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US 4,900,984 AGranted
Cathode ray tube with antistatic film on front panel
AssigneesKabushiki Kaisha Toshiba, Tama Chemicals Co., Ltd.
InventorsTakeo Itou, Hidemi Matsuda, Mamory Yoshizako, Osamu Yagi
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Abstract
A cathode ray tube according to the present invention has a sufficient antistatic property which can be obtained by forming a glass film containing SiO.sub.2 or P.sub.2 O.sub.5 as a main component and a hygroscopic metal salt on the outer surface of its front panel.
Claims5
A cathode ray tube comprising:
- an envelope having a front panel;
- and
- a glass film formed on said front panel and containing SiO.sub.2 or P.sub.2 O.sub.5 as a main component and a hygroscopic metal salt sealed in the interstices of the skeleton structure of said glass film.
A glass solution for an antistatic film of a cathode ray tube comprising:
- a polysiloxane or alcoholate of Si;
- and
- a hygroscopic metal salt in an amount of 0.01 to 100% by weight with respect to SiO.sub.2 stoichiometrically produced from said polysiloxane or alcoholate of Si.
A cathode ray tube comprising:
- an envelope having a front panel;
- and
- a glass film formed on said front panel and containing SiO.sub.2 or P.sub.2 O.sub.5 as a main component and a hygroscopic metal salt of a metallic element having an atomic number of 31 or less sealed in the interstices of the skeleton structure of said glass film.
Dependencies are inferred from the claim text.