Title:
CATHODE RAY TUBE
Document Type and Number:
Japanese Patent JPS6023936
Kind Code:
A
Abstract:
A cathode-ray tube has an electron gun for use with an estigmatic magnetic deflection yoke, which comprises at least one cathode for generating at least one electron beam along a beam path toward a screen of the tube. The electron gun includes a beam forming portion proximate to the cathode and a main lens portion away therefrom. The beam forming portion comprises a plurality of electrodes, one of which is an astigmatic beam forming electrode which introduces a compensating asymmetry into the electron beam. The astigmatic beam forming electrode has a functional grid portion of a given thickness with at least one aperture (156) formed therethrough. The aperture is intersected by a slot (158) formed in the functional grid portion. The slot, which has a depth less than the thickness of the functional grid portion, extends across oppositely disposed sectors, preferably, quadrants, of the aperture.
Inventors:
ERITSUKU FURANSHISU HOTSUKINGU
Application Number:
JP13280884A
Publication Date:
February 06, 1985
Filing Date:
June 26, 1984
Export Citation:
Assignee:
RCA CORP
International Classes:
H01J29/48; H01J29/50; H01J31/20; (IPC1-7): H01J29/48; H01J29/50; H01J31/20
Attorney, Agent or Firm:
Satoshi Shimizu