Color cathode ray tube

Details Color cathode ray tube Color cathode ray tube

1998-03-30

1999-11-09

Day, Michael

Electric lamp and discharge devices

Cathode ray tube

Shadow mask, support or shield

313404, 313407, H01J 2982, H01J 2907

Patent

active

059820845

ABSTRACT:
A color cathode ray tube is provided which comprises a face panel having an inner surface on which phosphors are formed, a funnel connected to the rear portion of the face panel, an electron gun housed in the neck portion of the funnel, a frame attached to pins on the inside of the face panel through springs provided on two short sides of the frame and one long side thereof, and a shadow mask attached to the frame at a predetermined distance from the phosphor surface. The operation length of the spring on the short side is longer than that of the spring on the long side, so that the amount of upward displacement of landing points during the entire doming phenomenon is decreased. Thus, the deterioration in the uniformity of the luminance of white quality is reduced in the color cathode ray tube.

REFERENCES:
patent: 3343024 (1967-09-01), Torrence
patent: 3492522 (1970-01-01), Pappadis
patent: 3671794 (1972-06-01), Nakamura et al.
patent: 4012661 (1977-03-01), Danielson, Jr. et al.
patent: 4367430 (1983-01-01), Matsushita et al.

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