| 摘要 |
In a CCD solid-state image pickup device comprising a plurality of photosensitive elements arranged in a plurality of parallel columns, a vertical shift register adjacent to each column of the photosensitive elements, and a horizontal shift register coupled to the vertical shift register, a drain shift register is coupled to a drain circuit to drain disused charges accumulated in the photosensitive elements in each vertical blanking time period except for a specific time period of the vertical blanking time period. The drain shift register may be coupled to the photosensitive elements of each column through a plurality of drain transfer gates. Alternatively, the drain shift register may be coupled to the photosensitive elements through the vertical shift register. The drain shift register may be coupled to the drain circuit either directly or through the horizontal shift register.
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