Electric lamp and discharge devices – Cathode ray tube – Envelope
Patent
1998-04-16
2000-05-09
Patel, Ashok
Electric lamp and discharge devices
Cathode ray tube
Envelope
313402, 174 36, 174 35MS, H01J 3100
Patent
active
060608250
ABSTRACT:
Method for fabricating an inner shield for use in a color cathode ray tube, is disclosed, for preventing degradation of a color finesse of the color cathode ray tube, the method including the steps of drawing or forming a piece of thin sheet of aluminum killed steel to form an inner shield of required form, annealing the inner shield in a reducing atmosphere at a temperature above a recrystallization temperature of the aluminum killed steel for improving a non-uniform magnetic distribution thereof, and coating black ironoxide film on a surface of the annealed inner shield.
REFERENCES:
patent: 5434470 (1995-07-01), De Wit et al.
patent: 5557161 (1996-09-01), Van Mensvoort
patent: 5880555 (1999-03-01), Park
LG Electronics Inc.
Patel Ashok
White John P.
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