Automatic exposure control apparatus and method

Details Automatic exposure control apparatus and method Automatic exposure control apparatus and method

2007-10-30

2007-10-30

Ye, Lin (Department: 2622)

Television

Camera, system and detail

Optics

C348S241000, C348S248000

Reexamination Certificate

active

10205457

ABSTRACT:
An automatic exposure (“AE”), control apparatus to prevent exposure errors resulting from “smear.” Image-capturing is performed at a single exposure time TI (I=1, 2, . . . n); a CCD output is applied with a CCD drive signal to perform an integrating operation for a signal in an AE area using an integration circuit, and then outputs integration value EI+SI at each exposure time. A shutter trigger operation presents readout of an exposure value. An integrator value En+Sn obtained just before the shutter trigger operation, and a smear value Sn′ obtained just after the shutter trigger operation are provided to an exposure operation/control circuit. The exposure operation/control circuit then performs an AE operation to receive En+Sn−Sn≈En and compares the value to a target value for determining exposure conditions, and provides an AE operation value containing almost no smear component to determine an appropriate exposure condition.

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