CN1090679A - The electron gun of color cathode ray tube - Google Patents
The electron gun of color cathode ray tube Download PDFInfo
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- CN1090679A CN1090679A CN93108482A CN93108482A CN1090679A CN 1090679 A CN1090679 A CN 1090679A CN 93108482 A CN93108482 A CN 93108482A CN 93108482 A CN93108482 A CN 93108482A CN 1090679 A CN1090679 A CN 1090679A
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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
- H01J29/50—Electron guns two or more guns in a single vacuum space, e.g. for plural-ray tube
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Abstract
A kind of colour cathode-ray tube electron gun, a pair of horizontal symmetrical and the electrode coaxial with tubular axis are arranged, each electrode all has a common hole to separate each other, each electrode comprises first and second electrode members, and first element comprises that horizontal two tandem and part are superimposed and forms a plurality of holes of single window, the corresponding electron beam in each hole, second element and first element separate, each electrode also comprises an architrave and a control electrode plate near common hole, thereby simplifies the structure, and has improved electron beam and has focused on and convergence characteristics.
Description
The present invention relates to a kind of electron gun of color cathode ray tube, particularly relate to the configuration of the electron gun electrodes of the main electrostatic focusing lens that constitutes electron gun.
Conventional color cathode ray tube with array type electron gun as shown in Figure 1.Screen board 2 and coupled funnel part 3 before the glass shell 1 of cathode ray tube comprises.Scribble the three-colour light-emitting material is configured in screen board 2 in order to the phosphor screen of developing color image inwall.Be arranged in the shell 1 contiguous screen board 2 and spaced apart with phosphor screen in order to the shadow mask 4 that selects look.
Electron gun 5 is arranged in the neck part of funnel part 3 coaxially, along the coplane converging passageway, arrives phosphor screens by shadow mask 4 to produce and to guide three electron beams (every electron beam corresponding in the three primary colors of the same colour).More precisely, these by the molecular electron beam of thermoelectricity by negative electrode 6,7,8 emission of electron gun 5 and by the corresponding hole on first and second grids 9 and 10.Then, every electron beam along electron beam channel 11,12 and 13(shown in solid line among Fig. 1) in corresponding one direct into screen board 2.There is an axle parallel to each other in correspondingly hole in each negative electrode in the negative electrode 6,7,8 and first, second grid 9,10 on common plane, each all with electron beam channel 11,12,13 in corresponding one coincide.
Referring to Fig. 1, along central electronic beam passage 12, i.e. electron beam channel 11,12 and 13 central authorities extend to the line Z-Z of screen board 2, are called " direction of principal axis " hereinafter.Equally, vertical with direction of principal axis and along the line X-X of the common plane horizontal expansion at electron beam channel 11,12 and 13 places, be called " horizontal direction ", and do not provide among the direction of principal axis line Y-Y(figure vertical with horizontal direction), be called " vertical direction ".
Article three, each bar in the electron beam is all current along the electron beam channel 11,12 and 13 separately that is arranged on the common plane, by second grid 10, then by third and fourth grid 14 and 15.Third and fourth grid 14 and 15 constitutes auxiliary focusing lens.Then, every current first and second acceleration/focusing electrodes 16 and 17 that pass the main focusing lens that constitutes electron gun of electron beam.For constituting this main focusing lens, the second acceleration/focusing electrode 17 is added the voltage of 25KV～35KV, 20～30% of this voltage is added to first electrode 16.
Because the middle body of main focusing lens is coaxial with central electronic beam passage 12, this central electron beam, promptly that central electron beam of walking by the main focusing lens middle body in three electron beams is focused and attenuates, and is accelerated the phosphor screen that axially flies as the crow flies.Yet, because the Outboard Sections of main focusing lens is not coaxial with central electronic beam passage 12, two outer beams by the main focusing lens Outboard Sections in these three electron beams not only focus on and attenuate, but also to the central electronic beam convergence, intersect thereby these three electron beams are assembled at shadow mask 4 places, be accelerated then and arrive phosphor screen to excite colour thereon.
For electron beam is scanned on phosphor screen, outside pipe, press close to glass shell 1 place external magnetic deflection yoke 18 is set.The above-mentioned work that electron beam is attenuated with main focusing lens is called " focusing ", above-mentionedly makes the work of electron-beam convergence be called " electrostatic convergence " with main focusing lens.
Fig. 2 illustrates the first and second acceleration/focusing electrodes 16 of the used electron gun main focusing lens of prior art in the pie graph 1 and 17 part is analysed and observe perspective view.First acceleration/the focusing electrode 16 is made of the pipe that an end (open end) opens wide the non-garden cylindricality of the local closure of the other end (closing end).More precisely, first electrode 16 comprise housing 19 with the whole closing ends of 19 one-tenth of housings on closed end face 20.On the closed end face 20 three its electron beam through-holes 111,112 and 113 that are parallel to each other and separate are arranged.Each electron beam through-hole 111,112 and 113 all respectively by one in the tubular lip limit, garden 121,122 and 123 separately surround.The open end of housing 19 is all inwardly stretched on each tubular lip limit, garden from closed end face 20.
Second acceleration/the focusing electrode 17 structure with first electrode 16 in fact is identical, and with respect to horizontal direction and first electrode, 16 symmetries.Second acceleration/the focusing electrode 17 comprise housing 21 with the whole closed end faces 22 of 21 one-tenth of housings.On the closed end face 22 three electron beam through-holes 131,132 and 133 are arranged.In the electron beam through-hole 131,132 and 133 each all respectively by in tubular lip limit, garden 141,142 and 143 separately one surround.The open end of housing 21 is all inwardly stretched on each tubular lip limit, garden from closed end face 22.
The outer beams of this first acceleration/focusing electrode 16 by hole 111 and 113 along continuous straight runs with the first identical spacing, be centre-to-centre spacing, separate by hole 112 with central electron beam, and the spacing identical (as shown in Figure 1) between in this spacing and the outer beams passage 11,13 and the central electronic beam passage 12.Equally, the outer beams of the second acceleration/focusing electrode 17 separates by hole 132 with second identical spacing and central electron beam with 133 by hole 131.This second gap ratio, first spacing is big slightly.First and second acceleration/the focusing electrodes 16 and each closed end face 20 and 22 of 17 face toward mutually, and at a distance of a given distance " g ".
Three independently main focusing lenss are arranged in prior art constructions, each lens respectively with three electron beams in one corresponding.For example, three pairs of electron beam through-holes are arranged in the first and second acceleration/focusing electrodes 16 and 17, first pair comprises that apertura lateralis 111 and 131, the second pairs comprise that medium pore 112 and 132 and the 3rd pairs comprise apertura lateralis 113 and 133.Each all uses a pair of lip limit in first pair of lip limit 121 and 141, the second pairs of lip limits 122 and 142 and the 3rd pairs of lip limits 123 and 143 to surround respectively to electron beam through-hole.Three independently each of main focusing lens three electron beams are focused on by this that electron beam to electron beam through-hole.
Because it is big corresponding to first spacing of the electron beam through-hole 111,112 of the first acceleration/focusing electrode 16 and 113 corresponding to second gap ratio of the electron beam through-hole 131,132 of the second acceleration/focusing electrode 17 and 133, so comprise that a pair of central electron beam is coaxial with direction of principal axis by hole 112 and 132 central main focusing lens, and comprise pair of outside electron beam through- hole 111 and 131 and another outside main focusing lens to outside electron beam through- hole 113 and 133 not coaxial with direction of principal axis.
Therefore, the central electron beam by central main focusing lens focuses on and attenuates, and is accelerated, the phosphor screen that axially flies as the crow flies, and the outer beams by outside main focusing lens not only focuses on and attenuates but also to the central electronic beam convergence.
Usually, the resolution of color cathode ray tube is influenced by the focus characteristics of electron gun in it.The aperture of the focus characteristics of this cathode ray tube and the main focusing lens of electron gun is closely related.More precisely, the multiplying power of main focusing lens and spherical aberration influence the focus characteristics of color cathode ray tube.These factors strictly depend on the intensity of main focusing lens focussing force.Therefore, if the size of electrostatic lens or diameter increase with ratio R, then in the electrostatic lens second of current potential difference quotient with 1/R
2Ratio reduce.
As a result, the intensity A of lens is～1/R that the spherical aberration C of lens is: C～1/R
3Therefore, spherical aberration C can reduce significantly with the increase in main focusing lens aperture, and the multiplying power of main focusing lens can reduce with the reduction of lens strength.And then can obtain little electron-beam point and can improve the focus characteristics of lens by following relation:
Diameter by the definite electron-beam point of the multiplying power of main lens:
DX＝M·dX
The diameter of the electron-beam point that causes because of spherical aberration:
DC＝1/2M·C·θ
3
Wherein: M is the multiplying power of main focusing lens;
C is the spherical aberration coefficient of main focusing lens;
DX is the size of imaging object; With
θ is the incidence angle of main focusing lens place electron beam.
Yet, when the in-line arrangement color cathode ray tube of routine is used above-mentioned relation, because be arranged on the common horizontal plane with corresponding three main focusing lenss of electron beam, hole 111,112,113,131,132 in constituting the first and second acceleration/focusing electrodes 16 and 17 of main focusing lens and 133 diameter should be less than 1/3rd of the neck part internal diameters of the glass shell 1 that holds electron gun 5.When the thickness of considering this acceleration/focusing electrode and mechanical tolerance, the maximum of electron beam through-hole allows diameter dimension further to be restricted.
Though the internal diameter that increases the neck part can increase the diameter of electron lens, this will increase deflection power.And the increase of electron beam through-hole diameter can make the centre-to-centre spacing between the hole increase, and this just influences convergent effect on the contrary.
As the way of dealing with problems, at United States Patent (USP) NO.4,599,534(1986 issued July 8) and 4,626,738(1986 issued December 2) in attempt in the element that separates, to form this hole, make the aperture in the scope of physical restriction, reach maximum, rather than directly form the hole of the first and second acceleration/focusing electrodes as described above at the closed end face of electrode.In above-mentioned patent, for the effective diameter that increases main focusing lens and level and vertical focusing by balanced lens are used for eliminating dispersion phenomenon, in the shell of pipe, used by housing and the electrostatic field control electrode that has the separate mesh electrode plate of ellipse garden or polygonal hole to constitute.
Though above-mentioned approach can help to reduce the number of elements of electrostatic field control electrode, in order to control the deep infiltration of electric field effectively to level and vertical direction comparative electrode, the size of ellipse garden shape or polygonal hole must be limited by multinomial or other complicated formula, this just makes electrode design complicate, and makes electrode design be difficult to change design according to the variation of color cathode ray tube size and/or the variation of used deflecting coil pattern.
The purpose of this invention is to provide a kind of electron gun, particularly the size of its electron gun main focusing lens is accommodated the situation of restriction of the pipe glass bulb neck internal diameter of electron gun with improved color cathode ray tube focus characteristics.
Another object of the present invention provides a kind of electron gun with simple hole shape to simplify the design of electron gun, realizes the variation of electron gun structure simple and easyly.
For reaching this purpose and invention intention, according to described embodiments of the invention, electron gun of the present invention comprises the device that produces many electron guns, every electron beam is corresponding to a colour cell that forms chromatic image, a pair of main focusing lens device is symmetrical mutually with respect to horizontal direction substantially, and coaxial at direction of principal axis and ray tube.This is coupled to the electron production device to the prime focus electrode assembly, so that provide path for electron beam.Each prime focus electrode assembly has a common hole, each common hole and at interval given distance relative with another common hole.Each prime focus electrode assembly comprises first and second electrode members.First electrode member in the main focus lens electrode device and the common hole of electrode assembly are in a direction of principal axis given distance at interval.This first electrode member comprises the hole that a plurality of bunchiness are in the horizontal direction arranged, and these holes part each other are superimposed, have one or more congruent regions, and connects mutually to form single window.Each of these holes respectively with many electron beams in one corresponding.Second electrode member and first electrode member one are given set a distance at interval at direction of principal axis, than the common hole of first electrode member further from electrode assembly.
According to will be in the another embodiment of the present invention of this general description, each electrode assembly comprises:
Near the architrave of electrode assembly common hole, this architrave comprises that the endless belt element and that a common hole edge in the electrode assembly extends a distance has the superimposed hole of these parts of link element in the superimposed hole of a plurality of parts to constitute single window; With
One is located in the electrode assembly and gives the control electrode plate of set a distance at interval with architrave.
Other purpose of the present invention and advantage will state in the following description, and will be well understood to by the following description, or recognize by practice of the present invention.These purposes of the present invention and advantage will realize and finish by means of each unit that particularly points out in described claim and combination.
The accompanying drawing that combines with specification and constitute this specification part has been showed several embodiments of the present invention, and with declaratives in order to illustrate principle of the present invention.
Fig. 1 is the cross-sectional view of the color cathode ray tube of prior art.
Fig. 2 is the partial view that the part of prior art colour cathode-ray tube electron gun main focusing lens among Fig. 1 cuts.
Fig. 3 is the partial view that the part of the colour cathode-ray tube electron gun main focusing lens of first preferred embodiment of the invention cuts.
Fig. 4 is the partial view that the part of the colour cathode-ray tube electron gun main focusing lens of second preferred embodiment of the invention cuts.
Fig. 5 is the perspective view of first kind of modification of second electrode member of electron gun first and second electrodes of first and second embodiment of the present invention.
Fig. 6-1,6-2 are the perspective view and the end views of second kind of modification of second electrode member of electron gun first and second electrodes of first and second embodiment of the present invention.
Fig. 7 is the perspective view of the third modification of second electrode member of electron gun first and second electrodes of first and second embodiment of the present invention.
Fig. 8 is the perspective view of the 4th kind of modification of second electrode member of electron gun first and second electrodes of first and second embodiment of the present invention.
Fig. 9 is the partial view that the part of the colour cathode-ray tube electron gun main focusing lens of third preferred embodiment of the invention cuts.
Figure 10 is the partial view that the part of the colour cathode-ray tube electron gun main focusing lens of four preferred embodiment of the invention cuts.
Figure 11 is the partial view that the part of the colour cathode-ray tube electron gun main focusing lens of fifth preferred embodiment of the invention cuts.
Figure 12 is the partial view that the part of the colour cathode-ray tube electron gun main focusing lens of sixth preferred embodiment of the invention cuts.
Figure 13 is the partial view that the part of the colour cathode-ray tube electron gun main focusing lens of seventh preferred embodiment of the invention cuts.
Example now with reference to accompanying drawing is described in detail the preferred embodiments of the present invention.Wherein identical reference numerals is all being represented same or similar parts in the accompanying drawing.
The colour cathode-ray tube electron gun that Fig. 3 illustrates first embodiment of the invention is partly dissectd to show the perspective view of critical piece.First and second acceleration/focusing electrode the 16a and 17a face and constitute the main focusing lens of electron gun mutually.Each of the first and second electrode 16a and 17a comprises one the non-garden cylindrical tube that has respectively in housing 23 and 25.Each housing 23(or 25) at one end (open end) hole is arranged, one common hole 27(or 28 is arranged) at the other end.These holes are preferably ellipse garden shape (perhaps being called " endless belt " shape hereinafter), and its horizontal direction size is bigger than vertical direction size.
Each common hole 27(or 28) for electron beam provides passage, and one architrave 24(or 26 is preferably being arranged) near the periphery place.The common hole 27 of the first electrode 16a and the common hole 28 of the second electrode 17a are faced mutually.Architrave 24(or 26) preferably include architrave face 24a(or a 26a relative on the common hole periphery with another common hole) and a narrow endless belt 24b(or a 26b).Common hole 27(or 28) peripheral part towards the open end direction to housing 23(or 25) in crooked (or folding) so that near common hole 27(or 28) inwall form narrow endless belt 24b, this narrow endless belt constitutes architrave 24(or 26).
Here the said first electrode 16a comprises that one is positioned at first electrode member 29 of housing 23, and the periphery of first electrode member 29 and architrave face 24a(or common hole 27) (perhaps be called " recessed " hereinafter) at interval and one give set a distance.Equally, the second electrode 17a comprises first electrode member 30 that is positioned at housing 25, and first electrode member 30 is from the periphery of architrave face 26a(or common hole 28) recessed one given distance.Here said each first electrode member 29(or 30) comprise three holes that part is superimposed, they are the chain type bunchiness and arrange.These three holes interconnect and constitute single window 35(or 36 jointly).Each of three holes is respectively an electron beam one passage is provided, and garden shape preferably.
Here the said first electrode 16a also comprises second electrode member 31 near first electrode member 29, and second electrode member 31 and first electrode member, 29 intervals, one given distance h, and recessed further from architrave face 24a with respect to first electrode member 29.Equally, the second electrode 17a also comprises second electrode member 32 near first electrode member 30, and second electrode member 32 and the given distance h in first electrode member, 30 intervals one, and recessed further from architrave 26a with respect to first electrode member 30.
Each second electrode member 31(or 32) comprise the frame element that a pair of cardinal principle is vertical, they are spaced from each other in the horizontal direction and are parallel to each other in vertical direction.Each vertical frame element all has a given width " W ", and is provided with respectively near the first electrode member 29(or 30) two superimposed parts in three holes of single window 35 in one.Each perpendicular elements and corresponding superimposed part be a given distance h at interval, and with respect to the first electrode member 29(or 30) further from architrave 24(or 26) recessed.
According to single embodiment of the present invention, the first electrode 16a(or the second electrode 17a) comprise with given distance h apart from one another by the first electrode member 29(or 30 that opens) and the second electrode member 31(or 32).And, at the second electrode member 31(or 32) in, this is preferably in the one end parts to vertical frame element and is connected to each other with a horizontal frame element, forms band apart from shape window 37(or 38) fence formula rectangle frame 31a(or 32a).It is big that the vertical dimension of this rectangular window cans be compared to its horizontal size most.
Each rectangle frame 31a(or 32a) horizontal cell preferably to the first electrode member 29(or 30) crooked and and its mechanical connection to guarantee the first electrode member 29(or 30) and the second electrode member 31(or 32) between a fixed range h is arranged.The first electrode member 29(or 30) and the second electrode member 31(or 32) constitute electrostatic field control electrode plate jointly.This electrostatic field control electrode plate from architrave 24 and 26 corresponding one inside recessed one give set a distance.
Among architrave face 24a and the 26a each is relative with another, and the given distance " g " of each interval one, and said architrave face 24a and 26a are equivalent to the end face of the first and second acceleration/focusing electrode 16a and the corresponding common hole of 17a.Therefore, as said, in the kind electrode structure of electron gun of the present invention, electric field between first and second electrode 16a that common hole end face is relative to each other arranged and 17a penetrates electrostatic field control electrode plate dearly, thereby plays the effect of the effective diameter that increases main focusing lens in fact.Owing to have a this electron gun structure of the present invention, thereby the effect that adopts the aperture that increases main focusing lens to obtain usually, then utilize the present invention to need not to carry out again such machinery and increase and also can reach.
Common hole 27(or 28) by architrave 24(or 26) around and the shape in non-garden shape (preferably ellipse garden) is arranged, the size of its horizontal direction is bigger than the size of vertical direction.Therefore, the infiltration of electric field is in the horizontal direction than big in vertical direction, and the effective diameter that makes main focusing lens is in the horizontal direction than big in vertical direction, thereby makes the horizontal focusing effect of main focusing lens littler than vertical focusing effect.As a result, when electron beam focuses on, owing to the difference between level and vertical direction focal length produces astigmatism.
Electron gun of the present invention has been corrected such astigmatism effectively.As previously mentioned, in the first and second acceleration/focusing electrode 16a and 17a each, this electrostatic field control electrode plate is by housing 23(or 25) the interior first electrode member 29(or 30) and the second electrode member 31(or 32) constitute, so that the infiltration of electric field is not only in level and vertical direction Be Controlled, at direction of principal axis also Be Controlled.
As mentioned above, electrostatic field control electrode plate of the present invention comprises first and second electrode members.The first electrode member 29(or 30) comprise three superimposed holes that are the formation single window that the chain bunchiness arranges, the second electrode member 31(or 32) comprise and a pair ofly preferably can define a rectangular window 37(or 38 betwixt) parallel vertical frame element.The second electrode member 31(or 32) with the first electrode member 29(or 30) spaced apart with distance h, and the relative first electrode member 29(or 30) further from architrave 24(or 26) recessed to the open end of housing.This first electrode member 29(or 30) with the second electrode member 31(or 32) coaxial.
In this structure of electrode, the infiltration of electric field is with the first electrode member 29(or 30) and the second electrode member 31(or 32) both control, and the control action of double effective rectification astigmatism is so just arranged.And because the second electrode member 31(or 32) rectangular opening 37(or 38) preferably the size of its horizontal direction is littler than the size of vertical direction, the infiltration of electric field Be Controlled relatively on horizontal size, so each level and vertical focusing effect are adjusted equally substantially in three main focusing lenss, so that eliminate astigmatism.
Yet, although the rectangular window 37(or 38 of second electrode member) make focussing force balance on level and vertical both direction substantially, but the current potential in the rectangular window bight is not also controlled effectively, thereby can not obtain garden shape electron-beam point on phosphor screen.Means as a kind of control second electrode member rectangular window bight current potential, the first electrode 29(or 30) be provided with near the second electrode 31(or 32), said first electrode comprises three holes, garden that part is superimposed, the superimposed hole, garden of these three parts is the arrangement of chain bunchiness and constitutes single window 35(or 36), the said second electrode member 31(or 32) comprise a rectangular window, this just makes the second electrode member 31(or 32) rectangular window 37(or 38) the bight can be effectively by the first electrode member 29(or 30) the garden arc part institute of medium pore cover.Therefore the current potential in the second electrode member rectangular window bight is under control, thereby can form garden shape electron-beam point on phosphor screen.
The typical sizes of each element is shown in following table 1 in the first preferred embodiment of the invention electron gun.
Table one
First acceleration/focusing electrode the 16a:
Be surrounded with the horizontal diameter of the electron beam common hole 27 of architrave 24: 19.0mm
The perpendicular diameter of common hole 27: 8.0mm
Distance between the architrave 24 and first electrode member 29: 3.0mm
Distance between the architrave 24 and second electrode member 31: 4.0mm
The diameter in the shape hole, central garden of first electrode member 29: 8.0mm
The diameter in the shape hole, garden, both sides of first electrode member 29: 8.0～10.0mm
The horizontal size of the rectangular side window 37 of second electrode member 31: 4.4mm
The vertical dimension of the rectangular side window 37 of second electrode member 31: 10.0mm
The width W of the vertical frame element 31a of second electrode member 31: the 1.0mm second acceleration/focusing electrode 17a:
With architrave 26 around the horizontal diameter of common hole 28 of electron beam: 19.0mm
The perpendicular diameter of common hole 28: 8.0mm
Distance between the architrave 26 and first electrode member 30: 2.05mm
Distance between the architrave 26 and second electrode member 32: 3.05mm
The diameter in the shape hole, central garden of first electrode member 30: 8.0mm
The diameter in the shape hole, garden, both sides of first electrode member 30: 8.0mm～10.0mm
The horizontal size of the rectangular window 38 of second electrode member 32: 5.2mm
The vertical dimension of the rectangular window 38 of second electrode member 32: 10.0mm
The width W of the vertical frame element 32a of second electrode member 32 ': 0.6mm
Gap g:1.0mm between the architrave 24 and 26 of the first and second acceleration/focusing electrode 16a and 17a
And, because each electrostatic field control electrode plate is by housing 23(or 25) architrave 24(or 26) inwardly recessed, the convergent force that points to central electron beam acts on the outer beams, thereby provides one to assemble effect.
In first preferred embodiment of the present invention, the first electrode member 29(or 30) hole, garden, in the hole, three superimposed gardens two outsides provides the effective aperture of main focusing lens for outer beams, and hole, said three superimposed gardens constitutes the single window 35(or 36 of electrostatic field control electrode plate jointly).The diameter in these holes, garden, outside single window 35(or the 36 first electrode member 29(or 30)) cans be compared to most single window 35(or 36) hole, three superimposed gardens in the diameter in hole, central garden big.And, the first electrode member 29(or 30) garden, outside bore dia single window 35(or 36) is in the scope that is limited by color cathode ray tube screen size and/or used deflecting coil type, preferably make it big as far as possible, so that outer beams is to the central electronic beam convergence.
Fig. 4 illustrates second preferred embodiment of the present invention.The structure of the electron gun of second embodiment destatics outside the structure of first electrode member of electrode for field control plate, and the structure with the electron gun of first embodiment (shown in Fig. 3) is identical substantially.In a second embodiment, preferably make the apertura lateralis of the single window of first electrode member in given limited field, reach maximum.Label same in Fig. 3 and 4 is in order to represent same or similar element.
Referring to Fig. 4, first electrode member 29a(or the 30a in second preferred embodiment) comprise that as in first preferred embodiment arrange in three holes, garden that part is superimposed, their chain type bunchiness and the formation single window.Yet in this second preferred embodiment, first electrode member 29a(or the 30a) each Outboard Sections near its outside half garden part is vertically cut away in the garden, two outsides.Preferably cut away half of each hole, garden, the outside approximately, so that the remainder in hole, garden, the outside forms a garden arc or half garden near the medium pore place.
The outer end in each hole, garden, the outside in other words, first electrode member 29a(or the 30a) is opened wide.Therefore, when electrostatic field control electrode plate is arranged on housing 23(or 25) in the time, the apertura lateralis of single window first electrode member 29a(or the 30a) (it provides path for the garden arc shape and for outer beams now) is with housing 23(or 25) inwall and the residue garden arc part in hole, garden, the outside define effectively, this has just increased first electrode member 29a(or the 30a) the effective diameter in outer beams hole.
Fig. 5,6-1,6-2,7 and 8 illustrate the second electrode member 31(or 32 according to first and second embodiment of the present invention) the typical variant of vertical frame component structure of pair of parallel.Referring to Fig. 5, the most handy a pair of horizontal bar of vertical bar is connected to each other to form the rectangle frame of said shape.The width dimensions of the horizontal direction of vertical bar (W) is bigger than gauge (t) at its direction of principal axis.Each vertical bar is arranged near the first electrode member 29(or 30) the corresponding congruent region place in three superimposed holes.
Interconnect referring to Fig. 6-1,6-2 vertical bar, and bigger than its thickness (t) like that in the best image pattern 5 of the width of each vertical bar (W).Yet each vertical bar is curved several angles in Fig. 6-1,6-2.The vertical bar of these crooked (or angle is arranged) is parallel to each other substantially in vertical direction, and the most handy a pair of horizontal bar connects hole or the window that is roughly rectangle with formation.It is big that the vertical dimension of this rectangular window cans be compared to horizontal size most.
The vertical bar of each being bent angularly should comprise a pair of primary element a, a supporting member c and a pair of Connection Element b.Each primary element a is parallel with supporting member c substantially in vertical direction, and the space is apart from l.Each primary element a is connected with supporting member c with angle θ by a corresponding Connection Element b.Angle θ influence is to the control degree of the astigmatism relevant with electron beam.
A corresponding congruent region setting in three the superimposed holes close first electrode member 29(or 30 of each vertical bar).
Referring to Fig. 7, the second electrode member 31(or 32) comprise a pair of vertical direction vertical bar parallel to each other substantially and with given distance apart from one another by opening.Each vertical bar all limits by in the horizontal direction width W with in axial thickness t.The thickness t of each vertical bar is preferably all big than width W.
Referring to Fig. 8, each vertical bar in the central the part all have one towards architrave 40(shown in Fig. 9,10) cavity.The cavity of each vertical bar is preferably the shape in half ellipse garden.Perhaps the cavity of this each vertical bar also can be half garden shape with given radius R.Each vertical bar is provided with near a corresponding clearance space place between red, green, the blue electron beam of representative, perhaps near the first electrode member 29(or 30) the corresponding congruent region setting in three superimposed holes.
According to this preferred embodiment of the present invention, the common hole of first and second electrodes relative to each other, and a corresponding corresponding electrostatic field control electrode plate is recessed from the architrave of corresponding common hole in each and these common hole.Therefore, the effective aperture of main focusing lens increases owing to electric field infiltrates through electrostatic field control electrode plate dearly, and need not increase the distance between the electron beam channel, thereby has obtained to pass through the mechanically obtainable effect same of hole diameter enlargement.
Because electrostatic field control electrode plate is subjected to converging action to central electron beam from the recessed outer beams that makes of architrave, so under the situation that does not increase distance between the electron beam channel, obtained the effective aperture of big main focusing lens, thereby reduced deflection power, improved the focusing and the convergence characteristics of lens.And then the electrode that constitutes electron gun main focusing lens of the present invention not only can both be controlled the infiltration of electric field effectively in level and vertical direction but also at direction of principal axis, thereby controls astigmatism effectively.Electron gun of the present invention can increase the effective diameter of main focusing lens under the situation that does not increase the electrode size that constitutes condenser lens.
In addition, electron gun of the present invention has improved the focus characteristics of main focusing lens, it does not require the complex-shaped of hole, and can more effectively penetrate into electrostatic field control electrode plate dearly in level and vertical direction control electric field, and this can easily realize the change of its structural design with regard to making electron gun of the present invention according to the variation of ray tube screen dimensions and/or used deflecting coil type.
Fig. 9 illustrates the perspective view that dissects according to the part of the main focusing lens of the colour cathode-ray tube electron gun of third preferred embodiment of the invention.In Fig. 9, use the identical identical or like of label representative used among Fig. 3 and 4.Because the first and second electrode 16a and 17a are symmetrical along trunnion axis, so the first electrode 16a only is described at this.
Referring to Fig. 9, according to this 3rd embodiment, the first electrode 16a comprises the electrostatic field control electrode plate 42 of an architrave 40 and in the first electrode 16a.Architrave 40 comprises: do not draw on the periphery of the common hole of the first electrode 16a and facing among the second electrode 17a(figure) architrave face 40a; Inner edge wall from architrave face 40a along housing 23 extends the architrave endless belt 40b of certain distance; With chain link formula architrave element 40c.Preferably the architrave face 24a with shown in Figure 3 is identical with architrave endless belt 24b respectively with architrave endless belt 40b at this said architrave face 40a.
Here said chain link formula architrave element 40c preferably includes the hole of three part garden substantially superimposed and that constitute single window shapes, and preferably identical with first electrode member 29 shown in Figure 3 or the first electrode member 29a shown in Figure 4.Here said chain link formula element 40c preferably is attached on the inner rim of architrave endless belt 40b.On the other hand, chain link formula architrave element 40c is arranged in the architrave endless belt 40b and becomes whole with it.Chain link formula architrave element 40c is from the recessed a little distance of architrave face 40a.
According to this 3rd embodiment, architrave 40 constitutes the common hole of the first electrode 16a with non-garden barrel shape on its stomidium opposite.Here said architrave 40 preferably includes a narrow architrave endless belt 40b now, the chain link formula architrave element 40c combination in the hole, garden that this endless belt 40b and three parts are superimposed.The architrave structure of this combination makes the housing 23 interior electrostatic field control electrode plates 42 of the first electrode 16a become simple single structure.Control electrode plate 42 is preferably from architrave 40 recessed distances.
Usually, there are two kinds and form the method that electron beam provides the electrode hole of common-use tunnel.A kind of method is the common hole architrave (for example, shown in the image pattern 3) that forms endless belt shape, and another kind of method is that its architrave is made chain link shape (for example, as shown in Fig. 9).Select for use the mode of endless belt shape architrave better, because it can provide maximum effective lens diameter.
Yet, because with red, green, blue corresponding every electron beam all be unlimited fully (or exposing to the open air) to another, so endless belt shape architrave is defective.In other words, the space between the electron beam is unrestricted.This just is difficult to control the astigmatism relevant with each electron beam.Therefore, for proofreading and correct such China fir that resembles, have electrostatic field control electrode plate in its housing of electrode of this type architrave structure and must be complicated or more than one constitutional detail is arranged.
This chain link shape architrave comprises the link element with the superimposed hole, garden of three parts.Part congruent region between these holes, garden can be with the spatial limitation between the electron beam to a certain degree.Therefore.Electrode with this architrave version can be controlled and the relevant astigmatism of corresponding electron beam red, green, Lan Sanse effectively.Yet because chain link shape architrave does not provide complete hole, it has limited effective lens diameter.
The present invention has overcome above-mentioned defective.For example, according to the third embodiment of the present invention, referring to Fig. 9, architrave 40 comprises that combination has the architrave endless belt 40b of link element 40c.Architrave endless belt 40b inwardly extends a given length along housing inner edge wall from the housing periphery, so that effectively lens diameter reaches maximum.And the space between the electron beam being restricted to a certain degree annularly from the recessed link element 40c of set a distance that gives of its periphery of architrave 40 is so that the wall angle part passed through of controlling electron beam annularly.
Therefore, owing to have in this said this architrave structure, its shape of electrostatic field control electrode plate in the housing of this non-garden cylindrical electrode needn't be done to such an extent that complicatedly also can eliminate astigmatism effectively on vertical and horizontal both direction.
For example, referring to Fig. 9, in the recessed distance of these said electrostatic field control electrode plate 42 common hole (or architrave face 40a) from the first electrode 16a, and preferably include a pair of equal in length, at vertical direction vertical bar substantially parallel to each other.This to vertical bar to give set a distance apart from one another by opening, to form rectangular window.The vertical dimension of window is the biggest like its horizontal size like this.This is to each all corresponding superimposed district setting in the hole, three superimposed gardens of part of the chain link shape architrave element 40c of close architrave 40 in the vertical bar.As shown in Figure 9, each vertical bar is all limited by the width dimensions W and the axial gauge t bigger than width dimensions W of horizontal direction.
In Fig. 9,, the structure of the first electrode 16a has only been described for for simplicity.The principle that is applicable to the first electrode 16a is equally applicable to the second electrode 17a.The typical sizes of element is shown in the following table 2 in the electron gun of third preferred embodiment of the invention.
Table two
First acceleration/focusing electrode the 16a:
By the architrave endless belt element 40b of architrave 40 around the horizontal diameter of electrode common hole: 19.0mm
By the architrave endless belt element 40b of architrave 40 around the perpendicular diameter of electrode common hole: 8.0mm
The axial width of the architrave endless belt element 40b of architrave 40: 0.5～1.2mm
With the chain link formula architrave element 40c of architrave 40 around the horizontal diameter of common hole: 18.0～20.0mm
The garden bore dia of chain link formula architrave element 40c: 8.0mm
Chain link formula architrave element 40c is at axial thickness: 0.5～1.0mm
Distance between electrostatic field control electrode plate 42 and the architrave 40: 3.0～4.2mm
The horizontal size of the rectangular window of control electrode plate 42: 5.1mm
The vertical dimension of the rectangular window of control electrode plate 42: 10.0mm
The width W of the vertical bar of control electrode plate 42: 0.5mm
The thickness t of the vertical bar of control electrode plate 42: 2.0mm
Second acceleration/focusing electrode the 17a:
By the architrave endless belt element 40b of architrave 40 around the horizontal diameter of electrode common hole: 19.0mm
By the architrave endless belt element 40b of architrave 40 around the perpendicular diameter of electrode common hole: 8.0mm
The architrave endless belt element 40b of architrave 40 is at axial thickness: 0.5～1.2mm
By the chain link formula architrave element 40c of architrave 40 around the horizontal diameter of common hole: 18.0～20.0mm
The diameter in the hole, central garden of chain link formula architrave element 40c: 7.4mm
The diameter in the hole, garden, the outside of chain link formula architrave element 40c: 8.0mm
Chain link formula architrave element 40c is at axial thickness: 0.5～1.0mm
Distance between electrostatic field control electrode plate 42 and the architrave 40: 2.1～3.3mm
The horizontal size of the rectangular window of control electrode plate 42: 5.1mm
The vertical dimension of the rectangular window of control electrode plate 42: 10.0mm
The thickness t of the vertical bar of control electrode plate 42: 2.0mm
The width W of the vertical bar of control electrode plate 42: 0.5mm
Figure 10 illustrates the perspective view that the main focusing lens according to the colour cathode-ray tube electron gun of four preferred embodiment of the invention partly dissects.Referring to Figure 10, identical with shown in Fig. 9 substantially in this said architrave structure.
Referring to Figure 10, according to the 4th embodiment, the recessed distance of electrostatic field control electrode plate 44 common hole (or architrave 40) from the first electrode 16a, and preferably include a pair of vertical bar that is parallel to each other substantially in vertical direction.As at the 3rd embodiment, each vertical bar is all by width W with can be compared to the big thickness t of width most and define.At this said each vertical bar one cavity towards architrave 40 is arranged all preferably partly in the central.The cavity of each vertical bar is preferably half ellipse garden shape.Perhaps, the cavity of each vertical bar is half garden shape with given radius R.Each vertical bar is near being provided with corresponding to one between red, green, the blue electron beam corresponding space.Can control the astigmatism relevant effectively with this control electrode plate structure with electron beam.
Figure 11 illustrates the perspective view that dissects according to the part of the main focusing lens of the colour cathode-ray tube electron gun of the 5th preferred embodiment of the present invention.Identical with shown in Fig. 9 substantially in this said architrave structure.
Referring to Figure 11, the recessed distance of said here electrostatic field control electrode plate 46 common hole (or architrave face 40a) from the first electrode 16a, and also it is equal substantially to preferably include a pair of length, at vertical direction vertical bar parallel to each other substantially.The most handy a pair of horizontal bar of these vertical bars is connected to each other to form a rectangular window.The vertical dimension of rectangular window is the biggest like horizontal size like this.This to each of vertical bar all near the corresponding congruent region setting in the superimposed hole, garden of three parts of the chain link formula architrave element 40c of architrave 40.Each vertical bar all uses the width dimensions W of horizontal direction and the axial gauge t littler than width dimensions W to limit.
Figure 12 illustrates the perspective view that the main focusing lens according to the colour cathode-ray tube electron gun of the 6th preferred embodiment of the present invention partly dissects.Here said architrave structure is identical with shown in Fig. 9 substantially.
Referring to Figure 12, electrostatic field control electrode plate 48 comprises the curved angled vertical bar that a pair of shape is identical substantially.These curved angled vertical bars are parallel to each other substantially in vertical direction, and the most handy a pair of horizontal bar connects hole or the window that is roughly rectangle with formation.The width that the height of this rectangular window in vertical dimension cans be compared to horizontal direction most is big.
Here said each curved angled vertical bar comprises pair of substrates element 48a, a supporting member 48c and a pair of Connection Element 48b.Each base members 48a is parallel to supporting member 48c and with interval apart from l substantially in vertical direction.Each base members 48a by a corresponding Connection Element 48b at angle θ be connected to supporting member 48c.The controlled degree of the astigmatism that angle θ influence is relevant with electron beam.
Figure 13 illustrates the perspective view that the main focusing lens according to the colour cathode-ray tube electron gun of seventh preferred embodiment of the invention partly dissects.Here said architrave structure is identical with shown in Fig. 9 substantially.
Referring to Figure 13, according to the 7th embodiment, electrostatic field control electrode plate 46 is from architrave 40 recessed distances, and comprises that one has the horizontal electrostatic control battery lead plate in many holes, to correct astigmatism.Each is preferably corresponding corresponding electron beam in hole of garden shape, and separates with other holes that constitute individual window.The diameter of apertura lateralis is preferably different with the diameter of medium pore in the control electrode plate, so that the astigmatism relevant with outer beams controlled to the same degree of the astigmatism relevant with central electron beam.
Other embodiment of the present invention are concerning those skilled in the art, according to readily understanding in this disclosed explanation of the present invention and practice.This means specification and example only as demonstration, actual range of the present invention and spirit are limited by following claim.
Claims (30)
1, a kind of colour cathode-ray tube electron gun, have mutually perpendicular substantially axially, level and vertical direction parts, this electron gun comprises:
Produce the device of many electron beams, every corresponding corresponding colour cell that forms chromatic image of electron beam: and
The pair of electrodes device, they are symmetrical mutually substantially with respect to horizontal direction, coaxial at direction of principal axis and ray tube, and provide passage for said many electron beams, in the said pair of electrodes device each all has a common hole, each common hole is relative with another, and spaced apart with given distance and another at direction of principal axis, and each electrode assembly comprises:
First electrode member, it is in electrode assembly, and one give set a distance at interval in direction of principal axis and its common hole, said first electrode member is included in a plurality of holes that the horizontal direction bunchiness is arranged, part is superimposed mutually in twos in said a plurality of hole, has one or more superimposed districts and connection in twos mutually, so that constitute single window jointly, in corresponding said many electron beams in each hole corresponding one and
Second electrode member, it in electrode assembly, and in direction of principal axis and first an electrode member given distance at interval, and at direction of principal axis than the common hole of first electrode member further from electrode assembly.
2, according to the said electron gun of claim 1, it is characterized in that the common hole of said electrode assembly has the hole shape of non-garden shape, the size of its horizontal direction is bigger than the size of vertical direction.
3,, it is characterized in that in said a plurality of hole each all is roughly garden shape according to the said electron gun of claim 1.
4, according to the said electron gun of claim 1, it is characterized in that a plurality of holes of said first electrode member comprise a medium pore and pair of outside hole, each apertura lateralis is partly superimposed and bigger than medium pore with medium pore in the horizontal direction.
5, according to the said electron gun of claim 1, the a plurality of holes that it is characterized in that said first electrode member comprise a medium pore and pair of outside hole, each apertura lateralis is partly superimposed with medium pore in the horizontal direction, and wherein first electrode is vertically cut away near the outer end portion of the Outboard Sections of each apertura lateralis.
6, according to the said electron gun of claim 1, it is characterized in that second electrode member comprises a plurality of vertical frame elements that are parallel to each other in vertical direction, and in the horizontal direction to be spaced from each other to set a distance, with the formation rectangular window, and each vertical frame element is near corresponding one in said one or more superimposed districts in a plurality of holes of first electrode member.
7, according to the said electron gun of claim 1, the common hole that it is characterized in that said each electrode assembly comprises an architrave, said architrave comprises that the periphery of common hole in the said electrode assembly extends the endless belt element and a chain link formula element of a distance, and it is superimposed each other and constitute single window that this chain link formula element has a plurality of holes.In the corresponding said electron beam in each hole corresponding one.
8,, it is characterized in that said each Kong Douwei has the garden shape of certain diameter, and the diameter of apertura lateralis is bigger than the diameter of medium pore according to the said electron gun of claim 4.
9, according to the said electron gun of claim 5, it is characterized in that said medium pore is roughly garden shape, each apertura lateralis all has a garden arc shape.
10,, it is characterized in that each said vertical frame element all defines by the width dimensions of horizontal direction with at the direction of principal axis gauge littler than width dimensions according to the said electron gun of claim 6.
11,, it is characterized in that each said vertical frame element all defines by the width dimensions of horizontal direction with at the direction of principal axis gauge bigger than width dimensions according to the said electron gun of claim 6.
12,, it is characterized in that said each vertical frame element all has a cavity towards said common hole according to the said electron gun of claim 6.
13, according to the said electron gun of claim 6, it is characterized in that a plurality of perpendicular elements of said second electrode member are coupled mutually with horizontal cell, to form fence formula quadrangle, said quadrangle is big in the size ratio size in the horizontal direction of vertical direction.
14,, it is characterized in that the bight of said rectangular window is covered by first electrode member at least in part at direction of principal axis according to the said electron gun of claim 6.
15, according to the said electron gun of claim 9, it is characterized in that said each electrode assembly comprises the pipe with the housing encirclement of a non-garden tubular, wherein the effective diameter of each apertura lateralis is partly defined by housing.
16,, it is characterized in that said cavity is substantially half ellipse garden shape according to the said electron gun of claim 12.
17,, it is characterized in that said cavity is substantially half garden shape according to the said electron gun of claim 12.
18, a kind of colour cathode-ray tube electron gun has axle, level and vertical direction parts, and said all directions parts are orthogonal substantially, and this electron gun comprises:
Produce the device of many electron beams, every corresponding corresponding colour cell that forms chromatic image of electron beam; With
The pair of electrodes device, they are symmetrical mutually substantially with respect to horizontal direction, coaxial at direction of principal axis and ray tube, and provide passage for said many electron beams, said this all has a common hole to each of electrode assembly, each common hole is relative with another, and spaced apart with given distance and another at direction of principal axis, and each electrode assembly comprises:
The architrave of the common hole of one close said electrode assembly, said architrave comprises that the periphery of common hole in the said electrode assembly extends the endless belt element and a chain link formula element of a segment length, and it is superimposed each other and constitute single window that this chain link formula element has a plurality of holes.In the corresponding said electron beam in each hole corresponding one and
In said electrode assembly and to give set a distance and the isolated control electrode plate of said architrave.
19, according to the said electron gun of claim 18, it is characterized in that said control electrode plate comprises a pair of vertical bar, they are parallel to each other in vertical direction, in the horizontal direction to give set a distance apart from one another by opening to form rectangular window, the corresponding congruent region in the hole that all close part of each vertical bar is superimposed.
20,, it is characterized in that said control electrode plate comprises that one has the plate in a plurality of holes of opening disconnected from each other, in the corresponding said electron beam in each hole corresponding one according to the said electron gun of claim 18.
21, according to the said electron gun of claim 18, the common hole that it is characterized in that said electrode assembly is a non-garden shape, and the size of its horizontal direction is bigger than the size of vertical direction.
22, according to the said electron gun of claim 18, each that it is characterized in that hole that said part is superimposed all is substantially garden shape.
23, according to the said electron gun of claim 18, it is characterized in that the superimposed hole of a plurality of parts of said first electrode member comprises a medium pore and pair of outside hole, each apertura lateralis is superimposed and bigger than medium pore with the medium pore part in the horizontal direction.
24,, it is characterized in that each said vertical bar all has a cavity towards said architrave according to the said electron gun of claim 19.
25,, it is characterized in that each said vertical bar all is bent to the angle of at least one nonzero value according to the said electron gun of claim 19.
26,, it is characterized in that said control electrode plate also comprises the horizontal frame element that is coupled with said a pair of vertical bar according to the said electron gun of claim 19.
27, according to the said electron gun of claim 23, it is characterized in that said each Kong Douwei has the garden shape of certain diameter, the diameter of apertura lateralis is bigger than the diameter of medium pore.
28, according to the said electron gun of claim 23, it is characterized in that said medium pore is roughly garden shape, each apertura lateralis all is an arc.
29,, it is characterized in that said cavity is substantially half ellipse garden shape according to the said electron gun of claim 24.
30,, it is characterized in that said cavity is substantially half garden shape according to the said electron gun of claim 24.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1494/1993 | 1993-02-04 | ||
| KR930001494 | 1993-02-04 | ||
| KR1494/93 | 1993-02-04 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1090679A true CN1090679A (en) | 1994-08-10 |
| CN1041362C CN1041362C (en) | 1998-12-23 |
Family
ID=19350376
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN93108482A Expired - Fee Related CN1041362C (en) | 1993-02-04 | 1993-07-26 | Electron gun for color cathode-ray tube |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JPH06243797A (en) |
| KR (1) | KR960016259B1 (en) |
| CN (1) | CN1041362C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR970060327A (en) * | 1996-01-30 | 1997-08-12 | 윤종용 | Electron gun for color cathode ray tube |
| KR20030089028A (en) * | 2002-05-15 | 2003-11-21 | 엘지.필립스디스플레이(주) | The Electron Gun For The C-CRT |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59215640A (en) * | 1983-05-23 | 1984-12-05 | Hitachi Ltd | Electron gun for color picture tube |
| JPH0675378B2 (en) * | 1989-11-08 | 1994-09-21 | 松下電子工業株式会社 | Electron gun for color picture tube |
-
1993
- 1993-07-26 CN CN93108482A patent/CN1041362C/en not_active Expired - Fee Related
- 1993-08-03 KR KR1019930015064A patent/KR960016259B1/en not_active IP Right Cessation
- 1993-11-18 JP JP5288995A patent/JPH06243797A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| KR940020455A (en) | 1994-09-16 |
| CN1041362C (en) | 1998-12-23 |
| KR960016259B1 (en) | 1996-12-07 |
| JPH06243797A (en) | 1994-09-02 |
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