EP0843333A3 - Color cathode ray tube provided with a beam convergence adjustment device - Google Patents

Color cathode ray tube provided with a beam convergence adjustment device Download PDF

Info

Publication number
EP0843333A3
EP0843333A3 EP97119888A EP97119888A EP0843333A3 EP 0843333 A3 EP0843333 A3 EP 0843333A3 EP 97119888 A EP97119888 A EP 97119888A EP 97119888 A EP97119888 A EP 97119888A EP 0843333 A3 EP0843333 A3 EP 0843333A3
Authority
EP
European Patent Office
Prior art keywords
neck portion
ray tube
cathode ray
color cathode
adjustment device
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.)
Withdrawn
Application number
EP97119888A
Other languages
German (de)
French (fr)
Other versions
EP0843333A2 (en
Inventor
Kenji Suzuki
Hiroshi Yoshioka
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.)
Hitachi Ltd
Original Assignee
Hitachi 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
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Publication of EP0843333A2 publication Critical patent/EP0843333A2/en
Publication of EP0843333A3 publication Critical patent/EP0843333A3/en
Withdrawn legal-status Critical Current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
    • H01J29/64—Magnetic lenses
    • H01J29/68—Magnetic lenses using permanent magnets only
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2229/00—Details of cathode ray tubes or electron beam tubes
    • H01J2229/56—Correction of beam optics
    • H01J2229/568—Correction of beam optics using supplementary correction devices
    • H01J2229/5681—Correction of beam optics using supplementary correction devices magnetic
    • H01J2229/5682—Permanently magnetised materials, e.g. permanent magnets
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2229/00—Details of cathode ray tubes or electron beam tubes
    • H01J2229/70—Electron beam control outside the vessel
    • H01J2229/703—Electron beam control outside the vessel by magnetic fields

Landscapes

  • Video Image Reproduction Devices For Color Tv Systems (AREA)
  • Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)

Abstract

A color cathode ray tube includes an evacuated envelope (1) formed of a panel portion (1A) carrying a phosphor screen (4) on an inner surface thereof, a neck portion (1B), a funnel portion (1C) connecting the panel portion and the neck portion, a three-beam, in-line type electron gun (2) housed in the neck portion for generating a center electron beam and two side electron beams, a deflection device (6), adjustable magnetic field producing device (7, 12) mounted on the neck portion for moving the two side electron beams in mutually opposing directions, and a magnetic structure mounted on the neck portion for producing such a fixed magnetic field as to move the two side electron beams in mutually opposing directions.
EP97119888A 1996-11-14 1997-11-13 Color cathode ray tube provided with a beam convergence adjustment device Withdrawn EP0843333A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP30271496A JPH10144236A (en) 1996-11-14 1996-11-14 Color cathode-ray tube
JP302714/96 1996-11-14

Publications (2)

Publication Number Publication Date
EP0843333A2 EP0843333A2 (en) 1998-05-20
EP0843333A3 true EP0843333A3 (en) 1999-06-02

Family

ID=17912301

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97119888A Withdrawn EP0843333A3 (en) 1996-11-14 1997-11-13 Color cathode ray tube provided with a beam convergence adjustment device

Country Status (4)

Country Link
EP (1) EP0843333A3 (en)
JP (1) JPH10144236A (en)
KR (1) KR19980042445A (en)
SG (1) SG74603A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001185060A (en) 1999-12-24 2001-07-06 Hitachi Ltd In-line type color receiver tube
US7038368B2 (en) 2003-08-01 2006-05-02 Matsushita Toshiba Picture Display Co., Ltd. Color picture tube apparatus having a pair of bar shaped magnets for correcting misconvergence due to the rotational shift of the electron beams

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3725831A (en) * 1972-01-14 1973-04-03 Rca Corp Magnetic beam adjusting arrangements
US3808570A (en) * 1972-03-20 1974-04-30 Rca Corp Static convergence device for electron beams
US3898597A (en) * 1973-09-14 1975-08-05 Philips Corp Pairs of oppositely rotatable ring magnets for a color television display device
US4091347A (en) * 1976-03-17 1978-05-23 Rca Corporation Convergence apparatus for in-line beams
US4117433A (en) * 1977-04-25 1978-09-26 Rca Corporation Static convergence device including magnetic corrector apparatus
US4670726A (en) * 1984-12-20 1987-06-02 Hitachi Metals, Ltd. Convergence device for electron beams in color picture tube

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3725831A (en) * 1972-01-14 1973-04-03 Rca Corp Magnetic beam adjusting arrangements
US3808570A (en) * 1972-03-20 1974-04-30 Rca Corp Static convergence device for electron beams
US3898597A (en) * 1973-09-14 1975-08-05 Philips Corp Pairs of oppositely rotatable ring magnets for a color television display device
US4091347A (en) * 1976-03-17 1978-05-23 Rca Corporation Convergence apparatus for in-line beams
US4117433A (en) * 1977-04-25 1978-09-26 Rca Corporation Static convergence device including magnetic corrector apparatus
US4670726A (en) * 1984-12-20 1987-06-02 Hitachi Metals, Ltd. Convergence device for electron beams in color picture tube

Also Published As

Publication number Publication date
EP0843333A2 (en) 1998-05-20
KR19980042445A (en) 1998-08-17
JPH10144236A (en) 1998-05-29
SG74603A1 (en) 2000-08-22

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