| 摘要 |
PURPOSE:To effectively remove blooming without lowering an optical opening efficiency of an element by making a transistor means conductive a little on exposing a photosensitive means, and disposing an electric charge control means for eliminating an excessive electric charge generated on the photosensitive means. CONSTITUTION:From a control circuit not shown, control signals A, B, C are supplied to terminals, 56, 42, 40 at a predetermined timing and pulses HP and VP are fed to terminals 34 and 46. When a light incident to a photosensitive cell 10a is too strong, in a photodiode 2 of the cell 10a, an excessive photoelectrons are generated, a level of a cathode is lowered to a direction of negative to make conductive the diode 12. At this time, an insulating gate field effect transistor IGFET 14 is a little conductive, flows in the diode 12 through an IGFET 38 and the IGFET 14 of the cell 10a from a power source Vref of a terminal 58. Thereby, the excessive electric charge is connected again and eliminated and the generation of blooming is prevented in the reproduced image.
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