Solid-state image pickup exposure control system and method

Details Solid-state image pickup exposure control system and method Solid-state image pickup exposure control system and method

2007-04-10

2007-04-10

Srivastava, Vivek (Department: 2622)

Television

Camera, system and detail

Solid-state image sensor

C348S155000

Reexamination Certificate

active

10192054

ABSTRACT:
If image data of a prior frame and image data of a current frame are compared with each other, a resulting image appears doubled because the distance of travel of an object within one frame becomes long when the object moves quickly.In a focal-plane shutter type CMOS imager which performs exposure row by row, a shutter scanning circuit32performs exposure twice with exposure time divided into two durations on one pixel11in a pixel section21. Signals based on the two exposure durations from the one pixel are read through respective vertical signal lines25and26under the control of vertical scanning circuits30and31. The two signals are then synchronized through the delay circuit42, and a difference between the two signals is determined through the subtracter43, and the difference signal is output. The motion of an object is detected based on the difference signal.

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