Liquid crystal display device and method for driving thereof

Details Liquid crystal display device and method for driving thereof Liquid crystal display device and method for driving thereof

1983-04-26

1986-04-29

Brigance, Gerald L.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340813, 340719, G09G 336

Patent

active

045860394

ABSTRACT:
A liquid crystal display device includes a field effect transistor array substrate (22) and a counter substrate (23). The field effect transistor array substrate (22) carries FETs (3), capacitors (5) and one electrode of the liquid crystal element deposited on a glass support (7). The counter substrate (23) carries a common electrode (31) in a form of stripes which extend parallel to the gate electrodes (8), and are deposited on another glass support (7'). The substrates are bonded together via a sealing member (21) and a suitable liquid crystal material (16) is injected therebetween. The device further includes a detecting circuit (33) for detecting a voltage produces at the drain electrode (6), a discriminator (34) for discriminating whether the voltage detected by the detecting circuit (33) is above or below a predetermined voltage, and a frame frequency adjusting circuit (35). When the detected voltage is higher than a predetermined potential, the adjusting circuit (35) increases the frame frequency, resulting in decrease of the write-in or coloration voltage. When the detected voltage is lower than the predetermined potential, the adjusting circuit (35) decreases the frame frequency, resulting in increase of the write-in voltage. Thus, the voltage applied to the liquid crystal (16) is corrected.

REFERENCES:
patent: 3976362 (1976-08-01), Kawakami
patent: 4045791 (1977-08-01), Fukai et al.
patent: 4242679 (1980-12-01), Morozumi et al.
patent: 4257045 (1981-03-01), Miles
patent: 4298866 (1981-11-01), Hodemaekers
patent: 4404555 (1983-09-01), Long et al.
patent: 4462027 (1984-07-01), Lloyd

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