Shadow mask for enhanced resolution and brightness in color cath

Details Shadow mask for enhanced resolution and brightness in color cath Shadow mask for enhanced resolution and brightness in color cath

1985-11-13

1987-11-17

Moore, David K.

Electric lamp and discharge devices

Cathode ray tube

Shadow mask, support or shield

313153, H01J 2907

Patent

active

047076330

ABSTRACT:
In construction of a shadow mask for color picture tubes, use of Invar for the shadow mask suppresses thermal deformation caused by electron beam impingement and provision of a four pole magnet frame surrounding each mask aperture causes increased convergence of electron beams, thereby enabling production of images with high resolution and brightness.

REFERENCES:
patent: 4513272 (1985-04-01), Verweel et al.
Steel Material Handbook, 1967, pp. 828-831 (Japanese edition).
Metals Handbook-8th ed.; vol. 1, "Properties & Selection of Metals", Novelty, Ohio: American Society for Metals, p. 816.
Metals Handbook, 9th ed., vol. 3, "Properties & Selection: Stainless Steels, Tool Materials and Special Purpose Material"s, Metals Park, Ohio: American Society for Metals, p. 792.

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