KR100294506B1 - Green emitting phosphor compositions and projection type cathod-ray tube having phosphor layer manufactured using the same - Google Patents
Green emitting phosphor compositions and projection type cathod-ray tube having phosphor layer manufactured using the same Download PDFInfo
- Publication number
- KR100294506B1 KR100294506B1 KR1019990025807A KR19990025807A KR100294506B1 KR 100294506 B1 KR100294506 B1 KR 100294506B1 KR 1019990025807 A KR1019990025807 A KR 1019990025807A KR 19990025807 A KR19990025807 A KR 19990025807A KR 100294506 B1 KR100294506 B1 KR 100294506B1
- Authority
- KR
- South Korea
- Prior art keywords
- phosphor
- luminance
- green light
- light emitting
- srga
- Prior art date
Links
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 title claims abstract description 142
- 239000000203 mixture Substances 0.000 title claims abstract description 31
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 33
- 229910052733 gallium Inorganic materials 0.000 claims abstract description 31
- 229910002420 LaOCl Inorganic materials 0.000 claims abstract description 21
- 238000000034 method Methods 0.000 claims description 4
- QVMHUALAQYRRBM-UHFFFAOYSA-N [P].[P] Chemical compound [P].[P] QVMHUALAQYRRBM-UHFFFAOYSA-N 0.000 claims 1
- 230000006866 deterioration Effects 0.000 abstract description 19
- 229910004283 SiO 4 Inorganic materials 0.000 description 28
- 230000000052 comparative effect Effects 0.000 description 14
- 230000014759 maintenance of location Effects 0.000 description 9
- 229910052771 Terbium Inorganic materials 0.000 description 6
- 238000011156 evaluation Methods 0.000 description 4
- 238000004020 luminiscence type Methods 0.000 description 4
- 230000015556 catabolic process Effects 0.000 description 3
- 238000006731 degradation reaction Methods 0.000 description 3
- FAPWRFPIFSIZLT-UHFFFAOYSA-M sodium chloride Inorganic materials [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 3
- 230000001133 acceleration Effects 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- JHJLBTNAGRQEKS-UHFFFAOYSA-M sodium bromide Chemical compound [Na+].[Br-] JHJLBTNAGRQEKS-UHFFFAOYSA-M 0.000 description 2
- UBXAKNTVXQMEAG-UHFFFAOYSA-L strontium sulfate Chemical compound [Sr+2].[O-]S([O-])(=O)=O UBXAKNTVXQMEAG-UHFFFAOYSA-L 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonium chloride Substances [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- 229910052688 Gadolinium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 235000019270 ammonium chloride Nutrition 0.000 description 1
- -1 color purity Chemical compound 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- AJNVQOSZGJRYEI-UHFFFAOYSA-N digallium;oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Ga+3].[Ga+3] AJNVQOSZGJRYEI-UHFFFAOYSA-N 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 229910001940 europium oxide Inorganic materials 0.000 description 1
- AEBZCFFCDTZXHP-UHFFFAOYSA-N europium(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Eu+3].[Eu+3] AEBZCFFCDTZXHP-UHFFFAOYSA-N 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 150000002258 gallium Chemical class 0.000 description 1
- 229910001195 gallium oxide Inorganic materials 0.000 description 1
- 229910000373 gallium sulfate Inorganic materials 0.000 description 1
- SBDRYJMIQMDXRH-UHFFFAOYSA-N gallium;sulfuric acid Chemical compound [Ga].OS(O)(=O)=O SBDRYJMIQMDXRH-UHFFFAOYSA-N 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 1
- BDAGIHXWWSANSR-NJFSPNSNSA-N hydroxyformaldehyde Chemical compound O[14CH]=O BDAGIHXWWSANSR-NJFSPNSNSA-N 0.000 description 1
- 239000004922 lacquer Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 229910000018 strontium carbonate Inorganic materials 0.000 description 1
- 159000000008 strontium salts Chemical class 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- 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
- C09K11/77—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals
- C09K11/7783—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals containing two or more rare earth metals one of which being europium
- C09K11/7784—Chalcogenides
- C09K11/7786—Chalcogenides with alkaline earth metals
-
- 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
- C09K11/62—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing gallium, indium or thallium
- C09K11/621—Chalcogenides
-
- 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
- C09K11/77—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals
- C09K11/7743—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals containing terbium
- C09K11/7747—Halogenides
-
- 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
- C09K11/77—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals
- C09K11/7743—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals containing terbium
- C09K11/7749—Aluminates
-
- 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
- C09K11/77—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals
- C09K11/7766—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals containing two or more rare earth metals
- C09K11/7767—Chalcogenides
- C09K11/7769—Oxides
- C09K11/777—Oxyhalogenides
-
- 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
- C09K11/77—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals
- C09K11/7766—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals containing two or more rare earth metals
- C09K11/7774—Aluminates
-
- 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
- C09K11/77—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals
- C09K11/7783—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals containing two or more rare earth metals one of which being europium
- C09K11/7792—Aluminates
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
- H01J29/02—Electrodes; Screens; Mounting, supporting, spacing or insulating thereof
- H01J29/10—Screens on or from which an image or pattern is formed, picked up, converted or stored
- H01J29/18—Luminescent screens
- H01J29/20—Luminescent screens characterised by the luminescent material
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
Landscapes
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Luminescent Compositions (AREA)
Abstract
본 발명은 녹색 발광 형광체 조성물 및 이를 이용하여 제조된 형광막을 구비한 음극선관을 개시한다. SrGa2S4:Eu 형광체 5 내지 20중량%, Y3(Al,Ga)5O12:Tb 형광체 60 내지 90중량% 및 LaOCl:Tb 형광체 5 내지 20중량%를 포함하는 것을 특징으로 하는 본 발명의 녹색 발광 형광체 조성물은 색순도, 휘도특성 및 열화특성이 모두 양호하여 투사형 음극선관을 제조하는데 유용하다.The present invention discloses a cathode ray tube having a green light emitting phosphor composition and a fluorescent film prepared using the same. 5 to 20% by weight of SrGa 2 S 4 : Eu phosphor, 60 to 90% by weight of Y 3 (Al, Ga) 5 O 12 : Tb phosphor and 5 to 20% by weight of LaOCl: Tb phosphor The green light emitting phosphor composition has excellent color purity, luminance characteristics and deterioration characteristics, and is useful for producing a projection type cathode ray tube.
Description
본 발명은 녹색 발광 형광체 조성물 및 이를 이용하여 제조된 형광막을 구비한 음극선관에 관한 것으로서, 더욱 상세하게는 열화특성이 양호할 뿐만 아니라 휘도 및 색순도가 모두 개선된 녹색 발광 형광체 조성물 및 이를 이용하여 제조된 음극선관에 관한 것이다.The present invention relates to a green light emitting phosphor composition and a cathode ray tube having a fluorescent film prepared using the same, and more particularly, to a green light emitting phosphor composition having good deterioration characteristics as well as improved luminance and color purity. It relates to a cathode ray tube.
최근 고화질TV(high density television ; HDTV) 방송의 시작과 함께 40' 이상의 대화면을 구현할 수 있는 투사형 음극선관(projection type cathode ray tube)에 대한 수요가 가정용뿐만 아니라 업무용으로서도 증가하고 있다. 투사형 음극선관의 경우에는 40' 또는 52' 이상의 대화면으로 영상이 투사되므로 투사형 음극선관의 형광면은 직시형 음극선관의 형광면에 비해 높은 색순도 뿐만 아니라 수배 ~ 수십배의 밝기를 필요로 한다. 따라서, 직시형 음극선관의 경우에 비하여 수배 ~ 수십배의 고전류밀도로 형광면을 여기하여야 하므로 형광체의 손상에 의해 형광면의 휘도가 열화되는 문제점이 있다. 이는 특히 화면 밝기의 약 70%를 차지하는녹색 발광 형광체에서 가장 큰 문제점이 되고 있다.Recently, with the start of high density television (HDTV) broadcasting, the demand for projection type cathode ray tube capable of realizing a large screen of 40 'or more is increasing not only for home use but also for business use. In the case of the projection cathode ray tube, since the image is projected to a large screen of 40 'or 52' or more, the fluorescent surface of the projection cathode ray tube requires not only high color purity but also several times to several tens of times of brightness than the fluorescent surface of the direct cathode ray tube. Therefore, since the fluorescent surface must be excited at a high current density of several times to several tens of times as compared to the case of the direct-type cathode ray tube, there is a problem in that the luminance of the fluorescent surface is deteriorated by the damage of the phosphor. This is especially a problem in the green light emitting phosphor which occupies about 70% of the screen brightness.
현재 통상적으로 사용되고 있는 녹색 발광 형광체로서는 종전의 Y2O2S:Tb, Gd2O2S:Tb, ZnS:Cu,Al 등의 특성을 개선한 Y3Al5O12:Tb, Y3(Al,Ga)5O12:Tb, LaOCl:Tb, Zn2SiO4:Mn, InBO3:Tb, Y2SiO5:Tb 등의 단일물질 형광체가 있다. 그러나, 이러한 단일물질 녹색 발광 형광체는 투사형 음극선관에 요구되는 모든 특성을 동시에 만족시킬 수 없기 때문에 실용적으로는 Y3(Al, Ga)5O12:Tb, Y2SiO5:Tb, 안료부착된 Y3(Al, Ga)5O12:Tb 등의 형광체에 Zn2SiO4:Mn 또는 InBO3:Tb 등의 형광체를 적정비율로 혼합한 혼합 녹색 발광 형광체가 사용되고 있다.Currently used green light emitting phosphors include Y 3 Al 5 O 12 : Tb, Y 3 (which improves the characteristics of conventional Y 2 O 2 S: Tb, Gd 2 O 2 S: Tb, ZnS: Cu, Al, etc.). Al, Ga) 5 O 12 : Tb, LaOCl: Tb, Zn 2 SiO 4 : Mn, InBO 3 : Tb, Y 2 SiO 5 : Tb and the like there is a single substance phosphor. However, since such a single material green light emitting phosphor cannot satisfy all the properties required for the projection cathode ray tube at the same time, practically Y 3 (Al, Ga) 5 O 12 : Tb, Y 2 SiO 5 : Tb, pigments attached Mixed green light emitting phosphors in which phosphors such as Zn 2 SiO 4 : Mn or InBO 3 : Tb are mixed in a proper ratio with phosphors such as Y 3 (Al, Ga) 5 O 12 : Tb are used.
예를 들면, 일본 특개평 4-161483은 휘도특성과 열화특성이 우수하지만 색순도가 불량한 Y3(Al,Ga)5O12:Tb 형광체와 색순도가 매우 양호한 Zn2SiO4:Mn 형광체를 혼합하여 색순도가 개선된 혼합 녹색 발광 형광체를 개시하고 있다. USP 4,559,469도 역시 Y2SiO5:Tb 형광체에 색순도를 개선하기 위해서 Zn2SiO4:Mn 형광체를 혼합시킨 혼합 녹색 발광 형광체를 개시하고 있다.For example, Japanese Patent Laid-Open No. 4-161483 mixes a Y 3 (Al, Ga) 5 O 12 : Tb phosphor having excellent luminance and deterioration characteristics but a poor color purity and a Zn 2 SiO 4 : Mn phosphor having very good color purity. A mixed green light emitting phosphor having improved color purity is disclosed. USP 4,559,469 also discloses a mixed green light emitting phosphor in which a Zn 2 SiO 4 : Mn phosphor is mixed to improve color purity in a Y 2 SiO 5 : Tb phosphor.
그러나, Zn2SiO4:Mn 형광체는 색순도는 우수하나 그외 고전류밀도하에서의 휘도특성, 열화특성, 잔광특성이 모두 불량하다. 따라서, Zn2SiO4:Mn 형광체를 녹색 발광 형광체에 혼합하게 되면 녹색 발광 형광체 조성물의 색순도를 향상시킬 수 있으나, 휘도특성, 열화특성 및 잔광특성이 저하되는 문제점이 있다.However, Zn 2 SiO 4 : Mn phosphors are excellent in color purity but poor in luminance, deterioration and afterglow at high current density. Therefore, when the Zn 2 SiO 4 : Mn phosphor is mixed with the green light emitting phosphor, the color purity of the green light emitting phosphor composition may be improved, but there is a problem in that luminance, deterioration and afterglow characteristics are deteriorated.
따라서, 본 발명이 이루고자 하는 기술적 과제는 상기 문제점을 해결하기 위하여 고전류구동하에서 열화특성이 양호할 뿐만 아니라 휘도특성 및 색순도가 모두 개선된 새로운 녹색 발광 형광체 조성물을 제공하는데 있다.Accordingly, an object of the present invention is to provide a new green light emitting phosphor composition in which not only the deterioration characteristic is good under high current driving but also the luminance characteristic and the color purity are all improved to solve the above problem.
본 발명이 이루고자 하는 다른 기술적 과제는 상기 새로운 형광체 조성물을 이용하여 제조된 형광막을 구비한 투사형 음극선관을 제공하는데 있다.Another object of the present invention is to provide a projection type cathode ray tube having a fluorescent film manufactured using the new phosphor composition.
상기 기술적 과제를 달성하기 위하여 본 발명은 SrGa2S4:Eu 형광체 5 내지 20중량%, Y3(Al,Ga)5O12:Tb 형광체 60 내지 90중량% 및 LaOCl:Tb 형광체 5 내지 20중량%를 포함하는 것을 특징으로 하는 녹색 발광 형광체 조성물을 제공한다.In order to achieve the above technical problem, the present invention provides 5 to 20% by weight of SrGa 2 S 4 : Eu phosphor, 60 to 90% by weight of Y 3 (Al, Ga) 5 O 12 : Tb phosphor, and 5 to 20% by weight of LaOCl: Tb phosphor. It provides a green light emitting phosphor composition comprising a%.
상기 다른 기술적 과제를 달성하기 위해서 본 발명은 상기 녹색 발광 형광체 조성물을 이용하여 제조된 형광막을 구비하는 것을 특징으로 하는 투사형 음극선관을 제공한다.In order to achieve the above another technical problem, the present invention provides a projection type cathode ray tube comprising a fluorescent film prepared using the green light emitting phosphor composition.
이하에서는 본 발명에 따른 녹색 발광 형광체 조성물 및 그 제조방법을 보다 상세하게 설명하고자 한다.Hereinafter, a green light emitting phosphor composition and a method of manufacturing the same according to the present invention will be described in detail.
본 발명에 따른 녹색 발광 형광체 조성물에 있어서, SrGa2S4:Eu 형광체는 아래의 방법을 통하여 제조할 수 있다.In the green light emitting phosphor composition according to the present invention, the SrGa 2 S 4 : Eu phosphor may be prepared by the following method.
먼저, 탄산 스트론튬 또는 황산 스트론튬과 같은 스트론튬염 0.5 ~ 1.5몰, 산화갈륨 또는 황산갈륨과 같은 갈륨염 1.5 ~ 2.5몰, 산화 유로피움 0.001 ~ 0.05몰의 비율로 혼합한 후, 여기에 브롬화나트륨, 염화암모늄 또는 염화나트륨과 같은융제를 적당량 더 혼합한다. 이어서, 이 혼합물을 알루미나 용기에 넣고 황화수소가스 분위기하에서 700 ~ 900℃에서 1 ~ 4시간 동안 소성한다. 계속해서, 상기 소성결과물을 냉각, 수세, 건조 및 분급하면 SrGa2S4:Eu 녹색 발광 형광체 분체를 얻을 수 있다.First, 0.5 to 1.5 mol of strontium salts such as strontium carbonate or strontium sulfate, 1.5 to 2.5 mol of gallium salts such as gallium oxide or gallium sulfate, and 0.001 to 0.05 mol of europium oxide are mixed, and then sodium bromide and chloride are added thereto. Add an appropriate amount of flux, such as ammonium or sodium chloride. Subsequently, the mixture is placed in an alumina container and calcined for 1 to 4 hours at 700 to 900 ° C. under hydrogen sulfide gas atmosphere. Subsequently, by cooling, washing, drying, and classifying the firing result, SrGa 2 S 4 : Eu green light emitting phosphor powder can be obtained.
상기 방법으로 제조된 SrGa2S4:Eu 형광체와 종래에 사용되고 있는 Y3(Al,Ga)5O12:Tb, LaOCl:Tb 및 Zn2SiO4:Mn 형광체를 각각 사용하여 침강법에 의해서 스크린막을 제조한 후 음극선관과 같은 구조의 디마운터블 시스템(demountable system, BM-7)을 이용하여 발광특성을 평가하여 그 결과를 아래의 표 1에 나타냈다. 평가조건은 가속전압이 20kV, 구동전류 Ik가 60㎂, 래스터(raster)의 크기는 2.0cm × 2.0cm, 그리고 열화평가시간은 600초이다.SrGa 2 S 4 : Eu phosphor prepared by the above method and Y 3 (Al, Ga) 5 O 12 : Tb, LaOCl: Tb and Zn 2 SiO 4 : Mn phosphors, which are conventionally used, are screened by sedimentation, respectively. After the film was prepared, the luminescence properties were evaluated using a demountable system (BM-7) having the same structure as a cathode ray tube, and the results are shown in Table 1 below. The evaluation conditions are acceleration voltage of 20 kV, drive current I k of 60 mA, raster size of 2.0 cm x 2.0 cm, and degradation evaluation time of 600 seconds.
상기 표 1에서, 휘도1)는 Y3(Al,Ga)5O12:Tb 형광체의 휘도를 100%로 했을 때의 상대휘도를 나타냄.In Table 1, luminance 1) represents relative luminance when the luminance of the Y 3 (Al, Ga) 5 O 12 : Tb phosphor is 100%.
Y3(Al,Ga)5O12:Tb 형광체는 고전압 및 고전류에서 휘도특성 및 열화특성이 양호하나 색순도가 불량하므로, 종래에는 색순도가 양호한 Zn2SiO4:Mn 형광체와 혼합여 사용되었다. 그러나, 상기 표 1을 참조하면, Zn2SiO4:Mn 형광체는 색좌표특성은 우수하나 휘도특성 및 휘도유지율이 매우 낮다. 이에 비해, SrGa2S4:Eu 형광체는 색좌표특성 및 휘도특성이 양호할 뿐만 아니라 휘도유지율도 Zn2SiO4:Mn 형광체에 비하여 상당히 높으므로 이를 혼합한 녹색 발광 형광체 조성물은 양호한 발광특성을 보인다. 다만, SrGa2S4:Eu 형광체의 휘도유지율이 Y3(Al,Ga)5O12:Tb 형광체 및 LaOCl:Tb 형광체에 비해 떨어지므로, 열화특성을 저하시키지 않는 한도내에서 SrGa2S4:Eu 형광체의 함량을 조절하여 혼합하는 것이 필요하다. 또한, 모든 발광특성이 비교적 양호한 LaOCl:Tb 형광체를 혼합하므로써 Y3(Al,Ga)5O12:Tb 형광체의 색순도 및 SrGa2S4:Eu 형광체의 열화특성을 보완할 필요가 있다.The Y 3 (Al, Ga) 5 O 12 : Tb phosphor has good luminance and deterioration characteristics at high voltage and high current, but poor color purity, and thus has been used in combination with a Zn 2 SiO 4 : Mn phosphor having good color purity. However, referring to Table 1, the Zn 2 SiO 4 : Mn phosphor has excellent color coordinate characteristics but very low luminance characteristics and luminance maintenance ratio. On the other hand, the SrGa 2 S 4 : Eu phosphor has not only good color coordinate characteristics and luminance characteristics, but also a relatively high luminance retention compared to the Zn 2 SiO 4 : Mn phosphor, and thus the green light emitting phosphor composition mixed therewith exhibits good emission characteristics. However, since the luminance retention of SrGa 2 S 4 : Eu phosphor is lower than that of Y 3 (Al, Ga) 5 O 12 : Tb phosphor and LaOCl: Tb phosphor, SrGa 2 S 4 : It is necessary to control and mix the content of the Eu phosphor. In addition, it is necessary to compensate for the color purity of the Y 3 (Al, Ga) 5 O 12 : Tb phosphor and the deterioration characteristics of the SrGa 2 S 4 : Eu phosphor by mixing LaOCl: Tb phosphors having relatively good luminescence properties.
상기 표 1의 데이터를 기초로 하여 Zn2SiO4:Mn 형광체를 혼합한 종래의 녹색 발광 형광체와 SrGa2S4:Eu 형광체를 혼합한 녹색 발광 형광체를 제조한 후 상기 표 1과 같은 조건으로 발광특성을 평가하여 그 결과를 아래의 표 2에 나타냈다.Based on the data of Table 1, a conventional green light emitting phosphor in which Zn 2 SiO 4 : Mn phosphor is mixed, and a green light emitting phosphor in which SrGa 2 S 4 : Eu phosphor is mixed are produced, and emits light under the conditions shown in Table 1 above. The properties were evaluated and the results are shown in Table 2 below.
상기 표 2에서, 휘도1)는 혼합 형광체 1의 휘도를 100%로 했을 때의 상대휘도를 나타내고, 혼합 형광체 1 및 2는 색순도, 휘도특성 및 열화특성 등 혼합 형광체의 발광특성이 가장 양호한 혼합비라고 통상적으로 알려져 있는 조성비로 혼합한 것임.In Table 2, the luminance 1) represents the relative luminance when the luminance of the mixed phosphor 1 is 100%, and the mixed phosphors 1 and 2 indicate that the light emission characteristics of the mixed phosphor, such as color purity, luminance and deterioration characteristics, are the best mixed ratios. It is a mixture with the composition ratio generally known.
표 2를 참조하면, SrGa2S4:Eu 형광체를 혼합한 녹색 발광 형광체는 Zn2SiO4:Mn 형광체를 혼합한 녹색 발광 형광체보다 휘도특성 및 열화특성이 향상된 것을 알 수 있다. 특히 혼합 형광체 2와 혼합 형광체 3을 비교하여 보면, 각각 같은 중량%의 SrGa2S4:Eu 형광체 및 Zn2SiO4:Mn 형광체를 혼합했을 때, SrGa2S4:Eu 형광체를 혼합한 형광체 3이 Zn2SiO4:Mn 형광체를 혼합한 형광체 2보다 휘도특성 및 열화특성이 우수한 것을 알 수 있다. 그러나 상기 혼합 형광체 3은 녹색 발광 형광체로서 사용가능한 색좌표를 갖고 있지만, 다른 혼합 형광체보다 색순도가 다소 떨어지므로 색순도를 향상시키기 위해서는 열화특성이 저하되지 않는 한도내에서 SrGa2S4:Eu 형광체의 함유량을 높이는 것이 필요하다.Referring to Table 2, it can be seen that the green light emitting phosphor mixed with the SrGa 2 S 4 : Eu phosphor has improved luminance and deterioration characteristics than the green light emitting phosphor mixed with the Zn 2 SiO 4 : Mn phosphor. In particular, when comparing the mixed phosphor 2 and the mixed phosphor 3, when the same weight% SrGa 2 S 4 : Eu phosphor and Zn 2 SiO 4 : Mn phosphor were mixed, the phosphor 3 mixed with the SrGa 2 S 4 : Eu phosphor It can be seen that the luminance characteristic and the deterioration characteristic are superior to the phosphor 2 in which the Zn 2 SiO 4 : Mn phosphor is mixed. However, although the mixed phosphor 3 has a color coordinate that can be used as a green light emitting phosphor, the color purity is slightly lower than that of other mixed phosphors, so that the content of the SrGa 2 S 4 : Eu phosphor may be increased within the limit of deterioration characteristics to improve the color purity. It is necessary to raise.
따라서, 본 발명은 Zn2SiO4:Mn 형광체를 포함하는 종래의 혼합 녹색 발광 형광체로부터 휘도특성 및 열화특성이 좋지 않은 Zn2SiO4:Mn 형광체를, 휘도특성 및 색순도가 매우 우수할 뿐만 아니라 열화특성이 양호한 SrGa2S4:Eu 형광체로 대체하고, Y3(Al,Ga)5O12:Tb 형광체, LaOCl:Tb 형광체 및 SrGa2S4:Eu 형광체를 바람직한 조성비로 혼합하여 우수한 발광특성을 갖는 혼합 녹색 발광 형광체를 제공하고자 한다.Accordingly, the present invention provides a Zn 2 SiO 4 : Mn phosphor, which has a low luminance and deterioration characteristics, from a conventional mixed green light-emitting phosphor including a Zn 2 SiO 4 : Mn phosphor, not only having excellent luminance and color purity but also deterioration. and replaced with Eu phosphor, Y 3 (Al, Ga) 5 O 12:: properties and good SrGa 2 S 4 the Eu excellent luminescence properties by mixing a fluorescent material in its preferred composition ratio: Tb phosphor, LaOCl: Tb phosphor and SrGa 2 S 4 It is intended to provide a mixed green light emitting phosphor having.
본 발명은 SrGa2S4:Eu 형광체 5 내지 20중량%, Y3(Al,Ga)5O12:Tb 형광체 60 내지 90중량% 및 LaOCl:Tb형광체 5 내지 20중량%를 포함하는 녹색 발광 형광체 조성물을 제공한다.The present invention provides a green light emitting phosphor comprising 5 to 20% by weight of SrGa 2 S 4 : Eu phosphor, 60 to 90% by weight of Y 3 (Al, Ga) 5 O 12 : Tb phosphor, and 5 to 20% by weight of LaOCl: Tb phosphor. To provide a composition.
본 발명에 따른 녹색 발광 형광체 조성물에 있어서, SrGa2S4:Eu 형광체의 함량은 5 내지 20중량%인 것이 바람직한데, 5중량% 미만이면 휘도특성 및 색순도가 저하되고, 20중량%를 초과하면 휘도특성 및 색순도가 향상되나 열화특성이 저하되는 문제가 있다. 더욱 바람직하게는 10 내지 15중량%이다.In the green light emitting phosphor composition according to the present invention, the content of the SrGa 2 S 4 : Eu phosphor is preferably 5 to 20% by weight. If it is less than 5% by weight, the luminance characteristics and color purity are lowered, and when the amount of the SrGa 2 S 4 : Eu phosphor is greater than 20% by weight. Although luminance and color purity are improved, there is a problem that degradation characteristics are degraded. More preferably, it is 10-15 weight%.
또한, 본 발명에 따른 녹색 발광 형광체 조성물에 있어서, Y3(Al,Ga)5O12:Tb 형광체의 함량은 60 내지 90중량%인 것이 바람직한데, 60중량% 미만이면 색순도는 향상되나 열화특성이 저하되는 문제점이 있고, 90중량%를 초과하면 열화특성은 향상되나 색순도가 저하되는 문제점이 있다. 더욱 바람직하게는 70 내지 85중량%이다.In addition, in the green light emitting phosphor composition according to the present invention, the content of the Y 3 (Al, Ga) 5 O 12 : Tb phosphor is preferably 60 to 90% by weight. There is a problem that this is lowered, and if it exceeds 90% by weight deterioration characteristics are improved, but there is a problem that the color purity is lowered. More preferably, it is 70 to 85 weight%.
또한, 본 발명에 따른 녹색 발광 형광체 조성물에 있어서, LaOCl:Tb 형광체의 함량은 5 내지 20중량%인 것이 바람직한데, 5중량% 미만이면 Y3(Al,Ga)5O12:Tb 형광체의 함량이 상대적으로 증가하므로 색순도가 저하되는 문제점이 있고, 20중량%를 초과하면 Y3(Al,Ga)5O12:Tb 형광체의 함량이 상대적으로 감소하므로 휘도특성 및 열화특성이 저하되는 문제점이 있다. 더욱 바람직하게는 5 내지 15중량%이다.In addition, in the green light emitting phosphor composition according to the present invention, the content of LaOCl: Tb phosphor is preferably 5 to 20% by weight, and if less than 5% by weight, the content of Y 3 (Al, Ga) 5 O 12 : Tb phosphor is used. Since the relative increase of the color purity is lowered, if the content of more than 20% by weight of Y 3 (Al, Ga) 5 O 12 : Tb phosphor is relatively reduced, there is a problem that the brightness characteristics and deterioration characteristics are deteriorated . More preferably, it is 5-15 weight%.
이하, 본 발명을 실시예를 통해 더욱 상세히 설명하고자 하는데, 본 발명의 범위가 하기 실시예로 한정되는 것이 아님은 물론이다.Hereinafter, the present invention will be described in more detail with reference to Examples, but the scope of the present invention is not limited to the following Examples.
<실시예 1><Example 1>
Y3(Al,Ga)5O12:Tb 형광체 75중량%, LaOCl:Tb 형광체 15중량% 및 SrGa2S4:Eu 형광체 10중량%를 건식혼합하였다. 상기 혼합물을 18% K2SiO3용액을 첨가한 물에 분산시킨 후 충분히 혼합하였다. 상기 혼합물의 분산액을 Ba(NO3)2용액이 첨가된 수조에 투입하고, 여기에 글래스 패널을 넣은 후 침강법에 의해서 상기 글래스 패널상에 상기 혼합물로 이루어진 형광막을 형성하였다. 상기 형광막의 두께는 단위면적당 중량으로 5mg/cm2이 되도록 혼합 형광체의 양을 조절하였다. 소성에 의하여 제거될 수 있는 래커필름을 상기 형광막상에 도포하고 이어서 얇은 알루미늄막을 진공증착하였다. 마지막으로 상기 스크린막을 소성하였다.75 wt% of Y 3 (Al, Ga) 5 O 12 : Tb phosphor, 15 wt% of LaOCl: Tb phosphor, and 10 wt% of SrGa 2 S 4 : Eu phosphor were dry mixed. The mixture was dispersed in water with an 18% K 2 SiO 3 solution added and mixed well. The dispersion of the mixture was introduced into a water bath to which a Ba (NO 3 ) 2 solution was added, and a glass panel was placed therein to form a fluorescent film made of the mixture on the glass panel by sedimentation. The thickness of the fluorescent film was adjusted to the amount of the mixed phosphor to be 5mg / cm 2 by weight per unit area. A lacquer film that can be removed by firing was applied onto the fluorescent film, and then a thin aluminum film was vacuum deposited. Finally, the screen film was fired.
이렇게 하여 제작한 스크린막에 대하여 음극선관과 같은 구조의 디마운터블 시스템(demountable system, BM-7)을 이용하여 상대휘도, 색좌표, 휘도유지율을 측정하여 그 결과를 하기 표 3에 나타냈다. 평가조건은 가속전압이 20kV, 구동전류 Ik가 60㎂, 래스터(raster)의 크기는 2.0cm × 2.0cm, 그리고 열화평가시간은 600초였다.The screen thus produced was measured using a demountable system (BM-7) having the same structure as a cathode ray tube, and the relative luminance, color coordinates, and luminance retention were measured, and the results are shown in Table 3 below. The evaluation conditions were acceleration voltage of 20 kV, drive current I k of 60 mA, raster size of 2.0 cm x 2.0 cm, and degradation evaluation time of 600 seconds.
<실시예 2><Example 2>
Y3(Al,Ga)5O12:Tb 형광체 70중량%, LaOCl:Tb 형광체 15중량% 및 SrGa2S4:Eu 형광체 15중량%를 사용한 것을 제외하고는 실시예 1과 동일한 방법으로 스크린막을 제조하였다. 이렇게 하여 제작한 스크린막에 대하여 상대휘도, 색좌표, 휘도유지율을 측정하여 표 3에 나타냈다.A screen film was manufactured in the same manner as in Example 1, except that 70 wt% of Y 3 (Al, Ga) 5 O 12 : Tb phosphor, 15 wt% of LaOCl: Tb phosphor, and 15 wt% of SrGa 2 S 4 : Eu phosphor were used. Prepared. The relative luminance, color coordinates, and luminance retention of the screen film thus produced were measured and shown in Table 3.
<실시예 3><Example 3>
Y3(Al,Ga)5O12:Tb 형광체 85중량%, LaOCl:Tb 형광체 5중량% 및 SrGa2S4:Eu 형광체 10중량%를 사용한 것을 제외하고는 실시예 1과 동일한 방법으로 스크린막을 제조하였다. 이렇게 하여 제작한 스크린막에 대하여 상대휘도, 색좌표, 휘도유지율을 측정하여 표 3에 나타냈다.A screen film was prepared in the same manner as in Example 1, except that 85 wt% of Y 3 (Al, Ga) 5 O 12 : Tb phosphor, 5 wt% of LaOCl: Tb phosphor, and 10 wt% of SrGa 2 S 4 : Eu phosphor were used. Prepared. The relative luminance, color coordinates, and luminance retention of the screen film thus produced were measured and shown in Table 3.
<비교예 1>Comparative Example 1
Y3(Al,Ga)5O12:Tb 형광체와 Zn2SiO4:Mn 형광체로 이루어진 종래의 녹색 발광 형광체 조성물에 있어서, Y3(Al,Ga)5O12:Tb 형광체 93중량%와 Zn2SiO4:Mn 형광체 7중량%로 이루어진 경우가 가장 좋은 발광특성을 나타내는 것으로 알려져 있다. 따라서, Y3(Al,Ga)5O12:Tb 형광체 93중량%와 Zn2SiO4:Mn 형광체 7중량%를 사용한 것을 제외하고는 실시예 1과 동일한 방법으로 스크린막을 제조하여 이것을 비교예로 사용하였다. 이렇게 하여 제작한 스크린막에 대하여 상대휘도, 색좌표, 휘도유지율을 측정하여 표 3에 나타냈다.In a conventional green light emitting phosphor composition comprising a Y 3 (Al, Ga) 5 O 12 : Tb phosphor and a Zn 2 SiO 4 : Mn phosphor, 93 wt% of the Y 3 (Al, Ga) 5 O 12 : Tb phosphor and Zn 2 SiO 4 : Mn phosphor 7% by weight is known to exhibit the best light emission characteristics. Thus, except that 93 wt% of Y 3 (Al, Ga) 5 O 12 : Tb phosphor and 7 wt% of Zn 2 SiO 4 : Mn phosphor were used, a screen film was prepared in the same manner as in Example 1 to obtain a screen film. Used. The relative luminance, color coordinates, and luminance retention of the screen film thus produced were measured and shown in Table 3.
<비교예 2>Comparative Example 2
Y3(Al,Ga)5O12:Tb 형광체, LaOCl:Tb 형광체 및 Zn2SiO4:Mn 형광체로 이루어진종래의 녹색 발광 형광체 조성물에 있어서, Y3(Al,Ga)5O12:Tb 형광체 70중량%, LaOCl:Tb 형광체 25중량% 및 Zn2SiO4:Mn 형광체 5중량%로 이루어진 경우가 가장 좋은 발광특성을 나타내는 것으로 알려져 있다. 따라서, Y3(Al,Ga)5O12:Tb 형광체 70중량%, LaOCl:Tb 형광체 25중량% 및 Zn2SiO4:Mn 형광체 5중량%를 사용한 것을 제외하고는 실시예 1과 동일한 방법으로 스크린막을 제조하였다. 이렇게 하여 제작한 스크린막에 대하여 상대휘도, 색좌표, 휘도유지율을 측정하여 표 3에 나타냈다.In a conventional green light emitting phosphor composition composed of Y 3 (Al, Ga) 5 O 12 : Tb phosphor, LaOCl: Tb phosphor, and Zn 2 SiO 4 : Mn phosphor, the Y 3 (Al, Ga) 5 O 12 : Tb phosphor 70 wt%, 25 wt% of LaOCl: Tb phosphor and 5 wt% of Zn 2 SiO 4 : Mn phosphor are known to exhibit the best luminescence properties. Thus, the same method as in Example 1 was used except that 70 wt% of Y 3 (Al, Ga) 5 O 12 : Tb phosphor, 25 wt% of LaOCl: Tb phosphor, and 5 wt% of Zn 2 SiO 4 : Mn phosphor were used. Screen membranes were prepared. The relative luminance, color coordinates, and luminance retention of the screen film thus produced were measured and shown in Table 3.
<비교예 3 ~ 비교예5><Comparative Example 3 to Comparative Example 5>
Y3(Al,Ga)5O12:Tb 형광체, LaOCl:Tb 형광체 및 SrGa2S4:Eu 형광체 함량을 표 3과 같이 변화시킨 것을 제외하고는 실시예 1과 동일한 방법으로 스크린막을 제조하였다. 이렇게 하여 제작한 스크린막에 대하여 상대휘도, 색좌표, 휘도유지율을 측정하여 표 3에 나타냈다.A screen film was manufactured in the same manner as in Example 1, except that Y 3 (Al, Ga) 5 O 12 : Tb phosphor, LaOCl: Tb phosphor, and SrGa 2 S 4 : Eu phosphor content were changed as shown in Table 3. The relative luminance, color coordinates, and luminance retention of the screen film thus produced were measured and shown in Table 3.
상기 표 3에서, 휘도1)는 비교예 1의 휘도를 100%로 했을 때의 상대휘도를 나타냄.In Table 3, luminance 1) represents relative luminance when the luminance of Comparative Example 1 is 100%.
표 3을 참조하면, 실시예 1 내지 실시예 3의 혼합 형광체는 휘도유지율이 90% 이상으로 양호하며, 비교예 1 및 비교예 2의 종래 형광체에 비하여 휘도 및 색순도가 향상되었음을 알 수 있다. 만약 비교예 1 또는 비교예 2의 혼합 형광체의 색좌표를 실시예와 같은 색순도를 갖도록 Zn2SiO4:Mn 형광체의 함량을 증가시키면, 비교예의 휘도특성 및 열화특성은 본 발명에 따른 실시예의 혼합 형광체에 비해 더욱 불량하게 된다.Referring to Table 3, it can be seen that the mixed phosphors of Examples 1 to 3 have good luminance retention of 90% or more, and have improved luminance and color purity as compared with the conventional phosphors of Comparative Examples 1 and 2. If the color coordinates of the mixed phosphors of Comparative Example 1 or Comparative Example 2 are increased in the content of Zn 2 SiO 4 : Mn phosphors to have the same color purity as in Example, the luminance characteristics and deterioration characteristics of the Comparative Example are mixed phosphors of Examples according to the present invention. It is worse than.
SrGa2S4:Eu 형광체의 혼합량이 증가할수록(실시예 2, 비교예 3 및 비교예 5) 휘도유지율은 저하되므로 SrGa2S4:Eu 형광체의 혼합량이 20중량%를 초과하는 것은 휘도유지율면에서 바람직하지 않다. 또한, 실시예 3, 실시예 1 및 비교예 4를 비교해 보면, Y3(Al,Ga)5O12:Tb 형광체의 혼합량이 감소할수록 휘도가 저하되므로 LaOCl:Tb형광체의 혼합량이 20중량%를 초과하는 것은 휘도특성면에서 바람직하지 않음을 알 수 있다.As the mixing amount of the SrGa 2 S 4 : Eu phosphor increases (Example 2, Comparative Example 3 and Comparative Example 5), the luminance maintaining rate decreases, so that the mixing amount of the SrGa 2 S 4 : Eu phosphor exceeds 20% by weight in terms of luminance maintaining rate. Not desirable in In addition, when Example 3, Example 1, and Comparative Example 4 were compared, the luminance decreased as the mixing amount of the Y 3 (Al, Ga) 5 O 12 : Tb phosphor decreased, so that the mixing amount of the LaOCl: Tb phosphor was 20% by weight. It can be seen that the excess is not preferable in terms of luminance characteristics.
한편, SrGa2S4:Eu 형광체의 잔광특성이 Zn2SiO4:Mn 형광체보다 매우 우수하므로 SrGa2S4:Eu 형광체를 혼합한 형광체(실시예 1 내지 실시예 3)는 Zn2SiO4:Mn 형광체를 혼합한 종래의 형광체(비교예 1 및 비교예 2)에 비하여 잔광시간이 짧다.On the other hand, since the afterglow characteristics of the SrGa 2 S 4 : Eu phosphor are much better than those of the Zn 2 SiO 4 : Mn phosphor, the phosphors (Examples 1 to 3) in which the SrGa 2 S 4 : Eu phosphor is mixed are Zn 2 SiO 4 : The afterglow time is shorter than that of conventional phosphors (Comparative Example 1 and Comparative Example 2) in which Mn phosphors are mixed.
상기한 바와 같이, SrGa2S4:Eu 형광체는 종래의 Zn2SiO4:Mn 형광체에 비하여고전류구동하에서의 휘도특성, 색순도 및 열화(수명)특성이 우수하므로, 이를 적절한 비율로 혼합한 녹색 발광 형광체는 양호한 발광특성을 갖는다. 즉, 본 발명에 따른 조성비를 갖는, Y3(Al,Ga)5O12:Tb 형광체, LaOCl:Tb 형광체 및 SrGa2S4:Eu 형광체의 혼합 녹색 발광 형광체는 양호한 열화특성을 가질 뿐만 아니라 Zn2SiO4:Mn 형광체를 혼합한 종래의 녹색 발광 형광체에 비하여 휘도특성 및 색순도가 우수하다.As described above, the SrGa 2 S 4 : Eu phosphor has better luminance, color purity, and deterioration (life) characteristics under high current driving than the conventional Zn 2 SiO 4 : Mn phosphor, and thus, a green light emitting phosphor mixed with an appropriate ratio Has good light emission characteristics. That is, a mixed green light emitting phosphor having a composition ratio according to the present invention, Y 3 (Al, Ga) 5 O 12 : Tb phosphor, LaOCl: Tb phosphor, and SrGa 2 S 4 : Eu phosphor not only has good deterioration characteristics, but also Zn Compared with the conventional green light-emitting phosphor in which 2 SiO 4 : Mn phosphor is mixed, the luminance characteristic and the color purity are excellent.
Claims (3)
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019990025807A KR100294506B1 (en) | 1999-06-30 | 1999-06-30 | Green emitting phosphor compositions and projection type cathod-ray tube having phosphor layer manufactured using the same |
| US09/549,163 US6465946B1 (en) | 1999-04-14 | 2000-04-13 | Green-emitting phosphor composition and cathode ray tube manufactured using the same |
| CN00108894.7A CN1133144C (en) | 1999-04-14 | 2000-04-14 | Green fluorescent powder composition and cathode ray tube manufactured therefrom |
| JP2000114318A JP2000319650A (en) | 1999-04-14 | 2000-04-14 | Green-emitting phosphor composition and cathode ray tube provided with fluorescent film produced therefrom |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019990025807A KR100294506B1 (en) | 1999-06-30 | 1999-06-30 | Green emitting phosphor compositions and projection type cathod-ray tube having phosphor layer manufactured using the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR20010005022A KR20010005022A (en) | 2001-01-15 |
| KR100294506B1 true KR100294506B1 (en) | 2001-07-03 |
Family
ID=19597756
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1019990025807A KR100294506B1 (en) | 1999-04-14 | 1999-06-30 | Green emitting phosphor compositions and projection type cathod-ray tube having phosphor layer manufactured using the same |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR100294506B1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4235748B2 (en) * | 2002-03-18 | 2009-03-11 | 株式会社日立プラズマパテントライセンシング | Display device |
-
1999
- 1999-06-30 KR KR1019990025807A patent/KR100294506B1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| KR20010005022A (en) | 2001-01-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR100342044B1 (en) | Green Emitting Phosphor Composition and Cathod-Ray Tube manufactured using the same | |
| US5600202A (en) | Green-emitting phosphor and cathode-ray tube employing it | |
| US6465946B1 (en) | Green-emitting phosphor composition and cathode ray tube manufactured using the same | |
| US5312560A (en) | Rare earth phosphor | |
| KR100294506B1 (en) | Green emitting phosphor compositions and projection type cathod-ray tube having phosphor layer manufactured using the same | |
| KR100329559B1 (en) | Green Emitting Phosphor, Green Emitting Phosphor Composition containing the same and Cathod-Ray Tube manufactured using the same | |
| JP2002231151A (en) | Image display device | |
| KR100325859B1 (en) | Green emitting phosphor coated with metallic salts and method for manufacturing the same | |
| US6517740B2 (en) | Phosphor and method for preparing same | |
| KR20010103176A (en) | Yttrium silicate phosphor using a surface coating and Manufacturing method thereof | |
| US5520847A (en) | Low-velocity electron excited phosphor | |
| KR100658707B1 (en) | A red emitting phosphor for low-voltage applications and a method of preparing the same | |
| US5185553A (en) | Green emitting phosphor and cathode ray tube using said phosphor | |
| JP3631299B2 (en) | Green light emitting phosphor and cathode ray tube using the same | |
| JPS6119688A (en) | Blue-emitting phosphor and blue-emitting cathode ray tube containing the same for use in color projection type picture tube | |
| KR20010019297A (en) | Green emitting phosphor compositions and cathod-ray tube having phosphor layer manufactured using the same | |
| KR100268715B1 (en) | A blue mixed phosphor | |
| KR100315115B1 (en) | Manufacturing method of green emitting phosphor | |
| JPH0570775A (en) | Red emitting phosphor | |
| KR100965544B1 (en) | Phosphor for flat panel display device | |
| JP3729912B2 (en) | Red light emitting phosphor and cathode ray tube | |
| KR910002681B1 (en) | Green-radiation fluorescent substance | |
| JPS6218589B2 (en) | ||
| JPS60170686A (en) | Blue emitting braun tube for color display unit of projection type | |
| JPH0252382B2 (en) |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A201 | Request for examination | ||
| E701 | Decision to grant or registration of patent right | ||
| GRNT | Written decision to grant | ||
| FPAY | Annual fee payment |
Payment date: 20070327 Year of fee payment: 7 |
|
| LAPS | Lapse due to unpaid annual fee |