| 摘要 |
An electro-optical display device comprising a multitude of liquid crystal display elements arranged in a predetermined order to represent analogically expressed quantity by counting numbers of said display elements sequentially and accumulatively turning on. Said display elements include a layer of liquid crystal material confined between a pair of electrodes. On the one side of said pair of electrodes one pulse signal is applied transmitted selectively from a plurality of different pulses and on the other side of said pair of electrodes another pulse signal is applied transmitted selectively from a plurality of different pulses. The combination of said two selected pulses produces a plurality of combined pulses equivalent to an alternating current pulse which have a certain effective value of a voltage. Said combined pulses are divided into two pulse combinations, one of which comprises an excitation voltage to fully excite said liquid crystal material for turning ON said display elements, the other of which comprises an excitation voltage not to excite said liquid crystal material for turning OFF said display elements. Said selected combined pulses are applied continuously across each of said pair of electrodes and switched sequentially and cyclically into another combined pulses selected respectively by means of a switching operation.
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