Patent ID: 9341886
Filing Date: 2016-05-17
CPC Classification: G02F,G09G

Claim Text:
1. An image display device comprising: a liquid crystal panel section performing sequentially scanning in a predetermined direction in synchronization with an image signal to convert the transmittance of light according to the gray scale level of said image signal; a light source section including a plurality of light source elements divided into a plurality of regions, each of said plurality of light source elements being capable of turning on red, green, and blue lights; a light detection section detecting the light intensity of said light source section; a light source control section controlling the light emission intensity of said light source section based on the light detection value detected by said light detection section; and a timing generation section generating a light emission drive signal allowing said light source section to emit light and a light detection gate signal allowing said light detection section to detect the light intensity of said light source section, based on an image reference signal included in said image signal, wherein said timing generation section generates said light emission drive signal which turns on each of said regions of said light source section according to said scanning in said liquid crystal panel section, and which causes the red, green, and blue lights of all of said light source elements to be simultaneously turned on to cause all said regions of said light source section to be simultaneously turned on during a predetermined period in the middle of a turning-on period according to said scanning, and generates said light detection gate signal allowing the detection of said light detection section to be effective only in said predetermined period during which all said regions are simultaneously turned on.