| 摘要 |
PROBLEM TO BE SOLVED: To prevent luminance unevenness when viewing from a diagonal direction. SOLUTION: A light source controller 32 determines back light luminance BL<SB>i, j</SB>from the display luminance PN<SB>i, j</SB>of a block A<SB>i, j</SB>supplied from a display luminance calculation section 31. A light source controller 32 calculates the back light luminance BL<SB>i, j</SB>so as to attain less than the prescribed value for the absolute value of the value subtracted 1 from the back light lighting ratio r being the ratio of the back light set values of the adjacent blocks to each other when determining the back light luminance BL<SB>i, j</SB>. Then, the light source controller 32 controls the back light 12 so as to attain the calculated back light luminance BL<SB>i, j</SB>. The invention is applicable, for example, to the back light controller for controlling the back light of the liquid crystal display device. COPYRIGHT: (C)2008,JPO&INPIT
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