Image sensor

Details Image sensor Image sensor

1997-11-25

2000-08-01

Coles, Edward L.

Facsimile and static presentation processing

Facsimile

Picture signal generator

348302, 348311, 348312, H04N 104

Patent

active

060975091

ABSTRACT:
An image sensor has a photoelectric conversion unit composed of an array of a plurality of sets of a photoelectric conversion element having one electrode connected to a power source line and a switching element connected to another electrode of the photoelectric conversion element to receive an output thereof. A shift register, operating in synchronism with a clock supplied thereto, generates a pulse to turn on the switching element. The current that the switching element outputs when turned on is stored in and converted into a voltage by a capacitor. When the switching element is turned on, a transistor that forms a discharging path for the capacitor is connected in parallel with the capacitor. This transistor is turned on with a pulse obtained by delaying the clock. Thus, the capacitor is cleared over a period including periods before and after the switching element is turned on.

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patent: 5933189 (1999-08-01), Nomura

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