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    • 2. 发明授权
    • Thin-film EL display panel with light-activated write and erase means
    • 薄膜EL显示面板,具有启用写入和擦除功能
    • US4210848A
    • 1980-07-01
    • US925973
    • 1978-07-19
    • Chuji SuzukiMasahiro IseKenzo InazakiKatsuyuki Machino
    • Chuji SuzukiMasahiro IseKenzo InazakiKatsuyuki Machino
    • H05B33/08H05B33/12H05B37/00H05B39/00H05B41/00
    • H05B33/08H05B33/12Y02B20/325
    • For a thin-film EL display panel which exhibits the hysteresis loop phenomenon in the applied voltage versus brightness relationship, a string of alternating sustain pulses are applied, the amplitude of which is chosen at the voltage level appearing at the point in the hysteresis loop characteristics where the difference between the minimum light brightness on the voltage increasing curve and the maximum light brightness on the voltage decreasing curve is substantially a maximum. A flash lamp, for example, a xenon lamp which releases light beams toward the thin-film EL display panel, is energized in synchronism with the application period and pause period of the alternating sustain pulses. There are provided means for controlling the application period of the alternating sustain pulses and the illumination period of the flash lamp in accordance with the light activated write mode or erase mode. The light beams can be applied to the thin-film EL display panel via a film bearing an optical image to be written or erased.
    • 对于在施加的电压与亮度关系中表现出磁滞回线现象的薄膜EL显示面板,施加一串交替的维持脉冲,其振幅选择在出现在磁滞回线特性点处的电压电平 其中电压增加曲线上的最小光亮度和电压下降曲线上的最大光亮度之间的差异基本上是最大值。 闪光灯例如向薄膜EL显示面板释放光束的氙灯与交替维持脉冲的施加周期和暂停时段同步地通电。 提供了用于根据光激活写入模式或擦除模式来控制交替维持脉冲的施加周期和闪光灯的照明周期的装置。 光束可以通过承载要被写入或擦除的光学图像的膜施加到薄膜EL显示面板。