JPS5767261A - Manufacturing method for cathode-ray tube - Google Patents

Manufacturing method for cathode-ray tube

Info

Publication number
JPS5767261A
JPS5767261A JP14210280A JP14210280A JPS5767261A JP S5767261 A JPS5767261 A JP S5767261A JP 14210280 A JP14210280 A JP 14210280A JP 14210280 A JP14210280 A JP 14210280A JP S5767261 A JPS5767261 A JP S5767261A
Authority
JP
Japan
Prior art keywords
electrode
electron beam
cathode
passing hole
beam passing
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
JP14210280A
Other languages
Japanese (ja)
Other versions
JPH026186B2 (en
Inventor
Hideo Suzuki
Katsuhisa Narita
Osamu Kato
Rokuro Hasebe
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 JP14210280A priority Critical patent/JPS5767261A/en
Publication of JPS5767261A publication Critical patent/JPS5767261A/en
Publication of JPH026186B2 publication Critical patent/JPH026186B2/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

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 remove the deposited material of an electrode near an electron beam passing hole by applying specified voltage to each electrode, removing the electron beam from a cathode in defocussing status, accelerating this, and making it collide against the G2 electrode surface. CONSTITUTION:4-5kV middle and high voltages are applied to the G4 electrode 1 and the G3 electrode 2 of an electron gun frame which is sealed in the neck tube of a color cathode-ray tube and 400-500V low voltages are applied to the G2 electrode 3. Besides, the G1 electrode 4 and a cathode 5 are grounded and an approximately 9V ac power supply is connected a heater 6. An electron beam is emitted from the cathode 4 and foreign matters, such as deposited materials are removed by making its part collide against the vicinity of the electron beam passing hole of the G2 electrode 3 and the G1 electrode 4. Thus by removing the electron beam in defocussing status, the vicinity of the electron beam passing hole can be cleaned, the generation source of stray emission be eliminated, and the characteristics of withstand voltage sharply be improved.
JP14210280A 1980-10-13 1980-10-13 Manufacturing method for cathode-ray tube Granted JPS5767261A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14210280A JPS5767261A (en) 1980-10-13 1980-10-13 Manufacturing method for cathode-ray tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14210280A JPS5767261A (en) 1980-10-13 1980-10-13 Manufacturing method for cathode-ray tube

Publications (2)

Publication Number Publication Date
JPS5767261A true JPS5767261A (en) 1982-04-23
JPH026186B2 JPH026186B2 (en) 1990-02-07

Family

ID=15307470

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14210280A Granted JPS5767261A (en) 1980-10-13 1980-10-13 Manufacturing method for cathode-ray tube

Country Status (1)

Country Link
JP (1) JPS5767261A (en)

Also Published As

Publication number Publication date
JPH026186B2 (en) 1990-02-07

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