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丝网印刷碳纳米管显示器灰度失真的研究 预览

On Distortion of Greyscale Display for Silk Screen Printed Carbon Nanotube Display
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摘要 通过研究两级结构丝网印刷碳纳米管显示器(CNT-FED)引线电极的线性分压问题,发现电极的线性电阻导致不同像素点间存在0.2%的电场偏差,引起8位元(256级)灰度显示中的24级灰度被湮没.为解决电极引线引起的灰度图像显示失真的问题,提出了一种CNT-FED电极的改造方法,通过改进屏内部引线电极和增加阴极反馈电阻,使像素点间的等效电阻值偏差从总电阻值的0.2%减小到0.0003%,且抑制了发射电流的波动,增加了像素点的过流保护.计算和仿真结果显示,新电极消除了256级灰度显示的失真,有效提高了CNT-FED的发光均匀性. By investigating voltage division caused by linear impedance of electrode in screen printed carbon nanotube field emission display (CNT-FED) with diode structure, it was found that linear impedance of electrodes caused 0.2% variation of electrical field between different pixels, that resulted in 24 grey-scale died away in 8-bit grayscale display (256 grey scales). Therefore, a reconstruction method for electrode of CNT-FED is presented. By amending the electrode and adding a feedback impedance on cathode, the impedance variation between pixels and the total impedance are decreased from 0. 2% to 0. 000 3%. Field emission current variation is restrained, and the pixels are protected against over-current. Distortion of 256 grey scales display is eliminated with new electrodes, and luminance uniformity of CNT-FED is effectively improved.
作者 潘金艳 朱长纯 商世广 于灵敏 PAN Jinyan, ZHU Changchun, SHANG Shiguang, YU Lingmin (School of Electronics and Information Engineering, Xi'an Jiaotong University, Xi'an 710049, China)
出处 《西安交通大学学报》 EI CAS CSCD 北大核心 2008年第6期 734-738,共5页 Journal of Xi'an Jiaotong University
基金 国家自然科学基金重点资助项目(60036010) 国家自然科学基金资助项目(60476037).
关键词 碳纳米管显示器 丝网印刷 灰度 发光均匀性 carbon nanotube field emission display silk screen print greyscale luminance uniformity
作者简介 潘金艳(1978-),女,博士生; 朱长纯(联系人),男,教授,博士生导师.
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参考文献15

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