JPS5736750A - Electron gun - Google Patents

Electron gun

Info

Publication number
JPS5736750A
JPS5736750A JP11067280A JP11067280A JPS5736750A JP S5736750 A JPS5736750 A JP S5736750A JP 11067280 A JP11067280 A JP 11067280A JP 11067280 A JP11067280 A JP 11067280A JP S5736750 A JPS5736750 A JP S5736750A
Authority
JP
Japan
Prior art keywords
cathode
coil
electron gun
heater wire
power consumption
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP11067280A
Other languages
Japanese (ja)
Inventor
Akio Ogoshi
Shoichi Muramoto
Kiichi Ueno
Tsuneo Muchi
Kazumasa Nomura
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sony Corp
Original Assignee
Sony Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sony Corp filed Critical Sony Corp
Priority to JP11067280A priority Critical patent/JPS5736750A/en
Publication of JPS5736750A publication Critical patent/JPS5736750A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J1/00—Details of electrodes, of magnetic control means, of screens, or of the mounting or spacing thereof, common to two or more basic types of discharge tubes or lamps
    • H01J1/02—Main electrodes
    • H01J1/13—Solid thermionic cathodes
    • H01J1/15—Cathodes heated directly by an electric current

Abstract

PURPOSE:To produce an electron gun for a cathode ray tube having a super-low power consumption, by employing a cylindrical cathode where a thermion emitting material is spread over a heater wire wound tightly into a coil. CONSTITUTION:A cylindrical cathode 24 where a thermion emitting material 23 is spread over a heater wire 22 wound tightly into a coil. For example, a metal oxide 23 such as (Ba, Ca, Sr)O3 is spread through electrodeposition or blasting onto the coil-shaped section 22 of a tungsten heater 21 to form a direct-heated cathode 24. Then both ends of the heater wire 21 are secured through pressing, caulking, welding, etc. onto a pair of lead wires 26a, 26b planted on a ceramic insulative supporter 25 to construct a cathode structure 27 which is arranged in the first grid G1 as shown on the drawing to assemble an electron gun. Consequently the thermal capacity of the cathode 24 is reduced while only the required sectiol is locally heated thereby the power consumption of the cathode can be reduced to approximately 1/4 of the conventional one, for example.
JP11067280A 1980-08-12 1980-08-12 Electron gun Pending JPS5736750A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11067280A JPS5736750A (en) 1980-08-12 1980-08-12 Electron gun

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11067280A JPS5736750A (en) 1980-08-12 1980-08-12 Electron gun

Related Child Applications (1)

Application Number Title Priority Date Filing Date
JP23162388A Division JPH01117244A (en) 1988-09-16 1988-09-16 Cathode-ray tube device

Publications (1)

Publication Number Publication Date
JPS5736750A true JPS5736750A (en) 1982-02-27

Family

ID=14541527

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11067280A Pending JPS5736750A (en) 1980-08-12 1980-08-12 Electron gun

Country Status (1)

Country Link
JP (1) JPS5736750A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5928376A (en) * 1982-08-09 1984-02-15 Hitachi Ltd Semiconductor device and manufacture thereof
JPS60107234A (en) * 1983-11-15 1985-06-12 Sony Corp Method of manufacturing directly heated cathode structure
US5057736A (en) * 1989-04-07 1991-10-15 Nec Corporation Directly-heated cathode structure
JPH0521241Y2 (en) * 1987-11-13 1993-05-31

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5537717A (en) * 1978-09-08 1980-03-15 Hitachi Ltd Direct heating cathode construction and its manufacturing method

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5537717A (en) * 1978-09-08 1980-03-15 Hitachi Ltd Direct heating cathode construction and its manufacturing method

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5928376A (en) * 1982-08-09 1984-02-15 Hitachi Ltd Semiconductor device and manufacture thereof
JPS60107234A (en) * 1983-11-15 1985-06-12 Sony Corp Method of manufacturing directly heated cathode structure
JPH0521296B2 (en) * 1983-11-15 1993-03-24 Sony Corp
JPH0521241Y2 (en) * 1987-11-13 1993-05-31
US5057736A (en) * 1989-04-07 1991-10-15 Nec Corporation Directly-heated cathode structure

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