Semiconductor device for liquid crystal panel driving power supp

Details Semiconductor device for liquid crystal panel driving power supp Semiconductor device for liquid crystal panel driving power supp

1993-02-12

1995-10-03

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

With specific source of supply or bias voltage

327546, 345 98, G05F 110, G06F 314

Patent

active

054555345

ABSTRACT:
A semiconductor device for a liquid crystal panel driving power supply in which a first reference voltage is converted in impedance by an operational amplifier to output it as a second reference voltage, comprising control means wherein, in a suitable fixed period during a period of displaying a liquid crystal, the current supply capacity of said operational amplifier is enhanced, and, in another period during said period of displaying a liquid crystal, the current supply capacity of said operational amplifier is lowered.

REFERENCES:
patent: 3775693 (1973-11-01), Proebsting
patent: 4099073 (1978-07-01), Hashimoto et al.
patent: 4158786 (1979-07-01), Hirasawa
patent: 4621207 (1986-11-01), Suganuma et al.
patent: 5283565 (1994-02-01), Suzuki et al.
patent: 5287019 (1994-02-01), Nonaka et al.

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