JPS54157468A - Interior conducting coat of cathode-ray tube - Google Patents

Interior conducting coat of cathode-ray tube

Info

Publication number
JPS54157468A
JPS54157468A JP6581678A JP6581678A JPS54157468A JP S54157468 A JPS54157468 A JP S54157468A JP 6581678 A JP6581678 A JP 6581678A JP 6581678 A JP6581678 A JP 6581678A JP S54157468 A JPS54157468 A JP S54157468A
Authority
JP
Japan
Prior art keywords
cathode
ray tube
funnel
coat
glass
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
JP6581678A
Other languages
Japanese (ja)
Other versions
JPS6124781B2 (en
Inventor
Shigemi Hirasawa
Hiromitsu Kawamura
Hiromi Kanai
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 JP6581678A priority Critical patent/JPS54157468A/en
Publication of JPS54157468A publication Critical patent/JPS54157468A/en
Publication of JPS6124781B2 publication Critical patent/JPS6124781B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
  • Surface Treatment Of Glass (AREA)

Abstract

PURPOSE: To reduce the current value at the short-circuit discharge time by forming part of the conducting coat to be provided on the glass inner wall of the cathode-ray tube with the semiconductor glass composed mainly of V2O5, BaO and P2O5 with the resistivity of 106W1012Ωcm and thus causing the resistance of 0.3W30MΩ at the feeder line.
CONSTITUTION: The cathode-ray tube comprises panel 1, funnel 2, funnel interior graphite coat 3, high voltage supply electrode 5, neck interior graphite coat 6 and electron gun 7 each. Then smeiconductor glass coat 5 featuring the thickness of 20μm and resistivity of about 4×104 is coated on the inner surface of funnel 2 in the distance of 12W42mm from reference line 8 of funnel 2. For this purpose, the semiconductor glass of 106W1012 Ωcm resistivity is mixed with the nitrocellulose and butyl acetate via the impalpable powder of V2O5 of 60 mol%, BaO of 10% and P2O5 of 30%. The semiconductor glass of such composition is then applied and burnt. Thus, the resistance of 0.3W30MΩ is provided between the high voltage supply terminal of the cathode-ray tube and that of the electronic gun in order to block the discharged current.
COPYRIGHT: (C)1979,JPO&Japio
JP6581678A 1978-06-02 1978-06-02 Interior conducting coat of cathode-ray tube Granted JPS54157468A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6581678A JPS54157468A (en) 1978-06-02 1978-06-02 Interior conducting coat of cathode-ray tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6581678A JPS54157468A (en) 1978-06-02 1978-06-02 Interior conducting coat of cathode-ray tube

Publications (2)

Publication Number Publication Date
JPS54157468A true JPS54157468A (en) 1979-12-12
JPS6124781B2 JPS6124781B2 (en) 1986-06-12

Family

ID=13297918

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6581678A Granted JPS54157468A (en) 1978-06-02 1978-06-02 Interior conducting coat of cathode-ray tube

Country Status (1)

Country Link
JP (1) JPS54157468A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55150539A (en) * 1979-05-14 1980-11-22 Hitachi Ltd Cathode-ray tube
JPS5682555A (en) * 1979-12-07 1981-07-06 Toshiba Corp Cathode ray tube

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55150539A (en) * 1979-05-14 1980-11-22 Hitachi Ltd Cathode-ray tube
JPS5682555A (en) * 1979-12-07 1981-07-06 Toshiba Corp Cathode ray tube

Also Published As

Publication number Publication date
JPS6124781B2 (en) 1986-06-12

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