KR970012925A - Method for manufacturing electrophotographic screen of cathode ray tube and cathode ray tube - Google Patents

Method for manufacturing electrophotographic screen of cathode ray tube and cathode ray tube Download PDF

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Publication number
KR970012925A
KR970012925A KR1019950024029A KR19950024029A KR970012925A KR 970012925 A KR970012925 A KR 970012925A KR 1019950024029 A KR1019950024029 A KR 1019950024029A KR 19950024029 A KR19950024029 A KR 19950024029A KR 970012925 A KR970012925 A KR 970012925A
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South Korea
Prior art keywords
cathode ray
ray tube
particle size
phosphor particles
screen
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KR1019950024029A
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Korean (ko)
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KR100202851B1 (en
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윤상열
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엄길용
오리온전기 주식회사
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Priority to KR1019950024029A priority Critical patent/KR100202851B1/en
Publication of KR970012925A publication Critical patent/KR970012925A/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
    • H01J9/20—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
    • H01J9/2271—Applying luminescent coatings with luminescent material discontinuously arranged, e.g. in dots or lines by photographic processes
    • 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
    • H01J29/30—Luminescent screens with luminescent material discontinuously arranged, e.g. in dots, in lines
    • H01J29/32—Luminescent screens with luminescent material discontinuously arranged, e.g. in dots, in lines with adjacent dots or lines of different luminescent material, e.g. for colour television

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Formation Of Various Coating Films On Cathode Ray Tubes And Lamps (AREA)

Abstract

현상공정에서의 현상밀도를 증대시키기 위한 음극선관의 전자사진식 스크린 제조방법과 이에 의해 제조된 고밀도 형광체의 스크린을 지니는 음극선관을 제공한다. 판넬내면에 휘발성전도성막을 형성시키는 1차코팅 단계, 그 전도성막위에 자외선에 감응하는 물질을 함유하는 휘발성광전도막을 형성시키는 2차코팅 단계, 그 광전도막에 균일한 정전하를 대전시키는 대전단계; 그리고 그 광전도막의 정전하를 선택적으로 방출시키도록 자외선 광원으로 새도우마스크를 통과시켜 노광하는 노광단계, 미세분말을 방전전극을 통과시켜 대전시키면서 분사시켜, 상기 노광단계에서 정전하가 선택적으로 방출된 광전도막의 노광부분과 그 나머지 광전도막의 비노광부분중 어느 하나의 영역에 그 대전된 미세분말을 부착시키는 현상단계를 포함하는 전자사진식 음극선관의 스크린제조방법에 있어서, 상기 현상단계이전에 그 현상단계에 사용되는 비세분말중 11μ 이상의 입도를 가지는 대립자들을 제거하는 필터링단계를 추가로 구비하는 것이다. 또한, 본 발명은, 10μ 이하의 입자크기를 가지는 형광체입자들로 형성된 스크린을 지닌 음극선관을 제공한다. 이에 따라, 조밀하고 밀도가 높은 R, G, B형광체의 도트 내지 스트라이프를 얻을 수 있어, 중간고착공정을 생략할 수 있을 뿐만 아니라, 화질을 크게 향상시킬 수 있는 효과가 있다.Provided are a method for producing an electrophotographic screen of a cathode ray tube for increasing the development density in a developing step, and a cathode ray tube having a screen of a high-density phosphor produced thereby. A primary coating step of forming a volatile conductive film on an inner surface of the panel, a secondary coating step of forming a volatile photoconductive film containing a material sensitive to ultraviolet rays on the conductive film, and a charging step of charging a uniform electrostatic charge to the photoconductive film; An exposure step of exposing through a shadow mask with an ultraviolet light source to selectively discharge the electrostatic charge of the photoconductor film, and the fine powder is sprayed while passing through the discharge electrode, the electrostatic charge is selectively released in the exposure step In the screen manufacturing method of an electrophotographic cathode ray tube comprising a developing step of attaching the charged fine powder to one of the exposed portion of the photoconductive film and the non-exposed portion of the remaining photoconductive film, before the developing step. It further includes a filtering step of removing alleles having a particle size of 11μ or more in the non-powder used in the developing step. The present invention also provides a cathode ray tube having a screen formed of phosphor particles having a particle size of 10 μm or less. As a result, dots and stripes of dense, high-density R, G, and B phosphors can be obtained, and the intermediate fixing step can be omitted, and the image quality can be greatly improved.

Description

음극선관의 전자사진식 스크린 제조방법 및 이에 의한 음극선관Method for manufacturing electrophotographic screen of cathode ray tube and cathode ray tube

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제4도 (나)는 전자사진식 스크린제조방법 중 현상공정에서 현상된 상태를 도시한 부분확대평면도.4 (b) is a partially enlarged plan view showing a state developed in the developing process of the electrophotographic screen manufacturing method.

Claims (6)

판넬내면의 휘발성전도막을 형성시키는 1차코팅 단계, 그 전도막위에 자외선에 감응하는 물질을 함유하는 휘발성광전도막을 형성시키는 2차코팅 단계, 그 광전도막에 균일한 정전하를 대전시키는 대전단계; 그리고 그 광전도막의 정전하를 선택적으로 방출시키도록 자외선 광원으로 새도우마스크를 통과시켜 노광하는 노광단계, 미세분말을 방전전극을 통과시켜 대전시키면서 분사시켜, 상기 노광단계에서 정전하가 선택적으로 방출된 광전도막의 노광부분과 그 나머지 광전도막의 비노광부분 중 어느 하나의 영역에 그 대전된 미세분말을 부착시키는 현상단계를 포함하는 전자사진식 음극선관의 스크린제조방법에 있어서, 상기 현상단계 이전에 그 현상단계에 사용되는 비세분말중 11μ 이상의 입도를 가지는 대립자들을 제거하는 필터링단계를 추가로 구비하는 것을 특징으로 하는 전자사진식 음극선관의 스크린제조방법.A primary coating step of forming a volatile conductive film on the inner surface of the panel, a secondary coating step of forming a volatile photoconductive film containing a material sensitive to ultraviolet rays on the conductive film, and a charging step of charging a uniform electrostatic charge to the photoconductive film; An exposure step of exposing through a shadow mask with an ultraviolet light source to selectively discharge the electrostatic charge of the photoconductor film, and the fine powder is sprayed while passing through the discharge electrode, the electrostatic charge is selectively released in the exposure step A screen manufacturing method for an electrophotographic cathode ray tube comprising the step of attaching the charged fine powder to any one of an exposed portion of the photoconductive film and a non-exposed portion of the remaining photoconductive film, before the developing step. And a filtering step of removing alleles having a particle size of 11 mu or more of the non-powder used in the developing step. 제1항에 있어서, 상기 필터링단계가 블레인 방법(Blaine method) 내지 에프, 에스, 에스, 에스(F.S.S.S：Fisher Sub－sieve sizer)법에 의해 6μ 이상의 입도를 가지는 형광체입자들을 제거하는 단계인 것을 특징으로 하는 음극선관의 스크린 제조방법.The method of claim 1, wherein the filtering step is a step of removing phosphor particles having a particle size of 6 µ or more by a Blaine method to F, S, S, S (FSSS: Fisher Sub-sieve sizer) method. Screen manufacturing method of the cathode ray tube. 제1항에 있어서, 상기 필터링단계가 쿨린 카운터(Coulten counter)에 의해 8μ 이상의 입도를 가지는 형광체입자들을 제거하는 단계인 것을 특징으로 하는 전자사진식 음극선관의 스크린 제조방법.The method of claim 1, wherein the filtering step comprises removing phosphor particles having a particle size of 8 µ or more by a Coulten counter. 전자사진식 스크린제조방법에 의해 적어도 1종의 형광체가 소정의 배열로 형성된 스크린을 지니는 음극선관에 있어서, 상기 형광체가 10μ 이하의 입자크기를 가지는 형광체입자들로 형성된 것을 특징으로 하는 음극선관.A cathode ray tube having a screen in which at least one phosphor is formed in a predetermined arrangement by an electrophotographic screen manufacturing method, wherein the phosphor is formed of phosphor particles having a particle size of 10 μm or less. 제4항에 있어서, 상기형광체입자들이 블레인 방법(Blaine method) 내지 에프, 에스, 에스, 에스(F.S.S.S：Fisher Sub－sieve sizer)법에 의해 5μ 이하의 입도를 가지는 형광체입자인 것을 특징으로 하는 음극선관.The cathode ray beam according to claim 4, wherein the phosphor particles are phosphor particles having a particle size of 5 µ or less by a Blaine method to F, S, S, S (FSSS: Fisher Sub-sieve sizer) method. tube. 제4항에 있어서, 상기 형광체입자들이 쿨턴 카운터(Coulten counter)에 의해 8μ 이상의 입도를 가지는 형광체입자인 것을 특징으로 하는 음극선관.The cathode ray tube according to claim 4, wherein the phosphor particles are phosphor particles having a particle size of 8 mu or more by a Coulten counter. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019950024029A 1995-08-04 1995-08-04 Method of manufacturing electrophotographic screen of crt and crt therof KR100202851B1 (en)

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KR970012925A true KR970012925A (en) 1997-03-29
KR100202851B1 KR100202851B1 (en) 1999-06-15

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