Electric lamp and discharge devices – Cathode ray tube – Beam deflecting means
Patent
1999-04-14
2000-12-19
Patel, Ashok
Electric lamp and discharge devices
Cathode ray tube
Beam deflecting means
313440, 335213, H01J 2970
Patent
active
061631043
ABSTRACT:
The color cathode-ray tube comprises a glass bulb, a shadow mask, a deflection yoke, and an electron-beam shifting device. The glass bulb comprises a face-plate with stripe-like phosphors for a plurality of colors formed on its inner face by a printing method, a funnel portion connected to the rear part of the face-plate, and a neck portion formed at the rear of the funnel portion. Inside the neck portion, an inline electron gun is provided for emitting electron beams. The shadow mask comprises a plurality of openings disposed corresponding to the stripe direction of the phosphors for each color on the face-plate. The deflection yoke is provided on the peripheral surfaces of the funnel portion and the neck portion. The electron-beam shifting device is provided on the peripheral surface of the neck portion for shifting the deflection center of the electron beams in the inline-alignment direction of the electron beams. The phosphors are formed by the printing method, thus reducing the costs. Furthermore, the electron-beam shifting device is provided, thus ensuring accurate color reproduction.
REFERENCES:
patent: 5757121 (1998-05-01), Nakata
patent: 6016093 (2000-01-01), Grubben et al.
Matsushita Electronics Corporation
Patel Ashok
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