KR950001744B1 - High-brightness crt - Google Patents

High-brightness crt Download PDF

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KR950001744B1
KR950001744B1 KR1019920007289A KR920007289A KR950001744B1 KR 950001744 B1 KR950001744 B1 KR 950001744B1 KR 1019920007289 A KR1019920007289 A KR 1019920007289A KR 920007289 A KR920007289 A KR 920007289A KR 950001744 B1 KR950001744 B1 KR 950001744B1
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film
polyvinyl alcohol
weight
composition
aluminum
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KR1019920007289A
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KR930022449A (en
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김민호
임익철
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삼성전관주식회사
박경팔
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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01JELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J29/00Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
    • H01J29/86Vessels; Containers; Vacuum locks
    • H01J29/88Vessels; Containers; Vacuum locks provided with coatings on the walls thereof; Selection of materials for the coatings

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  • Formation Of Various Coating Films On Cathode Ray Tubes And Lamps (AREA)
  • Paints Or Removers (AREA)

Abstract

The filming liquor composn. of pH 6-7, for improving the luminance of the cathode ray tube is composed of an acryl emulsion, a pure water, a polyvinyl alcohol mixture of 1500-1900 polymerization degree, 0.02-0.1 wt.% of an ammonium nitrate and 0.1-5 wt.% of an ethylene glycol. The high luminance cathode ray tube is mfd. by coating red, green and blue fluorescent materials on the inner side of the panel to form a fluorescent pattern, coating the filming liquor on the fluorescent layer to make a filming film, vacuum depositing aluminium on the film, and removing the film by the heat process.

Description

필르밍액 조성물 및 이를 사용하여 제조된 고휘도 음극선관Filling liquid composition and high brightness cathode ray tube manufactured using the same

제1도는 통상적인 칼라음극선관의 스크린막 제조공정을 설명하기 위한 도면이고,1 is a view for explaining a screen film manufacturing process of a conventional color cathode ray tube,

제2도는 폴리비닐알콜의 중합도에 따른 알루미늄 증착막의 광반사율을 나타내는 그래프이다.2 is a graph showing the light reflectance of the aluminum deposited film according to the degree of polymerization of polyvinyl alcohol.

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

1 : 패널 2 : 형광체층1 panel 2 phosphor layer

3 : 필르밍막 4 : 알루미늄 증착막3: film film 4: aluminum vapor deposition film

본 발명은 필르밍액 조성물 및 이를 사용하여 제조된 음극선관에 관한 것으로서, 특히 알루미늄 증착막의 광반사 효율을 증가시킴으로써 휘도가 향상된 음극선관을 제공해주는 필르밍액 조성물 및 이를 사용하여 제조된 음극선관에 관한 것이다.The present invention relates to a filming composition and a cathode ray tube manufactured using the same, and more particularly to a filming composition and a cathode ray tube manufactured using the same to provide a cathode ray tube with improved brightness by increasing the light reflection efficiency of the aluminum deposition film. .

통상적인 음극선관의 스크린막 제조방법을 칼라음극선관을 예로 하여 제1도를 참고로 설명하기로 한다. 먼저 패널(1)의 내면에 감광성 내식막을 도포하고 경화시킨 다음 그 상부에 적색, 녹색 및 청색발광 형광체 슬러리를 각각 도포하고 섀도우마스크를 사용하여 일정 모양의 각색 형광체 패턴(2)을 형성한다. 형광체층(2)의 상부에는 평활한 알루미늄막(4)이 형광체층(2)과 일정간격으로 분리되게 설치되는데 이를 제조하기 위해서는 먼저, 형광체층(2)의 상부에 유기물질이 주성분인 필르밍막(3)을 형성하고 그 상부에 알루미늄을 증착하여 알루미늄막(4)을 제조한 다음 일정 온도로 가열함으로써 유기필름막을 분해 제거하는 방법을 사용하고 있다. 필르밍막의 1차적인 목적은 표면에 평탄하지 못한 형광체층의 상부를 평탄하게 함으로써 이후 도포, 형성되는 알루미늄막의 요철현상을 완화시키고, 형광면의 구멍뚫림 등으로 형성된 구멍틈 사이로 알루미늄이 침투되어 들어가는 현상을 방지해 주면서, 형광체층과 알루미늄막을 일정한 간격으로 분리시킴으로써 알루미늄 증착막의 거울면 반사효과를 향상시키는 것이다. 결론적으로 이후 얻어지는 음극선관의 휘도를 향상시켜주는 것이다.A conventional method for manufacturing a screen film of a cathode ray tube will be described with reference to FIG. 1 by using a color cathode ray tube as an example. First, the photoresist is applied to the inner surface of the panel 1 and cured, and then red, green, and blue light emitting phosphor slurries are respectively applied on the upper surface of the panel 1, and a colored phosphor pattern 2 having a predetermined shape is formed using a shadow mask. On top of the phosphor layer 2, a smooth aluminum film 4 is installed to be separated from the phosphor layer 2 at regular intervals. To manufacture this, first, a film of a film in which an organic material is a main component on the phosphor layer 2 is formed. (3) is formed and the aluminum film 4 is formed by depositing aluminum thereon, and then the organic film film is decomposed and removed by heating to a predetermined temperature. The primary purpose of the film is to flatten the surface of the phosphor layer, which is not flat, to alleviate the unevenness of the aluminum film that is subsequently applied and formed, and to penetrate the aluminum into the gap formed by the hole of the fluorescent surface. While preventing, by separating the phosphor layer and the aluminum film at regular intervals to improve the mirror surface reflection effect of the aluminum deposition film. In conclusion, the brightness of the cathode ray tube obtained afterwards is improved.

그런데 상기한 바와 같이 중간층인 필르망막의 형성으로 얻게되는 여러 가지 잇점에도 불구하고 이 유기 필르밍막은 그 분해, 제거에 수반되는 몇 가지 문제점이 있다. 즉, 가열시 발생되는 유기가스의 영향을 알루미늄 증착막이 부풀어오르는 현상이 나타나는 것이다. 그 결과, 알루미늄이 형광면에서 분리되어 전극부에 부착됨으로 인하여 음극선관 내전압이 저하된다든지 알루미늄 증착막이 벗겨진 부분은 상대적으로 발광휘도가 낮아 검게 보이는 결함이 발생된다. 이러한 문제를 해결하기 위하여 종래에는 필르밍액의 조성물중에 옥살산 암모늄, 붕산에스테르, 과산화수소수 등을 선택적으로 첨가함으로써, 제조되는 필르밍막에 갈라진 틈을 생기게 하여 가스의 방출구 역할을 하도록 하였다. 그리고 필르밍액의 주성분인 아크릴계 에멀젼과 형광면과의 가교제 역할을 하는 폴리비닐알콜을 사용함에 있어서, 필르밍막의 접착력을 높이기 위하여 중합도가 1900이상의 고중합도 폴리비닐알콜을 사용하였다. 그런데 이와 같은 방법에 따라 스크린막을 제거하게 되면 필르밍막의 평활성이 나쁘고 알루미늄 증착막이 갈라지기 때문에 알루미늄 층착막의 광반사율이 낮아지게 되어 상대적으로 형광면의 발광휘도가 낮아지는 요인이 된다.However, in spite of various advantages obtained from the formation of the interlayer filament film as described above, the organic film has some problems associated with its decomposition and removal. That is, the phenomenon in which the aluminum vapor deposition film swells under the influence of the organic gas generated at the time of heating appears. As a result, due to the separation of aluminum from the fluorescent surface and the adhesion to the electrode portion, the cathode-ray tube withstand voltage is lowered or the portion where the aluminum deposition film is peeled off has a relatively low luminance, resulting in a defect that appears black. In order to solve such a problem, conventionally, ammonium oxalate, boric acid ester, hydrogen peroxide solution, etc. are selectively added to the composition of the film solution, so that cracks are formed in the film to be produced, thereby acting as a gas outlet. In addition, in using polyvinyl alcohol serving as a crosslinking agent between the acrylic emulsion and the fluorescent surface, which are the main components of the filming solution, a high degree of polymerization of polyvinyl alcohol having a polymerization degree of 1900 or more was used to increase the adhesion of the film. However, when the screen film is removed according to the above method, the film film is poor in smoothness and the aluminum deposition film is cracked, so that the light reflectance of the aluminum layered film is lowered, resulting in a lower luminance of the fluorescent surface.

본 발명의 목적은 상기한 문제점을 감안하여 필르밍액 조성물을 제조함에 있어서, 조성물의 성분을 변화시켜 분해되는 유기물질의 제거를 용이하게 함으로써 알루미늄막이 부풀어오르거나 떨어지는 현상을 방지하여 알루미늄막의 광반사 효율을 향상시켜주는 필르밍액 조성물을 제공하는 것이다.SUMMARY OF THE INVENTION In view of the above problems, an object of the present invention is to prepare a peeling liquid composition by changing the composition of the composition to facilitate removal of decomposed organic substances, thereby preventing the aluminum film from swelling or falling, thereby preventing light reflection efficiency of the aluminum film. It is to provide a peeling liquid composition that improves.

본 발명의 다른 목적은 상기한 필르밍액 조성물을 사용하여 제조함으로써 휘도가 크게 향상된 음극선관을 제공하는 것이다.Another object of the present invention is to provide a cathode ray tube with a greatly improved brightness by manufacturing using the above-mentioned peeling liquid composition.

상기 목적을 달성하기 위하여 본 발명에서는 아크릴에멀젼, 순수, 폴리비닐알콜을 주성분으로 하는 필르밍액 조성물에 있어서, 상기 폴리비닐알콜이 중합도 1500인 것과 1900인 것의 혼합물이며, 상기 필르밍액 조성물이 0.02 내지 0,1중량%의 질산암모늄 및 0,1 내지 5중량%의 에틸렌 글리콜을 더 포함하는 것을 특징으로 하는 필르밍액 조성물을 제공한다.In order to achieve the above object, in the present invention, in the film solution composition containing acrylic emulsion, pure water, and polyvinyl alcohol as a main component, the polyvinyl alcohol has a polymerization degree of 1500 and a mixture of 1900, and the film solution composition contains 0.02 to 0. , 1% by weight of ammonium nitrate and 0,1 to 5% by weight of ethylene glycol further provides a blooming liquid composition.

특히 상기 폴리비닐알콜의 첨가량은 필르밍액 조성물 총량을 기준으로 하여 고형분 함량으로 0.45 내지 0.78중량%인 것이 바람직하며, 상기 중합도 1500 및 1900인 폴리비닐알콜의 혼합량은 15 : 85 내지 45 : 55인 것이 바람직하다. 그리고 상기 필르밍액의 pH는 6 내지 7로 맞춰주는 것이 알맞다.In particular, the amount of the polyvinyl alcohol added is preferably 0.45 to 0.78% by weight, based on the total amount of the peeling liquid composition, and the mixed amount of the polyvinyl alcohol having the polymerization degrees 1500 and 1900 is 15:85 to 45:55. desirable. And it is appropriate to adjust the pH of the peeling liquid to 6 to 7.

본 발명의 필르밍액 조성물은 주성분으로 아크릴에멀젼 및 중합도 1500 및 1900인 폴리비닐알콜의 혼합물을 사용하며 에틸렌글리콜과 질산 암모늄을 동시에 사용한 것으로서 특히, 종래의 필르밍액 조성물에 포함되던 옥살산 암모늄. 붕산에스테르 또는 과산화수소가 포함되지 않고 그 대신에 질산암모늄을 첨가하여 이것이 유기물질의 분해, 제거시 가스의 방출구 역할을 하게 함으로써, 알루미늄 증착막의 갈라짐을 방지하고 아울러 막이 거칠어지거나 부풀어오르는 현상을 방지하여 알루미늄 증착막의 광반사 효율을 향상시킴으로써 음극선관의 발광휘도를 향상시키고 있다.The blooming liquid composition of the present invention uses a mixture of an acrylic emulsion and a polyvinyl alcohol having a polymerization degree of 1500 and 1900 as main components, and uses ethylene glycol and ammonium nitrate at the same time. In particular, ammonium oxalate contained in the conventional liquid film liquid composition. It does not contain boric acid ester or hydrogen peroxide but instead adds ammonium nitrate, which acts as a gas outlet when decomposing and removing organic materials, thereby preventing cracks in the aluminum deposition film and preventing the film from becoming rough or swollen. The light emission luminance of the cathode ray tube is improved by improving the light reflection efficiency of the aluminum vapor deposition film.

본 발명의 필르밍액 조성물을 사용하여 음극선관을 제조하는 방법은 다음과 같다.The method of manufacturing a cathode ray tube using the peeling liquid composition of this invention is as follows.

필르밍액의 주성분은 아크릴에멀젼은 실질적으로 얻어지는 필르밍막의 막두께를 결정하는 성분이다. 이 아크릴에멀젼을 순수와 혼합하여 교반하는 중에 중합도 1500인 폴리비닐알콜 3% 용액과 중합도 1900인 폴리비닐알콜 3% 용액을 일정비율로 첨가한다. 여기에 필르밍막의 평탄도를 향상시키기 위해 에틸렌글리콜을 첨가하고 알루미늄 층착막의 부풀음을 방지하기 위해 2% 질산암모늄 수용액을 첨가한 다음 액의 pH를 6 내지로 조정하여 24시간동안 교반한다.The main component of the film solution is an acryl emulsion, which is a component that determines the film thickness of the film obtained. While stirring and mixing this acryl emulsion with pure water, the polyvinyl alcohol 3% solution of the polymerization degree 1500 and the polyvinyl alcohol 3% solution of the polymerization degree 1900 are added by fixed ratio. Ethylene glycol was added to improve the flatness of the film, and 2% aqueous ammonium nitrate solution was added to prevent swelling of the aluminum layer. Then, the pH of the liquid was adjusted to 6 and stirred for 24 hours.

통상의 슬러리법에 따라 패널의 내면에 적색, 녹색, 청색발광의 형광체를 소정의 모양으로 도포하여 형광체 패턴을 형성한다. 형광체층의 상부에 상기에서 얻은 필르밍액 조성물을 도포하여 필르밍막을 제조한다. 필르밍막의 상부에 알루미늄을 진공증착하고 이후 가열공정을 통하여 필르밍막을 분해, 제거하면 고휘도의 음극선관을 제조할 수 있게 된다.According to a conventional slurry method, phosphors of red, green and blue light emission are coated on the inner surface of the panel in a predetermined shape to form phosphor patterns. The peeling film composition was applied to the upper portion of the phosphor layer to prepare a film. By vacuum depositing aluminum on top of the film and then decomposing and removing the film through a heating process, a high-brightness cathode ray tube can be manufactured.

이하 본 발명의 구체적인 실시예를 상세히 설명하기로 한다.Hereinafter, specific embodiments of the present invention will be described in detail.

[실시예1]Example 1

아크릴에멀젼 30 중량%30% by weight of acrylic emulsion

3%폴리비닐알콜(중합도 1500) 1.8 중량%3% polyvinyl alcohol (polymerization degree 1500) 1.8% by weight

3%폴리비닐알콜(중합도 1900) 16.2 중량%3% polyvinyl alcohol (polymerization degree 1900) 16.2 wt%

2% 질산암모늄 3 중량%2% ammonium nitrate 3% by weight

에틸렌글리콜 1 중량%1% by weight of ethylene glycol

순수 잔량Pure water

상기 각 성분을 혼합하여 필르밍액 조성물을 제조한다. 통상의 방법에 따라 제조된 형광체층의 상부에 상기 필르밍액 조성물을 도포하여 필르밍막을 형성하고 그 상부에 알루미늄을 진공 증착하여 알루미늄 증착막을 형성한다. 이후 가열공정을 통하여 유기물을 가열, 분해함으로써 고휘도의 음극선관을 제조한다.Each of the above components is mixed to prepare a peeling liquid composition. The peeling liquid composition is coated on the phosphor layer prepared according to a conventional method to form a filming film, and aluminum is vacuum deposited on the film to form an aluminum deposition film. Thereafter, the organic material is heated and decomposed through a heating process to manufacture a cathode ray tube of high brightness.

[실시예2-9]Example 2-9

실시예1과 동일한 방법으로 수행하되 중합도 1500인 폴리비닐알콜과 중합도 1900인 폴리비닐알콜의 혼합비를 표1과 같이 변화하여 필르밍액 조성물을 제조한다.The same method as in Example 1 was carried out, but the mixing ratio of the polyvinyl alcohol having a polymerization degree of 1500 and the polyvinyl alcohol having a polymerization degree of 1900 was changed as shown in Table 1 to prepare a peeling liquid composition.

[비교예1-2]Comparative Example 1-2

실시예1과 동일한 방법으로 수행하되 중합도 1500인 폴리비닐알콜[비교예1]은 중합도 1900인 폴리비닐알콜[비교예2]을 판독하여 사용하여 필르밍액 조성물을 제조한다.A polyvinyl alcohol [Comparative Example 1] having a polymerization degree of 1500 was performed in the same manner as in Example 1, and a polyvinyl alcohol [Comparative Example 2] having a polymerization degree of 1900 was read and used to prepare a blooming liquid composition.

표1에 각 실시예 및 비교예에서 사용한 각 중합도의 폴리비닐알콜의 혼합비를 도시하였다.Table 1 shows the mixing ratio of polyvinyl alcohol of each polymerization degree used in each of Examples and Comparative Examples.

상기 각 실시예 및 비교예에서 얻어진 필르밍액 조성물을 사용하여 제조한 알루미늄 증착막의 광반사율을 제2도에 나타내었다.FIG. 2 shows the light reflectance of the aluminum deposited film prepared using the peeling liquid composition obtained in each of Examples and Comparative Examples.

중합도가 1500인 폴리비닐알콜만을 사용하였을 때 알루미늄 증착막의 광반사율은 가장 높지만 유기물질의 분해, 제거시 증착막이 다소 부푸는 현상이 나타나 바람직하지 못하였으며, 이를 방지하기 위하여 질산암모늄의 첨가량을 증가시키면 증착막의 부품은 현상은 방지할 수 있으나 알루미늄 증착막의 광반사율이 다소 떨어지는 문제점이 발생된다. 그리고 중합도가 1900인 폴리비닐알콜만을 사용하였을 때는 종래의 방법에 따라 제조한 증착막과 동일한 광반사율을 나타내었다.When only polyvinyl alcohol having a degree of polymerization of 1500 was used, the light reflectance of the aluminum deposited film was the highest, but when the organic material was decomposed or removed, the deposited film was slightly swollen. This was not preferable. The development of the deposition film components can be prevented, but there is a problem that the light reflectance of the aluminum deposition film is somewhat reduced. When only polyvinyl alcohol having a degree of polymerization of 1900 was used, the same light reflectance as that of the deposited film prepared according to the conventional method was shown.

알루미늄 증착막의 부풀음을 방지하면서 광반사율을 높이기 위해서는 중합도 1500 및 1900인 폴리비닐알콜의 혼합량이 15 : 85 내지 45 : 55인 것이 가장 이상적이다. 그리고 혼합물의 첨가량은 고형분의 함량을 기준으로 할 때 필르밍액 조성물 총량을 기준하여 0.45 내지 0.78중량%인 것이 바람직한데, 이는 그 첨가량이 0.45중량% 미만이면 알루미늄 증착막의 두께가 1000Å이하로 떨어지기 때문에 알루미늄 증착막에 의한 거울면 반사 효과가 떨어지며, 그 첨가량이 0.78 중량%를 초과하게되면 알루미늄 증착막의 부풀음 현상이 발생되기 때문이다.In order to increase the light reflectivity while preventing swelling of the aluminum vapor deposition film, it is most ideal that the mixing amount of polyvinyl alcohol having a polymerization degree of 1500 and 1900 is from 15:85 to 45:55. In addition, the amount of the mixture is preferably 0.45 to 0.78% by weight based on the total amount of the peeling liquid composition, based on the content of the solid content, since the thickness of the aluminum deposited film falls below 1000 kPa when the amount is less than 0.45% by weight. This is because the mirror reflection effect by the aluminum vapor deposition film is inferior, and when the addition amount exceeds 0.78% by weight, the swelling phenomenon of the aluminum vapor deposition film occurs.

질산암모늄은 알루미늄 진공증착시 막에 기공을 형성하여 유기물질의 분해, 제거시 가스 방출구의 역할을 하며 그 첨가량은 고형분 함량을 기준으로하여 필르밍액 조성물 총량에 대하여 0.02 내지 0.1% 중량%가 가장 바람직하다. 이는 그 첨가량이 0.02중량% 미만이면 기공형성 능력이 부족하여 알루미늄 증착막의 부풀음 현상이 나타나며, 0.1중량%를 초과하게되면 알루미늄 증착막이 거칠어지기 때문에 광반사율이 떨어지기 때문이다.Ammonium nitrate forms pores in the membrane during vacuum deposition of aluminum, which acts as a gas outlet when decomposing and removing organic substances. The amount of addition is most preferably 0.02 to 0.1% by weight based on the solids content Do. This is because if the added amount is less than 0.02% by weight, the pore-forming ability is insufficient, resulting in swelling of the aluminum deposited film. If the amount is more than 0.1% by weight, the light reflectance is decreased because the aluminum deposited film is roughened.

에틸렌글리콜은 필르밍막 형성시 막이 과건조되는 현상을 방지하는 동시에 폴리비닐알콜과 함께 작용하여 필르밍막의 평탄도를 향상시키기 때문에 알루미늄막의 광반사율을 증가시키는 역할을 하게된다. 에틸렌글리콜의 첨가량은 필르밍액 조성물 총량에 대하여 0.1 내지 5중량%인 것이 가장 이상적으로서, 0.1중량% 미만일 때는 그 효과를 기대하기가 어렵고, 5중량%를 초과하게되면 필르밍액의 점도가 향상되어 필르밍액의 도포시 막 얼룩이 발생하는 문제가 있다. 이상과 같이 본 발명의 필르밍액 조성물을 사용하여 음극선관을 제조하게되면 평탄하고 갈라짐이 없는 알루미늄 증착막의 제조가 가능하며 이로 인한 광반사율 향상으로 형광면이 발광휘도가 약 6 내지 9% 향상된 음극선관을 얻을 수 있게된다.Ethylene glycol prevents the film from being overdried at the time of forming the film and at the same time acts together with polyvinyl alcohol to improve the flatness of the film, thereby increasing the light reflectance of the aluminum film. Ideally, the amount of ethylene glycol added is 0.1 to 5% by weight relative to the total amount of the composition of the liquid solution, and when the amount is less than 0.1% by weight, it is difficult to expect the effect. There is a problem that the film stain occurs when the application of the liquid. When the cathode ray tube is manufactured using the peeling liquid composition of the present invention as described above, it is possible to manufacture a flat and crack-free aluminum deposition film, and thus the cathode ray tube having an improved luminescence brightness of about 6 to 9% by the light reflectivity is improved. You will get

Claims (5)

아크릴에멀젼, 순수 및 폴리비닐알콜을 주성분으로 하는 필르밍액 조성물에 있어서, 상기 폴리비닐알콜이 중합도 1500인 것과 1900인 것의 혼합물이며, 상기 필르밍액 조성물이 0.02 내지 0.1중량%의 질산암모늄 및 0.1 내지 5중량%의 에틸렌글리콜을 더 포함하는 것을 특징으로 하는 필르밍액 조성물.A filming composition comprising acryl emulsion, pure water and polyvinyl alcohol as a main component, wherein the polyvinyl alcohol is a mixture having a degree of polymerization of 1500 and 1900, and the film composition contains 0.02 to 0.1% by weight of ammonium nitrate and 0.1 to 5% Filling liquid composition, characterized in that it further comprises by weight of ethylene glycol. 제1항에 있어서, 상기 폴리비닐알콜의 첨가량이 필르밍액 조성물 총량을 기준으로 하여 고형분 함량으로 0.45 내지 0.78중량%인 것을 특징으로 하는 필르밍액 조성물.The method of claim 1, wherein the amount of the polyvinyl alcohol, based on the total amount of the peeling liquid composition, the amount of solid content 0.45 to 0.78% by weight of the blooming liquid composition. 제1항 또는 2항에 있어서, 상기 중합도 1500 및 1900인 폴리비닐알콜의 혼합량이 15 :85 내지 45 :55인 것을 특징으로 하는 필르밍액 조성물.The filming composition according to claim 1 or 2, wherein the amount of the polyvinyl alcohol having the polymerization degrees 1500 and 1900 is from 15:85 to 45:55. 제1항에 있어서, 상기 필르밍액의 pH가 6 내지 7인 것을 특징으로 하는 필르밍액 조성물.According to claim 1, wherein the pH of the peeling liquid is a peeling liquid composition, characterized in that. 패널의 내면, 소정 패턴으로 형성된 형광체층의 상부에, 아크릴에멀젼, 순수, 중합도 1500 및 1900인 폴리비닐알콜의 혼합물, 필르밍액 조성물 총량에 대해 0.02 내지 0.1중량%의 질산암모늄 및 0.1 내지 5중량%의 에틸렌글리콜을 포함하여 이루어지는 필르밍액 조성물을 도포하여 평탄한 필르밍막을 제조하고 그 상부에 알루미늄을 진공증착하여 제조함으로 평탄한 알루미늄막을 구비하는 고휘도 음극선관.The inner surface of the panel, on top of the phosphor layer formed in a predetermined pattern, a mixture of acrylic emulsion, pure water, polyvinyl alcohol having a degree of polymerization of 1500 and 1900, 0.02 to 0.1% by weight of ammonium nitrate and 0.1 to 5% by weight relative to the total amount of the film solution composition A high-brightness cathode ray tube having a flat aluminum film by applying a filming liquid composition comprising ethylene glycol, to prepare a flat film film, and vacuum-depositing aluminum on the top thereof.
KR1019920007289A 1992-04-29 1992-04-29 High-brightness crt KR950001744B1 (en)

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