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JPS55154033A - Manufacture of cathode-ray tube - Google Patents

Manufacture of cathode-ray tube

Info

Publication number
JPS55154033A
JPS55154033A JP6040979A JP6040979A JPS55154033A JP S55154033 A JPS55154033 A JP S55154033A JP 6040979 A JP6040979 A JP 6040979A JP 6040979 A JP6040979 A JP 6040979A JP S55154033 A JPS55154033 A JP S55154033A
Authority
JP
Japan
Prior art keywords
electrode
cathode
ray tube
high frequency
degree
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.)
Granted
Application number
JP6040979A
Other languages
Japanese (ja)
Other versions
JPS645739B2 (en
Inventor
Masayoshi Misono
Kazuhiro Yamagishi
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.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP6040979A priority Critical patent/JPS55154033A/en
Publication of JPS55154033A publication Critical patent/JPS55154033A/en
Publication of JPS645739B2 publication Critical patent/JPS645739B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
    • H01J9/44—Factory adjustment of completed discharge tubes or lamps to comply with desired tolerances
    • H01J9/445—Aging of tubes or lamps, e.g. by "spot knocking"

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)

Abstract

PURPOSE:To improve the withstand voltage characteristics in a cathode-ray tube by performing a spot knocking processing while heating the electrode which constitutes an electron gun. CONSTITUTION:The magnetic flux when current is supplied to an electrode baking coil 40 for applying an high frequency current generates eddy current in a G5 electrode 25 and heats the place near a G6 electrode 26 of the electrode 25. By adjusting the position, shape, and high frequency current value of the electrode baking coil 40, the local degree of vacuum deterioration is generated and the required selective knocking processing can be performed. Further, actual color picture tubes use evaporation type getters to maintain the degree of intra-tube vaccum.
JP6040979A 1979-05-18 1979-05-18 Manufacture of cathode-ray tube Granted JPS55154033A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6040979A JPS55154033A (en) 1979-05-18 1979-05-18 Manufacture of cathode-ray tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6040979A JPS55154033A (en) 1979-05-18 1979-05-18 Manufacture of cathode-ray tube

Publications (2)

Publication Number Publication Date
JPS55154033A true JPS55154033A (en) 1980-12-01
JPS645739B2 JPS645739B2 (en) 1989-01-31

Family

ID=13141343

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6040979A Granted JPS55154033A (en) 1979-05-18 1979-05-18 Manufacture of cathode-ray tube

Country Status (1)

Country Link
JP (1) JPS55154033A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58206028A (en) * 1982-05-26 1983-12-01 Hitachi Ltd Manufacturing method of cathode-ray tube

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5438755A (en) * 1977-09-01 1979-03-23 Mitsubishi Electric Corp Spot knocking method for cathode-ray tube

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5438755A (en) * 1977-09-01 1979-03-23 Mitsubishi Electric Corp Spot knocking method for cathode-ray tube

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58206028A (en) * 1982-05-26 1983-12-01 Hitachi Ltd Manufacturing method of cathode-ray tube
JPH0373089B2 (en) * 1982-05-26 1991-11-20 Hitachi Ltd

Also Published As

Publication number Publication date
JPS645739B2 (en) 1989-01-31

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