Stable zinc oxide field emitter-based backlight unit for liquid crystal display  

一种基于稳定的氧化锌场致发射体的液晶显示器背光源(英文)

作　　者：李晨[1] 陈静[1] 雷威[1] 夏军[1] 王琦龙[1] 

机构地区：[1]东南大学电子科学与工程学院,南京210096

出　　处：《Journal of Southeast University(English Edition)》2013年第3期247-251,共5页东南大学学报（英文版）

基　　金：The National Basic Research Program of China(973 Program)(No.2013CB328803);the National Natural Science Foundation of China(No.51002031);the Ph.D.Programs Foundation of Ministry of Education of China(No.20100092120022);the National High Technology Research and Development Program of China(863 Program)(No.2012AA03A302,2013AA011004)

摘　　要：A zinc oxide ZnO field emitter-based backlight unit for liquid crystal display with a gated structure is fabricated by screen-printing processes.The measured anode field emission current density reaches 0.62 mA/cm2 when the applied gate voltage is 570 V.Part of the anode current is contributed by the secondary electron emission which is excited from the MgO layer inside the gate apertures on the gate plate. The average emission current density and luminance are 0.47 mA/cm2 and 1 250 cd/m2 respectively with a fluctuation of about 10% during the 1 000 min measurement.By a finite element method calculation the gated structure shows a good electron beam focusing property. The driving performance of the backlight unit is characterized by SPICE simulation tools and measured by the oscilloscope. Stable field emission line-by-line scanning and fast response characteristics of the backlight unit indicate its promising application in the liquid crystal displays.利用丝网印刷的方法制备了一种基于氧化锌发射体的三极结构场致发射背光源器件.当栅极电压达到570 V时,阳极场发射电流密度达到0.62 mA/cm2,部分阳极电流的产生是由于在栅极孔洞内侧的氧化镁受到电子激发产生了二次电子发射.在1 000 min的测试过程中,平均场发射电流密度和器件亮度分别为0.47 mA/cm2和1 250 cd/m2,波动小于10%.有限元模拟计算的结果表明,栅极结构具有良好的电子束聚焦性能.利用SPICE仿真模拟和示波器测量的方法考察了该背光源的驱动性能.稳定的场发射性能、逐行扫描的特性和高响应速度预示了基于该三极结构的场致发射器件在液晶显示器的中具有良好的应用前景.

关 键 词：field emission zinc oxide backlight unit response time 

分 类 号：TN873[电子电信—信息与通信工程]