Image sensitivity for shuttered solid-state imager television ca

Details Image sensitivity for shuttered solid-state imager television ca Image sensitivity for shuttered solid-state imager television ca

1984-04-27

1986-06-24

Rubinson, Gene Z.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358213, H04N 530

Patent

active

045970157

ABSTRACT:
A television camera includes a solid-state imager which forms a signal representative of an image during an integration interval. The integration interval is followed by a pull-down interval during which the integrated signal is transferred out of the photo-responsive region of the solid state imager. A first shutter is provided which periodically prevents light from falling upon the photo-responsive region of the imager during the pull-down interval. A second shutter in combination with the first shutter is controllable for limiting the light passage during the integration interval. With this shutter arrangement, the dynamic resolution of the camera is increased at the expense of image sensitivity. By the present invention, means are provided for precisely controlling the second shutter such that image sensitivity can be restored when desired.

REFERENCES:
patent: 4161000 (1979-07-01), Cleveland
patent: 4171529 (1979-10-01), Silberberg et al.
patent: 4301476 (1981-11-01), Keller
patent: 4363034 (1982-12-01), Grancoin et al.
patent: 4504866 (1985-03-01), Saito
U.S. Patent Appln. SN 575,570, filed 1/31/84 in names of S. L. Bendell & C. A. Johnson entitled: Exposure Time Control for a Solid-State Color Camera.

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