ES475304A1 - Electron gun for in-line colour crt - Google Patents

Electron gun for in-line colour crt

Info

Publication number
ES475304A1
ES475304A1 ES475304A ES475304A ES475304A1 ES 475304 A1 ES475304 A1 ES 475304A1 ES 475304 A ES475304 A ES 475304A ES 475304 A ES475304 A ES 475304A ES 475304 A1 ES475304 A1 ES 475304A1
Authority
ES
Spain
Prior art keywords
lens system
focussing
electrodes
line colour
electron gun
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
ES475304A
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.)
Toshiba Corp
Original Assignee
Tokyo Shibaura Electric Co Ltd
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
Priority claimed from JP13948077A external-priority patent/JPS5472667A/en
Priority claimed from JP15650177A external-priority patent/JPS5489472A/en
Application filed by Tokyo Shibaura Electric Co Ltd filed Critical Tokyo Shibaura Electric Co Ltd
Publication of ES475304A1 publication Critical patent/ES475304A1/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
    • H01J29/48—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
    • 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

Landscapes

  • Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
  • Video Image Reproduction Devices For Color Tv Systems (AREA)

Abstract

The electro gun for an in-line colour CRT has at least one cathode and two electrodes and a main lens system for electron beam focussing. The lens system consists of four focussing electrodes arranged coaxially. The potential in the lens system decreases monotonically in an axial direction from a relatively medium value at the first two focussing electrodes to a relatively low level, from which it again rises to a relatively high level. This second derivative of the axial potential distribution function has two positive and three negative peaks. The magnetic field generated by a deflection yoke has a very uniform distribution.
ES475304A 1977-11-22 1978-11-22 Electron gun for in-line colour crt Expired ES475304A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP13948077A JPS5472667A (en) 1977-11-22 1977-11-22 Electron gun for cathode ray tube
JP15650177A JPS5489472A (en) 1977-12-27 1977-12-27 Electron gun for cathode-ray tube

Publications (1)

Publication Number Publication Date
ES475304A1 true ES475304A1 (en) 1979-03-16

Family

ID=26472282

Family Applications (1)

Application Number Title Priority Date Filing Date
ES475304A Expired ES475304A1 (en) 1977-11-22 1978-11-22 Electron gun for in-line colour crt

Country Status (2)

Country Link
DE (1) DE2850656C2 (en)
ES (1) ES475304A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3373746D1 (en) * 1982-12-29 1987-10-22 Matsushita Electronics Corp Cathode ray tube

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE416227A (en) * 1935-06-25
DE909123C (en) * 1948-11-27 1954-04-15 Siemens Ag Cathode ray oscillograph
GB825898A (en) * 1957-08-13 1959-12-23 Gen Electric Co Ltd Improvements in or relating to electric circuit arrangements incorporating cathode ray tubes
JPS5743972B1 (en) * 1971-02-05 1982-09-18
US3895253A (en) * 1973-10-23 1975-07-15 Zenith Radio Corp Electron gun having extended field electrostatic focus lens

Also Published As

Publication number Publication date
DE2850656A1 (en) 1979-05-23
DE2850656C2 (en) 1984-04-19

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Legal Events

Date Code Title Description
FD1A Patent lapsed

Effective date: 19990206