FR2349950A1 - Colour CRT beam path adjusting magnetic module - has two opposite toroidal magnets with preset different flux density - Google Patents
Colour CRT beam path adjusting magnetic module - has two opposite toroidal magnets with preset different flux densityInfo
- Publication number
- FR2349950A1 FR2349950A1 FR7612297A FR7612297A FR2349950A1 FR 2349950 A1 FR2349950 A1 FR 2349950A1 FR 7612297 A FR7612297 A FR 7612297A FR 7612297 A FR7612297 A FR 7612297A FR 2349950 A1 FR2349950 A1 FR 2349950A1
- Authority
- FR
- France
- Prior art keywords
- magnet
- flux density
- beam path
- magnetic module
- magnets
- 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
- H01J29/70—Arrangements for deflecting ray or beam
- H01J29/701—Systems for correcting deviation or convergence of a plurality of beams by means of magnetic fields at least
- H01J29/702—Convergence correction arrangements therefor
- H01J29/703—Static convergence systems
Landscapes
- Video Image Reproduction Devices For Color Tv Systems (AREA)
Abstract
The beam path of a colour television cathode-ray tube is adjusted by a magnetic module with two opposite toroidal magnets mounted on the circumference of the tube neck. The flux density of the magnet on the input side of the electron beam is greater than that of the magnet on the output side. Preferably the density difference is 10 to 30%. Each magnet is typically of barium ferrite, and the two magnets are mounted opposite each other with intermediate non-magnetic spacers in between. The colour cathode-ray tube is of inline type. If permanent magnets are used, they are so magnetised that poles of alternating polarity appear along their circumference. In such case each magnet has a radially extending lug.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7612297A FR2349950A1 (en) | 1976-04-26 | 1976-04-26 | Colour CRT beam path adjusting magnetic module - has two opposite toroidal magnets with preset different flux density |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7612297A FR2349950A1 (en) | 1976-04-26 | 1976-04-26 | Colour CRT beam path adjusting magnetic module - has two opposite toroidal magnets with preset different flux density |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2349950A1 true FR2349950A1 (en) | 1977-11-25 |
FR2349950B1 FR2349950B1 (en) | 1980-08-29 |
Family
ID=9172313
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7612297A Granted FR2349950A1 (en) | 1976-04-26 | 1976-04-26 | Colour CRT beam path adjusting magnetic module - has two opposite toroidal magnets with preset different flux density |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR2349950A1 (en) |
-
1976
- 1976-04-26 FR FR7612297A patent/FR2349950A1/en active Granted
Also Published As
Publication number | Publication date |
---|---|
FR2349950B1 (en) | 1980-08-29 |
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