The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 10, 2000
Filed:
Jun. 01, 1998
Frank James Cava, Burlingame, CA (US);
Other;
Abstract
Electrochromic device and method. In one disclosed embodiment, an electrochromic coating is applied to a light transmissive substrate, and a first control voltage is generated in accordance with the amount of light impinging upon the substrate. That control voltage is applied to the electrochromic coating to decrease the transmittance of the substrate as the light increases. Ambient light conditions are monitored to provide a second control voltage which is applied to the electrochromic coating to decrease the transmittance of the substrate when the ambient light falls below a predetermined level, e.g. at night. In other disclosed embodiments, the electrochromic coating is applied to the lenses of a pair of glasses and to a lamp shade, with photovoltaic cells for controlling the transmittance of the coating in accordance with the amount of impinging light.