| 摘要 |
A solid state image pickup apparatus can obtain a constant photoelectric transfer output even if an incident light intensity is very high, so that a signal processing circuit to be connected to an output of the apparatus can be simplified in configuration and only low voltage and low power are required. In the apparatus, an incident light intensity on a photoelectric transfer surface is detected, and a charge stored time is decreased in accordance with an increase in the incident light intensity. When the incident light intensity falls within a normal range, the transfer gate clock pulse is controlled to have a predetermined pulse width so as to allow transfer of the photoelectric transfer charge to the CCD shift register. Thus, a substantially constant photoelectric transfer output can be obtained. When the incident light intensity is high, the pulse width of the transfer gate clock is decreased. When the transfer gate clock pulse is controlled to have a short pulse width in this manner, a substantially constant photoelectric transfer output can be obtained irrespective of the incident light intensity.
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