Title:
CONVERGENCE APPARATUS AND DEFLECTING YOKE
Document Type and Number:
Japanese Patent JP3835875
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To heighten the magnetic flux density at the corners of a screen of a cathode-ray tube and correct comatic miss convergence by negative differentiation by installing a plurality of arc-like shunts in a first face of a rear cover of a deflecting yoke on the opposite to the screen.
SOLUTION: Arc like shunts 100 are made of a ceramic having specific permeability, for example, 1000 and stuck to grooves 115 formed in a rear cover 35 of a self-convergence deflecting yoke by a synthetic resin and rubber glue. The curvature of the inner arc of the shunts 100 is made similar to the outer circumference of a neck part 105 of a cathode ray tube, so that the magnetic fields near the corners of a screen where the magnetic flux density in the end part of a vertical magnetic field which is curved in horizontal direction is necessary to be heightened and corrected can be strengthened. A C-shaped shunt 100 set along the outer circumference of the neck part 105 strengthens the function of a barrel magnetic field at a corner part without affecting the barrel magnetic field near the x axis and greatly corrects the magnetic field at a corner in the screen in the right direction.
Inventors:
Kent El Headley
Application Number:
JP3806397A
Publication Date:
October 18, 2006
Filing Date:
February 21, 1997
Export Citation:
Assignee:
Sony electronics ink
International Classes:
H01J29/54; H01J29/56; H01J29/76; (IPC1-7): H01J29/54; H01J29/76
Domestic Patent References:
| JP3126350U | ||||
| JP4018957U | ||||
| JP5092946U | ||||
| JP54177826U |
Attorney, Agent or Firm:
Akira Koike
Eiichi Tamura
Seiji Iga
Eiichi Tamura
Seiji Iga