| 摘要 |
PURPOSE:To decrease the time required for discharging unnecessary electric charge, by providing a drain in a charge transfer section. CONSTITUTION:When a shutter button is depressed, a drive control circuit 20 drives charges to drains D1-DN for column transfer sections C1- CN. The charges transferred to the drains D1-DN are discharged externally via a terminal 36. Simltaneously, the circuit 20 drives charges to a row transfer section 32 so that the charges are transferred to the terminal 36. Thus, the unnecessary charges of rows and columns in the transfer section are discharged at the same time. After the discharge of unnecessary charges is finished, an optical shutter is opened. Since the time required for the discharge through the simultaneous discharge of the unnecessary charges can be decreased, shutter chance can easily be obtained. |
