Color picture tube

Details Color picture tube Color picture tube

1986-08-07

1988-03-22

Moore, David K.

Electric lamp and discharge devices

Cathode ray tube

Shadow mask, support or shield

313481, H01J 2907, H01J 2994

Patent

active

047331259

ABSTRACT:
A color picture tube has: an envelope; a phosphor screen formed on the inner surface of the envelope; a shadow mask which is disposed in the envelope and in a vicinity of the phosphor screen and which has a main surface portion with a number of apertures; and an electron gun for emitting electron beams which are selectively transmitted through the apertures and are bombarded on the phosphor screen so as to emit multi-color light. A layer having a ceramic material as a major constituent is chemically bonded to that surface of the main surface portion of the shadow mask which is located at the side of the electron gun, and a conductive layer is formed on the layer. The charge-up phenomenon of the layer having a ceramic material is prevented by the conductive layer.

REFERENCES:
patent: 3792300 (1974-02-01), Benda et al.
patent: 3887828 (1975-06-01), Bathelt et al.
patent: 4392914 (1983-07-01), Takenaka et al.
patent: 4458174 (1984-07-01), De Keijzer

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