JPS57208037A - Ageing of cathode-ray tube - Google Patents

Ageing of cathode-ray tube

Info

Publication number
JPS57208037A
JPS57208037A JP9495381A JP9495381A JPS57208037A JP S57208037 A JPS57208037 A JP S57208037A JP 9495381 A JP9495381 A JP 9495381A JP 9495381 A JP9495381 A JP 9495381A JP S57208037 A JPS57208037 A JP S57208037A
Authority
JP
Japan
Prior art keywords
grid
anode
cathode
ray tube
negative voltage
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
JP9495381A
Other languages
Japanese (ja)
Other versions
JPH0121579B2 (en
Inventor
Wataru Imanishi
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric 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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP9495381A priority Critical patent/JPS57208037A/en
Publication of JPS57208037A publication Critical patent/JPS57208037A/en
Publication of JPH0121579B2 publication Critical patent/JPH0121579B2/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 prevent any beam current sent form a cathode form flowing onto the extreme end of a cecond grid by applying a negative voltage of -800- -3,000V to an anode during the ageing process of a cathode-ray tube. CONSTITUTION:When a negative voltage of -800--3,000v is applied to an anode 5, and a voltage of 70V is applied to a second grid 6 during the ageing process of a catode-ray tube, the flow lines of a beam current 19 developing from a cathode 8 become as indicated in the figure. Since a highly negative voltage is applied to the anode 5, and the aperture of the grid 6 on the anode 5 side is large, an electric field developing from the anode 5 enters inside the grid 6 so as to deflect the beam current 19. As the result, the current 19 is prevented from flowing onto an ectreme end 61 of the grid 6. Consequently, any activation of an oxidized getter film adhering to the end 61 of the grid 6 is prevented, and any defective straight emission generated during the ageing process can be completely prevented.
JP9495381A 1981-06-18 1981-06-18 Ageing of cathode-ray tube Granted JPS57208037A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9495381A JPS57208037A (en) 1981-06-18 1981-06-18 Ageing of cathode-ray tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9495381A JPS57208037A (en) 1981-06-18 1981-06-18 Ageing of cathode-ray tube

Publications (2)

Publication Number Publication Date
JPS57208037A true JPS57208037A (en) 1982-12-21
JPH0121579B2 JPH0121579B2 (en) 1989-04-21

Family

ID=14124299

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9495381A Granted JPS57208037A (en) 1981-06-18 1981-06-18 Ageing of cathode-ray tube

Country Status (1)

Country Link
JP (1) JPS57208037A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2583919A1 (en) * 1985-06-21 1986-12-26 Videocolor METHOD AND APPARATUS FOR HEATING ELECTRODES OF AN ELECTRON GUN DURING ITS MANUFACTURE

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0564078A (en) * 1991-08-30 1993-03-12 Victor Co Of Japan Ltd Video signal processing circuit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2583919A1 (en) * 1985-06-21 1986-12-26 Videocolor METHOD AND APPARATUS FOR HEATING ELECTRODES OF AN ELECTRON GUN DURING ITS MANUFACTURE
US4687454A (en) * 1985-06-21 1987-08-18 Videocolor Method and device for heating the electrodes of an electron gun during its manufacture

Also Published As

Publication number Publication date
JPH0121579B2 (en) 1989-04-21

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