Electron gun assembly of color ray tube

Details Electron gun assembly of color ray tube Electron gun assembly of color ray tube

1990-02-23

1990-10-30

Issing, Gregory C.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

315 15, 313414, 313437, H01J 2938, H01J 2946, H01J 2950, H01J 2974

Patent

active

049671200

ABSTRACT:
In an electron gun assembly of an in-line type, electron beams emitted from cathode pass through first, second and third grid electrodes and are accelerated and controlled by the electrodes. The accelerated and controlled electron beams are converged by a fourth grid electrode structure and are also focused on the phosphor screen by fifth and sixth grid electrodes. The fourth grid electrode structure is comprised of first to third electrode segments having apertures through which electron beams pass. The first and third electrode segments is maintained at a variable potential which is varied in accordance with a deflection of the electron beams and the second electrode segment is maintained at a constant potential.

REFERENCES:
patent: 4288718 (1981-09-01), Blacker et al.
patent: 4742279 (1988-05-01), Gerritsen et al.
Japanese Abstract vol. 10, No. 244 (E-430) (2300) Aug. 22, 1986.
Shirai et al., "Quadrupole Lens for Dynamic Focus and Astigmatison Control in an Elliptical Aperture Lens Gun" SID 87 Digest pp. 162-165, 1987.

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