KR100240493B1 - Color cathode ray tube - Google Patents

Color cathode ray tube Download PDF

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Publication number
KR100240493B1
KR100240493B1 KR1019960008974A KR19960008974A KR100240493B1 KR 100240493 B1 KR100240493 B1 KR 100240493B1 KR 1019960008974 A KR1019960008974 A KR 1019960008974A KR 19960008974 A KR19960008974 A KR 19960008974A KR 100240493 B1 KR100240493 B1 KR 100240493B1
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South Korea
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color
phosphors
fluorescent surface
diffusion layer
phosphor
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KR1019960008974A
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Korean (ko)
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KR970067508A (en
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박상현
천병욱
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김영남
오리온전기주식회사
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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
    • H01J29/02Electrodes; Screens; Mounting, supporting, spacing or insulating thereof
    • H01J29/10Screens on or from which an image or pattern is formed, picked up, converted or stored
    • H01J29/18Luminescent screens
    • H01J29/28Luminescent screens with protective, conductive or reflective layers
    • 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
    • H01J29/02Electrodes; Screens; Mounting, supporting, spacing or insulating thereof
    • H01J29/10Screens on or from which an image or pattern is formed, picked up, converted or stored
    • H01J29/18Luminescent screens
    • H01J29/30Luminescent screens with luminescent material discontinuously arranged, e.g. in dots, in lines
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01JELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2329/00Electron emission display panels, e.g. field emission display panels
    • H01J2329/18Luminescent screens
    • H01J2329/28Luminescent screens with protective, conductive or reflective layers

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  • Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)

Abstract

본 발명은 칼라브라운관의 신규한 형광면을 개시한다.The present invention discloses a novel fluorescent surface of a color brown tube.

종래에는 Al막에서 반사되는 빛의 상당량이 블랙매트릭스에 흡수되어 형광면의 발광휘도가 낮았다.Conventionally, a considerable amount of light reflected from the Al film is absorbed by the black matrix, so that the luminance of the fluorescent surface is low.

본 발명에서는 각 형광체의 전면에 투명재질로 된 확산층을 형성하여, 색재현 특성과 시야각을 향상시키고, 발광휘도의 향상도 가능하도록 하였다.In the present invention, a diffusion layer made of a transparent material is formed on the entire surface of each phosphor to improve color reproduction characteristics and viewing angles, and to improve emission luminance.

Description

칼라브라운관의 형광면Fluorescent surface of color CRT

제1도는 일반적인 칼라형광면의 구성을 보이는 일부 확대 단면도.1 is a partially enlarged cross-sectional view showing the configuration of a general color fluorescent surface.

제2도는 칼라 필터를 채용한 종래의 형광면의 구성을 보이는 확대 단면도.2 is an enlarged cross-sectional view showing the configuration of a conventional fluorescent surface employing a color filter.

제3도 내지 제5도는 본 발명에 따른 형광면의 여러가지 구성을 보이는 확대 단면도.3 to 5 are enlarged cross-sectional views showing various configurations of the fluorescent screen according to the present invention.

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

P : 패널(panel) F : 페이스(face)P: panel F: face

S : 스커어트(skirt) R, G, B : 형광체(phosphor)S: Skirt R, G, B: Phosphor

BM : 블랙매트릭스(black matrix)BM: black matrix

Al : Al막 I : 중간막Al: Al film I: interlayer

L : 칼라필터(color filter) D : 확산층(擴散層)L: color filter D: diffusion layer

본 발명은 칼라브라운관에 관한 것으로, 특히 그 형광면에 관한 것이다.The present invention relates to a color brown tube, and more particularly to a fluorescent surface thereof.

칼라브라운관은 R, G, B 각 형광체를 도트(dot)나 스트라이프(stripe)등의 소정패턴으로 배열하고, 섀도우마스크(shadow mask)등의 색선별수단을 통해 각 형광체를 선택적으로 발광시킴으로써 칼라화상을 구현하는 화상표시장치이다.The color CRT arranges R, G, and B phosphors in a predetermined pattern such as a dot or a stripe, and selectively emits the phosphors through color sorting means such as a shadow mask. It is an image display device for implementing.

칼라브라운관의 형광면의 구성은 대략 제1도에 도시된 바와 같은 바, 패널(panel; P)은 페이스(face; F)와 이를 둘러싸는 스커어트(stirt; S)로 구성되고, 페이스(F)의 내면에 형광면이 형성된다.The configuration of the fluorescent surface of the color-brown tube is roughly as shown in FIG. 1. The panel (P) is composed of a face (F) and a skirt (S) surrounding it, and the face (F). A fluorescent surface is formed on the inner surface of the.

형광면은 흑연등의 도전성 흑색막으로 된 블랙매트릭스(black matrix; BM)를 패터닝(patterning)하여 형성된 창(window)에 R, G, B 각 형광체를 순차적으로 도포 및 패터닝하여 블랙매트릭스(BM)의 각 창에 교호적으로 노출시키게 된다. 블랙매트릭스(BM)의 외측은 스커어트(S)를 따라 연장되어 도시되지 않은 섀도우마스크의 프레임이 결합 및 전기적 접속될 스터드핀(stud pin; T)에 핀다그(pin dag; G)에 의해 전기적 접속된다.The fluorescent surface is formed by patterning a black matrix (BM) made of a conductive black film such as graphite, and sequentially applying and patterning phosphors of R, G, and B to form a black matrix (BM). Each window is exposed alternately. The outside of the black matrix BM extends along the skirt S so that the frame of the shadow mask, not shown, is electrically connected by a pin dag G to the stud pin T to which the frame of the shadow mask, not shown, is coupled and electrically connected. Connected.

한편 형광면의 배면에는 메탈백(metal back)을 구성하기 위한 Al막(Al0이 형성되는데, 불균일한 형광체(R,G,B)상에 Al막(Al)을 그대로 형성하여서는 균일한 경면(鏡面)을 얻을 수 없으므로 열분해성 유기수지로 된 필르밍(filming)막 또는 중간막(I)을 형성하여 중간막(I)상에 Al막(Al)을 형성한 뒤, 소성(燒成)에 의해 중간막(I)을 제거하게 된다.On the other hand, an Al film (Al0) is formed on the back surface of the fluorescent surface to form a metal back, and the uniform Al surface (Al) is formed on the non-uniform phosphors R, G, and B as it is. Since the film cannot be obtained, a filming film or an interlayer (I) made of a thermally decomposable organic resin is formed to form an Al film (Al) on the interlayer (I), and then the interlayer (I) is formed by firing. ) Will be removed.

이러한 형광면에 있어서, 각 형광체(R,G,B)는 전자총에서 발사된 전자빔에 의해 선택적으로 발광하여 가시광선을 발생시키고, Al막(Al)은 이 가시광선을 페이스(F) 전면으로 반사하여 휘도를 높이는 동시에 형광면의 부분적 소손(燒損)을 방지하고 유리전자를 배출시키는 역할을 한다. 한편 블랙매트릭스(BM)는 각 형광체(R,G,B)를 검은 배경색으로 분리하여 화상의 컨트라스트(contrast)를 증가시키는 역할을 한다.In such a fluorescent surface, each of the phosphors R, G, and B selectively emits light by an electron beam emitted from an electron gun to generate visible light, and the Al film Al reflects this visible light to the front face F. At the same time, it increases luminance and prevents partial burnout of the fluorescent surface and emits free electrons. Meanwhile, the black matrix BM separates each phosphor R, G, and B into a black background color to increase contrast of an image.

그런데 이와 같은 종래의 형광면에 있어서는 블랙매트릭스(BM)가 형광체 (R,G,B)를 전면에서 분리 차폐할 뿐아니라 Al막(Al)에서 반사된 가시광선의 상당량을 흡수하므로, 전자빔에 의해 여기된 형광체(R,G,B)의 전 표면적에서 가시광선이 발생된다고 하더라도 블랙매트릭스(BM)로 차폐된 부분에서 발생된 가시광선의 상당량이 직접적으로 페이스(F)로 투영되지 못하고 Al막(Al)을 통한 반사에 의해 블랙매트릭스(BM)에 흡수되어 버리게 된다.However, in the conventional fluorescent surface, the black matrix BM not only separates and shields the phosphors R, G, and B from the front surface, but also absorbs a considerable amount of visible light reflected from the Al film Al, thereby being excited by the electron beam. Although visible light is generated in the entire surface area of the phosphors R, G, and B, a considerable amount of visible light generated at the portion shielded with the black matrix BM is not directly projected to the face F, and the Al film Al The reflection is absorbed by the black matrix BM.

이에 따라 종래의 칼라 형광면은 화면 휘도(輝度)가 그다지 높지 못할 뿐아니라, 인접 형광체에서 발생된 전자나 가시광선이 Al막(Al)을 통해 혼입되어 간섭을 일으키게 되므로 색순도(color purity)도 저하되는 문제가 있었다.Accordingly, the conventional color phosphor has not only a high screen brightness, but also an electron or visible light generated from adjacent phosphors is mixed through the Al film to cause interference, thereby degrading color purity. There was a problem.

한편 R,G,B 각 발광색을 나타내는 형광체도 매우 다양한 종류의 것들이 선택되고 있으나 각 형광체(R,G,B)의 특성이나 발광강도가 균일하지는 못하다. 특히 R 형광체의 경우는 여타 형광체보다 수배이상 고가임에도 그 수명이 짧고 B 형광체는 그 발광강도가 특히 낮은 문제가 있었다.On the other hand, the phosphors exhibiting the emission colors of R, G, and B are selected from a wide variety, but the characteristics and emission intensity of each phosphor (R, G, B) are not uniform. In particular, the R phosphor has a problem that its life is short even though it is several times more expensive than other phosphors, and that the B phosphor has a particularly low emission intensity.

이러한 발광강도의 차이는 주로 각 전자빔의 강도에 의해 보상되는 바, 일부 형광체를 계속 강한 전자빔으로 발광시키면 그 형광체만이 조기에 열화(劣化)되어 화상이 화이트 밸러스(white balance)가 사용에 따라 급격히 저하되는 문제가 발생된다. 이러한 문제는 장기간 사용한 칼라브라운관이 황색을 나타내어 정확한 색재현이 불가능한 현상으로 관찰된다.This difference in luminous intensity is mainly compensated by the intensity of each electron beam. If some of the phosphors continue to emit light with a strong electron beam, only the phosphors deteriorate prematurely and the image suddenly changes as the white balance is used. The problem of deterioration arises. This problem is observed as a phenomenon in which the color tube used for a long time is yellow, so that accurate color reproduction is impossible.

이러한 문제를 해결하기 위한 방안중의 하나로 제2도에 도시된 바와 같이 칼라필터(L)를 구비한 형광면이 출현하였다.As one of the ways to solve this problem, a fluorescent surface with a color filter (L) has appeared as shown in FIG.

이것은 R, G, B 각 색의 염료(pigment)를 포함하는 투명층으로 된 칼라필터 (L)를 각 형광체(R,G,B)의 전면에 배치하여 특히 색순도와 색재현성등을 향상시키고자 한 구성이다. 이러한 칼라필터(L)는 또한 각 형광체(R,G,B)의 발광휘도에 치이가 나는 경우 차광(遮光) 입자등의 혼합으로 이를 보상함으로써 회이트밸런스의 달성도 용이하게 하고 있다.In order to improve color purity and color reproducibility, a color filter (L) made of a transparent layer containing dyes of R, G, and B colors is disposed in front of each phosphor (R, G, B). Configuration. Such a color filter L also facilitates the achievement of the white balance by compensating for the mixture of light blocking particles and the like when the luminance of the phosphors R, G, and B is distressed.

그러나 이와 같은 형광면 역시 블랙메트릭스(BM)에 의해 칼라필터(L)와 형광체(R,G,B)가 차폐되므로 발광휘도와 색재현 특성들이 그다지 뛰어나지 못한 문제가 있었다.However, such a fluorescent surface is also shielded by the color filter (L) and the phosphors (R, G, B) by the black matrix (BM), there was a problem that the luminous luminance and color reproduction characteristics were not very good.

이러한 종래의 여러가지 문제점을 감안하여 본 발명의 목적은 발광휘도와 색재현 특성이 우수한 칼라브라운관을 제공하는 것을 목적으로 한다.In view of the various problems of the related art, an object of the present invention is to provide a color brown tube having excellent luminous luminance and color reproduction characteristics.

상술한 목적의 달성을 위해 본 발명에 의한 칼라브라운관의 형광면은 각 형광체의 전면에 투명재질로 된 확산층(擴散層)이 형성되는 것을 특징으로 한다.In order to achieve the above object, the fluorescent surface of the color brown tube according to the present invention is characterized in that a diffusion layer made of a transparent material is formed on the entire surface of each phosphor.

이러한 확산층은 형광체에서 발생된 가시광선을 그 내부에서 확산시켜 발광휘도와 색재현 특성을 향상시키는 동시에 시야각(視野角)을 확대시켜 주게 된다.Such a diffusion layer diffuses visible light generated from the phosphor in the inside thereof, thereby improving emission luminance and color reproduction characteristics and at the same time expanding the viewing angle.

이와 같은 본 발명의 구체적인 특징과 이점들은 첨부된 도면을 참조한 이하의 비람직한 실시예들의 설명으로 더욱 명확해질 것이다.Such specific features and advantages of the present invention will become more apparent from the following description of the preferred embodiments with reference to the accompanying drawings.

제3도에서, 본 발명에 의한 형광면은 블랙매트릭스(BM)의 사이에 먼저 확산층(D)을 형성하고 그 상부에 각 형광체(R,G,B)를 형성하여, 각 형광체(R,G,B)의 전면에 확산층(D)이 형성되어 있다.In FIG. 3, the phosphor surface according to the present invention first forms a diffusion layer D between the black matrix BM, and forms phosphors R, G, and B on top of each other. A diffusion layer (D) is formed on the entire surface of B).

확산층(D)은 Si등 내열성의 투명재질로 형성되는데, 이와 같이 각 형광체(R,G,B)별로 분리된 확산층(D)도 블랙매트릭스(BM)상에 형성되므로 사진식각법(photo lithography)등의 패터닝(patterning)없이도 전면(全面) 인쇄등의 방법으로 도시된 바와 같은 구성이 가능하게 된다.The diffusion layer (D) is formed of a heat-resistant transparent material such as Si. As such, the diffusion layer (D) separated for each phosphor (R, G, B) is also formed on the black matrix (BM), so that photo lithography is performed. The configuration as shown by a method such as full surface printing is possible without patterning such as.

이러한 구성에 의하면 형광체(R,G,B)에서 발생된 가시광선이 확산층(D)을 통과하여 확산되므로 색재현 특성이 우수해지고 시야각이 넓어지게 된다.According to such a configuration, since visible light generated in the phosphors R, G, and B diffuses through the diffusion layer D, color reproduction characteristics are excellent and a viewing angle is widened.

한편 이러한 확산층(D)은 제4도 및 제5도에 도시된 바와 같이 각 형광체 (R,G,B)에 대해 연속되도록 구성될 수 있는데, 제4도의 구성은 확산층(D)의 재질을 분사 또는 증착등으로 도포한 경우이며 제5도의 구성은 회전(spin) 도포나 후막(厚膜)으로 인쇄한 경우 구현될 수 있는 구성이다.On the other hand, the diffusion layer (D) may be configured to be continuous for each phosphor (R, G, B) as shown in Figures 4 and 5, the configuration of Figure 4 sprays the material of the diffusion layer (D) Alternatively, the case of coating by vapor deposition, etc., and the configuration of FIG. 5 is a structure that can be implemented when printing by spin coating or thick film.

이러한 구성에 의하면 각 형광체(R,G,B)가 블랙매트릭스(BM)상에 직접 접촉하지 않고 그 사이에 확산층(D)이 개재된다.According to such a structure, each phosphor R, G, and B does not directly contact on the black matrix BM, but the diffusion layer D is interposed therebetween.

이에 따라 형광체(R,G,B)에서 발생되어 블랙매트릭스(BM)를 향하는 빛이나 Al막(Al)에서 반사되어 블랙매트릭스(BM)측으로 입사되는 빛은 확산층(D)의 층경계에서 반사되어 다시 확산층(D) 내부로 입사되고, 이에 따라 페이스(F) 전면으로 방출되는 광량이 커지게 되어 발광휘도가 향상된다.Accordingly, light generated from the phosphors R, G, and B and reflected toward the black matrix BM, or reflected from the Al film Al and incident to the black matrix BM side is reflected at the layer boundary of the diffusion layer D. The light is incident again into the diffusion layer D, thereby increasing the amount of light emitted toward the front of the face F, thereby improving the luminance.

즉 제4도 및 제5도에서와 같이 확산층(D)을 각 형광체(R,G,B)에 대해 연속적으로 형성하는 경우에는, 제3도의 실시예에서와 같은 색재현 특성과 시야각의 확대뿐아니라 발광휘도의 향상도 달성된다.That is, when the diffusion layer D is continuously formed with respect to each of the phosphors R, G, and B as shown in FIGS. 4 and 5, only the color reproduction characteristics and the enlargement of the viewing angle as in the embodiment of FIG. In addition, improvement of the luminance of light emission is also achieved.

이에 따라 본 발명은 고화질, 고휘도의 칼라브라운관을 구현하는데 큰 효과가 있다.Accordingly, the present invention has a great effect in realizing a high quality, high brightness color CRT.

Claims (3)

패널의 페이스 내면에 R, G, B 각 형광체와 이들을 분리하는 블랙매트릭스를 각각 소정패턴으로 형성하여 칼라브라운관의 형광면을 형성하는 방법에 있어서, 상기 각 형광체의 전면에 투명재질로 된 확산층이 구비된는 것을 특징으로 하는 칼라브라운관의 형광면.In the method of forming a fluorescent surface of a color CRT by forming R, G and B phosphors and a black matrix separating them in a predetermined pattern on the inner surface of the panel, the transparent layer is provided on the entire surface of each phosphor. Fluorescent surface of color CRT. 제1항에 있어서, 상기 확산층이 상기 각 형광체에 대해 연속적으로 형성되는 것을 특징으로 하는 칼라브라운관의 형광면.The fluorescent surface of a color brown tube according to claim 1, wherein said diffusion layer is formed continuously with respect to said phosphors. 제1항에 있어서, 상기 확산층이 상기 각 형광체에 대해 분리되어 형성되는 것을 특징으로 하는 칼라브라운관의 형광면.The fluorescent surface of a color brown tube according to claim 1, wherein the diffusion layer is formed separately from each of the phosphors.
KR1019960008974A 1996-03-29 1996-03-29 Color cathode ray tube KR100240493B1 (en)

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