Panel assembly for cathode ray tube with vibration damping membe

Details Panel assembly for cathode ray tube with vibration damping membe Panel assembly for cathode ray tube with vibration damping membe

1998-12-01

2000-08-08

Day, Michael H.

Electric lamp and discharge devices

Cathode ray tube

Shadow mask, support or shield

313402, 313405, 313406, H01J 2980

Patent

active

061006297

ABSTRACT:
A panel assembly for a cathode ray tube includes a panel having an inner phosphor screen and a side-wall, and a shadow mask having a plurality of beam-guide apertures. The shadow mask is placed behind the phosphor screen at a predetermined distance. A shadow mask frame is attached under the shadow mask to suspend it in the panel. The panel assembly further includes a plurality of stud pins embedded into the side-wall of the panel, a spring positioned between the shadow mask frame and the stud pins to interconnect them, and a vibration damping member for damping vibration of the shadow mask by converting mechanical stress applied to the shadow mask into electrical energy. The vibration damping member is formed with piezoelectric material layers provided on at least one of an outer periphery of the stud pin and between the spring and mask frame.

REFERENCES:
patent: 4857795 (1989-08-01), Wakita et al.
patent: 5103132 (1992-04-01), Van Der Bolt et al.
patent: 5289080 (1994-02-01), Park
patent: 5451833 (1995-09-01), Tong

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