Cathodoluminescent characteristics of a spherical Y2O3:Eu phosphor screen for field emission display application
Cathodoluminescent characteristics of a spherical Y2O3:Eu phosphor screen for field emission display application
复制标题
DOI：
10.1149/1.1393872
复制
发表时间：
2000-08-01
影响因子：
3.9
通讯作者：
Kwon, SJ
中科院分区：
文献类型：
--
作者：
Cho, SH;Kwon, SH;Kwon, SJ
研究了球形 Y2O3:EU 荧光屏的阴极发光特性 (CL)，用于场致发射显示应用。作为阳极板的荧光屏与具有 25 X 25 像素的 0.7 英寸对角 Si 基 Mo 尖端场发射器阵列进行真空密封（类似于 3 x 10(-6) Ton）。采用气溶胶热解法合成球形 Y2O3:EU 荧光粉，采用电泳沉积法制备。通过采用 PWM 驱动方案的外部驱动电路将字符图像显示在该阳极板上。在400 V阳极电压和55 V栅极电压下可以获得41 cd/m(2)的CL亮度，CIE色度为x = 0.649，y = 0.346，在de模式下感应出48 mu A/cm(2)电流密度，对应于0.63 lm/W。然而，通过减少屏幕上的电荷剂量，屏幕效率可以提高到1.24 lm/W，其工作条件为400 V阳极电压和60 Vp-p栅极电压，在15%脉冲模式下诱导平均30 μA/cm(2)发射电流密度。结果发现，荧光屏的电阻率是显示字符的池图像的根源，甚至导致发射光的突然减少。本文研究了球形 Y2O3:Eu 荧光粉屏幕在低电压操作下的充电效应对亮度的影响，并基于实验观察讨论了提高图像质量的方法。 (C) 2000 年电化学协会。 S0013-4551(99)09-013-8。版权所有。
The cathudoluminescent characteristics (CL) of a spherical Y2O3:EU phosphor screen were investigated for field emission display application. The phosphor screen as an anode plate was vacuum sealed (similar to 3 x 10(-6) Ton) with 0.7 in, diagonal Si-based Mo tip field emitter array with 25 X 25 pixels. It was prepared by electrophoretically depositing spherical Y2O3:EU phosphors, which were synthesized by the aerosol pyrolysis method. The character image was displayed on this anode plate by an external driver circuit with PWM driving scheme. The CL brightness of 41 cd/m(2) with CIE chromaticity of x = 0.649, y = 0.346 could be obtained at 400 V anode voltage and 55 V gate voltage inducing a 48 mu A/cm(2) current density in the de mode, corresponding to 0.63 lm/W. However, screen efficiency could be increased to 1.24 lm/W by reducing the charge dose on the screen, of which the operating conditions were of 400 V anode voltage and 60 Vp-p gate voltage inducing an average 30 mu A/cm(2) emission current density in 15% pulse mode. It was found that the electrical resistivity of the phosphor screen was the origin of a pool image of displayed character and even caused a sudden decrease of emission light. The charging effects of spherical Y2O3:Eu phosphors screen on the luminance under low voltage operation are examined in this work and the methodology for enhancing picture quality is discussed based on experimental observation. (C) 2000 The Electrochemical Society. S0013-4551(99)09-013-8. All rights reserved.