CN1084523C - Color cathode ray tube - Google Patents
Color cathode ray tube Download PDFInfo
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- CN1084523C CN1084523C CN97112226A CN97112226A CN1084523C CN 1084523 C CN1084523 C CN 1084523C CN 97112226 A CN97112226 A CN 97112226A CN 97112226 A CN97112226 A CN 97112226A CN 1084523 C CN1084523 C CN 1084523C
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- 238000010894 electron beam technology Methods 0.000 claims abstract description 22
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 20
- 238000005266 casting Methods 0.000 claims description 11
- 210000001503 joint Anatomy 0.000 abstract 1
- 238000000576 coating method Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 8
- 238000003466 welding Methods 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 5
- 239000011248 coating agent Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000014509 gene expression Effects 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 241001062009 Indigofera Species 0.000 description 1
- 229910001374 Invar Inorganic materials 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
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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
- H01J29/02—Electrodes; Screens; Mounting, supporting, spacing or insulating thereof
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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
- H01J29/02—Electrodes; Screens; Mounting, supporting, spacing or insulating thereof
- H01J29/06—Screens for shielding; Masks interposed in the electron stream
- H01J29/07—Shadow masks for colour television tubes
- H01J29/073—Mounting arrangements associated with shadow masks
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- Electrodes For Cathode-Ray Tubes (AREA)
- Media Introduction/Drainage Providing Device (AREA)
Abstract
本发明公开一种彩色阴极射线管，与荧光屏相对设置的阴罩包括基本呈矩形的罩主体和罩支架，上述罩主体上开设有多个电子束通过孔，上述罩支架设有支承上述罩主体外缘部的4个侧壁，在侧壁中，位于长边一侧的侧壁包括中部接合部和一对凸部，该中部接合部位于沿其纵向的中部，与上述罩主体相接合，上述一对凸部沿其纵向设置于中部接合部的两侧，朝向离开上述罩主体的方向突出，各凸部在侧壁和罩主体之间构成空隙，各空隙的宽度沿离开中部接合部的方向逐渐增加。
The invention discloses a color cathode ray tube. The shadow mask arranged opposite to the fluorescent screen includes a substantially rectangular mask body and a mask bracket. The mask body is provided with a plurality of electron beam passing holes. The four side walls of the outer edge portion, among the side walls, the side wall on the side of the long side includes a middle engaging portion and a pair of protrusions, the middle engaging portion is located in the middle along its longitudinal direction, and engages with the above-mentioned cover main body, The above-mentioned pair of protrusions are arranged on both sides of the middle joint along its longitudinal direction, protruding toward the direction away from the above-mentioned cover main body, each protrusion forms a gap between the side wall and the cover main body, and the width of each gap is along the The direction gradually increases.
Description
The present invention relates to the mask color cathode ray tube.
In general, color cathode ray tube comprises rectangular substantially panel and shell, is provided with the shirt rim on the outer edge of effective portion of above-mentioned panel, and above-mentioned shell is made of the funnelform Taper Pipe (funnel) that engages with above-mentioned shirt rim.Inner surface in effective portion of above-mentioned panel is formed with the phosphor screen that is made of 3 look fluorescence coatings.In addition, be provided with shadow mask in fluorescent screen inside, this shadow mask is relative with phosphor screen.In the neck of Taper Pipe, be provided with the electron gun that to launch 3 electron beams.In addition, 3 electron beams that above-mentioned electron gun is launched, scan phosphor screen along level, vertical direction by shadow mask because of the magnetic field that arrangement for deflecting produced that is arranged at the Taper Pipe outside deflects, but just color display.
Above-mentioned shadow mask is used for 3 kinds of electron beams are selected, it comprises rectangular substantially cover main body and rectangular substantially cover stent, above-mentioned cover main body is formed with a plurality of electron beam through-holes in its part relative with phosphor screen, and above-mentioned cover stent is provided with sidewall, and this sidewall engages with above-mentioned cover main body.Above-mentioned shadow mask adopts following support pattern, this mode is: by the bight at cover stent the wedge shape elastic supporting piece is set, and this elastic supporting piece is connected with stud pin (stud pin) on the shirt rim that is arranged at above-mentioned panel, and this shadow mask supports removably.
Generally speaking, in color cathode ray tube,, must distinguish correctly by 3 electron beams that pass through the hole of the electron beam in the cover main body and shield on 3 look fluorescence coatings in order in phosphor screen, to show the image of no color differnece.For this reason, must guarantee that the relative panel of shadow mask is positioned at correct position.
But in recent years, along with multimedia development, in order to improve resolution, people have developed following color cathode ray tube, and the size of 3 look fluorescence coatings and its disposition interval (assortment pitch) reduce in this cathode ray tube.In above-mentioned color cathode ray tube, because screen deviation degree more than needed, the electron beam of relative 3 look fluorescence coatings reduces, so just require more correctly to carry out electron beam and screen than common color cathode ray tube.
; because in the past; shadow mask in the color cathode ray tube adopts the contacted structure of sidewall of the basic and cover stent of the whole outer rim of cover main body; like this because the factor of error in the cover stent manufacturing; can on the cover main body, produce undesirable active force, thereby the position of the relative panel of shadow mask can produce deviation.Particularly, in the ratio of width to height (ァ ス ペ ケ ト) that occurs in recent years is in the color cathode ray tube of 16:9, owing to compare with common color cathode ray tube, the length that is positioned at the sidewall of long limit one side in the cover stent substantially exceeds the length of the sidewall that is positioned at minor face one side, can produce insufficient strength like this, or relative spacing (along the spacing of short-axis direction) the generation deviation between the sidewall of long limit one side, and then the cover main body is easy to produce distortion.
In addition, also following situation can occur, promptly in the manufacture process of color cathode ray tube, repeatedly shadow mask be carried out field-strip, like this owing to when this field-strip, act on the effect of the power of shadow mask, can make cover main body generation warpage, thereby make the cover main body produce distortion.Consequently, relative 3 look fluorescence coating electron beams to shield and are departed from.
In the pairing color cathode ray tube of multimedia that reduces of degree more than needed of screen with relative 3 look fluorescence coating electron beams, position deviation for the shadow mask that reduces to cause because of external impact, must alleviate the weight of the cover stent that accounts for the most of weight of shadow mask, so that alleviate the burden of elastic supporting piece.
But, if reduce the weight of cover stent, then because external impact, or the effect of the active force that produces during field-strip, cover stent can produce distortion, thus the position of panel shadow mask is easy to depart from relatively.
In addition, though when cover main body panel reduced thickness, can make as size, the shape of electron beam through-hole that causes phosphor screen to produce the main cause of spot (む ら) and be consistent, if but cover main body panel reduced thickness, then can produce intensity and reduce, the situation that cover main body itself deforms easily.
So people have developed following color cathode ray tube, this color cathode ray tube adopts the shadow mask with relatively low thermel expansion, this shadow mask is made by dilval (invar), this dilval has bigger inhibitory action to the mobile of electron beam, and the mobile of above-mentioned electron beam is that the so-called vault (doming) that is expanded towards the phosphor screen direction by shadow mask generation thermal expansion produces.As preventing the above-mentioned measure that the relatively low thermel expansion shadow mask produces distortion that has, the flat 5-121009 document of TOHKEMY has proposed a kind of shadow mask, and this shadow mask is provided with outstanding toward the outer side a plurality of protuberances on the sidewall of its cover stent.Even but be provided with the occasion of raised part, because contacting of cover main body and cover stent is the face contact, like this owing to the error in the cover stent manufacturing, or cover stent produces distortion in the color cathode ray tube manufacture process, thus the cover main body can deform.
In the manner described above, in order on phosphor screen, to show the image that does not have colour cast, though the design of cover stent is very important, in existing shadow mask, cover main body or cover stent can produce distortion, can produce the problem that can not show the image with good quality like this.
Of the present inventionly propose for addressing the above problem, the object of the present invention is to provide a kind of color cathode ray tube, it can effectively be controlled the distortion of cover main body or cover stent, thereby shows the image with good quality.
To achieve these goals, the present invention takes following technical scheme:
A kind of color cathode ray tube, it comprises:
Vacuum casting, this vacuum casting comprise panel and infundibulate Taper Pipe,
This panel has rectangular substantially effective portion and shirt rim, and the inner surface of above-mentioned effective portion is formed with phosphor screen, and above-mentioned shirt rim is arranged at the outer edge of above-mentioned panel, above-mentioned infundibulate Taper Pipe and shirt rim tabling;
Shadow mask, this shadow mask is arranged at above-mentioned enclosure, and relative with above-mentioned phosphor screen;
Elastic supporting piece, it is supported on above-mentioned shadow mask on the above-mentioned shirt rim with elastic type;
Above-mentioned shadow mask comprises the cover stent of cover main body and rectangular substantially frame, and above-mentioned cover main body comprises rectangular substantially effective portion that offers a plurality of electron beam through-holes and the shirt rim that forms in the outer edge of this effective portion,
Above-mentioned cover stent has 4 sidewalls of the shirt rim of the above-mentioned cover main body of supporting, it is characterized in that:
Above-mentioned at least two relative sidewalls comprise junction surface, middle part, pair of end junction surface and a pair of protuberance, this junction surface, middle part be arranged at along this sidewall longitudinally in the middle part of, and with the shirt rim tabling of above-mentioned cover main body; Above-mentioned pair of end junction surface is arranged at respectively along above-mentioned sidewall two ends longitudinally, and engages with the shirt rim of above-mentioned cover main body; Above-mentioned a pair of protuberance vertically is arranged at the both sides at above-mentioned junction surface along above-mentioned sidewall, and it is outstanding to the direction of leaving above-mentioned cover main body, the width of each protuberance increases gradually from junction surface, above-mentioned middle part to the direction at end junction surface, junction surface, middle part at the longitudinal direction middle part, and have maximum between the end junction surface.
At junction surface, above-mentioned middle part and the spacing between the sidewall of minor face one side is the occasion of L, the space between junction surface, above-mentioned middle part and engaged at end portion along sidewall longitudinally length be 0.7～0.9L.
A kind of color cathode ray tube, it comprises:
Vacuum casting, this vacuum casting comprise panel and infundibulate Taper Pipe, and this panel has base
Effective portion and shirt rim that this is rectangular, the inner surface of above-mentioned effective portion is formed with fluorescence
Screen, above-mentioned shirt rim is arranged at the outer edge of above-mentioned panel, above-mentioned infundibulate Taper Pipe and skirt
The limit tabling;
Shadow mask, this shadow mask is arranged at above-mentioned enclosure, and
Relative with above-mentioned phosphor screen;
Elastic supporting piece, it is supported on above-mentioned shadow mask on the above-mentioned shirt rim with elastic type;
Above-mentioned shadow mask comprises the cover stent of cover main body and rectangular substantially frame, and above-mentioned cover main body comprises rectangular substantially effective portion that offers a plurality of electron beam through-holes and the shirt rim that forms in the outer edge of this effective portion,
Above-mentioned cover stent has 4 sidewalls of the shirt rim of the above-mentioned cover main body of supporting, it is characterized in that:
Above-mentioned at least 2 relative sidewalls comprise:,
The junction surface, middle part is arranged at along this sidewall middle part longitudinally, and with the shirt rim tabling of above-mentioned cover main body;
The pair of end junction surface is arranged at respectively along above-mentioned sidewall two ends longitudinally, and engages with the shirt rim of above-mentioned cover main body;
Inter-engagement portion, this inter-engagement portion is positioned at above-mentioned central junction surface and respectively holds between the junction surface, and respectively with the shirt rim tabling of above-mentioned cover main body;
A pair of the 1st protuberance, between junction surface, above-mentioned middle part and inter-engagement portion, outstanding to the direction of leaving above-mentioned cover main body;
A pair of the 2nd protuberance lays respectively between above-mentioned inter-engagement portion and the engaged at end portion, and outstanding to the direction of leaving above-mentioned cover main body;
Above-mentioned each the 1st protuberance constitutes following space, the width in this space increases continuously gradually from junction surface, above-mentioned middle part to inter-engagement portion, above-mentioned each the 2nd protuberance constitutes following space, and the width in this space increases continuously gradually from above-mentioned inter-engagement portion to engaged at end portion.
Good effect of the present invention:
According to color cathode ray tube with said structure, because the cover stent in the shadow mask is provided with the protuberance that is formed on the sidewall, can improve the overall mechanical strength of sidewall and cover stent like this, can reduce the distortion of cover stent and the distortion of the cover main body that causes because of this distortion.Thus, the position deviation of may command shadow mask relative fluorescence screen can show the image with good quality.
In addition,, can reduce the contact area between them like this, can reduce the scale error of cover stent, or factor such as cover stent distortion causes the influence to the cover main body owing between the sidewall of cover stent and cover main body, be formed with the space.
In addition, in the manner described above, can correctly keep the shape of cover stent, or the relative correct fixed cover main body of cover stent, departing from of screen thereby can reduce electron beam, this departs from is because the relative cover stent of cover main body produces position deviation, or the distortion of the cover main body that causes of cover stent distortion produces.
Following with reference to accompanying drawing, describe embodiments of the invention in detail:
The color cathode ray tube of Fig. 1～4 expression the present invention the 1st embodiment;
Fig. 1 is the profile of above-mentioned color cathode ray tube;
Fig. 2 is the electron gun of color cathode ray tube of expression in a schematic way, shadow mask, fluoroscopic perspective view;
Fig. 3 A is the plane graph of above-mentioned shadow mask; Fig. 3 B is the profile along IIIB-IIIB line among Fig. 3 A;
Fig. 4 is the plane enlarged drawing of the sidewall of above-mentioned shadow mask;
Fig. 5 A～5C is respectively the plane graph of conversion embodiment of the sidewall of above-mentioned shadow mask;
Fig. 6 A is the shadow mask plane graph of the present invention the 2nd embodiment;
Fig. 6 B is the profile along VIB-VIB line among Fig. 6 A;
Fig. 7 A is the shadow mask plane graph of the present invention the 3rd embodiment;
Fig. 7 B is the profile along VIIB-VIIB line among Fig. 6 A;
Fig. 8 A is the shadow mask plane graph of the present invention the 4th embodiment;
Fig. 8 B is the profile along VIIIB-VIIIB line among Fig. 8 A.
Color cathode ray tube to embodiments of the invention specifically describes with reference to the accompanying drawings.
As illustrated in fig. 1 and 2, color cathode ray tube is provided with the vacuum casting 10 that is formed by glass.This vacuum casting 10 is made of panel 3 and infundibulate Taper Pipe (funnel) 4, and this panel 3 has rectangular substantially effective portion 1 and is arranged at shirt rim 2 on the outer edge of this effective portion 1, above-mentioned infundibulate Taper Pipe 4 and above-mentioned shirt rim 2 tablings.The inner face of the effective portion 1 in panel 3 is provided with following phosphor screen 5, and this phosphor screen 5 be by can launching indigo plant, 3 look fluorescence coating 20B of the striated of green and red light, and 20G, 20R, and the striated light shielding layer 23 that is formed between these fluorescence coatings constitutes.In addition, be provided with the shadow mask 21 that will describe the back in above-mentioned vacuum casting 10 inside, this shadow mask 21 is relative with phosphor screen 5.
But the inside of the neck 7 in Taper Pipe 4 is provided with the electron gun 9 of divergent bundle 8.In addition, can make 3 electron beam 8 deflections of electron gun 9 ejaculations by following magnetic field, this magnetic field is that the arrangement for deflecting 11 that is arranged at infundibulate Taper Pipe 4 outsides produces, and by along level, vertical direction phosphor screen 5 being scanned, can demonstrate coloured image by shadow mask 21.
Shown in Fig. 1～Fig. 3 B, shadow mask 21 comprises rectangular substantially cover main body 27, and the cover stent 30 that supports above-mentioned cover main body 27.This cover main body 27 comprises rectangular substantially effective 27a of portion and shirt rim 26, and this effective 27a of portion is relative with above-mentioned phosphor screen 5, and offers a plurality of electron beam through-holes 25, and above-mentioned shirt rim 26 is formed at the outer edge of above-mentioned effective 27a of portion.Above-mentioned cover stent 30 is rectangular substantially, and it comprises the pair of sidewalls 28L and the pair of sidewalls 28S that is positioned at shorter lateral sides of such that is positioned at than long side.In addition, above-mentioned cover main body 27 supports by the mode that the shirt rim 26 of inciting somebody to action wherein is welded on the cover stent 30.
In the sidewall of cover stent 30, the above-mentioned a pair of sidewall 28L that is positioned at than long side constitutes in the following manner, this mode is: this sidewall 28L is according to along its middle part and two ends engage with covering main body with shirt rim 26 contacted modes in the cover main body 27 longitudinally along it longitudinally, and has not and the shirt rim 26 contacted parts of covering in the main body 27.
Specifically, as Fig. 3 A, 3B, with shown in Figure 4, each sidewall 28L keeps the symmetrical manner bending about with the minor axis V of relative cover stent 30, along its longitudinally the middle part and along its longitudinally two ends be formed with respectively with above-mentioned cover main body 27 in shirt rim 26 contacted middle part junction surface 32a, and pair of end portions junction surface 32b.In addition, be formed with wedge shape protuberance 34 in the both sides of above-mentioned middle part junction surface 32a, this protuberance 34 is outstanding towards the direction of leaving cover main body 27.At the spacing d between the pair of sidewalls 28L at protuberance 34 places greater than the spacing dv between the pair of sidewalls 28L at minor axis V place, and near the spacing ds between the pair of sidewalls 28L of the sidewall 28S of shorter lateral sides of such.
In addition, in the shirt rim 26 in cover main body 27, its long leg branch is positioned at cover stent 30 inboards according to junction surface, middle part 32a and the engaged at end portion contacted mode of 32b with corresponding sidewall 28L, and fixing with above-mentioned middle part junction surface 32a and the 32b of engaged at end portion welding.Under above-mentioned state, between each sidewall 28L and cover main body 27, be formed with a pair of space 36 that limits by protuberance 34 respectively, this space 36 is positioned at the both sides of middle part junction surface 32a.Each space 36 is wedge shape, and its width increases towards the 32b of engaged at end portion gradually from junction surface, middle part 32a.
The Breadth Maximum W in each space 36 is about 1～3mm, and the spacing between minor axis V and sidewall 28S is the occasion of L, along the sidewall 28L length L 1=0.7 in space 36～0.9L longitudinally.
The length that is arranged in the shirt rim 26 of minor face one side in the cover main body 27 equals the length that cover stent 30 is positioned at the sidewall 28S of minor face one side substantially, and this shirt rim 26 contacts with the inboard of this sidewall 28S, and fixing in many places and sidewall 28S welding.
As shown in Figure 1, the shadow mask 21 of Gou Chenging removably is supported on the panel 3 by following manner in the manner described above, and this mode is: the elastic supporting piece that is wedge shape substantially 15 that is fixed in the bight place of cover stent 30 is connected on the stud pin (stud pin) 16 on the shirt rim 2 that is based in panel 3.In addition, in Fig. 1, label 22 expressions are arranged at the internal magnetic field shield on the shadow mask 21.
If adopt color cathode ray tube with said structure, owing to be formed with protuberance 34 on the sidewall 28L in the cover stent 30, thus can improve the mechanical strength of cover stent 30.So the applied external force of relativity on shadow mask 21 can prevent that this cover 21 from producing distortion, and can effectively reduce the site error of shadow mask 21 relative panels 3.Particularly in the ratio of width to height (aspect) is 16: 9 color cathode ray tube, compare with common color cathode ray tube, though increase greatly owing to be positioned at the sidewall length of long limit one side in the cover stent, thereby can cause insufficient strength or the relative interval between the sidewall of long limit one side to produce deviation, and then the cover main body is easy to generate distortion, but, can prevent effectively that like this shadow mask from producing distortion because shadow mask 21 constitutes in the manner described above.
In addition, owing to be formed with protuberance 34 on the sidewall 28L in cover stent 30, between cover main body 27 and sidewall 28L, be formed with space 36 like this.So sidewall 28L only contacts with cover main body 27 by junction surface, middle part 32a and the 32b of engaged at end portion, therefore compared with the prior art can reduce the contact area between cover stent 30 and the cover main body 27 greatly.Consequently can reduce to produce, act on the undesirable active force on the cover main body 27 owing to error that cover stent 30 is made.Particularly since can be correctly only to the spacing of the contact portion between cover stent 30 and the cover main body 27, i.e. dv, ds controls, and can reduce to cover the distortion of main body 27 like this, can prevent effectively that shadow mask 21 relative panels 3 from departing from.Therefore, can reduce to constitute the deviation that fluoroscopic 3 look fluorescence coating electron beams screen relatively, can show image with good quality.
Have again,, can strengthen cover stent 30 like this owing to be formed with protuberance 34, thereby can obtain following effect, promptly alleviate the weight of cover stent, reduce the burden of elastic supporting piece 15, in addition, even under the thin situation in the back of the panel that covers main body 27, still can prevent its distortion.
In the above-described embodiments, though the sidewall 28L in the cover stent 30 adopts following structure, this structure is: the space 36 that it has wedge shape protuberance 34 and is formed by this protuberance, if but sidewall 28L adopts following shape, promptly middle part and two ends contact with covering main body 27 longitudinally along it, then the shape in protuberance 34 and space 36 can be carried out multiple conversion as required.
Such as, if adopt the conversion embodiment shown in Fig. 5 A, each protuberance 34 is rectangular substantially, and space 36 forms in the following manner, this mode is: the width that only is positioned at the end 36a of middle part junction surface 32a one side increases towards the 32b of engaged at end portion gradually from junction surface, middle part 32a, and the maintenance of the width of the remainder in the space 36 is constant.
If adopt the conversion embodiment shown in Fig. 5 B, then each protuberance 34 is rectangular, and it is constant that the width of space 36 gamut longitudinally keeps.
In addition, if adopt the conversion embodiment shown in Fig. 5 C, each protuberance 34 and space 36 are the wedge shape opposite with previous embodiment.That is, protuberance 34 and space 36 form in the following manner, and promptly in the width maximum near the end of junction surface, middle part 32a one side, and the width in raised part 34 and space 36 reduces gradually towards the 32b of engaged at end portion.
Fig. 6 A and Fig. 6 B represent the shadow mask 21 in the color cathode ray tube of the present invention the 2nd embodiment.When adopting the 2nd embodiment, in cover stent 30,, and on the sidewall 28S that is positioned at minor face one side, all be formed with a pair of protuberance 40 at the sidewall 28L that is positioned at long limit one side.In addition, each sidewall 28S all constitutes in the following manner, this mode is: by only along its middle part and along its shirt rim 26 contacted mode sidewall 28S and cover main body tabling in two ends and the cover main body 27 longitudinally longitudinally, this sidewall 28S have not with cover main body 27 in shirt rim 26 contacted parts.
In other words, each sidewall 28S keeps the mode of left and right symmetry bending with the major axis H of relative cover stent 30, along its longitudinally the middle part and along its longitudinally two ends be formed with respectively with cover main body 27 in shirt rim 26 contacted middle part junction surface 42a, and pair of end portions junction surface 42b.Be formed with wedge shape protuberance 40 in the both sides of junction surface, middle part 42a in addition, this protuberance 40 is outstanding towards the direction of leaving cover main body 27.In the spacing between the pair of sidewalls 28S at protuberance 40 places greater than the spacing between the pair of sidewalls 28S at major axis H place, and near the spacing between the pair of sidewalls 28S of the sidewall 28L of long limit one side.
In addition, in the shirt rim 26 in cover main body 27, short side part with corresponding sidewall 28S in junction surface, middle part 42a and the engaged at end portion contacted state of the 42b inboard that is positioned at cover stent 30, and fixing with junction surface, middle part 42a and the 42b of engaged at end portion welding.Between each sidewall 28S and cover main body 27, be formed with a pair of space of determining by protuberance 40 respectively 44 in addition, this space 44 is positioned at the both sides of middle part junction surface 42a.Each space 44 is wedge shape, and the width in this space increases towards the 42b of engaged at end portion gradually from junction surface, middle part 42a.
Other structure among above-mentioned the 2nd embodiment is identical with aforesaid the 1st embodiment's.
According to the 2nd embodiment,, so not only can further improve the mechanical strength of cover stent 30, but also can further reduce to cover the contact area between main body 27 and the cover stent 30 owing on the sidewall 28S of minor face one side, also be provided with protuberance 40 with said structure.Therefore, can further reduce to cover the distortion of main body 27, effectively prevent the position deviation of shadow mask 21 relative panels 3.
Fig. 7 A and Fig. 7 B represent the shadow mask 21 in the color cathode ray tube of the present invention the 3rd embodiment.When adopting the 3rd embodiment, be formed with 4 protuberances 34 on sidewall 28L in cover stent 30 and the 28S respectively.That is, on each sidewall 28L, forming minor axis is the protuberance 34 that two left and right sides V in center keep symmetry.In addition, above-mentioned sidewall 28 is provided with middle part junction surface 32a and the 32b of engaged at end portion, and is positioned at these junction surfaces 32a, the 32c of inter-engagement portion between the 32b, and this sidewall 28L is fixing with shirt rim 26 welding in the cover main body 27 by these 5 junction surfaces.In addition, be formed with 4 spaces 36 being determined by protuberance 34 between sidewall 28L and shirt rim 26, each space is wedge shape, and its width increases towards the 32b of engaged at end portion gradually from junction surface, middle part 32a one side.
Equally, on sidewall 28S, keep mode of left and right symmetry to form protuberance 40 with per two relative major axis H.In addition, above-mentioned sidewall 28S also has and is positioned at these junction surfaces 42a except having middle part junction surface 42a and the 42b of engaged at end portion, the 42c of inter-engagement portion between the 42b, and this sidewall 28S is fixing with shirt rim 26 welding in the cover main body 27 by these 5 junction surfaces.Also have, be formed with 4 spaces 36 determining by protuberance 40 between sidewall 28S and shirt rim 26, each space is wedge shape, and its width increases towards the 42b of engaged at end portion gradually from junction surface, middle part 42a one side.
If adopt the 3rd embodiment with said structure, owing to be formed with protuberance 34,40, can further strengthen cover stent 30, even be subjected at shadow mask 21 under the situation of external impact, still can this impulsive force be scatter according to the quantity of protuberance.Also can obtain effect and the effect identical with the 2nd embodiment in addition with the 1st embodiment.
Fig. 8 A and Fig. 8 B represent the shadow mask 21 in the color cathode ray tube of the present invention the 4th embodiment.When adopting the 4th embodiment, a pair of middle part that is positioned at the sidewall 28L of long limit one side in cover stent 30 is formed with a protuberance 34, and this protuberance 34 relative minor axis V keep symmetry.This protuberance 34 along its longitudinally the width of gamut keep constant.Thus, the spacing d between the pair of sidewalls 28L at protuberance 34 places, and the spacing dv between the sidewall 28L at minor axis V place keeps equating that the inner surface of protuberance 34 is the linearity with infinitely great curvature.
Above-mentioned relatively cover stent 30, the curved shape of long leg in the cover main body 27, its sidewall 28L one in cover stent 30 is side-prominent.Thus, sidewall 28L is only by being arranged in the middle middle part 32a that locates longitudinally of protuberance 34, and the pair of end portions junction surface 32b that is arranged in the boundary of protuberance and sidewall contacts with the shirt rim 26 that cover main body 27 is positioned at long limit one side, and fixes by these junction surfaces and shirt rim welding.In addition, be formed with space 36 respectively in the both sides of junction surface, middle part 32a, this space 36 is wedge shape, and its width increases gradually towards the 32b of engaged at end portion.
In addition, equally in above-mentioned shadow mask 21, cover is arranged in the equal in length that the basic and cover stent 30 of the length of shirt rim 26 of minor face one side is positioned at the sidewall 28S of minor face one side in the main body 27, and above-mentioned shirt rim 26 is positioned at the inboard of this sidewall 28S, and it is fixed by a plurality of pads.
Claims (3)
1. color cathode ray tube, it comprises:
Vacuum casting (10), this vacuum casting comprise panel (3) and infundibulate Taper Pipe (4),
This panel (3) has rectangular substantially effective portion (1) and shirt rim (2), and the inner surface of above-mentioned effective portion is formed with phosphor screen (5), and above-mentioned shirt rim (2) are arranged at the outer edge of above-mentioned panel (3), above-mentioned infundibulate Taper Pipe (4) and shirt rim (2) tabling;
Shadow mask (21), this shadow mask (21) are arranged at above-mentioned shell (10) inside, and relative with above-mentioned phosphor screen (5);
Elastic supporting piece (15), it is supported on above-mentioned shadow mask (21) on the above-mentioned shirt rim (2) with elastic type;
Above-mentioned shadow mask (21) comprises the cover stent (30) of cover main body (27) and rectangular substantially frame, above-mentioned cover main body (27) comprises rectangular substantially effective portion (27a) that offers a plurality of electron beam through-holes (25) and the shirt rim (26) that forms in the outer edge of this effective portion
Above-mentioned cover stent (30) has 4 sidewalls of the shirt rim (26) of the above-mentioned cover main body of supporting (27), it is characterized in that:
Above-mentioned at least two relative sidewalls comprise the junction surface, middle part (32a, 42a), the pair of end junction surface (32b, 42b) and a pair of protuberance (34,40), this junction surface, middle part (32a 42a) is arranged at along this sidewall middle part longitudinally, and with shirt rim (26) tabling of above-mentioned cover main body; (34b 40b) is arranged at respectively along above-mentioned sidewall two ends longitudinally, and chimeric with the shirt rim (26) of above-mentioned cover main body at above-mentioned pair of end junction surface; Above-mentioned a pair of protuberance (34,40) vertically be arranged at the both sides at above-mentioned junction surface along above-mentioned sidewall, and it is outstanding to the direction of leaving above-mentioned cover main body, the width of each protuberance is from above-mentioned middle part junction surface (32a, 42a) to the end junction surface (32b, direction 42b) increases gradually, junction surface, the middle part (32a at longitudinal direction middle part, 42a) and (32b has maximum between 42b) at the end junction surface.
2. color cathode ray tube according to claim 1 is characterized in that:
At junction surface, above-mentioned middle part and the spacing between the sidewall of minor face one side is the occasion of L, the space between junction surface, above-mentioned middle part and engaged at end portion along sidewall longitudinally length be 0.7～0.9L.
3. color cathode ray tube, it comprises:
Vacuum casting, this vacuum casting comprises panel (3) and infundibulate Taper Pipe (4), this panel (3) has rectangular substantially effective portion (1) and shirt rim (2), the inner surface of above-mentioned effective portion is formed with phosphor screen (5), above-mentioned shirt rim (2) is arranged at the outer edge of above-mentioned panel (3), above-mentioned infundibulate Taper Pipe (4) and shirt rim (2) tabling; Shadow mask (21), this shadow mask (21) are arranged at above-mentioned shell (10) inside, and relative with above-mentioned phosphor screen (5);
Elastic supporting piece (15), it is supported on above-mentioned shadow mask (21) on the above-mentioned shirt rim (2) with elastic type;
Above-mentioned shadow mask (21) comprises the cover stent (30) of cover main body (27) and rectangular substantially frame, above-mentioned cover main body (27) comprises rectangular substantially effective portion (27a) that offers a plurality of electron beam through-holes (25) and the shirt rim (26) that forms in the outer edge of this effective portion
Above-mentioned cover stent (30) has 4 sidewalls of the shirt rim (26) of the above-mentioned cover main body of supporting, it is characterized in that:
Above-mentioned at least 2 relative sidewalls comprise:,
The junction surface, middle part (32a 42a), is arranged at along this sidewall middle part longitudinally, and with shirt rim (26) tabling of above-mentioned cover main body;
(32b 42b), is arranged at respectively along above-mentioned sidewall two ends longitudinally, and chimeric with the shirt rim (26) of above-mentioned cover main body at the pair of end junction surface;
Inter-engagement portion (32c, 42c), this inter-engagement portion (32c, 42c) be positioned at above-mentioned central junction surface (32a, 42a) and each end junction surface (32b, 42b) between, and respectively with shirt rim (26) tabling of above-mentioned cover main body;
A pair of the 1st protuberance, between junction surface, above-mentioned middle part and inter-engagement portion, outstanding to the direction of leaving above-mentioned cover main body;
A pair of the 2nd protuberance lays respectively between above-mentioned inter-engagement portion and the engaged at end portion, and outstanding to the direction of leaving above-mentioned cover main body;
Above-mentioned each the 1st protuberance constitutes following space, the width in this space increases continuously gradually from junction surface, above-mentioned middle part to inter-engagement portion, above-mentioned each the 2nd protuberance constitutes following space, and the width in this space increases continuously gradually from above-mentioned inter-engagement portion to engaged at end portion.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP183160/96 | 1996-07-12 | ||
| JP18316096 | 1996-07-12 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1170952A CN1170952A (en) | 1998-01-21 |
| CN1084523C true CN1084523C (en) | 2002-05-08 |
Family
ID=16130854
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN97112226A Expired - Fee Related CN1084523C (en) | 1996-07-12 | 1997-07-14 | Color cathode ray tube |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP0818800B1 (en) |
| KR (1) | KR100239244B1 (en) |
| CN (1) | CN1084523C (en) |
| DE (1) | DE69709257T2 (en) |
| MY (1) | MY118882A (en) |
| TW (1) | TW388050B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1230860C (en) * | 1999-12-27 | 2005-12-07 | 松下电器产业株式会社 | Cathode ray tube |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4949009A (en) * | 1988-02-03 | 1990-08-14 | Mitsubishi Denki Kabushiki Kaisha | Shadow mask mounting system for a color cathode ray tube |
| JPH05121009A (en) * | 1991-10-25 | 1993-05-18 | Nec Corp | Color picture tube |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2420205A1 (en) * | 1978-03-13 | 1979-10-12 | Videocolor Sa | MASK TUBE FOR COLOR TELEVISION |
-
1997
- 1997-07-08 TW TW086109604A patent/TW388050B/en not_active IP Right Cessation
- 1997-07-08 DE DE69709257T patent/DE69709257T2/en not_active Expired - Fee Related
- 1997-07-08 EP EP97111545A patent/EP0818800B1/en not_active Expired - Lifetime
- 1997-07-09 MY MYPI97003115A patent/MY118882A/en unknown
- 1997-07-11 KR KR1019970033552A patent/KR100239244B1/en not_active IP Right Cessation
- 1997-07-14 CN CN97112226A patent/CN1084523C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4949009A (en) * | 1988-02-03 | 1990-08-14 | Mitsubishi Denki Kabushiki Kaisha | Shadow mask mounting system for a color cathode ray tube |
| JPH05121009A (en) * | 1991-10-25 | 1993-05-18 | Nec Corp | Color picture tube |
Also Published As
| Publication number | Publication date |
|---|---|
| DE69709257D1 (en) | 2002-01-31 |
| MY118882A (en) | 2005-02-28 |
| DE69709257T2 (en) | 2002-08-14 |
| CN1170952A (en) | 1998-01-21 |
| KR100239244B1 (en) | 2000-01-15 |
| EP0818800B1 (en) | 2001-12-19 |
| EP0818800A1 (en) | 1998-01-14 |
| TW388050B (en) | 2000-04-21 |
| KR980011627A (en) | 1998-04-30 |
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