WO1998024112A1 - Bloc de deviation et dispositif d'affichage - Google Patents

Bloc de deviation et dispositif d'affichage Download PDF

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Publication number
WO1998024112A1
WO1998024112A1 PCT/JP1997/004313 JP9704313W WO9824112A1 WO 1998024112 A1 WO1998024112 A1 WO 1998024112A1 JP 9704313 W JP9704313 W JP 9704313W WO 9824112 A1 WO9824112 A1 WO 9824112A1
Authority
WO
WIPO (PCT)
Prior art keywords
cathode ray
ray tube
horizontal
coil
deflection
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.)
Ceased
Application number
PCT/JP1997/004313
Other languages
English (en)
Japanese (ja)
Inventor
Nobutaka Okuyama
Kouji Fukuma
Souichi Sakurai
Yoshio Sato
Masao Obara
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
Hitachi Consumer Electronics Co Ltd
Original Assignee
Hitachi Ltd
Hitachi Media Electronics 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
Application filed by Hitachi Ltd, Hitachi Media Electronics Co Ltd filed Critical Hitachi Ltd
Publication of WO1998024112A1 publication Critical patent/WO1998024112A1/fr
Anticipated expiration legal-status Critical
Ceased 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
    • H01J29/762—Deflecting by magnetic fields only using saddle coils or printed windings
    • 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
    • H01J2229/7032—Conductor design and distribution
    • H01J2229/7033—Winding

Definitions

  • the present invention relates to a deflection yoke for deflecting an electron beam of a cathode ray tube, and more particularly to a deflection yoke capable of reducing raster distortion in a wide-angle deflection yoke and a display device using the same.
  • a desired image screen is obtained by deflecting an electron beam generated by an electron gun electromagnetically by a deflection yoke and projecting the electron beam on a phosphor screen in front of the cathode ray tube.
  • the deflection yoke of such a cathode ray tube generally uses a wobble deflection coil.
  • the present invention has been made in view of the related art as described above, and an object of the present invention is to provide an improved deflection yoke capable of reducing raster distortion without lowering horizontal deflection sensitivity, and By using such a deflection yoke, there is provided a display device capable of displaying a high quality screen with reduced raster distortion despite the enlargement of the display screen.
  • a deflection yoke according to the present invention for achieving the above object is mounted on a portion of a cathode ray tube close to an electron gun, and deflects an electron beam generated from the electron gun toward a phosphor screen.
  • a deflection yoke having at least a horizontal deflection coil and a vertical deflection coil, wherein the horizontal deflection coil is constituted by a pair of serpentine coils formed by winding conductors;
  • An angle of 48 ° to 58 ° with respect to a horizontal central axis on a plane substantially perpendicular to the tube axis of the cathode ray tube is formed on a part of the coil conductor forming the transition portion on the fluorescent screen side of the cathode ray tube.
  • a flange portion protruding outward and a curved portion inclined from the flange portion toward the electron gun side are formed. is there.
  • the display device further includes a cathode ray tube having an electron gun for generating an electron beam, a horizontal deflection coil for deflecting the electron beam from the electron gun toward a fluorescent display surface of the cathode ray tube, and A deflection yoke having a vertical deflection coil; a video circuit for supplying a video signal to the electron gun of the cathode ray tube; and a horizontal deflection coil and a vertical deflection coil of the deflection yoke.
  • a horizontal deflection circuit for supplying a high-level horizontal deflection voltage and a high-level deflection voltage, respectively, and a vertical deflection circuit, wherein the horizontal deflection coil of the deflection yoke is formed by a pair of claws formed by winding a conductor.
  • a flange portion protruding outward at a diagonal portion in an angle of 48 ° to 58 ° with respect to the axis, and further extending from the flange portion inclining toward the electron gun. And forming a curved portion to correct raster distortion on the fluorescent display surface of the cathode ray tube.
  • FIG. 1 is a front view showing a configuration of a horizontal deflection coil of a deflection yoke, which is a feature of a color cathode ray tube according to an embodiment of the present invention, and a partial sectional view of each part.
  • FIG. 2 is a side view including a partially broken surface of the entire configuration of a color cathode ray tube incorporating a deflection yoke having a horizontal deflection coil according to an embodiment of the present invention
  • FIG. 3 is a block diagram of a display device including a deflection yoke having a horizontal deflection coil.
  • FIG. 4 is an operation explanatory diagram showing a change in the horizontal deflection magnetic field by the horizontal deflection coil of the deflection yoke according to the embodiment of the present invention shown in FIG. 1
  • FIG. 5 is a diagram shown in FIG.
  • FIG. 6 is a schematic diagram illustrating a correction operation of raster distortion by a horizontal deflection coil of the deflection yoke according to the embodiment of the present invention.
  • FIG. 6 shows a deflection yoke used in another embodiment of the present invention. It is the front and top view which show the structure of the used horizontal deflection coil.
  • FIG. 2 is a side view showing a partially cutaway part of a color cathode ray tube device provided with a deflection yoke according to the present invention.
  • reference numeral 1 denotes a deflection yoke. ing.
  • the deflection yoke 1 includes a horizontal deflection coil 2, a main vertical deflection coil 3, a main core 4, a separator 5, a sub core 6, an auxiliary vertical deflection coil 7, and a terminal cover 8.
  • reference numeral 9 denotes an electron gun
  • reference numeral 10 denotes a static compatibility magnet
  • reference numeral 11 denotes a color cathode ray tube (cathode ray tube)
  • reference numeral 12 denotes a phosphor screen of a color cathode ray tube.
  • the deflection yoke 1 has a phosphor screen 12 on the front surface, and is provided with an electron gun 9 for generating an inline array of multiple electron beams at the rear end of the rear neck portion. It is attached to the neck of the cathode ray tube 11.
  • the main core 4 that constitutes the deflection unit 1 is made of a magnetic material, and the main core 4 made of this magnetic material is made up of the horizontal deflection coil 2 of the deflection yoke 1 and the main vertical deflection. It is arranged on the outer periphery of the coil 3. Further, an auxiliary vertical deflection coil 7 is wound around a sub-core 6 which is a U-shaped magnetic material which is vertically disposed opposite to each other, and is provided on the side of the deflection yoke 1 where the electron gun 9 is arranged. .
  • reference numeral 2a denotes a crossover portion of the coil conductor on the phosphor screen side
  • reference numeral 2e denotes a void portion
  • reference numeral 23 denotes a hollow cathode ray tube 11 as will be described in detail later. The tube axis direction is shown.
  • FIG. 3 is a block diagram showing a color cathode ray tube device provided with a deflection yoke according to the present invention and its peripheral circuits. That is, this display device is provided with a video circuit 30, a horizontal deflection circuit 31, a vertical deflection circuit 32, a high voltage circuit 33, and the like. Also, the video signal input terminal 2 7, the horizontal synchronizing signal input terminal 28 and the vertical synchronizing signal input terminal 29 receive the corresponding signals, so that the video circuit 30, the horizontal deflection circuit 31 and the vertical deflection circuit 32 and The high-voltage circuit 33 performs a predetermined operation.
  • the horizontal deflection circuit 31 supplies the horizontal deflection current Ih to the horizontal deflection coil 2 to generate a horizontal deflection magnetic field
  • the vertical deflection circuit 32 applies the vertical deflection voltage to the main vertical deflection coil 3 and the auxiliary vertical deflection coil 7.
  • the current IV is supplied to generate a vertical deflection magnetic field
  • the horizontal and vertical deflection magnetic fields are controlled by the video circuit 30 to deflect the electron beam generated from the electron gun 9 into the color cathode ray tube 11. .
  • FIG. 1 shows a more detailed structure of the horizontal deflection coil 2 used in the deflection yoke according to the present invention.
  • FIG. 1 (A) is a front view of the horizontal deflection coil 2
  • FIG. 1 (B) is a side view of the front surface 1 taken along a line BB of the front surface 1.
  • FIG. 1 (C) is a cross-sectional view taken along the line CC of the front view.
  • the end of the horizontal deflection coil 2 composed of a pair of serpentine coils wound around a winding form on the fluorescent screen side has left and right coil conductors 2. It has a fluorescent screen side connecting portion connecting c and 2c.
  • one of the crossing portions on the fluorescent screen side of the horizontal deflection coil 2 wound in a coil shape by using a winding form is substantially perpendicular to the tube axis of the color cathode ray tube 11.
  • a flange-like portion 2a protruding outward in the direction is formed, and each coil conductor is inclined and curved toward the electron gun 9 side from the flange-like portion 2a on the other fluorescent screen side transition portion 2b.
  • An extended curved portion 2b is formed.
  • the angle 0 formed between the horizontal central axis 24 extending in the horizontal direction on the plane perpendicular to the tube axis direction 23 of the empty cathode ray tube 1 1 (FIG. 2) is from 48 ° to 58.
  • a gap 2e surrounded by a conductor of the flange 2a is formed at a diagonal of the flange 2a forming an angle.
  • the curved portion 2b of the fluorescent screen side connecting portion which connects the left and right coil conductors 2c, 2c of the horizontal deflection coil 2, applies the pin 14a to the winding before starting to wind the horizontal deflection coil 2. It can be formed by protruding.
  • the gap 2e can be formed by protruding the pin 14b from the former during the winding of the horizontal deflection coil. Note that the opening shape of the cross section on the fluorescent screen side of the horizontal deflection coil 2 is circular as shown by a broken line 13 in the figure.
  • FIG. 4 is an operation explanatory diagram showing a change in the horizontal deflection magnetic field generated by the horizontal deflection coil 2 according to the present invention when horizontally deflected to the right of the phosphor screen.
  • a current loop 15c is added equivalently.
  • a magnetic field B (broken line 16c) in the tube axis direction of the power cathode ray tube 11 is generated via the above-described diagonal gap 2e. Since the magnetic field B is strongly generated at a position corresponding to the diagonal portion of the fluorescent screen 12 of the color cathode ray tube 11, the vertical direction of the electron beam deflected to the diagonal portion is vertically extended.
  • the component deflection force F acts.
  • the horizontal raster line 20a drooping sharply at the corner, which is the diagonal part of the color cathode ray tube 11, moves upward or downward as indicated by the arrow 21a. It is corrected to rise.
  • a horizontal raster 20b having pincushion distortion as shown by a broken line in the figure can be obtained.
  • the horizontal line raster 20b having the pincushion distortion with the curvature corrected at the corner portion in this manner is further adjusted by the operation of the curved portion 2b described in detail below to obtain a linear raster ( A dashed line 20 c) can be obtained. That is, the curvature (solid line 20a) at the corner of the horizontal line raster is corrected to form a linear raster (dash-dot line 20c). Can be.
  • a curved portion 2b is formed at a part of the cross section on the phosphor screen side of the horizontal deflection coil 2, a current loop 15b is added equivalently, and a reverse magnetic field 16b is generated. Due to the generated reverse magnetic field 16 b, the horizontal deflection magnetic field generated by the horizontal deflection coil 2 changes from a solid arrow 16 a to a broken arrow 16 b in the figure, that is, a strong pinkish shape. I do. As a result, as shown in FIG.
  • the horizontal line raster 20b (broken line) having the pincushion distortion is corrected in the direction shown by the arrow 21b, and thus, the raster distortion as shown in the figure is reduced. No horizontal line raster (dash-dot line 20c) can be obtained.
  • FIG. 6 is a front view (FIG. 6 (A)) and a plan view (FIG. 6 (B)) showing the form of the horizontal deflection coil 2 used in another embodiment of the present invention.
  • the thickness of the flange 2a is made thinner than the other part at the diagonal part 2 ° so that the outermost dimension L of the flange part 2a is the largest at the diagonal part 2f.
  • the location where the outermost dimension L of the diagonal part 2 mm is the largest is the same as that in the above embodiment with respect to the tube axis direction 23 (Fig. 6 ( ⁇ )) of the empty cathode ray tube.
  • each coil conductor is closer to the electron gun 9 than the diagonal portion 2 f.
  • a curved portion 2b is formed which is inclined and curved and extends.
  • a diagonal portion 2f of the flange portion 2a is formed substantially at right angles to a tube axis of the cathode ray tube, and has a thickness in the tube axis direction of the cathode ray tube at the diagonal portion. It is formed thinner than other parts.
  • the horizontal deflection sensitivity due to the formation of the flange portion 2a is hardly changed by the formation of the curved portion 2b, but can be improved, as in the above-described embodiment.
  • the raster distortion is reduced by changing the magnetic field generated from the vicinity of the transition portion on the phosphor screen side of the horizontal deflection coil at the diagonal portion.
  • the inductance of the horizontal deflection coil can be reduced to improve the horizontal deflection sensitivity, and by using such a deflection yoke, the raster distortion can be reduced despite the wide-angle deflection angle.
  • the deflection yoke according to the present invention can be used to deflect an electron beam for displaying an image while reducing raster distortion in a cathode ray tube used for a television receiver or a display device for monitoring a personal computer.
  • a cathode ray tube used for a television receiver or a display device for monitoring a personal computer.
  • it is suitable for obtaining a high image quality even if the electron beam is deflected at a wide deflection angle.

Landscapes

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

Abstract

L'invention concerne un bloc de déviation amélioré qui permet de réduire la distorsion de la luminosité en cas d'angle de vue élevé ainsi qu'un dispositif d'affichage permettant de créer un écran de haute qualité et utilisant ce bloc de déviation. S'agissant du bloc de déviation, la bobine de déviation horizontale (2) possède une paire de bobines en forme de selle obtenue par enroulement des conducteurs. Dans une partie du conducteur, on crée des bobines constituant la partie de transition du côté de la face fluorescente, et pourvues de parties en forme de collier (2a) saillant vers l'extérieur et des coudes (2b) et partant à l'oblique du côté d'un canon électronique (9) à partir des parties en forme de collier (2a). Ces bobines sont créés dans les parties en diagonale formant des angles υ, compris entre 48° et 58°, par rapport à l'axe horizontal (24) passant par un plan sensiblement perpendiculaire à l'axe d'un tube cathodique. L'invention permet de corriger la distorsion de la luminosité sans détériorer la sensibilité de la déviation horizontale, et ce, grâce au champ magnétique généré par la partie en forme de collier (2a) et par le coude (2b).
PCT/JP1997/004313 1996-11-27 1997-11-26 Bloc de deviation et dispositif d'affichage Ceased WO1998024112A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP8/315841 1996-11-27
JP31584196 1996-11-27

Publications (1)

Publication Number Publication Date
WO1998024112A1 true WO1998024112A1 (fr) 1998-06-04

Family

ID=18070232

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP1997/004313 Ceased WO1998024112A1 (fr) 1996-11-27 1997-11-26 Bloc de deviation et dispositif d'affichage

Country Status (1)

Country Link
WO (1) WO1998024112A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62180936A (ja) * 1978-01-18 1987-08-08 エヌ・ベ−・フイリツプス・フル−イランペンフアブリケン カラ−テレビジヨン表示装置
JPH02144832A (ja) * 1988-10-06 1990-06-04 Philips Gloeilampenfab:Nv 上下ラスタ誤差を減少させる表示管及び偏向ユニットの結合
JPH02158038A (ja) * 1988-10-27 1990-06-18 Philips Gloeilampenfab:Nv 表示管のサドル形偏向コイルおよびその製造方法
JPH02216738A (ja) * 1989-02-16 1990-08-29 Matsushita Electric Ind Co Ltd 偏向ヨーク

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62180936A (ja) * 1978-01-18 1987-08-08 エヌ・ベ−・フイリツプス・フル−イランペンフアブリケン カラ−テレビジヨン表示装置
JPH02144832A (ja) * 1988-10-06 1990-06-04 Philips Gloeilampenfab:Nv 上下ラスタ誤差を減少させる表示管及び偏向ユニットの結合
JPH02158038A (ja) * 1988-10-27 1990-06-18 Philips Gloeilampenfab:Nv 表示管のサドル形偏向コイルおよびその製造方法
JPH02216738A (ja) * 1989-02-16 1990-08-29 Matsushita Electric Ind Co Ltd 偏向ヨーク

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