first ILED emitter at a first corner of the ILED chip and configured to emit light of a color;   a second ILED emitter at a second corner of the ILED chip and configured to emit light of the color, the second ILED emitter independently addressable from the first ILED emitter;   a third ILED emitter at a third corner of the ILED chip and configured to emit light of the color, the third ILED emitter independently addressable from the first ILED emitter and the second ILED emitter, and   a fourth ILED emitter at a fourth corner of the ILED chip and configured to emit light of the color, the fourth ILED emitter independently addressable from the first ILED emitter, the second ILED emitter and the third ILED emitter;   wherein at least one of the first, second third, fourth ILED emitters forming a display pixel with an emitter of another ILED chip.   
     
     
         14 . The ILED chip of  claim 13 , wherein the ILED chip is shaped in a square. 
     
     
         15 . The ILED chip of  claim 13 , comprising a substrate with a semiconductor epitaxial layer, wherein each portion of the semiconductor epitaxial layer in the first ILED emitter, the second ILED emitter, the third ILED emitter, and the fourth ILED is shaped as a mesa with a truncated top.