Liquid crystal apparatus having light quantity of the backlight

Details Liquid crystal apparatus having light quantity of the backlight Liquid crystal apparatus having light quantity of the backlight

1989-02-13

1990-09-25

Miller, Stanley D.

Communications: electrical

Land vehicle alarms or indicators

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

350333, 350350S, 340784, G02F 1133

Patent

active

049589156

ABSTRACT:
A liquid crystal apparatus, comprising a liquid crystal panel comprising a plurality of scanning lines, and a plurality of picture elements disposed along each of the scanning lines and comprising a ferroelectric liquid crystal; a backlight disposed behind the liquid crystal panel for illuminating the liquid crystal panel, the backlight changing the light quantity emitted therefrom with the elapse of time. The liquid crystal apparatus is so driven that the low level of the light quantity of the backlight is synchronized with a time when a writing signal is applied to picture elements on at least one scanning line.

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patent: 4791418 (1988-12-01), Kawahara et al.
patent: 4824216 (1989-04-01), Perbet et al.

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