04676601 is referenced by 184 patents and cites 45 patents.

A drive apparatus for a liquid crystal dazzlement preventing mirror arrangement for automatically setting a liquid crystal panel of the mirror arrangment to a dazzlement preventing state by detecting illuminance on the mirror surface and brightness in region near the mirror. An incident light detecting unit detects incident light onto the mirror. An ambient light detecting unit detects brightness in a region around mirror. A control unit receives both the incident light and the ambient light signals and produces a control signal for driving the liquid crystal panel through a drive unit. The apparatus includes an illuminance descrimination function, which is performed in such a manner that in the event of the illuminance on the mirror surface is higher than first prescribed set value of incident light illuminance and the illuminance in region around the mirror is lower than a prescribed set value of ambient light illuminance, the dazzlement preventing state is provided, and that in the event of the incident light illuminance is higher than a second prescribed set value of incident light illuminance which is higher than that of the first set value, irrespective of the ambient light illuminance, the dazzlement preventing state is also provided.

Title
Drive apparatus for a liquid crystal dazzle-free mirror arrangement
Application Number
616185
Publication Number
4676601
Application Date
April 2, 1986
Publication Date
June 30, 1987
Inventor
Kunihiko Hara
Nukata
JP
Tsuyoshi Fukada
Nagoya
JP
Yasutoshi Suzuki
Oobu
JP
Shinya Ohmi
Anjo
JP
Hiroshi Itoh
Oobu
JP
Agent
Cushman Darby and Cushman
Assignee
Nippondenso
JP
IPC
G02B 17/00
G02F 1/13
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