EP0456224A2 - Farbkathodenstrahlröhrenvorrichtung - Google Patents

Farbkathodenstrahlröhrenvorrichtung Download PDF

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Publication number
EP0456224A2
EP0456224A2 EP91107505A EP91107505A EP0456224A2 EP 0456224 A2 EP0456224 A2 EP 0456224A2 EP 91107505 A EP91107505 A EP 91107505A EP 91107505 A EP91107505 A EP 91107505A EP 0456224 A2 EP0456224 A2 EP 0456224A2
Authority
EP
European Patent Office
Prior art keywords
electron
permanent magnet
cathode ray
ray tube
color cathode
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
Application number
EP91107505A
Other languages
English (en)
French (fr)
Other versions
EP0456224B1 (de
EP0456224A3 (en
Inventor
Masatsugu C/O Intellectual Property Div. Inoue
Kiyoshi C/O Intellectual Property Div. Tokita
Takeshi C/O Intellectual Property Div. Fujiwara
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
Toshiba 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 Toshiba Corp filed Critical Toshiba Corp
Publication of EP0456224A2 publication Critical patent/EP0456224A2/de
Publication of EP0456224A3 publication Critical patent/EP0456224A3/en
Application granted granted Critical
Publication of EP0456224B1 publication Critical patent/EP0456224B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • H01J29/56—Arrangements for controlling cross-section of ray or beam; Arrangements for correcting aberration of beam, e.g. due to lenses
    • H01J29/566—Arrangements for controlling cross-section of ray or beam; Arrangements for correcting aberration of beam, e.g. due to lenses for correcting aberration
    • 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
    • H01J29/707—Arrangements intimately associated with parts of the gun and co-operating with external magnetic excitation devices

Definitions

  • a color cathode ray tube apparatus of shadow mask type comprises a panel section having a generally rectangular face plate and a skirt extending from a lateral edge of the face plate, a funnel section connected to the panel section, and a neck section continuously formed with the funnel section.
  • the interior of the cathode ray tube is maintained in a vacuum state by the panel section, the funnel section and the neck section.
  • an electron gun assembly which generates three electron beams (R), (G) and (B).
  • R electron beams
  • G electron beams
  • B electron beams
  • a deflection device At the outer lateral side of the portion of the apparatus between the funnel section and the neck section is disposed a deflection device for generating magnetic fields which deflect electron beams vertically and horizontally.
  • a phosphor screen is formed on the inner face of the face plate of the panel.
  • a generally rectangular shadow mask is opposed to the face plate at a predetermined spacing.
  • the shadow mask is made of a thin metal plate and provided with a lot
  • the permanent magnet disc 70 embodied by the invention easily corrects spots of those three electron beams, and in addition, owing to its compact size, the permanent magnet ring 70 is inexpensive and promotes workability for implementing the mass production.
  • the preceding color cathode ray tube apparatus added with the auxiliary coil cited above fluctuates the deflection magnetic field by effect of deflection current, and thus, when compensating for the spot shape of those three electron beams by applying the added auxiliary coil, depending on the position of electron beams, correction effect may become too short or excessive.
  • Figs. 13 and 14 respectively designate modified examples of the permanent magnet 162 of the second embodiment.
  • those magnet poles on a pair of permanent magnet member 171a and 171b and another pair of permanent magnet members 181a and 181b are positioned apart from each other in the structure of those permanent magnets 172 and 182. Provision of these magnetic poles at discrete positions minimizes mutual interference of those magnetic poles to effectively promote magnetization.
  • the scope of the second embodiment does not solely specify the number of applicable permanent magnet to be only two pieces, but a minimum of three permanent magnet members may also be introduced as well.
  • a magnetic field control element consisting of a pair of magnetic members 41a and 41b is installed in the periphery of the side-beam permeating through holes at the bottom of the convergence cup 37 secured to the fourth grid 34.
  • the permanent magnet disc 28 is secured to the internal surface of the convergence cup 37, where the permanent magnet ring 28 generates eight-pole magnetic field which is symmetrical of both sides of the center axis 55 of the electron gun assembly 20.
  • the permanent magnet ring 28 substantially makes up a region allowing permeation of electron beams on the side of the electron gun assembly 20 of the deflection device, and yet, the permanent magnet disc 28 may be installed to a position much closer to the deflection device than the electron lens section of the electron gun assembly 20.
  • the color cathode ray tube apparatus embodied by the invention incorporates an electron gun which emits three electron beams aligned on a rank and a deflection device which generates deflected magnetic field deflecting those three electron beams emitted from the electron gun in the aligned direction and in the direction orthogonally intersecting the aligned direction.
  • the ring-shaped permanent magnet generating eight-pole magnetic field is disposed at a position on the side of the electron gun of the deflection device or at a position close to electrons on the side of the phosphorous screen of the main lens section of the electron gun assembly.
EP19910107505 1990-05-10 1991-05-08 Farbkathodenstrahlröhrenvorrichtung Expired - Lifetime EP0456224B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP118683/90 1990-05-10
JP2118683A JP3034906B2 (ja) 1990-05-10 1990-05-10 カラー受像管および偏向装置

Publications (3)

Publication Number Publication Date
EP0456224A2 true EP0456224A2 (de) 1991-11-13
EP0456224A3 EP0456224A3 (en) 1993-02-24
EP0456224B1 EP0456224B1 (de) 1996-03-27

Family

ID=14742615

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19910107505 Expired - Lifetime EP0456224B1 (de) 1990-05-10 1991-05-08 Farbkathodenstrahlröhrenvorrichtung

Country Status (3)

Country Link
EP (1) EP0456224B1 (de)
JP (1) JP3034906B2 (de)
DE (1) DE69118235T2 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996023316A1 (en) * 1995-01-24 1996-08-01 International Business Machines Corporation Raster demodulation apparatus and method
EP0892421A1 (de) * 1997-07-15 1999-01-20 Hitachi, Ltd. Farbkathodenstrahlröhre
WO2000025339A1 (en) * 1998-10-26 2000-05-04 Koninklijke Philips Electronics N.V. Picture display device comprising a deflection unit, and deflection unit for such a picture display device

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI771003B (zh) * 2020-06-17 2022-07-11 漢辰科技股份有限公司 混合磁鐵結構

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2866125A (en) * 1954-02-09 1958-12-23 Philips Corp Cathode-ray tube
DE2548117A1 (de) * 1974-10-30 1976-05-13 Videon Sa Schnelles einstellverfahren der statischen konvergenz von elektronenstrahlen in einer farbbildroehre mit dafuer geeigneten vorrichtungen
GB1534814A (en) * 1976-07-05 1978-12-06 Tdk Electronics Co Ltd Convergence control unit for television set
EP0053853A1 (de) * 1980-12-05 1982-06-16 Koninklijke Philips Electronics N.V. Ablenkeinheit für eine Einfarben-Kathodenstrahl-Anzeigeröhre und Einfarben-Kathodenstrahl-Anzeigeröhre mit einer auf ihr montierten Ablenkeinheit dieser Art
EP0059004A1 (de) * 1981-02-18 1982-09-01 Koninklijke Philips Electronics N.V. Bildwiedergaberöhre und mit solcher Röhre versehene Bildwiedergabevorrichtung
US4755714A (en) * 1986-02-13 1988-07-05 U.S. Philips Corp. Electromagnetic deflection unit for a television picture display tube
EP0348912A2 (de) * 1988-06-27 1990-01-03 Kabushiki Kaisha Toshiba Farbbildröhre

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2866125A (en) * 1954-02-09 1958-12-23 Philips Corp Cathode-ray tube
DE2548117A1 (de) * 1974-10-30 1976-05-13 Videon Sa Schnelles einstellverfahren der statischen konvergenz von elektronenstrahlen in einer farbbildroehre mit dafuer geeigneten vorrichtungen
GB1534814A (en) * 1976-07-05 1978-12-06 Tdk Electronics Co Ltd Convergence control unit for television set
EP0053853A1 (de) * 1980-12-05 1982-06-16 Koninklijke Philips Electronics N.V. Ablenkeinheit für eine Einfarben-Kathodenstrahl-Anzeigeröhre und Einfarben-Kathodenstrahl-Anzeigeröhre mit einer auf ihr montierten Ablenkeinheit dieser Art
EP0059004A1 (de) * 1981-02-18 1982-09-01 Koninklijke Philips Electronics N.V. Bildwiedergaberöhre und mit solcher Röhre versehene Bildwiedergabevorrichtung
US4755714A (en) * 1986-02-13 1988-07-05 U.S. Philips Corp. Electromagnetic deflection unit for a television picture display tube
EP0348912A2 (de) * 1988-06-27 1990-01-03 Kabushiki Kaisha Toshiba Farbbildröhre

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996023316A1 (en) * 1995-01-24 1996-08-01 International Business Machines Corporation Raster demodulation apparatus and method
US6268705B1 (en) 1995-01-24 2001-07-31 International Business Machines Corporation Raster demodulation apparatus and method
EP0892421A1 (de) * 1997-07-15 1999-01-20 Hitachi, Ltd. Farbkathodenstrahlröhre
US6194823B1 (en) 1997-07-15 2001-02-27 Hitachi, Ltd. Color cathode ray tube having adjustment magnet assembly at the neck portion of the tube
US6335589B2 (en) 1997-07-15 2002-01-01 Hitachi, Ltd. Color cathode ray tube having adjustment magnet assembly at neck portion
WO2000025339A1 (en) * 1998-10-26 2000-05-04 Koninklijke Philips Electronics N.V. Picture display device comprising a deflection unit, and deflection unit for such a picture display device

Also Published As

Publication number Publication date
DE69118235D1 (de) 1996-05-02
EP0456224B1 (de) 1996-03-27
DE69118235T2 (de) 1996-08-22
JP3034906B2 (ja) 2000-04-17
JPH0417238A (ja) 1992-01-22
EP0456224A3 (en) 1993-02-24

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