US2020083280A1PendingUtilityA1

Top emission microled display and bottom emission microled display and a method of forming the same

58
Assignee: PRILIT OPTRONICS INCPriority: Sep 11, 2018Filed: Sep 11, 2018Published: Mar 12, 2020
Est. expirySep 11, 2038(~12.2 yrs left)· nominal 20-yr term from priority
Inventors:Biing-Seng WuChao-Wen Wu
H10W 90/00G03F 7/0007G09G 3/32G09G 3/2003H01L 33/62H01L 33/36H01L 33/58H01L 27/156H10H 20/857H10H 20/855H10H 20/83H10H 29/142
58
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Claims

Abstract

A microLED display includes a first main substrate, micrLEDs disposed above the first main substrate, a first light blocking layer disposed above the first main substrate to define emission areas, a light guiding layer disposed in the emission areas, and a plurality of connecting structures disposed in the emission areas respectively and electrically connected with the microLEDs.

Claims

exact text as granted — not AI-modified
1 . A top emission micro light-emitting diode (microLED) display, comprising:
 a first main substrate;   a bottom common electrode layer disposed on a top surface of the first main substrate;   a plurality of microLEDs disposed on the bottom common electrode layer;   a first light blocking layer disposed on the bottom common electrode layer to define a plurality of emission areas;   a light guiding layer disposed in the emission areas; and   a plurality of connecting structures disposed in the emission areas respectively and electrically connected with the microLEDs.   
     
     
         2 . The display of  claim 1 , wherein the connecting structures have a same pattern. 
     
     
         3 . The display of  claim 1 , wherein the connecting structures comprise transparent material. 
     
     
         4 . The display of  claim 1 , wherein the connecting structures comprise opaque material. 
     
     
         5 . The display of  claim 1 , wherein the first light blocking layer comprises black matrix. 
     
     
         6 . The display of  claim 1 , wherein the first light blocking layer has a thickness greater than the light guiding layer. 
     
     
         7 . The display of  claim 1 , wherein the first light blocking layer has a thickness less than the light guiding layer, the first light blocking layer and the light guiding layer partially overlap each other, and the first light blocking layer is partially covered with the light guiding layer. 
     
     
         8 . The display of  claim 1 , wherein each said emission area corresponds to one microLED. 
     
     
         9 . The display of  claim 1 , wherein each said emission area corresponds to a red microLED, a green microLED and a blue microLED. 
     
     
         10 . The display of  claim 1 , wherein a red microLED, a green microLED and a blue microLED in the emission area respectively correspond to the connecting structures with a same pattern. 
     
     
         11 . The display of  claim 1 , wherein the connecting structures are entirely formed in the emission areas. 
     
     
         12 . The display of  claim 1 , further comprising:
 a blocking substrate disposed above the first main substrate and the first light blocking layer; and   a second light blocking layer formed on a bottom surface of the blocking substrate, the second light blocking layer covering areas other than emission areas and the first light blocking layer;   wherein the first light blocking layer surrounding the emission area has a frame shape, the first light blocking layer and the second light blocking layer partially overlapping each other.   
     
     
         13 . The display of  claim 12 , wherein an aperture of the first light blocking layer is different from an aperture of the second light blocking layer. 
     
     
         14 . The display of  claim 12 , wherein the second light blocking layer comprises black matrix. 
     
     
         15 . The display of  claim 12 , wherein the blocking substrate comprises transparent material. 
     
     
         16 . The display of  claim 12 , further comprising:
 a second main substrate disposed at a same level as the first main substrate, the first main substrate and the second main substrate corresponding to distinct microLED displays respectively, and the first light blocking layer being disposed above the first main substrate and the second main substrate;   wherein the first main substrate and the second main substrate correspond to the same blocking substrate, and the first light blocking layer of the first main substrate and the second light blocking layer of the second main substrate correspond to the same second light blocking layer at a joint of the first main substrate and the second main substrate.   
     
     
         17 . The display of  claim 12 , further comprising a shielding layer disposed between the blocking substrate and the second light blocking layer for blocking electromagnetic interference. 
     
     
         18 . The display of  claim 17 , wherein the shielding layer comprises transparent material. 
     
     
         19 . The display of  claim 1 , the microLED is a rectangle and is disposed longitudinally. 
     
     
         20 - 30 . (canceled) 
     
     
         31 . A bottom emission microLED display, comprising:
 a first main substrate;   a plurality of microLEDs disposed above the first main substrate;   a first light blocking layer disposed above the first main substrate to define a plurality of emission areas;   a light guiding layer disposed in the emission areas;   a plurality of connecting structures disposed in the emission areas respectively and electrically connected with the microLEDs; and   a top common electrode layer disposed above the first light blocking layer and the microLEDs.   
     
     
         32 . The display of  claim 31 , wherein the connecting structures have a same pattern. 
     
     
         33 . The display of  claim 31 , wherein the connecting structures comprise transparent material. 
     
     
         34 . The display of  claim 31 , wherein the connecting structures comprise opaque material. 
     
     
         35 . The display of  claim 31 , wherein the first light blocking layer comprises black matrix. 
     
     
         36 . The display of  claim 31 , wherein the first light blocking layer has a thickness greater than the light guiding layer. 
     
     
         37 . The display of  claim 31 , wherein the first light blocking layer has a thickness less than the light guiding layer, the first light blocking layer and the light guiding layer partially overlap each other, and the first light blocking layer is partially covered with the light guiding layer. 
     
     
         38 . The display of  claim 31 , wherein each said emission area corresponds to one microLED. 
     
     
         39 . The display of  claim 31 , wherein each said emission area corresponds to a red microLED, a green microLED and a blue microLED. 
     
     
         40 . The display of  claim 31 , wherein a red microLED, a green microLED and a blue microLED in the emission area respectively correspond to the connecting structures with a same pattern. 
     
     
         41 . The display of  claim 31 , wherein the connecting structures are entirely formed in the emission areas. 
     
     
         42 . The display of  claim 31 , further comprising a shielding layer disposed between the first main substrate and the first light blocking layer for blocking electromagnetic interference. 
     
     
         43 . The display of  claim 42 , wherein the shielding layer comprises transparent material. 
     
     
         44 . The display of  claim 31 , further comprising:
 a blocking substrate disposed below the first main substrate; and   a second light blocking layer formed on a top surface of the blocking substrate, the second light blocking layer covering areas other than emission areas and the first light blocking layer;   wherein the first light blocking layer surrounding the emission area has a frame shape, the first light blocking layer and the second light blocking layer partially overlapping each other.   
     
     
         45 . The display of  claim 44 , wherein an aperture of the first light blocking layer is different from an aperture of the second light blocking layer. 
     
     
         46 . The display of  claim 44 , wherein the second light blocking layer comprises black matrix. 
     
     
         47 . The display of  claim 44 , wherein the blocking substrate comprises transparent material. 
     
     
         48 . The display of  claim 44 , further comprising a shielding layer disposed between the blocking substrate and the second light blocking layer for blocking electromagnetic interference. 
     
     
         49 . The display of  claim 48 , wherein the shielding layer comprises transparent material. 
     
     
         50 . The display of  claim 44 , further comprising:
 a second main substrate disposed at a same level as the first main substrate, the first main substrate and the second main substrate corresponding to distinct microLED displays respectively, and the first light blocking layer being disposed above the first main substrate and the second main substrate;   wherein the first main substrate and the second main substrate correspond to the same blocking substrate, and the first light blocking layer of the first main substrate and the second light blocking layer of the second main substrate correspond to the same second light blocking layer at a joint of the first main substrate and the second main substrate.   
     
     
         51 . The display of  claim 50 , further comprising a shielding layer disposed between the second main substrate and the first light blocking layer for blocking electromagnetic interference. 
     
     
         52 . The display of  claim 51 , wherein the shielding layer comprises transparent material. 
     
     
         53 . The display of  claim 31 , the microLED is a rectangle and is disposed longitudinally. 
     
     
         54 . The display of  claim 31 , further comprising an anti-floodlight layer disposed on a bottom surface of the first main substrate and disposed between adjacent microLEDs or pixels. 
     
     
         55 . The display of  claim 54 , wherein the anti-floodlight layer is disposed on the first main substrate opposite the first light blocking layer. 
     
     
         56 . The display of  claim 54 , wherein the anti-floodlight layer comprises black matrix. 
     
     
         57 . The display of  claim 56 , wherein the black matrix comprises chromium/chromium oxide, black resin or ink-jet. 
     
     
         58 - 68 . (canceled)

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