Color display with thin gap liquid crystal

US6552704B2 · kind B2 · utility

Assignee

• Kopin Corporation · US

Inventors

• Matthew Zavracky · Plympton, US
• Wen-Foo Chern · Boise, US
• Hiap L. Ong · Hackettstown, US
• John C. C. Fan · Brookline, US
• Bor-Yeu Tsaur · Lexington, US
• Alan Richard · Wrentham, US

Key dates

• Filing date: Oct 31, 1997
• Grant date: Apr 22, 2003
• Expiry date: Oct 31, 2017

Classification

• Technology area (CPC G): Physics
• CPC primary: G09G2330/021
• WIPO field: Audio-visual technology
• WIPO sector: Electrical engineering

Abstract

An active matrix color sequential liquid crystal display has an active matrix circuit, a counterelectrode panel and an interposed layer of liquid crystal. The active matrix circuit has an array of transistor circuits formed in a first plane. Each transistor circuit is connected to a pixel electrode in an array of pixel electrodes having a small area. The counterelectrode panel extends in a second plane that is parallel to the first plane, such that the counterelectrode panel receives an applied voltage. The liquid crystal layer is interposed in a cavity between the two planes. In a preferred embodiment, an oxide layer extends over the pixel electrode array. The oxide can have a first thickness in a peripheral region around the array of the pixel electrodes and a thinner second thickness in a pixel electrode region extending over the array of pixel electrodes.