CN1315053A - Color display device having quadrupole convergence coils - Google Patents

Color display device having quadrupole convergence coils Download PDF

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Publication number
CN1315053A
CN1315053A CN00801165A CN00801165A CN1315053A CN 1315053 A CN1315053 A CN 1315053A CN 00801165 A CN00801165 A CN 00801165A CN 00801165 A CN00801165 A CN 00801165A CN 1315053 A CN1315053 A CN 1315053A
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CN
China
Prior art keywords
coil
unit
display device
electron
winding
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.)
Pending
Application number
CN00801165A
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Chinese (zh)
Inventor
A·A·S·斯卢伊特尔曼
W·H·C·特夫斯
T·G·斯潘杰尔
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.)
Koninklijke Philips NV
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Koninklijke Philips Electronics NV
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
Priority claimed from US09/338,049 external-priority patent/US6411027B1/en
Application filed by Koninklijke Philips Electronics NV filed Critical Koninklijke Philips Electronics NV
Publication of CN1315053A publication Critical patent/CN1315053A/en
Pending legal-status Critical Current

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    • 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
    • H01J29/48—Electron guns
    • H01J29/51—Arrangements for controlling convergence of a plurality of beams by means of electric field 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
    • H01J29/701—Systems for correcting deviation or convergence of a plurality of beams by means of magnetic fields at least
    • H01J29/702—Convergence correction arrangements therefor
    • H01J29/705—Dynamic convergence systems
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
    • H01J9/236—Manufacture of magnetic deflecting devices for cathode-ray tubes

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Video Image Reproduction Devices For Color Tv Systems (AREA)

Abstract

The invention relates to a color display device comprising an in-line electron gun (5) for generating three electron beams (6,7,8), and a convergence unit (14') to dynamically influence the convergence of the electron beams and deflecting means (51) for deflecting the electron beams (6,7,8). The convergence unit (14') comprises a ring-shaped element (21'), said ring-shaped element comprising two parts, a first part (60) being positioned closer to the in-line gun (5) than a second part (68), and the first and/or the second part having four coils (22') for generating a magnetic quadrupole field.

Description

Colour display device with four utmost point convergence coils
The present invention relates to a kind of colour display device, this colour display device comprises and is used to produce the I-shaped electron gun of three-beam electron-beam and is used to make the unit of the electron beam deflecting by color selecting pole.
Known such display unit.
Current target is to make the outer surface of colored display window more flat, so that the beholder thinks that shown image image plane is such on the display window., the radius of curvature of increase outer surface will cause a large amount of problems to occur.The radius of curvature of display window inner surface and color selecting pole also should increase, and because color selecting pole becomes more flat, the mechanical strength of color selecting pole reduces, and has therefore increased the possibility of vault and vibration.Another solution to this problem is to make the inner surface of display window more than outer surface bending.Thus, can use color selecting pole with relative small curvature radius.As a result, can reduce vault and vibration problem, other problem occur but replace.The thickness at display window edge is much thicker than the thickness at center.As a result, the weight of display window increases, and the brightness of image reduces towards the edge basically.
EP0421523 disclose have I-shaped electron gun, the color cathode ray tube of pincushion correction yoke and eyebrow (eyebrow) effect electron optics distortion calibration device, described means for correcting comprises two pairs of coils, the coil in the bundle plane on every pair of each the outer beams side that has at neck.Coil is to separating and synchronously driven by zigzag electric current and raster with bowknot shape envelope along the Z between centers between electron gun and yoke, with the dynamic asymmetric eyebrow effect that shows as the colour purity defective on the calibration grating.
WO99/34392 has described the colour display device that comprises color cathode ray tube, and this cathode ray tube comprises the I-shaped electron gun that produces three-beam electron-beam; Color selecting pole; Deflection is positioned at the arrangement for deflecting of the electron beam of deflection plane; The dynamic effects electron-beam convergence influences device to reduce first and second of between the electron beam of deflection plane distance.
The existence that influences device may be introduced the false composition (artifacts) of some undesirable image.Can influence so-called east/western pattern distortion, and the linearity of the electron beam deflecting in vertical direction.In conventional cathode ray tube, deflection in vertical direction is not the linear function of deflection current.Electricity consumption proofreaies and correct that this is non-linear.First and second introducings that influence device cause the non-linear reduction of cathode ray tube or by overcompensation.These effects are undesirable.
The purpose of this invention is to provide a kind of improved colour display device.For this reason, the invention provides colour display device and the deflection unit that limits as independent claims.Dependent claims has been described preferred embodiment.
Can understand these and other objects of the present invention by described embodiment, and followingly these and other objects are described with reference to described embodiment.
In the accompanying drawing:
Fig. 1 is the profile of colour display device;
Fig. 2 A, 2B represent first and second parts according to circular element of the present invention;
Fig. 3 represents according to deflection unit of the present invention; With
Fig. 4 A, 4B represent embodiments of the invention.
Accompanying drawing does not draw in proportion.In the accompanying drawing, identical reference number refers generally to identical part.
Display unit shown in Fig. 1 comprises color cathode ray tube, and color cathode ray tube has the vacuum casting 1 that comprises display window 2, conical section 3 and neck 4.Neck 4 is equipped with the I-shaped electron gun 5 that extends on the directions X of rectangle X-Z coordinate system, be used for being created in the three-beam electron- beam 6,7 and 8 that extends on a plane.At the state that is not deflected, center electron beam 7 is consistent with tubular axis 9 basically, extends on the Z axle.Third direction is the Y direction, extends (not shown) on the direction perpendicular to the yi word pattern plane.Usually, under condition of work, pipe is set like this, so that the X-Z plane is consistent with horizontal plane, with to make the Y direction consistent with vertical direction.
The display window inner surface is furnished with display screen 10.Display screen 10 comprises a large amount of fluorescence unit of emission red, green and blue fluorescence.Arrive in the path of display screen at electron beam, utilize electromagnetic deflection unit 51 to make the electron beam deflecting cross display screen also by color selecting pole 11, color selecting pole 11 is arranged on the front of display window 2 and comprises the thin plate with aperture 12.Three-beam electron- beam 6,7 and 8 is with relative to each other the smaller angle aperture 12 by color selecting pole, so each electron beam only bombards a kind of fluorescence unit of color.Except that coil brace 13, deflection unit 51 is included in the deflecting coil 13 ' of two orthogonal direction upper deflecting electron beams.Circular element 21 ' is set, promptly so-called yoke ring around deflecting coil 13 '.The purpose that generally includes ferritic yoke ring is the magnetic line of force " short circuit " that makes coil outer.If there is not yoke ring, must make electric current by deflecting coil very high and can produce the disturbance stray magnetic field so.Display unit also comprises the device that is used to produce voltage, and this device is by the element power supply of feedthrough to electron gun during operation.Schematically show deflection plane 20 and in this plane between the electron beam 6 and 8 apart from p, and between color selecting pole and the display screen apart from q.Apart from q be inversely proportional to apart from p.
Colour display device comprises that two electron-beam convergences influence unit 14,14 ', first module 14 is used to make outermost electron beam dynamic bending toward each other at work, promptly play the deflecting action in this direction, second unit 14 ' is used to make the outermost electron beam crooked in the opposite direction.Unit 14 is used to make electron beam bending toward each other, and unit 14 ' makes electron beam crooked in the opposite direction.As a result, be deflected distance between the electron beam of electron beam less than the distance between the deflection beam not.Because less, thereby can increase, can increase the curvature design freedom of color selecting pole like this apart from q apart from p.Utilize design freedom to increase to have curvature, reduce the possibility of vault and vibration simultaneously the favourable color selecting pole of color selecting pole intensity.
Two unit 14,14 ' are provided with by a certain distance each other.First module 14 is provided with more near electron gun, thereby is called " electron gun four utmost points ", and second unit 14 ' near or be positioned at deflection unit, thereby be called " yoke four utmost points ".Twine four coils that produce dynamic electromagnetism quadrupole field by going up, unit 14 ' and deflection unit 51 are become one easily at circular element 21 '.
During operation, unit 14,14 ' influences the deflection of electron beam, the undesirable false composition in the image that can cause showing on display window 2.
In the cathode ray tube (CRTs) of routine, the deflection on vertical (Y) size is non-linear phenomena, i.e. the displacement of electron beam is the nonlinear function that flows through the electric current of deflecting coil.Deflection at display window limit end electron beam requires few relatively electric current.Taking to proofread and correct nonlinear electronic method in the television set with this pipe is that so-called vertical S proofreaies and correct.Because of the effect of yoke four utmost points, the deflection of electron beam is more linear process, this means that the S correction has overcome the deflection nonlinearity phenomenon.This does not expect.
Conventional CRT also proofreaies and correct so-called Dong-Xi pincushion pattern distortion (Dong Hexi is meant two vertical side edge of display window).This means on screen the image that shows that the rectangular raster by horizontal and vertical lines the shape of cushion that resembles distortion constitutes, wherein the vertical line near the display window border curves inwardly.Obviously, the application of unit 14 ' has increased the false composition of this image.
The objective of the invention is to reduce the influence of unit 14 ' to the false composition of above-mentioned display image.The present invention is based on such consciousness, promptly unit 14 ' has it mainly to influence at the side of the circular element 21' that faces display window 2.Therefore propose to make circular element 21' split into two parts (coaxial division) and on of two parts, twine quadrupole coil.Best, partly twine quadrupole coil around magnetic core near electron gun.This method provides the possibility that is offset two magnetic core parts independently of each other, thereby improves the grating of pipe and assemble performance.
Fig. 2 A and 2B represent embodiments of the invention.Fig. 2 A illustrates the first 60 of circular element 21 ', and this part is near I-shaped electron gun 5.Part 60 is equipped with four coils 22 ' that are used to produce quadripolar magnetic field.Shown in coil with the annular (toroidal) mode be wrapped on the circular element., this for the present invention canoe is not essential.Can also twine quadrupole coil in the saddle type mode around circular element.For the ease of twine to handle and on the tram of first 60 lead separately of hold-in winding 22 ', first is furnished with annular element 64,66 on its end, this annular element 64,66 has groove in that the coil windings place is set.Fig. 2 B illustrates the second portion 68 of circular element 21 ', and this part is near display window 2.In the time of on being used for pipe, can be by conventional jockey this two parts 60,68 that are connected to each other such as glue, adhesive tape for example.For suitable performance, not necessarily must connect these two parts.
When Fig. 3 represents to be provided with around deflecting coil 13 ' and coil brace 13 according to two parts 60,68 of the present invention.First 60 is furnished with annular element 64,66 and is used to produce four coils 22 ' of quadripolar magnetic field.
Fig. 4 A and 4B represent embodiments of the invention, wherein by on winding direction and according to the annular conductor wire that twines of the following winding density distribution N (φ) that provides, obtaining around the coil 22 ' of the first 60 of circular element 21:
N(φ)=N 0cos(2φ)；
Wherein φ is the formed angle of line between directions X and coil unit and center, and this angle is between 0 ° and 360 °; N 0Be the winding density when φ equals 0 °, and the symbolic representation winding direction of N (φ).
Present embodiment has can produce the almost advantage of pure quadripolar magnetic field, can suppress the appearance in other many magnetic fields greatly.
Because of the finite size of lead, in fact can only roughly realize above-mentioned winding density.What present embodiment comprised the conductor wire that twines around magnet yoke ring 21 ' annular by above-mentioned winding density seals (packages) 30:
N(φ)=N 0cos(2φ)。
In the present embodiment, in the groove 34 of the interval of annular element 64,66 15 degree, twine.Winding method is as follows:
Spend in φ=0 (18 circles in groove a) of position,
15 circles in the groove of φ=15 degree (position b),
9 circles in the groove of φ=30 degree (position c),
In the groove of φ=45 degree (position d), there is not winding,
9 circles that current opposite in direction is arranged in the groove of φ=60 degree (position e),
15 circles in the groove of φ=75 degree (position f),
18 circles in the groove of φ=90 degree (position g), or the like.This approaches the desirable density N (φ) of winding, thereby brings forth good fruit in practice.
In a word, the present invention relates to colour display device, this display unit comprises the I-shaped electron gun 5 that produces three-beam electron- beam 6,7,8; The convergence unit 14 ' of dynamic effects electron-beam convergence and the arrangement for deflecting 51 of deflection beam 6,7,8.Convergence unit 14 ' comprises ring-type element 21 ', and described ring-type element comprises two parts, and first 60 more is provided with near I-shaped electron gun 5 than second portion 68, and first and/or second portion have four coils 22 ' that are used to produce quadripolar magnetic field.
Be noted that the foregoing description to show the present invention and do not limit the present invention that those skilled in the art can design many variant embodiment and not break away from the scope of appended claims.In these claims, any reference symbol in the bracket does not constitute the restriction to claims.The use verb " comprises " and its version does not repel not in those elements or the step described in claims.The article that uses before element " one (a or an) " is not got rid of a plurality of such elements and is existed.

Claims (5)

1. colour display device comprises:
Produce the I-shaped electron gun (5) of three-beam electron-beam (6,7,8);
The arrangement for deflecting (51) of deflection beam (6,7,8); With
The convergence apparatus (14 ') of dynamic effects electron-beam convergence, convergence apparatus (14 ') comprises ring-type element (21 '), it is characterized in that:
Described ring-type element (21 ') comprises two parts (60,68), first (60) more is provided with near I-shaped electron gun (5) than second portion (68), and first (60) and/or second portion (68) have four coils (22 ') that are used to produce quadripolar magnetic field.
2. colour display device as claimed in claim 1, wherein coil (22 ') comprises conductor wire, on winding direction and according to by N (φ)=N 0Winding density distribution N (φ) annular that cos (2 φ) provides is twined this conductor wire, and wherein φ is the formed angle of line between directions X and coil unit and center, and this angle is between 0 ° and 360 °; N 0Be the winding density when φ equals 0 °, and the symbolic representation winding direction of N (φ).
3. colour display device as claimed in claim 1, wherein coil (22 ') comprises seal (30) of conductor wire, on winding direction and according to by N (φ)=N 0Roughly winding density distribution N (φ) that cos (2 φ) provides annular is twined described sealing, wherein φ be directions X and seal the unit and the center between the formed angle of line.
4. deflection unit (51), comprise deflecting coil (13,13 ') and dynamic effects electron beam (6,7,8) convergence apparatus (14 ') of Hui Juing, convergence apparatus (14 ') comprises ring-type element (21 '), described ring-type element comprises two parts (60,68), first (60) more is provided with near I-shaped electron gun (5) than second portion (68), and first (60) and/or second portion (68) have four coils (22 ') that are used to produce quadripolar magnetic field.
5. deflection unit as claimed in claim 4 (51), wherein said coil (22 ') comprises conductor wire, on winding direction and according to by N (φ)=N 0Winding density distribution N (φ) annular that cos (2 φ) provides is twined this conductor wire, and wherein φ is the formed angle of line between directions X and coil part and center, and this angle is between 0 ° and 360 °; N 0Be the winding density when φ equals 0 °, and the symbolic representation winding direction of N (φ).
CN00801165A 1999-06-22 2000-06-19 Color display device having quadrupole convergence coils Pending CN1315053A (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US09/338,049 1999-06-22
US09/338,049 US6411027B1 (en) 1997-12-29 1999-06-22 Color display device having quadrupole convergence coils
EP00201506 2000-04-27
EP00201506.3 2000-04-27

Publications (1)

Publication Number Publication Date
CN1315053A true CN1315053A (en) 2001-09-26

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Application Number Title Priority Date Filing Date
CN00801165A Pending CN1315053A (en) 1999-06-22 2000-06-19 Color display device having quadrupole convergence coils

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EP (1) EP1105911A1 (en)
JP (1) JP2003502820A (en)
KR (1) KR20010089166A (en)
CN (1) CN1315053A (en)
TW (1) TW480524B (en)
WO (1) WO2000079561A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1409353A (en) * 2001-10-01 2003-04-09 松下电器产业株式会社 Cathod ray tube device
FR2895145A1 (en) * 2005-12-16 2007-06-22 Thomson Licensing Sas Tricolor CRT for tricolor picture tube, has electromagnetic deflection unit with dynamic electromagnetic four terminal network located between electron gun and unit, and supplied with current to render CRT completely self-convergent

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4117434A (en) * 1977-01-19 1978-09-26 General Electric Company Hybrid deflection system with quadripolar correction coils
JPS5815384A (en) * 1981-07-21 1983-01-28 Mitsubishi Electric Corp Color picture tube
JPS5830294A (en) * 1981-08-18 1983-02-22 Mitsubishi Electric Corp Color cathode-ray tube device
DE69020478T2 (en) * 1989-10-02 1996-02-22 Philips Electronics Nv Color picture tube system with reduced stain growth.
US5327051A (en) * 1990-07-19 1994-07-05 Rca Thomson Licensing Corporation Deflection system with a pair of quadrupole arrangements
DE69212873T2 (en) * 1991-04-02 1997-03-06 Philips Electronics Nv Color picture tube with reduced spot growth
DE69822613T2 (en) * 1997-12-29 2005-02-10 Koninklijke Philips Electronics N.V. COLOR DISPLAY DEVICE WITH DEFLECTIVE DEPENDENCE BETWEEN THE EXTERNAL RAYS

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Publication number Publication date
WO2000079561A1 (en) 2000-12-28
TW480524B (en) 2002-03-21
KR20010089166A (en) 2001-09-29
EP1105911A1 (en) 2001-06-13
JP2003502820A (en) 2003-01-21

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