ES367021A1 - Low focus voltage electron gun for cathode-ray tubes - Google Patents

Low focus voltage electron gun for cathode-ray tubes

Info

Publication number
ES367021A1
ES367021A1 ES367021A ES367021A ES367021A1 ES 367021 A1 ES367021 A1 ES 367021A1 ES 367021 A ES367021 A ES 367021A ES 367021 A ES367021 A ES 367021A ES 367021 A1 ES367021 A1 ES 367021A1
Authority
ES
Spain
Prior art keywords
electrodes
edges
cathode
electron gun
lens
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.)
Expired
Application number
ES367021A
Other languages
Spanish (es)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zenith Electronics LLC
Original Assignee
Zenith Radio Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Zenith Radio Corp filed Critical Zenith Radio Corp
Publication of ES367021A1 publication Critical patent/ES367021A1/en
Expired legal-status Critical Current

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
    • H01J29/62—Electrostatic lenses
    • H01J29/622—Electrostatic lenses producing fields exhibiting symmetry of revolution
    • H01J29/624—Electrostatic lenses producing fields exhibiting symmetry of revolution co-operating with or closely associated to an electron gun
    • 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
    • H01J29/506—Electron guns two or more guns in a single vacuum space, e.g. for plural-ray tube guns in delta or circular configuration

Abstract

The edges of coaxial cylindrical electrodes forming an electrostatic lens are shaped to screen the lens from the effect of changes accumulating on the envelope of a cathode ray tube. Fig. 1 shows a colour television tube of the shadow mask-type using three electron guns each of which includes a lens system G3, G4, G5 the edges of the outer electrodes G3 and G5 are curved back at 31 and the edges of the centre electrodes G4 are curved in concentric arcs 30. The spacing between the electrodes should be small compared with the radial length of the flanges 30. When a blue lateral connection magnet is provided, the G3 electrodes of the red and green guns should preferably be of material of high permeability to protect these beams from the influence of the magnet the G4 electrodes should also be of high permeability material to shield the lenses from stray magnetic fields.
ES367021A 1968-05-10 1969-05-09 Low focus voltage electron gun for cathode-ray tubes Expired ES367021A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US72816368A 1968-05-10 1968-05-10

Publications (1)

Publication Number Publication Date
ES367021A1 true ES367021A1 (en) 1971-06-16

Family

ID=24925680

Family Applications (1)

Application Number Title Priority Date Filing Date
ES367021A Expired ES367021A1 (en) 1968-05-10 1969-05-09 Low focus voltage electron gun for cathode-ray tubes

Country Status (4)

Country Link
US (1) US3501668A (en)
DE (1) DE1922867A1 (en)
ES (1) ES367021A1 (en)
GB (1) GB1197556A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2031486A1 (en) * 1970-06-25 1971-12-30 Siemens Ag Electrostatic lens, especially for electrostatic vidicon
JPS5743972B1 (en) * 1971-02-05 1982-09-18
NL7404365A (en) * 1974-04-01 1975-10-03 Philips Nv CATHOD BEAM TUBE FOR DISPLAYING COLORED IMAGES.
JPH0656739B2 (en) * 1984-07-26 1994-07-27 株式会社東芝 Electron gun

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2971118A (en) * 1958-11-10 1961-02-07 Sylvania Electric Prod Electron discharge device

Also Published As

Publication number Publication date
DE1922867A1 (en) 1969-11-27
US3501668A (en) 1970-03-17
GB1197556A (en) 1970-07-08

Similar Documents

Publication Publication Date Title
GB1381018A (en) Inline electron gun
GB642083A (en) Improvements relating to cathode ray tubes
ES367021A1 (en) Low focus voltage electron gun for cathode-ray tubes
GB974304A (en) Cathode ray tube apparatus
GB993270A (en) Cathode ray tube
GB768747A (en) Improvements in or relating to devices for reproducing coloured television images
GB1242881A (en) Cathode ray tube
GB1019103A (en) Cathode ray tube
GB953881A (en) Low-power-deflection cathode ray tube
US2785330A (en) Internal pole piece arrangement for a magnetically-focused cathode ray tube
GB1003165A (en)
GB469897A (en) Improvements in or relating to cathode ray tubes
GB442724A (en) Braun tube
GB1073898A (en) Beam convergence apparatus for plural-beam cathode-ray tubes
GB776376A (en) Improvements relating to cathode ray-tubes for colour reproduction
US3728569A (en) Cathode-ray tube
GB821542A (en) Improvements in or relating to cathode ray tubes
ES8106633A1 (en) Cathode ray tube with multipole correction ring
GB801487A (en) Arrangement for connecting tangential and/or radial distortions in a cathode ray beam
GB865666A (en) Improvements in or relating to cathode ray tubes
GB1299329A (en) Cathode ray tube
GB1056320A (en) Cathode-ray tube devices
GB1243163A (en) Apparatus comprising a cathode-ray tube provided with an electron gun system for producing a number of electrom beams
GB1236045A (en) Manufacture of colour cathode ray tube screens
GB548147A (en) Improvements in or relating to cathode ray tubes