EP0399467B1 - Farbkathodenstrahlröhren-Einrichtung - Google Patents

Farbkathodenstrahlröhren-Einrichtung Download PDF

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Publication number
EP0399467B1
EP0399467B1 EP90109702A EP90109702A EP0399467B1 EP 0399467 B1 EP0399467 B1 EP 0399467B1 EP 90109702 A EP90109702 A EP 90109702A EP 90109702 A EP90109702 A EP 90109702A EP 0399467 B1 EP0399467 B1 EP 0399467B1
Authority
EP
European Patent Office
Prior art keywords
deflecting
section
magnetic field
horizontal
vertical
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 - Lifetime
Application number
EP90109702A
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English (en)
French (fr)
Other versions
EP0399467A1 (de
Inventor
Katsuei C/O Intellectual Property Div. Morohashi
Shigeo C/O Intellectual Property Div. Takenaka
Taketoshi C/O Intellectual Property Div. Shimoma
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
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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
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Publication of EP0399467A1 publication Critical patent/EP0399467A1/de
Application granted granted Critical
Publication of EP0399467B1 publication Critical patent/EP0399467B1/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
    • H01J29/70—Arrangements for deflecting ray or beam
    • H01J29/72—Arrangements for deflecting ray or beam along one straight line or along two perpendicular straight lines
    • H01J29/76—Deflecting by magnetic fields only
    • 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
    • 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
    • H01J2229/563—Aberrations by type
    • H01J2229/5637—Colour purity
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2229/00—Details of cathode ray tubes or electron beam tubes
    • H01J2229/96—Circuit elements other than coils, reactors or the like, associated with the tube
    • H01J2229/964—Circuit elements other than coils, reactors or the like, associated with the tube associated with the deflection system

Definitions

  • the present invention relates to a color cathode ray tube apparatus having a color cathode ray tube and a deflecting unit mounted outside the tube.
  • a color cathode ray tube generally comprises a panel, a funnel continuous to the panel, and a tube having a cylindrical neck connected to the funnel.
  • a shadow mask is arranged inside the panel, and a phosphor screen constituted by three color light emission layers for emitting red, green and blue beams is formed on the inner surface of the panel to oppose the shadow mask.
  • An electron gun assembly for emitting three electron beams is arranged inside the neck portion.
  • a deflecting unit is arranged outside the boundary between the corn and neck portion of the funnel.
  • a static convergence magnet and a purity magnet are arranged outside the neck.
  • an in-line electron gun assembly for emitting a pair of side beams and a center beam in a line on the same horizontal plane is generally employed.
  • a phosphor screen is constituted by phosphor stripe layers extending in the vertical direction.
  • a pincushion horizontal deflecting magnetic field which is a nonuniform magnetic field is generated to deflect electron beams in the horizontal direction
  • a barrel vertical deflecting magnetic field which is a nonuniform magnetic field is generated to deflect the electron beams in the vertical direction. Therefore, correction of dynamic convergence using an external circuit is not necessary.
  • the mounting positions of the deflecting device, the static convergence magnet, and the purity magnet must be adjusted.
  • An operator conventionally adjusts the mounting positions of the deflecting unit, the static convergence magnet and the purity magnet while watching the screen.
  • various types of methods of adjusting the deflecting unit i.e., rotation of the deflecting unit on the color picture tube, reciprocation of the deflecting unit in the axial direction of the tube to correctly radiate the three electron beams on the three color phosphor layers, and swinging of the deflecting unit on the phosphor side in vertical and horizontal directions to focus the three electron beams on a peripheral portion of the phosphor screen while the deflecting unit on the electron gun assembly side is fixed.
  • the positions of the static convergence magnet and the purity magnet are generally adjusted by rotating three pairs of magnets, i.e., a total of six annular magnets, and all of the adjusting operations are manually performed by visual check.
  • the adjusting operations must be repeated until an optimal adjustment state is obtained. Therefore, the adjustment requires skills and time-consuming operations.
  • the mounting positions of the deflecting unit, the static convergence magnet, and the purity magnet must be adjusted.
  • these adjusting operations there are many types of operations for particularly adjusting the deflecting unit on the color picture tube. That is, these operations include items for rotating the deflecting unit on the color picture tube, moving the unit in a direction of the tube axis and swinging the unit in the vertical and horizontal directions. Since an operator manually performs these adjusting operations while watching the screen, the adjustment requires skills and a time-consuming operation. In a large tube, in particular, since the adjusting operation cannot be performed by one operator, a pair of operators cooperate to adjust the deflecting unit or any special-purpose adjusting tool is required. Therefore, the adjustment is time-consuming and cannot be optimally performed.
  • Prior art documents GB-A-1 407 166 discloses an electromagnetic beam deflection yoke wherein correction of convergence distortions can be accomplished by means of two deflection coil units which are arranged side by side in the axial direction of a tube and are provided respectively with main and auxiliary deflection coils and in which the ratio and intensity of current flow in each of the auxiliary deflection coils of the respective deflection coil units are changed as desired.
  • a pincushion correction circuit which has heretofore been necessary can be eliminated. This simplifies the circuit construction and thus permits a reduction in the manufacturing cost.
  • the direction of current flow in each of the auxiliary deflection coils in the rear deflection coil unit is selected so that the magnetic field distribution of this rear deflection coil unit produces a barrel magnetic field and the direction of current flow in each of the auxiliary deflection coils of the front deflection coil unit is selected so that the magnetic field distribution of the deflection coil unit provides a pincushion magnetic field.
  • the present invention provides a color cathode ray tube apparatus as specified in the claim.
  • a deflecting unit arranged on the outer surface of the tube is constituted by a main deflecting section whose deflecting center is located on a phosphor screen side from an optimal deflecting center of the cathode ray tube and a sub deflecting section whose deflecting center is located on an electron gun assembly side from the optimal deflecting center.
  • Each of the main and sub deflecting sections has a horizontal deflecting coil for applying a horizontal deflecting magnetic field to a plurality of electron beams emitted from the electron gun assembly and a vertical deflecting coil for applying a vertical deflecting magnetic field to the plurality of electron beams.
  • the horizontal deflecting magnetic field generated by the sub deflecting section is asymmetrical about the vertical axis on the horizontal plane, and the vertical deflecting magnetic field generated from the sub deflecting section asymmetrical about the horizontal axis on the vertical plane.
  • the deflecting unit has a main deflecting section arranged on the phosphor screen side from the optimal deflecting center of the cathode ray tube and a sub deflecting section arranged on the electron gun assembly side from the optimal deflecting center.
  • a magnetic field generated by the main deflecting section is a pincushion magnetic field for deflecting magnetic field in a direction of array, and a magnetic field generated by the sub deflecting section is a barrel magnetic field.
  • a magnetic field, generated by the deflecting unit, for deflecting a plurality of electron beams in the direction of array is formed in a barrel shape shifted to the sub deflecting section side from the deflecting center of the deflecting unit.
  • a color cathode ray tube apparatus has a deflecting unit capable of freely adjusting a deflecting state of electron beams, thereby easily adjusting a deflecting unit.
  • FIG. 1 shows a part of a color cathode ray tube apparatus according to an embodiment of the present invention.
  • a color cathode ray tube apparatus 50 comprises a substantially rectangular faceplate 54, a panel section 52 having a skirt 51 extending from the peripheral portion of the faceplate, a funnel section 58 connected to the panel 52, and an envelope 61 having a neck section 60 continuous to the funnel section.
  • the interior of the cathode ray tube is kept in a vacuum state by the panel 52, the funnel 58, and the neck 60.
  • An electron gun assembly 62 for generating three electron beams B R , B G , and B B is housed in the neck section 60.
  • a deflecting unit 64 having a horizontal deflecting coil for generating a magnetic field to deflect the electron beams B R , B G , and B B in the horizontal direction and a vertical deflecting coil for generating a magnetic field to deflect the electron beams in a vertical direction is arranged on the outer surface of the funnel section 58 and the neck section 60.
  • the deflecting unit 64 has a main deflecting section 66 and a sub deflecting section 68.
  • Static convergence and purity magnets 70 and 72 for adjusting tracks of the electron beams B R , B G and B B are arranged on the outer surface of the neck section 60.
  • a phosphor screen 74 is formed on the inner surface of the faceplate 54 of the panel section 52.
  • a substantially rectangular shadow mask 76 is arranged to form a gap with the faceplate 54 and to face the phosphor screen 74 in the tube.
  • the shadow mask 76 is made of a thin metal plate and has a large number of apertures.
  • a mask frame 78 for supporting the shadow mask 76 is arranged around the shadow mask 76.
  • the mask frame 78 is supported on the panel 52 by a plurality of elastic support members (not shown).
  • Fig. 2 is an enlarged view of the parts of the funnel section 58 and the neck section 60.
  • the main deflecting section 66 of the deflecting unit 64 has a pair of saddle horizontal deflecting coils 80 and a pair of toroidal vertical deflecting coils 82 wound around a core 84.
  • the sub deflecting section 68 of the deflecting unit 64 has a pair of saddle horizontal deflecting coils 86 and a pair of toroidal vertical deflecting coils 88 wound around a core 90.
  • the sub deflecting section 68 also has a sub coil (not shown). Synchronous currents having different current values determined by the deflecting coils are supplied to the main and sub deflecting sections 66 and 68 of the deflecting unit 64, respectively. A current synchronized with these currents is supplied to the sub coil (not shown). For this reason, the coils are connected to a passive circuit having resistors or LCs as circuit elements.
  • Figs. 3A and 3B Examples of the passive circuit are shown in Figs. 3A and 3B. These passive circuits are simple and inexpensive.
  • the main deflecting section 66 is connected to a deflecting power source 94.
  • the sub deflecting section 68 and a variable resistor 92 connected in parallel with the main deflecting section 66 are connected in series with the deflecting power source 94. By adjusting the resistance of the variable resistor, the currents of the sub and main deflecting sections 68 and 66 are adjusted.
  • This passive circuit may be employed for a horizontal deflecting coil or a vertical deflecting coil.
  • a varactor 96 and a variable inductor 98 are added to the circuit in Fig. 3A.
  • variable resistor the varactor, and the variable inductor may be connected to the main deflecting section instead of the sub section.
  • elements may be variably connected in series or parallel with each other. Each of the circuit elements may be singly used.
  • an active element can be connected to the above circuit elements.
  • the deflecting unit 64 is arranged so that a deflecting center of the main deflecting section 66 is located on the phosphor screen side from an optimal deflecting center of a cathode ray tube and the deflecting center of the whole deflecting unit 64 is located on the electron gun assembly side from the optimal deflecting center of the cathode ray tube when the same deflecting currents are supplied to the main deflecting section 66 and the sub deflecting section 68.
  • the deflecting current Ib of the sub deflecting section 68 can be adjusted to fall within the following range: 0 ⁇ Ib ⁇ Ia thereby obtaining the same effect as in a conventional deflecting unit. That is, as shown in Fig. 4, when the deflecting center of the deflecting unit is located on an optimal deflecting position P2, an electron beam B passing through a shadow mask is landed on a phosphor Q2 located at a correct position on the phosphor screen.
  • the deflecting center of the deflecting unit is located at a position P1 located on the phosphor side from the optimal deflecting position P2, an electron beam B' passing through the shadow mask is landed on a phosphor Q1 located at an incorrect position on the phosphor screen.
  • the deflecting current Ia of the main deflecting section 66 and the deflecting current Ib of the sub deflecting section 68 are adjusted to set the deflecting unit to an optimal deflecting position. As shown in Fig.
  • Fig. 6 shows a pair of toroidal vertical deflecting coils 88 wound around the core 90 of the sub deflecting section 68.
  • values I1 and I2 of currents supplied to the vertical deflecting coils 88 are equal to each other, magnetic fields 104 and 106 as shown in Figs. 7A and 7B are generated.
  • the magnetic fields 104 and 106 are generated to be asymmetrical about the horizontal axis.
  • the three electron beams BR, B G , and B B receive a force from the magnetic fields 104 and 106 in directions of arrows 108 and 110.
  • the three electron beams B R , B G , and B B receive a repulsion force to be separated from each other.
  • the three electron beams B R , BG, and BB receive a force to cause them to come close to each other. Therefore, a convergence error can be corrected.
  • a toroidal vertical deflecting coil 88 and a sub coil 112 are wound around the core 90.
  • An arbitrary current synchronized with the currents of the vertical deflecting coils 88 is supplied to the sub coil 112, thereby correcting the above convergence error. That is, when the currents supplied to the pair of vertical deflecting coils 88 are equal to each other and a current I3 supplied to the sub coil 112 is set to 0, a vertical deflecting magnetic field asymmetrical about the vertical axis (Y-axis) is formed.
  • the horizontal deflecting coil 86 of the sub deflecting section 68 is synchronized with the vertical deflecting coil 88, and vertically unbalanced currents are supplied to these coils.
  • the horizontal deflecting magnetic field is synchronized with the vertical deflecting magnetic field to be dynamically changed, thereby correcting the convergence error.
  • the vertical deflecting magnetic field of the main deflecting magnetic field has a pincushion distribution
  • the vertical deflecting magnetic field of the sub deflecting magnetic field has a barrel distribution. Therefore, the convergence error and the image distortion can be excellently corrected.
  • the saddle horizontal deflecting coils of the main and sub deflecting sections are used, and the toroidal vertical deflecting coils are used. These coils are not limited to the above types, and various types of coils can be used.
  • a second sub deflecting section is added to the sub deflecting section of the deflecting unit of the apparatus of Fig. 1.
  • the second sub deflecting section 120 is shown in Fig. 12.
  • the second sub deflecting section 120 is arranged on the neck section 60 around the electron gun assembly 62.
  • the second sub deflecting section 120 deflects electron beams radiated from the electron gun assembly 62 in a direction perpendicular to the tube axis (Z-axis) before the electron beams are radiated into the main and sub deflecting sections 66 and 68 to correct a convergence error.
  • a color cathode ray tube apparatus having a deflecting unit capable of fine correction can be provided.
  • FIG. 1 shows a part of a color cathode ray tube apparatus which has the same arrangement as the above embodiment.
  • a color cathode ray tube apparatus 50 comprises a substantially rectangular faceplate 54, a panel section 52 having a skirt 51 extending from the peripheral portion of the faceplate, a funnel section 58 connected to the panel 52, and an envelope 61 having a neck section 60 continuous to the funnel section.
  • the interior of the cathode ray tube is kept in a vacuum state by the panel 52, the funnel 58, and the neck 60.
  • An electron gun assembly 62 for generating three electron beams B R , B G , and B B is housed in the neck section 60.
  • a deflecting unit 64 having the horizontal deflecting coil for generating a magnetic field to deflect the electron beams B R , B G , and B B in the horizontal direction and a vertical deflecting coil for generating a magnetic field to deflect the electron beams in a vertical direction is arranged on the outer surface of the funnel section 58 and the neck section 60.
  • the deflecting unit 64 has a main deflecting section 66 and a sub deflecting section 68.
  • Static convergence and purity magnets 70 and 72 for adjusting tracks of the electron beams B R , B G and B B are arranged on the outer surface of the neck section 60.
  • a phosphor screen 74 is formed on the inner surface of the faceplate 54 of the panel section 52.
  • a substantially rectangular shadow mask 76 is arranged to form a gap with the faceplate 54 and to face the phosphor screen 74 in the tube.
  • the shadow mask 76 is made of a thin metal plate and has a large number of apertures.
  • a mask frame 78 for supporting the shadow mask 76 is arranged around the shadow mask 76.
  • the mask frame 78 is supported on the panel 52 by a plurality of elastic support members (not shown).
  • Fig. 2 is an enlarged view of parts of the funnel section 58 and the neck section 60.
  • the main deflecting section 66 of the deflecting unit 64 has a pair of saddle horizontal deflecting coils 80 and a pair of toroidal vertical deflecting coils 82 wound around a core 84.
  • the sub deflecting section 68 of the deflecting unit 64 has a pair of saddle horizontal deflecting coils 86 and a pair of toroidal vertical deflecting coils 88 wound around a core 90.
  • the sub deflecting section 68 also has a sub coil (not shown). Synchronous currents having different current values determined by the deflecting coils are supplied to the main and sub deflecting sections 66 and 68 of the deflecting unit 64, respectively. A current synchronized with these currents is supplied to the sub coil (not shown). For this reason, the coils are connected to a passive circuit having resistors or LCs as circuit elements. Thus, this circuit is the same circuit as in the above embodiment.
  • the horizontal deflecting coil 80 of the main deflecting section 66 generates a pincushion horizontal deflecting magnetic field
  • the vertical deflecting coil 82 generates a barrel vertical deflecting magnetic field
  • the horizontal and vertical deflecting coil 86 and 88 generate barrel horizontal and vertical deflecting magnetic fields, respectively.
  • the horizontal deflecting magnetic field of the whole deflecting unit has a pincushion distribution as a whole, and the horizontal deflecting magnetic field has a barrel magnetic distribution on the sub deflecting section side from the deflecting center of the whole deflecting unit.
  • the deflecting unit 64 is arranged so that a deflecting center of the main deflecting section 66 is located on the phosphor screen side from an optimal deflecting center of a cathode ray tube and the deflecting center of the whole deflecting unit 64 is located on the electron gun assembly side from the optimal deflecting center of the cathode ray tube when the same deflecting currents are supplied to the main deflecting section 66 and the sub deflecting section 68.
  • the deflecting current Ib of the sub deflecting section 68 can be adjusted to fall within the following range: 0 ⁇ Ib ⁇ Ia thereby obtaining the same effect as in a conventional deflecting unit. That is, as shown in Fig. 4, when the deflecting center of the deflecting unit is located on an optimal deflecting position P2, an electron beam B passing through a shadow mask is landed on a phosphor Q2 located at a correct position on the phosphor screen.
  • the deflecting center of the deflecting unit is located at a position P1 located on the phosphor side from the optimal deflecting position P2, an electron beam B' passing through the shadow mask is landed on a phosphor Q1 located at an incorrect position on the phosphor screen.
  • the deflecting current Ia of the main deflecting section 66 and the deflecting current Ib of the sub deflecting section 68 are adjusted to set the deflecting unit to an optimal deflecting position. As shown in Fig.
  • the horizontal deflecting magnetic field has a barrel distribution shifted to the sub deflecting section 68 side from the deflecting center of the whole deflecting unit. Therefore, even if the three electron beams are radiated into the deflecting magnetic field while being deviated from the tube axis in the horizontal direction, excellent convergence characteristics can be obtained without a convergence error at the end of the horizontal axis in the horizontal direction.
  • the horizontal deflecting magnetic field has a pincushion distribution as a whole, and the horizontal deflecting magnetic field has a barrel distribution shifted to the sub deflecting section 68 side from the deflecting center of the whole deflecting unit 64.
  • the horizontal deflecting magnetic field has a barrel distribution shifted to the sub deflecting section 68 side from the deflecting center of the whole deflecting unit 64.
  • a deflecting unit mounted outside the envelope of the color picture tube is constituted by a main deflecting section whose deflecting center is located on the phosphor screen side from an optimal deflecting center of the color picture tube and a sub deflecting section whose deflecting center is located on the electron gun assembly side from the optimal deflecting center.
  • Horizontal and vertical coils for forming horizontal and vertical deflecting magnetic fields are arranged on the main deflecting section, and horizontal and vertical deflecting coils for forming horizontal and vertical magnetic fields and a sub coil are arranged on the sub deflecting section.
  • the deflecting center can be electrically reciprocated in a direction of the tube axis.
  • the horizontal deflecting magnetic field of the sub deflecting section is horizontally asymmetrical about the vertical axis and the vertical deflecting magnetic field is vertically asymmetrical about the horizontal axis
  • various type of convergence errors and image distortion can be electrically corrected without swinging adjustment of the deflecting unit.
  • the deflecting unit of the color picture tube can be correctly and rapidly adjusted, and the color picture tube having excellent screen quality can be provided.
  • a magnetic field for deflecting a plurality of beams in a direction of array of the beams by the main deflecting section has a pincushion distribution
  • a magnetic field for deflecting the plurality of beams in the same direction has a barrel distribution.
  • the deflecting center can be reciprocated in a direction of the tube axis by adjusting deflecting currents supplied to the main and sub deflecting sections.
  • chromatic purity of the peripheral portion of the screen conventionally adjusted by moving the deflecting unit in the direction of the tube axis can also be electrically adjusted.
  • the magnetic field for deflecting the plurality of beams in the direction of array of the beams by the barrel deflecting magnetic field generated by the sub deflecting unit has a barrel distribution shifted to the sub deflecting unit side from the deflecting center of the whole deflecting unit. Even if a plurality of in-line beams are radiated into the deflecting magnetic field while being deviated from the tube axis in a direction of their array, a convergence error can be eliminated.

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  • Video Image Reproduction Devices For Color Tv Systems (AREA)

Claims (1)

  1. Farbkathodenstrahlröhrengerät mit:
    einem Vakuumkolben (61) mit einem Frontplattenabschnitt (52), einem Trichterabschnitt (58) und einem Halsabschnitt (60), wobei der Frontplattenabschnitt (52) eine Achse und einen Schirmträger (54) hat, dessen Vorderansichtsgesalt im wesentlichen rechteckförmig ist und der eine Innenfläche aufweist, und mit einem Rand (51), der sich von einer Umfangskante des Schirmträgers (54) erstreckt, wobei der Halsabschnitt (60) eine im wesentlichen zylindrische Gestalt hat und der Trichterabschnitt (58) kontinuierlich mit dem Halsabschnitt (60) ist,
    einem Leuchtstoffschirm (74), der auf der Innenfläche des Schirmträgers (54) gebildet ist,
    einer Schattenmaske (76), die in dem Frontplattenabschnitt (52) angeordnet ist, um den Leuchtstoffschirm (74) auf dem Schirmträger (54) gegenüberzuliegen,
    einer In-Linien-Elektronenkanonenanordnung (62) mit einem Elektronenstrahlformabschnitt zum Erzeugen, Steuern und Beschleunigen von drei Elektronenstrahlen einschließlich eines Mittenelektronenstrahles und zwei Seitenelektronenstrahlen, und einem Hauptelektronenlinsenabschnitt zum Konvergieren und Fokussieren der drei Elektronenstrahlen,
    einer Ablenkeinheit (64) zum Ablenken der von der Elektronenkanonenanordnung (62) emittierten Elektronenstrahlen in vertikalen und horizontalen Richtungen, wobei die Ablenkeinheit (64) einen Hauptablenkabschnitt (66) mit einem Hauptablenkzentrum und wenigstens einen Unterablenkabschnitt (68) mit einem Unterablenkzentrum, das in einer von der Lage des Hauptablenkzentrums verschiedenen Lage gelegen ist, aufweist, wobei der Hauptablenkabschnitt (66) eine Horizontalablenkspule (80) zum Erzeugen eines Horizontalablenkmagnetfeldes zum Ablenken der mehreren Strahlen in der Horizontalrichtung und eine Vertikalablenkspule (82) zum Erzeugen eines Vertikalablenkmagnetfeldes zum Ablenklen der mehreren Strahlen in der Vertikalrichtung aufweist, und wobei der wenigstens eine Unterablenkabschnitt (68) ein Paar von Horizontalablenkspulen (86) zum Erzeugen eines Horizontalablenkmagnetfeldes zum Ablenken der mehreren Strahlen in der Horizontalrichtung und ein Paar von Vertikalablenkspulen (88) zum Erzeugen eines Vertikalablenkmagnetfeldes zum Ablenken der mehreren Strahlen in der Vertikalrichtung aufweist, und
    Einstelleinrichtungen (92) zum Einstellen der zu den Vertikalablenkspulen (88) des wenigstens einen Unterablenkabschnittes (68) gespeisten Ströme,
       dadurch gekennzeichnet, daß
       die Einstelleinrichtungen derart sind, daß verschiedene Ströme (I1, I2) zu den Spulen des wenigstens einen Unterablenkabschnittes gespeist werden können, so daß ein Magnetfeld (104, 106) erzeugt wird, das asymmetrisch um eine Horizontalachse ist, so daß in einem oberen Bereich über der Horizontalachse die drei Elektronenstrahlen (BR, BG, BB) eine Abstoßungskraft empfangen, um voneinander getrennt zu werden und in einem unteren Bereich unterhalb der Horizontalachse die drei Elektronenstrahlen (BR, BG, BB) eine Kraft empfangen, um sie eng zueinander zu bringen.
EP90109702A 1989-05-26 1990-05-22 Farbkathodenstrahlröhren-Einrichtung Expired - Lifetime EP0399467B1 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP133778/89 1989-05-26
JP13377889 1989-05-26
JP13824589 1989-05-31
JP138245/89 1989-05-31

Publications (2)

Publication Number Publication Date
EP0399467A1 EP0399467A1 (de) 1990-11-28
EP0399467B1 true EP0399467B1 (de) 1997-07-23

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Application Number Title Priority Date Filing Date
EP90109702A Expired - Lifetime EP0399467B1 (de) 1989-05-26 1990-05-22 Farbkathodenstrahlröhren-Einrichtung

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EP (1) EP0399467B1 (de)
JP (1) JP3034896B2 (de)
KR (1) KR920010661B1 (de)
DE (1) DE69031095T2 (de)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1231625A4 (de) * 1998-11-10 2006-08-23 Matsushita Electric Ind Co Ltd Ablenkjoch um eine mit diesem ablenkjoch versehenfarbbildröhre
KR101985783B1 (ko) * 2017-02-02 2019-06-04 한국원자력연구원 소프트웨어 무고장 보장 방법

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3849749A (en) * 1972-02-16 1974-11-19 Matsushita Electric Ind Co Ltd Deflection coils producing pincushion and barrel deflection fields
NL8300032A (nl) * 1983-01-06 1984-08-01 Philips Nv Inrichting voor het weergeven van televisiebeelden en afbuigeenheid daarvoor.
NL8600355A (nl) * 1986-02-13 1987-09-01 Philips Nv Inrichting voor het weergeven van televisiebeelden en afbuigeenheid daarvoor.

Also Published As

Publication number Publication date
JPH0381936A (ja) 1991-04-08
DE69031095D1 (de) 1997-09-04
EP0399467A1 (de) 1990-11-28
KR900019116A (ko) 1990-12-24
JP3034896B2 (ja) 2000-04-17
DE69031095T2 (de) 1998-02-19
KR920010661B1 (ko) 1992-12-12

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