CRT with funnel having quadrangular yoke portion

Details CRT with funnel having quadrangular yoke portion CRT with funnel having quadrangular yoke portion

2005-04-05

2005-04-05

Patel, Ashok (Department: 2879)

Electric lamp and discharge devices

Cathode ray tube

Beam deflecting means

C313S47700R, C220S00210A, C220S00230A, C335S209000, C335S296000

Reexamination Certificate

active

06876138

ABSTRACT:
In a color cathode ray tube, by optimizing an outer radios of curvature, an inner radius of curvature on a corner portion, a thickness of a long side, a thickness of a short side, a thickness of the corner portion, the total length of the panel, the total length of the funnel body and the total length of a yoke portion of the funnel determining a section shape of the yoke portion of the funnel, a stress concentrated on the yoke portion can be lowered. In addition, according to the increase of an inner radius of curvature of the corner portion of the yoke portion, a crash phenomenon of an electron beam is decreased, and an impact resistance and productivity improvement in fabrication process can be secured by lowering a high stress occurrence on the funnel in vacuum.

REFERENCES:
patent: 3610990 (1971-10-01), Yamazaki et al.
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patent: 4858016 (1989-08-01), Suehiro et al.
patent: 5962964 (1999-10-01), Sano et al.
patent: 6160343 (2000-12-01), Joung
patent: 6259206 (2001-07-01), Tsuchiya et al.
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patent: 6384525 (2002-05-01), Sano et al.
patent: 6534908 (2003-03-01), Nose et al.
patent: 6541902 (2003-04-01), Carpinelli et al.
patent: 6552483 (2003-04-01), Cho et al.
patent: 6590329 (2003-07-01), Tagami

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