Composite pane comprising a functional element having electrically controllable optical properties and having a concentration gradient of the active substance

US12162247B2 · kind B2 · utility

Assignee

• SAINT-GOBAIN GLASS FRANCE · FR

Inventors

• Marcel KLEIN · Baesweiler, DE
• Jefferson DO ROSARIO · Aachen, DE

Key dates

• Filing date: Sep 19, 2019
• Grant date: Dec 10, 2024
• Expiry date: Sep 12, 2041

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B32B2605/006
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

A composite pane includes a functional element having electrically controllable optical properties, includes an inner pane including an inner and outer side and an outer pane including an inner and outer side, a thermoplastic intermediate layer, which joins the inner side) of the inner pane to the inner side of the outer pane, a functional element embedded in the thermoplastic intermediate layer and having electrically controllable optical properties at least including a multilayer film containing, arranged surface-to-surface one above the other in this sequence, a first carrier film, a first surface electrode, an active layer, a second surface electrode, and a second carrier film. The active layer includes a matrix and an active substance, and the concentration of the active substance varies over the area of the functional element.