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Enhancing heat transfer at the micro-scale using elastic turbulence 被引量:2
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作者 R.D.Whalley W.M.Abed +1 位作者 D.J.C.Dennis R.J.Poole 《Theoretical & Applied Mechanics Letters》 CAS CSCD 2015年第3期103-106,共4页
Small concentrations of a high-molecular-weight polymer have been used to create so-called "elastic tur- bulence" in a micro-scale serpentine channel geometry. It is known that the interaction of large elastic stres... Small concentrations of a high-molecular-weight polymer have been used to create so-called "elastic tur- bulence" in a micro-scale serpentine channel geometry. It is known that the interaction of large elastic stresses created by the shearing motion within the fluid flow with streamline curvature of the serpentine geometry leads initially to a purely-elastic instability and then the generation of elastic turbulence. We show that this elastic turbulence enhances the heat transfer at the micro-scale in this geometry by up to 300% under creeping flow conditions in comparison to that achieved by the equivalent Newtonian fluid flow. 展开更多
关键词 Elastic turbulence Viscoelasticity Serpentine channel micro-mixing Heat transfer
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A Novel Micro-hole Electrode Used to Investigate Electron Transfer Reactions at ITIES
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作者 Dong Ping ZHAN Bing Liang WU 《Chinese Chemical Letters》 SCIE CAS CSCD 2002年第3期273-276,共4页
A novel micro-hole electrode was fabricated to investigate the electron transfer reaction at the interface between two immiscible electrolyte solutions (ITIES). The electron transfer reaction between ferro/ferricyani... A novel micro-hole electrode was fabricated to investigate the electron transfer reaction at the interface between two immiscible electrolyte solutions (ITIES). The electron transfer reaction between ferro/ferricyanide in aqueous phase (W) and ferrocene in 1, 2-dichloroethane (O) phase was studied as a test experiment. The results showed that the diffusion coefficient obtained from the micro-hole electrode was consistent with that obtained at macro-interface. Due to its simplicity and the very small IR drop it will be a useful tool for the study of ITIES systems. 展开更多
关键词 micro-hole electrode electron transfer ITIES.
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Impact of Melting Heat Transfer and Variable Characteristics on an MHD Non-Newtonian Shear-Thinning Fluid Flow with Gyrotactic Microorganisms over a Nonlinear Stretched Surface
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作者 Muhammad Ramzan Naila Shaheen 《Journal of Applied Mathematics and Physics》 2023年第8期2461-2471,共11页
The objective of this work is to examine how temperature-dependent thermal conductivity and concentration-dependent molecular diffusion affect Reiner-Philippoff nanofluid flow past a nonlinear stretching sheet. At the... The objective of this work is to examine how temperature-dependent thermal conductivity and concentration-dependent molecular diffusion affect Reiner-Philippoff nanofluid flow past a nonlinear stretching sheet. At the interface of the elongated surface zero-mass flux and melting heat condition are incorporated. The formulated mathematical problem is simplified by implementing suitable similarity transformations. For the numerical solution bvp4c is utilized. The parameters emerging in the model are discussed versus allied profiles through graphical illustrations. It is perceived that the velocity of the fluid decays on incrementing the Bingham number. The gyrotactic microorganism profile declines on amplifying the Peclet number. The validation of the proposed model is also added to this study. . 展开更多
关键词 Reiner-Philippoff Nanofluid Nonlinear Stretching Sheet Melting Heat transfer Gyrotactic micro-Organisms
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Heat Transfer Characteristics of Square Micro Pin Fins under Natural Convection
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作者 Naoko Matsumoto Toshio Tomimura Yasushi Koito 《Journal of Electronics Cooling and Thermal Control》 2014年第3期59-69,共11页
In order to comply with the recent demand for downsizing of the electric equipment, the minia- turization and the improvement in heat transfer performance of a heat sink under natural air-cooling are increasingly requ... In order to comply with the recent demand for downsizing of the electric equipment, the minia- turization and the improvement in heat transfer performance of a heat sink under natural air-cooling are increasingly required. This paper describes the experimental and numerical investigations of heat sinks with miniature/micro pins and the effect of the pin size, pin height and the number of pins on heat transfer characteristics of heat sinks. Five types of basic heat sink models are investigated in this study. The whole heat transfer area of heat sinks having the different pin size, pin height and the number of pins respectively is kept constant. From a series of experiments and numerical analyses, it has been clarified that the heat sink temperature rises with increase in the number of pins. That is, the heat sink with miniaturized fine pins showed almost no effect on the heat transfer enhancement. This is because of the choking phenomenon occurred in the air space among the pin fins. Reflecting these results, it is confirmed that the heat transfer coefficient reduces with miniaturization of pins. Concerning the effects of the heat transfer area on the heat sink performance, almost the same tendency has been observed in other three series of large surface area, that is, higher pin height. Furthermore as a result of studying non-dimensional convection heat transfer performance, it was found that the relation between the Nusselt number (Nu) and the Rayleight number (Ra) is given by Nu = 0.16 Ra0.52. 展开更多
关键词 Natural Air-Cooling HEAT SINK micro PIN FIN HEAT transfer Performance Experiment Numerical Analysis
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Mini/Micro LED巨量转移关键技术与装备研究现状 被引量:1
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作者 汤晖 廖智燊 +3 位作者 魏玉章 林志杭 董志强 张晓辉 《振动.测试与诊断》 EI CSCD 北大核心 2023年第5期839-849,1033,共12页
微型半导体发光二极管显示技术(mini/micro light emitting diode,简称Mini/Micro LED)是一种基于微型LED芯片的自发光显示技术,相较于液晶显示技术(liquid crystal display,简称LCD)和有机发光二极管显示技术(organic light‑emitting d... 微型半导体发光二极管显示技术(mini/micro light emitting diode,简称Mini/Micro LED)是一种基于微型LED芯片的自发光显示技术,相较于液晶显示技术(liquid crystal display,简称LCD)和有机发光二极管显示技术(organic light‑emitting diode,简称OLED),具有显著性能优势,被视为次世代显示技术的发展趋势。由于巨量转移技术与装备的限制,Mini/Micro LED显示设备尚未实现大规模量产。针对此问题,首先,根据现有Mini/Micro LED巨量转移工艺方法的不同工作原理,总结了3种主要工艺方法,即接触式微转印技术、非接触式激光转移技术和自组装转移技术;其次,调研了现有Mini/Micro LED巨量转移工艺方法中涉及到的技术与装备,归纳了其中的通用关键技术,即高速高精对位和视觉检测;然后,针对上述关键技术挑战,围绕Mini/Micro LED新型显示装备若干关键技术与典型设备集成开发介绍了笔者的前期研究工作;最后,讨论了实现Mini/Micro LED大规模量产中存在的问题及发展方向。 展开更多
关键词 微型半导体发光二极管显示技术 巨量转移 显示半导体装备 高速高精对位 振动抑制
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基于刻蚀处理的池沸腾传热性能实验研究
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作者 王菊萍 匡纯纯 刘妮 《原子与分子物理学报》 CAS 北大核心 2025年第3期180-188,共9页
为探究刻蚀处理铜板表面对池沸腾传热性能的改善效果,搭建了可视化实验平台,制备不同刻蚀浓度和刻蚀时间处理的表面,采用去离子水为工质,进行饱和池沸腾实验.结果表明,氨水刻蚀浓度越大,表面的换热性能越强,氨水刻蚀时间越长,表面换热... 为探究刻蚀处理铜板表面对池沸腾传热性能的改善效果,搭建了可视化实验平台,制备不同刻蚀浓度和刻蚀时间处理的表面,采用去离子水为工质,进行饱和池沸腾实验.结果表明,氨水刻蚀浓度越大,表面的换热性能越强,氨水刻蚀时间越长,表面换热性能越强.热流密度为43.2 W/cm^(2)时,0.05 mol/L氨水刻蚀4 h表面、0.05 mol/L氨水刻蚀5 h表面、0.05 mol/L氨水刻蚀8 h表面、0.03 mol/L氨水刻蚀4 h表面、0.05 mol/L氨水刻蚀4 h表面和0.10 mol/L氨水刻蚀4 h表面上的换热系数分别提高了46%、92%、105%、36%、45%、78%.此外,对其表面进行表征,结果说明了其优异的沸腾性能.刻蚀处理增强了表面粗糙度,有效面积,从而促进液体的补充,能够在较小的过热度下达到更高的临界热流密度.可视化研究结果表明,刻蚀表面具有更多的成核位点,更小的气泡离开直径和离开频率.这些结果显示出刻蚀表面强化池沸腾换热的潜力. 展开更多
关键词 池沸腾 刻蚀 传热性能 气泡动力学 微纳结构表面
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Micro-LED显示的发展现状与技术挑战 被引量:32
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作者 季洪雷 张萍萍 +3 位作者 陈乃军 王代青 张彦 葛子义 《液晶与显示》 CAS CSCD 北大核心 2021年第8期1101-1112,共12页
Micro-LED技术被认为是消费电子领域下一个世代的显示技术。尽管市场上已经有很多公司推出了基于Micro-LED显示技术的样机以及应用示范,然而Micro-LED显示技术远没有达到成熟的程度。本文从Micro-LED显示技术的历史、定义及技术挑战进... Micro-LED技术被认为是消费电子领域下一个世代的显示技术。尽管市场上已经有很多公司推出了基于Micro-LED显示技术的样机以及应用示范,然而Micro-LED显示技术远没有达到成熟的程度。本文从Micro-LED显示技术的历史、定义及技术挑战进行了综述,重点总结了Micro-LED在工程领域的技术挑战,最后对Micro-LED技术的未来发展方向进行了探讨。Micro-LED在芯片、巨量转移、全彩化等方面仍存在技术挑战,但其所展现出的高分辨、快响应、低能耗、长寿命等突出特点,能满足超小和超大显示的需求,如虚拟/增强显示和电子广告牌,展现出巨大的应用潜力,已经在学术界和工业界引起了广泛研究。 展开更多
关键词 micro-LED 巨量转移 显示技术 全彩化
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Mini/Micro LED巨量转移技术研究与发展现状 被引量:10
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作者 王伟 赵甜甜 +3 位作者 刘强 韩邦成 牛萍娟 桑建 《光学精密工程》 EI CAS CSCD 北大核心 2023年第2期183-199,共17页
对巨量转移(Mass Transfer, MT)方案和运动定位平台(Motion Positioning Platform, MPP)的研究现状及其未来发展进行了详细阐述。根据芯片转移方式,将MT方案分为精准拾取-释放技术、自组装技术、滚轴转印技术、激光剥离技术,结合芯片转... 对巨量转移(Mass Transfer, MT)方案和运动定位平台(Motion Positioning Platform, MPP)的研究现状及其未来发展进行了详细阐述。根据芯片转移方式,将MT方案分为精准拾取-释放技术、自组装技术、滚轴转印技术、激光剥离技术,结合芯片转移效率和良率,论述了国内外MT方案的发展过程。在此基础上,从平台支撑方式,详细介绍了机械构型、气浮构型、磁浮构型和混合构型的MPP结构及工作原理,考虑运动行程、运动定位精度等因素,比较了MPP性能的优劣。展望了MT方案和MPP技术的未来发展方向,指出基于微孔液气双态介质的激光剥离MT和具备周向小角度修正以及轴向微高度调节能力的“机械+磁浮”混合构型MPP是Mini/Micro LED芯片转移技术的研究重点。 展开更多
关键词 Mini/micro LED 巨量转移 运动定位平台 显示技术 转移良率
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非转移与非键合的高密度Micro-LED显示器的设计与实现 被引量:1
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作者 郑泽平 林志贤 +3 位作者 叶芸 林珊玲 严群 郭太良 《半导体光电》 CAS 北大核心 2019年第1期42-47,共6页
针对微发光二极管(Micro-LED)显示屏存在的转移和键合难题,提出一种可实现高密度Micro-LED显示屏的非转移、非键合技术设计方法,该方法直接在蓝宝石上集成显示阵列、金属布线以及驱动器。此外,还设计了一套可以实现图像数据采集、图像... 针对微发光二极管(Micro-LED)显示屏存在的转移和键合难题,提出一种可实现高密度Micro-LED显示屏的非转移、非键合技术设计方法,该方法直接在蓝宝石上集成显示阵列、金属布线以及驱动器。此外,还设计了一套可以实现图像数据采集、图像数据处理、图像显示以及显示屏散热的驱动系统。最后成功制备了分辨率为128×128的Micro-LED微显示器,并实现了16阶灰度图像的动态显示。实验结果表明,所提方法简易可行,所设计驱动系统可支持显示屏的驱动显示,并具有良好的散热解决能力。 展开更多
关键词 微发光二极管 驱动系统 转移与键合 FPGA
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基于MICRO Ⅱ的YB95A条外透明纸独立传送装置 被引量:3
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作者 周学斌 《烟草科技》 EI CAS CSCD 北大核心 2015年第6期87-90,共4页
为解决YB95A条外透明纸包装机在透明纸展开切割和传送过程中出现透明纸偏移、长度变化等问题,借鉴YB917条外透明纸包装机的透明纸传送原理,通过增加伺服电机、传感器、编码器和电控程序等,将YB95A条外透明纸传送由主传动驱动改为伺... 为解决YB95A条外透明纸包装机在透明纸展开切割和传送过程中出现透明纸偏移、长度变化等问题,借鉴YB917条外透明纸包装机的透明纸传送原理,通过增加伺服电机、传感器、编码器和电控程序等,将YB95A条外透明纸传送由主传动驱动改为伺服控制的独立传送,将独立传送装置的电控部分融于MICROⅡ控制系统,控制程序加入到MICROⅡ控制软件中,通过调整IPC(Industrial Personal Computer)的相关参数对透明纸长度和搭口位置进行调整。结果表明,透明纸传送误差由±2mm降低到±0.5mm,实现了透明纸切割长度、传送位置的自动调整;条烟废品率由20~25条/d减少到0~2条/d,有效提高了卷烟包装品质。改进后YB95A条外透明纸包装机适用于彩膜包装,满足了现代卷烟企业对包装材料多样化的需求。 展开更多
关键词 条外透明纸 包装机 编码器 伺服电机 micro Ⅱ控制系统 传送装置
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Micro LED显示技术研究进展 被引量:20
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作者 邰建鹏 郭伟玲 《照明工程学报》 2019年第1期18-25,共8页
Micro LED显示技术是一项新兴的显示技术,相比于传统液晶显示技术、硅基液晶技术(LCOS)、OLED技术,以Micro LED技术为主的Micro LED显示有着响应速度快、自主发光、对比度高、使用寿命长等优势。首先介绍了Micro LED显示阵列的原理及结... Micro LED显示技术是一项新兴的显示技术,相比于传统液晶显示技术、硅基液晶技术(LCOS)、OLED技术,以Micro LED技术为主的Micro LED显示有着响应速度快、自主发光、对比度高、使用寿命长等优势。首先介绍了Micro LED显示阵列的原理及结构;然后介绍了Micro LED显示技术驱动方式、彩色化方案,最后介绍了其关键制造技术。 展开更多
关键词 micro LED 微显示 驱动 尺寸效应 彩色化 巨量转移
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蓝光GaN基Micro-LED芯片制备及激光剥离工艺研究 被引量:8
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作者 王仙翅 潘章旭 +4 位作者 刘久澄 郭婵 李志成 龚岩芬 龚政 《半导体光电》 CAS 北大核心 2020年第2期211-216,共6页
基于半导体制造工艺,制备了尺寸为50μm×80μm的蓝光氮化镓(GaN)基MicroLED芯片。芯片的正向导通电压在2.55V左右;测试了10颗LED芯片在1mA注入电流下的电压值,得到的最大值和最小值分别为3.24和3.12V,波动幅度在4%以内。在1mA的测... 基于半导体制造工艺,制备了尺寸为50μm×80μm的蓝光氮化镓(GaN)基MicroLED芯片。芯片的正向导通电压在2.55V左右;测试了10颗LED芯片在1mA注入电流下的电压值,得到的最大值和最小值分别为3.24和3.12V,波动幅度在4%以内。在1mA的测试电流下,测试芯片的EL光谱峰值波长和半高宽分别为453和14.4nm,芯片的外量子效率可达12.38%,芯片发光均匀且亮度很大。测试结果表明,所制备的Micro-LED芯片具有优异的光电性能。此外,通过激光剥离技术,实现了Micro-LED芯片的转移。研究了激光剥离工艺对MicroLED芯片光电性能的影响,发现在优化的工艺条件下,激光剥离对芯片的光电性能几乎无影响。这些结果有助于小间距微尺寸LED芯片阵列及显示技术的研究。 展开更多
关键词 micro-LED芯片 激光剥离 芯片转移 光电性能
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Thermal performance of heat pipe with different micro-groove structures 被引量:1
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作者 白鹏飞 汤勇 +1 位作者 唐彪 陆龙生 《Journal of Central South University》 SCIE EI CAS 2008年第S2期240-244,共5页
Four kinds of micro heat pipe of trapezoidal groove wick structure with different numbers of grooves or aspect ratios were studied and compared about thermal transfer performances in order to optimize the manufacture ... Four kinds of micro heat pipe of trapezoidal groove wick structure with different numbers of grooves or aspect ratios were studied and compared about thermal transfer performances in order to optimize the manufacture of micro heat pipe with groove wick structure. The results show that these micro heat pipes have excellent performance in heat transfer; the equivalent thermal conductivity coefficient is two orders of magnitude compared with that of copper; the number and aspect ratio of grooves have a prominent effect on the performance of such thermal transfer. The optimum number of grooves is lower than 60 and the best aspect ratio is near to 1.5. The temperature and thermal transport rate are almost directly proportional relationship, but this relationship will be broken up suddenly when the critical heat flux is reached. 展开更多
关键词 HEAT PIPE micro CHANNEL ELECTRONIC HEAT DISSIPATION HEAT transfer
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Micro-Droplet Flux in Forest and its Contribution to Interception Loss of Rainfall – Theoretical Study and Field
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作者 Huaxia Yao 《Journal of Water Resource and Protection》 2010年第10期872-879,共8页
A new approach to explain forest interception was proposed by introducing micro-droplets of crushed raindrops during rainfall. The aerodynamic diffusion and transfer of both vapour and micro-droplets from canopy to up... A new approach to explain forest interception was proposed by introducing micro-droplets of crushed raindrops during rainfall. The aerodynamic diffusion and transfer of both vapour and micro-droplets from canopy to upper air were described and calculated, and proposed formulas applied to eight rainfall events at the Okunoi Experimental Station, Tokushima, Japan. Contributions from droplet transfer were 0.9-58.2 times of contributions from vapour transfer, taking a majority portion in total interception loss. Accounting only the vapour transfer or evaporation loss as estimated by Penman equation was not able to account for actual interception loss. The micro-droplet flux component took major portion in the two heavily rained events, and completely made up the interception as happened in October 2004. The droplet flux could accommodate a high interception rate, even when the air was nearly vapour-saturated and vapour flux was zero. This approach provided a new explanation to extraordinarily high interception rates. 展开更多
关键词 RAINFALL INTERCEPTION micro-Droplet transfer VAPOUR FLUX Forest CANOPY Aerodynamic
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Micro-column enhanced boiling structure and its ramification
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作者 汤勇 陆龙生 +1 位作者 袁冬 苏达士 《Journal of Central South University》 SCIE EI CAS 2008年第S2期222-227,共6页
Enhanced boiling experiments of two different enhanced structures were carried out in a thermosyphon loop evaporator chamber. One was micro-columns array structure (MCAS), which was fabricated on copper plate surface ... Enhanced boiling experiments of two different enhanced structures were carried out in a thermosyphon loop evaporator chamber. One was micro-columns array structure (MCAS), which was fabricated on copper plate surface with interaction high speed wire electrode discharge machining (HS-WEDM). The other was the ramification of MCAS, named micro-column-array and sintered-copper compound structure (MSCS), which was fabricated with sintered method on micro-column array structure. Considering the wall superheat and critical heat flux (CHF), comparisons were made between them. The results show that both MCAS and MSCS can enhance the boiling heat transfer. It is also found that the enhanced boiling heat transfer ability of MSCS is changed obviously while the porosity of the sintered copper layer is changed. 展开更多
关键词 ENHANCED BOILING micro-column STRUCTURE ENHANCED heat transfer
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基于Ⅲ族氮化物的Micro⁃LED挑战及潜在解决方案 被引量:1
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作者 Waqar AZEEM 刘召军 伏桂月 《液晶与显示》 CAS CSCD 北大核心 2023年第7期892-909,共18页
Micro-LED的发展被认为是世界上发展最快的显示技术之一,它在可见光通信应用、大型平板显示、虚拟现实及可穿戴显示、电视和照明、光遗传学和神经界面的光源等各个领域中应用广泛。尽管发展前景光明,但Micro-LED仍面临一些技术问题需要... Micro-LED的发展被认为是世界上发展最快的显示技术之一,它在可见光通信应用、大型平板显示、虚拟现实及可穿戴显示、电视和照明、光遗传学和神经界面的光源等各个领域中应用广泛。尽管发展前景光明,但Micro-LED仍面临一些技术问题需要解决,以实现大规模商业化。主要技术问题包括提高长波长LED效率、提高低电流密度下的效率、全色彩方案、巨量转移、缺陷与良率管控、修复技术和成本控制。本文重点阐述了Micro-LED面临的不同挑战及其最佳解决方案。 展开更多
关键词 micro-LED 显示技术 LED效率 巨量转移 Ⅲ族氮化物
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Numerical investigation on thermal properties of micro-pin-fin cooler
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作者 张燕 刘扬名 +1 位作者 樊靖郁 刘建影 《Journal of Shanghai University(English Edition)》 CAS 2011年第4期272-278,共7页
Micro-pin-fin cooler mounted on the power chip enables the heat removal to meet modern microsystem requirement. Carbon nanotubes (CNTs) have been proven as a potential material for micro-coolers due to the superior ... Micro-pin-fin cooler mounted on the power chip enables the heat removal to meet modern microsystem requirement. Carbon nanotubes (CNTs) have been proven as a potential material for micro-coolers due to the superior thermal conductivity, good mechanical property and so forth, and there appear various applications of CNTs in the micro-cooler technology. In the present paper, an analysis of the thermal and hydraulic characteristics of the micro-pin-fin heat sink was conducted, where air was used as the cooling medium and an impinging jet was introduced to enhance the heat transfer. Three-dimension computational fluid dynamics (CFD) simulations were carried out for micro-pin-fin coolers with various parameters, including the pin-fin size and pattern as well as the jet velocity and nozzle diameter. The flow field and thermal properties of the. micro-pin-fin heat sink were obtained, and the heat removal efficiency was evaluated. 展开更多
关键词 computational fluid dynamics (CFD) micro-cooler PIN-FIN heat transfer
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Laser-assisted deposition of Cu bumps for microelectronic packaging 被引量:1
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作者 Won-Seok CHOI Joohan KIM 《中国有色金属学会会刊:英文版》 CSCD 2012年第S3期683-687,共5页
Cu bump was transferred using a focused laser pulse for microelectronic packaging.An Nd:YAG laser pulse (maximum energy of 500 mJ;wavelength of 1064 nm;fluences of 0.4-2.1 kJ/cm2) was irradiated on a sacrificial absor... Cu bump was transferred using a focused laser pulse for microelectronic packaging.An Nd:YAG laser pulse (maximum energy of 500 mJ;wavelength of 1064 nm;fluences of 0.4-2.1 kJ/cm2) was irradiated on a sacrificial absorption layer with copper coating.The focused laser beam induced plasma between the semi-transparent donor slide and the sacrificial layer,causing a shock wave.The shock wave pressure pushed the Cu layer and transferred material to deposit a bump on substrate.A beam-shaper was used to produce uniform pressure at the interface to reduce fragmentation of the transferred material on the substrate.The calculated shock wave pressure with respect to laser fluence was 1-3 GPa.A Cu bump of diameter of 200 μm was successfully deposited at laser fluence of 0.6 kJ/cm 2.The pressure control at the sacrificial layer using a laser pulse was critical to produce a bump with less fragmentation.The technique can be applied to forming Cu bump for an interconnecting process in electronics. 展开更多
关键词 LASER induced FORWARD transfer BUMP deposition ND:YAG PULSED LASER micro system packaging beam SHAPING
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平面柔性微定位平台的设计分析与优化
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作者 桂和利 徐伟胜 +1 位作者 许添旗 曹毅 《机械传动》 北大核心 2024年第10期127-137,147,共12页
为设计具有良好静动态特性的柔性微定位平台,提出了两种基于柔性梁与圆弧形柔性铰链所组成的柔性模块的柔性运动副。首先,基于该运动副设计了新型平面2自由度微定位平台结构;其次,采用柔度矩阵法建立了平台力-位移关系及输出位移的理论... 为设计具有良好静动态特性的柔性微定位平台,提出了两种基于柔性梁与圆弧形柔性铰链所组成的柔性模块的柔性运动副。首先,基于该运动副设计了新型平面2自由度微定位平台结构;其次,采用柔度矩阵法建立了平台力-位移关系及输出位移的理论模型,基于传递矩阵法建立了平台固有频率与瞬时动力响应的理论模型,并通过有限元仿真验证了理论模型的正确性。理论研究与仿真验证表明,平台具有较高的静动态性能,其输入输出完全解耦,在0.3mm输入位移下丢失运动不超过1.8%;1阶固有频率为320.34 Hz,在0.1 s时间内动力响应与仿真趋势一致。最后,进行了平台静、动态性能的灵敏度分析和参数优化。结果表明,优化后的平台在同样驱动下丢失运动和固有频率分别优化提升了1.95%和43.9%,进一步提升了平台的动态性能。 展开更多
关键词 柔性机构 微定位平台 传递矩阵法 柔度矩阵法 参数优化
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Micro-LED显示及驱动IC技术
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作者 张丽 黄志正 +2 位作者 毕乾 张哲 樊磊 《微纳电子与智能制造》 2021年第4期24-31,共8页
Micro-LED作为微小间距显示的典型代表,是目前显示技术的研究热点,具有自发光、高效率、低功耗、高集成度以及高稳定性等诸多优点,且体积小、灵活性高、易于拆解与合并,能够应用于现有从小尺寸到大尺寸的任何显示应用场合中。市场上很... Micro-LED作为微小间距显示的典型代表,是目前显示技术的研究热点,具有自发光、高效率、低功耗、高集成度以及高稳定性等诸多优点,且体积小、灵活性高、易于拆解与合并,能够应用于现有从小尺寸到大尺寸的任何显示应用场合中。市场上很多公司推出了Micro-LED显示的样机及应用示范,但目前的Micro-LED显示技术还有较大的发展空间。本文从Micro-LED显示技术的发展历程出发,总结了Micro-LED显示技术的发展概况及面临的技术挑战,如巨量转移、全彩化等,阐述了显示原理及显示驱动框架,最后结合集创的Micro-LED驱动IC说明了目前的最新研究技术,并对MicroLED的应用及发展进行了思考与展望。 展开更多
关键词 micro-LED 高集成度 驱动架构 巨量转移 全彩化
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