Liquid crystal cell

US3939556A · kind A · utility

Assignee

• COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES · FR

Inventors

• Joseph Borel · Échirolles, FR
• Louise Peccoud nee Toupillier · Le Pont-de-Claix, FR
• Jacques Robert · Le Mont-sur-Lausanne, CH

Key dates

• Filing date: Jun 7, 1974
• Grant date: Feb 24, 1976
• Expiry date: Jun 7, 1994

Classification

• Technology area (CPC G): Physics
• CPC primary: G02F1/1345
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A liquid crystal cell is made by covering a wafer with an electrode system. A second insulating and transparent wafer is covered with a second system of semi-transparent electrodes. A wall of controlled thickness is deposited on a wafer around a periphery thereof. A metallic thread is deposited on a wafer with the same perimeter as the wall. The wafers are applied to each other and heated to fuse the thread on the top of the wall to join and seal the wafers with a liquid crystal between them within the wall.