Method for driving liquid crystal display elements

Details Method for driving liquid crystal display elements Method for driving liquid crystal display elements

1980-04-10

1982-12-21

Miska, Vit W.

Horology: time measuring systems or devices

Displays or display device details

Optical

368242, 340765, 350332, G04L 1700, G09F 900

Patent

active

043646727

ABSTRACT:
A method for driving a liquid crystal display element so as to give a simultaneous analogue display of 3 kinds of information. The liquid crystal display element is driven over 1/3-duty periods by applying 4 kinds of voltage waveforms to one electrode formed on one of paired substrates, and at least 5 kinds of voltage waveforms to the other electrode on the other substrate, said electrodes being divided into a multiplicity of electrode patterns. In particular, one of the 4 kinds of voltage waveforms applied to the electrodes of one of said substrates is set to provide an OFF condition for the display regardless of which of the at least 5 voltage waveforms is applied to the electrodes of said other substrate. In this driving method only one chip of the element driving LSI is sufficient for a simultaneous analogue display of 3 kinds of information e.g. hour, minute, and second.

REFERENCES:
patent: 3877017 (1975-04-01), Kawakami et al.
patent: 3976362 (1976-08-01), Kawakami
patent: 3987617 (1976-10-01), Sloh
patent: 3995942 (1976-12-01), Kawakami et al.
patent: 4076385 (1978-02-01), Kondo
patent: 4078374 (1978-03-01), Kondo
patent: 4079369 (1978-03-01), Fukumoto
patent: 4100540 (1978-07-01), Fujita et al.
patent: 4212159 (1980-07-01), Noble et al.

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