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JPS5788651A - Inline type three-beam electron gun - Google Patents

Inline type three-beam electron gun

Info

Publication number
JPS5788651A
JPS5788651A JP16730080A JP16730080A JPS5788651A JP S5788651 A JPS5788651 A JP S5788651A JP 16730080 A JP16730080 A JP 16730080A JP 16730080 A JP16730080 A JP 16730080A JP S5788651 A JPS5788651 A JP S5788651A
Authority
JP
Japan
Prior art keywords
round holes
opposed surface
holes
electrode
principal lens
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
JP16730080A
Other languages
Japanese (ja)
Other versions
JPS6324293B2 (en
Inventor
Masaya Takenobu
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 JP16730080A priority Critical patent/JPS5788651A/en
Publication of JPS5788651A publication Critical patent/JPS5788651A/en
Publication of JPS6324293B2 publication Critical patent/JPS6324293B2/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
    • H01J29/50—Electron guns two or more guns in a single vacuum space, e.g. for plural-ray tube
    • H01J29/503—Three or more guns, the axes of which lay in a common plane

Abstract

PURPOSE:To eliminate the astigmatism of a principal lens by forming three round holes on the opposed surface of two box-type electrodes which constitute the principal lens so that a part of each of these holes can be connected to the adjacent one and installing an electrode with three independent round holes a specified distance apart backward from the opposed surface. CONSTITUTION:Three electron beam passing holes (a) are formed on the opposed surface of the box-type third grid 5 and fourth grid 4 which constitute a principal lens so that their diameters can be larger than the hole interval and each round hole (a) is connected to the adjacent one. The second electrode 9 provided with three independent round holes (a1) is installed a distance ''l'' apart backward from its opposed surface. The three round holes (a1) of the second electrode 9 are provided concentrically with the before mentioned three round holes (a). As a result, the rotary symmetry of the principal lens is maintained in comparatively satisfactory condition and astigmatism can be eliminated.
JP16730080A 1980-11-25 1980-11-25 Inline type three-beam electron gun Granted JPS5788651A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16730080A JPS5788651A (en) 1980-11-25 1980-11-25 Inline type three-beam electron gun

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16730080A JPS5788651A (en) 1980-11-25 1980-11-25 Inline type three-beam electron gun

Publications (2)

Publication Number Publication Date
JPS5788651A true JPS5788651A (en) 1982-06-02
JPS6324293B2 JPS6324293B2 (en) 1988-05-20

Family

ID=15847192

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16730080A Granted JPS5788651A (en) 1980-11-25 1980-11-25 Inline type three-beam electron gun

Country Status (1)

Country Link
JP (1) JPS5788651A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5954151A (en) * 1982-08-25 1984-03-28 エヌ・ベ−・フイリツプス・フル−イランペンフアブリケン Color display tube

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5954151A (en) * 1982-08-25 1984-03-28 エヌ・ベ−・フイリツプス・フル−イランペンフアブリケン Color display tube

Also Published As

Publication number Publication date
JPS6324293B2 (en) 1988-05-20

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