Cathode-ray tube with focussing structure and getter means

Details Cathode-ray tube with focussing structure and getter means Cathode-ray tube with focussing structure and getter means

1992-01-27

1993-04-13

Demeo, Palmer C.

Electric lamp and discharge devices

Cathode ray tube

Ray generating or control

313560, 313481, H01J 2906, H01J 2994

Patent

active

052026060

ABSTRACT:
The invention relates to a cathode-ray tube 1 having an electron gun 3 positioned in a neck portion 2. The electron gun 3 is provided with a focusing structure 10 which includes a hollow tube 12 of electrically insulating material. A layer 14 of a material having a high resistance is applied to the inner surface of the hollow tube. The resistance layer 14 is shielded from a getter arrangement 44 positioned in the cathode ray tube 1.

REFERENCES:
patent: 3432712 (1969-03-01), Benda
patent: 3979633 (1976-09-01), Davis et al.
patent: 4220893 (1980-09-01), Miller et al.
patent: 4221991 (1980-09-01), Speigel
patent: 4231627 (1980-11-01), Schaffernicht et al.
patent: 4665340 (1987-05-01), Odenthal et al.
patent: 4806821 (1989-02-01), von Gorkum
patent: 4885503 (1989-12-01), Takahashi et al.
patent: 4945283 (1990-07-01), Van Der Heijden et al.

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