Automatic dimming mirror using semiconductor glare sensor

Details Automatic dimming mirror using semiconductor glare sensor Automatic dimming mirror using semiconductor glare sensor

2005-03-08

2005-03-08

Sikder, Mohammad (Department: 2872)

Optical: systems and elements

Glare or unwanted light reduction

With mirror

C359S601000, C359S602000, C359S605000

Reexamination Certificate

active

06863405

ABSTRACT:
An automatically dimming mirror includes a dimming element having variable reflectivity, the degree of reflectivity based on a control signal. An ambient light sensor is positioned to receive light from a region generally in front of the vehicle. The ambient light sensor outputs a discrete ambient light signal based on the amount of light incident on the ambient light sensor over an integration period. A glare sensor is positioned to view the scene generally behind the vehicle operator. The glare sensor outputs a discrete glare signal based on the amount of light incident on the glare sensor over an integration period. A dimming logic determines an ambient light level based on the ambient light signal. The glare integration period is determined based on the ambient light level. The glare signal resulting from the glare integration period determines a mirror glare level used to set the dimming element control signal.

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