JPS5519730A - Electron gun - Google Patents
Electron gunInfo
- 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
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
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)
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4852371A (en) * | 1971-11-01 | 1973-07-23 | ||
JPS4958745A (en) * | 1972-06-24 | 1974-06-07 |
-
1978
- 1978-07-27 JP JP9224778A patent/JPS5519730A/en active Granted
Patent Citations (2)
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)
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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