Control signal for a voltage generator for an LCD screen control

Details Control signal for a voltage generator for an LCD screen control Control signal for a voltage generator for an LCD screen control

1997-10-28

1999-06-01

Riley, Shawn

Electricity: power supply or regulation systems

In shunt with source or load

Using choke and switch across source

323283, G05F 110

Patent

active

059091061

ABSTRACT:
For controlling a voltage generator (1), a control signal (PBM) is used, with an active part having a variable number of pulses (N) which determines the value of the output voltage of the generator. The output voltage of the generator is used to control the contrast of an LCD screen and the number of pulses in the control signal is adjusted in accordance with the temperature of the LCD screen to compensate for the effect that temperature has upon contrast.

REFERENCES:
patent: 5272614 (1993-12-01), Brunk et al.
patent: 5349523 (1994-09-01), Inou et al.
patent: 5696439 (1997-12-01), Presti et al.

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