Alleviating the crosstalk effect via a fine-moulded light-blocking matrix for colour-converted micro-LED display with a 122% NTSC gamut  

作　　者：Yongming Yin Zhiping Hu Muhammad Umair Ali Miao Duan Yongwei Wu Ming Liu Wenxiang Peng Jun Hou Dongze Li Xin Zhang Hong Meng 

机构地区：[1]School of Advanced Materials,Shenzhen Graduate School,Peking University,Shenzhen 518055,China [2]Hangzhou Institute for Advanced Study,University of Chinese Academy of Sciences,Hangzhou 310024,China [3]Tsinghua-Berkeley Shenzhen Institute(TBSI),Tsinghua Shenzhen International Graduate School,Tsinghua University,Shenzhen 518055,China [4]TCL China Star Optoelectronics Technology Co.,Ltd.(CSOT),Shenzhen 518132,China

出　　处：《Light(Advanced Manufacturing)》2022年第3期197-204,共8页光（先进制造）（英文）

基　　金：This work was financially supported by the Guangdong Basic and Applied Basic Research Foundation(No.2021A1515110085);Key-Area Research and Development Program of Guangdong Province(No.2019B010924003);Shenzhen Hong Kong Innovation Circle Joint R&D Project(SGDX20190918105201704);Shenzhen Fundamental Research Program(No.GXWD20201231165807007-20200810113811001);Shenzhen Science and Technology Research Grant(JCYJ20170818085627903).

摘　　要：One of the major challenges when fabricating high gamut colour-converted micro-light-emitting diodes(LEDs)displays is severe crosstalk effect among adjacent pixels because of the wide view-angle feature of micro-LED chips.In this study,potential factors that contribute to the crosstalk effect were systematically simulated.We observed that precisely filling the space between each micro-LED chip with a light blocking matrix(LBM)can be a promising solution to alleviate this risk.After careful investigations,a press-assisted moulding technique was demonstrated to be an effective approach of fabricating the LBM.Nevertheless,experimental observations further revealed that residual black LBM on the surface of micro-LEDs severely reduces the brightness,thereby compromising the display performance.This problem was successfully addressed by employing a plasma etching technique to efficiently extract the trapped light.Eventually,a top-emitting blue micro-LED-based backlight fine-moulded with a black LBM was developed and combined with red and green quantum dot colour-conversion layers for full-colour display.The colour gamut of our manufactured display prototype can cover as high as 122%that of the National Television Standards Committee.

关 键 词：Micro-LED Crosstalk effect Quantum dots Color conversion Plasma etching Fine-moulding 

分 类 号：O43[机械工程—光学工程]