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arXiv 2017年

作者： Xiao, Jiasheng Liu, Juan Han, Jian Wang, Yongtian China Beijing Engineering Research Center for Mixed Reality and Advanced Display School of Optoelectronics Beijing Institute of Technology Beijing100081 China Key Laboratory of Information System and Technology Beijing Institute of Control and Electronic Technology Beijing100038 China

Dispersion problem has always constrained the development of see-Through near-eye displays with diffractive waveguide. Here, we propose a design method and optical systems for achromatic surface microstructure composed with a triple-carved-sub-grating. The triple-carved-sub-grating with specified period is designed based on rigorous coupled wave theory, corresponding to Red, Green and Blue (RGB) wavelengths, respectively, with diffraction efficiencies of ±1st orders reach 47.5% under TE polarization. The surface microstructure with period of 18.9 is realized by integrating the three sub-gratings together, and it is verified numerically that the diffractive angle of RGB wavelengths is 35° and the crosstalk is less than 4.5% under the normal incidence of TE polarization, which imply the surface microstructure diffracts the certain RGB wavelengths achromatically. Via proper duplication it could be utilized as the combining optics of diffractive-waveguide near-eye display and head-up display because of its light and compact features. m. Copyright © 2017, The Authors. All rights reserved.

关键词： Diffraction

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DEPTH MAP CODING BASED ON VIRTUAL VIEW QUALITY

DEPTH MAP CODING BASED ON VIRTUAL VIEW QUALITY

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IEEE International Conference on Acoustics, Speech and Signal Processing

作者： Chao Yang Ping An Deyang Liu Liquan Shen Key Laboratory of Advanced Displays and System Application Ministry of Education Shanghai China

ISBN: (纸本)9781479999897

Multi-view video plus depth (MVD) is a 3D video representation. In MVD, the depth map provides the scene distance information and is used to render the virtual view through Depth Image Based Rendering (DIBR) technique. The depth map coding error will induce distortion in the rendered virtual views. This paper proposes a mathematic model that can estimate the synthesized virtual view distortion induced by depth map compression, and the model is employed to the rate distortion optimization (RDO) in the depth map coding. Based on the rendered virtual view quality, a Lagrangian optimization adjustment scheme at Coding Unit (CU) level is proposed to improve the depth map encoding efficiency. Experimental results demonstrate that the proposed method can improve the BD-PSNR of virtual view for 0.62 dB, and the encoding complexity reduces compared with the view synthesis optimization (VSO) technique in the 3D-HEVC Test Model (HTM).

关键词： Lagrangian optimization depth map distortion depth map encoding exponential model virtual view distortion

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Enhanced performance of ultraviolet organic light-emitting diode by using graphene oxide and MoO3 dual hole injection layer

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Physica Status Solidi (C) Current Topics in Solid State Physics 2017年第1-2期14卷 n/a-n/a页

作者： Liu, Liming You, Fengjiao Zheng, Qinghong Mo, Bingjie Zeng, Baoqing Wang, Honghang Zhang, Xiaowen Wei, Bin School of Physical Electronics University of Electronic Science and Technology of China Chengdu610054 China Guangxi Key Laboratory of Information Materials and School of Materials Science and Engineering Guilin University of Electronic Technology Guilin541004 China Zhongshan Branch of State Key Laboratory of Electronic Thin Films and Integrated Devices University of Electronic Science and Technology of China Zhongshan Institute Zhongshan528402 China Key Laboratory of Advanced Display and System Applications Ministry of Education Shanghai University Shanghai200072 China

A dual hole injection layer (d-HIL) composed of graphene oxide (GO) and transition metal oxide MoO3 is constructed and proven to be effectively promotes the radiance and external quantum efficiency (EQE) of ultraviolet organic light-emitting diode (UV OLED). The device with d-HIL behaves a maximum radiance of 4.7 mW/cm2 at 237.5 mA/cm2 and EQE of 1.36% at 3.75 mA/cm2, which have been enhanced by 27% and 19%, respectively, in comparison with the coun- terpart using conventional MoO3single HIL. The ultraviolet photoelectron spectroscopy elucidates that GO/MoO3 modification to the greatest extent enhances work function. The current-voltage characteristics and impedance spectroscopy of Hole-only devices clarify that GO/MoO3 d-HIL considerably promotes hole injection capacity. Our results indicate that the d-HIL of GO/MoO3 paves a way for constructing efficient UV OLED. © 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

关键词： Transition metals

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Design of PID temperature control system based on STM32

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IOP Conference Series: Materials Science and Engineering 2018年第7期322卷

作者： Jianxin Zhang Hailin Li Kai Ma Liang Xue Bianhua Han Yuemeng Dong Yue Tan Chengru Gu Tianjin Key Laboratory of Optoelectronic Detection Technology and Systems Tianjin Polytechnic University Tianjin China Tianjin Key Laboratory of Advanced Electrical Engineering and Energy Technology Tianjin Polytechnic University Tianjin China Engineering Research Center of High Power Semiconductor Lighting Application System Education Department Tianjin Polytechnic University Tianjin China State Key Laboratory of Hollow Fiber Membrane Materials and Processes Tianjin Polytechnic University Tianjin China

A rapid and high-accuracy temperature control system was designed using proportional-integral-derivative (PID) control algorithm with STM32 as micro-controller unit (MCU). The temperature control system can be applied in the fields which have high requirements on the response speed and accuracy of temperature control. The temperature acquisition circuit in system adopted Pt1000 resistance thermometer as temperature sensor. Through this acquisition circuit, the monitoring actual temperature signal could be converted into voltage signal and transmitted into MCU. A TLP521-1 photoelectric coupler was matched with BD237 power transistor to drive the thermoelectric cooler (TEC) in FTA951 module. The effective electric power of TEC was controlled by the pulse width modulation (PWM) signals which generated by MCU. The PWM signal parameters could be adjusted timely by PID algorithm according to the difference between monitoring actual temperature and set temperature. The upper computer was used to input the set temperature and monitor the system running state via serial port. The application experiment results show that the temperature control system is featured by simple structure, rapid response speed, good stability and high temperature control accuracy with the error less than ±0.5°C.

关键词：

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Improved Out-coupling emission of organic Light-emitting diodes by employing longitudinal wave guides

Improved Out-coupling emission of organic Light-emitting dio...

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International Conference on Material Science and Engineering（ICMSE 2016）

作者： Yang Lin Shiqi Liu Weiling Li Guo Chen Bin Wei Key Laboratory of Advanced Display and System Applications Ministry of Education Shanghai University

We improved the current efficiencies of Organic Light-emitting diodes from 50 cd/A to 77.7and 65.4 cd/A by employing Ag-thin-film and Al2O3-thin-film longitudinal wave guides with the same device structures, respectively, which was attributed to the recycle use of the internal mode because the reflection of the thin-film longitude wave guides. In addition, the introduction of these wave guides exported slight influence on the spectra which was resulted from mode selection by the micro-cavity consisting of ITO and organic layers.

关键词： Improved Out-coupling emission of organic Light-emitting diodes by employing longitudinal wave guides

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Eye-hand coordination based human-computer interaction

International Journal of Signal Processing, Image Processing...

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International Journal of Signal Processing, Image Processing and Pattern Recognition 2016年第10期9卷 205-216页

作者： Wei, Kang Guan, Ye-Peng School of Communication and Information Engineering Shanghai University China Key Laboratory of Advanced Displays and System Application Ministry of Education China

Human-computer interaction (HCI) has great interactive applications in many fields. A novel eye-hand coordination based HCI approach has been proposed. According to the fact that the eye gazing starts prior to the hand movement and reaches the target in advance, an eye-hand coordination model in a non-contact way is constructed by facial orientation and skeletal joints of hand. Both temporal median filtering and moving average filter strategies are developed to overcome some fluctuation influences during HCI. The diversity of interactive habits among multiple users is considered in an ordinary hardware from a crowded scene without any hypothesis for the scenario contents in advance. Comparative comparisons with state-of-the-arts have highlighted the superior performance of the proposed approach. © 2016 SERSC.

关键词： Human computer interaction

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Exciplex formation and electroluminescent absorption in ultraviolet organic light-emitting diodes

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Chinese Physics B 2015年第2期24卷 253-258页

作者：张琪张浩张小文徐韬魏斌 School of Materials Science and Engineering & Key Laboratory of Advanced Display and System Applications Ministry of EducationShanghai University Guangxi Key Laboratory of Information Materials Guilin University of Electronic Technology

We investigated the formation of exciplex and electroluminescent absorption in ultraviolet organic light-emitting diodes（UV OLEDs） using different heterojunction *** is found that an energy barrier of over 0.3 eV between the emissive layer（EML） and adjacent transport layer facilitates exciplex *** electron blocking layer effectively confines electrons in the EML,which contributes to pure UV emission and enhances *** change in EML thickness generates tunable UV emission from 376 nm to 406 *** addition,the UV emission excites low-energy organic function layers and produces photoluminescent *** UV OLED,avoiding the exciplex formation and averting light absorption can effectively improve the purity and efficiency.A maximum external quantum efficiency of 1.2%with a UV emission peak of 376 nm is realized.

关键词： exciplex tunable UV emission electroluminescent absorption

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Parallax-aware local alignment for image stitching under large occlusion/disocclusion

Parallax-aware local alignment for image stitching under lar...

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IEEE Visual Communications and Image Processing (VCIP)

作者： Yangxin Wang Kai Li Ping An Liquan Shen Xuemei Zou School of Communication and Information Engineering Shanghai University Shanghai China Ministry of Education Key Laboratory of Advanced Displays and System Application Shanghai China

ISBN: (纸本)9781509053179

This paper presents a parallax-aware image stitching approach under large occlusion/disocclusion. Different from previous research, we explore the image stitching issue in a parallax-aware perspective via local alignment. Specifically, we first label each feature point with a probability of being large parallax by developing a graph-based optimization framework. Afterwards, an integer programming model is built to pick out a group of feature matches free from parallax in a local region. Finally, by enforcing a stitching seam passing through such a locally aligned area, we are able to generate a high-quality stitching result under large parallax. Experimental results demonstrate the effectiveness and superiority of the proposed parallax-aware approach.

关键词： Optimization Transforms Cameras Labeling Linear programming Image color analysis Feature extraction

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Performance enhancement of merge pin schottky diode with graphene films as heat sink by ANSYS simulation

Performance enhancement of merge pin schottky diode with gra...

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China International Forum on Solid State Lighting (SSLCHINA)

作者： Piaopiao He Zhangfu Chen Lianqiao Yang Jianhua Zhang Luqiao Yin Tingting Nan School of Material Science and Engineering Shanghai University Shanghai China Key Laboratory of Advanced Display and System Applications Ministry of Education Zhabei Shanghai China

ISBN: (纸本)9781509056125

In this paper, we simulate graphene on the surface of substrate, using interconnection metallization to connect merge pin schottky (MPS) power diode chip and substrate, then build a thermal model of the device, and perform the finite-element analysis with ANSYS software. In recent years, graphene has attracted a large amount of interest because of its outstanding electric conductivity, ultrahigh thermal conductivity and large specific surface area. Therefore, if graphene films are used as heat sink, heat will diffuse through graphene surface at breakneck speeds, solving the heat accumulation problem of the device. In this work, we simulate the heat dissipation effect of the device with graphene films or without graphene films. Then, we change the thickness of graphene films, contact area between graphene films and heat dissipation substrate, and contact area between interconnection metallization and graphene films.

关键词： Graphene Heating Conductivity Thermal conductivity Films Heat sinks Substrates

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Erratum to: The Influence of Hafnium Doping on Density-of-States in Zinc Oxide Thin-Film Fransistors Deposited Via Atomic Layer Deposition

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Nanoscale research letters 2017年第1期12卷 172页

作者： Xingwei Ding Cunping Qin Jiantao Song Jianhua Zhang Xueyin Jiang Zhilin Zhang Key Laboratory of Advanced Display and System Application Ministry of Education Shanghai University 149 Yanchang Road Shanghai Jingan District 200070 People's Republic of China. School of Mechatronics and Automation Shanghai University Shanghai 200072 China. Key Laboratory of Advanced Display and System Application Ministry of Education Shanghai University 149 Yanchang Road Shanghai Jingan District 200070 People's Republic of China. dxwshu@***. School of Mechatronics and Automation Shanghai University Shanghai 200072 China. dxwshu@***. Department of Materials Science Shanghai University Shanghai 200072 China.

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