Electric lamp and discharge devices – Cathode ray tube – Plural beam generating or control
Patent
1993-06-24
1996-04-09
O'Shea, Sandra L.
Electric lamp and discharge devices
Cathode ray tube
Plural beam generating or control
313412, H01J 2962
Patent
active
055064680
ABSTRACT:
An electron gun for a color cathode-ray tube for providing a passage for a plurality of electron beams, each beam representing a color component for forming a color image. The electron gun of the present invention includes a pair of electrodes substantially symmetrical to one another with respect to the horizontal direction and coaxial with the tube in the axial direction. Each electrode has a common opening. Each common opening faces the other and is spaced from the other at a given distance in the axial direction. According to an embodiment of the present invention, each electrode includes first and second electrode member. The first electrode member inside the electrode is spaced at a given distance from the common opening of the electrode in the axial direction. The first electrode member includes a plurality of openings in cascade in the horizontal direction, and these openings partially overlap one another and communicate to one another collectively to form a singly aperture. Each opening corresponds to a respective one of the plurality of electron beams. The second electrode member inside the electrode is spaced from the first electrode member at a given distance in the axial direction and further away from the common opening of the electrode than the first electrode member.
REFERENCES:
patent: 4275332 (1981-06-01), Ashizaki et al.
patent: 4400649 (1983-08-01), Chen
patent: 4517488 (1985-05-01), Say
patent: 4583024 (1986-04-01), Chin
patent: 4599534 (1986-07-01), Shirai et al.
patent: 4626738 (1986-12-01), Gerlach
Goldstar Co. Ltd.
O'Shea Sandra L.
Patel Vip
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