Driving signal generator for a liquid crystal display

Details Driving signal generator for a liquid crystal display Driving signal generator for a liquid crystal display

1997-08-20

1999-08-17

Chow, Dennis-Doon

Computer graphics processing and selective visual display system

Display driving control circuitry

Display power source

345212, 345205, 345 87, 307125, 307130, 307140, 307139, 39575003, 39575005, 39575008, G09G 500

Patent

active

059400692

ABSTRACT:
A driving signal generator of the LCD includes a DC/DC converter which generates a constant analog voltage of 5V after receiving a power voltage of 5V or 3.3V. Resistors connected in series between the output terminal of the DC/DC converter and the ground divide the output voltage of the DC/DC converter. An npn-type transistor sets a digital voltage of 3.3V level from the voltage divided by the resistors, and an NMOS transistor outputs the digital voltage set by the npn-type transistor.

REFERENCES:
patent: 5283762 (1994-02-01), Fujishima
patent: 5422523 (1995-06-01), Roberts et al.
patent: 5550729 (1996-08-01), Wissell
patent: 5608275 (1997-03-01), Khosrowpour
patent: 5627413 (1997-05-01), Mughir et al.
patent: 5632039 (1997-05-01), Walker et al.
patent: 5680068 (1997-10-01), Ochi et al.
patent: 5828892 (1998-10-01), Mizuta

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