EP1378927A1 - Tube d'affichage couleur et système de déviation presentant des propriétés d'imagerie ameliorées - Google Patents

Tube d'affichage couleur et système de déviation presentant des propriétés d'imagerie ameliorées Download PDF

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Publication number
EP1378927A1
EP1378927A1 EP02014858A EP02014858A EP1378927A1 EP 1378927 A1 EP1378927 A1 EP 1378927A1 EP 02014858 A EP02014858 A EP 02014858A EP 02014858 A EP02014858 A EP 02014858A EP 1378927 A1 EP1378927 A1 EP 1378927A1
Authority
EP
European Patent Office
Prior art keywords
picture tube
color picture
plane
magnets
deflection system
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Withdrawn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
EP02014858A
Other languages
German (de)
English (en)
Inventor
Andreas Dr. Ehrhardt
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.)
PSI Esslingen GmbH
Original Assignee
Matsushita Electronics Europe GmbH
Matsushita Display Devices Germany GmbH
MT Picture Display Germany GmbH
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 Matsushita Electronics Europe GmbH, Matsushita Display Devices Germany GmbH, MT Picture Display Germany GmbH filed Critical Matsushita Electronics Europe GmbH
Priority to EP02014858A priority Critical patent/EP1378927A1/fr
Priority to US10/453,463 priority patent/US20040004426A1/en
Priority to CZ20031834A priority patent/CZ20031834A3/cs
Publication of EP1378927A1 publication Critical patent/EP1378927A1/fr
Withdrawn legal-status Critical Current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
    • H01J29/70—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

Definitions

  • the invention relates generally to a color picture tube and in particular to color picture tubes. which have an improved deflection unit for lower aberrations.
  • Electron beams are deflected in a color picture tube by magnetic ones Fields of horizontal and vertical deflection coils of a funnel-shaped Deflection unit are generated.
  • the deflection unit which is mounted on a color picture tube consists essentially of two pairs of coils and a ferrite core.
  • a first one Coil pair creates a magnetic field that that of electron beam generation systems generated electron beams in the horizontal direction (X direction) deflects while the further pair of coils a vertical deflection (Y direction) causes.
  • the ferrite core encloses both coil pairs and serves the Magnetic flux feedback.
  • the deflection unit can use convergence magnets and have soft magnetic field formers. Such a deflection unit creates a self-converging image on the screen of the color picture tube without north-south grid distortion.
  • Modern color picture tubes contain electron beam generation systems in a so-called In-line arrangement in which the electron gun systems for the different color components are arranged in one plane.
  • the axes of the electron beams generated in such systems are coplanar and converge on the screen.
  • the color picture tube and deflection system of the present invention relate to one Improvement of the east-west inner cushion geometry distortion.
  • an east-west distortion is caused by modulation of the horizontal deflection current reduced or compensated.
  • Fig. 1 is an east-west inner cushion distortion reproduced after a conventional modulation of the horizontal Deflection current remains. With such a correction, an east-west distortion becomes fixed the outer vertical lines. However, an east-west inner cushion remains the inner vertical lines.
  • This remaining east-west inner pillow is conventionally used as needed Corrected with the help of an additional current modulation circuit which is incorporated in a deflection circuit is integrated.
  • the disadvantage of this conventional solution is the high one Additional effort and the additional costs required by such a circuit become. In other cases, such an additional circuit is dispensed with and thus put up with this east-west inner cushion distortion.
  • the object of the invention is therefore to provide a color picture tube and a deflection unit Specify color picture tubes, the East-West inner cushion distortion in a simple and inexpensive manner remedy.
  • the deflection unit on the outside of the color picture tube or the deflection unit in one first plane perpendicular to the direction of the electron beam convergence magnets arranged and in a second plane perpendicular to the direction of the electron beams, that differs from the first level become geometry magnets arranged.
  • the convergence magnets and the geometry magnets arranged in the deflection system of a color picture tube can be a simple structure and simple manufacture of the color picture tube according to the invention can be achieved.
  • a total of four Convergence magnets and / or geometry magnets symmetrical in the first or second level arranged. In this way, a correction can be made in a simple manner reach each quadrant of the image to be displayed on the fluorescent screen.
  • the The plane in which the geometry magnets are arranged is closer to the fluorescent screen than the plane in which the convergence magnets are arranged. This allows the Geometry magnets in a simple manner at the end of the funnel-shaped lampshade Attach the deflection system, for example in the area of the coil end windings.
  • a particularly advantageous influencing of the field by the convergence magnets is achieved if this is closer to the vertical axis of the color picture tube than to horizontal axis are arranged.
  • a particularly good correction is achieved when the convergence magnets approximately at an angle of 60 ° to the common plane in which the electron beams run, are arranged and the geometry magnets at an angle of in about 30 ° to the common plane of the electron beams. That way a particularly efficient correction of the geometry distortion with little effort to reach.
  • the Color picture tube is provided on the inside of the screen surface 2 with a luminescent layer and has an electron beam generating system disposed in the neck of the color picture tube 3 on. It is the electron beam generating system 3 is an in-line electron beam generation system. Under an in-line electron beam generation system one understands an electron beam generation system, preferably three running in a common plane 3a Electron beams generated, which are directed to the fluorescent screen 2.
  • a deflection system is mounted on the outside of the glass body of the color picture tube.
  • the distraction system comprises a horizontal deflection coil pair 4, a vertical deflection coil pair 5, and a ferrite core 6 enclosing both deflection coils 4, 5.
  • Such a deflection system with a substantially funnel-shaped structure causes a distraction of the electron beams generated by the electron beam generating system 3 in X direction and Y direction.
  • the deflection unit additionally includes magnets and, if necessary soft magnetic field formers, so that on the fluorescent screen 2 self-converging image without a north-south raster distortion.
  • Fig. 3 shows a schematic view of a first level of the invention Deflection system in the direction of the Z axis of the color picture tube.
  • the vertical deflection coils are with the reference number 5, the horizontal deflection coils with the reference number 4 provided.
  • four are arranged symmetrically in this view
  • Convergence magnets 8 shown. All four are preferably convergence magnets 8 arranged approximately in the direction of the screen corners. Here are the convergence magnets 8 are preferably closer to the vertical (Y-) than to the horizontal (X-) axis of the color picture tube.
  • All four convergence magnets 8 are preferably at an angle ⁇ of approximately 60 ° to the in-line level 3a.
  • the additional convergence magnets 8 within an angular range of 45 ° to 70 ° for the angle ⁇ , preferably within an angular range between 50 ° and 60 °.
  • These convergence magnets 8 generate a local magnetic field which, due to its location and its dimensions and the relative positioning of the three electron beams relative to one another in this area, causes the electron beams to be deflected to different extents. , As a result, there is mainly a shift from red and green to the left relative to blue on the right side of the screen in the corners. Accordingly, there is a shift from blue and green to the right relative to red on the left side. There is also a change in the geometry of the horizontal and vertical lines on the screen. Such a convergence and geometry change brought about by the convergence magnets 8 allows the use of additional geometry magnets to correct these aberrations, which consequently leads to an improvement in the east-west inner cushion distortion.
  • the east-west cushion distortion of the outer vertical lines shown in FIG. 1 is increased by the convergence and geometry magnets with unchanged modulation of the horizontal deflection current.
  • the resulting distortion is shown in Fig. 4.
  • the solid lines in FIG. 4 indicate the east-west pincushion distortion that occurs with conventional modulation of the horizontal deflection current (according to FIG. 1) and the additional use of geometry magnets.
  • the outer vertical lines are shown in dotted lines without the use of the additional geometry magnets (cf. FIG. 1).
  • FIG. 6 shows a schematic View of a second level of the deflection system according to the invention in the direction of Z axis of the color picture tube.
  • the horizontal winding heads of the deflection system are included 11, the vertical winding heads with the reference number 12.
  • the geometry magnets 10 are preferably closer to the horizontal axis of the color picture tube as arranged on the vertical axis.
  • all four geometry magnets 10 are under one Angle ⁇ of approximately 30 ° to the in-line plane 3a.
  • the geometry magnets 10 within an angular range from 10 ° to 45 ° for the angle ⁇ , preferably within an angular range between 20 ° and 40 °.
  • the plane in which the geometry magnets 10 are arranged is preferably located closer to the fluorescent screen than the plane in which the convergence magnets 8 are arranged are.
  • the inventive positioning of the convergence magnets 8 causes the three electron beams running horizontally next to each other through the of each a converging magnet 8 generated magnetic field deflected to different degrees become.
  • the convergence magnets 8 are preferred in the Z direction of the color picture tube in one middle level in relation to the deflection system. Such an arrangement is reproduced in Fig. 7.
  • the correction magnets 8 are preferably on the Horizontal tracks 4 of the existing of horizontal tracks 4 and 5 vertical tracks Deflection system provided.
  • the additional geometry magnets 10 are preferably in the front area of the deflection system, for example arranged in the area of the large coil winding heads.
  • the invention thus relates to a color picture tube and a deflection system for a color picture tube with a rectangular fluorescent screen and an in-line electron beam generation system.
  • An in-line electron beam generation system produces several electron beams extending essentially in a common plane, the are directed towards the fluorescent screen.
  • For an east-west interior cushion distortion to correct, are on the color picture tube or in the deflection system of a color picture tube in a first level convergence magnets and in a second, different ones Level geometry magnets arranged.
  • the levels of convergence and Geometry magnets are perpendicular to the direction of the electron beams aligned.
  • the present invention thus enables a color picture tube using a conventional one East-west inner cushion distortion without a circuit for additional Modulation of the horizontal deflection current can be corrected and that despite improved Imaging properties can be produced cheaply.

Landscapes

  • Video Image Reproduction Devices For Color Tv Systems (AREA)
EP02014858A 2002-07-04 2002-07-04 Tube d'affichage couleur et système de déviation presentant des propriétés d'imagerie ameliorées Withdrawn EP1378927A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP02014858A EP1378927A1 (fr) 2002-07-04 2002-07-04 Tube d'affichage couleur et système de déviation presentant des propriétés d'imagerie ameliorées
US10/453,463 US20040004426A1 (en) 2002-07-04 2003-06-03 Colour picture tube and deflection system with improved imaging properties
CZ20031834A CZ20031834A3 (cs) 2002-07-04 2003-06-30 Barevná obrazovka a vychylovací systém se zlepšenými zobrazovacími vlastnostmi

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP02014858A EP1378927A1 (fr) 2002-07-04 2002-07-04 Tube d'affichage couleur et système de déviation presentant des propriétés d'imagerie ameliorées

Publications (1)

Publication Number Publication Date
EP1378927A1 true EP1378927A1 (fr) 2004-01-07

Family

ID=29719721

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02014858A Withdrawn EP1378927A1 (fr) 2002-07-04 2002-07-04 Tube d'affichage couleur et système de déviation presentant des propriétés d'imagerie ameliorées

Country Status (3)

Country Link
US (1) US20040004426A1 (fr)
EP (1) EP1378927A1 (fr)
CZ (1) CZ20031834A3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1548793A2 (fr) * 2003-12-25 2005-06-29 Matsushita Toshiba Picture Display Co., Ltd. Tube image couleur

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109602373B (zh) * 2018-12-06 2020-08-14 浙江思密达智能装备有限公司 泡沫检测报警机构

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3857057A (en) * 1971-12-22 1974-12-24 Philips Corp Colour television display apparatus provided with a picture display tube with electron beams generated in one plane
JPS5475219A (en) * 1977-11-29 1979-06-15 Toshiba Corp Convergence corrector
US4823046A (en) * 1986-07-10 1989-04-18 U.S. Philips Corp. Color picture tube with astigmatism correction means
EP0612095A1 (fr) * 1993-02-18 1994-08-24 THOMSON TUBES & DISPLAYS S.A. Bobine de déviation avec shunt en forme de fourche
EP0613168A1 (fr) * 1993-02-18 1994-08-31 THOMSON TUBES & DISPLAYS S.A. Bobine de déviation avec une paire d'aimants au voisinage de son petit axe
US20020030431A1 (en) * 2000-09-12 2002-03-14 Baran Anthony Stanley Apparatus for correcting static electron beam landing error

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4433268A (en) * 1980-08-19 1984-02-21 Tokyo Shibaura Denki Kabushiki Kaisha Deflection yoke for a color cathode ray tube
NL8006628A (nl) * 1980-12-05 1982-07-01 Philips Nv Kathodestraalbuis - afbuigeenheid combinatie met hoog oplossend vermogen.
JPH04370629A (ja) * 1991-06-19 1992-12-24 Toshiba Corp 偏向ヨーク装置
KR20030094646A (ko) * 2002-06-07 2003-12-18 삼성전기주식회사 중간부 핀왜 보정 기능을 갖는 편향 요크

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3857057A (en) * 1971-12-22 1974-12-24 Philips Corp Colour television display apparatus provided with a picture display tube with electron beams generated in one plane
JPS5475219A (en) * 1977-11-29 1979-06-15 Toshiba Corp Convergence corrector
US4823046A (en) * 1986-07-10 1989-04-18 U.S. Philips Corp. Color picture tube with astigmatism correction means
EP0612095A1 (fr) * 1993-02-18 1994-08-24 THOMSON TUBES & DISPLAYS S.A. Bobine de déviation avec shunt en forme de fourche
EP0613168A1 (fr) * 1993-02-18 1994-08-31 THOMSON TUBES & DISPLAYS S.A. Bobine de déviation avec une paire d'aimants au voisinage de son petit axe
US20020030431A1 (en) * 2000-09-12 2002-03-14 Baran Anthony Stanley Apparatus for correcting static electron beam landing error

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 003, no. 096 (E - 130) 15 August 1979 (1979-08-15) *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1548793A2 (fr) * 2003-12-25 2005-06-29 Matsushita Toshiba Picture Display Co., Ltd. Tube image couleur
EP1548793A3 (fr) * 2003-12-25 2005-07-06 Matsushita Toshiba Picture Display Co., Ltd. Tube image couleur

Also Published As

Publication number Publication date
US20040004426A1 (en) 2004-01-08
CZ20031834A3 (cs) 2004-02-18

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