LCD contrast adjustment system

Details LCD contrast adjustment system LCD contrast adjustment system

1989-09-11

1991-07-09

Miller, Stanley D.

Communications: electrical

Land vehicle alarms or indicators

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

350339R, 340713, G02F 113

Patent

active

050299824

ABSTRACT:
A system for maintaining the contrast of an LCD at a constant level despite variations in temperature of the liquid crystal medium includes a temperature sensor and digital circuitry for generating a correction voltage that offsets the change in contrast level caused by the change in operating temperature.

REFERENCES:
patent: 3907405 (1975-09-01), Fukai et al.
patent: 4525032 (1985-06-01), Hilsum
patent: 4723836 (1988-02-01), Kono et al.
patent: 4917469 (1990-04-01), Ross
patent: 4923285 (1990-05-01), Ogiro et al.

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