JPS5519728A - Electron gun - Google Patents

Electron gun

Info

Publication number
JPS5519728A
JPS5519728A JP9224578A JP9224578A JPS5519728A JP S5519728 A JPS5519728 A JP S5519728A JP 9224578 A JP9224578 A JP 9224578A JP 9224578 A JP9224578 A JP 9224578A JP S5519728 A JPS5519728 A JP S5519728A
Authority
JP
Japan
Prior art keywords
grid electrode
ratio
hole diameter
electrode
thickness
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
JP9224578A
Other languages
Japanese (ja)
Other versions
JPH0318294B2 (en
Inventor
Hiroshi Suzuki
Katsuyuki Yamashita
Masao Natsuhara
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 JP9224578A priority Critical patent/JPS5519728A/en
Publication of JPS5519728A publication Critical patent/JPS5519728A/en
Publication of JPH0318294B2 publication Critical patent/JPH0318294B2/ja
Granted legal-status Critical Current

Links

Abstract

PURPOSE: To make the beam spot diameter widely reducible when in a big current, by providing the ratio, within a prescribed range, of the thickness of a second grid electrode and the distance, between the second grid electrode and third grid electrode, with respect to the hole diameter of a first grid electrode.
CONSTITUTION: The ratio of a distance g3, between a second grid electrode 3 and a third grid electrode 6, with respect to the hole diameter D1 of a first grid electrode 2, g3/D1 is made less than 1.5, with an aberration of cathode lens reduced. And from the view point of manufacturing convenience and dielectric strength between the electrodes, g3/D1 is made more than 0.4. On the other hand, the ratio t2/D1, of the thickness t2 of the second electrode 3 for the hole diameter D1 of the first grid electrode 2, is made within a range of 0.4 to 1, and a be angle 12 is maintained at an accurate value with a lowering of the beam spot while being prevented. Conditional formula of the above is determined as shown below. [0.4≤t2/D1≤1, 0.4≤g3 /D1≤1.5].
COPYRIGHT: (C)1980,JPO&Japio
JP9224578A 1978-07-27 1978-07-27 Electron gun Granted JPS5519728A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9224578A JPS5519728A (en) 1978-07-27 1978-07-27 Electron gun

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9224578A JPS5519728A (en) 1978-07-27 1978-07-27 Electron gun

Publications (2)

Publication Number Publication Date
JPS5519728A true JPS5519728A (en) 1980-02-12
JPH0318294B2 JPH0318294B2 (en) 1991-03-12

Family

ID=14049037

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9224578A Granted JPS5519728A (en) 1978-07-27 1978-07-27 Electron gun

Country Status (1)

Country Link
JP (1) JPS5519728A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5996635A (en) * 1982-10-29 1984-06-04 エヌ・ベ−・フイリツプス・フル−イランペンフアブリケン Cathode ray tube
JPS6194727A (en) * 1984-10-15 1986-05-13 Aida Eng Ltd Plastic mold

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5996635A (en) * 1982-10-29 1984-06-04 エヌ・ベ−・フイリツプス・フル−イランペンフアブリケン Cathode ray tube
JPS6194727A (en) * 1984-10-15 1986-05-13 Aida Eng Ltd Plastic mold

Also Published As

Publication number Publication date
JPH0318294B2 (en) 1991-03-12

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