| 摘要 |
PROBLEM TO BE SOLVED: To provide an image which is high in contract, has no blooming, is excellent in S/N and has high definition by performing detection of an APL of a luminance signal and, on the basis of the detection result, optimally controlling a start point of a gamma correction circuit individually which operates the luminance signal and a speed modulation signal. SOLUTION: An APL of a luminance signal which is detected in an APL detection circuit 101 is transmitted to a microcomputer 11 through an IIC bus 104. The microcomputer 11 transmits a control signal to a speed modulation signal gamma correction circuit 12 and a luminance signal gamma correction circuit 13 through a start point control signal 111 of an optimal gamma correction circuit on the basis of information transmitted from the IIC bus 104. The speed modulation signal gamma correction circuit 12 and the luminance signal gamma correction circuit 13 are constituted so that they become optimal start points respectively by start point control signals 111 and 112 of the gamma correction circuit transmitted from the microcomputer 11.
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