JPS57196455A - Electron gun for braun tube - Google Patents

Electron gun for braun tube

Info

Publication number
JPS57196455A
JPS57196455A JP8102281A JP8102281A JPS57196455A JP S57196455 A JPS57196455 A JP S57196455A JP 8102281 A JP8102281 A JP 8102281A JP 8102281 A JP8102281 A JP 8102281A JP S57196455 A JPS57196455 A JP S57196455A
Authority
JP
Japan
Prior art keywords
electrode
grid
electron gun
diameter
projection supporting
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
JP8102281A
Other languages
Japanese (ja)
Other versions
JPH0216537B2 (en
Inventor
Yoshihiko Miyata
Koichi Nakajima
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 JP8102281A priority Critical patent/JPS57196455A/en
Publication of JPS57196455A publication Critical patent/JPS57196455A/en
Publication of JPH0216537B2 publication Critical patent/JPH0216537B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
    • H01J29/46—Arrangements of electrodes and associated parts for generating or controlling the ray or beam, e.g. electron-optical arrangement
    • H01J29/48—Electron guns
    • H01J29/485—Construction of the gun or of parts thereof

Abstract

PURPOSE:To enable an electron gun having a large-aperture electron lens to be easily assembled with high accuracy by providing the end of a large-inner- diameter electrode with a recessed part, which is made close to the axis of the electron gun to such a degree that it doesn't touch the smaller outer diameter part of a two-outer-diameter electrode, and making the large-inner-diameter electrode to be supported by an insulating member by means of a projection supporting part provided at the said recessed part. CONSTITUTION:By making the outer diameter (d) of a third-grid-projection supporting part 53 smaller than the inner diameter (D) of a fourth grid 6, the part 53 can be easily passed through the end of the grid 6 by rotating the diametral part of the part 53 apart from the diametral part of a fourth-grid-projection supporting part 62 (a recessed part 61) at an appropriate angle of (theta). After the passing of the part 53, the rotational angle (theta) is returned back to zero so as to make the electrodes to be coaxially supported by an insulating member 7. In assembling the electron gun of this invention, there is no work of connecting two parts divided in the axial direction into one electrode. Besides, any axial shift which might be caused when only one electrode is used is prevented, and the number of assembling processes is reduced.
JP8102281A 1981-05-29 1981-05-29 Electron gun for braun tube Granted JPS57196455A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8102281A JPS57196455A (en) 1981-05-29 1981-05-29 Electron gun for braun tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8102281A JPS57196455A (en) 1981-05-29 1981-05-29 Electron gun for braun tube

Publications (2)

Publication Number Publication Date
JPS57196455A true JPS57196455A (en) 1982-12-02
JPH0216537B2 JPH0216537B2 (en) 1990-04-17

Family

ID=13734850

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8102281A Granted JPS57196455A (en) 1981-05-29 1981-05-29 Electron gun for braun tube

Country Status (1)

Country Link
JP (1) JPS57196455A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0203805A2 (en) * 1985-05-28 1986-12-03 Sony Corporation Electron guns
JPH01258346A (en) * 1988-04-08 1989-10-16 Hitachi Ltd Electron gun for cathode-ray tube
US5894190A (en) * 1996-03-22 1999-04-13 Hitachi, Ltd. Color cathode ray tube having a large-diameter lens

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0203805A2 (en) * 1985-05-28 1986-12-03 Sony Corporation Electron guns
JPH01258346A (en) * 1988-04-08 1989-10-16 Hitachi Ltd Electron gun for cathode-ray tube
US5894190A (en) * 1996-03-22 1999-04-13 Hitachi, Ltd. Color cathode ray tube having a large-diameter lens

Also Published As

Publication number Publication date
JPH0216537B2 (en) 1990-04-17

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