Vehicle accessory having a rear light receiving sensor for measuring illumination intensity inside the vehicle
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United States of America Patent
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Sep 13, 2011
Grant Date -
Feb 4, 2010
app pub date -
May 14, 2009
filing date -
Jul 29, 2008
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The present invention provides a vehicle accessory which reliably blocks the sunlight without any mechanical operation. The vehicle accessory includes: a light controlling sheet which is attached to the windshield of a vehicle, and of which light transmittance changes according to a value of voltage; and a rear view mirror which insures a rear view of the vehicle. The rear view mirror has a front light receiving sensor which measures illumination intensity of the sunlight which enters from the front of the vehicle, a rear light receiving sensor which measures illumination intensity inside the vehicle, and a circuit board which controls voltage to be applied to the light controlling sheet. When a combination of the illumination intensity of the sunlight received by the front light receiving sensor and the illumination intensity inside the vehicle received by the rear light receiving sensor is a combination stored in storage unit in advance, the circuit board applies voltage to the light controlling sheet.
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