Video display device

Abstract

Abstract PURPOSE:To prevent variance in brightness and chromaticity on a screen by providing n arithmetic means which processes video data of each liquid crystal panel and data on the uniformity ratio of illuminance stored in a storage means to obtain the corrected video data of video data. CONSTITUTION:The data on the uniformity rate of illuminance of each liquid crystal panel 1 which is obtained through the arithmetic processing of a CPU 9 is written in a memory 12 of RAM constitution by a writing circuit 11 according to the address specification of an address selector 10. The uniformity rate data stored in memory 12 by colors R, G and B corresponding to a color display are multiplied by a multiplier 7 by the chromatic components of R, G and B and uniformity rate data under the control based upon a read address signal and a multiplication timing signal from a timing generator 5, thereby obtaining the corrected video data. This corrected video data is outputted to the respective panels 1 of a liquid crystal display board 2 and displayed. Consequently, variance in brightness and variance in chromaticity among the panels are eliminated.

Inventors

• 👤 Mitsuhiro Hamaguchi
• 👤 浜口　光洋
• 👤 Shinji Oota
• 👤 慎二 太田

Bibliographic Details