LCDs (Liquid crystal displays) controlled by thin film diode swi

Communications: electrical – Land vehicle alarms or indicators – Internal alarm or indicator responsive to a condition of the...

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357 4, 357 76, 340719, 340784, G02F 1133

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active

042511364

ABSTRACT:
A matrix multiplexed display cell has thin film switch devices at matrix crosspoints to provide a turn-on threshold for electrooptic liquid used in the cell. Each of the switch devices has two parallel branches of diodes, the diodes in one branch being of reverse polarity to those in the other. The cell is operated at low current so that the switch devices, which are deposited on glass, do not degrade rapidly in use.

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patent: 4198630 (1980-04-01), Serinken et al.
patent: 4204217 (1980-05-01), Goodman
patent: 4223308 (1980-09-01), Boraff et al.

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