Driving circuit for liquid crystal display

Details Driving circuit for liquid crystal display Driving circuit for liquid crystal display

1986-05-09

1988-10-25

Miller, Stanley D.

Communications: electrical

Land vehicle alarms or indicators

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

350333, 340784, 340811, G02F 113, G09G 336, G09G 300

Patent

active

047799560

ABSTRACT:
A liquid crystal display having plural liquid crystal cells which are constituted as a matrix, each cell respectively having one transistor and being supplied with image signals by such transistors. The driving circuit for a liquid crystal display of the present invention periodically changes the polarity of the voltage of the image signals and the voltage between both terminals of the liquid crystal cell so as to switch the transistor, and the driving circuit generates gate signals which are impressed on the gate electrode of each transistor, the gate signals having a lowest voltage which is lower than a voltage obtained by subtracting the amplitude voltage of the common electrode of the liquid crystal cells from the lowest voltage in the driving voltage obtained from the image signals.

REFERENCES:
patent: 4158860 (1979-06-01), Irie et al.
patent: 4319237 (1982-03-01), Matsuo et al.
patent: 4427978 (1984-01-01), Williams
patent: 4447812 (1984-05-01), Soneda et al.
patent: 4485380 (1984-11-01), Soneda et al.

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