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:
Aug. 29, 1995
Filed:
Oct. 31, 1994
Russell N Bennett, Catonsville, MD (US);
William E Kokonaski, Columbia, MD (US);
Michael J Hannan, Columbia, MD (US);
Larry G Boxall, Catonsville, MD (US);
Martin Marietta Corporation, Bethesda, MD (US);
Abstract
Display devices incorporating an improved working electrode are disclosed. The devices comprise a transparent outer layer, a first electrode having a reflective surface facing the transparent layer, an electrochromic material located between the reflective surface and the outer transparent layer, an electrolyte in contact with the electrochromic material and a second electrode located behind the first electrode. The first electrode is ion-permeable, allowing ions to pass through and contact the electrochromic material in order to alter the optical properties of the material. The electrochromic material is preferably a conductive polymer such, as polyaniline. The display devices are capable of changing reflectance and/or color by the application of an electric potential to the electrodes.