System for detecting defective photosensors in an image sensor a

Details System for detecting defective photosensors in an image sensor a System for detecting defective photosensors in an image sensor a

1997-09-22

2000-10-17

Ho, Tuan

Television

Camera, system and detail

Combined image signal generator and general image signal...

250214R, 250207, H04N 964

Patent

active

061339520

ABSTRACT:
A test circuit incorporated as part of an image sensor array having a plurality of image sensors and associated transfer circuits includes a test line associated with each photosensor. In a test mode, a signal output from a photosensor can be substituted with a predetermined voltage from an external source. By providing a predetermined test voltage to the transfer circuits and then reading out signals from the transfer circuits, faults in the transfer circuits can be isolated from faults in the photosensors.

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patent: 5452001 (1995-09-01), Hosier et al.
patent: 5638121 (1997-06-01), Hosier et al.
patent: 6054704 (2000-04-01), Prichard et al.
patent: 6061093 (2000-05-01), Yonemoto

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