KR20000030746A - Protrude Electrode Type Flat Fluorescent Lamp - Google Patents
Protrude Electrode Type Flat Fluorescent Lamp Download PDFInfo
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- KR20000030746A KR20000030746A KR1020000012925A KR20000012925A KR20000030746A KR 20000030746 A KR20000030746 A KR 20000030746A KR 1020000012925 A KR1020000012925 A KR 1020000012925A KR 20000012925 A KR20000012925 A KR 20000012925A KR 20000030746 A KR20000030746 A KR 20000030746A
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- electrodes
- discharge
- electrode
- protruding
- present
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- 238000000034 method Methods 0.000 claims abstract description 14
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 abstract description 13
- 238000005192 partition Methods 0.000 abstract description 9
- 230000001681 protective effect Effects 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 3
- 239000005357 flat glass Substances 0.000 abstract description 3
- 239000004973 liquid crystal related substance Substances 0.000 abstract description 2
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 abstract description 2
- 229910052753 mercury Inorganic materials 0.000 abstract description 2
- 229910052724 xenon Inorganic materials 0.000 abstract description 2
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 abstract description 2
- 239000011521 glass Substances 0.000 description 6
- 230000004888 barrier function Effects 0.000 description 1
- 238000009125 cardiac resynchronization therapy Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
Classifications
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133604—Direct backlight with lamps
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/04—Electrodes; Screens; Shields
- H01J61/06—Main electrodes
- H01J61/067—Main electrodes for low-pressure discharge lamps
- H01J61/0672—Main electrodes for low-pressure discharge lamps characterised by the construction of the electrode
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/30—Vessels; Containers
- H01J61/305—Flat vessels or containers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J65/00—Lamps without any electrode inside the vessel; Lamps with at least one main electrode outside the vessel
- H01J65/04—Lamps in which a gas filling is excited to luminesce by an external electromagnetic field or by external corpuscular radiation, e.g. for indicating plasma display panels
- H01J65/042—Lamps in which a gas filling is excited to luminesce by an external electromagnetic field or by external corpuscular radiation, e.g. for indicating plasma display panels by an external electromagnetic field
- H01J65/046—Lamps in which a gas filling is excited to luminesce by an external electromagnetic field or by external corpuscular radiation, e.g. for indicating plasma display panels by an external electromagnetic field the field being produced by using capacitive means around the vessel
Landscapes
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Vessels And Coating Films For Discharge Lamps (AREA)
Abstract
본 발명은 평판 형광 램프로서 장식용 대형 평판 조명등 및 액정 디스플레이 (LCD; Liquid Crystal Display) 장치에 사용되는 소위 LCD-백라이터용이다. 종래의 백라이터는 주로 원통형 형광램프를 배치하여 면광원으로 사용한다. 또한 최근에는 전극을 평면에 직접 배치한 공면 방전형 평판 램프가 개발되었다. 그러나 이들은 LCD의 대면적화에 따른 고 휘도와 고 효율의 목적에 부합하지 못한다.The present invention is for so-called LCD-backers used in decorative large flat lamps and liquid crystal display (LCD) devices as flat fluorescent lamps. Conventional backlights mainly use cylindrical fluorescent lamps as surface light sources. In recent years, coplanar discharge flat lamps in which electrodes are disposed directly on a plane have been developed. However, they do not meet the purpose of high brightness and high efficiency due to the large area of LCD.
본 발명은 평면상에 배열된 돌출형 전극에 의한 대면 방전 효과에 의한 고효율의 전극 구조를 갖는 평판 형광 램프이다. 상판유리(1)의 배면에 형광체(2)를 도포하고 하판유리(3)에 돌출형 전극(4)을 도포하여 교류형 고압방전에 의하여 플라즈마를 발생하여 자외선에 의한 형광체 발광 방식이다. 본 발명은 돌출 전극 사이의 대향 방전의 효과를 활용하는 것이 특징이다. 일반적으로 전극을 평면 형태로 설치한 공면방전의 경우는 대향방전에 비하여 방전 전압이 높고 방전 효율도 낮다.The present invention is a flat fluorescent lamp having an electrode structure of high efficiency due to the surface discharge effect by the protruding electrodes arranged on a plane. The phosphor 2 is coated on the back surface of the upper plate glass 1 and the protruding electrode 4 is applied to the lower plate glass 3 to generate a plasma by alternating current type high pressure discharge, thereby emitting phosphors by ultraviolet rays. The present invention is characterized by utilizing the effect of counter discharge between the protruding electrodes. In general, coplanar discharges in which electrodes are provided in a planar shape have a higher discharge voltage and lower discharge efficiency than counter discharges.
본 발명에서는 전극 돌출부의 높이를 확보하기 위하여 인쇄 방식으로 격벽을 제작하고 격벽면에 전극을 도포한다. 교류형 방전을 위하여 전극에 유전층과 보호막을 도포한다. 이러한 인쇄 방식은 전극의 구조를 미세하게 하여 고압 방전에 유리하다. 기체의 압력이 낮은 경우는 전극간의 간격을 다소 넓게 하여 전극들 사이도 형광체가 발광하도록 하여 상판과 하판의 형광발광을 통하여 휘도와 효율을 극대화할 수 있다. 본 발명에서는 수은이외에 주로 제논(Xe)의 혼합 기체를 사용한다.In the present invention, in order to secure the height of the electrode protrusions, the partition wall is manufactured by printing and the electrodes are coated on the partition wall surface. A dielectric layer and a protective film are applied to the electrode for alternating current discharge. This printing method is advantageous for high pressure discharge by making the structure of the electrode fine. When the pressure of the gas is low, the distance between the electrodes is slightly widened so that the phosphor emits light between the electrodes, thereby maximizing the brightness and efficiency through the fluorescent emission of the upper and lower plates. In the present invention, a mixed gas of xenon (Xe) is mainly used in addition to mercury.
Description
본 발명은 주로 LCD 백라이터용 면광원과 장식 조명용 램프로서 고효율의 평판 램프를 목적으로 한다.The present invention mainly aims at high-efficiency flat lamps as surface light sources for LCD backlighters and lamps for decorative lighting.
본 발명은 액정디스플레이(Liquid Crystal Display; LCD)의 광원으로 사용되는 소위 LCD-백라이터용으로 고 휘도와 고 효율을 실현하기 위하여 고안되었다. 종래의 LCD용 백라이터는 실린더형 램프를 적당히 배치하여 평판 광원으로 사용하거나 완전한 평판 램프의 형태는 하판에 면 전극을 배열하여 공면 방전의 방식을 채용하고 있다. 이러한 공면 방전은 고효율을 달성하기 어렵다. 또한 LCD의 패널이 대형화되고 모니터와 TV 용으로 사용되기 위하여 고 휘도의 평판 광원이 요구된다. 그러나 종래의 공면형 면방 방식으로는 고 휘도의 달성이 어렵다.The present invention has been devised to realize high brightness and high efficiency for a so-called LCD backlight which is used as a light source of a liquid crystal display (LCD). Conventional LCD backlighters employ a method of coplanar discharge by arranging a cylindrical lamp appropriately to use as a flat light source or in the form of a complete flat lamp by arranging surface electrodes on a lower plate. Such coplanar discharge is difficult to achieve high efficiency. In addition, in order to increase the size of LCD panels and to be used for monitors and TVs, high brightness flat light sources are required. However, it is difficult to achieve high luminance in the conventional coplanar plane method.
본 발명은 전극을 돌출구조로 제작하여 돌출 전극간에 대향 면방전의 효과를 갖는 것이 특징이다. 이러한 전극의 구조는 주로 인쇄 방식으로 격벽을 설치하여 격벽에 금속을 도포하는 방식을 채택한다. 경우에 따라서는 인쇄 방식이외의 방법으로 전극 받침대를 설치할 수도 있다. 격벽이나 전극의 인쇄 방식에 의한 설치는 기술적으로 문제가 없다. 다만 전극의 간격이나 크기는 방전과 기체의 압력 및 형광발광 효율을 감안하여 정한다.The present invention is characterized in that the electrode has a protruding structure and has an effect of opposing surface discharge between the protruding electrodes. The structure of such an electrode adopts a method of applying a metal to the partition by installing a partition by a printing method. In some cases, the electrode support may be provided by a method other than the printing method. Installation by the printing method of a partition or an electrode does not have a technical problem. However, the spacing or size of the electrode is determined in consideration of the discharge and pressure of the gas and fluorescence emission efficiency.
도 1은 돌출 전극형 평판 형광 램프의 개념도로서 상판과 하판이 분리된 사시도(a)와 조립된 상하판의 수직 단면도(b)이다.1 is a conceptual view of a protruding electrode type flat fluorescent lamp, which is a vertical cross-sectional view (b) of an upper and lower plates assembled with a perspective view (a) in which an upper plate and a lower plate are separated.
도 2는 상판과 하판에 형광층을 설치한 돌출 전극형 평판 램프로서 이층구조의 격벽 위에 설치된 돌출 전극을 나타내는 하판의 단면도(a)와 하판에 부착되는 형광판(b)의 개념도로서 전극의 돌출부분을 도려낸 사시도(b), 그리고 상판과 하판의 조립 단면도(c)이다.FIG. 2 is a conceptual diagram of a cross-sectional view (a) of a lower plate showing a protruding electrode provided on a partition of a two-layer structure as a protruding electrode type flat lamp having a fluorescent layer provided on the upper plate and a lower plate, and a fluorescent plate (b) attached to the lower plate. It is the perspective view (b) which cut out, and sectional drawing (c) of an upper board and a lower board.
도 3은 직선형 돌출 전극을 사각형의 돌출 구조로 제작한 하판의 사시도이다.3 is a perspective view of a lower plate of a straight protruding electrode having a rectangular protruding structure.
도면의 주요부분에 대한 부호는 다음과 같다.Reference numerals of the main parts of the drawings are as follows.
1; 상판유리, 2; 상판형광면, 3; 하판유리, 4; 돌출전극, 5; 외곽벽, 6; 격벽, 7; 유전층 및 보호막, 8; 전극받침격벽, 9: 형광판, 10; 형광면.One; Top glass, 2; Top fluorescent surface 3; Bottom glass, 4; A protruding electrode 5; Outer wall, 6; Bulkhead, 7; Dielectric layers and protective films, 8; Electrode support bulkhead, 9: fluorescent plate, 10; Fluorescent surface.
본 발명은 하판에 돌출 전극을 설치하여 전극간의 방전에 의해 생성된 자외선이 형광체를 발광하는 평판 램프이다. 상판유리의 배면에는 형광체를 도포한다. 하판에 다수의 격벽 구조물을 설치하고 그 위에 전극을 도포하여 돌출 전극구조를 만든다. 하판의 돌출 전극들 사이의 방전에 의하여 상판의 형광체가 발광한다. 경우에 따라서 하판의 돌출 전극들 사이에 형광체를 도포한 형광판을 삽입하여 상하판에서 형광체를 발광하는 방식을 채용할 수 있다.The present invention is a flat lamp in which a protruding electrode is provided on a lower plate and ultraviolet light generated by discharge between the electrodes emits phosphors. Phosphor is applied to the back surface of the top glass. A plurality of barrier rib structures are installed on the lower plate and the electrodes are applied thereon to form a protruding electrode structure. The phosphor of the upper plate emits light by the discharge between the protruding electrodes of the lower plate. In some cases, a method of emitting phosphor from the upper and lower plates by inserting a fluorescent plate coated with a phosphor between the protruding electrodes of the lower plate.
도 1은 돌출 전극형 평판 램프의 개념도로서 상판과 하판을 분리한 사시도 (a)와 상하판을 조립한 단면도(b)이다. 상판유리(1)의 배면에 형광체(2)를 도포한다. 하판(3)에는 다수의 돌출 전극(4)과 가장자리에 외곽벽(5)이 설치된다. 외곽벽의 높이는 돌출 전극보다 높게 하여 돌출 전극간에 전면 방전이 되도록 한다. 홀수 번(X-전극)과 짝수 번(Y-전극)의 전극을 각각 외곽에서 연결하여 교류형 전원에 연결한다. 결과적으로 홀수와 짝수번의 전극간에 방전이 된다. 혹은 이웃하는 두 전극을 한쌍으로 하여 동일한 전원에 연결하는 방식으로 구동할 수도 있다. 전극의 간격과 전극의 폭 그리고 돌출 높이는 기체의 압력과 방전 효율을 감안하여 정해진다. 수 100 Torr의 고압 기체의 방전을 위하여 전극간의 간격을 1 mm 이하로 한다. 이러한 경우는 돌출구조와 전극을 인쇄 방식으로 설치할 수 있다. 도 1-(b)는 상하판을 조립한 단면도이다. 돌출격벽(6)을 도포하고 그 위에 전극을 도포한 후 전체 전극면을 유전층과 보호막(7)으로 도포한다. 돌출 전극의 높이가 외곽벽보다 낮다. 교류형 방전에 의하여 플라즈마가 발생하고, 플라즈마로부터 자외선이 방출하여 상판의 형광체를 발광한다. 이때 사용되는 기체는 수은이외에 제논과의 혼합 기체를 사용한다. 교류형 방전이라함은 전극을 유전층으로 도포하여 전원의 극을 교차적으로 인가하는 방식이다. 이때 이온에 의한 전극의 손상을 방지하고 이차전자의 방출을 높이기 위하여 보호막을 추가로 도포한다. 일반적으로 형광체의 발광 방식에서 상판의 형광체 발광의 경우는 상판을 통하여 방출되는 빛의 휘도가 낮다. 따라서 하판의 형광체 발광을 추가하기 위하여 하판에도 형광체를 도포하는 방식을 도 2에 나타내었다.1 is a conceptual view of a protruding electrode type flat lamp, which is a perspective view (a) in which an upper plate and a lower plate are separated, and a cross-sectional view (b) in which an upper and lower plate are assembled. The phosphor 2 is coated on the back surface of the upper glass 1. The lower plate 3 is provided with a plurality of protruding electrodes 4 and outer walls 5 at edges. The height of the outer wall is higher than that of the protruding electrodes to allow front discharge between the protruding electrodes. Connect odd-numbered (X-electrode) and even-numbered (Y-electrode) electrodes from the outside, respectively, to the AC power source. As a result, there is discharge between odd and even electrodes. Alternatively, two neighboring electrodes may be paired and connected to the same power source. The distance between the electrodes, the width of the electrodes, and the height of the protrusions are determined in consideration of the pressure of the gas and the discharge efficiency. In order to discharge a high-pressure gas of several 100 Torr, the distance between electrodes is 1 mm or less. In this case, the protruding structure and the electrode can be installed by a printing method. 1- (b) is a cross-sectional view of the upper and lower plates assembled. After applying the protruding partition 6 and applying the electrode thereon, the entire electrode surface is applied with the dielectric layer and the protective film 7. The height of the protruding electrode is lower than the outer wall. Plasma is generated by alternating current discharge, and ultraviolet rays are emitted from the plasma to emit phosphors on the upper plate. The gas used at this time uses a mixed gas with xenon in addition to mercury. Alternating current discharge is a method of applying an electrode to a dielectric layer to apply a pole of a power supply alternately. At this time, a protective film is further applied to prevent damage of the electrode by ions and to increase emission of secondary electrons. In general, in the case of phosphor emission of the upper panel, the luminance of light emitted through the upper panel is low. Therefore, the method of applying the phosphor to the lower plate in order to add the phosphor emission of the lower plate is shown in FIG.
도 2는 기체의 압력이 도 1의 경우보다 작은 것이다. 하판의 형광체 발광을 위하여 형광판을 별도로 제작하고 전극돌출 부분을 도려낸 형광판을 별도로 제작하여 하판의 돌출 전극부에 끼우는 형태로 제작된다. 도 2-(a)는 하판유리(3)에 설치된 돌출 전극(4)의 단면도이다. 형광판 두께에 해당하는 전극받침격벽(8)을 설치하고 그 위에 이중 층 구조의 격벽이 추가로 설치된다. 이중 층의 격벽 위에 전극이 도포되고 교류형 방전을 위하여 유전층과 보호막(7)을 도포한다. 도 2-(b)는 형광판(9)의 사시도이다. 형광판의 두께는 전극받침격벽(8)의 높이와 같다. 형광판에 형광체(10)를 도포하고 이를 도 2-(a)의 유리판에 덮는다. 이때 형광판의 도려진 부분으로 전극이 돌출되도록 한다. 도 2-(c)는 상판과 하판을 조립한 단면도이다. 상판의 구조는 도 1의 상판과 같이 유리면에 형광체가 도포된다. 돌출된 전극간에 방전에 의하여 상하판의 형광체가 발광한다.2 shows that the pressure of the gas is smaller than that of FIG. 1. In order to emit light of the lower panel, a fluorescent plate is manufactured separately, and a fluorescent plate cut out of the electrode protruding portion is separately manufactured and inserted into the protruding electrode part of the lower plate. 2- (a) is sectional drawing of the protrusion electrode 4 provided in the lower plate glass 3. As shown in FIG. An electrode support bulkhead 8 corresponding to the thickness of the fluorescent plate is provided, and a partition of the double layer structure is additionally installed thereon. An electrode is applied on the partition wall of the double layer, and a dielectric layer and a protective film 7 are applied for alternating current discharge. 2- (b) is a perspective view of the fluorescent plate 9. The thickness of the fluorescent plate is equal to the height of the electrode support bulkhead 8. The phosphor 10 is coated on the phosphor plate and covered with the glass plate of FIG. 2- (a). At this time, the electrode is projected to the cut portion of the fluorescent plate. 2- (c) is sectional drawing which assembled the upper board and the lower board. In the structure of the top plate, a phosphor is coated on a glass surface as in the top plate of FIG. 1. The phosphors on the upper and lower plates emit light between discharges between the protruding electrodes.
본 발명에서 도 1이나 도 2와 같이 돌출형 전극의 구조를 어느 하나의 방향으로 직선형 돌출 전극이외에 도 3과 같은 한정된 길이를 갖는 사각형의 돌출 구조를 채택할 수 있다.In the present invention, as shown in FIG. 1 and FIG. 2, a rectangular protrusion structure having a limited length as shown in FIG. 3 may be adopted in addition to the straight protrusion electrode in either direction.
LCD용 백라이터로 사용하기 위하여는 하판에 반사판을 부착하거나 상판에 확산판 등을 추가로 부착한다.In order to use it as an LCD backlight, a reflector is attached to the lower plate or a diffuser plate is additionally attached to the upper plate.
브라운관을 대처하는 표시장치로서 LCD의 용도가 넓어지고 있다. 노트북 PC에서 테스크탑 모니터 및 액정TV의 영역으로 확대되고 있는 추세이다. 따라서 백라이터의 크기도 10 인치급에서 20 인치 이상의 대화면용으로 그 수요가 증대되고 있다. 동시에 고 휘도와 고 효율을 요구하고 있다. 이러한 관점에서 본 발명에서 제안된 백라이터의 방식은 고 휘도와 고 효율의 특성을 갖는다. 따라서 백라이터의 휘도가 대화면의 LCD에 제한적인 요소가 되지 않으므로 대면적 LCD의 기술 증진과 시장 확대에 큰 변화를 가져올 것이다.The use of LCDs as display devices to cope with CRTs is being expanded. The trend is expanding from notebook PCs to desktop monitors and LCD TVs. Therefore, the size of the backlight is also increasing in demand for large screens of 10 inches to 20 inches or more. At the same time, high brightness and high efficiency are required. In this respect, the method of the backlighter proposed in the present invention has high brightness and high efficiency. Therefore, since the brightness of the backlight is not a limiting factor for the LCD of the large screen, it will bring a big change in the technology enhancement and market expansion of the large area LCD.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR20020091419A (en) * | 2001-05-30 | 2002-12-06 | 김대일 | Area lamp apparatus |
| KR100369308B1 (en) * | 2000-05-24 | 2003-01-24 | 주식회사 이.엠.디 | Flat fluorescent lamp and its manufacturing method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR100369308B1 (en) * | 2000-05-24 | 2003-01-24 | 주식회사 이.엠.디 | Flat fluorescent lamp and its manufacturing method |
| KR20020091419A (en) * | 2001-05-30 | 2002-12-06 | 김대일 | Area lamp apparatus |
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