| 摘要 |
The read processing time of a single screen is shortened by allowing the processing cycles for the rows to partially overlap with each other, the reset period, the pre-charge period and the read period are prevented from being overlapped in time with each other, making it possible to perform the read operation accurately. Also, in the drive control method above, the charge accumulating time for the rows is changed after the rows are reset simultaneously or successively, and the read operation is performed. As a result, it is possible to obtain an image read with the charge accumulating periods differing in an amount corresponding to the number of rows, i.e., with the detection sensitivities differing in an amount corresponding to the number of rows, by the read processing of a single screen, making it possible to extract the value of an optimum detection sensitivity based on the image data thus obtained.
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