KR920001836B1 - Cathode ray tube - Google Patents
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- KR920001836B1 KR920001836B1 KR1019890012977A KR890012977A KR920001836B1 KR 920001836 B1 KR920001836 B1 KR 920001836B1 KR 1019890012977 A KR1019890012977 A KR 1019890012977A KR 890012977 A KR890012977 A KR 890012977A KR 920001836 B1 KR920001836 B1 KR 920001836B1
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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
- H01J29/28—Luminescent screens with protective, conductive or reflective layers
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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
- H01J29/86—Vessels; Containers; Vacuum locks
- H01J29/88—Vessels; Containers; Vacuum locks provided with coatings on the walls thereof; Selection of materials for the coatings
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Abstract
Description
제1도는 본 발명의 음극선관 패널의 단면도.1 is a cross-sectional view of the cathode ray tube panel of the present invention.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
1 : 음극선관 패널 2 : 도전층1 cathode
3 : 도전막 보호층3: conductive film protective layer
본 발명은 음극선관에 관한 것으로서, 특히 음극선관 패널외면에서의 대전을 방지하고, 막강도가 향상된 음극선관에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cathode ray tube, and more particularly, to a cathode ray tube that prevents charging on an outer surface of a cathode ray tube panel and improves film strength.
통상 음극선관(CRT), 액정표시기(LCD)등의 영상표시장치에는 그 앞면에 유리 또는 플라스틱등의 각종 투명 기재가 사용되고 있으나, 이와 같은 각종 투명기재는 절연체이므로 그 표면에서 정전기가 생기기 쉬우며, 특히 액정표시기(LCD)등의 표시장치에서는 정전기에 의해 오동작(誤動作)이 일어난다.In general, various transparent substrates such as glass or plastic are used on the front surface of a video display device such as a cathode ray tube (CRT) and a liquid crystal display (LCD), but since these various transparent substrates are insulators, static electricity is easily generated on the surfaces thereof. In particular, in a display device such as a liquid crystal display (LCD), malfunction occurs due to static electricity.
최근에 대형 음극선관의 수요가 증가하면서 패널 외면에서의 정전기 축적이 문제가 되고 있다. 대형 음극선관의 양극은 약 30 내지 32KV의 높은 작동전압전위를 갖으며, 음극선관이 턴온되거나 턴오프되면 패널은 전기적으로 충전된다.Recently, as the demand for large cathode ray tubes increases, the accumulation of static electricity on the outside of the panel becomes a problem. The anode of a large cathode ray tube has a high operating voltage potential of about 30 to 32 KV, and the panel is electrically charged when the cathode ray tube is turned on or off.
이와 같이 양극전압이 커지면 조작자가 전기적인 쇼크를 받을 가능성이 커지고, 패널표면의 충전으로 먼지가 그 표면에 부착된다. 이로 인해 음극선관의 휘도와 콘트라스트는 저하되고 화상의 선명도도 떨어지게 된다.In this way, when the anode voltage increases, the operator is more likely to receive an electric shock, and dust is adhered to the surface by charging the panel surface. As a result, the brightness and contrast of the cathode ray tube are lowered and the sharpness of the image is lowered.
또한 음극선관 패널 표면은 통상 유리면으로 되어 있기 때문에 외부광을 반사하기가 용이하고 이로 인해 패널면에 나타나는 화상의 시청이 어려운 문제가 있다.In addition, since the surface of the cathode ray tube panel is usually a glass surface, it is easy to reflect external light, and thus there is a problem that viewing of an image appearing on the panel surface is difficult.
일본 특개소 61-118932호, 61-118946호에서는 패널외면에 Si(OR)4(R은 알킬기)의 알코올용액을 도포하여 80℃ 내지 150℃에서 소성함으로써 대전방지성을 갖는 음극선관에 대하여 기술하고 있다.Japanese Patent Laid-Open Nos. 61-118932 and 61-118946 describe a cathode ray tube having antistatic properties by coating an alcohol solution of Si (OR) 4 (R is an alkyl group) on a panel outer surface and firing it at 80 ° C to 150 ° C. Doing.
그러나 상기 방법으로 얻어진 막은 강도가 약하고, 도전성이 나빠서 시간에 따라 표면저항이 커지는 경향이 있다.However, the film obtained by the above method tends to have low strength, poor conductivity, and large surface resistance with time.
일본특개소 60-221937호, 63-158724호는 패널외면을 조면(粗面)으로 하고 그위에 4염화규소를 일가의 알코올류, 에스테르류의 콜로이드 용액에 용해한 대전방지 도료를 도포하여 도포막을 형성하는 음극선관에 대하여 기술하고 있으며, 일본 특개소 63-158733호, 63-160131호는 Si의 알콜레이트를 패널외면에 도포하고 소성하여 SiO2막을 형성시키는 음극선관에 대해 기술하고 있으나, 이는 외부환경, 특히 습도에 따라 표면저항치의 불안정한 변화와 소성온도에 따른 특성변화의 문제가 매우 심각하다.Japanese Patent Application Laid-Open Nos. 60-221937 and 63-158724 form a coating film by applying an antistatic paint in which the outer surface of the panel is roughened and silicon tetrachloride is dissolved in a colloidal solution of monohydric alcohols and esters. Japanese Patent Application Laid-Open Nos. 63-158733 and 63-160131 describe cathode ray tubes which apply Si alcoholate to the outer surface of a panel and fire them to form SiO 2 films. In particular, the problem of unstable change in surface resistance with humidity and change in properties with firing temperature is very serious.
미국특허 제4,563,612호와 유럽특허 제283,128호는 패널외면에 반사방지성을 부여하여 조(粗) 표면을 갖게 하고, Si에 의한 도전성을 보다 향상시키기 위해 Pt, Pd, Sn, Au 및 Zr등의 금속화합물을 사용한 음극선관에 대하여 기술하고 있다.U.S. Patent No. 4,563,612 and European Patent No. 283,128 provide anti-reflective properties to the outer surface of the panel to provide a rough surface, and to improve conductivity by Si, such as Pt, Pd, Sn, Au, and Zr. It describes a cathode ray tube using a metal compound.
또한 일본특개소 62-176946호, 62-280286호 및 63-152675호는 Si 화합물을 알코올 용매중에서 균일하게 혼합한 후 얻어진 알코올성 실리카졸에 도전성 금속화합물을 첨가하여 된 정전기방지성 피복조성물에 대하여 기술하고 있으나, 도전층의 강도가 약하여 외부의 물리적인 힘에 의해 도전층이 크게 손상되는 현상이 일어나는 문제가 있다.Also, Japanese Patent Laid-Open Nos. 62-176946, 62-280286, and 63-152675 describe an antistatic coating composition obtained by adding a conductive metal compound to an alcoholic silica sol obtained by uniformly mixing a Si compound in an alcohol solvent. However, since the strength of the conductive layer is weak, there is a problem that the conductive layer is greatly damaged by external physical forces.
본 발명의 목적은 상기한 종래 기술의 문제점을 감안하여, 안정한 대전방지성과 충분한 강도를 가지며 제조가 용이한 대전방지막을 형성하고, 패널외면에서의 반사 및 해상도의 저하를 방지할 수 있으며, 물리적인 영향 및 화학적인 요소에 의한 파손으로부터 막을 보호할 수 있는 음극선관을 제공하는 것이다.SUMMARY OF THE INVENTION In view of the problems of the prior art described above, an object of the present invention is to provide a stable antistatic property and sufficient strength, to form an antistatic film that is easy to manufacture, and to prevent reflections and deterioration of resolution from the outer surface of the panel, It is to provide a cathode ray tube that can protect the membrane from damage caused by influence and chemical factors.
상기 목적을 달성하기 위하여 본 발명에서는 음극선관의 패널 외면에 도전층 조성물 총량에 대해 1 내지 20중량%의 주석염화물 및 안티몬 염화물을 함유하여 이루어진 도전성 물질과, 알코올류, 케톤 및 아세트산 염류등의 용매와 도전층 조성물 총량에 대해 1 내지 20중량%의 Si 알콕사이드로 이루어진 바인더 물질을 포함하여 된 혼합물을 도포하여 형성된 도전층과, 상기 도전층의 상부에 도전막 보호층 조성물 총량에 대해 70 내지 95중량%의 상기 바인더 물질, 물 및 산을 포함하여 된 혼합물을 도포하여 형성된 도전막 보호층을 구비하는 것을 특징으로 하는 음극선관을 제공한다.In order to achieve the above object, in the present invention, a conductive material comprising 1 to 20% by weight of tin chloride and antimony chloride based on the total amount of the conductive layer composition on the outer surface of the cathode ray tube, and solvents such as alcohols, ketones and acetic acid salts. And a conductive layer formed by applying a mixture comprising a binder material of 1 to 20% by weight of Si alkoxide based on the total amount of the conductive layer composition, and 70 to 95% by weight of the total amount of the conductive film protective layer composition on the conductive layer. Provided is a cathode ray tube comprising a conductive film protective layer formed by applying a mixture comprising% of the binder material, water and acid.
본 발명의 음극선관은 다음과 같이 제조된다.The cathode ray tube of the present invention is manufactured as follows.
도전층 조성물 총량에 대해 1 내지 20중량%의 주석염화물(SnCl4, nH2O)과 안티몬염화물(SbCl3)을 각각 알코올 용매에 녹이고, 약 3 : 1의 비율로 혼합하여 도전성물질을 얻는다.1 to 20% by weight of tin chloride (SnCl 4 , nH 2 O) and antimony chloride (SbCl 3 ) are dissolved in an alcohol solvent, and the mixture is mixed in a ratio of about 3: 1 to obtain a conductive material.
또한 알코올류, 케톤류 및 아세트산염류등의 용매와 도전층 조성물 총량에 대해 1 내지 20중량%의 Si 알콕사이드를 혼합한 후 충분히 교반하여 바인더 물질을 얻는다.Further, solvents such as alcohols, ketones, acetates, and the like, with 1-20 wt% of the Si alkoxide based on the total amount of the conductive layer composition, are mixed and sufficiently stirred to obtain a binder material.
이와 같이 얻어진 도전성물질과 바인더물질을 혼합하여 된 혼합물을 음극선관 패널외면에 스핀법이나 디핑법으로 도포한다.The mixture obtained by mixing the conductive material and the binder material thus obtained is coated on the outer surface of the cathode ray tube panel by the spin method or the dipping method.
이와 같이 혼합물이 도포된 패널(1) 외면은 실온에서 장기간 방치하거나 또는 100 내지 200℃의 온도에서 10분 내지 2시간동안 소성한후, 실온에서 서냉하여 도전층(2)을 형성한다.The outer surface of the panel 1 to which the mixture is applied is left for a long time at room temperature or calcined at a temperature of 100 to 200 ° C. for 10 minutes to 2 hours, and then cooled slowly at room temperature to form the
다음에 도전막 보호층 조성물 총량에 대해 70 내지 95중량%의 상기 바인더 물질과 물, 그리고 염산, 질산등의 산을 첨가하여 혼합물을 얻는다. 얻어진 상기 혼합물을 도전층위에 도포하는데, 이때 편평한 보호층을 얻기 위해서는 스핀법이나 디핑법을 사용하고, 요철(凹凸)사방지피막을 형성시켜 방현 효과를 높이기 위해서는 스프레이법을 사용한다.Next, 70 to 95% by weight of the binder material, water, and acids such as hydrochloric acid and nitric acid are added to the total amount of the conductive film protective layer composition to obtain a mixture. The obtained mixture is applied onto the conductive layer. At this time, a spin method or a dipping method is used to obtain a flat protective layer, and a spray method is used to increase the anti-glare effect by forming an uneven anti-fogging film.
이와 같이 도포한 후 실온에서 장시간 방치하거나 또는 100 내지 200℃의 온도에서 10분 내지 2시간동안 소성하면 도전막 보호층(3)이 형성된다.After coating in this way, the conductive film
본 발명에 따라 제조되는 음극선관의 도전층 및 도전막 보호층의 형성과정은 다음과 같다.The formation process of the conductive layer and the conductive film protective layer of the cathode ray tube manufactured according to the present invention is as follows.
먼저 Si 알콕사이드의 가수분해반응은 산촉매하에서 다음과 같이 진행된다.First, the hydrolysis reaction of Si alkoxide proceeds as follows under an acid catalyst.
≡Si-OCH2CH2+H2O→≡Si-OH+CH3CH2OH-Si-OCH 2 CH 2 + H 2 O → ≡Si-OH + CH 3 CH 2 OH
이후 다음과 같은 중축합 반응이 진행된다.Thereafter, the following polycondensation reaction proceeds.
≡Si-OH+OH-Si≡→≡Si-O-Si≡+H2O≡Si-OH + OH-Si≡ → Si-O-Si≡ + H 2 O
≡Si-OH+CH3CH2O-Si≡→≡Si-O-Si≡+CH3CH2OH≡Si-OH + CH 3 CH 2 O-Si≡ → Si-O-Si≡ + CH 3 CH 2 OH
소성공정등을 거쳐서 최후로 얻어지는 물질은 Si(O4)1/2이므로 전체 반응을 표현하면 다음과 같다.The final material obtained through the sintering process is Si (O 4 ) 1/2, so the overall reaction is expressed as follows.
Si(OCH2CH3)4+2H2O→Si(O4)1/2+4CH3CH2OHSi (OCH 2 CH 3 ) 4 + 2H 2 O → Si (O 4 ) 1/2 + 4CH 3 CH 2 OH
상기 반응에서 알코올 등의 유기용매는 Si 실리케이트와 물이 섞이지 않으므로, 섞이게 하는 중간매체 역활을 하게 되며 코팅시, 특히 스핀코팅시 도포막의 평활성에 영향을 주는 역할을 하게 된다. 그리고 휘발성이 강하여 최종적으로는 남아 있지 않게 된다.In the above reaction, the organic solvent such as alcohol does not mix with the Si silicate and water, and thus serves as an intermediate medium to be mixed, and plays a role in affecting the smoothness of the coating film during coating, particularly during spin coating. And the volatility is so strong that it does not remain in the end.
그리고 도전층 제조에 사용되는 주석(Sn)과 안티몬(Sb)은 Si 알콕사이드 용액내에서 처음에는 Sn과 Sb가 포함된 상태의 졸을 형성하고 이후 Sn과 Sb가 포함된 상태의 겔을 형성한다. 계속해서 건조시키면 다공성 건조겔이 되어 고용화된다.In addition, tin (Sn) and antimony (Sb) used to prepare a conductive layer first form a sol in a state containing Sn and Sb in a Si alkoxide solution, and then form a gel in a state containing Sn and Sb. Continued drying results in a porous drying gel that is solid solution.
제1도는 본 발명에 따른 음극선관 패널의 단면도로서 그 미세구조가 확대도면으로 나타나 있다. 패널유리와 도전층간, 그리고 도전층과 도전막 보호층간은 수소결합에 의하여 부착되고 있고 Sn, Sb 금속은 산소와 결합되어 직접 도전층막을 형성하기로 하고, 막내에 분산되기도 한다.1 is a cross-sectional view of a cathode ray tube panel according to the present invention, the microstructure of which is shown in an enlarged view. The panel glass and the conductive layer, and the conductive layer and the conductive film protective layer are attached by hydrogen bonding, and the Sn and Sb metals are combined with oxygen to form a conductive layer film directly, and may be dispersed in the film.
이와 같이 하여 얻어진 음극선관의 패널의 표면저항은 1×107내지 1×1011Ω이고, 정전기 감쇄도는 초기치가 0KV까지 저하되는데 소요되는 시간이 10초이내이다. 또한 도전막 보호층은 연필강도가 9H, 지우개 문지름 300회로 매우 양호하고, 내수성 및 내알콜성도 매우 양호하다.The surface resistance of the panel of the cathode ray tube thus obtained is 1 × 10 7 to 1 × 10 11 Ω, and the electrostatic attenuation time is less than 10 seconds for the initial value to decrease to 0 KV. In addition, the conductive film protective layer has a very good pencil strength of 9H and an eraser rub of 300 times, and also has excellent water resistance and alcohol resistance.
패널의 외부층은 도전성물질을 포함한 도포액으로 처리하여, 발생되는 정전기가 도전층을 통하여 쉽게 흐르도록 하여 주므로써, 정전기에 의한 전기적 쇼크를 줄이고 인체로의 코로나 방전을 최소화하고 패널표면에 먼지등의 이물질의 부착이 없게 된다. 그리고 도전층위에 Si를 포함한 도포액으로 처리하여 도전막 보호층을 형성함으로써 도전성물질에 의한 도전층의 막강도 저하와 막파손을 방지할 수 있게 된다. 스프레이법을 사용하여 도전막 보호층을 형성하여 요철무늬의 반사방지피막을 형성하게 되면 패널면에 나타나는 화상을 시청하는데 어려움이 없게 된다.The outer layer of the panel is treated with a coating liquid containing a conductive material so that the generated static electricity flows easily through the conductive layer, thereby reducing the electric shock caused by static electricity, minimizing corona discharge to the human body, and dust on the panel surface. There is no adhesion of foreign matter. The conductive film protective layer is formed by treating with a coating liquid containing Si on the conductive layer, thereby preventing the lowering of the film strength and the breakage of the conductive layer by the conductive material. When the conductive film protective layer is formed using the spray method to form the antireflection coating with the uneven pattern, it becomes difficult to see the image appearing on the panel surface.
이상에서 설명한 바와 같이, 본 발명에 의하면 음극선관의 패널외면에 도전층과 도전막 보호층으로 된 2중의 층을 형성함으로써 표면저항, 정전기감쇄도 및 표면강도가 매우 향상되어 내구성 및 안정성이 우수하고 수명이 긴 음극선관을 얻을 수 있게 되는 것이다.As described above, according to the present invention, by forming a double layer consisting of a conductive layer and a conductive film protective layer on the outer surface of the cathode ray tube, surface resistance, electrostatic attenuation and surface strength are greatly improved, and thus durability and stability are excellent. Long life cathode ray tube can be obtained.
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KR1019890012977A KR920001836B1 (en) | 1989-09-08 | 1989-09-08 | Cathode ray tube |
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KR1019890012977A KR920001836B1 (en) | 1989-09-08 | 1989-09-08 | Cathode ray tube |
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KR920001836B1 true KR920001836B1 (en) | 1992-03-05 |
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CN1112415C (en) * | 1995-05-10 | 2003-06-25 | 三星电管株式会社 | Transparent electric-conductive coating composition |
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Publication number | Priority date | Publication date | Assignee | Title |
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CN1112415C (en) * | 1995-05-10 | 2003-06-25 | 三星电管株式会社 | Transparent electric-conductive coating composition |
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