Electrochemical pixel device

US6642069B2 · kind B2 · utility

Assignee

• Acreo AB · SE

Inventors

• Marten Armgarth · Linköping, SE
• Karl P. Andersson · Norrköping, SE
• David Nilsson · Vikingstad, SE
• Rolf M. Berggren · Vreta kloster, SE
• Thomas Kugler · Cambridge, GB
• Tommi Remonen · Nyköping, SE

Key dates

• Filing date: Mar 7, 2002
• Grant date: Nov 4, 2003
• Expiry date: Mar 7, 2022

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10K85/1135
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A pixel device comprising an electrochemical transistor device with a source and a drain contact; a gate electrode; an electrochemically active element in direct electrical contact with source and drain contacts, and comprising a transistor channel comprising an organic material; and a solidified electrolyte in direct electrical contact with the active element, and an electrochromic device comprising an electrochromic element comprising a material conducting in at least one oxidation state and an electrochromic material; a solidified electrolyte layer in direct electrical contact with the electrochromic element; and two electrodes for application of a voltage and in direct electrical contact with a component selected from the electrolyte layer(s); in which one of the source and drain contacts of the electrochemical transistor device is in electrical contact with one of the electrodes of the electrochromic device. Also provided are matrices of pixel devices, pixelated displays incorporating the matrices, and process thereof.