| 摘要 |
Disclosed here is a frame-cyclic noise reduction employed for an image display device in which one field is divided into a plurality of sub-fields, and turned-on sub-fields are properly combined to provide image with gradation. The device detects an area where an edge portion of image becomes unclear, i.e., where sub-field fuzziness becomes worse, and controls a cyclic amount for the area in which sub-field fuzziness becomes worse so as to be different from that for other area, thereby decreasing noise.
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