Method and circuit for controlling contrast in liquid crystal di

Details Method and circuit for controlling contrast in liquid crystal di Method and circuit for controlling contrast in liquid crystal di

1997-01-03

2000-09-12

Brier, Jeffery

Computer graphics processing and selective visual display system

Plural physical display element control system

Display elements arranged in matrix

345 89, G09G 336

Patent

active

061184233

ABSTRACT:
A method of controlling contrast in LCDs using dynamic LCD biasing includes the step of identifying an expected bias function as a function of LCD material, LCD operating voltage, and LCD duty cycle. The expected bias function is then approximated to obtain a linear description of the expected bias function. A voltage is generated that follows the linear description of the expected bias function. The step of generating the voltage results in dynamic LCD biasing.

REFERENCES:
patent: 5250937 (1993-10-01), Kikuo et al.
patent: 5404150 (1995-04-01), Murata

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