KR940007645B1 - Fluorescent layer manufacturing method of crt - Google Patents
Fluorescent layer manufacturing method of crt Download PDFInfo
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- KR940007645B1 KR940007645B1 KR1019920002442A KR920002442A KR940007645B1 KR 940007645 B1 KR940007645 B1 KR 940007645B1 KR 1019920002442 A KR1019920002442 A KR 1019920002442A KR 920002442 A KR920002442 A KR 920002442A KR 940007645 B1 KR940007645 B1 KR 940007645B1
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- phosphor
- red light
- indium
- fluorescent film
- europium
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- 238000004519 manufacturing process Methods 0.000 title claims description 11
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 44
- 239000000049 pigment Substances 0.000 claims description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 12
- 229910052693 Europium Inorganic materials 0.000 claims description 9
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 claims description 8
- 239000006185 dispersion Substances 0.000 claims description 8
- -1 europium-activated yttrium sulfate phosphor Chemical class 0.000 claims description 8
- 239000007789 gas Substances 0.000 claims description 8
- 239000007864 aqueous solution Substances 0.000 claims description 5
- 239000002002 slurry Substances 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 3
- 238000010304 firing Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
- 150000002471 indium Chemical class 0.000 claims description 2
- 238000002156 mixing Methods 0.000 claims description 2
- 229910052738 indium Inorganic materials 0.000 claims 2
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 claims 2
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 claims 1
- GKCNVZWZCYIBPR-UHFFFAOYSA-N sulfanylideneindium Chemical compound [In]=S GKCNVZWZCYIBPR-UHFFFAOYSA-N 0.000 description 11
- 239000000243 solution Substances 0.000 description 9
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 239000001034 iron oxide pigment Substances 0.000 description 5
- 238000007796 conventional method Methods 0.000 description 4
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 4
- 108010010803 Gelatin Proteins 0.000 description 3
- 229920000159 gelatin Polymers 0.000 description 3
- 239000008273 gelatin Substances 0.000 description 3
- 235000019322 gelatine Nutrition 0.000 description 3
- 235000011852 gelatine desserts Nutrition 0.000 description 3
- 229910000337 indium(III) sulfate Inorganic materials 0.000 description 3
- XGCKLPDYTQRDTR-UHFFFAOYSA-H indium(iii) sulfate Chemical compound [In+3].[In+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O XGCKLPDYTQRDTR-UHFFFAOYSA-H 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 229920000084 Gum arabic Polymers 0.000 description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 241000978776 Senegalia senegal Species 0.000 description 2
- 235000010489 acacia gum Nutrition 0.000 description 2
- 239000000205 acacia gum Substances 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 238000000498 ball milling Methods 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- SIXIBASSFIFHDK-UHFFFAOYSA-N indium(3+);trisulfide Chemical compound [S-2].[S-2].[S-2].[In+3].[In+3] SIXIBASSFIFHDK-UHFFFAOYSA-N 0.000 description 2
- IGUXCTSQIGAGSV-UHFFFAOYSA-K indium(iii) hydroxide Chemical compound [OH-].[OH-].[OH-].[In+3] IGUXCTSQIGAGSV-UHFFFAOYSA-K 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- JOSWYUNQBRPBDN-UHFFFAOYSA-P ammonium dichromate Chemical compound [NH4+].[NH4+].[O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O JOSWYUNQBRPBDN-UHFFFAOYSA-P 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- LBJNMUFDOHXDFG-UHFFFAOYSA-N copper;hydrate Chemical compound O.[Cu].[Cu] LBJNMUFDOHXDFG-UHFFFAOYSA-N 0.000 description 1
- PGWFQHBXMJMAPN-UHFFFAOYSA-N ctk4b5078 Chemical compound [Cd].OS(=O)(=O)[Se]S(O)(=O)=O PGWFQHBXMJMAPN-UHFFFAOYSA-N 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- PSCMQHVBLHHWTO-UHFFFAOYSA-K indium(iii) chloride Chemical compound Cl[In](Cl)Cl PSCMQHVBLHHWTO-UHFFFAOYSA-K 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 239000001054 red pigment Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000007873 sieving Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000006228 supernatant Substances 0.000 description 1
Classifications
-
- 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
- H01J9/20—Manufacture of screens on or from which an image or pattern is formed, picked up, converted or stored; Applying coatings to the vessel
- H01J9/22—Applying luminescent coatings
- H01J9/227—Applying luminescent coatings with luminescent material discontinuously arranged, e.g. in dots or lines
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Luminescent Compositions (AREA)
Abstract
내용 없음.No content.
Description
제 1 도는 산화철 안료를 부착한 적색 발광 형광체를 채용하여 통상의 방법에 따라 제조한 형광막의 200배 확대 사진.1 is a 200 times magnified photograph of a fluorescent film prepared according to a conventional method employing a red light-emitting phosphor having an iron oxide pigment.
제 2 도는 황화인듐 안료를 부착한 적색 발광 형광체를 통상의 방법에 따라 형광막에 채용하여 얻어진 형광막의 200배 확대 사진.2 is an enlarged 200 times photograph of a fluorescent film obtained by employing a red light-emitting phosphor having an indium sulfide pigment applied to the fluorescent film according to a conventional method.
제 3 도는 황화인듐 안료를 부착한 적색 발광 형광체를 본 발명의 실시예 1에 따라 형광막에 채용하여 얻어진 형광막의 200배 확대 사진.3 is a 200 times magnified photograph of a fluorescent film obtained by employing a red light-emitting phosphor having an indium sulfide pigment attached to the fluorescent film according to Example 1 of the present invention.
제 4 도는 황화인듐 안료를 부착한 적색 발광 형광체를 본 발명의 실시예 2에 따라 형광막에 채용하여 얻어진 형광막의 200배 확대 사진.4 is a 200 times magnified photograph of a fluorescent film obtained by employing a red light-emitting phosphor having an indium sulfide pigment attached to the fluorescent film according to Example 2 of the present invention.
본 발명은 음극선관용 형광막의 제조방법에 관한 것으로서, 특히 휘도와 콘트라스트가 향상되고 치밀한 막구조를 갖는 음극선관용 형광막의 제조방법에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a fluorescent film for cathode ray tubes, and more particularly, to a method for manufacturing a cathode ray tube fluorescent film having improved density and contrast and a dense film structure.
칼라 음극선관에 사용되고 있는 적색, 녹색, 청색의 형광체 입자 표면에는 형광체가 발하는 빛중 일부 바람직하지 못한 영역의 광을 흡수시킴으로 형광체의 콘트라스트를 향상시키기 위해 안료 입자를 부착시키고 있다.Pigment particles are attached to the surface of the red, green, and blue phosphor particles used in the color cathode ray tube to improve the contrast of the phosphor by absorbing light in some undesired regions of the phosphor.
이들중 Y2O2S : Eu, YVO4: Eu, Y2O3: Eu등의 적색 발광 형광체에 도입되는 안료로는 산화철(Fe2O3), 카드뮴 설포셀레나이드[Cd(S1-x, Sex), 0〈x〈1] 및 산화구리(Cu2O) 등이 있다.Among these pigments, pigments introduced into red light-emitting phosphors such as Y 2 O 2 S: Eu, YVO 4 : Eu, Y 2 O 3 : Eu, and the like are iron oxide (Fe 2 O 3 ) and cadmium sulfoselenide [Cd (S 1 −). x, Sex), 0 <x <1] and copper oxide (Cu 2 O).
특히, 산화철 안료가 내산성, 내열성, 내알칼리성등의 특성을 가지고 있어 널리 사용되고 있으나, 이를 형광체의 표면에 부착시 콜트라스트는 향상시키지만 휘도는 감소시킨다는 문제점을 가지고 있다. 따라서 선명한 색상을 가지고 있으면서도 독성이 없는 안료의 개발이 요구되고 있는 것이다.In particular, iron oxide pigments are widely used because they have properties such as acid resistance, heat resistance, alkali resistance, etc., but when they are attached to the surface of the phosphor, they have a problem of improving coltrast but decreasing luminance. Therefore, it is required to develop a pigment having a vivid color and non-toxic.
본 발명자는 상기한 문제점을 감안하여 대한민국 특허출원 제91-23723호(1991년 12월 20일 출원)에 황화인듐을 안료로서 채용한 안료부착 적색 발광 형광체 및 이의 제조방법을 개시하였다. 상기 안료부착 형광체는 휘도와 콘트라스트가 향상되고 색순도가 높은 형광체로서 그 제조가 용이하다는 장점을 갖고 있다.In view of the above problems, the present inventor has disclosed a pigment-attached red light-emitting phosphor employing indium sulfide as a pigment in Korean Patent Application No. 91-23723 (filed December 20, 1991) and a method of manufacturing the same. The pigment-containing phosphor has an advantage that the luminance and contrast are improved and its manufacture is easy as a phosphor having high color purity.
본 발명의 목적은 상기한 황화인듐 안료 부착 적색 발광 형광체를 사용하여 우수한 막특성을 갖는 음극선관용 형광막을 제조하는 방법을 제공하는 것이다.An object of the present invention is to provide a method for producing a fluorescent film for cathode ray tube having excellent film properties by using the red light emitting phosphor with indium sulfide pigment described above.
상기 목적을 달성하기 위하여 본 발명에서는 적색 발광 형광체의 분산액에 인듐염과 염기성 수용액을 가하여 형광체의 표면에 수산화인듐[In(OH)3]을 석출시키고 이를 내열성 도가니에 넣어 황화수소(H2S) 가스 분위기하에서 700 내지 950℃ 온도 범위로 2 내지 8시간 동안 소성하여 황화인듐 안료가 부착된 적색 발광 형광체를 제조하는 단계와 ; 상기 소성물을 순수, 볼 밀과 함께 볼 밀 처리하여 건조하는 단계와 ; 상기 건조물을 사용하여 형광체 슬러리를 제조하고 이를 패널 내면에 도포하여 노광 및 현상함으로 적색 형광체 패턴을 형성하는 단계 ; 를 포함하는 음극선관용 형광막의 제조방법을 제공한다.In order to achieve the above object, in the present invention, an indium salt and a basic aqueous solution are added to a dispersion of a red light-emitting phosphor to precipitate indium hydroxide [In (OH) 3 ] on the surface of the phosphor and placed in a heat-resistant crucible to form hydrogen sulfide (H 2 S) gas. Calcining for 2 to 8 hours in an atmosphere of 700 to 950 ° C. under an atmosphere to prepare a red light-emitting phosphor having an indium sulfide pigment attached thereto; Ball milling and drying the calcined product together with pure water and a ball mill; Preparing a phosphor slurry using the dried material and applying the same to the inner surface of the panel to form a red phosphor pattern by exposure and development; It provides a method for producing a fluorescent film for cathode ray tube comprising a.
상기 적색 발광 형광체로는 유로피움 부활 산황화 이트륨 형광체(Y2O2S : Eu), 유로피움 부활 산화이트륨 형광체(Y2O3: Eu), 유로피움 부활 바나딘산 이트륨 형광체(YVO4: Eu)등 어느 적색 발광 형광체이든 사용할 수 있다.Examples of the red light-emitting phosphor include europium-activated yttrium sulfide phosphor (Y 2 O 2 S: Eu), europium-activated yttrium oxide phosphor (Y 2 O 3 : Eu), europium-activated yttrium phosphate vanadium phosphate phosphor (YVO 4 : Any red light emitting phosphor such as Eu) can be used.
또한 상기 소성시 황화수소 가스 분위기는 2ℓ/min의 속도로 황화수소 가스를 주입하여 형성하며 상기볼 밀 처리는 30 내지 50rpm의 속도로 수행하는 것이 바람직하다.In addition, the hydrogen sulfide gas atmosphere during firing is formed by injecting hydrogen sulfide gas at a rate of 2 L / min, and the ball mill treatment is preferably performed at a speed of 30 to 50 rpm.
본 발명의 음극선관용 형광막의 제조방법을 상세히 알아보면 다음과 같다.Looking at the manufacturing method of the fluorescent film for cathode ray tube of the present invention in detail as follows.
먼저 순수에 적색 발광 형광체를 넣고 충분히 교반시켜 형광체 분산액을 얻는다. 염화인듐(InCl3) 또는 황산인듐[In2(SO4)3]을 순수에 용해시킨 용액을 상기 형광체 분산액에 넣고 교반시킨다. 상기 혼합액을 교반하는중 묽은 염기성 수용액을 투입하여 용액의 pH를 4 내지 7로 조절한다. 염기를 가하면 형광체의 표면에는 수산화인듐[In(OH)3]이 석출되는데 이것을 필터로 여과, 건조시킨다. 건조물을 400메쉬 시이브로 체질한 후 내열성 알루미나 도가니에 넣는다. 도가니를 전기로 심체에 설치하고 양단을 밀폐시키면서 황화수소 가스 분위기하, 700 내지 950℃의 온도 범위에서 2 내지 8시간 동안 소성한다. 이러한 공정을 거친 소성물은 형광체 표면에 황화인듐(In2S3)이 부착된 것으로 붉은 체색을 얻는다. 이 형광체는 고온하에서 열처리 되었기 때문에 응집되어 있어 체질 후 바로 형광막에 채용하기에는 곤란하다. 이를 순수, 글래스 볼과 함께 혼합하여 약 30 내지 50rpm의 속도로 수시간 동안 볼 밀 처리하여 응집이 없는 황화인듐 안료부착 적색 발광 형광체를 얻는다. 제조된 안료부착 형광체를 이후 통상의 공정에 따라 순수, 폴리비닐알콜, 중크롬산 암모늄 등과 함께 혼합하여 형광체 슬러리를 제조하고 이를 패널의 내면에 도포한 후 건조, 노광, 현상 등의 공정을 수행하여 적색 형광체 패턴을 형성하고 필요에 따라 계속하여 녹색, 청색, 형광체 패턴을 형성하여 본 발명의 방법에 따른 음극선관용 형광막을 얻는다.First, a red luminescent phosphor is added to pure water and stirred sufficiently to obtain a phosphor dispersion. A solution obtained by dissolving indium chloride (InCl 3 ) or indium sulfate [In 2 (SO 4 ) 3 ] in pure water is added to the phosphor dispersion and stirred. While stirring the mixed solution, a diluted basic aqueous solution is added to adjust the pH of the solution to 4-7. When a base is added, indium hydroxide [In (OH) 3 ] precipitates on the surface of the phosphor, which is filtered and dried by a filter. The dried product is sieved with a 400 mesh sieve and placed in a heat-resistant alumina crucible. The crucible is electrically installed in the core and fired for 2 to 8 hours in a hydrogen sulfide gas atmosphere at a temperature in the range of 700 to 950 ° C. while sealing both ends. The calcined product having such a process is obtained by attaching indium sulfide (In 2 S 3 ) to the surface of the phosphor to obtain a red body color. This phosphor is agglomerated because it has been heat treated at a high temperature, and thus it is difficult to be used in a fluorescent film immediately after sieving. It is mixed with pure water and glass balls and ball milled for several hours at a speed of about 30 to 50 rpm to obtain a red light-emitting phosphor with indium sulfide pigment without aggregation. The phosphor-attached phosphors were then mixed with pure water, polyvinyl alcohol, ammonium dichromate, etc. according to a conventional process to prepare a phosphor slurry, and applied to the inner surface of the panel, followed by drying, exposure, development, and the like. A pattern is formed and subsequently green, blue, and phosphor patterns are formed as necessary to obtain a fluorescent film for cathode ray tube according to the method of the present invention.
이하 본 발명의 바람직한 실시예를 구체적으로 설명하기로 한다.Hereinafter, a preferred embodiment of the present invention will be described in detail.
[실시예 1]Example 1
심체 형광체인 유로피움 부활 산황화이트륨 형광체(Y2O2S : Eu) 100g을 순수 600g에 분산시킨다. 황산인듐[In2(SO4)3ㆍ9H2O] 1.0435g(이후 얻어지는 황화인듐(In2S3) 0.5g에 해당되는 양이다)을 순수 50ml에 녹여 교반중인 상기 형광체 분산액에 가한다. 수산화나트륨(NaOH)을 순수에 희석한 후 상기 용액에 한방울씩 적하하여 용액의 pH를 7로 맞춘다. 용액을 여과하여 여과물을 건조한 후 이를 400메쉬 시이브로 체질하고 내열성 알루미나 도가니에 충전한다. 99.99% 황화수소 가스를 2ℓ/min의 속도로 주입하면서, 950℃에서 3시간 동안 소성한다. 소성물을 400메쉬 시이브로 체질하여 황화인듐이 부착된 유로피움 부활 산황화이트륨 형광체를 얻는다. 이 안료부착 형광체 100g을 글래스 볼 150g 및 순수 60g과 혼합하여 약 30 내지 50rpm의 낮은 속도로 1시간 동안 밀링한다. 볼 분리후 안료부착 형광체를 건조시키고 이를 사용하여 통상의 방법에 따라 형광체 슬러리를 제조하여 패널의 내면에 도입함으로 본 발명의 방법에 따른 음극선관용 형광막을 제조한다.Europium-activated yttrium oxide phosphor (Y 2 O 2 S: Eu), which is a core phosphor, is dispersed in 600 g of pure water. 1.0435 g of indium sulfate [In 2 (SO 4 ) 3 .9H 2 O] (which is equivalent to 0.5 g of indium sulfide (In 2 S 3 ) obtained thereafter) is dissolved in 50 ml of pure water and added to the phosphor dispersion under stirring. Dilute sodium hydroxide (NaOH) in pure water, and dropwise dropwise to the solution to adjust the pH of the solution to 7. The solution is filtered, the filtrate is dried and sieved with a 400 mesh sieve and charged into a heat resistant alumina crucible. It is calcined at 950 ° C. for 3 hours while injecting 99.99% hydrogen sulfide gas at a rate of 2 l / min. The fired material is sieved with a 400 mesh sieve to obtain europium-activated yttrium sulphate phosphor with indium sulfide. 100 g of the pigmented phosphor is mixed with 150 g of glass balls and 60 g of pure water and milled for 1 hour at a low speed of about 30 to 50 rpm. After the separation of the ball, the fluorescent substance with pigment is dried and the fluorescent slurry for the cathode ray tube according to the method of the present invention is prepared by preparing the phosphor slurry according to a conventional method and introducing the same into the inner surface of the panel.
[실시예 2]Example 2
실시예 1과 동일한 방법으로 수행하되 수화된 황산인듐[In2(SO4)3ㆍ9H2O]의 양을 6.2613g(황화인듐 3g에 해당된다)으로 하여 본 발명의 방법에 따른 음극선관용 형광막을 얻는다.Performed in the same manner as in Example 1, but the amount of hydrated indium sulfate [In 2 (SO 4 ) 3 · 9H 2 O] to 6.2613g (corresponds to 3g indium sulfide) fluorescence for cathode ray tube according to the method of the present invention Get the act.
[비교예][Comparative Example]
젤라틴 1.8g을 순수 600ml에 분산시키고 40℃로 가열하여 젤라틴 수용액을 제조한다. Y2O2S : Eu 형광제 300g을 젤라틴 수용액에 가하고 교반기로 균일해질때까지 교반한다.1.8 g of gelatin is dispersed in 600 ml of pure water and heated to 40 ° C. to prepare a gelatin aqueous solution. 300 g of Y 2 O 2 S: Eu fluorescent was added to the aqueous gelatin solution and stirred until uniform with a stirrer.
아라비아 고무 1.2g을 순수 400ml에 분산시키고 40℃로 가열하여 아라비아 고무 수용액을 제조한다. 적색 안료 Fe2O30.48g(0.16중량%)을 아라비아 고무 수용액에 가하고 충분히 교반하여 안료 분산액을 얻는다.1.2 g of gum arabic is dispersed in 400 ml of pure water and heated to 40 ° C. to prepare an aqueous gum arabic solution. 0.48 g (0.16% by weight) of the red pigment Fe 2 O 3 is added to an aqueous arabic rubber solution and sufficiently stirred to obtain a pigment dispersion.
얻어진 안료 분산액과 형광체 분산액을 혼합한 후 교반하면서 pH를 6으로 맞춰진다. 용액을 방치하여 침전물이 가라 앉으면 상등액은 따라 버리고 침전물은 물로 여러번 씻어 준다. 고체 덩어리를 100℃에서 함량이 될때까지 건조하여 산화철 안료가 부착된 형광체를 얻는다. 이렇게 얻어진 안료부착 형광체를 패널의 내면에 채용하여 음극선관용 형광막을 제조한다.After mixing the obtained pigment dispersion and phosphor dispersion, pH is adjusted to 6 with stirring. When the solution is left to settle down, the supernatant is poured out and the precipitate is washed several times with water. The solid mass is dried at a content of 100 ° C. to obtain a phosphor with iron oxide pigment attached. The pigmented fluorescent substance thus obtained is employed on the inner surface of the panel to produce a fluorescent film for cathode ray tube.
이상의 각 실시예에서 제조한 형광막의 휘도, 콘트라스트 및 색좌표를 표 1에 나타내었다.Table 1 shows the luminance, contrast and color coordinates of the fluorescent films prepared in the above Examples.
[표 1]TABLE 1
* 상기 각 측정값들은 디마운터블 시스템(Demountable System)을 사용하여 측정한 값이다.* Each of the measured values is a value measured using a demountable system.
표 1로부터 본 발명의 방법에 따라 제조한 형광막이 더욱 향상된 휘도 및 콘트라스트 효과를 갖는다는 것을 알 수 있다. 이는 안료로 부착된 황화인듐이 전도성을 띄고 있으므로 형광막의 챠아지 업(charge up)을 방지해 줌으로써 형광막의 휘도저하를 방지하는 효과를 주며 부착된 황화인듐 안료가 적체색을 띄고 있기때문에 색순도와 콘트라스트를 향상시키기 때문인 것으로 생각된다.It can be seen from Table 1 that the fluorescent film prepared according to the method of the present invention has further improved brightness and contrast effects. This is because the indium sulfide attached to the pigment is conductive, thereby preventing the charge up of the fluorescent film, thereby preventing the decrease of the brightness of the fluorescent film. It is thought to be because it improves.
제 1 도는 비교 실시예에 따라 산화철 안료를 부착한 적색 발광 형광체를 채용하여 통상의 방법에 따라 제조한 형광막의 200배 확대 사진이고, 제 2 도는 황화인듐 안료를 부착한 적색 발광 형광체를, 통상의 방법에 따라 안료의 제조 후 볼 밀 처리하지 않은 상태에서 형광막에 채용하여 얻어진 형광막의 200배 확대 사진이다.1 is a 200 times magnified photograph of a fluorescent film prepared according to a conventional method employing a red light emitting phosphor with an iron oxide pigment according to a comparative example, and FIG. 2 is a red light emitting phosphor with an indium sulfide pigment. It is a 200 times magnification photograph of the fluorescent film obtained by employ | adopting for a fluorescent film in the state which does not ball-mill process after manufacture of a pigment by the method.
상기 각 사진은 마이크로스코피로 확대한 사진이며 검은 부분은 블랙 매트릭스 스트라이프이다.Each of the above pictures is a microscopic enlarged picture, and the black part is a black matrix stripe.
각 도면으로부터 본 발명의 실시예에 따라 얻어진 형광막은 종래의 산화철 안료를 부착하여 제조된 형광막에 비해 막의 구조가 더욱 치밀함을 알 수 있고, 제 2 도의 볼 밀 처리를 거치지 않은 안료부착 형광체를 채용하여 제조된 형광막은 구멍뚫림이 심하다는 것을 알 수 있다.From the drawings, it can be seen that the fluorescent film obtained according to the embodiment of the present invention has a more dense structure than the fluorescent film prepared by attaching a conventional iron oxide pigment. It can be seen that the fluorescent film produced by employing the hole was severe.
이상과 같이 본 발명의 방법에 따라 제조된 음극선관용 형광막은 치밀한 형광체 패턴의 막구조를 갖기 때문에 더욱 우수한 품질의 음극선판을 제공해줄 수 있게 된다.As described above, the cathode film for the cathode ray tube manufactured according to the method of the present invention has a compact phosphor pattern film structure, thereby providing a cathode ray plate of higher quality.
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