Color picture tube with support members for the mask frame

Details Color picture tube with support members for the mask frame Color picture tube with support members for the mask frame

1987-11-16

1989-05-02

Boudreau, Leo H.

Electric lamp and discharge devices

Cathode ray tube

Shadow mask, support or shield

313406, 313407, H01J 2907

Patent

active

048271802

ABSTRACT:
A color picture tube having a shadow mask structure with a shadow mask and a mask frame supporting the shadow mask facing a phosphor screen inside a panel comprises a plurality of V-shaped support members, each having a folded portion apart from a sidewall of the mask frame and two arm portions extending from the folded portion.
The support members support the shadow mask structure to the panel to control a relative distance beween the phosphor screen and the shadow mask according to thermal expansion of the shadow mask structure or the panel, whereby positions impinged by an electron beam on the phosphor screen remained invariably.

REFERENCES:
patent: 4652792 (1987-03-01), Tokita et al.
patent: 4659958 (1987-04-01), D'Amato
patent: 4723088 (1988-02-01), Sone et al.

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