Cathode ray tube and deflection aberration correcting method of

Details Cathode ray tube and deflection aberration correcting method of Cathode ray tube and deflection aberration correcting method of

1994-01-13

1996-12-17

Oberley, Alvin E.

Electric lamp and discharge devices

Cathode ray tube

Plural beam generating or control

313414, H01J 2950

Patent

active

055856900

ABSTRACT:
A cathode ray tube which is equipped with an electron gun having a construction capable of not only improving the focusing characteristics for the entire region of a screen and for the total current range of an electron beam without any supply of a dynamic focusing voltage to achieve a satisfactory resolution but also reducing the Moire phenomena in a low current range. Also disclosed is a method of correcting the deflection aberration of the cathode ray tube. A deflection aberration according to the deflection of the electron beam is corrected by establishing a fixed inhomogeneous electric field, which has its equipotential lines narrowed in interval the more for the longer distance from the axis of symmetry of an electric field.

REFERENCES:
patent: 4374341 (1983-02-01), Say
patent: 4701678 (1987-10-01), Blacker et al.
patent: 4710672 (1987-12-01), Van Tol
patent: 4766344 (1988-08-01), Say
patent: 5066887 (1991-11-01), New
patent: 5285130 (1994-02-01), Takayama
patent: 5384512 (1995-01-01), Kamohara et al.
patent: 5386178 (1995-01-01), Son et al.

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