Photochromic light control mirror
US5373392A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 28, 1993 |
| Grant date | Dec 13, 1994 |
| Priority date | — |
| Expiry date | Jul 28, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/0126
- WIPO fieldTransport
- WIPO sectorMechanical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.