KR100337876B1 - 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 PDFInfo
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- KR100337876B1 KR100337876B1 KR1019990024169A KR19990024169A KR100337876B1 KR 100337876 B1 KR100337876 B1 KR 100337876B1 KR 1019990024169 A KR1019990024169 A KR 1019990024169A KR 19990024169 A KR19990024169 A KR 19990024169A KR 100337876 B1 KR100337876 B1 KR 100337876B1
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- fluorescent film
- black matrix
- phosphor
- white
- forming
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- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims abstract description 12
- 239000011159 matrix material Substances 0.000 claims abstract description 28
- 239000002002 slurry Substances 0.000 claims description 9
- 239000011347 resin Substances 0.000 claims description 7
- 229920005989 resin Polymers 0.000 claims description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 5
- 229910002804 graphite Inorganic materials 0.000 claims description 5
- 239000010439 graphite Substances 0.000 claims description 5
- 239000011248 coating agent Substances 0.000 claims description 4
- 238000000576 coating method Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 claims 1
- 238000010894 electron beam technology Methods 0.000 abstract description 4
- 150000003746 yttrium Chemical class 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 3
- 239000011521 glass Substances 0.000 description 6
- 239000004372 Polyvinyl alcohol Substances 0.000 description 4
- 229920002451 polyvinyl alcohol Polymers 0.000 description 4
- JHWIEAWILPSRMU-UHFFFAOYSA-N 2-methyl-3-pyrimidin-4-ylpropanoic acid Chemical compound OC(=O)C(C)CC1=CC=NC=N1 JHWIEAWILPSRMU-UHFFFAOYSA-N 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000004094 surface-active agent Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 108010043121 Green Fluorescent Proteins Proteins 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 229920002120 photoresistant polymer Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 235000011121 sodium hydroxide Nutrition 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- 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
- H01J29/20—Luminescent screens characterised by the luminescent material
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
Abstract
목적: 블랙 매트릭스에 흰색 형광체로 된 형광막을 형성하여 휘도를 향상시킬 수 있는 칼라브라운관의 형광막 및 그 형성방법을 제공한다.PURPOSE: To provide 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 white phosphor on a black matrix.
구성: 본 발명은 Y2O2S:Tb 의 Tb 부활 이트륨 계열의 흰색 형광체를 사용하여, 기존의 블랙 매트릭스의 폭 내부에 형광체가 들어갈 수 있도록 공간을 만들어 별도의 흰색 형광막을 형성한다.Composition: The present invention uses a Tb-activated yttrium-based white phosphor of Y 2 O 2 S: Tb to form a space to allow phosphors to enter inside the width of a conventional black matrix to form a separate white phosphor.
효과: 녹색, 청색 및 적색 형광막과 함께 블랙 매트릭스에 부딪히는 여분의 전자빔을 이용하여 흰색 형광체가 발광되게 하므로 형광막의 전체 휘도를 향상시킬 수 있다.Effect: The white phosphor is emitted using an extra electron beam that strikes the black matrix together with the green, blue and red phosphors, thereby improving the overall luminance of the phosphor.
Description
본 발명은 칼라브라운관의 형광막에 관한 것으로, 특히 블랙 매트릭스의 폭내부에 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 [0001] 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 개선을위하여 계면활성제를 소량 혼합하고 있다.The slurry is a suspension of the phosphor in a solution of sodium polychromate mixed with an aqueous polyvinyl alcohol solution, in which a small amount of a surfactant is mixed 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 부활 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-activated 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 블랙 매트릭의 형성 공정에서 폭 내부에 하나 이상의 흰색 형광막에 해당하는 공간을 형성하고, 상기 공간에 감광성수지와 흰색 형광체를 혼합한 슬러리를 도포하고, 이것은 노광 및 현상하여 제조할 수 있다.In the forming process of the black matrix, a space corresponding to at least one white fluorescent film is formed inside the width, and a slurry in which the photosensitive resin and the white phosphor are mixed is applied to the space, which may 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-흰색 형광막110-white 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 2는 본 발명의 흰색 형광체를 포함하는 형광막이 형성된 글라스 패널의 내부 구성을 보여주고 있다.2 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 하나 이상의 흰색 형광막(110)에 의하여 길이 방향으로 분할되도록 하는 것을 특징으로 한다.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 It is characterized in that it is divided in the longitudinal direction by one or more white fluorescent film 110 inside the width of the matrix 108.
흰색 형광체는 Y2O2S:Tb 의 Tb 부활 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-activated 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 흰색 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, blue fluorescent film and white 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 부활 이트륨 계열의 흰색 형광체를 폴리비닐알콜 수용액에 중크롬산 나트륨을 혼합한 액에 현탁시킨 다음, 여기에 계면활성제를 소량 혼합하여 슬러리액을 만들고, 이것을 패널 내면에 전면 도포하고, 흰색 형광막의 패턴을 갖는 마스크를 이용하여 노광 및 현상하여 흰색 형광체의 형광막을 형성한다.Next, a Tb-activated yttrium-based white phosphor of Y 2 O 2 S: Tb is suspended in a solution of sodium dichromate mixed with an aqueous polyvinyl alcohol solution, and then a small amount of a surfactant is 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 white 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 흰색 형광막을 형성하므로써 휘도 향상을 도모할 수 있다.As described above, the present invention can improve the brightness by forming a separate white phosphor 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. have.
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