KR20010003740A - Phosphor screen used in color picture tobe and method for making the same - Google Patents

Phosphor screen used in color picture tobe and method for making the same Download PDF

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Publication number
KR20010003740A
KR20010003740A KR1019990024169A KR19990024169A KR20010003740A KR 20010003740 A KR20010003740 A KR 20010003740A KR 1019990024169 A KR1019990024169 A KR 1019990024169A KR 19990024169 A KR19990024169 A KR 19990024169A KR 20010003740 A KR20010003740 A KR 20010003740A
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South Korea
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fluorescent film
black matrix
fluorescent
film
phosphor
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KR1019990024169A
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Korean (ko)
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KR100337876B1 (en
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최도영
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김순택
삼성에스디아이 주식회사
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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
    • H01J29/20Luminescent screens characterised by the luminescent material
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01JELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J9/00Apparatus 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
    • H01J9/20Manufacture of screens on or from which an image or pattern is formed, picked up, converted or stored; Applying coatings to the vessel
    • H01J9/22Applying luminescent coatings

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)

Abstract

PURPOSE: A fluorescent film of a color brown tube is provided to improve the brightness by forming a fluorescent film, which is composed of a white fluorescent substance, on a black matrix. CONSTITUTION: A fluorescent film of a color brown tube(100) includes a red fluorescent film(102), a green fluorescent film(104), a blue fluorescent film(106), a black matrix(108), the fourth fluorescent film(110). The black matrix(108) is formed between the green fluorescent film(104) and the blue fluorescent film(106) and the black matrix(108). The fourth fluorescent film(110) is formed between black matrixes(108) and emits the light by an electric beam and is composed of the white fluorescent substance in the field of Y2O2S:Tb and amounts to 5-50% of the whole black matrix(108). The brightness is improved by the fourth fluorescent film(110).

Description

컬러브라운관의 형광막 및 그 형성방법{Phosphor screen used in color picture tobe and method for making the same}Phosphor screen used in color picture tobe and method for making the same}

본 발명은 칼라브라운관의 형광막에 관한 것으로, 특히 블랙 매트릭스의 폭 내부에 흰색 형광체로 된 형광막을 형성하여 휘도를 향상시킬 수 있는 칼라브라운관의 형광막 및 그 형성방법에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fluorescent film of a color brown tube, and more particularly, to a fluorescent film of a color brown tube and a method of forming the same, which can improve luminance by forming a fluorescent film of a white phosphor inside a width of a black matrix.

일반적으로 칼라브라운관은 도 1에 도시한 바와 같이, 전자총(2)으로부터 방출된 녹색, 청색, 적색의 전자빔을 편향요크(4)에 의해 편향하여 패널(6)쪽으로 주사되게 하고, 새도우마스크(8)의 구멍을 통과시켜 색선별되게 하며 이것을 패널 내면에 형성된 녹색, 청색, 적색의 형광체가 있는 형광막(10)에 랜딩되게 함으로써 소망의 칼라 화상을 표현한다.In general, as shown in FIG. 1, the color-brown tube deflects the green, blue, and red electron beams emitted from the electron gun 2 to be deflected by the deflection yoke 4 to be directed toward the panel 6, and the shadow mask 8 By passing through the holes of), the color is selected, and this is landed on the fluorescent film 10 having the green, blue, and red phosphors formed on the inner surface of the panel to express a desired color image.

형광막(10)은 전자빔의 에너지를 광에너지로 변환시키는 곳으로 형광체의 여기 발광에 의하여 화상을 구현한다. 이와 같은 형광막은 각각 녹색, 청색, 적색의 형광체가 글라스 패널상에 규칙적으로 배열되어 형성되고, 각각의 형광체 사이에 통상의 블랙 매트릭스 패턴을 형성하여 만들어진다.The fluorescent film 10 converts the energy of the electron beam into light energy to implement an image by excitation emission of the phosphor. Such a fluorescent film is formed by regularly arranging green, blue, and red phosphors on a glass panel, and forming a normal black matrix pattern between each phosphor.

블랙 매트릭스 형성 공정은 글라스 패널에 감광성수지를 도포한 다음, 에멀젼상의 흑연을 도포하고, 이것을 노광 및 현상하여 녹색, 청색, 적색 형광체가 형성될 공간을 둘러싸도록 흑연막을 형성시키는 것이다.In the black matrix forming process, the photosensitive resin is applied to a glass panel, and then graphite in an emulsion is applied, which is exposed and developed to form a graphite film to surround a space where green, blue and red phosphors are to be formed.

녹색, 청색, 적색 형광체 형성공정은 슬러리 공정이라고도 하며, 블랙 매트릭스가 도포되어 있는 패널을 세정하고, 상기 패널 내면에 감광성수지와 해당 형광체가 혼합되어 있는 슬러리액을 도포하여, 이것을 노광 및 현상하므로 형성할 수 있다.The green, blue, and red phosphor forming process is also called a slurry process, and is formed by washing a panel coated with a black matrix, applying a slurry liquid containing a photosensitive resin and the phosphor mixed on the inner surface of the panel, and exposing and developing the same. can do.

상기 슬러리액은 폴리비닐알콜 수용액에 중크롬산 나트륨을 혼합한 액에 해당 형광체를 현탁시킨 것이고, 여기에는 글라스와의 친화력, 도포 특성의 개선을 위하여 계면활성제를 소량 혼합하고 있다.The slurry is a suspension of the phosphor in a solution of polyvinyl alcohol in which sodium dichromate is mixed, and a small amount of a surfactant is mixed therein to improve affinity with glass and coating properties.

슬러리액을 패널 내면에 도포한 후 패널을 150 ~ 250 RPM 으로 회전시켜서 슬러리를 분산시키고 적외선 히터 블로어로 형광막을 건조시킨다. 그 후 마스크를 개재하여 노광을 행한다. 노광을 통해 슬러리 중의 폴리비닐알콜과 중크롬산 나트륨이 경화되어 비수용성으로 된다.After applying the slurry liquid to the inner surface of the panel, the panel is rotated at 150 to 250 RPM to disperse the slurry, and the fluorescent film is dried by an infrared heater blower. Thereafter, exposure is performed through a mask. The exposure causes the polyvinyl alcohol and sodium dichromate in the slurry to cure and become water-insoluble.

다음에 온수로 노광부분을 세정하면 비노광부는 제거되고 노광부만 정착(定着)하여 해당 형광체 패턴이 형성된다.Next, when the exposed portion is washed with warm water, the non-exposed portion is removed and only the exposed portion is fixed to form the phosphor pattern.

이와 같은 칼라브라운관의 형광막에 요구되는 특성은 여러가지가 있으나, 최근의 칼라브라운관의 대형화, 고정세화에 따라 고휘도화가 중요시되고 있으며, 이러한 휘도 향상을 위하여 종래 적용하고 있는 방법으로는, 블랙 매트릭스의 폭을 줄여 적색, 녹색, 청색 형광체 스트라이프의 폭을 넓히거나, 고휘도 형광체를 사용하는 방법이 있다.Although the characteristics required for the fluorescent film of such a color brown tube are various, high luminance has become important with the recent increase in the size and the high definition of the color brown tube. In order to improve the luminance, the width of the black matrix is conventionally applied. By reducing the width of the red, green, and blue phosphor stripe, there is a method using a high brightness phosphor.

그러나 블랙 매트릭스의 폭을 줄여 적색, 녹색, 청색 형광체 스트라이프의 폭을 넓히는 방법은 어느 정도의 휘도 향상은 있으나 콘트라스트를 감안할 때 큰 효과를 기대할 수 없으며, 또한 고휘도를 위하여 여러 형광체 재료가 개발되었지만 이 재료는 고가로 이들을 사용하여 형광막을 형성하는 것은 그 생산성에 문제가 있었다.However, the method of increasing the width of the red, green, and blue phosphor stripes by reducing the width of the black matrix has some improvement in brightness, but considering the contrast, a large effect cannot be expected. The use of these at high cost to form a fluorescent film had a problem in its productivity.

본 발명은 상기한 종래의 문제점을 해결하기 위하여 안출된 것으로, 블랙 매트릭스에 흰색 형광체를 사용하여 형광막을 형성하여 휘도를 향상시킬 수 있는 칼라브라운관의 형광막 및 그 형성방법을 제공하는 것을 그 목적으로 한다.The present invention has been made to solve the above-mentioned conventional problems, and to provide a fluorescent film of a color-brown tube and a method of forming the same that can improve the brightness by forming a fluorescent film using a white phosphor on a black matrix. do.

상기 목적을 실현하기 위하여, 본 발명은 Y2O2S:Tb 의 Tb 부할 이트륨 계열의 흰색 형광체를 사용하여 기존의 블랙 매트릭스의 폭 내부에 형광체가 들어갈 수 있도록 공간을 만들어 별도의 형광막을 형성하고, 이때 블랙 매트릭스에 부딪히는 전자빔에 의하여 흰색 형광체가 발광되게 하여 형광막의 전체 휘도를 향상시킨다.In order to realize the above object, the present invention uses a Tb-loaded yttrium-based white phosphor of Y 2 O 2 S: Tb to form a space to allow the phosphor to enter the width of the existing black matrix to form a separate phosphor film In this case, the white phosphor is emitted by an electron beam that strikes the black matrix, thereby improving the overall luminance of the phosphor.

상기 블랙 매트릭스의 폭은, 예를 들어 기존의 칼라브라운관과 같이 동일하게 할수 있으며, 상기 흰색 형광체에 의한 형광막은 블랙 매트릭스 폭의 5∼50%정도로 1∼2 스트라이프로 형성할 수 있다.For example, the width of the black matrix may be the same as that of a conventional color brown tube, and the fluorescent film by the white phosphor may be formed in 1 to 2 stripes at about 5 to 50% of the width of the black matrix.

상기 흰색 형광체의 형광막은 블랙 매트릭의 형성 공정에서 폭 내부에 소정의 공간을 형성하고, 상기 공간에 감광성수지와 흰색 형광체를 혼합한 슬러리를 도포하고, 이것은 노광 및 현상하여 제조할 수 있다.The fluorescent film of the white phosphor forms a predetermined space inside a width in a process of forming a black matrix, and applies a slurry in which the photosensitive resin and the white phosphor are mixed in the space, which can be manufactured by exposure and development.

도 1은 일반적인 칼라브라운관의 형광막을 도시한 단면도,1 is a cross-sectional view showing a fluorescent film of a general color brown tube;

도 2는 본 발명의 흰색 형광체의 형광막을 도시한 글라스 패널의 단면도이다.2 is a cross-sectional view of a glass panel showing a fluorescent film of a white phosphor of the present invention.

※ 도면의 주요 부분에 대한 부호의 설명 ※※ Explanation of code about main part of drawing ※

6-패널 100-형광막6-Panel 100-Fluorescent Film

102-적색 형광막 104-녹색 형광막102-red fluorescent film 104-green fluorescent film

106-청색 형광막 108-블랙 매트릭스106-blue fluorescent film 108-black matrix

110-제 4 형광막110-fourth fluorescent film

이하 본 발명의 실시예를 첨부 도면에 의거하여 보다 상세히 설명한다.DETAILED DESCRIPTION Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

도 1은 본 발명의 흰색 형광체를 포함하는 형광막이 형성된 글라스 패널의 내부 구성을 보여주고 있다.1 shows an internal configuration of a glass panel in which a fluorescent film including a white phosphor of the present invention is formed.

도면에서와 같이 본 발명의 칼라브라운관의 형광막(100)은 적색 형광막(102), 녹색 형광막(104), 청색 형광막(106)의 사이에 블랙 매트릭스(108)를 형성하고 있으며, 블랙 매트릭스(108)의 폭 내부에 소정 공간을 마련하여 제 4 형광막(110)으로 흰색 형광체를 형성하고 있다.As shown in the drawing, the fluorescent film 100 of the color-brown tube of the present invention forms a black matrix 108 between the red fluorescent film 102, the green fluorescent film 104, and the blue fluorescent film 106, and black A predetermined space is provided inside the width of the matrix 108 to form a white phosphor from the fourth fluorescent film 110.

흰색 형광체는 Y2O2S:Tb 의 Tb 부할 이트륨 계열을 사용하며 도면에서와 같이 1 내지 2 스프라이프로 형성할 수 있지만, 전체적으로 블랙 매트릭스(108)의 5∼50%의 범위로 형성하는 것이 좋다. 여기서 흰색 형광체가 5% 이하이면 그 효과가 미미하고, 50% 이상이면 휘도가 좋은 반면 콘트라스트가 나빠지는 문제점이 있다.The white phosphor uses a Tb-loaded yttrium series of Y 2 O 2 S: Tb and can be formed with 1 to 2 splices as shown in the drawing, but it is generally formed in the range of 5 to 50% of the black matrix 108. good. If the white phosphor is 5% or less, the effect is insignificant. If the white phosphor is 50% or more, the brightness is good while the contrast is bad.

블랙 매트릭스(108)의 전체 폭은 100∼160 ㎛ 정도로 기존의 칼라브라운관과 동일하게 형성한다.The overall width of the black matrix 108 is formed to be the same as the conventional color brown tube of about 100 ~ 160 ㎛.

한편 본 발명의 형광막 패턴은 도면을 통하여 스트라이프 타입을 보여주고 있지만, 일반적으로 사용되는 도트 및 그릴 타입을 모두 포함할 수 있다.Meanwhile, although the fluorescent film pattern of the present invention shows a stripe type through the drawings, it may include all of the dot and grill types generally used.

이상에서 설명한 본 발명의 형광막을 구현하는 방법을 설명한다.A method of implementing the fluorescent film of the present invention described above will be described.

글라스 패널(6) 내면에 감광성수지막을 형성하기 위하여 가성소다, 불산, 순수 등으로 세정하여 패널 내면의 이물질을 제거한다. 폴리비닐알콜 및 중크롬산나트륨을 함유하는 감광성수지용액을 도포하고, 적색, 녹색, 청색 형광막과 제 4 형광막의 패턴을 갖는 마스크를 이용하여 노광 및 현상하여 소정 패턴을 갖는 감광성수지막을 형성한다. 이어서 흑연을 도포 및 건조하고 감광성수지막을 에칭하며, 측면의 흑연을 제거하여 블랙 매트릭스를 완료한다.In order to form a photosensitive resin film on the inner surface of the glass panel 6, it is washed with caustic soda, hydrofluoric acid, pure water, and the like to remove foreign substances on the inner surface of the panel. A photosensitive resin solution containing polyvinyl alcohol and sodium dichromate is applied, and exposed and developed using a mask having a pattern of red, green, and blue fluorescent films and a fourth fluorescent film to form a photosensitive resin film having a predetermined pattern. The graphite is then applied and dried, the photoresist film is etched, and the graphite on the side is removed to complete the black matrix.

다음, Y2O2S:Tb 의 Tb 부할 이트륨 계열의 흰색 형광체를 폴리비닐알콜 수용액에 중크롬산 나트륨을 혼합한 액에 현탁시킨 다음, 여기에 계면활성제를 소량 혼합하여 슬러리액을 만들고, 이것을 패널 내면에 전면 도포하고, 제 4 형광막의 패턴을 갖는 마스크를 이용하여 노광 및 현상하여 흰색 형광체의 형광막을 형성한다.Next, a Tb-loaded yttrium-based white phosphor of Y 2 O 2 S: Tb was suspended in a solution of sodium dichromate mixed with an aqueous polyvinyl alcohol solution, and then a small amount of a surfactant was mixed to form a slurry solution. The film is coated on the entire surface, and exposed and developed using a mask having a pattern of a fourth fluorescent film to form a fluorescent film of a white phosphor.

그리고 같은 방법으로 녹색, 청색, 적색 형광막의 순서로 각각 도포, 노광 및 현상하여 본 발명의 형광막(100)을 형성하였다.In the same manner, the fluorescent film 100 of the present invention was formed by coating, exposing and developing the green, blue, and red fluorescent films in the order.

상기 본 발명이 적용된 칼라브라운관은 기존 방식의 칼라브라운관에 비해 15% 정도의 휘도 향상을 기대할 수 있으며, 이것은 적색, 녹색 및 청색 형광체의 점유 면적이 화면의 70% 정도이고 블랙매트릭스가 30% 정도이나, 상기 블랙매트릭스에서 흰색 형광체가 점유하고 있는 비율이 50% 정도이므로, 전체적으로는 15% 정도의 휘도 향상을 실현할 수 있는 것이다.The color brown tube to which the present invention is applied can be expected to improve brightness by about 15% compared to the conventional color brown tube, which occupies about 70% of the screen area of the red, green and blue phosphors, and the black matrix is about 30%. Since the ratio of the white phosphor occupies about 50% in the black matrix, it is possible to realize a luminance improvement of about 15% as a whole.

이상 기술한 바와 같이, 본 발명은 기존의 칼라브라운관의 기공부품의 변경없이 Y2O2S:Tb 계열의 흰색 형광체를 사용하여 블랙 매트릭스 사이에 별도의 제 4 형광막을 형성하므로써 휘도 향상을 도모할 수 있다.As described above, the present invention can improve the brightness by forming a separate fourth fluorescent film between the black matrix using a Y 2 O 2 S: Tb series white phosphor without changing the pore component of the existing color brown tube. Can be.

Claims (4)

녹색, 청색 및 적색 형광막의 사이에 형성된 블랙 매트릭스를 포함하고, 상기 블랙 매트릭스에 소정의 공간을 마련하여 전자빔에 의해 여기 발광되는 제 4 형광막을 형성한 칼라브라운관의 형광막.A black-brown fluorescent film comprising a black matrix formed between green, blue and red fluorescent films, and having a predetermined space provided in the black matrix to form a fourth fluorescent film that is excited by an electron beam. 제 1 항에 있어서, 상기 제 4 형광막은 Y2O2S:Tb로 된 흰색 형광체인 것을 특징으로 하는 칼라브라운관의 형광막.The fluorescent film of a color brown tube according to claim 1, wherein said fourth fluorescent film is a white phosphor of Y 2 O 2 S: Tb. 제 1 항 내지 제 2 항에 있어서, 상기 제 4 형광막은 블랙 매트릭스 전체의 5∼50% 인 것을 특징으로 하는 칼라브라운관의 형광막.The fluorescent film of a color brown tube according to claim 1, wherein the fourth fluorescent film is 5 to 50% of the entire black matrix. 패널 내면에 감광성수지용액을 도포, 노광 및 현상하고 흑연을 도포하여 노광 및 현상하므로 폭 내부에 제 4 형광막에 해당하는 소정 공간을 갖도록 블랙 매트릭스를 형성하는 단계와; Y2O2S:Tb의 흰색 형광체 슬러리액을 패널 내면에 전면 도포하고, 마스크를 이용하여 노광 및 현상하므로 상기 공간에 제 4 형광막을 형성하는 단계를 포함하는 칼라브라운관의 형광막 형성방법.Forming a black matrix such that the photosensitive resin solution is coated, exposed and developed on the inner surface of the panel, and the graphite is exposed and developed by applying graphite to have a predetermined space corresponding to the fourth fluorescent film in a width thereof; A method of forming a fluorescent film of a color-brown tube, comprising: applying a white phosphor slurry solution of Y 2 O 2 S: Tb to the inner surface of the panel, and exposing and developing using a mask to form a fourth fluorescent film in the space.
KR1019990024169A 1999-06-25 1999-06-25 Phosphor screen used in color picture tobe and method for making the same KR100337876B1 (en)

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