Liquid crystal matrix display device

Details Liquid crystal matrix display device Liquid crystal matrix display device

1982-06-08

1984-11-27

Brigance, Gerald L.

Communications: electrical

Land vehicle alarms or indicators

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

340752, 350333, G09G 336

Patent

active

044853807

ABSTRACT:
A liquid crystal matrix display device has a plurality of liquid crystal 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 compensate for crosstalk that occurs because of parasitic capacitance between the vertical transmitting lines and the liquid crystal display elements, auxiliary lines are provided for the columns of such display elements, and each has a predetermined compensating capacitance relative to its associated liquid crystal display elements. A compensating signal, which is an inverted version of the video signal, is applied in succession to the auxiliary lines to compensate for any crosstalk.

REFERENCES:
patent: 3851212 (1974-11-01), Umeda et al.
patent: 3982239 (1976-09-01), Sherr
patent: 3995942 (1976-12-01), Kawakami et al.
patent: 4099855 (1978-07-01), Wisbey et al.
patent: 4277786 (1981-07-01), Waldron
patent: 4449125 (1984-05-01), Clerc et al.

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