Electric lamp and discharge devices – Cathode ray tube – Plural beam generating or control
Patent
1979-05-24
1981-09-08
Demeo, Palmer C.
Electric lamp and discharge devices
Cathode ray tube
Plural beam generating or control
29 2518, 313412, H01J 914, H01J 2962
Patent
active
042887186
ABSTRACT:
A television cathode ray picture tube has at least one electron gun for generating at least one electron beam for projecting at least one beam spot on the picture imaging screen of the tube. The gun has a plurality of differently electrically charged electrodes having facing sections comprising juxtaposed walls with coaxially aligned openings therethrough for passage of said beam, said walls defining at least one gap in which is established a beam-focusing electrostatic field. The tube is subject to influences which introduce an undesired distortion of the beam spot to the detriment of the quality of the image projected on the screen. The electron gun is characterized by at least one of the electrode walls being mechanically deformed in the perimeter of its opening to cause the field to be azimuthally asymmetrical about the opening. The mechanical deformation is effective to act on the beam in a sense tending to at least partially compensate for the undesired distortion of the beam spot.
REFERENCES:
patent: 3678316 (1972-07-01), Barten
patent: 3995194 (1976-11-01), Blacker, Jr. et al.
patent: 4050041 (1977-09-01), Schiecke
patent: 4058753 (1977-11-01), Blacker et al.
patent: 4086513 (1978-04-01), Evans, Jr.
patent: 4143293 (1979-06-01), Hosokoshi et al.
"Trinitron Color Picture Tube . . .", by S. Yoshida et al., IEEE Transactions on Broadcast and Television Receivers, Aug. 1974, vol. BTR-20, No. 3, pp. 193-199.
Blacker Allen P.
Ingle Arthur J.
Clarke, Jr. Ralph E.
DeMeo Palmer C.
Zenith Radio Corporation
LandOfFree
Means and method for beam spot distortion compensation in TV pic does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Means and method for beam spot distortion compensation in TV pic, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Means and method for beam spot distortion compensation in TV pic will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1194443