Spherical aberration-corrected inline electron gun

Details Spherical aberration-corrected inline electron gun Spherical aberration-corrected inline electron gun

Filed on

1989-11-15

Date issued

1991-08-27

Examiner

O'Shea, Sandra L.

Patent Class

Electric lamp and discharge devices

SubClass

Cathode ray tube

SubSubClass

Plural beam generating or control

Other Related Categories

313449, H01J 2948

Type

Patent

Status

active

Patent number

050436252

Description

ABSTRACT:
An inline electron gun for a multi-beam color cathode ray tube (CRT) corrects for green (center) electron beam vertical spherical aberration by enlarging the vertical dimension of the center portions of common lens apertures in adjacent grids in the electron gun. Increasing the vertical dimension of that portion of each of the aforementioned grid apertures through which the green electron beam transits reduces the vertical spot size of the green beam without degrading other electron gun operating characteristics. The inventive grid aperture arrangement is particularly adapted for use in a combined optimum tube and yoke (COTY) color CRT.

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10.2; Progressive-Scanned 33-in. 110.degree. Flat-Square Color CRT, Suzuki et al., pp. 166-169, SID 87 Digest.
2.1 In-Line Gun with Dynamic Astigmatism and Focus Correction, Ashizaki et al., pp. 44-47, Japan Display, '86.
10.1 Quadrupole Lens for Dynamic Focus and Astigmatism Control in an Eliptical Aperture Lens Gun, Shirai et al., pp. 162-165, SID 87 Digest.
8.5 Dynamic Astigmatism Control Quadra Potential Focus Gun for 22-in. Flat Square Color Display Tube, Katsuma et al., pp. 136-139, SID 88 Digest.
P1.13 An In-Line Color CRT with Dynamic Beam Shaping for Data Display, Yamane et al., pp. 160-163, Japan Display, '86.
An In-Line Gun for High-Resolution Color Display, H. Y. Chen, pp. 123-127, Proceedings of the SID, vol. 23/3, 1982.
THPM 10.1: A New Generation of Color CRT Electron Gun Design, Chen et al., pp. 126-127, ICCE 83/Jun. 9, 1983, Digest of Technical Papers.
An Overview of the COTY-29 Tube System/An Improved Generation of Color Picture Tubes, Morrell, pp. 290-295, IEEE Transactions on Consumer Electronics, vol. CE-28, No. 3, Aug. 1982.

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