| 摘要 |
A feature detecting circuit 4 detects an average luminance, a white area value and a black area value of a video signal, and a control circuit 5 controls a contrast adjusting circuit 2 such that a contrast gain of the video signal is more moderately increased than decreased according to changes of the detected average luminance, white area value and black area value. As a result, a good video quality can be obtained upon both increasing and decreasing the contrast gain of the video signal to adjust the contrast of the video signal. |
