JPS57208035A - High voltage treatment of cathode-ray tube - Google Patents

High voltage treatment of cathode-ray tube

Info

Publication number
JPS57208035A
JPS57208035A JP9302481A JP9302481A JPS57208035A JP S57208035 A JPS57208035 A JP S57208035A JP 9302481 A JP9302481 A JP 9302481A JP 9302481 A JP9302481 A JP 9302481A JP S57208035 A JPS57208035 A JP S57208035A
Authority
JP
Japan
Prior art keywords
voltage
electrodes
tube
treatment
voltage treatment
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
JP9302481A
Other languages
Japanese (ja)
Inventor
Michio Nakamura
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP9302481A priority Critical patent/JPS57208035A/en
Publication of JPS57208035A publication Critical patent/JPS57208035A/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
    • H01J9/44—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"

Abstract

PURPOSE:To enable a high-quality cathode-ray tube with an excellent voltage- resisting characteristic to be obtained by subjecting the tube to high-voltage treatment by performing high-voltage ageing of the electrodes of an electron gun, without causing any spark or glass separation of the inner wall of the neck of the tube. CONSTITUTION:A part of a focusing electrode group, a high-voltage-applied electrode group, which corresonds to a main electron lens part is subjected to high-voltage treatment by, for example, developing compulsory discharge between the focusing electrodes by applying a high voltages with rectified half- waves across them, while heating the electrodes by irradiating at least one kind of beam chosen from among an ultraviolet beam, an infrared beam and a laser beam on part adjacent to the above main electron lens part. A high-voltage generator used in carrying out such high-voltage treatment as above is principally constituted of a step-up coil 10, a rectifier 11, a capacitor 12 used for adjusting the time constant of the wavy form of the discharge, a resistor 13, and an air pole gap 14 used for determining the peak value of the applied high voltage.
JP9302481A 1981-06-18 1981-06-18 High voltage treatment of cathode-ray tube Pending JPS57208035A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9302481A JPS57208035A (en) 1981-06-18 1981-06-18 High voltage treatment of cathode-ray tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9302481A JPS57208035A (en) 1981-06-18 1981-06-18 High voltage treatment of cathode-ray tube

Publications (1)

Publication Number Publication Date
JPS57208035A true JPS57208035A (en) 1982-12-21

Family

ID=14070911

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9302481A Pending JPS57208035A (en) 1981-06-18 1981-06-18 High voltage treatment of cathode-ray tube

Country Status (1)

Country Link
JP (1) JPS57208035A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01195631A (en) * 1988-01-29 1989-08-07 Toshiba Corp Manufacture of color cathode-ray tube
FR2663504A1 (en) * 1990-06-22 1991-12-27 Hitachi Ltd Method of manufacturing a cathode-ray tube
EP0634771A1 (en) * 1993-07-12 1995-01-18 Kabushiki Kaisha Toshiba Method for spot-knocking an electron gun assembly of a cathode ray tube

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01195631A (en) * 1988-01-29 1989-08-07 Toshiba Corp Manufacture of color cathode-ray tube
FR2663504A1 (en) * 1990-06-22 1991-12-27 Hitachi Ltd Method of manufacturing a cathode-ray tube
EP0634771A1 (en) * 1993-07-12 1995-01-18 Kabushiki Kaisha Toshiba Method for spot-knocking an electron gun assembly of a cathode ray tube

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