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JPS57176647A - In-line-type three-beam electron gun - Google Patents

In-line-type three-beam electron gun

Info

Publication number
JPS57176647A
JPS57176647A JP6172281A JP6172281A JPS57176647A JP S57176647 A JPS57176647 A JP S57176647A JP 6172281 A JP6172281 A JP 6172281A JP 6172281 A JP6172281 A JP 6172281A JP S57176647 A JPS57176647 A JP S57176647A
Authority
JP
Japan
Prior art keywords
holes
lens
circular
electron
grid
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
JP6172281A
Other languages
Japanese (ja)
Other versions
JPS6324294B2 (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 JP6172281A priority Critical patent/JPS57176647A/en
Publication of JPS57176647A publication Critical patent/JPS57176647A/en
Publication of JPS6324294B2 publication Critical patent/JPS6324294B2/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 obtain an electron lens having a small astigmatism and a small spherical aberration, increase the focusing degree of electron beams, and improve the resolving degree of a picture surface by providing three circular beam-passing holes in each of two box-like electrodes, which are opposed and form an electron lens, in an in-line arrangement so that the three holes are continuous. CONSTITUTION:Three circular holes (a) are provided in each of the opposed surfaces of a main-lens-side third grid 5 and a fourth grid 4, which face to one another so as to form an electron lens. The diameter of the above circular holes (a), which are connected to each other, is either equal to the distance between the holes (a) or larger than the distance between the holes (a). A cylindrical electrode 10 is provided with three independent circular holes (a) so that these holes (a) correspond to the above holes (a). Owing to the above constitution, the aperture of a main lens becomes close to that of the holes (a) of the opposed surfaces, and the angular symmetric property of the equipotential surface is relatively excellently secured by the cylinder electrode 10. Consequently, the electrostatic lens has a balanced astigmatism and a balanced spherical aberration.
JP6172281A 1981-04-22 1981-04-22 In-line-type three-beam electron gun Granted JPS57176647A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6172281A JPS57176647A (en) 1981-04-22 1981-04-22 In-line-type three-beam electron gun

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6172281A JPS57176647A (en) 1981-04-22 1981-04-22 In-line-type three-beam electron gun

Publications (2)

Publication Number Publication Date
JPS57176647A true JPS57176647A (en) 1982-10-30
JPS6324294B2 JPS6324294B2 (en) 1988-05-20

Family

ID=13179390

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6172281A Granted JPS57176647A (en) 1981-04-22 1981-04-22 In-line-type three-beam electron gun

Country Status (1)

Country Link
JP (1) JPS57176647A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5864740A (en) * 1981-10-12 1983-04-18 Nec Corp Electron-gun electrode structure

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0247354A (en) * 1988-08-09 1990-02-16 Hideki Nakamura Method for detaching cheese from carrier and plate for detaching
JPH0512316Y2 (en) * 1989-08-21 1993-03-29

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5864740A (en) * 1981-10-12 1983-04-18 Nec Corp Electron-gun electrode structure

Also Published As

Publication number Publication date
JPS6324294B2 (en) 1988-05-20

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