JPS57130344A - Production of cathode ray tube - Google Patents

Production of cathode ray tube

Info

Publication number
JPS57130344A
JPS57130344A JP1432281A JP1432281A JPS57130344A JP S57130344 A JPS57130344 A JP S57130344A JP 1432281 A JP1432281 A JP 1432281A JP 1432281 A JP1432281 A JP 1432281A JP S57130344 A JPS57130344 A JP S57130344A
Authority
JP
Japan
Prior art keywords
grid
electron current
practical use
diffusion
ray tube
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
JP1432281A
Other languages
Japanese (ja)
Other versions
JPH0421296B2 (en
Inventor
Rokuro Hasebe
Yoshinori Oyamada
Osamu Kato
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 JP1432281A priority Critical patent/JPS57130344A/en
Publication of JPS57130344A publication Critical patent/JPS57130344A/en
Publication of JPH0421296B2 publication Critical patent/JPH0421296B2/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"

Abstract

PURPOSE:To prevent a particular spot of a shadow mask or a fluorescent surface from being damaged by a method wherein, when a soiled spot on the second grid surface is cleaned by discharging a diffusion electron current, the diffusion electron current is deflected using a deflection yoke. CONSTITUTION:Voltage at about 400V which is higher than that for practical use is applied to the second grid of a cathode ray tube treated with aging and voltage at about 5KV which is lower than that for practical use to electrodes of the third grid onward in order to produce a diffusion electron current for cleaning the soiled surface of the second grid. At this time, a deflection yoke is allowed to operate as in the case of practical use so that each electron constituting the diffusion electron current. In so doing, particular spots on the surface of a shadow mask or a fluorescent surface are made immune from continuous electronic shocks, so that the predetermined spots are prevented from being damaged.
JP1432281A 1981-02-04 1981-02-04 Production of cathode ray tube Granted JPS57130344A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1432281A JPS57130344A (en) 1981-02-04 1981-02-04 Production of cathode ray tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1432281A JPS57130344A (en) 1981-02-04 1981-02-04 Production of cathode ray tube

Publications (2)

Publication Number Publication Date
JPS57130344A true JPS57130344A (en) 1982-08-12
JPH0421296B2 JPH0421296B2 (en) 1992-04-09

Family

ID=11857837

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1432281A Granted JPS57130344A (en) 1981-02-04 1981-02-04 Production of cathode ray tube

Country Status (1)

Country Link
JP (1) JPS57130344A (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5118309A (en) * 1974-06-24 1976-02-13 Siemens Ag Atsushukukio zenchisetsuzokushita ekitairingushinkuhonpu
JPS5199467A (en) * 1975-02-28 1976-09-02 Tokyo Shibaura Electric Co KARAAJUZOKANEEJINGUSOCHI
JPS6322010A (en) * 1986-04-04 1988-01-29 ザ、プロクタ−、エンド、ギヤンブル、カンパニ− Hair treatment composition

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5118309A (en) * 1974-06-24 1976-02-13 Siemens Ag Atsushukukio zenchisetsuzokushita ekitairingushinkuhonpu
JPS5199467A (en) * 1975-02-28 1976-09-02 Tokyo Shibaura Electric Co KARAAJUZOKANEEJINGUSOCHI
JPS6322010A (en) * 1986-04-04 1988-01-29 ザ、プロクタ−、エンド、ギヤンブル、カンパニ− Hair treatment composition

Also Published As

Publication number Publication date
JPH0421296B2 (en) 1992-04-09

Similar Documents

Publication Publication Date Title
GB2140968B (en) Cathode-ray tube having an improved screen grid electrode of an inline electron gun
CA1136693A (en) Method for spot-knocking the electron-gun mount assembly of a crt
US3268753A (en) Plural electron gun assembly and magnetic convergence cage
GB859873A (en) Improvements in or relating to colour television tubes
JPS57130344A (en) Production of cathode ray tube
EP0349251B1 (en) Method for spot-knocking an electron gun mount assembly of a CRT
US4682962A (en) Method of manufacturing a cathode ray tube
GB806510A (en) Improvements in or relating to colour-television cathode-ray tubes
US4883437A (en) Method for spot-knocking an electron gun mount assembly of a crt utilizing a magnetic field
JP3376080B2 (en) Withstand voltage treatment method for cathode ray tube
JPS553105A (en) Electron gun
JPS5697948A (en) Electron gun electrode frame for cathode-ray tube
JPS56168323A (en) Aging method for cathode-ray tube
JPS5767261A (en) Manufacturing method for cathode-ray tube
JPS569938A (en) Dust remover for cathode-ray tube
JPS57163952A (en) Electron gun for braun tube
GB893914A (en) Improvements in electron-beam stepping tubes and circuits therefor
JPS5583134A (en) Electron gun for cathode ray tube
DE3663425D1 (en) Method for heating electron gun electrodes during manufacture
JPS57199148A (en) Cathode-ray tube
JPH01169840A (en) Cathode-ray tube processing method for improvement of withstand voltage characteristic
JPS5780635A (en) High voltage processing method for cathode-ray tube
JPS5574045A (en) Electron gun device for cathode-ray tube
JPS54150962A (en) Electronic gun for cathode-ray tube
JPS56168325A (en) Flat type cathode-ray tube