| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an effective responsiveness to any significant temperature change or abrupt temperature change, thereby preventing any troubles. <P>SOLUTION: Temperature detection is effected in ranges at three ranks set by a temperature detecting circuit 107, and based on the detection result, an indicative signal indicating the corresponding one of the temperature ranges to which the detected temperature belongs is generated and is supplied to an output voltage setting section 108. The output voltage setting section 108 changes a dividing ratio of resistances R1 and R2 based on the indicative signal, controls a signal input to an amplifier 102 which generates a voltage control signal, and changes an output voltage. The change of the output voltage is effected in a blanking period having no influence on imaging of an effective region, after output of a vertical synchronizing signal XVS at the head of a frame and before start of imaging operation in an effective pixel region. Thus, voltage change operation without affecting the image can be assured. <P>COPYRIGHT: (C)2008,JPO&INPIT |
