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公开(公告)号：US3906290A
公开(公告)日：1975-09-16
申请号：US39879173
申请日：1973-09-19
CPC分类号： G09G3/2022 , G09G3/2946 , G09G3/296 , G09G3/297 , G09G2310/0224 , G09G2310/0267 , G09G2310/0275
摘要： A display apparatus capable of displaying a picture with halfbrightness (gray scale) by use of a display panel such as a plasma display panel, comprising a plurality of picture elements or luminescent dots which assume either a luminescent condition or a nonluminescent condition. A halftone picture display can be achieved according to two methods, the first being that the mean brightness of the picture element or luminescent dot be made porportional to the turn-on period. The second method is that the mean brightness of the picture element or luminescent dot for the turn-on period be made proportional to the frequency of the sustaining voltage. Several embodiments are disclosed which incorporate one or both of the foregoing principles to achieve a halftone display.
摘要翻译： 一种能够通过使用诸如等离子体显示面板的显示面板来显示具有半亮度（灰度级）的图像的显示装置，包括呈现发光条件或非发光状态的多个像素或发光点。 可以根据两种方法实现半色调图像显示，首先是将图像元件或发光点的平均亮度与导通周期进行比较。 第二种方法是将导通周期的像素或发光点的平均亮度与维持电压的频率成比例。 公开了几个实施例，其包含前述原理中的一个或两个以实现半色调显示。
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公开(公告)号：US3866084A
公开(公告)日：1975-02-11
申请号：US26129172
申请日：1972-06-09
CPC分类号： H01J11/00
摘要： A plasma display panel device has a pair of electrodes arranged to face with each other with a sealed discharging gap therebetween in which a dischargeable gas is filled. When a voltage is impressed between the electrodes an electrical discharge of the gas will be caused and provide luminescence to display a character, such as a letter or a figure in accordance with the selected electrodes. Only one insulating layer, which covers one of the pair of the electrodes, is needed to effectively operate the display. A wall charge having an opposite polarity to that of the electrode voltage is provided on the insulating layer whereby a decrease of the electrode voltage can be prevented and the memory function, capable of turning ''''on'''' (to write) and ''''off'''' (to erase) by impressing a write pulse or an erase pulse, is formed. The single insulating layer enables a decrease of the operation voltage, a high resolution and an accurate writing and erasing to be realized.
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