CN1303115A - Production method and production equipment of cathode ray tube and cathode ray tube - Google Patents
Production method and production equipment of cathode ray tube and cathode ray tube Download PDFInfo
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- CN1303115A CN1303115A CN 00133773 CN00133773A CN1303115A CN 1303115 A CN1303115 A CN 1303115A CN 00133773 CN00133773 CN 00133773 CN 00133773 A CN00133773 A CN 00133773A CN 1303115 A CN1303115 A CN 1303115A
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- ray tube
- cathode ray
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
- H01J9/38—Exhausting, degassing, filling, or cleaning vessels
- H01J9/385—Exhausting vessels
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
- H01J9/02—Manufacture of electrodes or electrode systems
- H01J9/14—Manufacture of electrodes or electrode systems of non-emitting electrodes
- H01J9/142—Manufacture of electrodes or electrode systems of non-emitting electrodes of shadow-masks for colour television tubes
- H01J9/146—Surface treatment, e.g. blackening, coating
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)
- Electrodes For Cathode-Ray Tubes (AREA)
Abstract
In an exhaust/sealing process for a cathode-ray tube, the cathode-ray tube is produced by exhausting air from the cathode-ray tube with creation of a vacuum in the inside and outside of the cathode-ray tube. A production apparatus for the cathode-ray tube is so constructed by providing its exhaust/sealing unit for the cathode-ray tube with means for creating a vacuum on a frit portion of the cathode-ray tube from outside. Accordingly, temperature of blackening process and the like can be lowered and a cathode-ray tube whose weight is reduced can be produced.
Description
The present invention relates to the production method of cathode ray tube and used production equipment and cathode ray tube.
Fig. 1 represents the generalized section of color cathode ray tube.
This color cathode ray tube 10 is included in the phosphor screen (not shown) of the glass screen part 1a the inside of cathode-ray body, and colour selection electrode 3 is provided with in the mode that has predetermined slit to this phosphor screen.
Colour selection electrode 3 comprise colour selection electrode thin plate 7 and framework 6 (6a, 6b), colour selection electrode thin plate 7 contains many banded trellises 5, each of the latter all has the slit-like electron beam perforate 4 that optionally allows main beam to pass; And described framework 6 (6a 6b) is used for supporting this colour selection electrode thin plate 7.
Colour selection electrode 3 is dividing electron gun 2 electrons emitted bundle R the 1c to pass electron beam perforate 4 to be directed to phosphor screen from being arranged on cathode-ray body tube neck.
The glass of cathode-ray body screen part 1a and funnel part 1b are made by for example glass, and these two parts for example utilize welding glass by weld 8 combinations as hermetic unit.
Color cathode ray tube 10 shown in Figure 1 is to produce by predetermined operation.Usually use following temperature conditions in each operation of under higher relatively temperature, carrying out.
1) melanism of colour selection electrode 3: about 450 ℃;
2) fusion sealing process: about 450 ℃
This fusion sealing process also is used for burning the organic substance on the phosphor screen.
3) deairing step: 300 ℃-400 ℃
More than three operations be by 1)-3) and order carry out.Deairing step is to carry out under the state of glass screen part 1a and funnel part 1b and neck part 1c and electron gun 2 sealings.
In other words, glass screen part 1a and funnel part 1b seal by weld 8 with the frit seal material usually, and neck part 1c and electron gun 2 sealings, so that make cathode-ray body inside become enclosure space.
In order to pass through tail pipe 2a from cathode ray tube 10 deaerations, the glass of cathode ray tube 10 screen part 1a and funnel part 1b will have intensity and the air-tightness that can bear the vacuum under the maximum temperature in the deairing step (below 400 ℃).
For this purpose, glass screen part 1a and funnel part 1b utilize the crystallization welding glass to seal as the frit seal agent.
By selecting its material component to use the crystallization welding glass of crystallization under the temperature more than 400 ℃.
The crystallization welding glass of use crystallization under the temperature more than 400 ℃ as mentioned above, carries out the frit seal operation under about 450 ℃ temperature.
But owing to be added in as the high tension on the metal material of colour selection electrode 3, creep (plastic deformation) appears under 450 ℃.
Especially be added with on it in trellis 5 of thin colour selection electrode thin plate 7 of tension force and distortion occurs.
If this creep appears in the frit seal operation, then be assembled into colour selection electrode 3 distortion of shielding the location matches of part 1a with glass, cause in the cathode ray tube of producing color shifts to occur.
Therefore, in order to prevent in the framework 6 of colour selection electrode 3 and colour selection electrode thin plate 7 owing to creep (plastic deformation) appears in the variations in temperature in the frit seal operation subsequently, in the melanism operation of colour selection electrode 3, must creep be occurred in advance by under the temperature that is higher than the frit seal operation, carrying out the melanism operation.
In case carry out the melanism operation under 450 ℃ creep is occurred being higher than, even frit seal operation has subsequently reached same temperature, emerging creep compliance is also less relatively.
But, then be fixed to colour selection electrode thin plate 7 on the framework 6 because certain tension force and creep makes this tension force reduce about 30% with respect to initial setting up if the melanism operation carries out being higher than under 450 ℃ the temperature.
Therefore, expection can such tension force occur and reduce before the melanism operation, so in the initial set-up procedure on the framework 6 that colour selection electrode thin plate 7 is laid on colour selection electrode 3, set up stronger tension force.
Like this, the firm framework 6 that bears strong like this tension force be arranged, thereby the increase of the weight of framework 6, make the weight of cathode ray tube be difficult to reduce.
In order to address the above problem, the invention provides a kind of production method of cathode ray tube, it can reduce the temperature of melanism operation etc., and can produce the cathode ray tube of weight saving; The present invention also provides used production equipment; With and the weight cathode ray tube that can alleviate.
According to cathode-ray pipe production method of the present invention, in the exhaust/sealing process that carries out for cathode ray tube, cathode ray tube interior and outside all vacuumize, so that from the cathode ray tube deaeration.
According to above-mentioned the present invention, vacuumize by in exhaust/sealing process, giving the inside and outside of cathode ray tube, can reduce the pressure differential between cathode ray tube interior and the outside.So, also can alleviate the load that is added in the weld that connects glass screen and funnel.
In the production equipment of cathode-ray tube of the present invention, the exhaust/sealing device of cathode-ray tube comprises that the weld of giving cathode ray tube from the outside vacuumizes the device of usefulness.
According to the structure of the cathode ray tube production equipment of the invention described above,, in exhaust/sealing process, vacuumize for the inside and outside of weld by the device that vacuumizes usefulness from the outside to weld is set.Thereby, by reducing the pressure differential of weld between inside and outside, can alleviate the load that is added on the weld.
Cathode ray tube of the present invention is by constituting with amorphous welding glass connection glass screen and funnel part.
According to the structure of cathode ray tube of the present invention, by connecting glass screen and funnel part with the amorphous welding glass, the amorphous welding glass has in the characteristic that is lower than on the glass material that bonds to glass screen and funnel part under 350 ℃ the temperature.The frit seal operation that therefore, can under this relatively low temperature, connect glass screen and funnel part.
Cathode ray tube of the present invention is included in and carries out the colour selection electrode that melanism is handled under the temperature that is lower than 350 ℃.
According to the structure of cathode ray tube of the present invention, be provided with being lower than and carry out the colour selection electrode that melanism is handled under 350 ℃ the temperature.Like this, little because the cathode ray tube melanism is handled the variation of forward and backward tension force, the intensity of colour selection electrode can reduce.
Fig. 1 is the profile of the signal of color cathode ray tube;
Fig. 2 A be illustrated in the melanism operation melanism under 300 ℃ of treatment temperatures handle forward and backward between the schematic diagram of variation of tension force;
Fig. 2 B be illustrated in the melanism operation melanism under 350 ℃ of treatment temperatures handle forward and backward between the schematic diagram of variation of tension force;
Fig. 3 A be illustrated in the melanism operation melanism under 400 ℃ of treatment temperatures handle forward and backward between the schematic diagram of variation of tension force;
Fig. 3 B be illustrated in the melanism operation melanism under 450 ℃ of treatment temperatures handle forward and backward between the schematic diagram of variation of tension force;
Fig. 4 is the schematic diagram that is illustrated in the temperature and the relation between the tension force utilance of melanism operation;
Fig. 5 is the schematic diagram according to the structure of cathode ray tube production equipment of the present invention;
Fig. 6 is that the expression stove is arranged on the schematic diagram according to a kind of structure of production equipment of the present invention outside;
Fig. 7 A, B, C are the production process schematic diagrames, and order is represented the first half of utilization according to the production process of the production equipment of cathode ray tube of the present invention progressively;
Fig. 8 A, B, C are the production process schematic diagrames, and order is represented Hou half part of utilization according to the production process of the production equipment of cathode ray tube of the present invention progressively;
Fig. 9 is the schematic diagram according to the structure of the cathode ray tube production equipment of another embodiment of the present invention.
The present invention relates to the production method of cathode-ray tube, wherein the exhaust of cathode-ray tube/ In the sealing process, vacuumize for the inside and outside of cathode-ray tube, so that from cathode-ray Pipe is discharged air.
The present invention relates to the production equipment of cathode-ray tube, it be included in the exhaust of cathode-ray tube/ A kind of device that vacuumizes usefulness from the outside to weld is set in the sealing device.
The present invention relates to cathode-ray tube, wherein glass screen and funnel part are by means of amorphous welding glass Glass connects.
The present invention relates to a kind of colour that carries out the melanism operation under the temperature that is lower than 350 ℃ that is included in Select the cathode-ray tube of electrode.
Before describing the specific embodiment of the present invention, summary of the present invention is described at first.
The above-described purpose that colour selection electrode is carried out the melanism operation is summarized as following three The point.
A. colour selection electrode anticorrosion (forming the melanism film)
Light reflection when preventing that B. fluorescent screen carried out exposure-processed
C. avoid colour selection electrode owing to the temperature of frit seal operation changes
From above-mentioned 3, can expect the effect that reaches A and B by forming the melanism film.Therefore, in order to obtain these effects, treatment temperature needn't be higher than 450 ℃.
Why require treatment temperature to be higher than 450 ℃, the most outstanding reason is the purpose that reaches above-mentioned C point that is avoid colour selection electrode to change.
If colour selection electrode 3 changes, above-mentioned color shifts will appear.
Here, the variation of colour selection electrode 3 will be described in detail.
In color cathode ray tube 10, colour picture is by showing R (red), G (green) and the mixing of B (orchid) three primary colors.
By colour selection electrode 3 is arranged on fluoroscopic front, electron beam is mechanically cut by the trellis 5 of colour selection electrode 3, and simultaneously, the electron beam irradiation that passes the electron beam perforate 4 between the trellis 5 is on phosphor screen, make and R, G, the electron beam irradiation of B signal correspondence is at R, G is on the B fluorescent material.
Therefore, as one man form versicolor fluorescent material, thereby constitute phosphor screen with each trellis 5 of colour selection electrode 3.
Total inner surface phosphor screen to glass screen is coated carbon bar (carbon stripe) afterwards, by the trellis 5 of colour selection electrode 3, only on the ground that requires just now red fluorescent material, green fluorescence material and the exposure of blue fluorescent material.Then, unnecessary place is removed, so that form fluorescent material with predetermined pattern.
In other words, this phosphor screen produces by installing or remove colour selection electrode 3 with respect to each color.
According to the method, can be with the phosphor screen of cheap price obtained performance excellence.
Unless the same with when forming phosphor screen after frit seal operation and the deairing step of phosphor screen that obtains with said method and the relation of the position between the colour selection electrode, otherwise the problem of above-mentioned color shifts will appear.
So before forming phosphor screen, colour selection electrode 3 will carry out melanism to be handled, so that produce the creep that will occur in the operation subsequently.Then, utilize the colour selection electrode 3 of described state, can form phosphor screen.
But the temperature in the melanism operation is harsh up to 450 ℃ for material.The variable quantity of the forward and backward tension force of melanism operation reaches 30%.
So colour selection electrode 3 is just produced under such condition, make tension force increase 30%, and intensity need correspondingly to increase, to keep high like this tension force.As a result, the size of framework 6 increases, and its weight is also increased.
Why the temperature in the melanism operation rises, and reason is the temperature conditions of frit seal operation.
This temperature conditions of frit seal operation is in order to satisfy the required condition of deairing step on the subsequent stage.
The condition of deairing step is the intensity that keeps the pressure differential between antagonism cathode ray tube 10 outsides and the atmospheric pressure when air when discharge cathode ray tube 10 inside.
Because cathode ray tube 10 product inside are vacuum, so must keep the intensity of antagonism for the pressure differential of external pressure.
In other words, in traditional deairing step, need the desired intensity of picture cathode ray tube 10 products.
In deairing step,, as mentioned above, under up to 300-400 ℃ heating condition, carry out sufficient exhaust for by suppressing to produce the requirement that gas satisfies enough endurance life characteristics from product.If deairing step carries out under 200 ℃, then enough endurance life characteristics can't satisfy.
Therefore, even the frit seal material of weld 8 also needs to have high strength under such high temperature.
The crystallization welding glass reaches stable by crystallization.If as the frit seal material, then make it to harden, so that keep intensity with the glass of glass screen part 1a and funnel part 1b by crystallization with the crystallization welding glass.
If the use crystallization temperature is lower than 350 ℃ crystallization welding glass as the frit seal material, then in deairing step, can't keep enough intensity down at 300-400 ℃.
Also there is the amorphous welding glass.If as the frit seal material, then can determine the working temperature of frit seal operation like this, so that when the glass of bonding glass screen part 1a of welding glass and funnel part 1b, keep intensity with the amorphous welding glass.
But because the characteristic of amorphous welding glass, working temperature is relatively low, so that following to can keep enough intensity at 300-400 ℃ in deairing step.In order to guarantee that enough intensity resists atmospheric pressure, deairing step must carry out under the temperature than low 100 ℃-150 ℃ of the working temperature of frit seal operation.In this case, can't fully satisfy the requirement of the endurance life characteristic of cathode ray tube.
Reason use the about 450 ℃ crystallization welding glass of crystallization temperature as the frit seal material traditionally, and the frit seal operation is carried out under above-mentioned working temperature (about 450 ℃) for this reason.
The variation of the tension force between the melanism operation is forward and backward is shown in Fig. 2 A, 2B and 3A, 3B, as the result of study of each treatment temperature of melanism operation.
Result when the result the when result the when result when Fig. 2 A represents that treatment temperature is 300 ℃, Fig. 2 B represent that treatment temperature is 350 ℃, Fig. 3 A represent that treatment temperature is 400 ℃, Fig. 3 B represent that treatment temperature is 450 ℃.
In each figure, X-axis is made as horizontal direction, and the position corresponding with the center of the schematic diagram of colour selection electrode 3 is set to original position.(initially) tension force before the melanism operation is gone up at each X coordinate (relative value) and is shown with oral thermometer, and the tension force after the melanism operation is used ● expression.
Shown in Fig. 2 A, 2B, 3A and 3B, along with the rising of treatment temperature, the tension variation that melanism is handled between forward and backward increases, and the variation increase of tension force when mind-set screen periphery is walked from leave.
From the result of Fig. 2 A, 2B, 3A and 3B, obtain melanism and handle the ratio average of tension force afterwards for the initial tension before the melanism processing, then it is expressed as tension force utilance (%).Fig. 4 represents the relation between tension force utilance and the treatment temperature.
As can be seen from Figure 4, when treatment temperature is lower than 350 ℃, tension force utilance height, and, show that then the tension force utilance descends suddenly if treatment temperature surpasses 350 ℃.
Therefore, if the temperature that melanism is handled is reduced to below 350 ℃, then the variation of tension force reduces.So, can be set near the tension force after the melanism operation by initial tension.
As a result, eliminated the necessity that forms the framework 6 of rigidness, and also needn't predict tension variation in advance simultaneously, the structure of framework 6 is simplified, the weight of colour selection electrode 3 is alleviated.
According to the present invention, adopt said structure, promptly, adopt such cathode ray tube production equipment, it has the device that being used in the exhaust/sealing device that is arranged on cathode-ray tube vacuumizes from the weld of outside target ray tube, makes the temperature of melanism processing can be lower than 350 ℃.Utilize such production equipment, in exhaust/sealing process, vacuumize for the inside and outside of cathode ray tube, so that go out air from CRT exhaust.
As a result, in exhaust/sealing process (deairing step and sealing process), vacuumize for the inside and outside of weld 8 of cathode ray tube 10.So, eliminated the pressure differential between inside and outside, make to alleviate load on the weld 8.
Therefore, the intensity of having eliminated welding glass in deairing step must equal the necessity of cathode ray tube 10 desirable strengths.
As a result, no matter the temperature of deairing step how, weld 8 can connect with the crystallization welding glass of amorphous welding glass or crystallization at a lower temperature, thereby the temperature of frit seal operation is minimized.So the melanism treatment temperature of colour selection electrode 3 is reduced greatly.
For example, if the use working temperature is 300 ℃ an amorphous welding glass, then the melanism treatment temperature of colour selection electrode 3 can be reduced to 300 ℃+α.
Because by adopting said structure that the melanism treatment temperature of colour selection electrode 3 is minimized, so can obtain following advantage.
1) creep on the metal that produces during melanism can reduce greatly.In addition, the distortion of the trellis 5 that produces during melanism is avoided.
2) because the melanism operation forward and backward between the variation of tension force reduce greatly, so can reduce to lay the initial tension of colour selection electrode thin plate (the colored baffle of selecting) 7 usefulness, make it less than traditional excessive tension force, make and in the cathode ray tube of making, to obtain Necessary Tensility.
As a result, can reduce the required intensity of framework 6.Therefore,, can simplify its structure, so that obtain the light framework 6 of the traditional framework of weight ratio 6 by reducing the rigidity of framework 6.For example, if the welding operation is carried out under 300 ℃, then its weight can reduce about 30%.
3) because the treatment temperature of stove is handled in melanism stove and welding to be minimized, so heating and illumination cost are minimized.Because the load on the stove alleviates, so the consuming cost of production equipment also just reduces.
4) because reach the time shortening that melanism is handled the temperature of usefulness, so operating efficiency is improved until stove inside.
As for 3) and 4) advantage because the temperature of frit seal operation has also reduced, so relevant frit seal operation also produces identical effect.
Then, one embodiment of the present of invention will be described.
Fig. 5 represents the structural representation as the production equipment of the cathode-ray tube of one embodiment of the invention.
This production equipment 11 of cathode-ray tube is used for producing color cathode ray tube for example shown in Figure 1 10.
This production equipment 11 has first vacuum pump 13, and it is the device that vacuumizes to cathode ray tube 10 inside of being used for that is similar to traditional production equipment.
According to present embodiment, set handling case 12 makes it except that neck part 1c covered cathode ray tube 10 entirely, keeping air-tightness, and second vacuum pump 14 is set, as vacuumizing the device of usefulness for cathode ray tube 10 outsides.
Because second vacuum pump 14 is connected to treatment box 12, vacuumize for the outside 16 of treatment box 12 inside that is cathode ray tube 10.
Therebetween, needn't make the outside 16 of cathode ray tube 10 as the inside of traditional cathode ray tube 10, be in high vacuum state, can be in respect under the enough low pressure of atmospheric pressure, making has a little pressure differential between the inside 15 and outside 16 of cathode ray tube 10.
In addition, as shown in Figure 6, in fact, the work box with heater, for example heating furnace 18 is set, makes it covered cathode ray tube 10 and treatment box 12.
Then, by heating, make its temperature be elevated to the required predetermined working temperature of deairing step to heating furnace 18 inside.
In addition, the heating furnace of usefulness can be handled, handle such as frit seal to heating furnace 18 simultaneously as other.
Although do not illustrate, can adopt a kind of structure, wherein treatment box is as heating furnace (for example, in the inside of treatment box or just in its outer setting such as heaters such as heaters).
Then, description is utilized the process of the production equipment production cathode ray tube of present embodiment.
At first, under 350 ℃ the temperature colour selection electrode shown in Figure 13 is carried out above-mentioned melanism and handle being lower than.
Then, carry out exposure-processed, on the inner surface of glass screen part 1a, form the face of fluorescence coating with predetermined pattern by utilizing the colour selection electrode of handling through melanism 3.
Then, on phosphor screen, form metal back layer (back layer) by intermediate coat.
Then, colour selection electrode 3 being installed in the wherein surperficial glass that has formed phosphor screen and metal back layer within it shields on the part 1a.
Then, shown in Fig. 7 A, preparation has the glass screen part 1a and the funnel part 1b of the colour selection electrode 3 that forms with said method.
Then, shown in Fig. 7 B, utilize the amorphous welding glass of weld 8 or at the welding glass (not shown) that is lower than crystallization under 350 ℃ the temperature as the frit seal material, glass screen part 1a and funnel part 1b are linked together, and for example carry out the frit seal operation under 350 ℃ in predetermined temperature.At this moment, the intermediate coat on fluoroscopic organic substance and the glass screen part 1a inner surface is all burnt.
After finishing the frit seal operation, cathode ray tube 10 is cooled to room temperature gradually therebetween.
Subsequently, shown in Fig. 7 C, electron gun 2 is inserted the neck part 1c of the cathode-ray body that has passed through the frit seal operation, seal electron gun 2 by the stem that the glass of neck part 1c is connected to electron gun 2 then.
Then, shown in Fig. 8 A, the cathode ray tube 10 that its electron gun 2 has been sealed is contained on the production equipment shown in Figure 5 11.
In this case, the part of neck part 1c is exposed from treatment box 12, and the tail pipe 2a of the stem that exposes of electron gun 2 is connected to first vacuum pump 13.
Then, utilize first vacuum pump 13 that the inside 15 of cathode ray tube 10 is evacuated to for example pressure of 0.1mPa (milli handkerchief).
In addition, utilize second vacuum pump 14 that the inside 16 of treatment box 12 is evacuated to for example pressure of 1Pa (handkerchief).
As a result, the pressure differential between the cathode ray tube 10 inner 15 and outside 16 is about 1Pa, and this is more much smaller than traditional data 101kPa.
Therefore, the pressure that is added on the welding glass of weld 8 is reduced.
Give cathode ray tube 10 and treatment box 12 whole inner heating by using such as the heater of heating furnace 18 grades, simultaneously under the situation that pressure differential is little between the inside 15 and outside 16 of cathode ray tube 10, temperature is risen to the predetermined work temperature of deairing step, for example, 300 ℃.
Therebetween, second vacuum pump 14 vacuumizes for the outside 16 of cathode ray tube 10, can perhaps begin in heating process from room temperature as mentioned above.But,, must set up the temperature when beginning to vacuumize in order to keep the intensity of welding glass.
If temperature reaches working temperature, then under this temperature, continue to vacuumize, and air is discharged from the inside 15 of cathode ray tube 10 fully.
Therebetween, in deairing step, must be with fixedly glass screen and funnel such as fixture, so that when frit seal, keep their normal position.
Preset time reduces treatment box 12 temperature inside in the past thereby after having carried out bleeding fully.
When the temperature of treatment box 12 is reduced to the temperature that the welding glass of weld can bear atmospheric pressure, for example 150 ℃ the time, shown in Fig. 8 B, stop to vacuumize of second vacuum pump 14, so that allow its gas leakage, make the outside 16 of treatment box 12 inside that is cathode ray tube 10 be under the atmospheric pressure.
At this moment, the inside 15 of first vacuum pump, 13 continuation target ray tubes 10 vacuumizes.
Then, cathode ray tube 10 is taken out from treatment box 12, carry out the operation that tip-off seals in the mode that keeps cathode ray tube 10 inside 15 to be in vacuum state then.
More particularly, heater is placed near the ideal position of sealing tail pipe 2a, make the glass melting of tail pipe 2a with this heater heats.Because the inside 15 of cathode ray tube 10 is vacuum,, thereby reach the purpose of sealing so the glass of fusing tightens and sticks together.
Subsequently, shown in Fig. 8 C, tail pipe 2a one end is sealed, is cathode ray tubes 10 of vacuum thereby produce inner 15.
Like this, just, producing inner 15 is evacuated and sealed cathode ray tube 10.
At room temperature, the frit seal material of the weld 8 that glass screen part 1a and funnel part 1b are coupled together has enough intensity, so it can play cathode ray tube 10.
According to present embodiment, the inside 15 of cathode ray tube 10 and outside 16 can be evacuated with first vacuum pump 13 and second vacuum pump 14.Therefore, can reduce pressure differential between cathode ray tube 10 inside and outside.
Thereby especially in deairing step, the load on the frit seal material of weld 8 is reduced.Like this, amorphous welding glass or just can be used as the frit seal material at the welding glass that for example is lower than crystallization under 350 ℃ the temperature makes the frit seal operation to carry out for example being lower than under 350 ℃ the low working temperature.
Then, because can reduce the temperature of frit seal operation, so can be requiring temperature to be reduced to for example below 350 ℃ with the melanism operation of the same high or higher colour selection electrode 3 of the temperature of frit seal operation.
If the temperature of melanism operation reduces, then the tension variation of melanism operation between forward and backward dwindled greatly.As a result, lay 7 o'clock initial tension of colour selection electrode thin plate (the colored baffle of selecting), compare greatly with traditional excessive tension force and reduce, make the framework 6 needed intensity that can reduce colour selection electrode 3.
Therefore, can simplify this structure, make that the weight of colour selection electrode is alleviated, so that realize the light weight of cathode ray tube by the rigidity that reduces framework 6.
In addition, because reduced the temperature of melanism operation and frit seal operation, so, the consuming cost of the required heating of stove work and update system and illumination cost and production equipment can be reduced, can shorten the time interval of temperature cycles, make operating efficiency be improved.
Another embodiment of various details.
Present embodiment relates to only being provided with near weld 8 vacuumizes the situation of the device of usefulness for cathode ray tube 10 outsides.
Fig. 9 represents the schematic diagram according to the structure of the production equipment of the cathode ray tube of this embodiment of the present invention.
In production equipment 21, the part that treatment box 22 covers near the weld 8 of cathode ray tube 10, in other words, the part of funnel part 1b and glass screen part 1a.
Then, image pattern 1 is the same, and the inside 23 of treatment box 22 is connected to second vacuum pump 14.
Other structures are identical with the production equipment 11 of the foregoing description, therefore, add identical label, and omit the description of its repetition.
Because according to present embodiment, 22 of treatment boxes be arranged on weld 8 near, so inner 23 volume is less.
Like this, be convenient to vacuumize, and the space that vacuumizes is less the feasible structure that can simplify treatment box 22 by second vacuum pump 14.
The invention is not restricted to above-mentioned each embodiment, but can be within the scope of the invention, under the situation that does not break away from spirit of the present invention, with the whole bag of tricks change.
According to above-mentioned the present invention, the pressure differential in exhaust/sealing process between cathode ray tube interior and the outside can reduce.Therefore, the load that is added in the weld that glass screen and funnel are linked together can alleviate.
So the welding glass that utilizes amorphous welding glass or crystallization under lower temperature is as encapsulant, the frit seal operation can be carried out under low working temperature.
In addition, because the temperature of frit seal operation can reduce, so the melanism process temperature of colour selection electrode also can reduce.
Therefore, the tension variation handled between forward and backward of melanism can reduce greatly.So compare and to reduce initial tension greatly with traditional excessive tension force, make the required intensity of colour selection electrode framework also can reduce.
Therefore, simplify described structure, make the weight of colour selection electrode to alleviate, and then cause alleviating of cathode ray tube weight by reducing frame rigidity.
Described most preferred embodiment of the present invention with reference to the accompanying drawings, should be understood that, the invention is not restricted to the foregoing description, under situation about not breaking away from as the defined the spirit and scope of the present invention of appended claim book, the professional and technical personnel can make variations and modifications to it.
Claims (4)
1. the manufacture method of a cathode ray tube, wherein the eliminating of air is by inside and outside the vacuumizing of described cathode ray tube realized in its exhaust/sealing process.
2. the manufacturing equipment of a cathode ray tube wherein is provided with the device that the weld that is used for giving from the outside cathode ray tube vacuumizes in its exhaust/sealing device.
3. cathode ray tube, wherein the glass screen is connected with the amorphous welding glass with funnel.
4. cathode ray tube wherein is provided with and a kind ofly carries out the colour selection electrode that melanism is handled being lower than under 350 ℃ the temperature.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30717899A JP2001126618A (en) | 1999-10-28 | 1999-10-28 | Method and apparatus of manufacturing cathode ray tube and cathode ray tube |
| JP307178/1999 | 1999-10-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1303115A true CN1303115A (en) | 2001-07-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00133773 Pending CN1303115A (en) | 1999-10-28 | 2000-10-30 | Production method and production equipment of cathode ray tube and cathode ray tube |
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| Country | Link |
|---|---|
| EP (1) | EP1096535A2 (en) |
| JP (1) | JP2001126618A (en) |
| KR (1) | KR20010040198A (en) |
| CN (1) | CN1303115A (en) |
| TW (1) | TW480540B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7108573B2 (en) | 2002-10-17 | 2006-09-19 | Canon Kabushiki Kaisha | Sealed container, manufacturing method therefor, gas measuring method, and gas measuring apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59149629A (en) * | 1983-02-14 | 1984-08-27 | Toshiba Corp | Manufacture of cathode ray tube |
| JPH08138540A (en) * | 1994-11-14 | 1996-05-31 | Matsushita Electron Corp | Manufacture of color picture tube press molding |
| JPH08293254A (en) * | 1995-04-24 | 1996-11-05 | Ryuji Ozawa | Vacuum sealing of miniature cathode-ray tube |
| KR100298227B1 (en) * | 1997-02-14 | 2001-10-24 | 빌.씨. 첸(Bill. C. Chen) | Vacuum sealing method of cathode ray tube |
-
1999
- 1999-10-28 JP JP30717899A patent/JP2001126618A/en active Pending
-
2000
- 2000-10-19 TW TW89121949A patent/TW480540B/en not_active IP Right Cessation
- 2000-10-27 KR KR1020000063516A patent/KR20010040198A/en not_active Application Discontinuation
- 2000-10-27 EP EP20000402996 patent/EP1096535A2/en not_active Withdrawn
- 2000-10-30 CN CN 00133773 patent/CN1303115A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7108573B2 (en) | 2002-10-17 | 2006-09-19 | Canon Kabushiki Kaisha | Sealed container, manufacturing method therefor, gas measuring method, and gas measuring apparatus |
| US7308819B2 (en) | 2002-10-17 | 2007-12-18 | Canon Kabushiki Kaisha | Gas measuring method inside a sealed container |
| US7679279B2 (en) | 2002-10-17 | 2010-03-16 | Canon Kabushiki Kaisha | Image display device having a sealed container with an exhaust pipe |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2001126618A (en) | 2001-05-11 |
| KR20010040198A (en) | 2001-05-15 |
| TW480540B (en) | 2002-03-21 |
| EP1096535A2 (en) | 2001-05-02 |
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