Power supply method for liquid crystal display

Details Power supply method for liquid crystal display Power supply method for liquid crystal display

1978-12-29

1981-10-27

Trafton, David L.

Communications: electrical

Visual indication

Movable

323312, 340765, 350332, G08B 536

Patent

active

042976979

ABSTRACT:
A power supply for a liquid crystal display including a power source for delivering a voltage larger than the driving voltage of the display and a voltage regulator for adjusting the voltage applied to the display to that required to drive the display is provided. The liquid crystal display includes at least two plates having electrodes thereon in a liquid crystal material disposed between the plates. The voltage regulator has a temperature characteristic corresponding to that of a liquid crystal display wherein the driving voltage of the display decreases with an increase in temperature. The power supply allows use of batteries having inferior discharge characteristics and operating the display in the 1/4 duty-driving mode.

REFERENCES:
patent: 3613351 (1971-10-01), Walton
patent: 3919625 (1975-11-01), Barton
patent: 3921162 (1975-11-01), Fukai et al.
patent: 3956661 (1976-05-01), Sakamoto et al.
patent: 4037931 (1977-07-01), Ido et al.
patent: 4044546 (1977-08-01), Koike
patent: 4057325 (1977-11-01), Kondo
patent: 4091377 (1978-05-01), Shimoi
patent: 4113361 (1978-09-01), Nakano
patent: 4128496 (1978-12-01), Cole et al.

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