KR20000003022A - Fluorescent film structure of plasma display panel - Google Patents
Fluorescent film structure of plasma display panel Download PDFInfo
- Publication number
- KR20000003022A KR20000003022A KR1019980024090A KR19980024090A KR20000003022A KR 20000003022 A KR20000003022 A KR 20000003022A KR 1019980024090 A KR1019980024090 A KR 1019980024090A KR 19980024090 A KR19980024090 A KR 19980024090A KR 20000003022 A KR20000003022 A KR 20000003022A
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- fluorescent film
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- plasma display
- display panel
- fluorescent
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J11/00—Gas-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
- H01J11/20—Constructional details
- H01J11/34—Vessels, containers or parts thereof, e.g. substrates
- H01J11/42—Fluorescent layers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J11/00—Gas-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
- H01J11/10—AC-PDPs with at least one main electrode being out of contact with the plasma
- H01J11/12—AC-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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J11/00—Gas-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
- H01J11/20—Constructional details
- H01J11/34—Vessels, containers or parts thereof, e.g. substrates
- H01J11/36—Spacers, barriers, ribs, partitions or the like
Abstract
Description
본 발명은 플라즈마 디스플레이 패널(Plasma Display Panel)에 관한 것으로서, 특히 패널 내부에서 진공자외선(VUV)에 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 vacuum ultraviolet (VUV) 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)의 측면과 기판면에 도포되어 방전시 가시광선을 방출하는 R,G,B 형광막(5)과, 상기 형광막(5)에서 방출되는 가시광선을 전면측으로 반사시키는 반사막(10)과, 상기 격벽(3)사이에 유지전극라인(6,7)과 직교하도록 형성된 복수개의 어드레스 전극라인(4)과, 기판의 소성공정시 전극물질이 배면기판(2)으로 침투하는 것을 방지하는 하지층(11)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, an R, G, B fluorescent film 5 that is applied to the side surfaces of the barrier rib 3 and the substrate surface to emit visible light during discharge, and the fluorescent film 5 And a sustain electrode between the reflective film 10 reflecting the visible light emitted by the light toward the front side and the partition 3. A plurality of address electrode lines 4 formed to be orthogonal to the lines 6 and 7 and a base layer 11 which prevents the electrode material from penetrating into the back substrate 2 during the firing process of the substrate.
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.
이때, 형광막(5)에서 발생되는 가시광선의 일부는 배면기판측으로 출사되게 되는데 이는 반사막(10)에서 다시 전면기판측으로 반사되어 발광휘도저하를 방지하게 된다.At this time, a part of the visible light generated in the fluorescent film 5 is emitted to the back substrate side, which is reflected back to the front substrate side from the reflecting film 10 to prevent the emission luminance decrease.
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 형광막(5)의 평균 도포두께(a)는 20∼40μm 정도이며, 격벽(3)의 높이가 120∼140μm가 됨으로 전면기판(1)과 R,G,B형광막(5)사이의 방전공간 거리가 80∼120μm정도를 유지하게 된다.In the conventional PDP, the average coating thickness (a) of the fluorescent film 5 for generating visible light is about 20 to 40 µm, and the height of the partition 3 is 120 to 140 µm, so that the front substrates 1 and R, The discharge space distance between the G and B fluorescent films 5 is maintained at about 80 to 120 탆.
그러나 형광막 두께가 두꺼울 경우 방전공간의 확보가 어려워 패널의 휘도가 떨어지고 효율이 감소하게 된다. 또한, 이는 형광막내의 정전용량(Capacitance)을 감소시키게 되어 모든 셀을 켜기 위해서는 어드레스전압을 올려야 하는데, 이로 인하여 구동소자의 가격이 증가되는 문제점이 있었다.However, when the thickness of the fluorescent film is thick, it is difficult to secure the discharge space, thereby decreasing the luminance of the panel and reducing the efficiency. In addition, this reduces the capacitance in the fluorescent film, so that the address voltage must be increased in order to turn on all the cells, thereby increasing the cost of the driving device.
본 발명은 상기한 바와같은 종래 기술의 문제점을 해결하기 위하여 발명된 것으로 형광막의 두께를 15±3㎛의 범위내에서 적절하게 조절하여 형성시킴으로서, 형광막의 두께를 휘도감소에 미치는 영향을 최소화 하는 범위내에서 감소시켜 구동전압을 낮추고 방전공간증가를 통해 전체적인 PDP의 휘도를 향상시키도록 하는데 목적이 있다.The present invention is invented to solve the problems of the prior art as described above by forming the thickness of the fluorescent film to be appropriately adjusted within the range of 15 ± 3㎛, the range to minimize the effect of the thickness of the fluorescent film on the brightness reduction The purpose of the present invention is to reduce the driving voltage to lower the driving voltage and to increase the luminance of the overall PDP by increasing the discharge space.
도 1 은 일반적인 플라즈마 디스플레이 패널의 상/하기판 분리 사시도.1 is an exploded perspective view of the upper and lower substrates of a general plasma display panel.
도 2 는 종래 패널의 단면도.2 is a cross-sectional view of a conventional panel.
도 3 은 본 발명에 의한 패널의 단면도.3 is a cross-sectional view of a panel 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 10: 반사막9: protective layer 10: reflective film
11 : 하지막11: underlayer
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 디스플레이 패널의 전체적인 구성 및 동작상태는 종래기술과 동일하므로 형광막 이외의 구성에 대해서는 그 설명을 생략하고 종래와 동일한 도면번호를 부여하기로 한다.Since the overall configuration and operation state of the plasma display panel to which the present invention is applied are the same as in the prior art, the description of the components other than the fluorescent film will be omitted and the same reference numerals will be given.
도 3 은 본 발명에 의한 표시장치의 단면도를 나타낸 것으로 격벽(3)면 사이의 방전공간에 도포되는 R,G,B형광막(5)의 도포두께(b)를 종래보다 적은 15±3㎛범위내에서 적절하게 형성하였다.3 is a cross-sectional view of a display device according to the present invention, in which the application thickness b of the R, G, and B fluorescent films 5 applied to the discharge spaces between the partition walls 3 is less than 15 ± 3 μm. It suitably formed in the range.
일반적으로 형광체도 다른 PDP재료와 같이 유전율을 가지고 있어 두께에 따라서 형광막(5)의 정전용량(C)이 달라진다. 즉, 본 발명에서와 같이 형광막(5)의 두께(b)를 종래에 비해 얇게 형성하면 형광막의 정전용량이 커지게 되어 인가전압을 낮게 유지할 수 있게 된다.In general, phosphors have a dielectric constant like other PDP materials, and the capacitance C of the fluorescent film 5 varies depending on the thickness. That is, as in the present invention, when the thickness b of the fluorescent film 5 is thinner than in the related art, the capacitance of the fluorescent film is increased, so that the applied voltage can be kept low.
그러나 정전용량을 증가시키기 위하여 형광막(5)의 두께를 너무 줄이면 플라즈마 방전시 형광막의 효율이 감소하게 되므로 형광막의 두께를 적절한 범위내에서 균일하게 유지하여야 한다. 즉, 동일한 방전공간을 가질 때의 형광체의 효율감소를 살펴보면 적색(R)형광막은 17→14㎛로 줄어들면 3%의 효율감소가 생기고, 녹색(G)형광막은 22→15㎛ 일 때 2%가 감소하며, 청색(B)형광막은 23→18㎛일 때 3%의 효율감소를 보이지만, 방전공간의 확보로 인한 패널의 효율이 더욱 크게 작용하여 전체적인 PDP의 휘도가 향상될 수 있게되는 것이다.However, if the thickness of the fluorescent film 5 is reduced too much to increase the capacitance, the efficiency of the fluorescent film is decreased during plasma discharge. Therefore, the thickness of the fluorescent film 5 should be kept uniform within an appropriate range. In other words, the efficiency reduction of the phosphor when having the same discharge space shows that the red (R) fluorescent film is reduced to 17 → 14㎛, resulting in a 3% efficiency reduction, and the green (G) fluorescent film is 2% at 22 → 15㎛. The blue (B) fluorescence film exhibits a 3% efficiency decrease when the film is 23 → 18 μm, but the efficiency of the panel due to securing the discharge space is more effective, thereby improving the overall brightness of the PDP.
이상 설명한 바와같이 본 발명은 형광막의 최적설계를 통하여 인가전압 저하를 통한 구동소자의 가격을 줄일 수 있으며, 방전공간의 확보를 통해 PDP의 휘도를 향상시키는 효과가 있다.As described above, the present invention can reduce the price of the driving device by lowering the applied voltage through the optimal design of the fluorescent film, and improves the brightness of the PDP by securing the discharge space.
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20040023958A (en) * | 2002-09-12 | 2004-03-20 | 엘지전자 주식회사 | Plasma display panel |
KR100697016B1 (en) * | 2005-03-16 | 2007-03-20 | 엘지전자 주식회사 | The plasma display panel manufacturing equipment and the methode of the same |
WO2009061032A1 (en) * | 2007-11-05 | 2009-05-14 | Lg Electronics Inc. | Plasma display panel |
-
1998
- 1998-06-25 KR KR1019980024090A patent/KR20000003022A/en not_active Application Discontinuation
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20040023958A (en) * | 2002-09-12 | 2004-03-20 | 엘지전자 주식회사 | Plasma display panel |
KR100697016B1 (en) * | 2005-03-16 | 2007-03-20 | 엘지전자 주식회사 | The plasma display panel manufacturing equipment and the methode of the same |
WO2009061032A1 (en) * | 2007-11-05 | 2009-05-14 | Lg Electronics Inc. | Plasma display panel |
US8350473B2 (en) | 2007-11-05 | 2013-01-08 | Lg Electronics Inc. | Plasma display panel having a phosphor layer including a phosphor material and an additive material |
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