Photochromic light control mirror
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United States of America Patent
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-
Dec 13, 1994
Grant Date -
N/A
app pub date -
Jul 28, 1993
filing date -
Jul 28, 1993
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A photochromic light control mirror comprises a photochromic substrate having a reflective film deposited at one side thereof. Alternatively, a mirror (i.e., a layer of glass having a reflective film deposited at one side thereof) is coated with a photochromic coating. An ultraviolet light source illuminates the photochromic material to change the reflectance of the mirror. The reflectance can be manually controlled whereby the intensity of the light source is controlled by adjusting the voltage driving the light source. Alternatively, the reflectance can be automatically controlled whereby the intensity of the light source is controlled by a photo detector which varies the voltage driving the light source in response to detected light.
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