会务信息的电致发光矩阵大屏幕显示

A LARGE AREA ELECTROLUMINESCENT MATRIX DISPLAY

本文概述了长春物理研究所为人民大会堂研制的交流(AC)、直流(DC)电致发光(EL)矩阵大屏幕会务信息显示的结果。其中,ACEL矩阵屏幕尺寸为2.5×3m^2,由30块0.46×0.46m^2的单元屏拼接而成。平均亮度20尼特,对比度10:1;DCEL矩阵屏幕为:1m^2,行列数120×144,平均亮度45尼特,对比度大于10:1。在环境照度60lux条件下,观察距离分别为65m、20m。并从分析EL矩阵的显示特性出发,阐明了显示系统的设计要点,控制、匹配电路和亮度、对比度的关系;还给出了部分驱动电路结构和系统的应用结果。

A Large electroluminescent (EL) matrix display for conference signal is applicated in the Great Hall of the Peaple.The result is satisfactory. It consists of ACEL and DCEL of phosphor material. The whole size of the AC-EL screen is 2.5×3m2 composed of 30 single green screen of 0.46×0.46m2. Average brightness is 20 cd/m2, and its contrast is 10:1. The size of DCEL screen is about lm2 with resolution of 120×144 yellow. Average brightness 45cd/m2, and contrast better than 10:1. Under room light condition, the display content could be seen clearly within distance of 65m,20m respectivelly. By analysing the characteristics of EL display for alphanumeric, it should be point that the control and match networks have important relation to brightness or contrast of EL display. Some block diagrams of the display and results of application are shown.