CN1068975C - Reed of gas eliminating agent and cathod adopting said reed - Google Patents
Reed of gas eliminating agent and cathod adopting said reed Download PDFInfo
- Publication number
- CN1068975C CN1068975C CN95119169A CN95119169A CN1068975C CN 1068975 C CN1068975 C CN 1068975C CN 95119169 A CN95119169 A CN 95119169A CN 95119169 A CN95119169 A CN 95119169A CN 1068975 C CN1068975 C CN 1068975C
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- Prior art keywords
- getter
- reed
- container
- crt
- place
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J43/00—Secondary-emission tubes; Electron-multiplier tubes
- H01J43/04—Electron multipliers
- H01J43/06—Electrode arrangements
- H01J43/18—Electrode arrangements using essentially more than one dynode
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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
- H01J29/94—Selection of substances for gas fillings; Means for obtaining or maintaining the desired pressure within the tube, e.g. by gettering
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J7/00—Details not provided for in the preceding groups and common to two or more basic types of discharge tubes or lamps
- H01J7/14—Means for obtaining or maintaining the desired pressure within the vessel
- H01J7/18—Means for absorbing or adsorbing gas, e.g. by gettering
- H01J7/186—Getter supports
Abstract
So as to provide a getter spring which applies less heat to a CRT assembly, i.e., a funnel glass of a CRT in a getter flash process carried out when the CRT is manufactured, a container 15 for storing a getter (92) is connected to a spring member 16 by fixing e.g. welding the container 15 on the spring member 16 at one position 41 and bringing the container 15 into contact with the spring member 16 at another position 23 whereby an amount of a heat conducted to the spring member upon effecting a getter flash process is reduced.
Description
The cathode ray tube (CRT) that the present invention relates to a kind of getter reed (getter spring) and use the getter reed.
Cathode ray tube is widely used in the display device and the similar devices of TV receiving apparatus, computer.
The inside of described CRT is maintained under the high vacuum state.Realize condition of high vacuum degree by the getter that when making described CRT, the carries out operation of evapotranspiring.
The described getter operation of evapotranspiring is to carry out later on for produce the deairing step that vacuum carries out at described CRT component inside when making described CRT.In described getter evapotranspires operation, mainly constitute and the getter that is placed in advance among the described CRT is heated by the high-frequency heating (i.e. the eddy current that is used to heat the described latter that produces in described getter place) from described CRT member outside by barium metal Ba.When the metal condensation that is vaporized, will be absorbed in residual gas in the described CRT member, thereby increase the level of vacuum in the described CRT member, to obtain high vacuum.In described getter evapotranspired operation, the metal that is vaporized can be caught and be remained in the described CRT member such as some material of dust etc., and the material that is vaporized is dropped on the inside surrounded surface of described CRT member funnel.
Getter reed has one and is fixed in the end parts at the electron gun place that is included within the described CRT and extends along the inboard skewed surface of described funnel.Described getter reed plays support and holds the body effect, is used for supporting a container that is used for installing (holding) described getter at its tip portion.
Figure 1A shows a getter reed 81 to Fig. 1 D.Fig. 2 A shows a container 15 and the described getter reed 81 that is used to support described container 15 to Fig. 2 D.
Described getter reed 81 is by having certain intensity, the good heat resistanceheat resistant performance and the suitable material of electric conductivity, and promptly SUS304 (spring material) makes.And described container 15 is by the material that can tolerate the high temperature that is produced in getter evapotranspires the operation process, and promptly SUS304 makes.
Figure 1A shows the front view of undressed described getter reed 81.Shown in Figure 1A, described getter reed 81 is cruciform shape.Described getter reed 81 has strip part and billet shape part 81C who is made of strip part 81a, 81b.The total length of described strip part 81a and 81b extends about 118mm in the horizontal direction shown in Figure 1A, and described billet shape part 81C extends at the longitudinal component shown in Figure 1A, promptly extends about 22mm along line D-D ＇.82 places are divided into strip part 81a, 81b to described strip part in the position, and use an insulating component 21 that it is interconnected, and this will describe in the back.
Figure 1B is the end view of described getter reed 81 rectangular part 81a.Shown in Figure 1B, when described getter reed 81 was positioned on the described CRT infundibular body inboard, described strip part 81a was by crooked so that its inclined surface extension along described funnel part gradually.Shown in Figure 1B, described getter reed 81 is in a plurality of bends office, and promptly 6 position I, II, III, IV, V and VI places are by crooked 10 °, 20 °, 20 °, 20 °, 15 ° and 12 ° respectively.
Fig. 1 C at length shows the fore-end (by the part shown in the broken circle among Figure 1B) of described strip part 81a.Shown in Fig. 1 C, described front end has the curved portion 83 of a spoon shape, and its bossing contacts with the inner conductive plated film of CRT funnel part shown in Figure 3.Described curved portion 83 is cochlear, so that described convex part is in contact with one another reliably with described inner conductive plated film.In addition, described cochlear curved portion 83 can prevent that also described inner conductive plated film is damaged.
The billet shape part 81C of described cruciform shape getter reed 81 has curved portion 84a, the 84b that forms at each respective end place shown in Fig. 1 D, and described Fig. 1 D at length shows described billet shape part 81c.Described curved portion 84a, 84b have a convex surface separately reliably to contact with described inner conductive plated film 8.
Shown in Fig. 2 A, 2B, described container 15 place's shapes and have one and are used for thereon the groove (recessed portion) 91 that (or within it) installs (or depositing) getter 92 in the form of a ring.The perspective view of Fig. 2 B has shown thereon (or within it) (or depositing) has been installed described container 15 of described getter 92.
Two curved portion 84a, the 84b of described getter reed 81 billet shape part 81c and the basal surface 15a of described container 15 are meshing with each other, and (or in it) installs (or depositing) described getter 92 with thereon.Shown in Fig. 2 C, utilization is welded on position 93a, the 93b place is connected to described container 15 on the described getter 92.Therefore, when described getter reed 81, insulating material 21 and container 15 are assembled into a time-out, its member configuration is shown in Fig. 2 D.
Fig. 3 is a simple cutaway view, shows described component sets is put into mode among the described CRT.Described getter reed 81 has an end that is connected with electron gun 2 interior deflector battery lead plate 3b.The described getter reed 81 that utilizes described insulation board 21 to connect extends along the inboard skewed surface of described funnel part with described inboard skewed surface with being separated by a distance.The convex surface place of the curved portion that provides in the place, two ends of the top end of described strip part 81a and described billet shape part 81c only, described getter reed 81 just is in contact with one another with the internal conductive coatings 8 of described funnel part.
Described getter reed 81 is made by described spring material and is had a resilience.In addition, by the angle of the formed total angle of a plurality of sweeps greater than described funnel part inner inclination part.Therefore, when described getter reed 81, when the described interior deflector battery lead plate 3b that insulating material 21 and container 15 formed members are installed to described CRT electron gun goes up, except the bossing of the curved portion 83 at the head portion of the described strip part 81a that has only described getter reed 81 and described billet shape part 81c two ends, 84a, 84b with described inner conductive plated film 8 contacts, described getter reed 81 is the funnel part that float over described CRT member.
Described insulating material 21 makes a strip part 8la of described getter reed 81 interconnect with another strip part 81b, and is attached on the electron gun 2 of described CRT.Because when described CRT is used as on the display device, unless described getter reed 81 is an electric insulation with described electron gun 2 (being described interior deflector battery lead plate 3b) mutually, otherwise it just may discharge, so use a kind of like this configuration so that described getter reed 81 and described electron gun 2 mutually insulateds, thereby avoid the current potential of described electron gun 2 to be subjected to interference by the electron beam of described getter reed 81.
Yet, because when described getter reed 81 floats in described CRT, influenced the direction that electron beam is propagated thereby its has static, therefore, the part of described getter reed 81 has with the inner conductive plated film 8 of described CRT funnel part and to contact.Therefore, when the part of described getter reed 8l has when contact with described inner conductive plated film 8, described electron beam all will be mapped on the described phosphor screen usually.
The getter 92 that is supported by described getter reed 81 is placed within the described CRT.Described getter 92 carries out getter and evapotranspires and heated by the high-frequency heating from described CTR outside in the operation making described CRT.
In described getter evapotranspired the operation process, described getter 92 was heated to a very high temperature by described high-frequency heating, and is vaporized.A kind of like this danger so just may occur, promptly make the contact portion of described funnel glass 1a and described getter reed 81 break.
Particularly, when the temperature that is installed in the getter 92 in (or leaving in) described container 15 was measured, this temperature can be up to about 1200 ℃.When if described container 15 directly contacts with the funnel glass 1a of described CRT member 1, described high temperature can make the contact site office generation of described funnel glass 1a break.Break for fear of generation, described getter reed floats aforesaid, thereby make described container 15 directly not contact, and have only the head portion 83 of described getter reed 81 strip part 81a and two end portions 84a, the 84b of its billet shape part 81c to contact with described funnel glass 1a with the funnel part of described CRT member 1.
But,, still can reach about 740 ℃ in its mean temperature of contact site office with described getter reed 81 contacted described body funnel glass 1a although used this configuration.
On the other hand, the thermal impedance angle from described funnel glass 1a can confirm, if increase so that surpass 750 ℃ with the temperature of the 1a contact portion of described getter reed 81 contacted described funnel glass, so, described funnel glass will break.Therefore, in the described getter that uses described getter reed 81 to carry out evapotranspired the operation process, poor (being the temperature allowance) that be added in described getter evapotranspires the operation process between the temperature (promptly being approximately 740 ℃) of described funnel glass 1a and the temperature (promptly 750 ℃) that described funnel glass 1a can bear high temperature only was about 10 ℃.In fact, often can see because the difference of CRT characteristic breaking in manufacture process such as described funnel glass 1a that factors vary caused such as the deviation of the riding position of getter quantity, heating time, described getter reed 81 or ambient temperatures.
In addition, because shown in Fig. 2 C, described getter reed 81 and described container 15 weld by place, described billet shape part 81c two ends and are connected one to the other to together, described getter reed 81 can produce thermal expansion with container 15 with different speed owing to be heated to different temperature, make described getter reed 81 distortion sometimes, in the worst case, getter reed 81 is split away off from described container 15 in its weld part office.
One object of the present invention is exactly the CRT that a kind of getter spring assembly will be provided and use this getter spring assembly, described getter reed can evapotranspire in the operation to the CRT assembly making described getter that described CRT process carries out, and promptly the funnel glass of CRT applies heat seldom.
Another object of the present invention is exactly a CRT that a kind of getter spring assembly will be provided and use this getter spring assembly.In this CRT, do not need that described getter spring assembly and CRT are done too much modification and just can avoid breaking of described funnel glass.
A further object of the present invention will be compared with above-mentioned configuration exactly, is making a getter reed, is being connected to described container on the described getter reed and described relatively CRT required expense of reduction when settling described getter reed.
According to a first aspect of the invention, described getter spring assembly, comprise: a container, be used for depositing therein a kind of getter, with a getter reed, be used to support described container, wherein by on the part that a container is fixed on the getter reed described container being connected on the described getter reed, and described container and described getter reed are contacted at a some place formation point of another part, reduced the heat that in getter evapotranspires operation, conducts thus to described getter reed.
Getter spring assembly according to a second aspect of the invention, wherein said getter reed is provided with a little hemispherical portion or projection at a point of described another part place, being welded on a described part place by utilization is fixed to described container on the described getter reed, by described container is contacted with described little hemisphere portion or projection slidably at a point of described another part place, and the remainder by making described container and described getter reed leave configuration and described container are connected on the described getter reed, thermal dilation difference between described container and the described getter reed can be ignored, and can reduce the heat that in getter evapotranspires operation, conducts to described getter reed.
According to a third aspect of the present invention, be placed on the getter spring assembly in the cathode ray tube with a funnel glass and an electron gun, comprise: a container, be used for placing therein a kind of getter, with a getter reed, be used to support described container, wherein said getter reed has a little hemispherical portion or projection and a curved portion, wherein said getter reed is made by elastomeric material and is shaped, thereby make it have the total angle of penetrating pipe funnel glass inclined surface angle greater than described negative electrode, and make it to be fixed in the said funnel glass on the described electron gun by utilizing welding that described getter reed is fixed at one end place, so that it extends with the inclined surface of an interval along described funnel glass, and by curve part office that it provides in described getter reed other end place and described funnel glass are contacted on one point, and wherein being welded on the described curved portion position far away of leaving described other end place and providing by utilization is connected described container on the described getter reed, and described little hemispherical portion or projection are located on another part of the nearer getter reed of the described curved portion that provides apart from described other end place, described container is contacted with the little hemispherical portion or the projection of described getter reed slidably, described container is connected on the described getter reed, can ignore the thus difference of thermal expansion between described container and described getter reed, and reduce the heat that described getter reed is given in described getter evapotranspires operation conduction.
According to a fourth aspect of the present invention, have with comprise at the cathode ray tube that uses a getter to evapotranspire in the operation and to be configured in a getter in the described body the above-mentioned multiple getter spring assembly that is used for supporting described getter a kind of.
By below in conjunction with the detailed description of accompanying drawing to most preferred embodiment of the present invention, above-mentioned, other characteristic of the present invention and advantage will become more apparent, and wherein: in the accompanying drawings, same label is used to indicate identical or similar part.In described accompanying drawing:
Figure 1A shows a getter reed briefly to Fig. 1 D, and its Figure 1A shows the plan view of a still unfashioned getter reed; Figure 1B is an end view, and it shows a getter reed, is used to explain the case of bending of a getter reed that has been shaped; Fig. 1 C is a cutaway view, and it shows in detail the part that the with dashed lines circle is marked in Figure 1A, and Fig. 1 D is a profile, is used for being illustrated in the described getter reed that Figure 1A D-D ＇ along the line is cut open.
Fig. 2 A has schematically illustrated a container and above-mentioned getter reed to 2D, and wherein, Fig. 2 A is a profile of described container; Fig. 2 B is the perspective view that contains the described container of a getter reed therein;
Fig. 2 C is a perspective view that has the described getter reed of coupled from behind described container, and Fig. 2 D is the perspective view that described container, getter reed and insulating material are incorporated into a time-out;
Fig. 3 shows a cross section view that uses the cathode ray tube of above-mentioned getter reed;
Fig. 4 shows according to an embodiment of the invention a getter reed and uses the cross section view of a cathode ray tube of described getter reed;
Fig. 5 A has schematically illustrated described getter reed to 5D, and wherein, Fig. 5 A shows the plan view of a still unfashioned described getter reed; Fig. 5 B shows the end view of described getter reed, is used to explain the case of bending of a described getter reed that has been shaped; Fig. 5 C shows the cutaway view of the described getter reed of cutting open along the ＇ of line C-C shown in Fig. 5 A; Fig. 5 D shows the cutaway view of the described getter reed of cutting open along Fig. 5 A center line D-D ＇.
Fig. 6 A and Fig. 6 B show the perspective and the profile of described getter reed bound fraction respectively;
Fig. 6 C is a characteristic curve diagram, and it shows in the interval of described bound fraction and the relation between the discharge inception voltage;
Fig. 7 A shows the described getter reed that described container is installed to Fig. 7 C letter, and wherein, Fig. 7 A shows the rearview of the getter reed that described container is installed; Fig. 7 B shows the end view of the getter reed that described container is installed, and Fig. 7 C then shows the end view that the negative electrode that described getter reed is installed is penetrated pipe;
Fig. 8 A and Fig. 8 B are respectively applied for the shape of the getter reed that explanation obtained when forming getter reed according to the present invention and getter reed shown in Figure 1;
Fig. 9 is used to explain the assembling procedure of the described cathode ray tube of described getter spring assembly used according to the invention; With
The flowcharting of Figure 10 is installed to the operation of being carried out on the described cathode ray tube and the assembling procedure of described cathode ray tube with described getter spring assembly.
The cathode ray tube (CRT) that uses a getter spring assembly according to the present invention is described below with reference to accompanying drawings.
Describe at first simply according to getter spring assembly of the present invention and described CRT.
It for example is the major part of the color CRT (registered trade mark) of a trinitron (Trinitron) according to this embodiment that the profile of Fig. 4 has illustrated.Divide haply, described CRT is by a faceplate part, and a funnel part and a neck are formed.Described funnel part and neck are welded together in neck shape weld part office.Described funnel part and described neck are commonly referred to as funnel.
As shown in Figure 4, described CRT comprises a CRT assembly 1 (also being known as " funnel glass ") and an electron gun 2 that is configured within the described neck.Described electron gun 2 comprises a first grid G
1, a second grid G
2, the 3rd grid G
3, the 4th grid G
4, the 5th grid G
5With a focusing board (deflecting electrode plate) 3.In the typical configuration of described CRT, described first grid G
1With second grid G
2Constituted a cathode lens, promptly an object point forms the zone.Described second grid G
2With described the 3rd grid G
3Constituted a prefocus lens (prime lens).Described the 3rd grid G
3, the 4th grid G
4With the 5th grid G
5Formed main focusing lens (main lens).
Under the situation of Trinitron picture tube, the described electron gun 2 that is inserted in its neck is one (electron) guns.Intersected with each other by three negative electrode KR, KG and KB electrons emitted bundle in the center of main focusing lens, disperse each other then.The electron beam of dispersing by statically or electromagnetic ground focus on again by hole grid (in Fig. 9, being designated as 62) as colored selection mechanism.After this, they are focused on the point and strike on the phosphor screen.
Known a large amount of electron lens configurations has been arranged.To describe below and use a single electromotive force to focus on the single main lens type electron lens of (UPF) system.Described the 3rd grid G
3With described the 5th grid G
5Be electrically connected with lead 5.From anode voltage (high pressure) HV of an anode button (not shown) by the outer conductor 12a of a coaxial cable 12, the formed leaf spring 13 of C shape metallic plate that is connected to described outer conductor 12a, inner wire coating 8, with one and described inner wire coating 8 contacted conducting contacts 15, be applied in to the described the 3rd and the 5th grid G with such order
3And G
5
Described the 4th grid G
4The formed end of stem stem 1c that is provided with by end parts place at described neck be provided to lead 7 from 0 low voltage that changes in hundreds of volt voltage ranges.Thus, described the 3rd grid G
3, the 4th grid G
4With the 5th grid G
5Constituted the main focusing lens of described UPF system.
Described focusing arrangement 3 is by two interior deflector battery lead plate 3a, 3b being oppositely arranged and the outside deflecting electrode plate 3c, the 3d that are separately positioned on described interior deflector battery lead plate 3a, 3b outside.Described interior deflector battery lead plate 3a, 3b provide anode voltage HV from described the 5th grid G 5 that with it machinery is arranged and be electrically connected.Described outside deflection electroplax 3C, 3D are provided by described anode button (not shown) and the center conductor 12b by described coaxial cable 12 focus voltage CV are provided.Described focus voltage CV is lower than the hundreds of volts of described anode voltage HV.
To describe the relation between described CRT and the described getter reed below in detail.Above-mentioned CRT is equipped with a getter reed 16 that is formed and had an end to be connected with one of described interior deflector battery lead plate 3a, 3b (being interior deflector battery lead plate 3b) by strip metal plate.Described getter reed 16 has a container, and this container is contained near the part of described getter reed 16 other ends, and is used for (or within it) installation (or depositing) getter thereon.Described getter reed 16 is formed by two getter reed member 16a and 16b that connected with insulating material 21.Described getter reed 16 for example at interval about about 2mm time along and above the inclined-plane of described funnel glass 1a, extend.Described getter reed 16 surpasses a short part beyond described container 15 attachment portions in another distolateral extension, thereby is in contact with one another (seeing Fig. 7 C) with the internal conductive coatings 8 that covers on the described CRT funnel part inner surface.
Describe described getter reed 16 and described container 15 below in detail.Described getter reed is to constitute by shaping such as the bullion of stainless steel SUS304 (elastomeric material).When the getter reed 81 shown in Figure 1A is the right-angled intersection shape, according to getter reed 16 of the present invention be a long rectangle (bar shaped) and not needing have with side's upwardly extending billet shape part of strip part quadrature.Thus and the getter reed 81 shown in Figure 1A compare, described getter reed 16 has been simplified.Similar with the container 15 shown in Fig. 2 A, the 2B, be fixed in the concave part (groove) that the container 15 on the described getter reed 16 also has an annular.Described getter 92 is installed in (or leaving in) described concave part.
The size of employed in the present embodiment described getter reed 16, container 15 and insulating material 21 is described below.Certainly, following size also can be according to the Fundamentals changes such as size such as CRT characteristic and CRT.
Described getter reed 16 is made of SUS304 (spring material), and it is of a size of 114.2mm (length) * 4mm (width) * 0.25mm (thickness).Described container 15 is made by SUS304, and it is of a size of 21 φ (external diameter) * 13 φ (internal diameter) * 2mm (highly).Described insulating material 21 is that the alum clay ceramics material is made, and it is of a size of 15mm (length) * 4mm (width) * 1.8mm (thickness).
Shown in Fig. 5 A, described getter reed 16 is being divided into two getter reed member 16a and 16b near utilization such as 27 places, position that suitable ways such as welding are fixed in the end of described interior deflector battery lead plate 3b.Be similar to the getter reed 81 shown in Figure 1A, these two getter reed 16a and 16b utilize described insulating material 21 to be joined together, and make their electric insulations each other thus.
Described insulating material 21 is to be formed by the alum clay insulating material that is similar to the insulating material shown in Fig. 2 D.Shown in Fig. 6 B, described insulating material 21 has the hole 23a and the 23b that are used to receive tubular rivet 22a, 22b of defined thereon, and taper dome projection 24a, the 24b in described hole 23a, the 23b outside are given prominence to and be separately positioned on to a first type surface from it.
Two the getter reed member 16a and the 16b that constitute described getter reed 16 have hole 25a, the 25b that limits at its terminal part branch respectively, with relative with hole 23a, 23b on the described insulating material 21.Described two getter reed member 16a and 16b have engaging hole 26a, the 26b that limits at its terminal part branch respectively, thereby can be meshing with each other with dome projection 24a, the 24b of described insulating material 21.As shown in Figure 6A, described getter reed member 16a, 16b are configured on the first type surface of described insulating material 21, make the D that is spaced apart of their end portion.Simultaneously, the dome of described insulating material 21 projection 24a, 24b is meshing with each other with engaging hole 26a, the 26b of described getter reed member 16a, 16b respectively.Its result makes hole 23a, the 23b of described insulating material 21 be positioned, thereby makes and to align mutually with hole 25a, the 25b of described getter reed member 16a, 16b respectively.
Shown in Fig. 6 B, under above-mentioned state, be embedded into hole 25a, the 25b of hole 23a, the 23b of described insulating material 21 and described getter reed member 16a, 16b from the rear surface of described insulating material 21 respectively by made tubular rivet 22a, the 22b of aluminium among.Utilize suitable pressure that described rivet 22a, 22b are gone into from described getter reed 16 1 side rivetings then.
According to this method of attachment, as described two getter reed member 16a, when 16b is joined together, described rivet 22a and 22b are gone into by riveting and each dome projection 24a, 24b are meshed with described engaging hole 26a, 26b.Therefore, only utilize described rivet 22a, 22b just described getter reed member 16a, 16b can be fixed on the described insulating material 21 reliably.Thus, just can make described getter reed member 16a, 16b avoid rotating with respect to described insulating material 21.Because the dome of described insulating material 21 projection 24a, 24b are tapers, even so have under the situation of a little change in the size of described engaging hole 26a, the 26b of described getter reed member 16a, 16b, dome projection 24a, the 24b of institute's art also can be assembled among described engaging hole 26a, the 26b securely.
Interval D between described insulating material 21 the above getter reed member 16a, 16b is preferably the narrowest be recharged with the surface of avoiding described insulating material 21 in, described interval D should be greater than certain length, to avoid along the surface discharge between described getter reed member 16a, the 16b.In this routine embodiment, described interval D is set to about 5mm.But if lower according to the employed voltage of the difference of CRT characteristic, so described interval D can further reduce.The indicatrix of Fig. 6 C show the interval D (mm) between described getter reed member 16a, the 16b of described getter reed 16 and when described getter reed member 16a, 16b be relation between the discharge inception voltage (KV) that obtained when being placed on the described insulating material 21 of D by separation.Described interval D is suitably determined according to the measurement result of the indicatrix that concerns between described interval D and the described discharge inception voltage is shown.
Described insulating material 21 preferably is positioned in from described container 15 described part place far away as far as possible, and the insulating material 21 of art is damaged by the evapotranspire getter of vaporization of institute's scattering of getter to avoid.Therefore, in this embodiment, described getter reed 16 is divided into described getter reed member 16a, 16b at 27 places, position of the described interior deflector electron plate 3b of close described electron gun 2, and described getter reed 16a, 16b utilize described insulating material 21 to connect.
After utilizing described insulating material 21 that described getter reed 16a, 16b are combined, utilize such as the end of suitable method such as welding to be fixed on the described interior deflector battery lead plate 3a or 3b of described electron gun 2 with described getter reed member 16b.
When described getter reed 16 is positioned within the funnel part of described CRT, be connected to the described getter reed member 16a on the described insulating material 21, bent to 10 °, 20 °, 20 °, 20 °, 15 °, 11 ° and 3 ° of angles successively in proper order in succession at a plurality of bending position I, II, III, IV, V, VI and VII place, shown in Fig. 5 B, thereby its inclined surface along the funnel part of described CRT assembly 1 is extended.
Shown in Fig. 5 A, 7A, can form one at the sweep VI of described getter reed member 16a and the part place between the sweep VII and be approximately the wide width segments of 4mm 28, so that by described container 15 being installed on the described getter reed 16 such as suitable methods such as welding.For example, when the width of described getter reed 16 was approximately 4mm, the width of its width segments 28 was approximately 5mm.The concave part or the groove 22 that begin can to provide till described width segments an edge to extend as the length direction as getter reed member 16a as described in shown in Fig. 5 C of profile from described width segments 28 to the part that described mate is offset slightly on described getter reed member 16a are so that improve the bending strength of described getter reed 16 these parts.
From described sweep VII to the part that described end portion is offset slightly, having formed for example is the little hemisphere portion (or projection) 23 that is about 1mm to the radius that described container 15 bottom surface 15a stretch out.Described smaller part ball portion 23 can be by to when utilizing punching press with the described getter reed 16 that constitutes, makes described getter reed 16 extrude suitable projectioies from its rear surface and form.Interval between described smaller part spherical part 23 and the described width segments 28 or space S (seeing Fig. 7 A) are substantially equal to the periphery circular diameter of described annular container 15 and the mean value of interior all circular diameters.Therefore, when the basal surface 15a of described container 15 is located on the described width segments 28, except that the part of described smaller part spherical part 23 that departs from described container 15 and width segments 28, the summit of described smaller part spherical part 23 contacts with the basal surface part 15a of described container 15.Under the situation of this positioning relation between described getter reed 16 and the described container 15, as Fig. 7 A, utilization is such as suitable methods such as welding, near two position 41a of Width end portion, 41b position and in the basic central part office perpendicular to the direction of described Width described container 15 is being fixed on the width segments 28 of described getter reed 16.The basal surface 15a of described container 15 and the smaller part spherical part 23 of described getter reed 16 are in contact with one another each other slidably.Therefore, even produce thermal expansion with described container 15 with different speed, also can avoid described getter reed 16 distortion or be added with unnecessary stress at described getter reed 16.
To describe the manufacture method of described getter reed 16 below and described getter reed 16 will be installed to method on the described CRT.In order to utilize a kind of operating efficiency of having improved to make described getter reed 16 at an easy rate, by being that the SUS304 (spring material) of 0.25mm carries out punching press and moulding obtains described getter reed 16 for example to thickness.Be preferably in the curved portion 24 and the concave part 22 that form described smaller part spherical part 23 when carrying out punching press and extend along described getter reed 16 length directions.
Because getter reed 81 shown in Figure 1A is cross types, and be a rectangle (bar shaped) that does not use described billet shape part basically, therefore can use described material effectively according to the getter reed 16 of present embodiment.Can utilize the material of about 1/3 amount to make described getter reed.Therefore, getter reed of the present invention can come cheap production according to the viewpoint of material cost.When making described getter reed 81, described getter reed 81 intersects the described material of incision so that save described material shown in Fig. 8 B.But if do like this, described getter reed 81 will the bending owing to the heat that is produced in getter evapotranspires operation.On the other hand, by according to the getter reed 16 of present embodiment as Fig. 8 A perpendicular to as described in the material width direction material is cut, so, avoided the problem that in getter evapotranspires operation, buckles according to the getter reed 16 of present embodiment.
Describe below with reference to Fig. 9 and 10 described getter reed 16 is installed to mode on the described CRT.
On the inner surface of described panel 61, apply a kind of fluorescer thin pulp and make its development (Figure 10 operation 711), apply an intermediate layer (operation 712) then thereon, by metal backing the reflective film that is formed by an aluminium film is evaporated on it to form a metal backing (operation 713) then.Assemble hole grid (operation 714).
A funnel 63 of making separately is connected to (operation 715) on the panel 61, and is fixed to (operation 716) on the described panel 61 by a fusing and a welded bond of crystallization (solid glass) on the connection surface.
Described getter reed 16 is connected to (operation 714) on the electron gun 2.Described electron gun 2 is placed among the described neck 64, and stem stem part and described neck 64 sealed (operation 717).With the exhaust of described CRT assembly be evacuated (operation 718).
After described deairing step 718, in a getter evapotranspired operation (operation 719), the inside of described CRT assembly kept the vacuum state of height.
Carry out aging process (operation 720) and an inspection process.Thereby finished the installation process of described CRT.
In above-mentioned getter evapotranspires operation, be installed in a thermatron 41 (being shown in Fig. 7 C) that getter on the described container 15 is loaded on described funnel outside and heat and be evaporated.Barium Ba (getter) is evaporated to the inner surface of described CRT assembly to form a film.In aging process was handled, if when described heater is by energy supply, described voltage was added to described first and second grid G
1, G
2On, and electric current flows through described negative electrode, remain in gas in the described CRT assembly so and be easy to be placed in the getter that evapotranspires among the CRT that operation handles through described getter and absorb, thereby the inside of described CRT assembly is remained under the high vacuum state.
Function and effect according to getter reed of the present invention will be described below.
Maximum characteristics of the present invention are to have avoided the conduction of the heat that produced in described getter evapotranspires to give described funnel glass as much as possible.
Shown in Fig. 7 B, on the container 15 that getter 92 is installed and surface that described getter reed 16 contacts each other, formed a thermal barrier.Particularly be fixed under the state of described container 15 basal surface 15a at the position 41a, the 41b that utilize welding with described width segments 28, described getter reed 16 is supporting described container 15, the top of described smaller part spherical part 23 contacts with described point 41, and its another part does not then contact with it.Utilize this configuration, even the getter 92 that leaves in the described container 15 is heated to a very high temperature by the high-frequency heating from described CRT assembly outside, it is about 1200 ℃, except welding portion 41a, 41b and select and between described container 15 and getter reed 16, also exist a space the contact portion 23 as thermal barrier properties.By described deairing step, described space remains on vacuum state, has avoided transmission thus.Therefore, heat does not conduct betwixt.But, because described contact portion only limits to above-mentioned welding portion and puts contact portion therebetween.So, also can think and reduce heat conduction therebetween.Particularly, because described some contact portion only is a very little zone, can avoid a large amount of heat of conduction rapidly.
The length of the heat conduction via that shown in Fig. 7 C, is designed.Particularly, when described heat along the length direction of described getter reed 16 to described curved portion 24 (here from described welding position 41a, 41b, described getter reed 16 contacts with the funnel glass 1a of described CRT assembly 1) when conducting, described thermal conduction path is very long.Therefore, can look to suitable low of temperature at described curved portion 24 places.Though, shorter to another thermal conduction path of described curved portion 24 by described smaller part spherical part 23 from the basal surface 15a of described container 15, the some place of zonule contacts with each other mutually but described basal surface 15a and described smaller part spherical part 23 only have very at one.Therefore, described another thermal conduction path is very difficult for a large amount of heat of quick conduction.
In addition, because the curve that the described curved portion 24 that provides at the front end place of described getter reed 16 has a convex, so described getter reed 16 only contacts at a some place each other with described funnel glass 1a.Therefore, the contact area between them is restricted.
Owing to compare with the heat that is conducted by described getter reed 16, directly the heat of being penetrated by getter 92 and 15 width of cloth of container is very little, so, can ignore the heat of described thermal radiation.
Narration is according to the effect of the described getter reed 16 of present embodiment below.
When having used getter reed 16 according to the present invention, contact surface place between the sweep 24 of described getter reed 16 and described funnel glass 1a, carry out getter when evapotranspiring operation measured temperature approximately be 640 ℃, this temperature value is the mean value of measured value.When the getter reed 81 shown in use Figure 1A, the temperature value that records in the contact surface place of described getter reed 81 and funnel glass 1a is approximately 740 ℃, and this also is the mean value of measured value.Approximately low 100 ℃ of the temperature that is appreciated that the temperature that obtained when using described getter reed 16 according to comparative result and is obtained when using getter reed 81.Also have, be about 750 ℃ owing to described funnel glass 1a can bear heated temperature, when described temperature and above-mentioned use getter reed so poor (temperature allowance) between the mean value (740 ℃) that is obtained approximately only is 10 ℃.But when the getter reed 16 that uses according to present embodiment, what differ between the mean value (640 ℃) that is obtained when described funnel glass 1a can bear heated temperature and uses getter reed 16 is increased to 110 ℃.Therefore, even because some factor of the difference of all characteristics of CRT as described and the deviation of manufacturing process etc. makes said temperature poor (promptly about 110 ℃) reduce to some extent, even but still can provide a funnel glass 1a wherein carrying out the CRT that described getter evapotranspires and also can not break in the operation.
According to this embodiment, described container 15 is fixed on the part of described getter reed 16, and locates by getter reed 16 sliding supports a contact.Therefore, even when described getter 92 is heated to container 15 that getter evapotranspires the temperature of operation and wherein be placed with described getter 92 when being heated to than the high relatively temperature of getter reed 16 temperature, because the difference of the thermal expansion between getter reed 16 and container 15, described getter reed 16 can not be out of shape yet, and they can not throw off at its welding portion mutually yet.
CRT according to described getter reed 16 and this getter reed 16 of use, the funnel glass 1a that just can solve described getter reed 81 go up to produce the problem of breaking, and make described CRT use not to the arrangement of described getter reed 16 do configuration that the getter reed too much revised and CRT use same getter reed 81 and CRT use only need the shape of getter reed 81 only simply change become getter reed 16 shapes just passable.
According to this embodiment, when described getter reed 81 had along the billet shape part of extending perpendicular to its length direction, described getter reed 16 did not have such billet shape part.Therefore, compare with described getter reed 81, described getter reed 16 can be saved 1/3 material (seeing Fig. 8 A) and reduce described material cost.
According to this embodiment, when described getter reed 81 is soldered on the described container 15 two positions (seeing Fig. 2 C), described getter reed 16 (is seen Fig. 7 A) by welding simultaneously to be soldered on the described container 15 in two positions on the part.Therefore, can reduce manufacturing cost.Locating contacted described smaller part spherical part 23 a contact with the basal surface 15a of described container can be formed in the described getter reed 16 under described material cutting.
Some modification that this embodiment is made will be described below.In the CRT of present described foundation described getter reed 16 of the present invention and the described getter reed 16 of use, the present invention is not restricted to the described embodiments, and principle of the present invention also can be applied among the following modification.
For example, at the CRT that the present invention is applied to the specific type that uses in the above-described embodiments simultaneously, the present invention is not limited, and the present invention's described getter of use that can be applied to any kind CRT that operation handles that evapotranspires, to improve its inner vacuum state.
In the above-described embodiments, described getter reed 16 end is fixed on the described interior deflector battery lead plate 3b of described electron gun 2.But the present invention is not limited.Can be fixed on arbitrary part in the described CRT to described getter reed 16.For example, described getter reed 16 can be fixed on described electron gun 2 suitable arbitrary portion on.
Described getter reed 16 comprise one of two positions part place be soldered on the described container 15 and be connected with described container 15 a office, the other end as the contact.But the present invention is not limited, and this is owing to the heat conduction that the objective of the invention is to reduce between them.Even if only a position in being equipped with described getter reed 16 width segments 28 of enough width is welded to described getter reed 16 on the described container 15, also described container 15 can be fixed on the described getter reed 16 reliably.On the contrary, if necessary, described getter reed 16 can be three positions or more the multiposition place be welded on the described container 15.
As mentioned above, described getter reed 16 is to contact with described container 15 at a some place of described little ball portion (or projection) 23, but the present invention is not limited, and described getter reed 16 can contact with described container 15 at a some place.This contact can by the described getter reed 16 of suitable shaping and described container 15 or described the two one of realize.For example on described getter reed 16, do not form described little hemispherical portion (or projection) 23, but on the 15a of the basal surface of the described container 15 that has the flat tablet reed 16 of cooling down, form described smaller part spherical part 23.In addition, if one in described getter reed 16 or the described container 15 is provided with the herringbone convex portions that extends suitable length, and another is provided with a convex portions that extends suitable length on perpendicular to the direction of described herringbone convex portions, so, described getter reed 16 contacts at a some place each other with described container 15.In this embodiment, they contact each other at a some place, but the present invention is not limited, and the quantity of contact is not restricted to one.In the present invention, as long as the contact between them is effectively just enough.They can contact each other at two or more somes place.
In this embodiment, the cochlear curved portion 24 that provides in described getter reed 16 leading section offices contacts with described funnel glass 1a, but the present invention is not limited.
The present invention only need reduce the area of the contact portion between described getter reed 16 and the described funnel glass 1a, can consider any shape and design that can reduce the getter reed 16 of described contact portion area.
Some necessary factor at the CRT that considers the specific type that the present invention need be applied to, can bear heated temperature such as funnel glass, in the evapotranspire temperature of the reed of getter described in the operation of described getter, under the situation by determined temperature range of CRT characteristic and manufacturing cost etc., can carry out above-mentioned change and modification arbitrarily.
CRT according to the present invention is because described CRT has used the getter reed that can reduce the heat conduction in getter evapotranspires operation, so can improve the quality of described CRT.
According to the present invention, can consequently greatly increase the output of manufacturing CRT revising the reed of getter shown in Figure 1A 81 significantly and using under the situation of CRT of identical reed and avoid described funnel glass to break.
In addition,, compare, can reduce manufacturing cost with the CRT of the getter reed 81 shown in Figure 1A and this kind of use getter reed according to the present invention.
Most preferred embodiment of the present invention is described with reference to accompanying drawing, be to be understood that, the present invention is not restricted to the described embodiments, under the prerequisite that does not break away from by the defined the spirit and scope of the present invention of claims, the technical staff of this professional domain can make various changes and modification.
Claims (4)
1, a kind of getter spring assembly comprises:
A container, be used for depositing therein a kind of getter and
A getter reed, be used to support described container, wherein by on the part that a container is fixed on the getter reed described container being connected on the described getter reed, and described container and described getter reed are contacted at a some place formation point of another part, reduced the heat that in getter evapotranspires operation, conducts thus to described getter reed.
2, getter spring assembly according to claim 1, a point of the described another part of wherein said getter reed place is provided with a little hemispherical portion or projection, being welded on a described part place by utilization is fixed to described container on the described getter reed, by described container is contacted with described little hemisphere portion or projection slidably at a point of described another part place, and the remainder by making described container and described getter reed leave configuration and described container are connected on the described getter reed, thermal dilation difference between described container and the described getter reed can be ignored, and can reduce the heat that in getter evapotranspires operation, conducts to described getter reed.
3, a kind of getter spring assembly that is placed in the cathode ray tube with a funnel glass and an electron gun comprises:
A container, be used for placing therein a kind of getter and
A getter reed, be used to support described container, wherein said getter reed has a little hemispherical portion or projection and a curved portion, wherein said getter reed is made by elastomeric material and is shaped, thereby make it have total angle greater than described cathode-ray tube hopper glass inclined surface angle, and make it to be fixed in the said funnel glass on the described electron gun by utilizing welding that described getter reed is fixed at one end place, so that it extends with the inclined surface of an interval along described funnel glass, and by curve part office that it provides in described getter reed other end place and described funnel glass are contacted on one point, and wherein being welded on the described curved portion position far away of leaving described other end place and providing by utilization is connected described container on the described getter reed, and described little hemispherical portion or projection are located on another part of the nearer getter reed of the described curved portion that provides apart from described other end place, described container is contacted with the little hemispherical portion or the projection of described getter reed slidably, described container is connected on the described getter reed, can ignore the thus difference of thermal expansion between described container and described getter reed, and reduce the heat that described getter reed is given in described getter evapotranspires operation conduction.
4, one has the getter that uses and described getter and is placed on cathode ray tube within its cathode ray tube assembly in getter evapotranspires operation, comprises:
According to each described getter spring assembly that is used to support described getter in the claim 1 to 3.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP267664/94 | 1994-10-31 | ||
| JP267664/1994 | 1994-10-31 | ||
| JP6267664A JPH08129977A (en) | 1994-10-31 | 1994-10-31 | Getter spring and cathode-ray tube using the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1133486A CN1133486A (en) | 1996-10-16 |
| CN1068975C true CN1068975C (en) | 2001-07-25 |
Family
ID=17447825
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN95119169A Expired - Fee Related CN1068975C (en) | 1994-10-31 | 1995-10-31 | Reed of gas eliminating agent and cathod adopting said reed |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JPH08129977A (en) |
| KR (1) | KR960015686A (en) |
| CN (1) | CN1068975C (en) |
| GB (1) | GB2295267B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE69838364T2 (en) | 1997-06-20 | 2008-05-29 | Hitachi Kokusai Electric Inc. | Read / write device, power supply system and communication system |
| JP2000213908A (en) | 1998-11-16 | 2000-08-04 | Sony Corp | Electrostatic capacity detecting device, its detecting method and fingerprint collating device |
| US6452322B1 (en) * | 1998-11-27 | 2002-09-17 | Sony Corporation | Cathode-ray tube and its getter supporter |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1298101A (en) * | 1969-03-24 | 1972-11-29 | Gen Electric | Improvements in getter assemblies |
| JPS5034160A (en) * | 1973-06-12 | 1975-04-02 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1274289A (en) * | 1968-10-28 | 1972-05-17 | Union Carbide Corp | Improved getter assembly |
-
1994
- 1994-10-31 JP JP6267664A patent/JPH08129977A/en active Pending
-
1995
- 1995-10-30 GB GB9522167A patent/GB2295267B/en not_active Expired - Fee Related
- 1995-10-31 CN CN95119169A patent/CN1068975C/en not_active Expired - Fee Related
- 1995-10-31 KR KR1019950038365A patent/KR960015686A/en not_active Application Discontinuation
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1298101A (en) * | 1969-03-24 | 1972-11-29 | Gen Electric | Improvements in getter assemblies |
| JPS5034160A (en) * | 1973-06-12 | 1975-04-02 |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2295267A (en) | 1996-05-22 |
| CN1133486A (en) | 1996-10-16 |
| GB9522167D0 (en) | 1996-01-03 |
| JPH08129977A (en) | 1996-05-21 |
| GB2295267B (en) | 1998-07-08 |
| KR960015686A (en) | 1996-05-22 |
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