Flat cathode ray tube with keystone compensation

Details Flat cathode ray tube with keystone compensation Flat cathode ray tube with keystone compensation

1982-12-30

1984-12-25

Blum, Theodore M.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

315370, 313422, H01J 2970, H01J 2972

Patent

active

044906528

ABSTRACT:
Apparatus for compensating for keystone distortion in a flat cathode ray tube in a relatively straightforward and inexpensive manner, and for providing a tube having relatively high resolution and reduced deflection aberration. A magnetic deflection yoke is utilized to scan the raster on the screen, and corrective deflective forces are provided on the electron beam to compensate for keystone. In a first embodiment, the corrective forces are provided by a magnetic hexapole field, in second and third embodiments by magnetic quadrapole fields in series with horizontal and vertical deflections respectively, and in a fourth embodiment by providing the combination of a hexapole field and orthogonal quadrapole field in series with horizontal and vertical deflections respectively.

REFERENCES:
patent: 2455977 (1948-12-01), Bocciarelli
patent: 2957097 (1960-10-01), Schagen et al.
patent: 2989584 (1961-06-01), Mengle
patent: 3299314 (1967-01-01), Yamada et al.
patent: 3793554 (1974-02-01), Rossaert
patent: 3890541 (1975-06-01), McCarthy et al.

Affiliated with

Also associated with

Rating

Flat cathode ray tube with keystone compensation does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Flat cathode ray tube with keystone compensation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Flat cathode ray tube with keystone compensation will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1154810