Title:
POWER SUPPLY DEVICE/METHOD
Document Type and Number:
Japanese Patent JP3593869
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a power supply device capable of variably controlling the temperature gradient of output potential.
SOLUTION: When the output potential of a means 2 for adding 1st power supply potential Vx of which temperature gradient is (a) to 2nd power supply potential Vy of which temperature gradient is (b) is Vz=AVx+BVy (A and B are coefficients: expressions constituted of resistance values), the temperature gradient (c) of output potential is expressed by c=(AVx×a+BVy×b)/(AVx+ BVy), so that the temperature graident of output potential can be variably controlled by adjusting the coefficients A, B and the potential values Vx, Vy. Since the temperature characteristic of the power supply device can be matched with that of a liquid crystal display element to be driven by adjusting output potential adjusting resistance and input potential, display quality can be maintained against the ambient temperature.
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Inventors:
Takashi Fujise
Tadashi Yasue
Tadashi Yasue
Application Number:
JP2000698A
Publication Date:
November 24, 2004
Filing Date:
January 30, 1998
Export Citation:
Assignee:
Seiko Epson Corporation
International Classes:
G02F1/133; G09G3/18; G09G3/36; (IPC1-7): G02F1/133; G09G3/36
Domestic Patent References:
| JP5045623A | ||||
| JP7098577A |
Attorney, Agent or Firm:
Masahiko Ueyanagi
Osamu Suzawa
Osamu Suzawa