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

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Light(Advanced Manufacturing) 2022年第3期3卷 197-204页

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 School of Advanced Materials Shenzhen Graduate SchoolPeking UniversityShenzhen 518055China Hangzhou Institute for Advanced Study University of Chinese Academy of SciencesHangzhou 310024China Tsinghua-Berkeley Shenzhen Institute(TBSI) Tsinghua Shenzhen International Graduate SchoolTsinghua UniversityShenzhen 518055China TCL China Star Optoelectronics Technology Co. Ltd.(CSOT)Shenzhen 518132China

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 *** this study,potential factors that contribute to the crosstalk effect were systematically *** 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 *** careful investigations,a press-assisted moulding technique was demonstrated to be an effective approach of fabricating the ***,experimental observations further revealed that residual black LBM on the surface of micro-LEDs severely reduces the brightness,thereby compromising the display *** problem was successfully addressed by employing a plasma etching technique to efficiently extract the trapped ***,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 *** 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

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crosstalk in polymer microelectrode arrays

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Nano Research 2021年第9期14卷 3240-3247页

作者： Yi Qiang Wen Gu Zehua Liu Shanchuan Liang Jae Hyeon Ryu Kyung Jin Seo Wentai Liu Hui Fang Department of Electrical and Computer Engineering Northeastern UniversityBostonMA 02115USA Department of Bioengineering University of CaliforniaLos AngelesLos AngelesCA 90095USA Department of Bioengineering Northeastern UniversityBostonMA 02115USA

Thin-film polymer microelectrcxje arrays(MEAs)facilitate the high-resolution neural recording with its superior mechanical ***,the densely packed electrodes and interconnects along with the ultra-thin polymeric encapsulation/substrate layers give rise to non-negligible crosstalk,which could result in severe interference in the neural signal *** to the lack of standardized characterization or modeling of crosstalk in neural electrode arrays,to date,crosstalk in polymer MEAs remains poorly *** this work,the crosstalk between two adjacent polymer microelectrodes is measured experimentally and modeled using equivalent ***,this study demonstrated a two-well measuring platform and systematically characterized the crosstalk in polymer microelectrodes with true isolation of the victim channel and precise control of its grounding condition.A simple,unified equation from detailed circuit modeling was proposed to calculate the crosstalk in different *** element analysis(FEA)analysis was conducted further to explore the crosstalk in more aggressively scaled polymer electrode *** addition to standardizing neural electrode array crosstalk characterization,this study not only reveals the dependence of the crosstalk in polymer MEAs on a variety of key device parameters but also provides general guidelines for the design of thin polymer MEAs for high-quality neural signal recording.

关键词： crosstalk effect flexible microelectrodes equivalent circuit modelling finite element analysis polymer

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Development of short prototype of dual aperture quadrupole magnet for CEPC ring

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Nuclear Science and Techniques 2023年第7期34卷 148-158页

作者： Mei Yang Fu-San Chen Ya-Feng Wu Zhuo Zhang Bao-Gui Yin Bin Na Zhan-Jun Zhang Institute of High Energy Physics Chinese Academy of SciencesBeijing 10049China Key Laboratory of Particle Acceleration Physics and Technology Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China University of Chinese Academy of Sciences Beijing 100049China Beijing HE-Racing Technology Co. Ltd.Beijing 1000049China

Main quadrupole magnets are critical for the Circular Electron and Positron Collider(CEPC)and are specifically designed as dual aperture quadrupole(DAQ)***,the field crosstalk between the two apertures presents *** the CEPC will work at four beam energies of Z,W,Higgs and ttbar mode,the DAQ magnets will operate at four field gradients spanning from 3.18 to 12.63 T/*** first short quadrupole magnet prototype with the bore diameter of 76 mm and magnetic length of 1.0 m revealed the problems of large magnetic field harmonics and a magnetic center shift within the beam energy ***,a compensation method was proposed in this work to solve the field crosstalk *** adjusting the gap height at the middle of the two apertures,the field harmonics and magnetic center shift are significantly *** optimization,the short prototype was modified using a new *** field simulations are validated from the magnetic measurement ***,the multipole field meets the requirements of the four beam *** detailed magnetic field optimization,field harmonics adjustment,and measurement results are presented herein.

关键词： Dual aperture magnets Field measurements crosstalk effect Quadrupole magnet Field harmonics CEPC

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