KR19990012439A - Method for forming fluorescent film of color CRT - Google Patents
Method for forming fluorescent film of color CRT Download PDFInfo
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- KR19990012439A KR19990012439A KR1019970035830A KR19970035830A KR19990012439A KR 19990012439 A KR19990012439 A KR 19990012439A KR 1019970035830 A KR1019970035830 A KR 1019970035830A KR 19970035830 A KR19970035830 A KR 19970035830A KR 19990012439 A KR19990012439 A KR 19990012439A
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Abstract
칼라 브라운관의 형광막 형성방법에 관한 것으로서, 패널 글라스을 구비한 칼라 브라운관의 형광막 형성방법에 있어서, 상기 패널 글라스 내면에 녹, 청, 적색의 안료를 분말상태로 부착하여 칼라필터층을 형성하는 단계와, 상기 칼라필터층 위에 안료 부착이 안된 녹, 청, 적색 형광체를 분말상태로 각각 부착하여 형광면을 형성하는 단계를 포함하여 칼라 브라운관의 색순도, 휘도 및 콘트라스트를 향상시킨 것이다.A method for forming a fluorescent film of a color CRT tube, the method comprising: forming a color filter layer by attaching green, blue, and red pigments in powder form to an inner surface of the panel glass; In addition, the green, blue, and red phosphors, which are not attached to the pigment, are attached on the color filter layer to form a fluorescent surface, thereby improving color purity, luminance, and contrast of the color CRT.
Description
본 발명은 브라운관에 관한 것으로서, 특히 색순도, 휘도 및 콘트라스트를 향상시키는 칼라 브라운관의 형광막 형성방법에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a CRT, and more particularly to a method for forming a fluorescent film of a CRT which improves color purity, brightness and contrast.
도 1은 일반적인 칼라 브라운관의 개략 구조를 나타낸 단면도이다.1 is a cross-sectional view showing a schematic structure of a general color CRT.
도 1를 참조하면, 일반적인 칼라 브라운관은 전자빔에 의해 발광되고, 형광체가 도포되어진 패널(Panel)(10)과, 상기 전자빔을 발생시키는 전자총(11)이 봉입된 네크부(12)를 가지는 펀넬(Funel)(13)로 크게 나누어진다.Referring to FIG. 1, a general color CRT is a funnel having a panel 10 in which a light is emitted by an electron beam and a phosphor is coated, and a neck portion 12 in which an electron gun 11 for generating the electron beam is enclosed. Funel) is largely divided into (13).
상기 전자총(11)에서 방사된 전자빔이 프레임(14)에 의해 지지된 새도우마스크(15)를 통과하면서 색선별이 이루어져 패널(10)의 적, 녹, 청의 형광체를 발광시키므로서 화상을 얻게 되는데 형광체가 발광하는 스크린은 패널 내면쪽에 사진감광법에 의한 콘트라스트 향상을 위한 블랙 매트릭스(흑연)를 형성하고 그 위에 적, 청, 녹색의 안료 필터층을 슬러리 방식으로 설치하고 그 위에 적, 청, 녹색의 형광체를 슬러리 방식으로 스트라이프 혹은 돗트가 형성되어지며 그 위에 알루미늄 증착막이 증착되어 있다.As the electron beam radiated from the electron gun 11 passes through the shadow mask 15 supported by the frame 14, color selection is performed to emit red, green, and blue phosphors of the panel 10, thereby obtaining an image. The screen that emits light forms a black matrix (graphite) on the inner surface of the panel to improve contrast by photo-sensitization, and red, blue, and green pigment filter layers are installed thereon in a slurry manner, and red, blue, and green phosphors are disposed thereon. A stripe or dot is formed in a slurry manner, and an aluminum deposition film is deposited thereon.
상기 슬러리 방식은 일본 공개특허(공개번호 5-275006호)에 개시되어 있다.The slurry method is disclosed in Japanese Patent Laid-Open No. 5-275006.
도 2는 종래기술에 따른 칼라 브라운관의 형광막 형성 공정을 나타낸 순서도이다.Figure 2 is a flow chart showing a fluorescent film forming process of the color CRT according to the prior art.
도 2를 참조하면, 종래기술에 따른 칼라 브라운관의 형광막 형성 공정을 나타낸 순서도로써 먼저, 흑연막이 형성된 패널을 세척한 후 프리코트(Precoat) 액을 주입하고, 탈수, 건조한다.Referring to Figure 2, a flow chart illustrating a fluorescent film forming process of a color CRT according to the prior art, first, after washing the panel on which the graphite film is formed, the precoat liquid is injected, dehydrated, and dried.
이어, 청색 필터를 도포하여 건조한 후 감광액(Photoresist)을 도포하고, 건조한다.Then, a blue filter is applied and dried, and then a photoresist is applied and dried.
이어, 소정 패턴으로 청색 필터를 노광한 후, 현상, 건조한다.Next, after exposing a blue filter with a predetermined pattern, it develops and dries.
이어, 녹색 필터를 도포하여 건조한 후 감광액(Photoresist)을 도포하고, 건조한다.Then, the green filter is applied and dried, and then a photoresist is applied and dried.
이어, 소정 패턴으로 녹색 필터를 노광한 후 현상, 건조한다.Next, after exposing a green filter with a predetermined pattern, it develops and dries.
이어, 적색 필터를 도포하여 건조한 후 에칭액을 주입하며 청색, 녹색필터막 위에 감광액막을 현상하여 적색필터를 형성한다.Subsequently, a red filter is applied and dried, and then an etching solution is injected to form a red filter by developing a photoresist film on a blue and green filter film.
이어, 형광체 적, 녹, 청 슬러리를 도포한다.Subsequently, the phosphor red, green and blue slurry are applied.
이와 같이 구성된 종래기술에 따른 형광막 형성방법은 콘트라스트 향상을 위해 블랙매트릭스와 형광체층 사이에 안료층을 설치하여 콘트라스트를 향상시켰으나 공정이 복잡하고, 공정시간이 너무 길어 생산성이 떨어지는 문제점이 있다.The fluorescent film forming method according to the prior art configured as described above improves the contrast by installing a pigment layer between the black matrix and the phosphor layer to improve the contrast, but there is a problem that the process is complicated and the process time is too long, resulting in low productivity.
본 발명은 이와 같은 종래기술에 따른 문제점을 해결하기 위하여 안출한 것으로서, 본 발명의 목적은 패널 내면의 형광막의 외부광 반사를 선택적으로 줄여주고, 발광색 외의 다른 광은 선택적으로 흡수하는 칼라 필터를 설치하여 색순도, 휘도 및 콘트라스트가 우수한 칼라 브라운관의 형광막 형성방법을 제공함에 있다.The present invention has been made to solve the problems according to the prior art, an object of the present invention is to selectively reduce the external light reflection of the fluorescent film on the inner surface of the panel, and to install a color filter to selectively absorb other light than the emission color The present invention provides a method for forming a fluorescent film of a color CRT tube having excellent color purity, brightness, and contrast.
도 1은 일반적인 칼라 브라운관의 개략 구조를 나타낸 단면도,1 is a cross-sectional view showing a schematic structure of a general color CRT;
도 2는 종래기술에 따른 칼라 브라운관의 형광막 형성 공정을 나타낸 순서도,2 is a flow chart showing a fluorescent film forming process of a color CRT according to the prior art;
도 3a 내지 도 3j는 본 발명에 따른 칼라 브라운관의 형광막 형성 공정을 나타낸 단면도,3A to 3J are cross-sectional views illustrating a process for forming a fluorescent film of a color CRT according to the present invention;
도 4는 본 발명에 따른 칼라 브라운관의 형광막 형성 공정을 나타낸 순서도,4 is a flowchart showing a process for forming a fluorescent film of a color CRT according to the present invention;
도 5a 내지 도 5c는 본 발명에 따른 칼라 브라운관의 각 필터와 형광체 투과 스팩트럼을 나타낸 도면이다.5A to 5C show each filter and phosphor transmission spectrum of the color CRT according to the present invention.
도면의 주요부분에 대한 부호의 설명Explanation of symbols for main parts of the drawings
10 : 패널 11 : 전자총10 panel 11: electron gun
12 : 네크부 13 : 펀넬12: neck part 13: funnel
14 : 프레임 15 : 새도우마스크14 frame 15 shadow mask
16 : 감광성수지 용액 17G, 17R, 17B : 녹, 적, 청색 필터16: photosensitive resin solution 17G, 17R, 17B: green, red, blue filter
18G, 18R, 18B : 녹, 적, 청색 형광막18G, 18R, 18B: green, red, blue fluorescent film
본 발명에 따른 칼라 브라운관의 형광막 형성방법의 특징은, 패널 글라스을 구비한 칼라 브라운관의 형광막 형성방법에 있어서, 상기 패널 글라스 내면에 녹, 청, 적색의 안료를 분말상태로 부착하여 칼라필터층을 형성하는 단계와, 상기 칼라필터층 위에 안료 부착이 안된 녹, 청, 적색 형광체를 분말상태로 각각 부착하여 형광면을 형성하는 단계를 포함하여 패널 글라스 내면의 녹, 청, 적색필터층과 녹, 청 적 형광막을 분말 상태로 형성하여 광반사율을 낮추어 휘도, 색순도 및 콘트라스트를 향상시키고 공정을 단순화하여 생산성을 향상시키는데 있다.The fluorescent film forming method of the color CRT tube according to the present invention is characterized in that, in the fluorescent film forming method of the color CRT tube having the panel glass, the color filter layer is attached to the inner surface of the panel glass by adhering green, blue and red pigments in powder form. And forming a fluorescent surface by attaching green, blue, and red phosphors, which are not attached with pigments, onto the color filter layer in powder form, respectively, to form green, blue, and red filter layers on the inner surface of the panel glass. The film is formed in a powder state to lower light reflectance to improve brightness, color purity and contrast, and to simplify the process to improve productivity.
이하, 본 발명에 따른 칼라 브라운관의 형광막 형성방법의 바람직한 실시예를 첨부된 도면을 참조하여 설명하면 다음과 같다.Hereinafter, with reference to the accompanying drawings a preferred embodiment of the fluorescent film forming method of the color CRT according to the present invention will be described.
도 3a 내지 도 3j는 본 발명에 따른 칼라 브라운관의 형광막 형성 공정을 나타낸 단면도이고, 도 4는 본 발명에 따른 칼라 브라운관의 형광막 형성 공정을 나타낸 순서도이다.3A to 3J are cross-sectional views illustrating a process for forming a fluorescent film of a color CRT according to the present invention, and FIG. 4 is a flowchart illustrating a process to form a fluorescent film to a CRT according to the present invention.
도 3 및 도 4를 참조하면, 본 발명에 따른 칼라 브라운관의 형광막 형성 공정을 나타낸 단면도로써 먼저, 도 3a에 나타낸 바와 같이, 칼라 브라운관의 패널(10) 내면 상에 빛이 조사되면 점착성을 갖는 감광성수지 용액(16)을 일정 두께로 도포시킨 후 건조한다.3 and 4, a cross-sectional view showing a fluorescent film forming process of a color CRT according to the present invention. First, as shown in FIG. 3A, when light is irradiated onto the inner surface of the panel 10 of the CRT, the adhesive film has adhesiveness. The photosensitive resin solution 16 is applied to a predetermined thickness and then dried.
이어, 도 3b에 나타낸 바와 같이, 새도우마스크(15)를 이용하여 칼라 브라운관의 패널(10) 내면 상에 도포된 감광성수지 용액을 선택적으로 노광하여 빛이 조사된 부위의 감광성수지만 점착성을 갖는다.3B, the photosensitive resin solution applied on the inner surface of the panel 10 of the color CRT is selectively exposed using the shadow mask 15, but only the photosensitive resin of the irradiated part has adhesiveness.
이어, 도 3c에 나타낸 바와 같이, 잔존하는 감광성수지 용액(16)을 포함한 패널 전면에 녹색안료(CoO-Cr2O3-TiO2-Al2O3)(17G)를 분말 상태로 일정 두께 도포한다.Next, as shown in FIG. 3C, a green pigment (CoO-Cr 2 O 3 -TiO 2 -Al 2 O 3 ) (17G) is applied to the front surface of the panel including the remaining photosensitive resin solution 16 in a predetermined thickness. do.
이어, 도 3d에 나타낸 바와 같이, 감광성수지가 점착성을 띄는 부분은 녹색 안료가 부착되어 녹색필터층(17G)이 형성되며, 고압의 압축공기를 분사하여 노광되지 않은 부위, 즉 점착성을 띄지 않은 부위에 도포된 안료를 제거한다.Then, as shown in Figure 3d, the photosensitive resin is sticky to the green pigment is attached to the green filter layer (17G) is formed, the high-pressure compressed air by spraying the exposed portion, that is, the non-sticky portion The applied pigment is removed.
이어, 상기와 같은방식(3b∼3d)를 반복하여 적색안료(Fe2O3), 청색안료(CoO-Al2O3)를 분말 상태로 분사하여 도 3e에 나타낸 바와 같이, 적, 청색필터층(17R, 17B)을 형성한다.Subsequently, red pigment (Fe2O3) and blue pigment (CoO-Al 2 O 3 ) are sprayed in a powder state by repeating the same method (3b to 3d) as shown in FIG. 3E. 17B).
이어, 도 3f에 나타낸 바와 같이, 녹, 적, 청색필터층(17G, 17R, 17B) 상에 점착성을 갖는 감광성수지 용액을 스핀법으로 일정 두께로 도포시킨 후 건조한다.Subsequently, as shown in FIG. 3F, the photosensitive resin solution having adhesiveness on the rust, red, and blue filter layers 17G, 17R, and 17B is applied to a predetermined thickness by a spin method and then dried.
이어, 도 3g에 나타낸 바와 같이, 새도우마스크(15)를 이용하여 녹, 적, 청색필터층(17G, 17R, 17B) 상에 도포된 감광성수지 용액(16)을 선택적으로 노광하여 빛이 조사된 부위의 감광성수지만 점착성을 갖는다.Then, as shown in Figure 3g, using the shadow mask 15 to selectively expose the photosensitive resin solution 16 applied on the green, red, blue filter layer (17G, 17R, 17B) to the light irradiation site Although the photosensitive resin of has adhesiveness.
이어, 도 3h에 나타낸 바와 같이, 상기 감광성수지층 위에 녹색형광체(18G)를 분말상태로 일정두께 도포한다.Subsequently, as shown in FIG. 3H, the green phosphor 18G is coated on the photosensitive resin layer in a powdered state.
이어, 도 3i에 나타낸 바와 같이, 감광성수지가 점착성을 띄는 부분은 녹색형광체(18G)가 부착되어 녹색형광막(18G)이 형성되며, 고압의 압축공기를 분사하여 노광되지 않은 부위, 즉 점착성을 띄지 않은 부위에 도포된 안료를 제거한다.Next, as shown in FIG. 3I, the portion where the photosensitive resin is sticky is attached to the green phosphor 18G to form the green phosphor film 18G, and the portion that is not exposed by spraying high-pressure compressed air, that is, adhesiveness Remove the pigment applied to the inconspicuous area.
이어, 상기와 같은 방식(3g∼3i)를 반복해서 도 3j에 나타낸 바와 같이, 적, 청색형광막(18R, 18B)을 형성한다.Subsequently, the above-described methods (3g to 3i) are repeated to form red and blue fluorescent films 18R and 18B as shown in Fig. 3J.
따라서, 도 5a 내지 도 5c에 나타낸 바와 같이, 칼라 필터를 통한 선택적 광 흡수성을 이용하여 패널 글라스의 투과율을 높이고 형광체에 부착된 안료를 제거함으로써 색순도, 휘도 및 콘트라스트를 향상시킬 수 있다.Accordingly, as shown in FIGS. 5A to 5C, color purity, brightness, and contrast can be improved by increasing the transmittance of the panel glass and removing the pigment attached to the phosphor by using selective light absorption through the color filter.
그리고 상기의 감광성수지 용액의 조성물은 증류수 50∼60wt%, 폴리비닐알콜(Polyvinlyalcohol) 15∼20wt%, 디아조늄염(Diazoniumsalt) 5∼10wt%, 프로필렌글리콜-에스테르(Propyleneglycol-ester) 5∼10wt%, 아크릴에멀젼(Acrylicemulsion) 1∼5wt%, 계면활성제 1∼5wt%로 구성되어 있다.The composition of the photosensitive resin solution is 50 to 60 wt% of distilled water, 15 to 20 wt% of polyvinlyalcohol, 5 to 10 wt% of diazonium salt, and 5 to 10 wt% of propylene glycol-ester. And acrylic emulsion (Acrylicemulsion) 1 to 5wt%, surfactant 1 to 5wt%.
본 발명에 따른 칼라 브라운관의 형광막 형성방법은 분말상태로 안료와 형광체를 도포하고 공기 현상 처리하기 때문에 안료, 형광체의 충진밀도가 높고 사용량 및 손실이 극히 적고, 회수성이 용이하며 물의 사용 및 그에 수반하는 건조가 불필요하여 원가 절감 및 공정 단순화로 생산성이 크게 향상되는 효과가 있다.The method for forming a fluorescent film of a color CRT tube according to the present invention has a high packing density of pigments and phosphors, extremely low amount of use and loss, easy recovery, and easy use of water, because the pigment and phosphors are coated in a powder state and subjected to air development. Since the drying is not necessary, productivity is greatly improved due to cost reduction and process simplification.
그리고 화상의 특성중 가장 중요한 광학 특성중의 하나인 콘트라스트 특성을 녹, 청, 적색 필터를 통해 외부광을 선택적으로 반사시키고 형광체에서 발광된 광을 선택적으로 투과시켜 콘트라스트 및 색순도를 향상시켜준다.The contrast characteristic, which is one of the most important optical characteristics of the image, is selectively reflected by external light through the green, blue, and red filters, and selectively transmits the light emitted from the phosphor to improve contrast and color purity.
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KR100303843B1 (en) * | 1999-03-31 | 2001-10-29 | 김순택 | Method of fluorcent screen manufacturing for electron tube and electron tube thereof |
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JPH02283789A (en) * | 1988-12-21 | 1990-11-21 | Rca Licensing Corp | Method for surface treatment of dried powdery phosphor particle used for manufacture of cathode ray tube screen, and cathode ray tube |
JPH05275007A (en) * | 1992-03-25 | 1993-10-22 | Sony Corp | Formation of phosphor screen of cathode-ray tube |
JPH08106859A (en) * | 1994-10-05 | 1996-04-23 | Interface Gijutsu Kenkyusho:Kk | Color cathode-ray tube |
JPH08236019A (en) * | 1995-02-23 | 1996-09-13 | Hitachi Ltd | Manufacture of color cathode ray tube |
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1997
- 1997-07-29 KR KR1019970035830A patent/KR19990012439A/en not_active Application Discontinuation
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Publication number | Priority date | Publication date | Assignee | Title |
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JPH02283789A (en) * | 1988-12-21 | 1990-11-21 | Rca Licensing Corp | Method for surface treatment of dried powdery phosphor particle used for manufacture of cathode ray tube screen, and cathode ray tube |
JPH05275007A (en) * | 1992-03-25 | 1993-10-22 | Sony Corp | Formation of phosphor screen of cathode-ray tube |
JPH08106859A (en) * | 1994-10-05 | 1996-04-23 | Interface Gijutsu Kenkyusho:Kk | Color cathode-ray tube |
JPH08236019A (en) * | 1995-02-23 | 1996-09-13 | Hitachi Ltd | Manufacture of color cathode ray tube |
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KR100303843B1 (en) * | 1999-03-31 | 2001-10-29 | 김순택 | Method of fluorcent screen manufacturing for electron tube and electron tube thereof |
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