| 摘要 |
PROBLEM TO BE SOLVED: To enable to adjust white balance in a simpler structure. SOLUTION: A color sensor 43R, 43G, or 43B in a backlight 12 detects emission luminance of a red, green, or blue color in accordance with spectral sensitivity characteristics corresponding to a red, green, or blue color. To an operating part 61 of a light source control part 32, a value of a light-receiving signal taken in at a given timing supplied from each AD converter 44R, 44G, 44B is supplied from a sampling part 53. The operating part 61 finds a supply current value corrected by falling amount of light receiving sensitivity due to spectral sensitivity characteristics of the color sensor 43R, 43G, or 43B by approximating in a linear equation changing amount of light receiving sensitivity depending on changes of light wavelengths of each LED 41R, 41G, or 41B based on the spectral sensitivity characteristics. The idea can be applied for a backlight device of the liquid crystal display. COPYRIGHT: (C)2009,JPO&INPIT |
