Screen-noise eliminating apparatus and cathode-ray tube...

Details Screen-noise eliminating apparatus and cathode-ray tube... Screen-noise eliminating apparatus and cathode-ray tube...

2005-03-22

2005-03-22

Lee, Michael H. (Department: 2614)

Television

Image signal processing circuitry specific to television

Transition or edge sharpeners

C348S607000, C348S382000, C348S380000

Reexamination Certificate

active

06870575

ABSTRACT:
A screen-noise eliminating apparatus including beam-spot-length control means for increasing or decreasing the vertical length of a beam spot on a display screen generated by an electron of a cathode-ray tube for displaying a TV signal; vertical enhancement means for enhancing a given vertical-direction spatial frequency characteristic of said TV signal; and noised elimination control means for controlling said beam-spot-length control means and said vertical enhancement means so as to compensate according to the increase of decrease of said beam spot length.

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