Radiant energy – Photocells; circuits and apparatus – Photocell controlled circuit
Reexamination Certificate
2008-04-22
2008-04-22
Luu, Thanh X (Department: 2878)
Radiant energy
Photocells; circuits and apparatus
Photocell controlled circuit
C315S082000
Reexamination Certificate
active
10855124
ABSTRACT:
Equipment on automotive vehicle is controlled by a system including at least one semiconductor light sensor having variable sensitivity to light. Each light sensor generates a light signal indicative of the intensity of light incident on the light sensor. Control logic varies the sensitivity of the light sensor and generates equipment control signals based on received light signals. Sensitivity of light sensors may be varied by changing the integration time for producing charge from light incident on light transducers, by selecting between light transducers of different sensitivity within the light sensor, by using a light transducer with a sensitivity that is a function of the amount of incident light, and the like. Controlled equipment includes devices such as automatically dimming rearview mirrors, headlamps, and moisture removal means.
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Bauer Frederick T.
Bechtel Jon H.
Fossum Eric R.
Knapp Robert C.
Nixon Robert H.
Gentex Corporation
Luu Thanh X
Price Heneveld Cooper DeWitt & Litton LLP
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