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US 2004/0207307 A1Published application
Cathode structure, electron gun, and cathode ray tube
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsYoji Yamamoto, Mika Yamagishi, Satoru Nakagawa
Life of this patent
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Abstract
A cathode structure comprises a heater including a columnar ceramic body and a heating wire that is partially buried in the ceramic body, and a cathode unit disposed at a first end surface of the ceramic body. The heating wire leads out from a second end surface of the ceramic body.
Claims9
A cathode structure comprising:
- a heater including a columnar electric insulating material body and a heating wire that is partially buried in the electric insulating material body;
- and
- a cathode unit disposed at a first end surface of the electric insulating material body, wherein
- the heating wire leads out from a second end surface of the electric insulating material body.
1 more element
A cathode structure comprising:
- a heater including a columnar electric insulating material body and a heating wire that is partially buried in the electric insulating material body and leads out from a side surface thereof;
- and
- a cathode unit disposed at one of end surfaces of the electric insulating material body, and emitting electrons from a surface of the cathode unit when heated by the heater, wherein
- the electric insulating material body includes a protrusion disposed on the side surface between a position from which the heating wire leads out and the surface of the cathode unit from which electrons are emitted.
1 more element
Dependencies are inferred from the claim text.