Optical detector of projection television

Television – Monitoring – testing – or measuring – Testing of image reproducer

Reexamination Certificate

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Details

C348S189000, C348S745000

Reexamination Certificate

active

07420591

ABSTRACT:
An optical detector is provided. The optical detector allows an auto-convergence control to be effectively made by cutting off external light incident to an optical sensor for use in the auto-convergence of a projection TV. The optical detector includes optical sensors and external light cut-off units. The optical sensors are positioned in an inside of the projection TV to receive test signals. The external light cut-off units are protruded to a direction to which the test signals are incident.

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European Office Action dated Feb. 1, 2007.
European Office Action dated Jan. 29, 2008.

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