KR19990030634A - Precoat liquid composition for color cathode ray tube - Google Patents
Precoat liquid composition for color cathode ray tube Download PDFInfo
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- KR19990030634A KR19990030634A KR1019970050931A KR19970050931A KR19990030634A KR 19990030634 A KR19990030634 A KR 19990030634A KR 1019970050931 A KR1019970050931 A KR 1019970050931A KR 19970050931 A KR19970050931 A KR 19970050931A KR 19990030634 A KR19990030634 A KR 19990030634A
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- 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
- H01J29/24—Supports for luminescent material
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2329/00—Electron emission display panels, e.g. field emission display panels
- H01J2329/18—Luminescent screens
- H01J2329/32—Means associated with discontinuous arrangements of the luminescent material
- H01J2329/326—Color filters structurally combined with the luminescent material
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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
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- Formation Of Various Coating Films On Cathode Ray Tubes And Lamps (AREA)
- Luminescent Compositions (AREA)
Abstract
본 발명 형광체층과 패널 내면 사이에 필타층을 갖는 형광면에 있어서 녹·청·적 3색의 색소를 동시에 분산한 슬러리를 판넬 내면에 도포하고, SPP를 주성분으로 하는 프리코트액을 도포하여 형광막 품위를 향상시키고 휘도를 향상시키기 위한 것이다. 이의 구성은 칼라 음극선관의 판넬내면에 BM층과 필타층이 형성되고, 상기 3색 혼합필타층위에 프리코트액을 코팅하고 그 위에 형광막을 형성하는 형광막에 있어서, 상기 프리코트층은 SPP와 콜로이달 실리카를 주성분으로 하는 프리코트 현탁액 조성물이다.In the fluorescent surface having a filter layer between the phosphor layer and the panel inner surface of the present invention, a slurry in which green, blue and red color pigments are dispersed at the same time is applied to the inner surface of the panel, and a precoat liquid containing SPP as a main component is applied to the fluorescent film. To improve the quality and to improve the brightness. The constitution of the present invention is a fluorescent film in which a BM layer and a filter layer are formed on an inner surface of a color cathode ray tube, and a precoat liquid is coated on the three-color mixed filter layer and a fluorescent film is formed thereon. It is a precoat suspension composition based on colloidal silica.
Description
본 발명은 형광체층과 패널 내면 사이에 필타층을 갖는 형광면에 있어서 녹, 청, 적 3색의 색소를 동시에 분산한 슬러리를 패널 내면에 도포하고 SPP를 주성분으로 하는 프리코트액을 도포하여 형광막 품위를 향상시키고 휘도를 향상시키기 위한 것이다.In the present invention, a fluorescent film having a pigment layer between a phosphor layer and an inner surface of a panel is coated with a slurry obtained by simultaneously dispersing three pigments of green, blue, and red on the inner surface of a panel, and a precoat liquid containing SPP as a main component is applied to the fluorescent film. To improve the quality and to improve the brightness.
일반적인 칼라 음극선관의 구성을 살펴보면 도 1에 도시된 바와 같이 음극선과의 전면에 장착되는 패널(1)과, 상기패널(1)의 내측에서 입사되는 전자빔의 색선별 기능을 갖는 새도우마스크와(6), 상기 새도우마스크(8)를 고정 지지하고 있는 프레임(7)과, 상기 패널(1)의 후면에 결합되어 내부를 진공 상태로 유지하는 펀넬(2)과, 상기 펀넬(2)의 후방으로 후퇴되어 있는 관형상의 네크부(2a)와, 내부에 장착되어 전자빔(3)을 방출하는 전자총(4)과, 상기 방출된 전자빔(3)에 작용되는 외부자계를 차단하기 위하여 프레임(7)이 조립되는 인너쉴드(8)와 상기 펀넬(2)의 외측을 둘러싸고 전자빔을 편향시키는 편향요크(5)로 구성된다.Referring to the configuration of a general color cathode ray tube, as shown in FIG. 1, a shadow mask having a color discrimination function of a panel 1 mounted on a front surface of a cathode ray and an electron beam incident from the inside of the panel 1 is provided (6). ), A frame 7 fixedly supporting the shadow mask 8, a funnel 2 coupled to the rear surface of the panel 1 to keep the interior in a vacuum state, and a rear of the funnel 2; A retracted tubular neck portion 2a, an electron gun 4 mounted therein to emit an electron beam 3, and a frame 7 to block an external magnetic field acting on the emitted electron beam 3 The inner shield 8 to be assembled and the deflection yoke 5 surrounding the outer side of the funnel 2 and deflecting the electron beam are constituted.
그리고 패널(1)의 내면에는 형강면이 형성되어 있는데, 이 형강면은 도 2에 나타낸 바와 같이 블랙메트릭스층(BM 층; 2) 및 적, 녹, 청 3색 혼합의 필타층(3)과 프리코트층(4)과 각각의 R, G, B 형광체층(5R, 5B, 5G)과 알루미늄막(6)으로 형성되어 전자빔의 적, 녹, 청의 형광체를 발생시켜 화상을 얻게 된다.The inner surface of the panel 1 is formed with a section steel surface, which is shown in FIG. 2, which has a black matrix layer (BM layer) 2 and a filter layer 3 of a mixture of red, green, and blue colors. It is formed of the precoat layer 4, the respective R, G, and B phosphor layers 5R, 5B, 5G, and the aluminum film 6 to generate red, green, and blue phosphors of the electron beam to obtain an image.
이때 R, G, B 형광막 형성시 형광체 슬러리를 감광제로 수용성 수직 SPP를 사용하는데 양이온성을 가지는 물질이다.At this time, when forming the R, G, B phosphor film, the phosphor slurry is a material having cationicity, using a water-soluble vertical SPP as a photosensitizer.
SPP : 폴리비닐알코올(PVA)과 비닐아세테이트의 공중합체와 4-[2-(4formilphenyl)ethenyl]-1-methylpyridinium염과 아세탈화된 물질 SPP의 화학 구조식을 보면SPP: Chemical structural formula of copolymer of polyvinyl alcohol (PVA) and vinyl acetate, 4- [2- (4formilphenyl) ethenyl] -1-methylpyridinium salt and acetalized material SPP
이러한 종래의 형광면의 제조방법은 BM층(2)이 형성된 패널(1)에 적, 청, 적 3색 혼합의 필타층(3)과 프리코트층(4)을 형성하고 그 위에 안료가 부착되지 않은 형광체를 사용해서 형광면을 형성하게 되는데 이는 3색 혼합 필터층에 의해 외광이 흡수되기 때문에 콘트라스트가 향상되는 장점이 있다.In the conventional method of manufacturing a fluorescent surface, a red, blue, and red color mixture of the filter layer 3 and the precoat layer 4 is formed on the panel 1 on which the BM layer 2 is formed, and no pigment is deposited thereon. The phosphor is used to form a fluorescent surface, which is advantageous in that contrast is improved because external light is absorbed by the three-color mixed filter layer.
그러나 이 경우 3색 혼합 필타 층(3) 위에 프리코트층(4)을 형성할 경우 3색 필타층(3)과의 부착력 저하로 형광막의 부착력을 떨어뜨려 막탈락 형상이 많이 일어나고 도 3과 같이 형광막 잘림(cutting) 상태가 나빠지고, 형광체 입자들이 타색에 남는(잔사) 문제가 있어 형광막 품위가 떨어짐은 물론 휘도가 저하하는 문제가 있었다.However, in this case, when the precoat layer 4 is formed on the three-color mixed filter layer 3, the adhesion force of the fluorescent film is dropped due to the decrease in the adhesion force with the three-color filter layer 3, thereby causing a large number of film dropout shapes. There is a problem in that the cutting state of the fluorescent film is bad and the phosphor particles remain in other colors (residues), so that the quality of the fluorescent film is degraded and the luminance is lowered.
본 발명은 상기한 바와 같이 종래 기술의 문제점을 해결하기 위하여 발명된 것으로 프리코트액 조성물을 변경하여 형성시킴으로서, 형광막 탈락과 형광막 잘림(cutting)을 좋게하고 타갯에 남는(잔사) 문제를 해결하여 형광막 품위를 올리고 휘도를 향상하는데 그 목적이 있다.The present invention is invented to solve the problems of the prior art as described above, by changing the precoat liquid composition to form, thereby improving the fall off of the fluorescent film and the cutting of the fluorescent film (cutting) and solve the problem of residual (residue) The purpose is to raise the quality of the fluorescent film and to improve the brightness.
도 1은 일반적인 음극선관의 개략도.1 is a schematic diagram of a typical cathode ray tube.
도 2는 종래 형광막 구조도.Figure 2 is a conventional fluorescent film structure diagram.
도 3은 종래 형광면 단면도.3 is a cross-sectional view of a conventional fluorescent surface.
도 4는 본 발명의 형광막 구조를 나타낸 것으로서,4 shows the structure of the fluorescent film of the present invention,
(가)는 BM층 위에 필터층이 도포된 상태도.(A) is a state where the filter layer was apply | coated on the BM layer.
(나)는 필터층 위에 프리코팅막과 형광체가 도포된 상태도.(B) is a state in which a precoat film and a phosphor are coated on a filter layer.
(다)는 형광막이 완료된 상태도.(C) is a state in which a fluorescent film is completed.
도 5는 본 발명의 형광면 단면도.5 is a cross-sectional view of the fluorescent surface of the present invention.
<도면의 주요부분에 대한 부호의 설명><Description of Symbols for Main Parts of Drawings>
101 : 패널 102 : BM층(Brack Matrix)101 panel 102 BM layer (Brack Matrix)
103 : 필터 104 : 프리코팅막103 filter 104 precoat film
106 ; 알루미늄막106; Aluminum film
이러한 목적을 달성하기 위한 본 발명의 구성을 첨부된 도면을 참조하여 상세히 설명하면 다음과 같다.When described in detail with reference to the accompanying drawings the configuration of the present invention for achieving this object are as follows.
본 발명은 도 4에 나타낸 바와 같이 BM층(102)이 형성된 패널 내면(101)과 형광체층(R, G, B) 사이에 필터층(103)을 갖고 필타층 위에 프리코트막(104)을 갖는 형광면에 있어서, 수용성 감광제 수지인 SPP를 주성분으로 하는 프리코트액을 3색 필타층 위에 형성하는 것이다.As shown in FIG. 4, the present invention has a filter layer 103 between the panel inner surface 101 on which the BM layer 102 is formed and the phosphor layers R, G, and B, and a precoat film 104 on the filter layer. In the fluorescent surface, a precoat liquid mainly composed of SPP, which is a water-soluble photosensitive resin, is formed on the three-color filter layer.
종래의 프리코트액은 폴리비닐알코올(PVA)과 폴리스티렌라텍스 그리고 콜로이달실리카 등을 순수와 배합한 용액을 사용하였다. (표 1참조)In the conventional precoat liquid, a solution in which polyvinyl alcohol (PVA), polystyrene latex, colloidal silica, and the like are combined with pure water is used. (See Table 1)
본 발명의 프리코트액은 SPP와 콜로이달실리카를 순수와 배합한 용액을 사용한다(표 2참조)The precoat liquid of this invention uses the solution which combined SPP and colloidal silica with pure water (refer Table 2).
[표 1]TABLE 1
종래 프리코트액Conventional precoat liquid
[표 2]TABLE 2
본 발명의 프리코트액Precoat liquid of the present invention
상기 종래 형광체 슬러리에 수용성 감광성 수지인 SPP가 들어감으로 형광체 입자에 SPP가 이온 흡착되어 형광체 슬러리를 양이온을 띠게 되어 3색혼합 필타층(103) 위에 잘 부착 된다.As SPP, which is a water-soluble photosensitive resin, enters into the conventional phosphor slurry, SPP is ion-adsorbed to the phosphor particles, so that the phosphor slurry bears a cation and adheres well onto the tricolor mixed filter layer 103.
이렇게 부착된 형광체는 광경화가 일어나지 않아도 부착력이 강해 현상을 해도 잘 떨어지지 않으므로 도 3과 같이 막 끝 잘림(cutting성)이 나쁘고 형광막 혼입(잔사)이 심하게 발생한다.Thus, the attached phosphor has a strong adhesion even without photocuring, and thus does not fall well even when developed. Thus, as shown in FIG. 3, the cutting of the film is bad and the mixing of the fluorescent film (residue) occurs badly.
본 발명에서는 형광체 슬러리에 첨가하는 감광제인 SPP를 프리코트액에도 첨가하여 3색혼합 필타층(103) 위에 전면 코팅함으로 3색 혼합 필타층이 양이온 성을 가지므로 형광막 도포시 형광체 슬러리가 양극 현상에 의해 접착성이 다소 저하되어 형광막 현상시 미노광부가 잘 현상됨으로 도 5처럼 형광막의 막 끌잘림(cutting)이 좋고 타색에 형광체가 남는 문제가 발생하지 않는다.In the present invention, the SPP, which is a photosensitive agent added to the phosphor slurry, is added to the precoat solution and coated on the three-color mixed filter layer 103, so that the three-color mixed filter layer has a cationic property. As a result, the adhesiveness is slightly lowered, so that the unexposed part is well developed during the development of the fluorescent film, so that the film is well cut and the phosphor remains in other colors as shown in FIG. 5.
이하 실시한 예를 상세히 설명한다.The following example will be described in detail.
감광성 수지인 SPP와 콜로이달실리카 그리고 순수의 고형분비가 0.6:0.6:100(실시예1)와 0.9:9.5:100(실시예 2)로 조합하여 1시간 이상 교반후 3색 혼합 필타층(103)이 완성된 패널글라스에 주입하고 회수 건조하여 녹색(5G), 청색(5B), 적색(5R)을 형성하여 확인한 결과(표 3)과 같으며 휘도를 측정한 결과(표 4)와 같은 결과를 얻었다.Solid content of SPP, colloidal silica, and pure water of photosensitive resin was combined into 0.6: 0.6: 100 (Example 1) and 0.9: 9.5: 100 (Example 2), followed by stirring for at least 1 hour. Injected into the finished panel glass, recovered and dried to form green (5G), blue (5B) and red (5R), and the results are as shown in Table 3 (Table 3). Got it.
[표 3]TABLE 3
형광막 상태Fluorescent film status
[표 4]TABLE 4
휘도 측정결과Luminance measurement result
(표 3)과 (표 4)에 나타낸 것 처럼 종래품의 경우 커팅(CUTTING)성과 형광체 혼입(잔사)이 많아 막품질이 떨어지나 본 발명에서는 프리코트액의 개선으로 막품질 및 휘도가 종래보다 3-5% 향상되었다.As shown in Tables 3 and 4, in the case of the conventional products, the film quality is deteriorated due to the high cutting property and the incorporation of phosphors (residues). However, in the present invention, the film quality and brightness are improved by improving the precoat liquid. 5% improvement.
본 발명에서는 도 4에 나타낸 것처럼 블랙매트릭스막(102)을 형성하고 그위에 3색 혼합필타층(103)을 형성하고 프리코트막(104')을 형성시킨후 녹색형광체 스러리를 도포하고 건조, 노광, 현상을 실시하면 녹색현광막(5G)이 만들어진다.In the present invention, as shown in FIG. 4, a black matrix film 102 is formed, a three-color mixed filter layer 103 is formed thereon, and a precoat film 104 'is formed, followed by applying a green phosphor slurry and drying, When the exposure and development are carried out, a green light film 5G is formed.
같은 방법으로 청색(5B), 적색(5R) 형광막을 차례로 형성하고 에멀젼막을 도포한 후 금속산화막(106)을 증착하면 도 5와 같은 깨끗한 형광막이 만들어진다.In the same manner, a blue (5B) and a red (5R) fluorescent film are formed in order, an emulsion film is applied, and then a metal oxide film 106 is deposited to produce a clean fluorescent film as shown in FIG. 5.
프리코트막(104')은 형광체 슬러리 조합시 사용되는 감광제인 SPP를 사용하는데 고형분 농도비가 0.9:0.5:100이 적당하다.The precoat film 104 'uses SPP, which is a photosensitive agent used for phosphor slurry combination, and a solid content ratio of 0.9: 0.5: 100 is suitable.
만약 감광성 수지인 SPP양이 너무 많으면 폴리비닐알코올량이 증가하여 고온열분해시 가스 방출량이 증가하여 금속반사막(106)이 부푸는 문제점이 있고, 첨가량이 너무 적으면 형광막 끝잘림(cutting)이 나빠지고 또한 형광체 혼입(잔사)이 많이 발생하여 타색에 혼입되므로 막품위를 떨어뜨림은 물론 휘도저하를 가져온다.If the amount of SPP, which is a photosensitive resin, is too high, the amount of polyvinyl alcohol increases and the amount of gas released during high-temperature pyrolysis increases, causing the metal reflective film 106 to swell. If the amount is too small, the cutting of the fluorescent film becomes worse. In addition, since a lot of phosphors (residues) are generated and mixed in other colors, the quality of the film is degraded and the brightness is reduced.
콜리이달실리카의 고형분량이 0.3% 이하가 되면 형광막의 접착력이 저하하여 형광막 탈락 현상이 발생한다.When the solid content of colloidal silica is 0.3% or less, the adhesive force of the fluorescent film is lowered, causing the fluorescent film to fall off.
또한 0.8% 이상이 되면 접착력이 너무 강해 형광막 혼입을 초래하며 이로 인해 휘도 저하가 일어난다.In addition, if it is more than 0.8%, the adhesive force is too strong, causing the mixing of the fluorescent film, resulting in a decrease in luminance.
이상 설명한 바와 같이 본 발명의 프리코트 조성물을 형광체 슬러리에 첨가되는 감광제인 SPP를 사용함으로 형광막의 끝잘림(cutting 성)을 좋게하고 형광체 혼입(잔사)를 방지할 수 있고 더불어 휘도를 3-5% 향상의 효과가 있다.As described above, by using SPP, which is a photosensitive agent added to the phosphor slurry, the precoat composition of the present invention can improve the cutting property of the fluorescent film and prevent the incorporation of the phosphor (residue), and the brightness is 3-5%. There is an effect of improvement.
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