| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a backlight apparatus which allows brightness control with minimum image quality deterioration. Ž<P>SOLUTION: The backlight apparatus has: an illuminating section (20) that radiates illuminating light on a liquid crystal panel (10); a brightness determining section (30) that determines the light emission brightness value of the illuminating section (20) and updates the light emitting state of the illuminating section (20), on the basis of the light emission brightness value; and an update controller (40) that controls timing to update the light emission brightness value, and the illuminating section (20) has a plurality of light emitting areas illuminating each of a plurality of image display areas, the brightness determining section(30) determines the light emission brightness value of the first image display area, from values obtained by applying weights to the first information based on the input image signal of the first image display area and the second information based on the input image signal of the second image display areas, and the update controller (40) makes the brightness determining section (30) update the respective light emitting states of a plurality of light emitting areas by a plurality of times each during a period when all image display areas of the liquid crystal panel (10) are scanned once by an input image signal. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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