Control circuit for liquid crystal rear-vision mirror
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United States of America Patent
Stats
-
Apr 11, 1989
Grant Date -
N/A
app pub date -
Dec 30, 1987
filing date -
Dec 31, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A circuit for controlling a liquid crystal rear-vision mirror is disclosed. The liquid crystal rear-vision mirror is equipped in an automobile to sense the amount of lights incident upon the mirror itself from a headlight of another automobile following behind. When the level of incident lights goes higher than a pre-determined level, the circuit generates a pulse signal of a fixed period to make the liquid crystal shutter properly function so that the amount of said incident light reflecting from the mirror to the driver will be decreased to a level adequate to secure driving safety.
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Family
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Cited Art Landscape
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