JPS54139460A - Dielectric strength process method for color picture tube - Google Patents

Dielectric strength process method for color picture tube

Info

Publication number
JPS54139460A
JPS54139460A JP4666378A JP4666378A JPS54139460A JP S54139460 A JPS54139460 A JP S54139460A JP 4666378 A JP4666378 A JP 4666378A JP 4666378 A JP4666378 A JP 4666378A JP S54139460 A JPS54139460 A JP S54139460A
Authority
JP
Japan
Prior art keywords
voltage
combination
high voltage
electrodes
frequency
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
JP4666378A
Other languages
Japanese (ja)
Inventor
Osamu Yasutome
Noboru Shibuya
Toyoshi 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.)
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 JP4666378A priority Critical patent/JPS54139460A/en
Publication of JPS54139460A publication Critical patent/JPS54139460A/en
Pending legal-status Critical Current

Links

Landscapes

  • Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)

Abstract

PURPOSE: To reduce greatly the occurence of the discharge between electrode, the stray emission, the leak between electrodes and others, by applying the high voltage, the high frequency voltage or the DC high voltage or irregular and regular waves in combination between the electrodes of the electron gun.
CONSTITUTION: For the 1st combination of the voltage, the irregular wave high voltage including the high frequency generated when the voltage of the commercial frequency is amplified to be turned to the high voltage and the regular wave high voltage with which the commercial frequency is given the high voltage up to the prescriber voltage are applied alternately for several to several tens seconds with the voltage increased gradually in order to eliminate the conductive foreign matters sticked to the electrode surface, the lead wire and others, the projected part, the field emission source and others. For the 2nd combination of the voltage, the irregular wave frequency voltage requiring an extremely small amount of application voltage is added to the 1st voltage combination, and thus the reverse effect can be covered for the over-process caused by application of the irregular wave high voltage with elimination of the minute foreign matters. For the 3rd combination of the voltage, the DC voltage of 100W120% rated level is applied to the 1st or 2nd voltage combination between electrodes, thus ensuring the steady characteristics of the electron gun.
COPYRIGHT: (C)1979,JPO&Japio
JP4666378A 1978-04-21 1978-04-21 Dielectric strength process method for color picture tube Pending JPS54139460A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4666378A JPS54139460A (en) 1978-04-21 1978-04-21 Dielectric strength process method for color picture tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4666378A JPS54139460A (en) 1978-04-21 1978-04-21 Dielectric strength process method for color picture tube

Publications (1)

Publication Number Publication Date
JPS54139460A true JPS54139460A (en) 1979-10-29

Family

ID=12753572

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4666378A Pending JPS54139460A (en) 1978-04-21 1978-04-21 Dielectric strength process method for color picture tube

Country Status (1)

Country Link
JP (1) JPS54139460A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5912542A (en) * 1982-07-13 1984-01-23 Toshiba Corp Method for withstand voltage treatment of cathode ray tube

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5912542A (en) * 1982-07-13 1984-01-23 Toshiba Corp Method for withstand voltage treatment of cathode ray tube

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