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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.
A three-electrode structure field emission backlight device based on zinc oxide emitter was prepared by screen printing method.When the gate voltage reached 570 V, the emission current density of the anode field reached 0.62 mA / cm2, and part of the anode current Due to the secondary electron emission generated by the electron excitation of the magnesium oxide inside the gate hole.The average field emission current density and device luminance were 0.47 mA / cm2 and 1 250 cd / m2 respectively for the 1 000 min test , The fluctuation is less than 10% .The results of finite element simulation show that the gate structure has good electron beam focusing performance.Using the method of SPICE simulation and oscilloscope measurement, the driving performance of the backlight is investigated. The stable field emission performance The characteristics of line scanning and high response speed indicate that the field emission device based on the three-pole structure has a good application prospect in a liquid crystal display.