JPS54157467A - Electron gun for cathode-ray tube - Google Patents
Electron gun for cathode-ray tubeInfo
- Publication number
- JPS54157467A JPS54157467A JP6581578A JP6581578A JPS54157467A JP S54157467 A JPS54157467 A JP S54157467A JP 6581578 A JP6581578 A JP 6581578A JP 6581578 A JP6581578 A JP 6581578A JP S54157467 A JPS54157467 A JP S54157467A
- Authority
- JP
- Japan
- Prior art keywords
- cathode
- diameter
- lens
- aberration
- electrodes
- 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 obtain a lens system featuring a reduced amount of the crossover and the aberration by adding the noses mainly at the 2nd grid and the electrode near the grid.
CONSTITUTION: A small-diameter cylindrical projection part, so-called the nose, containing the electrode hole is provided on the end bottom surface of electrodes G2 excluding G1 among the electrodes distributed among cathode K and electrode G3 which is closest to the cathode among the electrodes forming the main lens. The protruded length l of the nose is set longer than diameter d of the cylindrical part. Thus, G2 is separated into two parts belonging to different systems, that is, G2-1 part forming the cathode lens and G2-2 part forming the prefocus lens. As a result, a proper shape and size suited to each function can be obtained in a comparatively free way, realizing a prefocus lens featuring an extremely small aberration. And thus the state of the beam spot can be improved greatly. The aberration can be further reduced if the aperture of G3 opposing to G2 is formed cylindrical with its diameter D3 set nearly identical to diameter D2 of G2 at the side of G3.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6581578A JPS54157467A (en) | 1978-06-02 | 1978-06-02 | Electron gun for cathode-ray tube |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6581578A JPS54157467A (en) | 1978-06-02 | 1978-06-02 | Electron gun for cathode-ray tube |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS54157467A true JPS54157467A (en) | 1979-12-12 |
JPH044685B2 JPH044685B2 (en) | 1992-01-29 |
Family
ID=13297889
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6581578A Granted JPS54157467A (en) | 1978-06-02 | 1978-06-02 | Electron gun for cathode-ray tube |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54157467A (en) |
-
1978
- 1978-06-02 JP JP6581578A patent/JPS54157467A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPH044685B2 (en) | 1992-01-29 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS5553853A (en) | Electron gun structure | |
JPS5750749A (en) | Electromagnetic deflection type cathode ray tube | |
JPS5831696B2 (en) | Electron gun for cathode ray tube | |
JPS6441147A (en) | Cathode ray tube with in-line electron gun | |
GB940480A (en) | Electron discharge device | |
JPS54157467A (en) | Electron gun for cathode-ray tube | |
JPS5553842A (en) | Direct heating cathode structure | |
KR870000281B1 (en) | Electron-gun for a c.r.t. | |
JPS56128551A (en) | Electron gun | |
JPS57128433A (en) | High luminance electron gun | |
GB941734A (en) | Improvements in electron gun | |
KR910003742A (en) | Electron gun for colored cathode ray tube | |
JPS57182948A (en) | Electron gun for cathode-ray tube | |
JPS54150961A (en) | Electronic gun for cathode-ray tube | |
JPS5489472A (en) | Electron gun for cathode-ray tube | |
JPS5669755A (en) | Electron gun | |
JPS57174834A (en) | Electrostatic deflection type cathode ray tube | |
JPS54156467A (en) | Electron gun constituent for color receiving tube | |
JPS57163952A (en) | Electron gun for braun tube | |
JPS553105A (en) | Electron gun | |
KR830000494B1 (en) | Electron gun for cathode ray tube | |
JPS54157076A (en) | Electron gun | |
JPS5583134A (en) | Electron gun for cathode ray tube | |
JPS5471551A (en) | Electron gun | |
KR940010985B1 (en) | Electron gun for c-crt |