Liquid crystal projector using a spatial light modulator and two rotating color filters

U.S. Patent Number: 5805243

Abstract: A liquid crystal display apparatus which includes: a light-addressed liquid crystal light valve including a photoconductive layer and a liquid crystal layer between a pair of light transmitting substrates, each of the light transmitting substrates having an electrode for applying a voltage across the photoconductive layer and the liquid crystal layer; a writing unit for writing an image of a display medium in the light-addressed liquid crystal light valve with writing light from the display medium through a writing lens; a projecting unit for projecting the image written in the light-addressed liquid crystal light valve by irradiating reading light from a projection light source to the light-addressed liquid crystal light valve; and a controlling unit for controlling at least one of operational characteristics of the light-addressed liquid crystal light valve and a luminance of the writing light in accordance with a luminance of the display medium, is disclosed.

Inventors: Hatano; Akitsugu (Nara, JP), Hamada; Hiroshi (Nara, JP)

Assignee: Sharp Kabushiki Kaisha (Osaka, JP)

Application Number: 08/628,475

Issued: 1998-09-08

Expired: 2006-09-08

Classes: 349/5 ; 349/106; 349/25; 349/7; 352/42; 353/84

Field of search: 359/40,41,72 349/5,6,106,25,7 352/42 353/84

Click the image above to view patent images at uspto.gov within a frame.

Click here for the fulltext page on uspto.gov within a frame.