KR100263772B1 - Phosphor structure of plasma display device - Google Patents

Phosphor structure of plasma display device Download PDF

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Publication number
KR100263772B1
KR100263772B1 KR1019980009940A KR19980009940A KR100263772B1 KR 100263772 B1 KR100263772 B1 KR 100263772B1 KR 1019980009940 A KR1019980009940 A KR 1019980009940A KR 19980009940 A KR19980009940 A KR 19980009940A KR 100263772 B1 KR100263772 B1 KR 100263772B1
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plasma display
fluorescent film
fluorescent
fluorescent layer
particles
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KR1019980009940A
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Korean (ko)
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KR19990075623A (en
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장성호
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구자홍
엘지전자주식회사
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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01JELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J11/00Gas-filled discharge tubes with alternating current induction of the discharge, e.g. alternating current plasma display panels [AC-PDP]; Gas-filled discharge tubes without any main electrode inside the vessel; Gas-filled discharge tubes with at least one main electrode outside the vessel
    • H01J11/20Constructional details
    • H01J11/34Vessels, containers or parts thereof, e.g. substrates
    • H01J11/42Fluorescent layers
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01JELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J11/00Gas-filled discharge tubes with alternating current induction of the discharge, e.g. alternating current plasma display panels [AC-PDP]; Gas-filled discharge tubes without any main electrode inside the vessel; Gas-filled discharge tubes with at least one main electrode outside the vessel
    • H01J11/10AC-PDPs with at least one main electrode being out of contact with the plasma
    • H01J11/12AC-PDPs with at least one main electrode being out of contact with the plasma with main electrodes provided on both sides of the discharge space

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Gas-Filled Discharge Tubes (AREA)

Abstract

PURPOSE: A structure of a fluorescent layer in a plasma display device is provided to enlarge a discharge space and improve luminance of a plasma display panel by enhancing an adhesive strength of a fluorescent layer. CONSTITUTION: A minute quantity of glass bead(25) of 1-2 micrometers is mixed to fluorescent particles(15) of 3-4 micrometers. A fluorescent layer is formed by printing the mixed material. The glass bead(25) larger than a size of a fluorescent particles(15) sinks on a bottom when the fluorescent layer is dried. The sunk glass bead(25) is distributed around a barrier rib(3). The glass bead(25) within a fluorescent layer(5) is formed between the fluorescent particles(15). Accordingly, an adhesive strength of the fluorescent layer is enhanced.

Description

플라즈마 표시장치의 형광막구조Phosphor Film Structure of Plasma Display

본 발명은 플라즈마 디스플레이 패널(Plasma Display Panel)에 관한 것으로서, 특히 패널 내부에서 자외선에 의해 여기되면서 가시광선을 방출시키는 형광막구조에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display panel, and more particularly, to a fluorescent film structure that emits visible light while being excited by ultraviolet rays inside the panel.

도 1 은 일반적인 3전극 면방전 PDP의 구조를 나타낸 것으로 구조를 살펴보면, 화상의 표시면인 전면기판(1)과, 상기 전면기판(1)과 일정거리를 사이에 두고 평행하게 위치한 배면기판(2)으로 이루어지는데, 상기 전면기판(1)에는 배면기판(2) 대향면에 일정간격으로 형성된 복수개의 유지전극라인(6,7)과, 상기 복수개의 유지전극라인(6,7)위에 형성되어 방전전류를 제한하는 유전층(8)과, 상기 유전층(8)위에 형성되어 상기 유지전극라인(6,7)을 보호하는 보호층(9)으로 구성되며, 상기 배면기판(2)에는 복수개의 방전공간을 형성시키는 스트라이프 타입의 격벽(3)과, 상기 격벽(3)사이에 유지전극라인(6,7)과 직교하도록 형성된 복수개의 어드레스 전극라인(4)과, 상기 각 방전공간의 내부면 중 양측 격벽면과 배면 기판면에 해당 어드레스전극라인(4)에 도포되어 방전시 가시광선을 방출하는 R,G,B 형광막(5)으로 이루어진다.1 illustrates a structure of a general three-electrode surface discharge PDP. Referring to the structure, the front substrate 1, which is a display surface of an image, and the rear substrate 2 disposed in parallel with a predetermined distance therebetween The front substrate (1) is formed on the plurality of sustain electrode lines (6,7) and the plurality of sustain electrode lines (6,7) formed at regular intervals on the opposite surface of the back substrate (2) A dielectric layer 8 for limiting discharge current and a protective layer 9 formed on the dielectric layer 8 to protect the sustain electrode lines 6 and 7, and a plurality of discharges on the back substrate 2. A stripe-type barrier rib 3 forming a space, a plurality of address electrode lines 4 formed orthogonal to the sustain electrode lines 6 and 7 between the barrier ribs 3, and an inner surface of each of the discharge spaces. It is applied to the corresponding address electrode line 4 on both side walls and back substrate surface. When composed of R, G, B phosphor layer 5, which emits visible light.

도 2 는 도 1 의 상,하부 기판이 결합된후의 플라즈마 표시장치 단면도를 나타낸 것으로서 이해를 돕기위해 상부구조를 90도 회전하여 도시하였다.FIG. 2 is a cross-sectional view of the plasma display device after the upper and lower substrates of FIG. 1 are combined, and the upper structure is rotated 90 degrees for better understanding.

상기와 같이 구성된 종래기술에 의한 PDP중 임의의 셀의 화상표시과정은 다음과 같다.The image display process of any cell in the PDP according to the prior art configured as described above is as follows.

먼저, 해당 투명전극라인(6)과 어드레스전극(4)에 150V∼300V의 방전개시전압이 공급되면 해당 방전공간의 내부면에 벽전하가 형성된다.First, when the discharge start voltage of 150V to 300V is supplied to the transparent electrode line 6 and the address electrode 4, wall charges are formed on the inner surface of the corresponding discharge space.

그후, 투명전극라인(6)과 해당 어드레스 전극라인(4)에 어드레스 방전전압이 공급되면 상기 투명전극라인(6)과 해당 어드레스 전극라인(4)간의 어드레스 방전이 일어나게 된다. 즉, 셀 내부에서 전계가 발생하여 방전가스중의 미량전자들이 가속되고, 가속된 전자와 가스중의 중성입자가 충돌하여 전자와 이온으로 전리되며, 상기 전리된 전자와 중성입자와의 또 다른 충돌등으로 중성입자가 점차 빠른 속도로 전자와 이온으로 전리되어 방전가스가 플라즈마 상태로 되는 동시에 진공 자외선(UV)이 발생된다. 상기 발생된 자외선이 형광막(5)을 여기시켜 가시광선을 발생시키고 발생된 가시광선은 전면기판(1)을 통해서 외부로 출사되면 외부에서 임의의 셀의 발광 즉, 화상표시를 인식할 수 있게된다.Thereafter, when an address discharge voltage is supplied to the transparent electrode line 6 and the address electrode line 4, an address discharge occurs between the transparent electrode line 6 and the address electrode line 4. In other words, an electric field is generated inside the cell, and the trace electrons in the discharge gas are accelerated, the accelerated electrons and the neutral particles in the gas collide with each other, and are ionized into electrons and ions, and another collision between the ionized electrons and the neutral particles is performed. Neutral particles are ionized into electrons and ions at a rapid rate, and the discharge gas becomes plasma, and vacuum ultraviolet (UV) is generated. The generated ultraviolet rays excite the fluorescent film 5 to generate visible light, and when the generated visible light is emitted to the outside through the front substrate 1, light emitted from any cell can be recognized from the outside, that is, image display. do.

그후, 해당 투명전극라인(6)에 150V 이상의 유지방전전압이 공급되면 상기 투명전극라인(6)간에 유지방전이 일어나 임의의 셀의 발광이 일정 시간동안 유지된다.After that, when the sustain discharge voltage of 150 V or more is supplied to the transparent electrode line 6, the sustain discharge occurs between the transparent electrode lines 6, so that light emission of any cell is maintained for a predetermined time.

이와같은 종래 PDP에 있어 가시광선을 발생시키는 형광체입자는 입경이 약3∼4㎛ 정도이며 형광막(5) 도포두께는 15∼20㎛ 정도를 유지하게 되는데, 도 2 의 a부위와 같은 곳은 도포두께가 30∼35㎛로 두껍게 도포되게 된다.In the conventional PDP, the phosphor particles that generate visible light have a particle size of about 3 to 4 μm and a thickness of 15 to 20 μm for the fluorescent film 5. The coating thickness is thickly applied at 30 to 35 mu m.

일반적으로 가시광의 발생을 위한 형광막의 두께는 3㎛ 내외가 적당한 것으로 알려져 있으나, 형광막(5)에서 발생되는 가시광선이 후면으로 빠져나가는 것을 방지하기 위하여 형광막의 두께를 15㎛ 이상으로 도포해야하고 이는 결국 방전공간을 감소시켜 PDP 휘도를 저하시키는 문제점이 있었다.In general, the thickness of the fluorescent film for the generation of visible light is known to be suitable around 3㎛, in order to prevent the visible light generated from the fluorescent film 5 to escape to the back side, the thickness of the fluorescent film should be applied to 15㎛ or more This, in turn, has a problem of reducing the PDP brightness by reducing the discharge space.

본 발명은 상기한 바와같은 종래 기술의 문제점을 해결하기 위하여 발명된 것으로 형광체입자들 사이에 형광체의 입경보다 작은 입경을 갖는 글래스비드를 포함시켜 배면기판면과 격벽측면에 형광막을 형성시킴으로써, 형광막의 부착력을 높혀서 형광막의 도포두께를 얇게 형성하여 방전공간을 확대시키고, 또한 글래스비드가 빛을 반사시키는 역할을 하도록하여 PDP휘도를 향상시키도록 하는데 목적이 있다.The present invention has been invented to solve the problems of the prior art as described above by including a glass bead having a particle diameter smaller than the particle diameter of the phosphor particles between the phosphor particles to form a fluorescent film on the back substrate surface and the partition wall side, The purpose of the present invention is to increase the adhesion and to form a thinner coating layer of the fluorescent film to enlarge the discharge space, and to improve the PDP luminance by causing the glass beads to reflect light.

도 1 은 종래 플라즈마 디스플레이 패널의 상,하기판 분리 사시도.1 is an exploded perspective view of the upper and lower substrates of a conventional plasma display panel.

도 2 는 종래 플라즈마 디스플레이 패널의 단면도 및 형광막입자 형상도.2 is a cross-sectional view and a shape of fluorescent film particles of a conventional plasma display panel.

도 3 은 본 발명에 의해 패널 단면도 및 형광체와 글래스비드가 혼합된 형광막 조성상태도.Figure 3 is a cross-sectional view of the panel and the state of the fluorescent film composition of the phosphor and glass beads mixed according to the present invention.

*** 도면의 주요 부분에 대한 부호의 설명 ****** Explanation of symbols for the main parts of the drawing ***

1 : 전면기판 2 : 배면기판1: Front board 2: Back board

3 : 격벽 4 : 어드레스전극3: bulkhead 4: address electrode

5 : 형광막 6 : 투명전극5: fluorescent film 6: transparent electrode

7 : 버스전극 8 : 유전층7 bus electrode 8 dielectric layer

9 : 보호층 15 : 형광체입자9: protective layer 15: phosphor particles

25 : 글래스비드25: glass beads

이하, 본 발명을 첨부도면을 참조하여 이하에서 상세히 설명한다.Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

본 발명이 적용되는 플라즈마 표시장치는 형광막구조를 제외하고 전체적인 구성 및 동작상태는 종래기술과 동일하므로 그 이외의 구성에 대해서는 그 설명을 생략하고 종래와 동일한 도면번호를 부여하기로 한다.In the plasma display device to which the present invention is applied, the overall configuration and operation state except for the fluorescent film structure are the same as in the prior art, and the description thereof will be omitted and the same reference numerals will be given.

도 3 은 본 발명에 의한 PDP단면도를 나타낸 것으로 형광막의 조성구조를 살펴보면, 형광체입자(15;입경 3∼4㎛)에 미량의 글래스비드(25;입경 1∼2㎛)를 혼합하여 인쇄하게 되는데, 건조시에 형광체입자(15)에 비하여 비중이 큰 글래스비드(25)가 바닥으로 가라앉게 되어 격벽(3) 주위에 분포하게 된다.3 is a cross-sectional view of the PDP according to the present invention. Looking at the composition of the fluorescent film, a small amount of glass beads 25 (particles 1 to 2 μm) are mixed with the phosphor particles 15 (particles 3 to 4 μm) and printed. At the time of drying, the glass beads 25 having a larger specific gravity than the phosphor particles 15 sink to the bottom and are distributed around the partition 3.

이로서 형광막(5)내에 존재하는 글래스비드(25)는 형광체(15) 사이에 존재하게 되며 종래의 구조보다 충진율이 좋은 막을 가지게 되어 형광막의 부착력이 향상된다.As a result, the glass beads 25 present in the fluorescent film 5 are present between the fluorescent materials 15 and have a film having a better filling rate than the conventional structure, thereby improving adhesion of the fluorescent film.

또한, 가시광선이 후면으로 빠져나가는 것을 방지하기 위하여 종래 기술에서 형광막의 두께를 증가시키던 것을 본 발명에서는 글래스비드(25)가 반사막역할을 수행함으로, 형광막(5)의 도포두께를 5㎛ 이내로 도포가 가능하게 되어 방전공간을 증가시킬수 있게 된다.In addition, in the present invention, the thickness of the fluorescent film was increased in order to prevent the visible light from escaping to the rear side. In the present invention, the glass beads 25 perform the role of reflecting film, so that the coating thickness of the fluorescent film 5 is within 5 μm. It is possible to apply the coating to increase the discharge space.

전술한 바와같이, 본 발명의 기술적 요지는 형광체의 반사율 및 막부착력을 높여 형광체의 도포두께를 최소화 시키며, 이를 통한 방전공간의 증가로 휘도를 증가시키는 것으로서, 형광막에 혼합되는 글래스비드의 입경은 형광체입자의 입경보다 작은 크기로 상호간의 충진율을 향상시키는 여타의 모든 실시예를 기술적 범주에 포함시킨다.As described above, the technical gist of the present invention is to minimize the coating thickness of the phosphor by increasing the reflectance and the film adhesion of the phosphor, and to increase the brightness by increasing the discharge space through this, the particle size of the glass bead mixed in the phosphor film All other embodiments for improving the filling rate of each other by a size smaller than the particle diameter of the phosphor particles are included in the technical scope.

이상 설명한 바와같이 본 발명의 형광막구조는 형광막의 충진율이 높아져 막부착력을 높이며, 글래스비드에 의한 가시광선의 반사율을 높이고, 방전공간을 증가시킴으로 PDP 휘도를 향상시켜주는 효과가 있다.As described above, the fluorescent film structure of the present invention has the effect of improving the PDP brightness by increasing the filling rate of the fluorescent film, increasing the film adhesion, increasing the reflectance of visible light by glass beads, and increasing the discharge space.

Claims (3)

자외선에 의해 여기되어 가시광선을 방출하는 형광막이 구비되어 있는 플라즈마 표시장치에 있어서,A plasma display device comprising a fluorescent film that is excited by ultraviolet rays and emits visible light, 상기 형광막은 형광체 입자와, 상기 형광체 입자의 입경보다 작은 입경을 갖는 글래스비드로 이루어짐을 특징으로 하는 플라즈마 표시장치의 형광막구조.And the fluorescent film is formed of phosphor particles and glass beads having a particle diameter smaller than that of the phosphor particles. 제 1 항에 있어서,The method of claim 1, 상기 글래스비드는 입경이 2㎛ 이하임을 특징으로 하는 플라즈마 표시장치의 형광막구조.And the glass beads have a particle diameter of 2 μm or less. 제 1 항에 있어서,The method of claim 1, 상기 형광막의 도포두께는 5㎛ 이하임을 특징으로 하는 플라즈마 표시장치의 형광막구조.And a coating thickness of the fluorescent film is 5 μm or less.
KR1019980009940A 1998-03-23 1998-03-23 Phosphor structure of plasma display device KR100263772B1 (en)

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