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检索条件"机构=Key Laboratory of Advanced Display and System Applications"

共 583 条记录，以下是331-340 订阅

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Analysis and Research Based on Electrohydrodynamic Inkjet Printing

Analysis and Research Based on Electrohydrodynamic Inkjet Pr...

引用

China International Forum o Solid State Lighting: International Forum on Wide Bandgap Semiconductors China (SSLChina: IFWS)

作者： Zhaoyu Chen Xinyi Wang Luqiao Yin Jianhua Zhang School of Microelectronics Shanghai University Shanghai China Key Laboratory of Advanced Display and System Applications Shanghai University Ministry of Education Shanghai China School of Microelectronics Shanghai Key Laboratory of Chips and Systems for Intelligent Connected Vehicle Shanghai University China

ISBN: (数字)9798331541149

ISBN: (纸本)9798331541156

Electrohydrodynamic (EHD) inkjet printing has the advantages of high precision and high automation, and its forming mechanism is complex. In this paper, the stress of Taylor cone and its influencing factors were analyzed systematically, and explored the influence of different process parameters on the printing process and effect. The results showed that the larger the voltage, the larger the droplet; the longer the cycle and voltage duration, the larger the droplet; the droplet size was linear with voltage and period. The influence of the printing height on the droplet size was very obvious. Excessive voltage made the printing process very unstable and inaccurate, and the droplet size gap was large and the droplet printing position deviated. Hope to provide some ideas for related research.

关键词： Automation Photonic band gap Voltage Ink jet printing Electrostatics Electrohydrodynamics Stress

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Interactive object segmentation using iterative adjustable graph cut

Interactive object segmentation using iterative adjustable g...

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2011 IEEE Visual Communications and Image Processing, VCIP 2011

作者： Shi, Ran Liu, Zhi Xue, Yinzhu Zhang, Xiang School of Communication and Information Engineering Shanghai University Shanghai 200072 China Key Laboratory of Advanced Display and System Application Shanghai University Ministry of Education Shanghai 200072 China Institute of Image Processing and Pattern Recognition Shanghai Jiaotong University Shanghai 200240 China

ISBN: (纸本)9781457713200

Interactive object segmentation is widely used for extracting any user-interested objects from natural images. A common problem with many interactive segmentation approaches is that the object segmentation quality is degraded due to inaccurate object/background seeds provided by the user. This paper proposes an iterative adjustable graph cut to efficiently solve this problem. First, object/background seeds are initialized based on the object segmentation result obtained with the user-specified scribbles as the interactive input. Then, an iterative seed adjustment scheme is exploited to correct inaccurate seeds and extract new suitable seeds via graph cut, in which the balancing weight between energy terms are adaptively updated to protect stable seeds and speedup the iteration process. Finally, suitable seeds are obtained and graph cut is used to segment the objects. Experimental results demonstrate the better segmentation performance of our approach even if user provides rather rough seeds. © 2011 IEEE.

关键词： Image segmentation

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Oxide Semiconductor Thin-Film Transistors with High Mobility and Stability

Oxide Semiconductor Thin-Film Transistors with High Mobility...

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International Conference on display Technology, 2024

作者： Yan, Guowen Wang, Dejian Sun, Xiaoqi Wen, Pan Peng, Cong Xu, Lin Ding, Lidong Chen, Fa-Hsyang Li, Xifeng Xi, Wangfeng Xing, Rubo Li, Junfeng Hefei Visionox Technology Co. Ltd Anhui Hefei230000 China Kunshan Govisionox Optoelectronics Co. Ltd Jiangsu Suzhou215301 China Key Laboratory of Advanced Display and System Application Ministry of Education Shanghai University Shanghai200072 China

This paper presents a oxide thin film transistors with high mobility by a new fabricate method. The high mobility TFT with ultra-high mobility of 55cm2/Vs has been obtained, and the PBTS and NBTS has also been optimiz... 详细信息

关键词： Thin film transistors

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Salient object segmentation based on graph cut

Salient object segmentation based on graph cut

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IEEE International Symposium on Intelligent Signal Processing and Communication systems (ISPACS)

作者： Ran Shi Zhi Liu Yinzhu Xue School of Communication and Information Engineering Shanghai University China Key Laboratory of Advanced Display and System Application Ministry of Education China

Salient object segmentation is an important technique for many content based applications. This paper presents an unsupervised salient object segmentation method under the graph cut optimization framework. First, we exploit a kernel density estimation based saliency model to generate the saliency map, which provides the useful cues for object segmentation. Then we exploit the saliency map to adaptively define the region cost term, the boundary cost term and their balancing weight in the cost function, which is minimized using graph cut to obtain a binary segmentation of salient objects. Experimental results on a variety of images demonstrate the better segmentation performance of our approach.

关键词： Image segmentation

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Fast seam carving based on direction map

Fast seam carving based on direction map

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IET International Communication Conference on Wireless Mobile and Computing (CCWMC 2011)

作者： Huan Du Zhi Liu Yinzhu Xue Ran Shi School of Communication and Information Engineering Shanghai University China Key Laboratory of Advanced Display and System Application Ministry of Education China

ISBN: (纸本)9781618399571

Seam carving is a new image retargeting method, which can alleviate the distortion on the main content of the image compared to the traditional scaling method. However, the original seam carving method uses the gradient amplitudes of pixels to construct the energy map, but neglects the gradient directions of pixels. Actually, the gradient direction refers to the direction where the pixel has the maximum rate of change. We can use the gradient direction of pixels to construct the direction map, and then naturally generate multiple seams from top to bottom based on the direction map. In addition, we use the priority windows to avoid intersecting seams. Experimental results show that our method can accelerate the speed of seam carving about 98 times while maintaining the quality of the image retargeting result.

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The Design of Synchronous Module in AM-OLED display Controller

The Design of Synchronous Module in AM-OLED Display Controll...

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The 2011 International Conference on Electric and Electronics (EEIC 2011)

作者： Junwei-Ma Feng Ran School of Mechatronical Engineering and Automation Shanghai University Key Laboratory of advanced Display and System Application Ministry of Education Shanghai University

On the basis of the analysis to the framework of AM-OLED display controllers, a key module — synchronous module is studied. In this paper, a FIFO circuit（first in first out） is designed using Gray convert technology and dual-port ram, which realizing scatheless transmit between different clock domain. The working principle of FIFO is analyzed, and the optimized FIFO circuit structure was put forward to improve the working stability of the FIFO. The synchronous module circuit was implemented by Verilog HDL language simulated through VCS（Verilog compiled simulator）. The design had been applied successfully to a type of full colour TFTLED panel driver controller with gray levels 256, frame scanning frequency 60 Hz ~ 100 Hz. The testing results showed that this controller worked well with a stable and vivid display.

关键词： AM-OLED,display controller,synchronous module,FIFO

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Salient object extraction based on nonparametric kernel density estimation

Salient object extraction based on nonparametric kernel dens...

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2007 IET Conference on Wireless, Mobile and Sensor Networks (CCWMSN07)

作者： Weiwei Li Zhi Liu Zhongmin Han Jiandong Gu Zhaoyang Zhang School of Communication and Information Engineering Shanghai University China Key Laboratory of Advanced Display and System Applicatio Shanghai University China

A major problem in content-based image retrieve (CBIR) is how to extract the perceptually salient object in an image. In this paper, we propose an efficient approach for automatic extracting the salient objects. First, an input image is segmented into homogeneous regions based on nonparametric kernel density estimation (NKDE), and then different features representing colour, texture and spatial position for individual region and adjacent region are extracted. By calculating the object important index (Oil), salient objects are adaptively extracted according to the defined criteria. Experimental results demonstrate the excellent extraction performance of the proposed approach.

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Electrothermal-coupled simulation of electrodes with flip-chip LEDs

Electrothermal-coupled simulation of electrodes with flip-ch...

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The 15th International Conference on Electronic Packaging Technology (ICEPT 2014) ) (第十五届电子封装技术国际会议)

作者： Jinlong Zhang Wen Gu Jianhua Zhang Peng Song Luqiao Yin School of Mechatronics and Automation Shanghai UniversityShanghai 200072China Key Lab.of Advanced Key Lab.of Advanced Display and System Applications(Shanghai University) Ministry of Education P.O.B

The current density of GaN-based light emitting diode(LED)plays a strong impact on the light output and heat transfer *** this paper,the finite element simulation software ANSYS is used to simulate the thermoelectric performance of LED chip with different electrode *** conventional LED chip and the flip-chip(FC)LED with bumps are compared in terms of the current density and the temperature *** improve the thermoelectric property of FC-LED,a structure of FC-LED with vias is proposed and simulated by the *** improve the uniformity of current density of the FC-LED with vias,the electrode structure is optimized with symmetrical *** simulated results show that the optimized structure obtains a better uniform temperature distribution,lower highest temperature and lower temperature *** confirm the relationship between the current density uniformity and the temperature distribution,the current density uniformity of different chip structures are quantitatively *** results show that the optimized FC-LED with vias shows the most uniform current density,indicating that the thermal properties are closely related to the uniformity of current density.

关键词： LED Current density Electrothermal-coupled Ansys

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Thick films of polymer Direct-conversion X-ray detectors

Thick films of polymer Direct-conversion X-ray detectors

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Electronics Packaging Technology Conference (EPTC)

作者： Hu Chen Yi Li Zhao Hao Xingyang Wu Jianhua Zhang The Key Laboratory of Advanced Display and System Application Ministry of Education Shanghai University Shanghai China Shanghai University Shanghai China

ISBN: (纸本)9781665416207

Organic conjugated polymers have been widely used in the field of X-ray detectors because of their simple processing, mechanical flexibility and low cost. In this paper, we report a vertical structure X-ray detector using PDMS material which is fabricated by simple process steps. The response of pure PDMS material to X-ray is verified, and the effects of different process conditions on the device performance were tested. The detector with film forming speed 2000 rpm and curing temperature 60°C still has high sensitivity $\left (434.5 \mu \mathrm{CGy}_{\text {air }}^{-1} \mathrm{~cm}^{-2}\right)$ to low dose rate $\left(23.9 \mu \mathrm{Gy}_{\text {air }}\text{S}^{-1}\right)$ when the applied bias voltage is 150 V. Finally, the device provides an idea for the development of low cost and high performance flexible direct X-ray detectors.

关键词： Performance evaluation Temperature sensors Micrometers X-ray detectors Sensitivity Costs Voltage

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Study on the degradation of sealed organic light-emitting diodes under constant current

Study on the degradation of sealed organic light-emitting di...

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International Conference on (ICEPT) Electronic Packaging Technology

作者： Xiao-Ming Xu Wen-Qing Zhu Qiang Wang Zhi-Lin Zhang Xue-Yin Jiang School of Material Science and Engineering Key Laboratory of Advanced Display and System Application Ministry of Education Shanghai University Shanghai China

Degradation characteristics of sealed OLED devices under four different constant currents were investigated by using OLEDs aging tester. We found that the higher the applied current density was, the faster luminance decayed. There was a relationship between luminance and lifetime when the current density was within 200 mA/cm 2 . In addition, spectrum characterization indicated that the peak wavelength didn't shift during the aging process, which implied that the carriers recombination occurred near the NPB/Alq 3 interface all along even when OLEDs luminance dropped down to half of the initial value, indicating that the degradation wouldn't lead to the deviation of the carriers recombination region. Through the metallurgical microscopy observation, the number of bubbles and dark spots were noticed to increase continuously and the non-emissive area kept growing around the bubbles. It showed that bubbles would badly accelerate the formation of dark spots. By investigating luminance degradation under constant current, we draw a conclusion that OLEDs luminance degradation is not entirely coulombic. After introducing an acceleration coefficient, the formular could be applicable until the current went beyond some degree.

关键词： Thermal degradation Organic light emitting diodes Glass Aging Cathodes Indium tin oxide Flat panel displays Current density Acceleration Anodes

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