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:
Jan. 04, 2000
Filed:
Apr. 13, 1998
U.S. Philips Corporation, New York, NY (US);
Abstract
The electrochromic element (20) comprises a substrate (28) and an electrochromic layer (25) having a thickness d on the basis of a metal oxide selected from the group formed by tungsten oxide, molybdenum oxide, niobium oxide, manganese oxide and zirconium oxide, or combinations thereof. The electrochromic layer (25) is characterized in that the oxygen content in the layer (25) varies across the thickness d of the layer (25). Preferably, the variation of the oxygen content in the layer (25) comprises at least two local maxima and a local minimum. Preferably, the electrochromic layer (25) is composed of a plurality of sub-layers (25', 25', 25''), with the variation of the oxygen content in the layer (25) occurring predominantly at the location of transitions between two sub-layers. Preferably, the electrochromic layer (25) comprises the metal oxide tungsten oxide WO.sub.x. The electrochromic element may be provided on the display screen of a display device. A description is given of a method of manufacturing the electrochromic layer (25).
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile