JPS5484966A - Cathode-ray tube electron gun - Google Patents
Cathode-ray tube electron gunInfo
- Publication number
- JPS5484966A JPS5484966A JP15242277A JP15242277A JPS5484966A JP S5484966 A JPS5484966 A JP S5484966A JP 15242277 A JP15242277 A JP 15242277A JP 15242277 A JP15242277 A JP 15242277A JP S5484966 A JPS5484966 A JP S5484966A
- Authority
- JP
- Japan
- Prior art keywords
- magnet
- focused
- focus
- fluorescent
- face
- 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 facilitate focus adjustment and reduce weight and cubic volume by using a conductive permanent magnet as a focusing magnetic field generation means and storing this magnet in a vacuum outside vessel and applying the focus adjusting voltage to this magnet according to demand to focus an image on a fluorescent face.
CONSTITUTION: Electrons from cathode electrode 3 heated by heater 2 are focused by a triple-pole lens, which is constituted by first and second grid electrodes 4 and 5, and a pre-focus lens, thereby forming crossovers. Next, focused electrons are accelerated with a fixed divergence by third grid electrode 6, and are focused by fourth grid electrode 8, and are irradiated onto a fluorescent substrance face. At this time, cylindrical permanent magnet 7b which is made from conductive material such as an Alnico-system magnet is arranged between electrodes 6 and 8. When prescribed voltage E2 is applied to magnet 7b from the external in this constitution, an image can be focused onto the fluorescent face completely, and no electromagnetic focusing coil provided outside the vacuum outside vessel is required.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15242277A JPS5484966A (en) | 1977-12-20 | 1977-12-20 | Cathode-ray tube electron gun |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15242277A JPS5484966A (en) | 1977-12-20 | 1977-12-20 | Cathode-ray tube electron gun |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5484966A true JPS5484966A (en) | 1979-07-06 |
JPS6138574B2 JPS6138574B2 (en) | 1986-08-29 |
Family
ID=15540159
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15242277A Granted JPS5484966A (en) | 1977-12-20 | 1977-12-20 | Cathode-ray tube electron gun |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5484966A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60180045A (en) * | 1984-02-24 | 1985-09-13 | Matsushita Electronics Corp | Method of manufacturing cathode ray tube |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5026274U (en) * | 1973-07-03 | 1975-03-26 |
-
1977
- 1977-12-20 JP JP15242277A patent/JPS5484966A/en active Granted
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5026274U (en) * | 1973-07-03 | 1975-03-26 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60180045A (en) * | 1984-02-24 | 1985-09-13 | Matsushita Electronics Corp | Method of manufacturing cathode ray tube |
JPH0365607B2 (en) * | 1984-02-24 | 1991-10-14 |
Also Published As
Publication number | Publication date |
---|---|
JPS6138574B2 (en) | 1986-08-29 |
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