Light-reflectivity controller for use with automotive rearview mirror using electrochromic element
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jan 23, 1990
Grant Date -
N/A
app pub date -
Feb 29, 1988
filing date -
Feb 27, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The light reflectivity control for use with an automotive rearview mirror according to the present invention has a first and second photosensors to detect the brightness of the surroundings including the front of a car in which the inside rearview mirror is equipped and that of the surroundings including the rear of the car, respectively. These photosensors deliver output signals in inverse proportion to the respective brightnesses of the surroundings of the car. The output signals are supplied to a first and second comparators each having at least a reference value predetermined correspondingly to the brightness of the surroundings, in which the output signals are compared with the reference values, respectively. Based on the signal including the information concerning the brightness of the surroundings including the front and rear, respectively, of the car and that are delivered from the comparators, voltages for application to the electrochromic elements and then the electrochromic elements are connected. Thereby, the voltage for application to the electrochromic elements are automatically and stepwisely correspondingly to the brightness of the surroundings of the car.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Advertisement
Advertisement
Advertisement
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully