Tilt compensation circuit for picture tubes

Electric lamp and discharge devices: systems – Cathode ray tube circuits – Pulse storing

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

315370, 361150, H04N 929

Patent

active

058251316

ABSTRACT:
A tilt compensation circuit for a picture tube is provided to correct an image rotation phenomenon of a currently displayed image on a screen caused by an outer interference such as terrestrial magnetism. In the picture tube, an alternating current for driving the tube is applied to a power supply circuit for voltage conversion through an AC line filter and to a degaussing coil as well. The circuit includes a tilt adjustment circuit for comparing a tilt compensation control signal of a predetermined voltage level with a voltage feedback signal from the degaussing coil thereby generating current corresponding the difference therebetween. The circuit further includes a switching circuit responsive to a state of the tilt compensation control signal for selectively switching between a first circuit loop incorporating the AC line filter and the degaussing coil and a second loop incorporating the tilt adjustment circuit and the degaussing coil. The tilt compensation circuit alternatively performs either an operation of an electromagnetic field elimination or a tilt compensation operation. Accordingly, no additional tilt coil is required to add on existing apparatus but only using a degaussing coil for use with the tilt compensation circuit for a picture tube.

REFERENCES:
patent: 4908550 (1990-03-01), Chase et al.
patent: 5021712 (1991-06-01), Sands et al.
patent: 5170096 (1992-12-01), Kang et al.
patent: 5488270 (1996-01-01), Takita et al.
patent: 5499156 (1996-03-01), Bentley
patent: 5508588 (1996-04-01), Wu

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Tilt compensation circuit for picture tubes does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Tilt compensation circuit for picture tubes, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Tilt compensation circuit for picture tubes will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-247809

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.