JPS5519730A - Electron gun - Google Patents

Electron gun

Info

Publication number
JPS5519730A
JPS5519730A JP9224778A JP9224778A JPS5519730A JP S5519730 A JPS5519730 A JP S5519730A JP 9224778 A JP9224778 A JP 9224778A JP 9224778 A JP9224778 A JP 9224778A JP S5519730 A JPS5519730 A JP S5519730A
Authority
JP
Japan
Prior art keywords
electrode
hole diameter
grid
diameter
distance
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
JP9224778A
Other languages
Japanese (ja)
Other versions
JPH0253904B2 (en
Inventor
Hiroshi Suzuki
Katsuyuki Yamashita
Kanji Shima
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electronics 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 Matsushita Electronics Corp filed Critical Matsushita Electronics Corp
Priority to JP9224778A priority Critical patent/JPS5519730A/en
Publication of JPS5519730A publication Critical patent/JPS5519730A/en
Publication of JPH0253904B2 publication Critical patent/JPH0253904B2/ja
Granted legal-status Critical Current

Links

Abstract

PURPOSE: To widely reduce the beam spot diameter when in a big current, by means of setting ratios, so as to be in a prescribed range respectively, between the distance across G2 electrode to G3 electrode, and the hole diameter of G1 electrode, and between the hole diameters of each G2, G1 electrode.
CONSTITUTION: The ratio of a distance g3, between the second grid G2 electrode 3 and the third grid G3 electrode 6, for the hole diameter D1 of the first grid G1 electrode, g3/D1, is made less than 1.5, with an aberration of cathode lens reduced and a crossover diameter 27 decreased. On the other hand, a hole diameter D2 of the G2 electrode 3, being made smaller than the hole diameter D1 of the G1 electrode 2, causes the beam, after a crossing point 24, 26 of the electron beam, to be effectively reduced, as well as a divergence angle 12 to be maintained at an accurate value. Moreover, as considered from the view point of manufacture and dielectric strength between the electrodes, g3/D1 is made more than 0.4. The setting condition of the above will be shown as 0.4≤g3/D1≤1.5, D2<D1.
COPYRIGHT: (C)1980,JPO&Japio
JP9224778A 1978-07-27 1978-07-27 Electron gun Granted JPS5519730A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9224778A JPS5519730A (en) 1978-07-27 1978-07-27 Electron gun

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9224778A JPS5519730A (en) 1978-07-27 1978-07-27 Electron gun

Publications (2)

Publication Number Publication Date
JPS5519730A true JPS5519730A (en) 1980-02-12
JPH0253904B2 JPH0253904B2 (en) 1990-11-20

Family

ID=14049088

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9224778A Granted JPS5519730A (en) 1978-07-27 1978-07-27 Electron gun

Country Status (1)

Country Link
JP (1) JPS5519730A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0237005A2 (en) * 1986-03-11 1987-09-16 Matsushita Electronics Corporation cathode ray tube for color display

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4852371A (en) * 1971-11-01 1973-07-23
JPS4958745A (en) * 1972-06-24 1974-06-07

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4852371A (en) * 1971-11-01 1973-07-23
JPS4958745A (en) * 1972-06-24 1974-06-07

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0237005A2 (en) * 1986-03-11 1987-09-16 Matsushita Electronics Corporation cathode ray tube for color display
EP0237005A3 (en) * 1986-03-11 1988-10-12 Matsushita Electronics Corporation Cathode ray tube for color display

Also Published As

Publication number Publication date
JPH0253904B2 (en) 1990-11-20

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