Symmetrical internal heater for liquid crystal display

Details Symmetrical internal heater for liquid crystal display Symmetrical internal heater for liquid crystal display

1977-02-04

1978-06-06

Bauer, Edward S.

Electric heating

Microwave heating

Tunnel furnace

219209, 219214, G02F 113

Patent

active

040933555

ABSTRACT:
A liquid crystal cell having an internal resistance-type heating means for rapid cell warm-up, and for maintaining the cell at a predetermined temperature while it is operating as a visual display. The heating means comprises electrically symmetrical transparent films of resistance material on facing surfaces of transparent members sandwiching the liquid crystal material. The resistive films are covered with an insulating film, on which is disposed the control electrodes for the electro-optic display of the liquid crystal cell. Heating voltages, higher than those required to operate the visual display, can be safely applied in parallel across the films without interfering with a concurrent visual display.

REFERENCES:
patent: 3499112 (1970-03-01), Heilmeier et al.
patent: 4029393 (1977-06-01), Dungan et al.

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