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:
Mar. 01, 1977
Filed:
Jul. 11, 1975
Brian Wilfred Faughnan, Princeton, NJ (US);
Richard Seely Crandall, Princeton, NJ (US);
RCA Corporation, New York, NY (US);
Abstract
An electrochromic device includes a layer of electrochromic material, such as tungsten oxide. The electrochromic material includes a dopant, such as molybdenum oxide. A sufficient amount of the dopant, for example, 2% by atomic weight, functions to shift the natural color center absorption peak of the electrochromic layer. Due to the shift of the color center absorption peak, coloration of the layer of electrochromic material exhibits an improved match to the spectral sensitivity of the human eye. Consequently, less electrical energy is required to operate the device at satisfactory viewing levels as compared to conventional devices where the color center absorption peak is less closely matched to the spectral sensitivity of the human eye.