Color cathode ray tube

Details Color cathode ray tube Color cathode ray tube

1995-07-10

1998-04-14

Patel, Ashok

Electric lamp and discharge devices

Cathode ray tube

Plural beam generating or control

313412, 313432, 313439, 31536815, 315382, H01J 2951

Patent

active

057396302

ABSTRACT:
A color cathode ray tube which has its resolution improved all over its screen covering the central portion and the peripheral portion, either by elongating or narrowing the plate length of plate electrodes 243, which are formed between a first kind of focusing electrode 241 and a second kind of focusing electrode 242 constituting together the electrostatic quadrupole lens of a halved focusing electrode 24 and which are connected with the second kind of focusing electrode 242, at the vertical portion 2430 of a passage for a central electron beam, or by making the shape of the central electron beam passing hole of an electrode 245 formed with the electron beam passing holes of the first kind focusing electrode 241, longer than the shape of the electron beam passing holes for the side electron beams.

REFERENCES:
patent: 4581560 (1986-04-01), Shirai et al.
patent: 4886999 (1989-12-01), Yamane et al.
patent: 5015910 (1991-05-01), Takahashi et al.
patent: 5061881 (1991-10-01), Suzuki et al.
patent: 5162695 (1992-11-01), Shimoma et al.
patent: 5300855 (1994-04-01), Kweon
patent: 5382872 (1995-01-01), Kim et al.
patent: 5394053 (1995-02-01), Yun
patent: 5506468 (1996-04-01), Koh

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