Optical impression of a PDLC vehicle pane through a combination of dark inner and outer stacks

US11807082B2 · kind B2 · utility

Assignee

• SAINT-GOBAIN GLASS FRANCE · FR

Inventors

• Florian Manz · Aachen, DE
• Michael Labrot · Aachen, DE
• Jefferson DO ROSARIO · Aachen, DE
• Valentin SCHULZ · Niederzier, DE

Key dates

• Filing date: Feb 4, 2019
• Grant date: Nov 7, 2023
• Expiry date: Apr 8, 2040

Classification

• Technology area (CPC G): Physics
• CPC primary: G02F2203/48
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

A vehicle pane, includes successively a) an outer glass pane, b) at least one laminated layer, c) a PDLC layer, including a polymer matrix, in which liquid crystal droplets are embedded, and in each case an electrically conductive layer on both sides of the polymer matrix, d) at least one laminated layer, and e) an inner glass pane. The TL(inside) is in the range from 5 to 46% and the TL(outside) is in the range from 20 to 73% and the TL(outside) is greater than or equal to TL(inside), wherein the TL(inside) is the light transmittance of an inner stack that is formed by the inner glass pane and the layers between the PDLC layer and the inner glass pane, and TL(outside) is the light transmittance of an outer stack that is formed by the outer glass pane and the layers between the PDLC layer and the outer glass pane.