Video camera shutter control by charge accumulation time of CCD

Details Video camera shutter control by charge accumulation time of CCD Video camera shutter control by charge accumulation time of CCD

1990-01-08

1991-01-08

Groody, James J.

Facsimile and static presentation processing

Facsimile

Recording apparatus

35821319, 35821311, A04N 315, A04N 5335

Patent

active

049840029

ABSTRACT:
In a charge-coupled imager in which an electronic shutter is controlled by varying an effective charge accumulating time of a charge-coupled device, according to this invention, the accumulation is started in synchronism with the trigger signal applied from the outside, the charge is accumulated only during a period of time determined by the shutter speed setting signal, and the accumulated charge is read out, whereby the charge accumulating time (exposure time) can be varied in such a manner that the starting of exposure time is made constant while its ending is varied. Therefore, the charge-coupled imager of inter-line transfer type of the invention can be made inexpensive and applied to a video processing apparatus such as a so-called machine-vision in which man's visual sense is not assumed.

REFERENCES:
patent: 4504866 (1985-03-01), Saito
patent: 4603354 (1986-07-01), Hashimoto et al.
patent: 4686572 (1987-08-01), Takatsu
patent: 4763196 (1988-08-01), Sakai

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