KR20030017699A - Color display device and Method of manufacturing the same - Google Patents

Color display device and Method of manufacturing the same Download PDF

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Publication number
KR20030017699A
KR20030017699A KR1020010050327A KR20010050327A KR20030017699A KR 20030017699 A KR20030017699 A KR 20030017699A KR 1020010050327 A KR1020010050327 A KR 1020010050327A KR 20010050327 A KR20010050327 A KR 20010050327A KR 20030017699 A KR20030017699 A KR 20030017699A
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South Korea
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light absorbing
panel
display device
absorbing material
color display
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KR1020010050327A
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Korean (ko)
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김태용
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엘지.필립스디스플레이(주)
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Priority to KR1020010050327A priority Critical patent/KR20030017699A/en
Publication of KR20030017699A publication Critical patent/KR20030017699A/en

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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
    • H01J29/30—Luminescent screens with luminescent material discontinuously arranged, e.g. in dots, in lines
    • H01J29/32—Luminescent screens with luminescent material discontinuously arranged, e.g. in dots, in lines with adjacent dots or lines of different luminescent material, e.g. for colour television
    • H01J29/327—Black matrix materials
    • 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
    • H01J9/227—Applying luminescent coatings with luminescent material discontinuously arranged, e.g. in dots or lines
    • H01J9/2278—Application of light absorbing material, e.g. between the luminescent areas

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
  • Formation Of Various Coating Films On Cathode Ray Tubes And Lamps (AREA)

Abstract

PURPOSE: A color display device and a method for manufacturing the same are provided to achieve improved contrast characteristics by increasing binding force between graphite and graphite particles and blackness. CONSTITUTION: A color display device comprises a light absorbing layer(110) formed at the inner surface of a panel(100), and which contains, as main component, graphite, ammonia, surface active agent, pure water and alkaline salt silicate; and red, green and blue phosphors(120) formed among the light absorbing layer. The alkaline salt silicate is SiO2 and has a content of 5 to 40 weight percent. A method for manufacturing color display device, comprises a first step of preparing a panel; a second step of depositing a photoresist solution at the inner surface of the panel and patterning the resultant structure; a third step of depositing a light absorbing material all over the inner surface of the panel; a fourth step of forming a light absorbing layer by removing the portion where photo resist patterns are formed; and a fifth step of forming red, green and blue phosphors among the light absorbing layer.

Description

칼라표시장치 및 그 제조방법{Color display device and Method of manufacturing the same}Color display device and method of manufacturing the same

본 발명은 칼라표시장치에 관한 것으로, 보다 구체적으로, 콘트라스트 특성이 개선된 칼라표시장치 및 그 제조방법에 관한 것이다.The present invention relates to a color display device, and more particularly, to a color display device with improved contrast characteristics and a manufacturing method thereof.

일반적으로, 칼라 음극선관은 도 1과 같이 내면에 형광막(4)이 부착된 패널(1), 및 후방으로 깔대기 모양의 네크부(3)를 갖는 펀넬(2)로 구성되어 있으며, 상기 네크부(3)에는 형광체 스크린을 표시하기 위한 R, G, B의 3색의 전자빔(5)을 방출하는 전자총(6)이 내장되어 있어, 상기 전자총(6)으로부터 방출되는 전자빔(5)이 네크부의 외구부에 부착된 편향 요크(7)의 자계에 의해 제어되고, 새도우 마스크(8)에 의해 색선별이 이루어져 형광막(4) 스크린의 소정의 위치에 충돌되어 형광체를 발광시킴으로써 화상이 디스플레이 된다.In general, the color cathode ray tube is composed of a panel (1) having a fluorescent film (4) attached to the inner surface as shown in Figure 1, and a funnel (2) having a funnel-shaped neck (3) in the rear, the neck The part 3 has an electron gun 6 which emits three electron beams 5 of R, G, and B for displaying the phosphor screen, and the electron beam 5 emitted from the electron gun 6 is necked. Controlled by the magnetic field of the deflection yoke 7 attached to the negative outer circumference portion, color screening is performed by the shadow mask 8 to impinge on a predetermined position on the screen of the fluorescent film 4 so as to emit the phosphor to display an image. .

상기 형광막(4)이 부착되어 있는 패널부는 도 2와 같이, 외부광에 의한 난반사를 방지하고 외부광을 흡수하여 각 형광체의 색순도를 높이기 위해서 패턴형성된 소위 BM(Black Matrix)으로 불리는 광흡수층(10), 상기 패턴 사이에 형성된 R, G, B의 형광체층(12), 및 상기 형광체의 발광휘도를 높이기 위해서 형광체층 위에 형성된 금속반사막(미도시)으로 이루어져 있고, 이때, 상기 광흡수층(10)은 흑연, 암모니아, 계면활성제, 및 순수로 구성되어 있다.The panel portion to which the fluorescent film 4 is attached, as shown in FIG. 2, has a light absorbing layer called BM (Black Matrix) formed in a patterned form to prevent diffuse reflection by external light and to absorb external light to increase color purity of each phosphor. 10), R, G, B phosphor layer 12 formed between the pattern, and a metal reflective film (not shown) formed on the phosphor layer in order to increase the luminance of the phosphor, wherein the light absorbing layer (10) ) Is composed of graphite, ammonia, surfactant, and pure water.

그러나, 400℃이상의 고온이 요구되는 유기물질 소성공정, 패널과 펀넬의 융착공정 등 칼라 표시장치의 제조공정중에 상기 광흡수층(10)을 구성하는 물질 중 유기물질은 200℃에서부터 분해되기 시작하여 450℃까지 98%가 탄화되면서 가스상태로 방출되게 된다. 이때 흑연 입자를 둘러싸고 있던 상기 유기물질들이 방출되면서 그 표면적만큼 공극이 발생하게 되며, 또한 상기 유기물질들은 대부분 가스상태로 방출되지만 일부는 재 성분으로 남아서 상기 흑연과 흑연 입자사이에 잔사를 남기게 된다.However, among the materials constituting the light absorbing layer 10 during the manufacturing process of the color display device, such as an organic material firing process requiring a high temperature of 400 ° C. or higher and a panel and funnel fusion process, the organic material begins to decompose at 200 ° C. to 450 98% is carbonized until it is released as a gas. At this time, as the organic materials surrounding the graphite particles are released, voids are generated as much as the surface area, and the organic materials are mostly released in a gaseous state, but some remain as ashes, leaving a residue between the graphite and the graphite particles.

따라서, 상기 잔사 및 공극으로 인해서 칼라표시장치의 흑색도를 저하시켜 결국 콘트라스트 특성이 저하되는 문제점이 있다.Accordingly, there is a problem in that the blackness of the color display device is lowered due to the residues and voids, which in turn lowers the contrast characteristic.

본 발명은 상기 문제점을 해결하기 위해 안출된 것으로서, 본 발명의 목적은 흑색도를 증가시켜 콘트라스트 특성이 우수한 칼라표시장치 및 그 제조방법을 제공하는 것이다.SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a color display device having excellent contrast characteristics by increasing blackness and a manufacturing method thereof.

도 1은 종래 칼라음극선관의 개괄적 단면도이다.1 is a schematic cross-sectional view of a conventional color cathode ray tube.

도 2는 종래 칼라음극선관의 패널부의 단면도이다.2 is a cross-sectional view of a panel portion of a conventional color cathode ray tube.

도 3은 본 발명에 따른 칼라표시장치의 패널부의 단면도이다.3 is a cross-sectional view of a panel portion of a color display device according to the present invention.

도 4a 내지 도 4f는 본 발명에 따른 칼라표시장치의 패널부의 제조 공정 단면도이다.4A to 4F are cross-sectional views illustrating manufacturing steps of the panel unit of the color display device according to the present invention.

<도면의 주요부에 대한 설명><Description of main parts of drawing>

1, 100 : 패널1, 100: panel

10, 110 : 광흡수층10, 110: light absorption layer

12, 120 : 형광체12, 120 phosphor

102 : 포토레지스트102: photoresist

본 발명은 상기 목적을 달성하기 위해서, 패널의 내면에 소정의 간격을 갖고 형성되며, 주성분이 흑연, 암모니아, 계면활성제, 순수, 및 규산알카리염으로 이루어진 광흡수물질층; 및 상기 광흡수물질층 사이에 형성된 적색, 녹색, 및 청색의 형광체를 포함하는 칼라표시장치 및 그 제조방법을 제공한다.In order to achieve the above object, the present invention is formed with a predetermined interval on the inner surface of the panel, the main component is a light absorbing material layer consisting of graphite, ammonia, surfactant, pure water, and alkali silicate salt; And a red, green, and blue phosphor formed between the light absorbing material layer and a method of manufacturing the same.

상기와 같이, 본 발명은 광흡수물질층에 규산알카리염을 첨가함으로써, 규산알카리염의 성분 중에 규소(Si)성분이, 탄화되어 방출되는 유기물질의 공극을 메우고 또한 흑연과 흑연입자사이의 결합력을 강화시키는 바인더 역할을 하여 칼라표시장치의 흑색도를 향상시킨 것을 특징으로 한다.As described above, according to the present invention, by adding an alkali silicate salt to the light absorbing material layer, the silicon (Si) component is carbonized in the alkali silicate component to fill the pores of the organic material released by carbonization, and also improves the bonding force between the graphite and the graphite particles. The black color of the color display device is improved by acting as a binder to reinforce.

상기 칼라표시장치는 내면에 형광막이 도포된 패널, 후방으로 깔대기 모양의 네크부를 갖는 펀넬, 상기 네크부에 장착되어 전자빔을 방출하는 전자총, 상기 전자빔을 편향시키는 편향요크, 상기 편향요크에 의해 편향된 전자빔의 색선별을 하는 쉐도우마스크를 포함하는 것을 특징으로 하는 칼라음극선관, 또는 평면형 칼라음극선관일 수 있다.The color display device includes a panel coated with a fluorescent film on an inner surface, a funnel having a funnel-shaped neck portion rearward, an electron gun mounted on the neck portion to emit an electron beam, a deflection yoke for deflecting the electron beam, and an electron beam deflected by the deflection yoke. It may be a color cathode ray tube, or a flat color cathode ray tube, characterized in that it comprises a shadow mask for screening the color.

이하, 도면을 참조로 본 발명을 상세히 설명한다.Hereinafter, the present invention will be described in detail with reference to the drawings.

도 3은 본 발명에 따른 칼라표시장치의 패널부의 단면도로서, 본 발명은 패널(100)면에 소정의 간격을 갖고 형성되며, 주성분이 흑연, 암모니아, 계면활성제, 순수, 및 규산알카리염으로 이루어진 광흡수물질층(110); 상기 광흡수물질층(110) 사이에 형성된 적색, 녹색, 및 청색의 형광체(120)를 포함하는 칼라표시장치를 제공한다.3 is a cross-sectional view of a panel portion of a color display device according to the present invention. The present invention has a predetermined spacing on the surface of the panel 100, and the main component is composed of graphite, ammonia, surfactants, pure water, and alkali silicate salts. Light absorbing material layer 110; A color display device including red, green, and blue phosphors 120 formed between the light absorbing material layer 110 is provided.

상기 규산알카리염으로는 SiO2가 바람직하고, 그 함량은 5 내지 40중량%인 것이 바람직하다.As the alkali silicate salt, SiO 2 is preferable, and the content thereof is preferably 5 to 40% by weight.

상기 형광체(120)위에는 형광체의 발광 휘도를 상승시키기 위해서 금속반사막(미도시)이 형성될 수 있다.A metal reflection film (not shown) may be formed on the phosphor 120 to increase the emission luminance of the phosphor.

그 외, 패널 및 형광체 등은 본 발명이 속하는 당업계에서 통상의 지식을 가진 당업자가 변경 실시할 수 있는 범위내에서 다양하게 실시할 수 있다.In addition, the panel, the phosphor, and the like can be variously carried out within the range that can be modified by those skilled in the art to which the present invention pertains.

도 4a 내지 도 4f는 본 발명에 따른 칼라표시장치의 패널부의 제조 공정 단면도로서, 본 발명은 패널(100)을 준비하는 단계; 상기 패널(100) 내면에 포토레지스트액(102)을 도포하고 패터닝하는 단계; 상기 패널(100) 내면 전체에 주성분이 흑연, 암모니아, 계면활성제, 순수, 및 규산알카리염으로 이루어진 광흡수물질(110)을 도포하는 단계; 에칭액을 사용하여 상기 포토레지스트 패턴(102)이 형성된 부분을 제거하여 소정 간격을 갖는 광흡수물질층(110)을 형성하는 단계; 및 상기 광흡수물질층(110) 사이에 적색, 녹색, 및 청색의 형광체(120)를 형성하는 단계를 포함하는 칼라음극선관의 제조방법을 제공한다.4A to 4F are cross-sectional views of a manufacturing process of a panel unit of a color display device according to the present invention, the present invention comprising the steps of preparing a panel 100; Applying and patterning a photoresist liquid (102) on an inner surface of the panel (100); Applying a light absorbing material (110) composed of graphite, ammonia, surfactants, pure water, and alkali silicate salts as main components on the entire inner surface of the panel (100); Forming a light absorbing material layer (110) having a predetermined interval by removing a portion where the photoresist pattern (102) is formed using an etching solution; And forming red, green, and blue phosphors 120 between the light absorbing material layers 110.

상기 패널(100)을 준비하는 단계는 패널 내면을 세척제, 순수 및 공수등으로 세척하는 공정이다.Preparing the panel 100 is a process of washing the inner surface of the panel with a detergent, pure water and airborne.

상기 포토레지스트(102)를 패터닝하는 단계는 도 4a와 같이 패널(100)위에 포토레지스트 액(102)을 주입하고 고속 회전시켜 균일한 막 두께로 도포하고 건조시킨 후, 도 4b와 같이 새도우 마스크를 끼워 적색, 녹색, 및 청색의 형광체가 형성될 부분에 노광을 한 후, 도 4c와 같이 순수로 현상하는 공정으로 이루어져 있다. 이때, 상기 노광된 부분은 경화되고, 노광되지 않은 부분은 경화되지 않아 순수로 현상하면 노광되지 않은 부분만 제거되게 된다.The patterning of the photoresist 102 is performed by injecting the photoresist liquid 102 onto the panel 100 as shown in FIG. 4A, rotating it at a high speed, coating and drying the film at a uniform film thickness, and then applying a shadow mask as shown in FIG. 4B. After exposing to the portions where red, green, and blue phosphors are to be formed, they are developed with pure water as shown in FIG. 4C. In this case, the exposed part is cured, and the unexposed part is not cured, and when developed in pure water, only the unexposed part is removed.

상기 광흡수물질(110)을 도포하는 단계는 도 4d와 같이 패터닝된 포토레지스트(102)를 포함하여 패널(100)전면에 주성분이 흑연, 암모니아, 계면활성제, 순수, 및 규산알카리염으로 이루어진 광흡수물질을 도포하는 공정이다.The coating of the light absorbing material 110 includes a patterned photoresist 102 as shown in FIG. 4D, and a light composed of graphite, ammonia, surfactants, pure water, and alkali silicate salts on the front of the panel 100. It is a process of applying absorbent material.

이때, 상기 규산알카리염으로는 SiO2가 바람직하고, 그 함량은 5 내지 40중량%인 것이 바람직하다.At this time, the alkali silicate salt is preferably SiO 2 , the content is preferably 5 to 40% by weight.

상기 광흡수물질층(110)을 형성하는 단계는 도 4e와 같이 에칭액을 사용하여 포토레지스 패턴(102)이 형성된 부분의 광흡수물질과 포토레지스트 패턴을 박리, 제거하여 소정 간격을 갖는 광흡수물질층(110)을 형성하는 공정으로, 에칭액이 포토레지스트 패턴에 침투할 수 있도록 충분히 적셔주는 것이 바람직하다.The forming of the light absorbing material layer 110 may be performed by removing and removing the light absorbing material and the photoresist pattern of the portion where the photoresist pattern 102 is formed using an etchant as shown in FIG. 4E. In the process of forming the layer 110, it is preferable to wet the etchant sufficiently to penetrate the photoresist pattern.

상기 형광체(120) 형성공정은 도 4f와 같이 상기 광흡수물질층(110) 사이에적색, 녹색, 청색의 형광체(120)를 형성시키는 공정으로서, 이로서 칼라표시장치의 패널부가 완성된다.The phosphor 120 is formed to form red, green, and blue phosphors 120 between the light absorbing material layers 110 as shown in FIG. 4F, thereby completing the panel portion of the color display device.

또한, 상기 형광체(120)위에 형광체의 발광 휘도를 상승시키기 위해서 금속반사막을 형성하는 공정이 추가로 포함될 수 있다.In addition, a process of forming a metal reflection film on the phosphor 120 to increase the emission luminance of the phosphor may be further included.

이하, 본 발명에 따른 실시예와 종래 기술에 따른 비교예를 설명한다.Hereinafter, examples according to the present invention and comparative examples according to the prior art will be described.

실시예Example

5 내지 30중량%의 흑연, 0.5 내지 1 중량%의 암모니아, 0.5 내지 1중량%의 계면활성제, 40 내지 65%의 순수, 및 5 내지 40 중량%의 SiO2를 주성분으로 하는 광흡수물질을 사용하여, 전술한 공정에 따라 제작된 패널부를 갖는 칼라음극선관을 제조하였다.5-30 wt% graphite, 0.5-1 wt% ammonia, 0.5-1 wt% surfactant, 40-65% pure water, and 5-40 wt% SiO 2 based light absorbing material Thus, a color cathode ray tube having a panel portion manufactured according to the above-described process was manufactured.

비교예Comparative example

5 내지 30중량%의 흑연, 0.5 내지 1 중량%의 암모니아, 0.5 내지 1중량%의 계면활성제, 60 내지 94중량%의 순수를 주성분으로 하는 광흡수물질을 사용하여, 실시예와 동일한 방법으로 칼라음극선관을 제조하였다.In the same manner as in Example, using a light absorbing material mainly composed of 5 to 30% by weight graphite, 0.5 to 1% by weight ammonia, 0.5 to 1% by weight surfactant, 60 to 94% by weight pure water A cathode ray tube was prepared.

하기 표 1은 상기 실시예와 비교예의 광흡수물질을 글라스에 일정한 막두께로 형성한 후 소성 전후의 흑색도 변화를 보여주는 것이다.Table 1 shows the blackness change before and after firing after forming the light-absorbing material of the Examples and Comparative Examples to a certain film thickness on the glass.

표 1Table 1

실시예Example 비교예Comparative example 소성 전Before firing 소성 후After firing 소성 전Before firing 소성 후After firing LL 13.5813.58 14.2514.25 12.1712.17 38.6238.62 a*a * -1.84-1.84 -0.96-0.96 -1.14-1.14 0.170.17 b*b * -1.93-1.93 -1.28-1.28 -2.58-2.58 -1.38-1.38

La*b* 좌표계는 물체색을 측정하는 칼라공간이다.La * b * coordinate system is a color space for measuring object color.

여기서, L은 반사휘도로서 좌표값이 0에 가까울수록 무채색에 가깝고 반사를 일으키지 않고, a*, b*는 색좌표로서 표준이 되는 완전반사체의 삼자극치 값을 기준으로 한다.Here, L is the reflected luminance, and the closer the coordinate value is to 0, the closer to the achromatic color and no reflection, and a * and b * are based on the tristimulus value of the perfect reflector which is the standard as the color coordinate.

상기 표 1에서 보는 바와 같이, 본 발명에 따른 실시예의 경우 L값은 소성 전 13.58에서 소성 후 14.25로 약 4.9%증가하나, 종래 방법에 따른 비교예의 경우 소성 전 12.17에서 소성 후 38.62로 약 217.3%가 증가한다. 이와 같이, 본 발명의 경우 광흡수층에서 빛의 흡수로 흑색도가 대폭 증가되어 칼라표시장치의 콘트라스트 특성이 향상된다.As shown in Table 1, in the embodiment according to the present invention, the L value increased by about 4.9% from 13.58 before firing to 14.25 after firing, but in the comparative example according to the conventional method, about 217.3% from 12.17 before firing to 38.62 after firing Increases. As described above, in the case of the present invention, blackness is greatly increased by absorption of light in the light absorbing layer, thereby improving contrast characteristics of the color display device.

상기 구조에 의한 본 발명은, 광흡수층을 구성하는 규산 알카리염이 칼라표시장치의 제조공정 중 발생하는 유기물질의 공극을 메우고 또한 흑연과 흑연입자사이의 결합력을 강화시켜 흑색도를 증가시킴으로써 콘트라스트 특성이 향상되는 효과가 있다.According to the present invention, the alkali silicate constituting the light absorbing layer fills the pores of organic materials generated during the manufacturing process of the color display device, and increases the blackness by increasing the binding force between the graphite and the graphite particles, thereby increasing the blackness. This has the effect of being improved.

Claims (6)

패널의 내면에 소정의 간격을 갖고 형성되며, 주성분이 흑연, 암모니아, 계면활성제, 순수, 및 규산알카리염으로 이루어진 광흡수물질층; 및A light absorbing material layer formed on the inner surface of the panel at predetermined intervals, the main component consisting of graphite, ammonia, a surfactant, pure water, and an alkali silicate salt; And 상기 광흡수물질층 사이에 형성된 적색, 녹색, 및 청색의 형광체를 포함하는 칼라표시장치.And a red, green, and blue phosphor formed between the light absorbing material layers. 제 1항에 있어서,The method of claim 1, 상기 광흡수물질층의 주성분 중 규산알카리염의 함량이 5 내지 40중량%인 것을 특징으로 하는 칼라표시장치.The color display device, characterized in that the alkali silicate content of the main component of the light absorbing material layer is 5 to 40% by weight. 제 1항 또는 제 2항에 있어서,The method according to claim 1 or 2, 상기 규산알카리염이 SiO2인 것을 특징으로 하는 칼라표시장치.Wherein said alkali silicate salt is SiO 2 . 패널을 준비하는 단계;Preparing a panel; 상기 패널 내면에 포토레지스트액을 도포하고 패터닝하는 단계;Applying and patterning a photoresist liquid on the inner surface of the panel; 상기 패널 내면 전체에 주성분이 흑연, 암모니아, 계면활성제, 순수, 및 규산알카리염으로 이루어진 광흡수물질을 도포하는 단계;Coating a light absorbing material having a main component of graphite, ammonia, a surfactant, pure water, and an alkali silicate salt on the entire inner surface of the panel; 에칭액을 사용하여 상기 포토레지스트 패턴이 형성된 부분을 제거하여 소정간격을 갖는 광흡수물질층을 형성하는 단계; 및Forming a light absorbing material layer having a predetermined interval by removing a portion where the photoresist pattern is formed using an etching solution; And 상기 광흡수물질층 사이에 적색, 녹색, 및 청색의 형광체를 형성하는 단계를 포함하는 칼라표시장치의 제조방법.And forming red, green, and blue phosphors between the light absorbing material layers. 제 4항에 있어서,The method of claim 4, wherein 상기 광흡수물질 중 규산알카리염의 함량이 5 내지 40중량%인 것을 특징으로 하는 칼라표시장치의 제조방법.The content of the alkali silicate salt in the light absorbing material is a manufacturing method of a color display device, characterized in that 5 to 40% by weight. 제 4항 또는 제 5항에 있어서,The method according to claim 4 or 5, 상기 규산알카리염이 SiO2인 것을 특징으로 하는 칼라표시장치의 제조방법.And the alkali silicate salt is SiO 2 .
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