Electronic still camera which reduces the influence of smear and

Details Electronic still camera which reduces the influence of smear and Electronic still camera which reduces the influence of smear and

1991-02-15

1992-10-06

Razavi, Michael

Facsimile and static presentation processing

Facsimile

Recording apparatus

35821316, 35821311, 35821324, H04N 5335

Patent

active

051537320

ABSTRACT:
An electronic still camera uses a charge coupled solid-state image pickup device and reads out pixel signals from photoelectric conversion elements by separating the photoelectric conversion elements into a number of fields. In a first embodiment, the elements are separated into k number of fields and an empty reading operation of the vertical and horizontal charge transfer paths are implemented without field shifting pixel signals from the elements to the transfer paths to thereby preserve the pixel signals in the elements. Accordingly, smear contents are removed and the influence of dark current is made uniform to prevent the occurrence of flicker. In a second embodiment, an empty reading operation of the vertical and horizontal charge transfer paths is implemented just after exposure. After the empty reading operation, normal field scanning and reading operation is restarted from the pixel signals corresponding to the field where the field shifting operation is stopped. Accordingly, smear contents are removed and dark current is made uniform.

REFERENCES:
patent: 4496982 (1985-01-01), Levine
patent: 4578707 (1986-03-01), Ozawa et al.
patent: 4580168 (1986-04-01), Levine
patent: 4700231 (1987-10-01), Matsumoto
patent: 4777519 (1988-10-01), Oshima
patent: 4985775 (1991-01-01), Murayama et al.
patent: 5003398 (1991-03-01), Suzuki
patent: 5049996 (1991-09-01), Kaneko et al.

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