| 摘要 |
In an AC plasma matrix panel, border sustain circuits needed for generating a constant supply of free particles are eliminated by the application of a 'distributed conditioning' waveform to all display cells, e.g. at 120 Hz, causing them to discharge without loss of memory of their ON/OFF state, which at other times is preserved by a sustain waveform. These waveforms, together with WRITE, ERASE and BULK ERASE are provided from ROM's addressed by logic signals. The first pulse 1 of the distributed conditioning waveform reverses wall charge only on a cell already ON, causing a flash; pulse II adds wall charge and fires only a cell already OFF, causing a flash at f and again at the pulse end at g: pulse III reverses wall charge on a cell originally ON, causing a second flash and leaving the cell ON. The flashes at 120 Hz are negligible against the 50 kHz flashing of ON cells. <IMAGE>
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