KR910008016B1 - Cleaning method for panel for color crt - Google Patents

Cleaning method for panel for color crt Download PDF

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KR910008016B1
KR910008016B1 KR1019890012395A KR890006068A KR910008016B1 KR 910008016 B1 KR910008016 B1 KR 910008016B1 KR 1019890012395 A KR1019890012395 A KR 1019890012395A KR 890006068 A KR890006068 A KR 890006068A KR 910008016 B1 KR910008016 B1 KR 910008016B1
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panel
phosphor
powder
fluorescent film
fluorescent
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KR1019890012395A
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Korean (ko)
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KR900019098A (en
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정수민
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삼성전관 주식회사
김정배
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    • 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
    • H01J9/38Exhausting, degassing, filling, or cleaning vessels

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Formation Of Various Coating Films On Cathode Ray Tubes And Lamps (AREA)
  • Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)

Abstract

내용 없음.No content.

Description

칼라음극선관의 형광막 제조방법Method for manufacturing fluorescent film of color cathode ray tube

제1a, b도는 종래 칼라음극선관의 형광막 제조방법에 있어서, 패널내면에 형광체 분말을 노즐로써 분사도포할 때에 형광체 분사영역을 나타내 보인 것임.1A and 1B show a phosphor spraying region when spraying a phosphor powder with a nozzle on an inner surface of a panel of a fluorescent film manufacturing method of a conventional color cathode ray tube.

제2a, b도는 본 발명에 의한 칼라음극선관의 형광막 제조 방법에 있어서, 패널내면에 형광체 분말을 노즐로써 분사도포할 때에 형광체 분사영역을 나타내 보인 것임.2A and 2B show a phosphor spraying region when the phosphor powder is spray-coated with a nozzle on the inner surface of the color cathode ray tube manufacturing method according to the present invention.

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

P : 음극선관의 패널 PT : 음극선관의 패널의 바닥면P: Panel of cathode ray tube PT: Bottom surface of panel of cathode ray tube

N : 형광체 분사용 노즐 A1, A2 : 형광체 분사영역N: phosphor injection nozzle A1, A2: phosphor injection area

본 발명은 칼라음극선관의 형광막 제조방법에 관한 것으로서, 상세하게는 패널의 바닥면에 감광성 수지층을 형성하여 이를 형광점의 형태로 노광한 후에 분말상의 형광체를 분사 도포하도록 하는 형광막 제조공정 중, 불균일한 형광체의 분사를 방지하여 균일한 형광막의 형성이 가능토록 한 형광막 제조방법에 관한 것이다.The present invention relates to a method for manufacturing a fluorescent film of a color cathode ray tube, and more particularly, to form a photosensitive resin layer on a bottom surface of a panel, and to expose it in the form of a fluorescent point, thereby spraying and applying a powdery phosphor. Among them, the present invention relates to a method for producing a fluorescent film, which enables the formation of a uniform fluorescent film by preventing the injection of non-uniform phosphors.

일반적인 형광막 제조방법에는, 패널에 도포된 형광체 슬러리를 직접 노광하여 소정형상의 형광점을 형성하도록 하는 슬러리 공법과, 블랙매트릭스가 형성된 패널의 내면에 감광성 수지를 도포한 후 이를 소정형상으로 감광하며 이어서 분말상의 형광체를 분사 도포한 후에 압축공기를 분사하여 현상하도록 하는 분체공법이 있는데, 후자의 분체공법은 공업용의 고정세 형광면을 형성하기에 매우 적합하여 점차 공업용 형광면 제조공정으로서 일반화되고 있는 것이다.In a general method of manufacturing a fluorescent film, a slurry method for directly exposing a phosphor slurry applied to a panel to form a fluorescent spot of a predetermined shape, and a photosensitive resin is applied to an inner surface of a panel on which a black matrix is formed, and then is exposed to a predetermined shape. Subsequently, there is a powder method in which compressed phosphors are sprayed and developed after spray coating powder powder. The latter powder method is very suitable for forming a high definition fluorescent surface for industrial use, and is gradually being generalized as an industrial fluorescent surface manufacturing process.

여기에서 형광체 분말을 이용한 형광면 형성방법을 살펴보면 다음과 같다.Herein, the fluorescent surface forming method using the phosphor powder is as follows.

블랙매트릭스가 형성된 패널의 내면에, 노광되었을 때에 점착성을 갖는 감광성 수지를 적정 두께로 도포한 후에 이를 건조한다. 그리고 이를 노광공정으로 옮겨 소정형상으로 노광한 후에 제1도에 도시된 상태하에서 패널바닥면(PT)에 형광체 분말을 분사도포한다. 그리고 패널(P)바닥면에 고압의 압축공기를 분사하여서 노광되지 않은 부위의 형광체, 즉 점착성을 띄지않은 부위에 도포된 형광체를 제거하도록 한다. 그리고 로딩제(Loading Agent)를 패널 바닥면(PT)에 도포하여 형광체입자가 패널(P)의 바닥면(PT)으로 침강되도록 한다. 그리고 침강이 완료된 후에는 로딩제 제거 작업을 수행하므로 한가지 색상의 형광막 도포공정을 완료한다.On the inner surface of the panel on which the black matrix is formed, a photosensitive resin having an adhesive property when exposed to light is applied to an appropriate thickness and then dried. Subsequently, the powder is sprayed onto the panel bottom surface PT under the state shown in FIG. Then, high pressure compressed air is sprayed onto the bottom surface of the panel P to remove phosphors on unexposed portions, that is, phosphors applied on non-tacky portions. And a loading agent (Loading Agent) is applied to the panel bottom surface (PT) so that the phosphor particles settle to the bottom surface (PT) of the panel (P). After the sedimentation is completed, the loading agent is removed, thereby completing the process of applying a fluorescent film of one color.

상기한 종래의 형광막 제조공정에 있어서, 형광체 분말은, 제1도에 도시된 바와 같이, 패널(P)의 전방에 위치된 분사노즐(N)에 의해서 분사되는데 분사되는 영역(A1)은 원형평면상이다. 이때 분사되는 형광체 입자의 밀도는 패널 중앙으로 갈수록 과밀하고 그 주위로 갈수록 희박하게 되는데 결과적으로 패널에 도포되는 형광막의 두께가 균일하게 되지 못하는 문제가 발생되는 것이다. 즉 패널의 중앙형광면의 두께가 그 주변형광면의 두께보다 두껍게 되는데 결과적으로 형광막 두께차에 의한 화상의 얼룩이 발생되고 나아가서는 고품위의 칼라음극선관의 제작이 어렵게 되는 것이다.In the above-described conventional fluorescent film production process, the phosphor powder is sprayed by the spray nozzle N located in front of the panel P, as shown in FIG. 1, and the sprayed region A1 is circular. Planar. In this case, the density of the phosphor particles to be sprayed becomes dense toward the center of the panel and becomes thinner around the panel. As a result, the thickness of the phosphor film applied to the panel is not uniform. In other words, the thickness of the central fluorescent surface of the panel becomes thicker than the thickness of the peripheral fluorescent surface, resulting in image unevenness due to the difference in the thickness of the fluorescent film, which makes it difficult to manufacture high quality color cathode ray tubes.

본 발명은 패널내면에 형광막을 균일하게 형성할 수 있어서 형광막 두께차에 의한 막얼룩을 방지하며 이로써 화질의 향상을 기할 수 있는 칼라음극선관의 형광막 제조방법을 제공함에 그 목적이 있다.An object of the present invention is to provide a method for manufacturing a fluorescent film of a color cathode ray tube which can form a fluorescent film uniformly on an inner surface of a panel to prevent film staining due to a difference in thickness of the fluorescent film, thereby improving image quality.

상기의 목적을 달성하기 위하여 본 발명은, 감광성 수지층이 형성된 패널의 바닥면에 분말 형광체를 분사 도포하여 형광막을 형성하는 분말 형광체 도포공정을 갖는 형광막 제조방법에 있어서, 상기의 분말 형광체가 분사되는 영역을 패널의 바닥면의 높이 또는 폭보다 작은 폭을 가지는 띠상으로 형성하도록 하여 이 분사영역을 패널 바닥면상을 수직 또는 수평방향으로 왕복 이동시킴으로써 패널의 전분할 영역에 분말 형광체가 고루 도포되도록 하는 점에 그 특징이 있다.In order to achieve the above object, the present invention is a fluorescent film production method having a powder phosphor coating step of forming a fluorescent film by spray-coating a powder phosphor on the bottom surface of the panel on which the photosensitive resin layer is formed, wherein the powder phosphor is sprayed The area of the panel is formed in a band shape having a width smaller than the height or width of the bottom surface of the panel so that the powdered phosphor is evenly applied to the starch region of the panel by reciprocating the sprayed area in the vertical or horizontal direction. It has that feature.

이하 첨부된 도면을 참조하면서 본 발명을 더욱 상세히 설명한다.Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

제2a, b도에 도시된 바와 같이 패널(P)의 전면에 형광체 분사용 노즐(N)이 위치되는데 이로부터 분사되는 영역(A2)은 패널(P)의 바닥면(PT)의 전체와 같은 크기를 갖는 것이 아니고, 수직방향으로 다수 분할된 바닥면(PT)의 일부 분할영역보다 길이가 약간 긴 정도의 크기를 갖는 것이다. 이때에 상기 노즐(N)이 수직방향으로 회동되므로 분사영역(A2)이 패널(P)의 바닥면(PT) 상하로 움직이게 되며 결과적으로 노즐(N)로부터의 형광체 분말이 패널(P)의 바닥면 전체에 도포되게 된다. 이와 같이 상태로 형광체가 도포되게 되면 패널 바닥면(PT)에 형성되는 형광막 두께가 고르게 된다. 이는 노즐(N)로부터의 형광체가 분사되는 과정에서 수직방향으로는 매우 좁고 수평방향으로는 넓은 분사영역(A2)으로 분출되기 때문에 형광체 분사밀도가 분사영역 전체에 걸쳐서 고르게 된다. 즉 수직방향으로는 그 폭자체가 워낙 좁기 때문에 밀도차가 발생한다 하여도 그 차가 미세하고, 나아가서는 그 방향으로 이동하면서 패널내면에 형광체가 도포되도록 되어 있기 때문에 그 차는 극히 감소된다. 또한 횡방향으로는 형광체 분말이 매우 넓은 폭으로 확산되기 때문에 그 확산력에 의해 형광체 분말이 밀도차 없이 주변부로 고루 펼쳐지게 되는데 결과적으로 중앙부위와 주변부위의 밀도차가 크게 저감된다.As shown in FIGS. 2A and 2B, the nozzle N for phosphor injection is located in front of the panel P, and the area A2 sprayed therefrom is the same as the entire bottom surface PT of the panel P. FIG. It does not have a size, but has a size that is slightly longer than a partial partition of the bottom surface PT divided in the vertical direction. At this time, since the nozzle N is rotated in the vertical direction, the spray area A2 moves up and down the bottom surface PT of the panel P. As a result, the phosphor powder from the nozzle N moves to the bottom of the panel P. It will be applied to the entire surface. When the phosphor is applied in this manner, the thickness of the phosphor film formed on the bottom surface of the panel PT is even. In the process of spraying the phosphor from the nozzle N, the phosphor is ejected into a very narrow vertical direction and a wide ejection area A2 in the horizontal direction, so that the phosphor ejection density is uniform throughout the ejection area. That is, even if the difference in density occurs because the width of the width is so narrow in the vertical direction, the difference is minute, and the difference is extremely reduced because the phosphor is applied to the inner surface of the panel while moving in the direction. In addition, since the phosphor powder is spread in a wide width in the transverse direction, the phosphor powder is spread evenly to the periphery without the difference in density by the diffusion force, and as a result, the density difference between the central portion and the peripheral portion is greatly reduced.

이와 같은 본 발명은, 위치고정된 상태에서 원형의 영역으로 형광체가 분사됨으로 야기되는 분사영역의 큰 밀도차를 줄이고자 하는 것인바, 결론적으로는 패널의 바닥면에 형성되는 형광막의 두께를 전체적으로 균일하게 하고자 하는 것이다. 이는 전기한 바와같이 패널의 바닥면을 분할된 영역으로 하여 이에 형광체를 확산분사 시킴으로 가능케되는 것이다. 이때에 형광체가 분사되는 형태를 마치 부채와 같은 형태로 하여 매우 엷고 넓게 분사영역을 갖도록 하면 더욱 효과적인 것이다. 이는 노즐로부터의 형광체를 가능한 큰 확산력으로서 분사하여 패널 바닥면에 대한 도포두께를 균일하게 하기 위한 것이다.The present invention is intended to reduce the large difference in density of the injection region caused by the injection of the phosphor into the circular region in a fixed position, and consequently the overall thickness of the fluorescent film formed on the bottom surface of the panel uniformly It is intended to be. This is made possible by diffusing the phosphor with the bottom surface of the panel as the divided area as described above. At this time, it is more effective if the phosphor is sprayed into a fan-like shape to have a very thin and wide spraying area. This is to inject the phosphor from the nozzle with as much diffusing force as possible to make the coating thickness uniform on the panel bottom.

이상에서와 같이 본 발명은 노즐로부터 분사되는 형광체의 분사영역 전체에 걸쳐서 고른 밀도를 갖게 하여 이로써 패널 바닥면에 도포되는 형광막을 두께를 고르게 할 수 있는 바, 형광막의 두께차에 의한 막얼룩을 제거하여 고품위의 화상을 가지는 음극선관을 제작할 수 있는 것이다.As described above, the present invention has an even density over the entire spraying area of the phosphor sprayed from the nozzle, thereby making the thickness of the fluorescent film applied to the bottom surface of the panel uniform, thereby removing film stains caused by the difference in thickness of the fluorescent film. In this way, a cathode ray tube having a high quality image can be produced.

Claims (1)

감광성 수지층이 형성된 패널(P)의 바닥면(PT)에 분말 형광체를 분사도포하도록 하는 분말 형광체 도포공정을 갖는 형광막 제조방법에 있어서, 상기의 형광막 도포공정 중에서 분말 형광체가 분사되는 분사영역(A2)을 패널(P)의 바닥면(PT)의 높이 또는 폭보다 작은 폭을 가지는 띠상으로 형성되도록 하여, 상기 분사영역(A2)을 상기 패널(P)의 바닥면(PT)을 수직 또는 수평방향으로 왕복 이동시키도록 하여서 상기 패널(P)의 바닥면(PT)전체에 분말 형광체가 고루 도포되도록 하는 것을 특징으로 하는 칼라음극선관의 형광막 제조방법.A fluorescent film manufacturing method having a powder phosphor coating step of spraying a powder phosphor onto a bottom surface PT of a panel P on which a photosensitive resin layer is formed, wherein the spraying area in which the powder phosphor is sprayed in the above-mentioned phosphor film applying step A2 is formed in a band shape having a width smaller than the height or width of the bottom surface PT of the panel P, so that the spraying area A2 is perpendicular to the bottom surface PT of the panel P. Method for producing a fluorescent film of a color cathode ray tube, characterized in that the powder phosphor is evenly applied to the entire bottom surface (PT) of the panel (P) by reciprocating in the horizontal direction.
KR1019890012395A 1989-05-06 1989-05-06 Cleaning method for panel for color crt KR910008016B1 (en)

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