Title:
INDIRECTLY HEATED CATHODE AND CATHODE RAY TUBE HAVING SAME
Document Type and Number:
WIPO Patent Application WO/2004/081962
Kind Code:
A1
Abstract:
An indirectly heated cathode comprising a cathode sleeve (2) housing a heater (1), a cap-like base (3) arranged on the cathode sleeve (2), and an electron-emitting material layer (4) formed on the surface of the base (3) is disclosed. The cathode sleeve (2) is composed of a metal material which mainly contains nickel and chromium and further contains at least silicon, aluminum, selenium and lanthanum. Consequently, there can be obtained a highly reliable indirectly heated cathode which enables to prevent thermal deformation of the cathode sleeve (2), thereby suppressing fluctuation of cut-off voltage.
Inventors:
YAMAGISHI MIKA
Application Number:
PCT/JP2004/003388
Publication Date:
September 23, 2004
Filing Date:
March 15, 2004
Export Citation:
Assignee:
MATSUSHITA ELECTRIC IND CO LTD (JP)
YAMAGISHI MIKA
YAMAGISHI MIKA
International Classes:
H01J1/14; H01J1/20; H01J29/04; (IPC1-7): H01J1/14; H01J1/20; H01J29/04
Foreign References:
| JPH09102266A | 1997-04-15 | |||
| JPS5825034A | 1983-02-15 | |||
| JPH11273618A | 1999-10-08 |
Other References:
See also references of EP 1612827A4
Attorney, Agent or Firm:
Nakajima, Shiro (2-1 Toyosaki 3-chome, Kita-k, Osaka-shi Osaka 72, JP)
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