Image pickup device
专利汇可以提供Image pickup device专利检索，专利查询，专利分析的服务。并且PURPOSE: To simplify device circuits and to stabilize device operation by comparing a picture signal with a reference signal that was treated together with the picture signal for gain adjustment and that is to be inserted in the picture signal, by discriminating their gain levels, and by carrying out iris control in accordance with the discriminated gain levels.
CONSTITUTION: An output signal from CCD3 is input in a reference signal inserting circuit 19, where a reference signal to calculate a gain of AGC circuit 6 later is inserted in a picture signal in the duration of blanking the output signal. Next, after gain adjustment of the reference signal is completed by the AGC circuit 6, the reference signal passes through a clamp line 12, is converted by an A/D converter circuit 13 into a digital value, and input to a signal processing circuit 15 and control circuit 20. The control circuit 20 calculates in a detecting circuit 21 a gain of AGC circuit using a variation of the reference signal inserted in the reference signal inserting circuit 19 in the duration of blanking, and inputs in an arithmetic processing section 22 the gain in conjunction with an output signal of the A/D converter circuit 13. Based on these two data units, CPU18 makes the arithmetic processing section 22 carry out a predetermined processing to make the camera generate an iris control signal S1.
COPYRIGHT: (C)1992,JPO&Japio，下面是Image pickup device专利的具体信息内容。
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