Patent Number: 6,295,113

Title: Twisted nematic color liquid crystal display

Abstract: A twisted nematic color liquid crystal display. The liquid crystal display comprises parallel glass substrates covered by a transparent electrode and an alignment film, a twisted nematic liquid crystal between the glass substrates, a retardation layer and polarizers. Between the glass substrates, a liquid crystal unit which forms the liquid crystal has a twist angle about 70 to about 180 about degree while free of an externally applying voltage. A product of anisotropy of refractive index for the twisted nematic liquid crystal .DELTA.n and the thickness d thereof, that is, .DELTA.n.multidot.d, is set in a range between about 1100 .ANG. to about 2000 .ANG.. Without using a passive device such as an external color light source or color filter, a multi-color or full color display is formed by an active controlling method of birefringence of electric field via applying a voltage on the transparent electrode.

Inventors: Yang; Chiu-Lien (Taipei Hsien, TW)

Assignee: Picvue Electronics, Ltd.

International Classification: G02F 1/13 (20060101); G02F 1/139 (20060101); G02F 001/139 (); G02F 001/133 ()

Expiration Date: 09/25/2018