Light-responsive control device of electrochromic rearview...

Details Light-responsive control device of electrochromic rearview... Light-responsive control device of electrochromic rearview...

2005-11-22

2005-11-22

Luu, Thanh X. (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

C359S267000, C359S604000

Reexamination Certificate

active

06967318

ABSTRACT:
A light-responsive control device of an electrochromic rearview mirror system is disclosed. The light-responsive control device includes a downward ambient light sensor and a, discriminating circuit for generating a first and a second reference levels provided for daytime and nighttime glaring determination, respectively. By providing a photo-sensor for each rearview mirror, and individually comparing the outputs of the photo-sensors with the first or the second reference level, the color-change degrees of different rearview mirrors can be individually controlled. By providing a variable resistor for the drive circuit, the initial reflection rate of the rearview mirror can be adjusted optionally.

REFERENCES:
patent: 4896030 (1990-01-01), Miyaji
patent: 4917477 (1990-04-01), Bechtel et al.
patent: 5550677 (1996-08-01), Schofield et al.
patent: 5659423 (1997-08-01), Schierbeek et al.
patent: 5760962 (1998-06-01), Schofield et al.
patent: 06-281967 (1993-03-01), None
patent: 461402 (1989-02-01), None

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