CN1097285C - Phosphor slurry for use in producing a low-velocity electron-excited phosphor layer in a fluorescent-display device... - Google Patents
Phosphor slurry for use in producing a low-velocity electron-excited phosphor layer in a fluorescent-display device... Download PDFInfo
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- CN1097285C CN1097285C CN94117297A CN94117297A CN1097285C CN 1097285 C CN1097285 C CN 1097285C CN 94117297 A CN94117297 A CN 94117297A CN 94117297 A CN94117297 A CN 94117297A CN 1097285 C CN1097285 C CN 1097285C
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- Prior art keywords
- fluorescence coating
- fluorescent material
- fluorescent
- fluorescence
- coating according
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Classifications
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/02—Use of particular materials as binders, particle coatings or suspension media therefor
- C09K11/025—Use of particular materials as binders, particle coatings or suspension media therefor non-luminescent particle coatings or suspension media
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
- C09K11/64—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing aluminium
- C09K11/641—Chalcogenides
- C09K11/642—Chalcogenides with zinc or cadmium
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Luminescent Compositions (AREA)
- Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
- Formation Of Various Coating Films On Cathode Ray Tubes And Lamps (AREA)
Abstract
The invention provides a fluorescent screen emitting light in high luminous efficiency by an electron beam of 0.1 to 2KV accelerating voltage. A heat resistant protecting layer is formed of potassium silicate, silica, Zn in a surface of phosphor grains. Photosensitive resin having a styrilpyridinium sensitive group is mixed with the phosphor grain to form a slurry liquid. The slurry liquid is used to form a fluorescent screen by a prescribed pattern on a substrate by a photolithographic method. The substrate formed with the fluorescent screen is burned at 450 to 480 deg.C. The photosensitive resin is provided with high heat stability but heat decomposed by high temperature burning.
Description
The present invention relates to fluorescence coating and prepare the method for fluorescence coating, more particularly, the present invention relates to excite and radiative fluorescence coating owing to the electron bombard that accelerating voltage quickened of the about 0.1～2KV of employing, and with the method for this fluorescence coating of photosensitive resins.
Have the fluorescence coating of full-colour image fluorescence display of the image grid of many emission red, green and blues (R, G and B) three coloured light, formed by following these fluorescent materials, for example, red (R) fluorescent material is by Y
2O
2S:Eu forms, and the volume of activation of Eu is 1 * 10
-2～1.5 * 10
-1Gram/gram (1～15%); Green (G) fluorescent material is made up of ZnS:Cu and Al, and the volume of activation of Cu is 150ppm; Blue look (B) fluorescent material is made up of ZnS:Ag and Al, and the volume of activation of Ag is 200ppm, and volume of activation all is meant the weight based on fluorescent material.
In the Display Technique field, use the device that fluorescence coating is arranged in the display.Use fluorescent material to constitute the whole bag of tricks of the fluorescence coating of preset pattern in all known road of this technical field people.If yet as the fluorescence coating of above-mentioned full-colour image fluorescence display, use the fluorescent material of three kinds of red, green and blues (R, G and B) and constitute fluorescence coating with predetermined pattern, then preferably do not adopt the electronic deposition method, adopt this method that the physical attachment of nonessential fluorescent material can take place inevitably.People know slurry method (the flat 5-307931 of Japan Patent Publication Laid-Open, the application people is a Toshiba Corporation) be a kind of when producing color cathode ray tube, make red, green and blue (R, G and B) fluorescent material constitute the method for high-resolution pattern, this method can be used for occasion above-mentioned.
According to this slurry method, ammonium dichromate at first is blended in the water-soluble poval as a kind of photosensitive resin, obtains the aqueous solution of photosensitive resin like this.Fluorescent grain is mixed in this aqueous solution, obtains a kind of slurry liquid.
Above-mentioned slurries are coated on the object such as glass basis equably, form one deck fluorescence coating, dry then.This matrix is sheltered cover by preset pattern and is carried out ultraviolet irradiation, and just the part fluorescence coating is subjected to ultraviolet irradiation.When using three kinds of fluorescent materials of red, green and blue (R, G and B), said method is wanted triplicate.
After this, glass basis was fused 10～20 minutes polyvinyl alcohol and ammonium dichromate generation thermal decomposition under 430～450 ℃ of temperature.Decomposed product evaporation is removed, and obtains fluorescence coating.
If as photoactive substance, because ammonium dichromate contains Cr, the oxide (CrO) of chromium is stayed the surface of fluorescence coating sometimes after the matrix sintering with ammonium dichromate.People know, and a spot of chromium or the analog that only contain in fluorescent material are photoemissive inhibitor, i.e. " inhibitory action ".When with high-velocity electron beam fluorescence excitation material, send light from the inside of fluorescent material, as under the situation of cathode ray tube (CRT), inhibitory action does not appear.This is because electron beam penetrates into the inside of fluorescent material, makes and sends light from the inside and the surface of fluorescent material, even when being attached with inhibitor component on the surface of fluorescent material.Yet (for example accelerating voltage is under the situation of 0.1～2KV) radiative fluorescent material, because this inhibitory action, the optical efficiency of radiation may reduce more than 50% or 50% at the electron beam with suitable low speed.
Do not have the above-mentioned inhibiting other method that is used to form fluorescent surface on the face, known have stibazole group (PVA-SbQ) method (investing the Japan Patent 2837619 of Futaba Denshi Kogyo Kabushiki Kaisha on October 9th, 1998).The photoactive substance that uses in this method is water miscible photosensitive resin, and it makes main chain with polyvinyl alcohol, and the stibazole group is made the side chain photosensitive group.The following chemical formulation of PVA-SbQ photosensitive resin:
(wherein R can be that hydrogen atom, alkyl or rudimentary hydroxyalkyl and X are the anion of strong acid).
Use the method for this photoactive substance identical, use ammonium dichromate in the slurry method as photoactive substance with slurry method.
Above-mentioned PVA-SbQ method does not relate to the relevant above-mentioned defective of ammonium dichromate.But SbQ radical reaction and polymerization when ultraviolet irradiation generate the high resin of thermal stability.Therefore, the SbQ group is in temperature thermal decomposition fully below 450 ℃ or 450 ℃, and this point is different with ammonium dichromate.Thereby when resulting resin during in temperature roasting below 450 ℃ or 450 ℃, binder component is attached to the surface of fluorescent material, perhaps because remaining binder component absorption former thereby hinder fluorescent material emission light.
When sintering temperature is elevated to about 480 ℃, the thermal decomposition fully of above-mentioned resin.But in this case, the surface of fluorescent material surface, especially sulfide fluorescent substance is heated and is oxidized.Because the surface emitting light of the electron-beam excitation fluorescent grain of the suitable low speed of use as described above, when sintering temperature is elevated to more than 450 ℃ or 450 ℃ so that when making the complete thermal decomposition of resin, then fluorescent material is surperficial oxidized, has therefore occurred the other problem that optical efficiency reduces again.
There is another problem with the above-described like this fluorescence coating that a kind of mode was generated, promptly do not have enough fluorescence coating adhesive strengths.
The purpose of this invention is to provide a kind of fluorescence coating, it does not have the Cr inhibitor component that exists in the prior art, this inhibitor component is to be produced by the ammonium dichromate as light-sensitive material, this fluorescence coating can be at 450 ℃-550 ℃ sintering temperature so that fluorescent grain can not be subjected to thermal oxidation, its particle is thin and high adhesion force is arranged, can be with high optical efficiency emission light when using suitable low-velocity electron beam (for example accelerating voltage is 0.1-2kv).The present invention also provides the method for preparing this fluorescence coating.
Fluorescence coating comprises the fluorescent grain that is formed with the refractory protection that consists of potassium silicate, silicon dioxide and zinc in its surface and has the photosensitive resin of stibazole photosensitive group.
The method for preparing fluorescence coating comprises the steps: to prepare the fluorescent grain with refractory protection, and this refractory protection is to add potassium silicate, silicon dioxide and zinc and form on fluorescent grain by the fluorescent grain in being dispersed in pure water; The photosensitive resin that will have the stibazole group mixes formation fluorescence slurry with fluorescent grain; Adopt photolithographic techniques the fluorescence slurry to be formed the fluorescence coating of preset pattern on matrix; Be formed with the matrix of fluorescence coating on it at temperature sintering more than 450 ℃ or 450 ℃.
Other purpose of the present invention and characteristics are clearer by the preferred embodiment that describes in detail below.
Concrete scheme
Adopting accelerating voltage is that the formation of fluorescence coating of the concrete scheme of the present invention of electron beam emission high-luminance light of 0.1～2KV and the method for preparing this fluorescence coating will be described in down.At first, constitute the concentration of activator in the fluorescent material of formation fluorescence coating of this concrete scheme based on the present inventor's knowledge description.
Under photoemissive situation with the above-mentioned red, green and blue that low-velocity electron beam produced (R, G and the B) fluorescent material below 100 volts or 100 volts, normally mixed in the fluorescent material have approximately a few percent such as In
2O
3And so on conductive materials, therefore reduced impedance.
Therefore, the volume of activation of Cu or Ag is restricted to about 150～200ppm, and there is no need to increase this amount.
But, according to the present invention, when the electron beam that adopts several hectovolts of accelerating voltage (as in 0.1～2KV scope) to be quickened and from the fluorescent material emission light time, when the volume of activation that uses approaches to be used for the volume of activation of the radiative fluorescent material of high-velocity electron beam of TV (TV), can improve the emission brightness of this fluorescent material.
Secondly, in that corresponding glow color is arranged is in the fluorescent material of R, G and B form, the electron beam that adopts accelerating voltage 0.1～2KV to quicken is launched light from this fluorescent material, the example of volume of activation can exemplify as follows, adopt this volume of activation, radiative brightness is than illustrated higher under normal conditions.
Red: Y
2O
2S:Eu: the volume of activation of europium is 1 * 10
-2～1.5 * 10
-1Gram/gram
Green: ZnS:Cu, Al: the volume of activation of copper is 600～1500ppm
The volume of activation of aluminium is 500～1500ppm
Blue: ZnS:Ag, Al: the volume of activation of silver is 1000～3000ppm
The volume of activation of aluminium is 400～900ppm
The fluorescent material of this programme forms by this way, promptly with potassium silicate, silicon dioxide and zinc above-mentioned fluorescent material is carried out heat-resisting processing, and forms the protective layer of being made up of these materials on each fluorescent grain.Therefore, even the fluorescent material of being made up of fluorescent grain sintering at high temperature, the fluorescent grain surface can be not oxidized yet.
In addition, the fluorescent material of this programme is little of 2～8 μ m by each granularity, and the fluorescent grain of best 2～4 μ m is formed.Therefore, when fluorescent material was made the fluorescence coating of preset pattern, fluorescent material composition ability was fabulous, and its structure also is accurately, and the adhesive force between the fluorescent grain is very strong, and the intensity of fluorescence coating is high.
In addition, constitute the preparation method of the fluorescent material of this programme fluorescence coating, will more specifically illustrate by the embodiment of two kinds of fluorescent materials:
Embodiment 1 (by ZnS:Cu, the fluorescent material that Al forms)
1, the preparation of raw material
Flux with suitable adds among the ZnS as 600～1500ppm Cu, 1000～1500ppm Al and NaCl analog, therefore prepares raw material.As embodiment, in 1 kilogram of ZnS, add 2.51 gram CuSO
4(being converted into 1000ppm copper), 5.38 gram Al
2(SO
4)
3(being converted into 850ppm Al) and 1 gram NaCl are as flux, and wet mixed is also dry then.Here, when changing the Cu amount, the Al amount also changes thereupon, so that have above-mentioned same ratio.
2, sintering
Above-mentioned raw material is transferred in the crucible, and at H
2Under the reducing atmosphere of S in 800～1000 ℃ of sintering temperatures.As an example, it is in 1 liter the silica crucible that above-mentioned raw materials is transferred to capacity, and at H
2Under the reducing atmosphere of S in 900 ℃ of sintering temperatures.In this case, regulate sintering temperature according to the granularity of handled fluorescent material.Granularity is big more, and sintering temperature is high more.Granularity is more little, and sintering temperature is low more.
3, handle
Stir 5 liters of pure water on one side, toward water in add 1 kilogram above-mentioned fluorescence or phosphorus on one side.Solution was stirred 30 minutes, remove excessive flux by the washing operation washing, this washing operation repeats five times.
In the above-mentioned fluorescent material that has washed, add 5 liters of pure water.Used ultrasonic wave 30 minutes, fluorescent material is disperseed, and aggregation is reduced.
In order to prevent that fluorescent material is degraded in heat treatment process, potassium silicate, silica (granularity is 50nm) and zinc are added in the fluorescent material that is dispersed in the pure water.Then, make these materials wrap up the surface of fluorescent materials by pH being adjusted to 7.4.As an example, 5 gram potassium silicates (are converted into 0.1 gram SiO
2) and silica be added in the fluorescent material in the water, then, on one side stir, drip ZnSO on one side inward
4Solution (containing 0.5 gram Zn) is transferred to 7.4 with ammoniacal liquor with pH again.
Stable coatings characteristic when preparing fluorescence coating, after dehydration, drying, fluorescent material screens with nylon #460, removes the bulky grain of drying.Particle with fluorescent material is adjusted to the predetermined granularity of tool like this.Therefore, coating characteristic improves when the preparation fluorescence coating, and the bond strength of prepared fluorescent film is improved.
Example II (by ZnS:Ag, the fluorescent material that Al forms)
1, the preparation of raw material
In ZnS, add an amount of flux,, therefore, prepare raw material as 1000～3000ppm Ag, 900～1400ppm Al and NaCl or analog.As an example, 1 kilogram of ZnS, 2.05 gram Ag
2SO
4(being converted into 1500ppm Ag), 4.75 gram Al
2(SO
4)
3(being converted into 750ppm Al) and 1 gram NaCl (adding with flux) wet mixing merge dry.Here, when changing the Ag amount, the Al amount also changes thereupon, so that identical with above-mentioned ratio.
2, sintering
Above-mentioned raw material is transferred in the crucible, and at H
2Under the reducing atmosphere of S in 800～1000 ℃ of sintering temperatures.As an example, it is in 1 liter the silica crucible that above-mentioned raw materials is transferred to capacity, and at H
2Under the reducing atmosphere of S in 900 ℃ of sintering temperatures.In this case, regulate sintering temperature according to the granularity of handled fluorescent material.Granularity is more little, and sintering temperature is high more.
3, handle
Stir 5 liters of pure water on one side, toward water in add 1 kilogram fluorescent material on one side.Solution stirred 30 minutes, and the excessive flux of flush away.This washing operation repeats five times.
Pure water is added in the fluorescent material that has washed so that total amount is 5 liters.Disperseed fluorescent material 30 minutes with ultrasonic wave, aggregation is reduced.
In order to prevent that fluorescent material is degraded in heat treatment process, in the above-mentioned fluorescent material that is dispersed in the pure water, add potassium silicate, silica (granularity is 50nm) and Zn, therefore pH is adjusted to 7.4.Like this, with the surface of fluorescent material with these material coateds.As an example, (be converted into 0.1 gram SiO at potassium silicate
2) and after 5 gram silicas are added in the fluorescent material in the water, on one side agitating solution, drip ZnSO on one side inward
4Solution (containing 0.5 gram Zn).After this, with ammoniacal liquor pH is adjusted to 7.4.
For stable coatings characteristic when preparing fluorescence coating, after dehydration and drying,, removed bulky grain like this with nylon #460 screening fluorescent material.The particle of fluorescent material will be adjusted to has predetermined granularity.Like this, coating characteristic improves during the coating of preparation fluorescence coating, and the bond strength of Zhi Bei fluorescence coating is improved like this.
Then, be added with 1～5% as the polyvinyl alcohol of the styryl pyridine group (SbQ) of photosensitive group as photosensitive resin, use above-mentioned fluorescent material, make slurries like this with ratio of component as described below.
Fluorescent material 25% (weight)
PVA-SbQ 10% (weight)
Dispersant (surfactant) 0.2% (weight)
Pure water 64.8% (weight)
Fluorescent material for sending out red, green and blue (R, G and B) light respectively prepares above-mentioned slurries respectively.As for every kind of slurries, on glass basis, form predetermined pattern according to known photolithography.After forming the fluorescent material style, above-mentioned glass basis is preferably 450～480 ℃ of sintering temperatures 20 minutes under the temperature more than 450 ℃ or 450 ℃.
According to the present embodiment, the inhibitor component that reduces the fluorescent material luminous efficiency is not included among the raw material that constitutes fluorescent material.In addition, employed PVA-SbQ as photosensitive resin is being extraordinary aspect the thermal stability in the present embodiment, therefore can be than carrying out sintering under the higher temperature of the conventional method of making sensitising agent with ammonium dichromate, therefore, because high temperature, PVA-SbQ is by thermal decomposition up hill and dale.If remain the binder component of PVA-SbQ down like this, also can not reduce the emission brightness of fluorescent material.At this moment, when at quite high sintering temperature PVA-SbQ, fluorescent material surperficial not oxidized is because each particle that constitutes fluorescent material according to this programme is all wrapped up by refractory protection.About this point, the danger that the luminous efficiency of fluorescent material suffers damage is non-existent.
According to the present invention, because fluorescent material wraps up with refractory protection, after use did not have inhibitor component and has the photosensitive resin body plan style of SbQ group, the SbQ group was because of by being thermal decomposited fully at quite low sintering temperature fluorescent material.Therefore, can obtain by accelerating to accelerating voltage is that the electron beam of 0.1～2KV is launched the fluorescence coating of high-luminance light.
Describing in conjunction with preferred embodiment when of the present invention, be to be appreciated that and make change and revise and do not exceed the scope of claims.
Claims (9)
1, a kind of fluorescence coating, it comprises:
Fluorescent grain is formed with the refractory protection that consists of potassium silicate, silicon dioxide and zinc in its surface, and
Photosensitive resin with styryl pyridine photosensitive group.
2, fluorescence coating according to claim 1, wherein said fluorescent grain granularity are 2～8 μ m.
3, fluorescence coating according to claim 1 wherein also comprises the conductive materials that mixes with described fluorescent grain.
4, fluorescence coating according to claim 3, wherein said conductive materials is In
2O
3
5, fluorescence coating according to claim 1 wherein also comprises the activating component of a kind of Cu of being selected from, Al, Ag, Eu and their any compositions.
6, fluorescence coating according to claim 5, the amount of wherein said activating component, copper is 600～1500ppm, aluminium is 500～1500ppm, based on the weight of fluorescent material.
7, fluorescence coating according to claim 5, the amount of wherein said activating component, silver is 1000～3000ppm, aluminium is 400～900ppm, based on the weight of fluorescent material.
8, fluorescence coating according to claim 5, wherein the amount to the described activating component of described europium is 1 * 10
-2～1.5 * 10
-1Gram/gram fluorescent material.
9, prepare the method for fluorescence coating, comprising:
Prepare the fluorescent grain that is coated with refractory protection on it, described refractory protection is to add potassium silicate, silicon dioxide and zinc by the described fluorescent grain in being dispersed in pure water to form on described fluorescent grain;
The photosensitive resin that will have the styryl pyridine photosensitive group mixes with described fluorescent grain to form the fluorescence slurry;
Adopt photolithography on matrix, the fluorescence slurry to be made predetermined pattern and formed fluorescence coating; And
To form the described matrix of described fluorescence coating thereon in the sintering temperature more than 450 ℃ or 450 ℃.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5-257928 | 1993-10-15 | ||
| JP25792893A JPH07114898A (en) | 1993-10-15 | 1993-10-15 | Fluorescent screen and its forming method |
| JP5257928 | 1993-10-15 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1111807A CN1111807A (en) | 1995-11-15 |
| CN1097285C true CN1097285C (en) | 2002-12-25 |
Family
ID=17313147
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN94117297A Expired - Fee Related CN1097285C (en) | 1993-10-15 | 1994-10-15 | Phosphor slurry for use in producing a low-velocity electron-excited phosphor layer in a fluorescent-display device... |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JPH07114898A (en) |
| KR (1) | KR100191560B1 (en) |
| CN (1) | CN1097285C (en) |
| FR (1) | FR2711272A1 (en) |
| TW (1) | TW336253B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5994008A (en) * | 1996-04-18 | 1999-11-30 | Futaba Denshi Kogyo K.K. | Composition for forming fluorescent film for display and method of forming fluorescent film for display |
| KR100229316B1 (en) * | 1996-10-14 | 1999-11-01 | 구자홍 | A phosphor layer slurry compound of color crt |
| FR2867897A1 (en) * | 2004-03-22 | 2005-09-23 | Saint Gobain | Illumination system comprises luminophore particles dispersed in durable solid matrix, permitting manipulation by user |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3887753A (en) * | 1966-07-22 | 1975-06-03 | Matsushita Electronics Corp | Fluorescent film for color picture tube and process of preparing same |
| EP0457337A2 (en) * | 1990-05-18 | 1991-11-21 | Kasei Optonix, Ltd. | Color cathode-ray tube, and surface-treated phosphor and method for its production |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5559649A (en) * | 1978-10-26 | 1980-05-06 | Toshiba Corp | Quick start fluorescent lamp |
| EP0081680B1 (en) * | 1981-12-11 | 1987-08-26 | Kabushiki Kaisha Toshiba | Composition for and method of making picture tube fluorescent screen |
| JPS58164677A (en) * | 1982-03-25 | 1983-09-29 | Toshiba Corp | Composition and method for forming fluorescent screen on picture tube |
| JPS5949278A (en) * | 1982-09-14 | 1984-03-21 | Toshiba Corp | Formation of fluorescent face of color picture tube |
| JP3007893B2 (en) * | 1990-07-09 | 2000-02-07 | 化成オプトニクス株式会社 | Light emitting composition for slow electron beam |
| JP2837619B2 (en) * | 1993-09-27 | 1998-12-16 | 双葉電子工業株式会社 | Photosensitive composition for forming phosphor screen |
-
1993
- 1993-10-15 JP JP25792893A patent/JPH07114898A/en active Pending
-
1994
- 1994-10-14 FR FR9412266A patent/FR2711272A1/en active Granted
- 1994-10-15 CN CN94117297A patent/CN1097285C/en not_active Expired - Fee Related
- 1994-10-15 KR KR1019940026461A patent/KR100191560B1/en not_active IP Right Cessation
- 1994-10-17 TW TW083109596A patent/TW336253B/en active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3887753A (en) * | 1966-07-22 | 1975-06-03 | Matsushita Electronics Corp | Fluorescent film for color picture tube and process of preparing same |
| EP0457337A2 (en) * | 1990-05-18 | 1991-11-21 | Kasei Optonix, Ltd. | Color cathode-ray tube, and surface-treated phosphor and method for its production |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2711272A1 (en) | 1995-04-21 |
| JPH07114898A (en) | 1995-05-02 |
| KR100191560B1 (en) | 1999-06-15 |
| FR2711272B1 (en) | 1997-02-28 |
| CN1111807A (en) | 1995-11-15 |
| TW336253B (en) | 1998-07-11 |
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