Color cathode-ray tube

Details Color cathode-ray tube Color cathode-ray tube

1995-06-07

1997-03-11

O'Shea, Sandra L.

Electric lamp and discharge devices

Cathode ray tube

Shadow mask, support or shield

313403, 313404, 313406, 313407, H01J 2980

Patent

active

056104731

ABSTRACT:
A color cathode-ray tube comprises a mask unit arranged between a face panel and an electron gun. The mask unit comprises a shadow mask and a mask frame supporting the shadow mask with being applied with tension. The shadow mask is formed of a substantially rectangular thin plate, arranged to face a phosphor screen formed on an inner surface of the face panel, and has a number of electron beam apertures through which electron beams emitted from the electron gun pass. The mask frame comprises a substantially rectangular frame body which has a pair of first sidewalls facing each other and a pair of second sidewalls facing each other, and a pair of mask fixing sections secured to a pair of opposite side edge portions of the shadow mask and extending along the side edge portions. The pair of mask fixing sections extend substantially in parallel with the first sidewalls, respectively and have connecting sections each of which connects a middle portion of the mask fixing section to a middle portion of the corresponding first sidewall.

REFERENCES:
patent: 3601650 (1971-08-01), Pappadis

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