JPS6489770A - Electronic still camera - Google Patents

Abstract

PURPOSE:To obtain the excellent reproduced picture of the title electronic still camera with a simple circuit constitution by performing an operation based on plural output signals obtained in accordance with the shutter speed of a light receiving sensor, and constituting the circuit so that the output signal (a picture signal) for one picture portion with an extended dinamic range may be obtained based on the operation contents. CONSTITUTION:When one mechanical operation is performed per the shutter button of an electronic still camera 1, first, the low-speed electronic shutter operation is performed, and at such a time, a switch SW is automatically switched as is shown by a full line. At the time of the low-speed shutter, an output signal S1 is obtained from a sensor 3, and it is supplied through the switch SW to a memory circuit 6. The output signal of the memory circuit 6 is supplied to one input terminal of an adder circuit 7. Further, at the time of the high-speed shutter operation, an output signal S2 is obtained from the sensor 3, and it is supplied through the switch SW to an offset circuit 8. The reference level of the output signal S2 is raised by an offset voltage set beforehand, and the output signal S2 is supplied to the other input terminal of the adder circuit 7.