Electric lamp and discharge devices – Cathode ray tube – Shadow mask – support or shield
Patent
1994-05-16
1996-07-02
O'Shea, Sandra L.
Electric lamp and discharge devices
Cathode ray tube
Shadow mask, support or shield
313402, 313404, 313405, H01J 2980
Patent
active
055325459
ABSTRACT:
In the bulb of a color cathode ray tube, a flat glass panel having a substantially uniform thickness is used. The flat glass panel has a glass wall which extends in a substantially vertical direction from the flat glass panel. The glass wall adheres to a funnel, which includes a neck portion in which an electron gun is disposed, by means of a glass adhesive so as to form the bulb. A shadow mask on which a number of apertures are formed is fixed to a frame with an appropriate tensile stress and the frame is mounted on the glass wall. The shadow mask is disposed at a position close to the phosphor screen formed on the inner surface of the flat glass panel, facing thereto. On the outer surface of the flat glass panel, a resin film comprising at least one layer is attached by means of an adhesive. The resin film has appropriate mechanical, optical and electrical properties with which the flat glass panel should have. Thus, various properties of the flat glass panel can be controlled. As a result, it makes it possible to provide a high performance color cathode ray tube using a thin flat glass panel which has a sufficiently large mechanical strength and desirable optical characteristics, capable of displaying images with high resolution and high color tone without distortion over the entire front surface.
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European Search Report dated Jul. 28, 1995.
European Search Report dated Aug. 29, 1994 for corresponding European patent application No. EP 94 10 7622.
Konosu Osamu
Maki Hideaki
Okamoto Takami
Matsushita Electronics Corporation
Ning John
O'Shea Sandra L.
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