JPS5635343A - System for removing foreign object from cathode-ray tube - Google Patents

System for removing foreign object from cathode-ray tube

Info

Publication number
JPS5635343A
JPS5635343A JP11140379A JP11140379A JPS5635343A JP S5635343 A JPS5635343 A JP S5635343A JP 11140379 A JP11140379 A JP 11140379A JP 11140379 A JP11140379 A JP 11140379A JP S5635343 A JPS5635343 A JP S5635343A
Authority
JP
Japan
Prior art keywords
foreign object
deflection
cathode
ray tube
shadow mask
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
JP11140379A
Other languages
Japanese (ja)
Inventor
Akihiko Matsuo
Teruaki Sato
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP11140379A priority Critical patent/JPS5635343A/en
Publication of JPS5635343A publication Critical patent/JPS5635343A/en
Pending 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
    • H01J9/50—Repairing or regenerating used or defective discharge tubes or lamps
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/82—Recycling of waste of electrical or electronic equipment [WEEE]

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 reduce deficiency in a cathode-ray tube and to improve its quality and performance, by detecting a foreign object attached to the shadow mask of the tube while scanning said mask with electron beams, and then concentrating the irradiation of electron beams at the position where the foreign object is attached so as to remove it. CONSTITUTION:A television set circuit 9 including a power source and a deflection control circuit is energized in such a way that a deflection current is applied through each of deflection coils 5, 6, and while thus an electron beam produced in a high voltage generating circuit 7 scans a shadow mask 14 of a cathode-ray tube 12 vertically and horizontally. Where there is a foreign object 15 in a hole of the shadow mask 14, a black spot appears on the face of the tube 12. Removal of the foreign object 15 is carried out by causing the deflection current to be changed by a direct current from a D.C. power source 3 by means of a switching means 4 thereby to control the deflection current through circuits 1, 2 adapted to adjust deflection positions in the vertical and horizontal directions, and then irradiating an electron beam onto the foreign object 15.
JP11140379A 1979-08-31 1979-08-31 System for removing foreign object from cathode-ray tube Pending JPS5635343A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11140379A JPS5635343A (en) 1979-08-31 1979-08-31 System for removing foreign object from cathode-ray tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11140379A JPS5635343A (en) 1979-08-31 1979-08-31 System for removing foreign object from cathode-ray tube

Publications (1)

Publication Number Publication Date
JPS5635343A true JPS5635343A (en) 1981-04-08

Family

ID=14560260

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11140379A Pending JPS5635343A (en) 1979-08-31 1979-08-31 System for removing foreign object from cathode-ray tube

Country Status (1)

Country Link
JP (1) JPS5635343A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5061918A (en) * 1973-09-29 1975-05-27
JPH0373736A (en) * 1989-08-09 1991-03-28 Fujitsu Ltd Drive-out of recording medium
US5403989A (en) * 1992-03-25 1995-04-04 Mitsubishi Denki Kabushiki Kaisha Method and apparatus for removing foreign matters from a cathode-ray tube

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5061918A (en) * 1973-09-29 1975-05-27
JPH0373736A (en) * 1989-08-09 1991-03-28 Fujitsu Ltd Drive-out of recording medium
US5403989A (en) * 1992-03-25 1995-04-04 Mitsubishi Denki Kabushiki Kaisha Method and apparatus for removing foreign matters from a cathode-ray tube
CN1047465C (en) * 1992-03-25 1999-12-15 三菱电机株式会社 Method and apparatus for removing of objects contained in cathoderay tube

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