Composite shadow mask and cathode ray tube incorporating same

Details Composite shadow mask and cathode ray tube incorporating same Composite shadow mask and cathode ray tube incorporating same

1997-12-04

2000-03-28

Day, Michael H.

Electric lamp and discharge devices

Cathode ray tube

Shadow mask, support or shield

313407, 430 23, 430 5, H01J 2980, G03C 0500, G03F 0900

Patent

active

060435968

ABSTRACT:
A color CRT has a shadow mask formed from a bilayer composite of steel and invar. The thicknesses of steel and invar are chosen to take advantage of the lower thermal expansion coefficient of invar and the room temperature formability and higher modulus of elasticity of steel. Such composite masks exhibit reduced doming when compared to steel masks, and can be formed at room temperature.

REFERENCES:
patent: 5686784 (1997-11-01), Thoms et al.
patent: 5797781 (1998-08-01), Yoon
patent: 5863681 (1999-01-01), Helmetag

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