Control circuit for liquid crystal rear-vision mirror

Details Control circuit for liquid crystal rear-vision mirror Control circuit for liquid crystal rear-vision mirror

1987-12-30

1989-04-11

Shoop, Jr., William M.

Electrical transmission or interconnection systems

Vehicle mounted systems

Automobile

350279, 350331R, G02F 1133

Patent

active

048209333

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.

REFERENCES:
patent: 4021935 (1977-05-01), Witt
patent: 4152846 (1979-05-01), Witt
patent: 4560239 (1985-12-01), Katz
patent: 4603946 (1986-08-01), Kato et al.
patent: 4620322 (1986-11-01), Eggenschwiler et al.
patent: 4632509 (1986-12-01), Ohmi et al.
patent: 4669825 (1987-06-01), Itoh et al.
patent: 4678281 (1987-07-01), Bauer
patent: 4690508 (1987-09-01), Jacob
patent: 4697883 (1987-10-01), Suzuki et al.
patent: 4701022 (1987-10-01), Jacob

Affiliated with

Also associated with

Rating

Control circuit for liquid crystal rear-vision mirror does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Control circuit for liquid crystal rear-vision mirror, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Control circuit for liquid crystal rear-vision mirror will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-668917