Controlled transparency

US4887890A · kind A · utility

Assignee

• Dornier System GmbH

Inventors

• Werner Scherber · Bermatingen, DE
• Thomas Meisel · Troutville, US

Key dates

• Filing date: Dec 21, 1987
• Grant date: Dec 19, 1989
• Expiry date: Dec 21, 2007

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02T10/88
• WIPO field: Control
• WIPO sector: Instruments

Abstract

Pane or foil with controllable transparency and light transmission comprises a layer configuration between two transparent carriers such as glass panes, foils or the like; transparent electrodes are disposed on the carriers; a tansparent electrolyte and an active polymer layer are disposed between the electrodes; the active polymer layer has light absorption in the visible spectrum range characterized by a variation in the case of a reversible chemical doping reaction; preferably an additional transparent layer is included to serve as reversible source for storage and yielding of ions, the additional layer is juxtaposed to the electrolyte.