Apparatus and method for generating bias voltages for liquid cry

Details Apparatus and method for generating bias voltages for liquid cry Apparatus and method for generating bias voltages for liquid cry

1996-04-10

1999-02-02

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

With specific source of supply or bias voltage

327538, 307 15, 307 37, 307 38, G05F 110

Patent

active

058670572

ABSTRACT:
An apparatus and method for generating bias voltages for an LCD driver. A voltage divider including serially connected resistors of a first resistance is arranged to form a DC current path having nodes. The voltage of each node serves as a bias voltage to the LCD driver for actuating the LCD driver to generate LCD driving signals. A signal generator is used to generate a switching signal in synchronism with the LCD driving signals. A switching circuit including switches is arranged so that when the switches are closed, the resistance between two adjacent nodes has a small value, so as to provide large driving currents to the LCD driver, and when the switches are open, the resistance has a large value, so as to reduce the amount of leakage current through the DC current path.

REFERENCES:
patent: 4012688 (1977-03-01), Blackburn et al.
patent: 5339021 (1994-08-01), Thomson
patent: 5343221 (1994-08-01), Arakawa et al.
patent: 5416438 (1995-05-01), Shibata
patent: 5532718 (1996-07-01), Ishimuru

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