Title:
CATHODE RAY TUBE GLASS PANEL
Document Type and Number:
WIPO Patent Application WO/2000/041204
Kind Code:
A1
Abstract:
A cathode ray tube glass panel having an effective picture plane diameter D of at least 500 mm in the diagonal axis direction of a glass panel and an average radius of curvature of at least 10000 mm at the outer surface of a face portion (11), wherein, when a tube-axis-direction distance h from a contact point between an effective picture plane end of a glass panel inner surface and a blend R portion (12) to a sealed end face (14) is set as a length of a skirt portion (13) and a glass wall thickness at the sealed end face (14) of the skirt portion is set to be t, these h and t are range-specified at a ratio with respect to the effective picture plane diameter D and a product of h and t is range-specified in relation to the effective picture plane diameter D, whereby deformation due to tilting of the skirt portion is suppressed, a mechanical strength reduced by a shorter skirt portion is compensated for by the glass wall thickness at the sealed end face and the glass panel is reduced in weight without compromising a specified mechanical strength.
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Inventors:
KYONO MASAYA (JP)
Application Number:
PCT/JP1999/007185
Publication Date:
July 13, 2000
Filing Date:
December 21, 1999
Export Citation:
Assignee:
NIPPON ELECTRIC GLASS CO (JP)
KYONO MASAYA (JP)
KYONO MASAYA (JP)
International Classes:
H01J29/86; (IPC1-7): H01J29/86
Foreign References:
| GB2322731A | 1998-09-02 | |||
| GB2321899A | 1998-08-12 | |||
| GB2318905A | 1998-05-06 | |||
| JPS534856U | 1978-01-17 |
Attorney, Agent or Firm:
Suzuki, Yasuo (Shinbasi 6-chome Minato-ku Tokyo, JP)
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