JPS575247A - Electromagnetic focusing cathode ray tube - Google Patents
Electromagnetic focusing cathode ray tubeInfo
- Publication number
- JPS575247A JPS575247A JP7772980A JP7772980A JPS575247A JP S575247 A JPS575247 A JP S575247A JP 7772980 A JP7772980 A JP 7772980A JP 7772980 A JP7772980 A JP 7772980A JP S575247 A JPS575247 A JP S575247A
- Authority
- JP
- Japan
- Prior art keywords
- electron beam
- distance
- main lens
- sections
- 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.)
- Pending
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
- H01J29/58—Arrangements for focusing or reflecting ray or beam
- H01J29/64—Magnetic lenses
Abstract
PURPOSE:To release the shifting of STC(where the electron beam is not focused at one point.) by bringing the ratio of the distance between the center of the outside electron beam pass hole and the tube axis and the facing distance between the main lens forming electrodes into specific range. CONSTITUTION:The electrodes 3a, 3b for forming the electrostatic main lens of an inline integrated electron gun are made of magnetic member while a permanent magnet 1 is located at the neck section to form a magnetic main lens between facing planar sections 2a, 2b. Electron beam pass holes 20-22 are formed with distance (s) at said sections 2a, 2b. Assuming the facing distance at said sections 2a, 2b is Lg, the value of (s) should be set to satisfy 0.5s<Lg<2.5s. Consequently three electron beam can be focused to one point under nondeflection.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7772980A JPS575247A (en) | 1980-06-11 | 1980-06-11 | Electromagnetic focusing cathode ray tube |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7772980A JPS575247A (en) | 1980-06-11 | 1980-06-11 | Electromagnetic focusing cathode ray tube |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS575247A true JPS575247A (en) | 1982-01-12 |
Family
ID=13641981
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7772980A Pending JPS575247A (en) | 1980-06-11 | 1980-06-11 | Electromagnetic focusing cathode ray tube |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS575247A (en) |
-
1980
- 1980-06-11 JP JP7772980A patent/JPS575247A/en active Pending
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