Electricity: power supply or regulation systems – External or operator controlled
Patent
1994-07-18
1997-05-06
Hecker, Stuart N.
Electricity: power supply or regulation systems
External or operator controlled
345 94, G05B 2402, H02J 100
Patent
active
056274572
ABSTRACT:
An objective of the present invention is to provide a power supply device, a liquid crystal display device, and a method of supplying power that can enable designs with lower power consumptions and can also enable higher display qualities. A first voltage Vx, which is a constant voltage, is generated by a first voltage generation portion in a voltage regulation portion. A second voltage Vy having a value independent of that of Vx is generated by a second voltage generation portion, and Vx and Vy are added by an adder portion to generate a regulated voltage Vreg. A control portion provides variable control of Vy within a voltage regulation range that is defined to include Vx. The regulated voltage Vreg is divided by a voltage divider portion within a multi-value voltage generation portion. The impedances of voltages V2 and V4 are converted by first impedance conversion portions (n-type OP-amps), and the impedances of voltages V1 and V3 are converted by second impedance conversion portions (p-type OP-amps).
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Aoki Shigeki
Ishiyama Hisanobu
Hecker Stuart N.
Seiko Epson Corporation
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