KR19980073024A - Fluorescent Film Black Matrix Composition and Formation Method of Cathode Ray Tube - Google Patents
Fluorescent Film Black Matrix Composition and Formation Method of Cathode Ray Tube Download PDFInfo
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- KR19980073024A KR19980073024A KR1019970008078A KR19970008078A KR19980073024A KR 19980073024 A KR19980073024 A KR 19980073024A KR 1019970008078 A KR1019970008078 A KR 1019970008078A KR 19970008078 A KR19970008078 A KR 19970008078A KR 19980073024 A KR19980073024 A KR 19980073024A
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Abstract
본 발명은 음극선관의 형광막 블랙매트릭스 조성물 및 형성방법에 관한 것으로서, 특히 비발광부의 외부광 반사를 막아 음극선관의 콘트레스트를 향상시키는 블랙매트릭스층의 높이가 너무 낮게 형성됨에 따라 발생하는 전자빔의 확대를 방지하여 음극선관의 휘도, 퓨리티여유도, 그리고 지자계여유도를 향상시키도록 하는 데 그 목적이 있다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fluorescent film black matrix composition and a method of forming a cathode ray tube, and more particularly, to an electron beam generated when the height of a black matrix layer that prevents reflection of external light from a non-light emitting portion to improve the contrast of the cathode ray tube is made too low. The purpose is to improve the brightness, purity margin and geomagnetic margin of cathode ray tube by preventing expansion.
이러한 목적을 달성하기 위해 본 발명은 흑색으로 착색된 저융점 글라스 페이스트를 판넬 전면에 도포하고, 상기 판넬부를 450℃의 온도로 가열하여 10㎛ ∼ 25㎛ 높이의 블랙저융점글라스막을 형성한 후, 상기 블랙저융점글라스막 위에 내산성을 갖는 파지티브 감광제를 스핀코팅법에 의해 도포하고, 적, 녹, 청형광체 발광위치를 자외선광으로 노광하고, 순수로 현상한 후, 질산으로 에칭하여 블랙매트릭스층을 형성한 것이다.In order to achieve the above object, the present invention applies a low-melting-point glass paste colored in black to the entire surface of the panel, and heats the panel to a temperature of 450 ° C. to form a black low-melting-point glass film having a height of 10 μm to 25 μm, A positive photosensitive agent having acid resistance was applied on the black low melting point glass film by spin coating, the red, green, and blue phosphor light emitting positions were exposed to ultraviolet light, developed with pure water, and then etched with nitric acid to form a black matrix layer. It is formed.
Description
본 발명은 음극선관에 관한 것으로서, 특히 비발광부의 외부광 반사를 막아 음극선관의 콘트레스트를 향상시키는 블랙매트릭스층의 높이가 너무 낮게 형성됨에 따라 발생하는 전자빔의 확대를 방지하여 음극선관의 휘도, 퓨리티여유도, 그리고 지자계여유도를 향상시키도록 한 음극선관의 형광막 블랙매트릭스 조성물 및 형성방법에 관한 것이다.The present invention relates to a cathode ray tube, in particular, to prevent the expansion of the electron beam generated by the height of the black matrix layer is formed too low to prevent the reflection of the external light of the non-light emitting portion to improve the contrast of the cathode ray tube, the brightness of the cathode ray tube, The present invention relates to a fluorescent film black matrix composition and a method for forming a cathode ray tube to improve the purity margin and the geomagnetic margin.
일반적인 음극선관은 도 1 에 도시된 바와 같이, 내측면에 R, G, B의 형광막(1)이 도포되어 있는 판넬(2)과, 상기 판넬(2)의 후단에 융착되어진 펀넬(3)과, 상기 펀넬(3)의 네크부(4)에 봉입되는 전자총(5)과, 상기 전자총(5)으로부터 방사된 전자빔(6)이 형광막(1)의 전체면을 타격시킬 수 있도록 전자빔(6)을 수평 또는 수직으로 편향시키는 편향요크(7)와, 상기 판넬(2)의 내측에 장착되며 편향요크(7)에 의해 편향된 전자빔(6)이 통과하도록 다수의 구멍이 형성된 섀도우마스크(8)와, 상기 섀도우마스크(8)를 판넬(2)면에 지지하는 프레임(9)과, 상기 프레임(9)에 결합되어 외부자계를 차폐하는 인너쉴드(10)로 구성하였다.As shown in FIG. 1, a general cathode ray tube includes a panel 2 having R, G, and B fluorescent films 1 coated on an inner surface thereof, and a funnel 3 fused to a rear end of the panel 2. And the electron gun 5 enclosed in the neck portion 4 of the funnel 3 and the electron beam 6 radiated from the electron gun 5 so as to strike the entire surface of the fluorescent film 1. Shadow mask (8) for deflecting 6) horizontally or vertically, and a shadow mask (8) mounted inside the panel (2) and formed with a plurality of holes through which the electron beam (6) deflected by the deflection yoke (7) passes. ), A frame 9 supporting the shadow mask 8 on the panel 2 surface, and an inner shield 10 coupled to the frame 9 to shield an external magnetic field.
그리고, 상기 형광막(1)의 구성은 도 2 와 같이, 판넬(2) 상면에 흑연으로 이루어진 외부광 흡수막인 블랙매트릭스층(11)을 사진감광법에 의해 형성하고, 그 위에 녹색 형광체슬러리(형광체 + 감광제 + 계면활성제)를 도포한 후 건조, 노광, 현상을 거쳐 녹색형광막(1a)을 형성하였다.In the configuration of the fluorescent film 1, as shown in FIG. 2, a black matrix layer 11, which is an external light absorbing film made of graphite, is formed on the upper surface of the panel 2 by a photosensitive method, and a green phosphor slurry is formed thereon. After applying (phosphor + photosensitive agent + surfactant), the green fluorescent film 1a was formed through drying, exposure, and image development.
동일한 방법으로 적, 청색형광막(1b, 1c)을 형성한 후 전자빔(6)이 형광막(1)에 충돌한 후 발생하는 2차 전자 및 후면으로 발광된 광을 음극선관의 전면부로 반사하도록 금속반사막인 알루미늄막(12)을 형성하게 되는데, 상기 알루미늄막(12)을 평활하게 형성시키기 위해 수지막(13)을 먼저 형성시킨 후 알루미늄을 진공증착시켜 알루미늄막(12)을 형성함으로써 음극선관의 형광막(1)을 완성하였다.In the same manner, after forming the red and blue fluorescent films 1b and 1c, the secondary electrons and the rear light generated after the electron beam 6 collides with the fluorescent film 1 are reflected to the front part of the cathode ray tube. An aluminum film 12, which is a metal reflective film, is formed. In order to form the aluminum film 12 smoothly, a resin film 13 is first formed, and then aluminum is vacuum-deposited to form an aluminum film 12 to form a cathode ray tube. The fluorescent film 1 was completed.
이와 같이 구성된 종래의 음극선관에 전원이 인가되면 전자총(5)으로부터 전자빔(6)이 방사되고, 상기 전자총(5)으로부터 방사된 전자빔(6)은 섀도우마스크(7)의 슬롯을 통과하여 색선별이 이루어진 상태에서 판넬(2)면 블랙매트릭스층(11) 사이의 형광막(1)을 타격하게 되어 화상이 재현된다.When power is applied to the conventional cathode ray tube configured as described above, the electron beam 6 is radiated from the electron gun 5, and the electron beam 6 radiated from the electron gun 5 passes through the slot of the shadow mask 7 to discriminate color. In this state, the panel 2 hits the fluorescent film 1 between the black matrix layers 11 to reproduce an image.
이때, 상기 블랙매트릭스층(11)은 비발광부의 외부광 반사를 막아 음극선관의 콘트라스트를 향상시키고, 비발광부의 형광체 발광을 차단하여 퓨리티를 향상시키는 역할을 하게 된다.In this case, the black matrix layer 11 prevents reflection of external light from the non-light emitting part to improve contrast of the cathode ray tube, and serves to improve purity by blocking phosphor emission of the non-light emitting part.
그러나 이러한 종래 음극선관의 블랙매트릭스층은 도 3 과 같이, 그 위에 형성되는 적, 녹, 청의 형광체막과 두께차이가 크게 발생하게 되고, 형광체의 입도가 크기 때문에 수지막이 평탄하게 도포되지 않으므로 알루미늄막이 평탄하게 형성되기 어렵게 되어 음극선관 휘도저하의 원인이 되며, 도 4 와 같이 알루미늄막과 블랙매트릭스층의 큰 간격(gap)차로 인해 빔확대율이 증가하여 퓨리티여유도 및 지자계여유도가 저하되므로 전자빔에 의한 타색 침범이 발생하게 되어 음극선관의 색순도를 떨어뜨리게 되는 문제점이 있었다.However, the black matrix layer of the conventional cathode ray tube has a large thickness difference with the red, green, and blue phosphor films formed thereon, as shown in FIG. 3, and the resin film is not applied flatly because the particle size of the phosphor is large. It becomes difficult to be formed flat, which causes a decrease in the brightness of the cathode ray tube. As shown in FIG. 4, the beam enlargement rate increases due to the large gap between the aluminum film and the black matrix layer, and thus the purity margin and the geomagnetic field margin decrease. There was a problem in that the color violations of the cathode ray tube is reduced by the occurrence of invasion of color.
첨부된 도 4 중 실선은 확대되어 판넬내면에 형성된 전자빔(6') 형상이고, 점선은 실제 알루미늄막을 투과한 전자빔(6) 형상이다.In FIG. 4, the solid line is enlarged to form an electron beam 6 ′ formed on the inner surface of the panel, and the dotted line is actually an electron beam 6 penetrating the aluminum film.
본 발명은 이러한 점을 감안하여 블랙매트릭스층을 흑연이 아닌 흑색으로 착색된 저융점글라스를 이용하여 종래의 블랙매트릭스층 높이의 약 20배 정도인 20㎛정도의 두께로 구성함으로써 알루미늄막을 평탄하게 형성하도록 하여 음극선관의 휘도를 증가시키고, 블랙매트릭스층과 알루미늄막의 간격차이를 최소화하여 전자빔의 확대를 방지하고, 이를 통해 퓨리티여유도 및 지자계여유도를 향상시켜 사용자에게 고화질의 화상을 제공하는 데 그 목적이 있다.In view of the above, the present invention uses a low melting glass colored in black, not graphite, to form an aluminum film by forming a thickness of about 20 μm, which is about 20 times the height of a conventional black matrix layer. It is possible to increase the brightness of cathode ray tube and to minimize the gap between black matrix layer and aluminum film to prevent the expansion of electron beam, and to improve the purity margin and geomagnetic margin, thereby providing users with high quality images. The purpose is.
도 1 은 일반적인 음극선관의 구성도.1 is a block diagram of a typical cathode ray tube.
도 2 는 종래 음극선관의 판넬부 구성도.2 is a block diagram of a conventional cathode ray tube.
도 3 는 종래 음극선관의 판넬부 수지막의 형성을 나타낸 단면도.3 is a cross-sectional view showing the formation of a panel resin film of a conventional cathode ray tube.
도 4 은 종래 음극선관 전자빔의 형광막 타격에 따른 빔확대를 나타낸 것으로서,Figure 4 shows the beam enlargement according to the blow of the fluorescent film of the conventional cathode ray tube electron beam,
(가)는 판넬부 단면도.(A) Sectional section of the panel.
(나)는 블랙매트릭스층 단면도.(B) is sectional drawing of black matrix layer.
도 5 는 본 발명 음극선관의 판넬부 구성도.5 is a block diagram of a panel portion of the present invention cathode ray tube.
도 6 은 본 발명 음극선관의 형광막 형성도로서,6 is a diagram showing the formation of a fluorescent film of the cathode ray tube of the present invention,
(가)는 저융점 글라스의 도포.(A) Application of low melting point glass.
(나)는 고온하에서 막형성.(B) film formation under high temperature.
(다)는 파지티브 포토레지스터 도포.(C) application of positive photoresist.
(라)는 노광.(D) exposure.
(마)는 현상.(E) phenomenon.
(바)는 에칭.(Bar) etching.
(사)는 녹색 형광체슬러리의 도포.(G) application of green phosphor slurry.
(아)는 노광.(A) is exposure.
(자)는 현상.The phenomenon is.
(차)는 최종 녹, 청, 적 형광막의 형성.(D) is the formation of the final rust, blue, red fluorescent film.
도 7 은 본 발명 음극선관의 판넬부 수직막의 형성을 나타낸 단면도.Figure 7 is a cross-sectional view showing the formation of the panel vertical membrane of the cathode ray tube of the present invention.
도 8 은 본 발명 음극선관 전자빔의 형광막 타격을 나타낸 것으로서,8 shows the blow of the fluorescent film of the cathode ray tube electron beam of the present invention,
(가)는 판넬부 단면도.(A) Sectional section of the panel.
(나)는 블랙매트릭스층 단면도.(B) is sectional drawing of black matrix layer.
도면의 주요 부분에 대한 부호의 설명Explanation of symbols for the main parts of the drawings
101 : 판넬 102 : 블랙매트릭스층101: panel 102: black matrix layer
103 : 형광막 103a : 적색형광막103: fluorescent film 103a: red fluorescent film
103b : 녹색형광막 103c : 청색형광막103b: green fluorescent film 103c: blue fluorescent film
104 : 저융점글라스 105 : 블랙저융점글라스막104: low melting glass 105: black low melting glass
106 : 파지피브 감광제 107 : 녹색 형광체슬러리106: phage five photosensitive agent 107: green phosphor slurry
108 : 알루미늄막 109 : 수지막108: aluminum film 109: resin film
110 : 전자빔110: electron beam
본 발명을 첨부한 도면에 의거하여 상세히 설명하면 다음과 같다.The present invention will be described in detail with reference to the accompanying drawings.
도 5 는 본 발명에 의한 음극선관의 판넬부 구성도를 나타낸 것으로서, 판넬(101) 전면에 종래 블랙매트릭스층(10) 높이의 약 20배 정도의 높이를 갖는 블랙매트릭스층(102)이 형성되고, 상기 블랙매트릭스층(102)의 사이에는 적형광막(103a), 녹형광막(103b), 청형광막(103c)으로 이루어진 형광막(103)이 형성된다.FIG. 5 illustrates a panel configuration of the cathode ray tube according to the present invention, and a black matrix layer 102 having a height of about 20 times the height of the conventional black matrix layer 10 is formed on the front surface of the panel 101. The fluorescent film 103 including the red fluorescent film 103a, the green fluorescent film 103b, and the blue fluorescent film 103c is formed between the black matrix layers 102.
상기 블랙매트릭스층(102)은 종래의 높이 보다 약 20배 정도 높게 구성하게 되는데, 종래의 주재료이던 흑연의 경우 입자의 크기가 작아 두께를 크게 할 수 없는 단점이 있고, 다층으로 형성하게 되면 제조공정이 복잡해져 생산성이 저하되고, 제조원가가 상승하는 단점이 있어 흑색으로 착색된 저융점글라스(104)를 이용하여 구성한다.The black matrix layer 102 is configured to be about 20 times higher than the conventional height. Graphite, which is a conventional main material, has a disadvantage in that the size of the particles is small and the thickness cannot be increased. This complexity has a disadvantage in that productivity is lowered and manufacturing cost is increased, and thus the low melting glass 104 colored in black is used.
이러한 음극선관의 형광막 형성방법을 도 6 에 의해 상세히 설명하면 다음과 같다.A method of forming a fluorescent film of such a cathode ray tube will be described in detail with reference to FIG. 6 as follows.
먼저, 흑색으로 착색된 저융점글라스(104) 페이스트를 실크스크린법에 의해 판넬(101) 전면에 20㎛ ∼ 30㎛정도의 두께로 도포하고, 상기 판넬(101)부를 450℃ 정도의 온도로 가열하여 약 20㎛정도 높이의 블랙저융점글라스막(105)을 형성한 후, 상기 블랙저융점글라스막(105) 위에 내산성을 갖는 파지티브 감광제(106)를 스핀코팅법에 의해 도포하고, 적, 녹, 청형광체 발광위치를 자외선광으로 노광하고, 순수로 현상한 후, 질산으로 에칭하여 블랙매트릭스층(102)을 형성한다.First, the low-melting-point glass 104 paste colored in black is applied to the entire surface of the panel 101 by the silk screen method with a thickness of about 20 μm to 30 μm, and the panel 101 is heated to a temperature of about 450 ° C. To form a black low melting glass film 105 having a height of about 20 μm, and then a positive photoresist 106 having acid resistance is applied on the black low melting glass film 105 by spin coating. The green and blue phosphor light emitting positions are exposed with ultraviolet light, developed with pure water, and then etched with nitric acid to form a black matrix layer 102.
이와 같이 약 20㎛ 정도의 두께를 갖는 블랙매트릭스층(102)이 형성된 판넬(101)면에 녹색형광체슬러리(107)를 도포, 건조 후 녹색발광위치를 노광, 현상하여 녹색형광막(103b)을 형성하고, 같은 방법으로 청색형광막(103c)과 적색형광막(103a)을 형성한다.As such, the green phosphor slurry 107 is applied to the surface of the panel 101 on which the black matrix layer 102 having a thickness of about 20 μm is formed, and the green phosphor position is exposed and developed to dry the green phosphor film 103b. The blue fluorescent film 103c and the red fluorescent film 103a are formed in the same manner.
상기 적, 녹, 청형광막(103a, 102b, 103c)을 형성한 후 음극선관에서 전자빔이 형광막(103)에 충돌 후 발생하는 2차 전자 및 후면으로 발광된 광을 음극선관의 전면부로 반사시키도록 금속반사막인 알루미늄막(108)을 형성하게 되는데, 상기 알루미늄막(108)을 평탄하게 형성하기 위해 수지막(109)을 먼저 형성한 후 알루미늄막(108)을 진공증착에 의해 형성하여 음극선관의 형광막 형성을 완료한다.After the red, green, and blue fluorescent films 103a, 102b, and 103c are formed, the secondary electrons and the rear light generated after the electron beam collides with the fluorescent film 103 in the cathode ray tube are reflected to the front portion of the cathode ray tube. An aluminum film 108, which is a metal reflective film, is formed. In order to form the aluminum film 108 flatly, a resin film 109 is first formed, and then the aluminum film 108 is formed by vacuum deposition. Complete the fluorescent film formation of the tube.
이와 같이 구성된 음극선관에 전원이 인가되면 전자총(도면상에 미도시)으로부터 전자빔(110)이 방사되고, 이러한 전자빔(110)은 형광막(103)을 타격하게 되어 화상이 재현된다.When power is applied to the cathode ray tube configured as described above, the electron beam 110 is emitted from an electron gun (not shown in the drawing), and the electron beam 110 strikes the fluorescent film 103 to reproduce an image.
이때, 상기 형광막(103)의 블랙매트릭스층(102)을 20㎛정도의 높이로 구성하게 되어 도 7 과 같이 알루미늄막(108)의 평탄화를 위해 도포되는 수지막(109)을 평탄하게 구성할 수 있게 되므로 음극선관의 휘도특성을 향상시키게 되고, 도 8 과 같이 상기 알루미늄막(108)과 블랙매트릭스층(102)의 간격차이가 최소화되어 형광막(103)을 타격한 전자빔(110) 중 측면으로 발광하는 광 또는 후면부로 발광하는 광이 알루미늄막(108)에 의해 판넬(101)부의 전면부로 다시 반사될 때 발생하게 되는 빔의 확대를 방지하게 되므로 음극선관의 퓨리티여유도 및 지자계여유도가 크게 향상되어 고화질의 화상을 얻을 수 있게 되는 것이다.In this case, the black matrix layer 102 of the fluorescent film 103 is configured to have a height of about 20 μm, so that the resin film 109 applied for the planarization of the aluminum film 108 may be flat as shown in FIG. 7. Since it is possible to improve the brightness characteristics of the cathode ray tube, the gap between the aluminum film 108 and the black matrix layer 102 is minimized as shown in Figure 8 side of the electron beam 110 hit the fluorescent film 103 Since the light emitted by the light emitted to the rear portion or the light emitted to the rear portion is reflected back to the front portion of the panel 101 by the aluminum film 108 to prevent the expansion of the beam, the purity of the cathode ray tube and the magnetic field margin Is greatly improved to obtain a high quality image.
이상에서 설명한 바와 같이 본 발명은 형광막의 형성시 블랙매트릭스층을 흑색으로 착색된 저융점글라스를 이용하여 종래 높이의 약 20배 정도인 20㎛ 정도의 두께로 구성함으로써 수지막을 평탄하게 형성할 수 있게 되어 음극선관의 휘도가 향상되고, 블랙매트릭스층과 알루미늄막의 간격차이가 최소화되므로 전자빔의 확대를 방지하게 되어 음극선관의 퓨리티여유도 및 지자계여유도가 향상되는 효과가 있다.As described above, in the present invention, when forming the fluorescent film, the black matrix layer is formed to have a thickness of about 20 μm, which is about 20 times the conventional height, by using a low melting point glass colored in black so that the resin film can be formed flat. Therefore, the brightness of the cathode ray tube is improved, and the gap between the black matrix layer and the aluminum film is minimized, thereby preventing the expansion of the electron beam, thereby improving the purity margin and the geomagnetic margin of the cathode ray tube.
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KR20040011855A (en) * | 2002-07-31 | 2004-02-11 | 엘지.필립스디스플레이(주) | A Etching Solution for Constructing Black Matrix of Color CRT |
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KR20040011855A (en) * | 2002-07-31 | 2004-02-11 | 엘지.필립스디스플레이(주) | A Etching Solution for Constructing Black Matrix of Color CRT |
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