Electrochromic contrast-plate

US6344918B1 · kind B1 · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Horst Berneth · Leverkusen, DE
• Wolfgang Jacobsen · Berlin, DE
• Serguei Kostromine · Rheinbach, DE
• Ralf Neigl · Leverkusen, DE

Key dates

• Filing date: Apr 14, 1999
• Grant date: Feb 5, 2002
• Expiry date: Apr 14, 2019

Classification

• Technology area (CPC G): Physics
• CPC primary: G06F3/0421
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The invention relates to an electrochromic contrast plate which is either arranged as a discrete unit in front of the screen or is connected to the outer surface of the screen through a common sheet, consisting of a pair of transparent glass or plastic sheets which are provided, on one side each, with an electroconductive, transparent coating, and which are joined together on the sides of their conductive coating via a sealing ring, and in which the volume formed by the two sheets and the sealing ring is filled with an electrochronic medium, characterized in that the electrochromic medium is a liquid, a gel or a polymer. The invention furthermore relates to an electrochromic contrast plate with integrated touch screen which has a larger base area than the area of the screen, and, at at least one of the faces of the outer sheet (outer plate) of the electrochromic contrast plate, a radiation source is arranged whose light enters the outer plate and illuminates it, and, at the inner sheet (carrier plate), in the region which projects beyond the screen area, a photodetector is mounted in whose photosensitive solid-angle region part or all of the carrier plate is located, if it projects…