Color picture tube

Details Color picture tube Color picture tube

2006-12-12

2006-12-12

Patel, Nimeshkumar D. (Department: 2879)

Electric lamp and discharge devices

Cathode ray tube

Envelope

C313S461000, C220S00210A, C220S00210R

Reexamination Certificate

active

07148616

ABSTRACT:
A curve formed by an inner surface of a face panel in a cross-section including a tube axis of a color picture tube is defined. The face panel includes at least one cross-section in which the curve has an inflection point between a center of the face panel and a circumferential edge of an effective display region. Assuming that a maximum value of an angle formed by a tangent of the curve and a plane orthogonal to the tube axis between the center of the face panel and the inflection point is θA, and a minimum value of an angle formed by the tangent of the curve and the plane orthogonal to the tube axis between the inflection point and the circumferential edge of the effective display region is θB, the curve having the inflection point satisfies 0.6≦θB/θA<1.0. Because of this, a color picture tube having satisfactory screen quality can be provided.

REFERENCES:
patent: 4786840 (1988-11-01), Ragland, Jr.
patent: 5276377 (1994-01-01), Van Nes et al.
patent: 5606217 (1997-02-01), Hirai et al.
patent: 6157124 (2000-12-01), Wakasono
patent: 6448706 (2002-09-01), Kawamura et al.
patent: 6639347 (2003-10-01), Ko
patent: 2003/0164669 (2003-09-01), Kim et al.
patent: 0 438 197 (1991-07-01), None
patent: 0 899 769 (1999-03-01), None
patent: 55-28269 (1980-02-01), None
patent: 2004-14433 (2004-01-01), None

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