Solid-state photographic device having a charge storage element

Details Solid-state photographic device having a charge storage element Solid-state photographic device having a charge storage element

1998-12-01

2000-07-18

Munson, Gene M.

Electrical pulse counters, pulse dividers, or shift registers: c

Charge transfer device

Particular input or output means

257258, 257292, G11C 1928

Patent

active

060917938

ABSTRACT:
A solid-state photographic element that can perform electronic shutter action simultaneously for all pixels is disclosed. Each pixel includes a photoelectric converter (such as a photodiode), a first transfer gate, a charge storage element, a second transfer gate, an amplifier, and a reset element. All photodiodes are first reset, then the first transfer gates selected OFF at the same time and charges accumulate in all photodiodes simultaneously. After a predetermined shutter time has elapsed, the first transfer gates are selected ON at the same time and charges that accumulated in the photodiodes are transferred to the corresponding charge storage elements. Thereafter, first transfer gates are selected OFF. A vertical scanning circuit may then select second transfer gates ON sequentially for each row, so that charges accumulated in the charge storage elements are transferred to control regions of corresponding amplifiers. Charges, amplified by the amplifiers, are then stored in light signal output capacitors. Charges stored in light signal output capacitors are read as video signals by column by outputting from a horizontal scanning circuit.

REFERENCES:
patent: 4980735 (1990-12-01), Yamawaki
patent: 5563429 (1996-10-01), Isogai
patent: 5625210 (1997-04-01), Lee et al.
patent: 5847381 (1998-12-01), Isogai
patent: 5898196 (1999-04-01), Hook et al.
patent: 5903021 (1999-05-01), Lee et al.
patent: 5942774 (1999-08-01), Isogai et al.
patent: 5977576 (1999-11-01), Hamasaki

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