Liquid crystal matrix display device

Details Liquid crystal matrix display device Liquid crystal matrix display device

1982-06-03

1984-05-08

Brigance, Gerald L.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340802, 340718, 358241, G09G 318

Patent

active

044478127

ABSTRACT:
A liquid crystal matrix display device has a plurality of display elements arranged in an X-Y matrix pattern. Vertical transmitting lines are connected to all of the display elements of each column, and horizontal transmitting lines are connected to each of the display elements of each row. Each of the vertical lines is connected through an input switching element to an input circuit to receive a video input signal and a horizontal pulse generator provides sequential pulse signals to control terminals of the input switching elements. In order to improve the resolution without sacrifice of contrast, the vertical transmitting lines are arranged into groups of a predetermined number of such lines, and the input switching elements associated with the lines of each such group have their control electrodes coupled together to a respective output of the horizontal scanning pulse generator. The input circuit includes time-demultiplexing circuitry, for example, formed of sample/hold circuits, to present respective sampled versions of the input signal, staggered with respect to one another, to input electrodes of respective ones of the input switching devices of each of the groups.

REFERENCES:
patent: 3627924 (1971-12-01), Fleming et al.
patent: 3883862 (1975-05-01), Nishizawa et al.
patent: 4193095 (1980-03-01), Mizushima
patent: 4359729 (1982-11-01), Nonomura et al.

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