JPS55166851A - Electromagnetic focussing type cathode-ray tube - Google Patents
Electromagnetic focussing type cathode-ray tubeInfo
- Publication number
- JPS55166851A JPS55166851A JP7465979A JP7465979A JPS55166851A JP S55166851 A JPS55166851 A JP S55166851A JP 7465979 A JP7465979 A JP 7465979A JP 7465979 A JP7465979 A JP 7465979A JP S55166851 A JPS55166851 A JP S55166851A
- Authority
- JP
- Japan
- Prior art keywords
- focussing
- fluorescent screen
- electromagnetic
- beam spots
- ray tube
- 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
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 make round the shape of beam spots on the fluorescent screen by providing a means which does not make round the electron beam spots which are incident on the electromagnetic focussing site at the front stage of the electromagnetic focussing site. CONSTITUTION:The first grid electrode 23 has the non-disk type elliptical electron beams passing hole 23a and its long axis which is slightly inclined from the Y axis. When the electron beam radiated from the cathode 2 pass through this first grid electrode, direction (y) receives weaker focussing and the crossover of the electron beams moves on the fluorescent screen side. This moves the image point in the direction of (y) on the fluorescent screen side on it. By focussing the image point on the fluorescent screen in both the directions (x) and (y), the shape of the beam spots is made round.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7465979A JPS55166851A (en) | 1979-06-15 | 1979-06-15 | Electromagnetic focussing type cathode-ray tube |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7465979A JPS55166851A (en) | 1979-06-15 | 1979-06-15 | Electromagnetic focussing type cathode-ray tube |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS55166851A true JPS55166851A (en) | 1980-12-26 |
JPH0142110B2 JPH0142110B2 (en) | 1989-09-11 |
Family
ID=13553575
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7465979A Granted JPS55166851A (en) | 1979-06-15 | 1979-06-15 | Electromagnetic focussing type cathode-ray tube |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55166851A (en) |
-
1979
- 1979-06-15 JP JP7465979A patent/JPS55166851A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPH0142110B2 (en) | 1989-09-11 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS5750749A (en) | Electromagnetic deflection type cathode ray tube | |
ES8502810A1 (en) | Cathode-ray tube. | |
MX165597B (en) | IMPROVED COLOR DISPLAY SYSTEM | |
EP0899768A3 (en) | Color cathode-ray tube electron gun | |
MY121025A (en) | Color cathode ray tube with inline electron gun with variable distances of side beam passing holes from the central beam passing axis. | |
ES2020686A6 (en) | Electron gun for cathode ray tube | |
JPS5559637A (en) | Magnetic focus cathode ray tube | |
JPS55166851A (en) | Electromagnetic focussing type cathode-ray tube | |
JPS54150961A (en) | Electronic gun for cathode-ray tube | |
JPS54133070A (en) | Constituent for electron gun | |
JPS5723449A (en) | Electron gun for cathode ray tube | |
JPS5784554A (en) | Cathode-ray tube device | |
JPS545374A (en) | Electronic gun | |
EP0778605A3 (en) | An electron gun assembly for a color cathode ray tube apparatus | |
JPS54150962A (en) | Electronic gun for cathode-ray tube | |
US4503354A (en) | Camera tubes | |
JPS5749150A (en) | Electromagnetic focussing cathode-ray tube | |
JPS57182948A (en) | Electron gun for cathode-ray tube | |
JPS5535450A (en) | Electromagnetic focusing type cathode ray tube | |
JPS57199147A (en) | Electron gun structure | |
JPS5679842A (en) | Electromagnetic focusing picture tube | |
JPS55113245A (en) | Flat type cathode ray tube | |
KR950004348A (en) | Electron gun for color cathode ray tube | |
JPS55148340A (en) | Cathode ray tube for light source | |
JPS5231657A (en) | Assembling method of electron gun |