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16th Annual Conference and 5th International Conference on Chinese Society of Micro-Nano Technology, CSMNT 2014

作者： Peng, Cuiyun Wei, Mengjie Huang, Rongjuan Guo, Kunping Jing, Yuelin Xu, Tao Wei, Bin School of Mechanical Engineering and Automation Shanghai University 149 Yanchang Road Shanghai200072 China Key Laboratory of Advanced Display and System Applications Ministry of Education Shanghai University 149 Yanchang Road Shanghai200072 China

ISBN: (纸本)9783038354628

We have theoretically and experimentally investigated the microcavity organic light-emitting diodes (MOLEDs) that enhanced the emission intensity and narrowed the spectra simultaneously. In this work, MOLEDs with the reflectivities of 70% and 90% have been successfully fabricated. Comparing to non-cavity OLEDs, the maximum forward electroluminescence intensity and the peak luminescence can be improved by 6.8 times and 2.2 times, respectively. The full width at half maximum could be sharply narrowed to 10 nm. The different configurations of MOLEDs with varied emitting layers have also been evaluated which fitted well with the experimental results. © (2015) Trans Tech Publications, Switzerland.

关键词： Reflection

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A novel solution-based self-assembly approach to preparing ultralong titanyl phthalocyanine sub-micron wires

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Chinese Physics B 2014年第7期23卷 655-660页

作者：朱宗鹏魏斌张建华王军 School of Materials Science and Engineering Shanghai University Key Laboratory of Advanced Display and System Applications Ministry of EducationShanghai University

Ultralong titanyl phthalocyanine （TiOPc） sub-micron wires have been synthesized by a novel solution-based self- assembly method. By using different solvents, changing the mass concentration and the solvent vapor pressure, the length and the shape of the wires can be adjusted. The mixed-phase properties of the TiOPc sub-micron wires were investigated by the ultraviolet-visible （UV-vis） absorption spectrum and X-ray diffraction. Organic transistors based on these wires were studied, which show the typical p-channel characteristics.

关键词： titanyl phthalocyanine sub-micron wire transistor solution method

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Disparity compensation based 3D holoscopic image coding using HEVC

Disparity compensation based 3D holoscopic image coding usin...

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IEEE China Summit & International Conference on Signal and Information Processing (ChinaSIP)

作者： Deyang Liu Ping An Ran Ma Liquan Shen 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)9781479919499

3D holoscopic image can provide true 3D content by reproducing the light rays of the 3D scene and is regarded as a promising technique for future 3D TV. Disparity information is paramount intrinsic characteristic of the 3D holoscopic image. In this paper, a disparity compensation based 3D holoscopic image coding algorithm using HEVC is put forward. In order to drive an authentic disparity, we expand the available area outwards in the disparity matching process instead of dividing the current coding block into four parts. Experimental results demonstrate that the proposed method can obtain considerable gains over original HEVC intra-prediction and the classical TMP algorithm with acceptable complexity increasing compared to original HEVC standard.

关键词： Three-dimensional displays Image coding Encoding Video coding Imaging Standards Image reconstruction

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Pure blue and white light electroluminescence in a multilayer organic light-emitting diode using a new blue emitter

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Chinese Physics B 2014年第7期23卷 727-731页

作者：魏娜郭坤平周朋超于建宁魏斌张建华 School of Materials Science and Engineering Shanghai University Key Laboratory of Advanced Display and System Applications of Ministry of Education Shanghai University

We characterized the 6,12-bis{[N-（3,4-dimethylphenyl）-N-（2,4,5-trimethylphenyl）]amino} chrysene （BmPAC）, which has been proven to be a blue fluorescent emission with high EL efficiency. The blue fluorescent device exhibits good performance with an external quantum efficiency of 5.8% and current efficiency of 8.9 cd/A, respectively. Using BmPAC, we also demonstrate a hybrid phosphorescence/fluorescence white organic light-emitting device （WOLED） with high efficiency of 36.3 cd/A. In order to improve the relative intensity of blue light, we plus a blue light-emitting layer （BEML） in front of the orange light emitting layer （YEML） to take advantage of the excess singlet excitons. With the new emitting layer of BEML/YEML/BEML, we demonstrate the fluorescence/phosphorescence/fluorescence WOLED exhibits good performance with a current efficiency of 47 cd/A and an enhanced relative intensity of blue light.

关键词： BmPAC high efficiency blue organic light emitting diodes white organic light-emitting diodes

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Theoretical and experimental studies on microcavity organic light-emitting diodes with different emitters

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key Engineering Materials 2015年 645卷 1087-1092页

关键词： Reflection

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Unsupervised detection of abnormal behavior for intelligent surveillance

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Journal of Information and Computational Science 2014年第13期11卷 4805-4818页

作者： Zhang, Changqi Guan, Yepeng School of Communication and Information Engineering Shanghai University Shanghai China Key Laboratory of Advanced Displays and System Application Ministry of Education Shanghai University Shanghai China

A novel method based on dynamic particle flow has been developed to detect abnormal behavior automatically. The proposed approach starts by taking motion crowds as an aperiodic dynamical flow field to solve abnormal behavior detection problem. The motion in the scene is described by the particle trajectories computed by time integration of the dynamical flow field. Abnormal behavior is detected automatically based on some high-level features extracted from the developed particle flow without any hypothesis for the scene conditions in advance. The proposal does not require any object detection, tracking, or training in detecting abnormal behaviors. Comparative studies with some investigated methods have indicated the superior performance of the proposal in detecting abnormal behaviors from cluttered contents with dynamic scene variation and crowded environments. Copyright © 2014 Binary Information Press.

关键词： Flow fields

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Optimizing structure for constructing a highly efficient inverted top-emitting organic light-emitting diode with stable electroluminescent spectra

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Journal of Semiconductors 2014年第2期35卷 24-27页

作者：张小文许积文王华魏斌曾华荣蒋雪茵张志林 Guangxi Key Laboratory of Information Materials Guilin University of Electronic Technology Key Laboratory of Advanced Display and System Applications Ministry of EducationShanghai University Key Laboratory of Inorganic Functional Materials and Devices Shanghai Institute of CeramicsChinese Academy of Sciences

We demonstrate a highly efficient inverted top-emitting organic light-emitting diode （TOLED） having stable electroluminescent spectra and color coordination with variation of viewing angles by simply tuning the reso- nance wavelength corresponding to the free emission of the emitter. Using a doped fluorescent emitting system, the inverted TOLED exhibits an enhanced maximum current efficiency of 19 cd/A and a power efficiency of 17 lm/W, which are much higher than those （11 cd/A and 5 lm/W） of the counterpart with normal structure, although both TOLEDs behave with similar stable electroluminescent spectra characteristics. The results indicate that we provide a simple and effective method of constructing an excellent inverted TOLED for potentially practical applications.

关键词： OLED inverted structure stable electroluminescent spectrum microcavity effect

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FPGA-based real-time depth estimation for 3D video system

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Guangdianzi Jiguang/Journal of Optoelectronics Laser 2014年第5期25卷 974-980页

作者： Li, He-Jian An, Ping Zhang, Zhao-Yang Wang, Kui Cheng, Hao Key Laboratory of Advanced Display and System Application School of Communication and Information Engineering Shanghai University Shanghai 200072 China

Depth estimation is one of the key techniques in the front-end of stereoscopic video system which still faces some challenges, such as the depth accuracy, real-time processing and high resolution depth map generation. This paper proposes a hardware solution for real-time depth estimation to mainly resolve the speed issue, the accuracy as well as the high resolution. The system is implemented on a single FPGA, which uses match algorithm mixed by census transform and sum of absolute differences (SAD) to obtain a dense depth map. The design makes full use of the massive parallel resources and pipeline architectures of FPGA to improve data through-out and system clock frequency. Experiment results show that the proposed method is reasonable and can achieve real-time depth estimation for the full high definition (HD) (1920×1080) resolution video, with the disparity search range up to 240 pixels and the frame rate up to 69.6 frame/s. The performance of the proposed hardware system meets the requirements of 3D video system.

关键词： Field programmable gate arrays (FPGA)

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A low complexity adaptive loop filter algorithm for multi-view video coding

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Guangdianzi Jiguang/Journal of Optoelectronics Laser 2014年第2期25卷 336-342页

作者： Luo, Li-Dong Wang, Yong-Fang Shang, Xi-Wu Yang, Ping Zhang, Zhao-Yang Key Laboratory on Advanced Display and System Application of EMC School of Communication and Information Engineering Shanghai University Shanghai 200072 China

Adaptive loop filter (ALF) is a newly introduced technique for high-definition multi-view video coding. Its basic idea is to estimate Wiener filter parameters at the encoder and filter the reconstructed image with them to depress coding artifacts. ALF can improve video compression in both objective quality and subjective performance by adopting Wiener filtering with the goal of minimizing the mean square error between the original frame and the coded frame. However, the high computation complexity prevents it from the real-time application. Therefore, a low complexity algorithm is proposed to speed up the process of ALF. The basic idea of the method is to exploit inter-view correlation and inter-layer correlation to reduce the cumbersome process. We not only narrow down the maximum division depth candidates of the chrominance component and luminance component for every frame, but also adaptively terminate the process of deciding block control (DBC) of most frames in advance. Simulation results show that the proposed method can achieve the encoding time saving up to about 61% for ALF compared with the HEVC-based test model (i. e., HTM 6.1) without significant loss of encoding performance. Therefore, our algorithm can achieve a better tradeoff between coding efficiency and the ALF complexity, and well improve the performance of ALF.

关键词： Image compression

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An error concealment method for multi-view video plus depth coding

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Guangdianzi Jiguang/Journal of Optoelectronics Laser 2014年第4期25卷 756-763页

作者： Liu, De-Yang Ma, Ran Shi, Nan-Di An, Ping He, Xu-Yi Key Laboratory of Advanced Display and System Application of the Ministry of Education School of Communication and Information Engineering Shanghai University Shanghai 200072 China

Multi-view video plus depth (MVD) is a new 3D video format that would support 3D application developed by MPEG. Such a format is a combination of texture video and associated depth maps. For 3 viewing angles, there are 6 MVD components (texture center view, texture left view, texture right view, depth center view, depth left view and depth right view) in total for every time entity. The AVC-based test model (ATM) implements the joint encoding of MVD format. And due to the functionality and validity, the ATM makes the encoding of MVD more and more effective. Therefore, this makes compressed bit-streams very sensitive to transmission errors and leads to error propagation easily. In order to avoid the error propagation, effective error concealment (EC) algorithms are necessary. An error concealment method for ATM is proposed in this paper to improve video quality at decoder when video bit stream data with transmission errors. Based on the relationships between depth map and texture map, the inter-view correlation and the intra-view correlation, this paper proposes the corresponding operations to reconstruct the lost MBs in different views. Experimental results show that the proposed method is superior to the conventional concealment algorithms in terms of subjective evaluation.

关键词： Signal encoding

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