| 摘要 |
PURPOSE:To improve the blooming phenomenon and the picture quality, through the suppression of spread of spot optical image, by operating readout of signal charges of a photoelectric conversion element train after sweeping out a part of electric charges of saturated charges of the photoelectric conversion element train. CONSTITUTION:On a semiconductor substrate 20, a photoelectric conversion element 13 consisting of a junction photo diode, transfer electrodes 14, 16 and a photoelectric conversion element train consisting of a buried layer 15 are arranged. Before saturated charges 25 of the photoelectric conversion element overflow from a potential 23 under the transfer electrode 16 through the incidence of a light, a saturated exposure amount or over to the element 13, a part of the transfer electrode 16 is opened, allowing to sweep out charges 27 to be thrown away from the element 13. After a margin is provided for the element 13 to the charge 17 and a signal charge 28, the transfer electrode 16 is closed to read out the signal charge 28, allowing to suppress the spread of the spot optical image and improve the picture quality. |
