KR100250196B1 - Method for forming a fluorescent film - Google Patents

Method for forming a fluorescent film Download PDF

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Publication number
KR100250196B1
KR100250196B1 KR1019970035831A KR19970035831A KR100250196B1 KR 100250196 B1 KR100250196 B1 KR 100250196B1 KR 1019970035831 A KR1019970035831 A KR 1019970035831A KR 19970035831 A KR19970035831 A KR 19970035831A KR 100250196 B1 KR100250196 B1 KR 100250196B1
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South Korea
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fluorescent film
fluorescent
forming
film
heater
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KR1019970035831A
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Korean (ko)
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KR19990012440A (en
Inventor
이금식
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박현승
유아전자주식회사
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    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J1/00—Details of electrodes, of magnetic control means, of screens, or of the mounting or spacing thereof, common to two or more basic types of discharge tubes or lamps
    • H01J1/54—Screens on or from which an image or pattern is formed, picked-up, converted, or stored; Luminescent coatings on vessels
    • H01J1/62—Luminescent screens; Selection of materials for luminescent coatings on vessels
    • H01J1/66—Supports for luminescent material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J1/00—Details of electrodes, of magnetic control means, of screens, or of the mounting or spacing thereof, common to two or more basic types of discharge tubes or lamps
    • H01J1/54—Screens on or from which an image or pattern is formed, picked-up, converted, or stored; Luminescent coatings on vessels
    • H01J1/62—Luminescent screens; Selection of materials for luminescent coatings on vessels
    • H01J1/72—Luminescent screens; Selection of materials for luminescent coatings on vessels with luminescent material discontinuously arranged, e.g. in dots or lines
    • H01J1/74—Luminescent screens; Selection of materials for luminescent coatings on vessels with luminescent material discontinuously arranged, e.g. in dots or lines with adjacent dots or lines of different luminescent material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J5/00—Details relating to vessels or to leading-in conductors common to two or more basic types of discharge tubes or lamps
    • H01J5/02—Vessels; Containers; Shields associated therewith; Vacuum locks
    • H01J5/04—Vessels or containers characterised by the material thereof

Abstract

PURPOSE: A method for forming a fluorescent film is provided to improve productivity by simplifying the progress for forming the fluorescent material and to gain a VFD(vacuum fluorescent display device) with the high resolution by reducing the size of the pixel. CONSTITUTION: In a method for forming a fluorescent film, a glass board(11), metal wires(13), a fluorescent film(15), a glass container(16), a heater(17) and a control grid(18) are included. The metal wires(13) are prepared and the R(red), G(green), B(blue) fluorescent materials are applied on the metal wires and the fluorescent film(15) is formed. The metal wires(13) are sticked on the glass board(11). The heater(17) and the control grid(18) are arranged and the exterior is covered by the glass container(16). After the progress of knocking, the inside of the glass container(16) is ventilated with vacuum.

Description

형광막 형성방법Fluorescence film formation method

본 발명은 평판표시소자에 관한 것으로서, 특히 진공 형광 표시소자(vacuum fluorescent display device: 이하, VFD라 약칭한다)의 형광체 형성방법에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flat panel display device, and more particularly, to a method of forming a phosphor of a vacuum fluorescent display device (hereinafter, abbreviated as VFD).

일반적으로 표시소자는 각종 장치에서 발생되는 여러가지 전기적인 정보를 시각정보로 변화시켜 전달하는 소자로써, 투사(projection)형, 직시(direct view)형 및 오프스크린(off screen)형으로 크게 구분되고, 그중 직시형은 음극선관(CRT) 및 평면 표시소자로 구분되며 특히, 평면 표시소자는 발광형(Emitter) 및 비발광형(non emitter)으로 세분화되는데, 상기 VFD는 발광형에 속하는 평면 표시소자이다.In general, the display device is a device that changes and transmits various electrical information generated by various devices into visual information, and is largely classified into a projection type, a direct view type, and an off screen type. Among them, the direct view type is classified into a cathode ray tube (CRT) and a flat display element, and in particular, the flat display element is subdivided into an emitter and a non-emitter. The VFD is a flat display element belonging to a light emitting type. .

이때 발광형 평면 표시소자인 VFD는 히터(heater), 애노드(anode), 격자전극에 해당하는 콘트롤 그리드(grid), 형광막 등으로 구성되어, 상기 히터에 일정레벨이상의 전압이 인가되어 열전자를 방출하면 포지티브(+)전극인 애노드가 이를 흡수하고 애노드 상부에 형성된 형광막의 R(Red), G(Green), B(Blue) 형광체가 각각 발광함으로써 소정의 데이터를 디스플레이 한다.In this case, VFD, a light emitting display device, is composed of a heater, an anode, a control grid corresponding to a grid electrode, a fluorescent film, and the like, and a voltage of a predetermined level or more is applied to the heater to emit hot electrons. The anode, which is a positive (+) electrode, absorbs it and the R (Red), G (Green), and B (Blue) phosphors of the fluorescent film formed on the anode emit light, respectively, to display predetermined data.

이하, 종래의 기술에 따른 평판 표시소자의 제조방법을 도 1a 내지 도 1e를 참조하여 설명한다.Hereinafter, a method of manufacturing a flat panel display device according to the related art will be described with reference to FIGS. 1A to 1E.

도 1a 내지 도 1e는 종래의 기술에 따른 VFD의 제조방법을 개략적으로 보여주는 공정순서도이다.1A to 1E are process flowcharts schematically showing a method of manufacturing a VFD according to the related art.

먼저, 도 1a와 같이, 유리기판(1) 상부의 소정영역에 흑색안료가 첨가된 절연물질을 증착하여 일정한 패턴을 가진 블랙 매트릭스(black matrix)(2)를 형성한다. 상기 블랙 매트릭스(2)는 차후에 형성될 인접한 셀들과의 색구분뿐만아니라 차광 역할을 한다.First, as shown in FIG. 1A, a black matrix 2 having a predetermined pattern is formed by depositing an insulating material to which black pigment is added to a predetermined region on the glass substrate 1. The black matrix 2 serves as a light shielding as well as color classification with adjacent cells to be formed later.

이어서 도 1b와 같이, 블랙 매트릭스(2)를 제외한 유리기판(1) 상부에 금속물질인 은(Ag)을 스크린 인쇄하여 일정한 패턴을 가진 애노드전극(3)을 형성한다.Subsequently, as shown in FIG. 1B, silver (Ag), which is a metal material, is screen printed on the glass substrate 1 except for the black matrix 2 to form an anode electrode 3 having a predetermined pattern.

그리고 도 1c와 같이, 상기 블랙 매트릭스(2)상에 형광물질이 도포되지 않도록 소정형상의 마스크(4)를 설치하고 R, G, B 형광물질을 각각의 정해진 위치에 정해진 순서에 따라 도포하면 도 1d와 같이 애노드전극(3)상에 R, G, B 순으로 배열된 형광막(5)이 형성된다. 이때 각각의 R, G, B의 형광막(5)이 모여 화상을 구성하는 기본단위 즉, 화소(Pixel)를 이룬다.In addition, as shown in FIG. 1C, a mask 4 having a predetermined shape is installed to prevent the fluorescent material from being applied onto the black matrix 2, and R, G, and B fluorescent materials are applied to each of the predetermined positions in a predetermined order. As in 1d, the fluorescent film 5 arranged in the order of R, G, and B is formed on the anode electrode 3. At this time, the fluorescent film 5 of each of R, G, and B gathers to form a basic unit constituting an image, that is, a pixel.

이어서 도 1e와 같이, 상기한 구조의 전면에 그 이외의 각종 공정을 거쳐 히터(7), 콘트롤 그리드(8)를 배치하고 유리용기(6)로 외관을 덮어서 내부를 진공상태로 만들면 VFD가 얻어진다.Subsequently, as shown in FIG. 1E, the heater 7 and the control grid 8 are disposed on the front surface of the structure through various other processes, and the inside is vacuumed by covering the exterior with the glass container 6 to obtain the VFD. Lose.

이와 같은 공정을 거쳐 제조된 종래의 기술에 따른 VFD의 동작을 개략적으로 살펴보면 다음과 같다.Looking at the operation of the VFD according to the prior art manufactured through such a process as follows.

먼저, 에노드전극(3)에 수평동기신호 및 영상신호를 인가하고 컨트롤 그리드(8)에 수직동기신호를 인가하며 히터(7)에 음(-)전위를 인가하면 상기 히터(7)에서 열전자가 방출된다.First, when a horizontal synchronous signal and an image signal are applied to the anode electrode 3, a vertical synchronous signal is applied to the control grid 8, and a negative (−) potential is applied to the heater 7, hot electrons are generated by the heater 7. Is released.

그리고 상기 히터(7)에서 방출된 열전자는 콘트롤 그리드(8)의 전위차에 따라 그 양이 가감된다.The amount of hot electrons emitted from the heater 7 is added or subtracted according to the potential difference of the control grid 8.

이어서 콘트롤 그리드(8)에 의해 그 양이 조절된 열전자는 상기 수평동기신호 및 수직동기신호가 동기될 때 포지티브(+)전극인 에노드전극(3)으로 흡수되고 에노드전극(3)상에 형성된 형광막(5)에 충돌하여 발광함에 따라 입력된 영상신호에 상응하는 소정의 정보가 디스플레이된다. 이때 영상신호의 레벨에 따라 화면의 밝기가 조정된다.Then, the thermoelectrics whose amount is controlled by the control grid 8 are absorbed by the anode electrode 3 which is a positive electrode when the horizontal synchronizing signal and the vertical synchronizing signal are synchronized with each other, and on the anode electrode 3. Predetermined information corresponding to the input video signal is displayed as the light hits the formed fluorescent film 5. At this time, the brightness of the screen is adjusted according to the level of the video signal.

이와 같이 구성되어 동작되는 종래의 기술에 따른 VFD의 형광막 형성방법은 애노드전극을 스크린 인쇄방법으로 증착시킨 다음 마스크를 이용하여 형광막을 형성하므로 공정이 다소 복잡하고, 인쇄공정의 특성상 화소의 크기를 일정수준 이하로 감소시키기 어렵기때문에 화질향상 측면에서 커다란 장해요소로 작용하는 문제점이 있다.VFD fluorescent film formation method according to the prior art that is configured and operated as described above is deposited by the anode electrode by the screen printing method, and then formed a fluorescent film using a mask, the process is somewhat complicated, and the size of the pixel due to the characteristics of the printing process Since it is difficult to reduce below a certain level, there is a problem that acts as a major obstacle in terms of image quality improvement.

따라서 본 발명은 상기한 종래의 제반 문제점을 해결하기 위하여 안출한 것으로서, 본 발명의 목적은 형광체 형성공정을 간소화하고 화질을 향상시킬 수 있도록 한 형광막 형성방법을 제공함에 있다.Accordingly, the present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to provide a method for forming a fluorescent film which can simplify the phosphor forming process and improve image quality.

도 1a 내지 도 1e는 종래의 기술에 따른 VFD의 제조방법을 개략적으로 보여주는 공정순서도1a to 1e is a process flow diagram schematically showing a method of manufacturing a VFD according to the prior art

도 2a 내지 도 2c는 본 발명에 따른 VFD의 형광막 형성방법을 보여주는 공정순서도2a to 2c is a process flowchart showing a method of forming a fluorescent film of VFD according to the present invention

도면의 주요부분에 대한 부호의 설명Explanation of symbols for main parts of the drawings

1, 11 : 유리기판 2 : 블랙매트릭스1, 11: glass substrate 2: black matrix

3, 13 : 애노드전극 4 : 마스크3, 13 anode electrode 4: mask

5, 15 : 형광막 6,16 : 유리용기5, 15: fluorescent film 6, 16: glass container

7, 17 : 히터 8, 18 : 컨트롤그리드7, 17: heater 8, 18: control grid

상기한 목적을 달성하기 위한 본 발명은 박막 와이어들을 소정의 개수만큼 준비하는 단계와, 상기 박막 와이어들에 R, G, B 형광체 페이스트들을 도포하여 형광막을 형성한후 소성하는 단계와, 상기 단계후 준비된 기판상에 상기 박막 와이어를 원하는 수평 해상도의 개수만큼 접착하는 단계를 포함하여 이루어진 형광막 형성방법을 특징으로 한다.According to an aspect of the present invention, there is provided a method of preparing a predetermined number of thin film wires, applying R, G, and B phosphor pastes to the thin film wires to form a fluorescent film, and then firing the same. And bonding the thin film wire to the prepared substrate by a desired number of horizontal resolutions.

이하, 본 발명에 따른 형광막 형성방법의 바람직한 일 실시예를 첨부한 도면을 참조하여 상세히 설명한다.Hereinafter, with reference to the accompanying drawings a preferred embodiment of the method for forming a fluorescent film according to the present invention will be described in detail.

도 2a 내지 도 2c는 본 발명에 따른 VFD의 형광막 형성방법을 보여주는 공정순서도이다.2A to 2C are flowcharts showing a method of forming a fluorescent film of VFD according to the present invention.

본 발명에 따른 VFD의 형광막 형성방법은 먼저, 제작하고자 하는 평면 표시장치의 해상도 수 만큼의 금속와이어를 준비한다. 이때 상기 해상도는 300라인 이상이므로 적어도 300개 이상 준비하고, 금속 와이어는 은(Ag)와이어를 사용한다. 이어서 셀룰로오스(cellulose)+ 아크릴 도료(acrylic resin)+유기 용제(알콜 또는 에스테르)로 구성되는 형광체 페이스트를 준비한다.In the method of forming a fluorescent film of the VFD according to the present invention, first, metal wires are prepared as many as the resolution of the flat display device to be manufactured. At this time, since the resolution is 300 lines or more, at least 300 or more are prepared, and the metal wire is silver (Ag) wire. Subsequently, a phosphor paste composed of cellulose + acrylic resin + organic solvent (alcohol or ester) is prepared.

상기와 같이 준비된 금속 와이어들을 소정의 지그(jig)에 배열하고 상기 형광체 페이스트를 스프레이 도포법, 페이스트 전착법, 안료 도장법, 초고주파 증착법중 어느 하나를 이용하여 도포하고 400∼600℃의 온도에서 소성시키면 10∼20μm 두께의 형광체막(15)이 형성된다.The metal wires prepared as described above are arranged in a predetermined jig, and the phosphor paste is applied by any one of a spray coating method, a paste electrodeposition method, a pigment coating method, and an ultra-high frequency vapor deposition method and fired at a temperature of 400 to 600 ° C. A phosphor film 15 having a thickness of 10 to 20 µm is formed.

여기서 스프레이 도포법은 금속 와이어(13)에 R, G, B 형광체를 순차적으로 분사한후 퍼니스에서 소성하면 소정 두께의 R, G, B 형광막(15)이 얻어진다. 또한 페이스트 전착법은 상기한 R, G, B 형광체 페이스트를 금속 와이어(13)에 전착하면 소정 두께로 피막된 R, G, B 형광막(15)이 얻어진다. 마찬가지로 초고주파 증착법에 의해 형광체 안료를 금속 와이어(13)에 직접 증착하면 소정 두께의 R, G, B 형광막(15)이 얻어진다.In the spray coating method, R, G, and B phosphors are sequentially sprayed onto the metal wire 13 and then fired in a furnace to obtain R, G, and B fluorescent films 15 having a predetermined thickness. In the paste electrodeposition method, when the above-mentioned R, G, B phosphor paste is electrodeposited on the metal wire 13, the R, G, B fluorescent film 15 coated with a predetermined thickness is obtained. Similarly, when the phosphor pigment is directly deposited on the metal wire 13 by the ultra-high frequency vapor deposition method, R, G, and B fluorescent films 15 having a predetermined thickness are obtained.

다음 도 2b와 같이 상기한 공정에 의해 R, G, B 형광막이 형성된 금속 와이어(13)들을 준비된 글래스 기판(11)상에 원하는 수평 해상도의 개수만큼 접착한다. 이때 상기 유리 기판(11)은 고강도의 소다라임(soda lime) 글래스를 사용한다.Next, as shown in FIG. 2B, the metal wires 13 on which the R, G, and B fluorescent films are formed are bonded to the prepared glass substrate 11 by the number of desired horizontal resolutions. In this case, the glass substrate 11 uses high-strength soda lime glass.

그 다음 도 2c와 같이 히터(17), 콘트롤 그리드(18)를 각각 배치하여 유리용기(16)로 외관을 덮고 노킹공정후 유리용기(16)의 내부를 진공 배기하면 본 발명에 따른 VFD의 제조가 완료된다.Then, as shown in FIG. 2C, the heater 17 and the control grid 18 are disposed to cover the exterior with the glass container 16, and the interior of the glass container 16 is evacuated after the knocking process to manufacture the VFD according to the present invention. Is completed.

이와 같은 공정을 거쳐 제조된 VFD의 동작을 개략적으로 살펴보면 다음과 같다.Looking at the operation of the VFD manufactured through such a process as follows.

먼저, 애노드전극(12)에 수평동기신호 및 영상신호를 인가하고 콘트롤 그리드(18)에 수직동기신호를 인가하며 히터(17)에 네가티브(-) 전위를 인가하면 히터(17)는 열전자를 방출하고, 콘트롤 그리드(18)는 히터(17)와의 전위차에 따라 열전자의 양을 가감한다.First, when a horizontal synchronous signal and an image signal are applied to the anode electrode 12, a vertical synchronous signal is applied to the control grid 18, and a negative (−) potential is applied to the heater 17, the heater 17 emits hot electrons. The control grid 18 adds or subtracts the amount of hot electrons in accordance with the potential difference with the heater 17.

이어서 상기 수평동기신호 및 수직동기신호가 동기될 때 그에 해당하는 화소의 애노드전극(12)이 상기 히터(17)에서 방출된 열전자를 흡수하고 그에 따라 애노드전극(12)상의 형광막(15)이 발광하여 영상신호에 상응하는 정보를 디스플레이한다. 이때 영상신호의 레벨에 따라 해당 화소의 밝기가 가변 제어된다.Subsequently, when the horizontal synchronizing signal and the vertical synchronizing signal are synchronized, the anode electrode 12 of the corresponding pixel absorbs the hot electrons emitted from the heater 17, and thus the fluorescent film 15 on the anode electrode 12 It emits light and displays information corresponding to an image signal. At this time, the brightness of the corresponding pixel is variably controlled according to the level of the video signal.

본 발명에 따른 VFD의 형광막 형성방법은 다음과 같은 효과가 있다.The fluorescent film forming method of the VFD according to the present invention has the following effects.

첫째, 인쇄기법을 사용하지 않고 도포, 전착 및 증착에 의해 형광막을 형성하므로 공정이 간소화되어 생산성을 향상시킬 수 있다.First, since the fluorescent film is formed by coating, electrodeposition, and deposition without using a printing technique, the process can be simplified to improve productivity.

둘째, 10∼20μm두께로 형광체가 증착된 금속와이어를 유리기판상에 직접 접착하기 때문에 화소의 단위인 픽셀의 크기를 획기적으로 감소시킬 수 있다.Second, since the metal wire on which the phosphor is deposited to have a thickness of 10 to 20 μm is directly bonded onto the glass substrate, the size of the pixel, which is a unit of pixel, can be significantly reduced.

셋째, 픽셀의 크기를 줄여서 상기 화소의 개수를 최대한 증가시킬 수 있기 때문에 고해상도를 갖는 VFD가 얻어진다.Third, since the number of pixels can be increased as much as possible by reducing the size of the pixels, a VFD having a high resolution is obtained.

Claims (6)

평판 표시소자에 적용되는 형광막 형성방법에 있어서; 박막 와이어들을 소정의 개수만큼 준비하는 단계와; 상기 박막 와이어들에 R, G, B 형광성 물질을 제각기 도포한후 소성하여 형광막을 형성하는 단계와; 상기 단계후 준비된 유리기판상에 상기 박막 와이어를 원하는 수평 해상도의 개수만큼 접착하는 단계를 포함하여 이루어짐을 특징으로 하는 형광막 형성방법.A fluorescent film forming method applied to a flat panel display device; Preparing a predetermined number of thin film wires; Forming a fluorescent film by coating R, G, and B fluorescent materials on the thin film wires and baking them; And bonding the thin film wire to the glass substrate prepared after the step by the desired number of horizontal resolutions. 제 1 항에 있어서, 상기 형광막은 스프레이 도포법, 페이스트 전착법, 초고주파 증착법중 어느 하나를 이용하여 형성함을 특징으로 하는 형광막 형성방법.The method of claim 1, wherein the fluorescent film is formed using any one of a spray coating method, a paste electrodeposition method, and an ultra high frequency deposition method. 제 2 항에 있어서, 상기 형광막은 10μm∼20μm두께로 형성함을 특징으로 하는 형광막 형성방법.The method of claim 2, wherein the fluorescent film is formed to a thickness of 10μm to 20μm. 제 1 항에 있어서, 상기 박막 와이어는 은(Ag)와이어 임을 특징으로 하는 형광막 형성방법.The method of claim 1, wherein the thin film wire is silver (Ag) wire. 제 1 항에 있어서, 상기 수평해상도의 개수는 적어도 300라인 이상인 것을 특징으로 하는 형광막 형성방법.The method of claim 1, wherein the number of horizontal resolutions is at least 300 lines or more. 제 1 항에 있어서, 상기 유리기판은 소다라임(soda lime) 글래스인 것을 특징으로 하는 형광막 형성방법.The method of claim 1, wherein the glass substrate is soda lime glass.
KR1019970035831A 1997-07-29 1997-07-29 Method for forming a fluorescent film KR100250196B1 (en)

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