Electric lamp and discharge devices – Cathode ray tube – Plural beam generating or control
Patent
1996-06-24
1999-05-04
O'Shea, Sandra
Electric lamp and discharge devices
Cathode ray tube
Plural beam generating or control
313337, 313346R, 313446, 313270, 24 2515, 24 2513, 216 33, H01J 902, H01J 918
Patent
active
059006927
ABSTRACT:
An indirect cathode sleeve and manufacturing method thereof capable of substantially reducing electric power consumption of a heater disposed inside the cathode sleeve and simultaneously reducing a picture-producing time by oxidizing an inside surface of the cathode sleeve and reducing an outside surface thereof. The cathode sleeve includes a heater disposed inside the cathode sleeve; a base metal formed at the top of the cathode sleeve; an electron-emitting material layer formed at the outside surface of the base metal; and an indirect cathode sleeve including a black inside surface and a white outside surface. The method for manufacturing the indirect cathode sleeve includes the steps of forming a structure of a cathode sleeve consisting of a bimetal which consist of a Nickel-Chrome alloy at an inside surface of the cathode sleeve and a Nickel alloy at an outside surface of the cathode sleeve; oxidizing the inside surface of the cathode sleeve through a high temperature wet hydrogen environment; selectively etching the outside surface of the cathode sleeve and, as a result, forming a base metal at the top of the cathode sleeve; and forming an electron-emitting material layer at the outside surface of the base metal.
REFERENCES:
patent: 4170811 (1979-10-01), Turnbull
patent: 4210988 (1980-07-01), Turnbull et al.
RCA Technical Notes, "One-Piece Bimetal Cathode Cup and Sleeve", John C. Turnbull, Princeton, NJ. Jul. 23, 1976 TN No. 1159 2 pages.
Jung Gil Young
Ko Byeong Doo
Lee Kyeong Sang
Park Gong Seok
Park Hun Gun
Gerike Matthew J.
Goldstar Co. Ltd.
O'shea Sandra
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