KR100307444B1 - Surface light source device - Google Patents
Surface light source device Download PDFInfo
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- KR100307444B1 KR100307444B1 KR1019940026117A KR19940026117A KR100307444B1 KR 100307444 B1 KR100307444 B1 KR 100307444B1 KR 1019940026117 A KR1019940026117 A KR 1019940026117A KR 19940026117 A KR19940026117 A KR 19940026117A KR 100307444 B1 KR100307444 B1 KR 100307444B1
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- G—PHYSICS
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- 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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- 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
- G02F1/133605—Direct backlight including specially adapted reflectors
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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
- G02F1/133611—Direct backlight including means for improving the brightness uniformity
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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
- H01J11/36—Spacers, barriers, ribs, partitions or the like
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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
- H01J61/30—Vessels; Containers
- H01J61/305—Flat vessels or containers
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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
- G02F1/133612—Electrical details
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- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Vessels And Coating Films For Discharge Lamps (AREA)
Abstract
Description
제1도는 종래 면광원장치를 도시한 개략적인 단면도,1 is a schematic cross-sectional view showing a conventional surface light source device;
제2도는 본 발명에 따른 면광원 장치의 단면도.2 is a cross-sectional view of a surface light source device according to the present invention.
* 도면의 주요 부분에 대한 부호의 설명* Explanation of symbols for the main parts of the drawings
2 : 방전공간 22 : 전면판2: discharge space 22: front panel
23 : 배면판 24 : 제1전극23: back plate 24: first electrode
25 : 제2전극 26 : 보조방전 수단25 second electrode 26 auxiliary discharge means
본 발명은 화상표시소자의 조명장치에 관한 것으로, 더 상세하게는 액정표시소자등의 배면광원으로 사용되는 면광원장치에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an illuminating device of an image display element, and more particularly to a surface light source device used as a back light source such as a liquid crystal display element.
통상적으로 액정표시소자와 같은 표시소자는 그 자체가 발광하여 화상을 형성하지 못하고 외부로부터 빛을 받아 화상을 형성하는 수광형 발광소자이므로 어두운 곳에서는 화상을 볼수 없는 문제점이 있다.In general, a display device such as a liquid crystal display device itself does not form an image by emitting light, but receives a light from the outside to form an image. Therefore, there is a problem in that an image cannot be seen in a dark place.
이와 같은 문제점을 해결하기 위하여 액정표시소자의 매면에 면광원을 설치하여 광을 조사함으로써 어두운 곳에서도 화상을 볼 수 있도록 하고 있는데, 최근에는 조명간판, 디스플레이 패널과 같은 면상의 화상표시소자에 광을 조사하는 면광원장치가 부각되고 있다.In order to solve such a problem, a surface light source is installed on the surface of the liquid crystal display device to illuminate light so that the image can be viewed in a dark place. The surface light source device to irradiate is highlighted.
제1도에는 이러한 면광원 장치의 일예를 나타내 보였다.1 shows an example of such a surface light source device.
이것은 일본 공기 특허 공보 소60-216435호에 개시된 것으로, 밀폐된 용기(11)의 내부에 교호적으로 격벽(12)이 설치되어 사행(蛇行) 형상의 방전공간(13)이 형성되고 이 방전공간의 양 단부에는 각각 전극(14)(14')이 설치되며 방전공간의 내측 전면에는 형광체층(15)이 형성된다.This is disclosed in Japanese Patent Application Laid-Open No. 60-216435. The partition wall 12 is alternately installed inside the sealed container 11 to form a meandering discharge space 13, which is a discharge space. Electrodes 14 and 14 'are provided at both ends of the phosphor layer, and phosphor layers 15 are formed on the inner front surface of the discharge space.
이와 같이 구성된 종래의 면광원 장치는 상기 전극(14)(14')에 소정의 전위가 인가됨에 따라 상기 방전공간(13)에서 글로우(glow) 방전이 일어나고 이 방전에 의해 발생된 자외선에 의해 형광체가 여기되어 광을 방출하게 된다.In the conventional surface light source device configured as described above, as a predetermined potential is applied to the electrodes 14 and 14 ', a glow discharge occurs in the discharge space 13 and the phosphor is caused by ultraviolet rays generated by the discharge. Is excited to emit light.
그러나 이러한 면광원 장치는 방전공가느이 에지(edge)부에서 발광이 미약하여 균일한 휘도를 얻을 수 없으며, 방전을 위한 고압의 전압이 요구되고 전극(14)(14')이 쉽게 열화되는 문제점이 내재되어 있었다. 또한 격벽의 접합부에는 형광체층이 형성되지 않게 되므로 이 부위에서는 발광되지 않게 된다.However, such a surface light source device has a problem in that the discharge hole has a weak light emission at the edge part and thus it is not possible to obtain uniform luminance, requires a high voltage for discharge, and easily deteriorates the electrodes 14 and 14 '. It was inherent. In addition, since the phosphor layer is not formed at the junction of the partition, no light emission occurs at this site.
본 발명은 상기와 같은 문제점을 해결하기 위하여 창출된 것으로서, 발광효율을 향상시켜 높고 균일한 휘도를 얻을 수 있으며, 구조가 간단한 면광원장치를 제공함에 그 목적이 있다.The present invention has been made to solve the above problems, and it is an object of the present invention to provide a surface light source device having a high and uniform luminance by improving luminous efficiency and having a simple structure.
본 발명의 다른 목적은 전극의 열화에 의한 수명의 단축을 방지할 수 있으며, 초기 방전 전압을 낮출 수 있는 면광원 장치를 제공함에 그 목적이 있다.Another object of the present invention is to provide a surface light source device that can prevent the shortening of the lifetime due to deterioration of the electrode, and can lower the initial discharge voltage.
상기 목적을 달성하기 위하여 본 발명은, 상호 대향되게 설치되어 밀폐된 방전공간을 형성하는 배면판 및 전면판과, 상기 전면판과 배면판 사이의 양측면에 대향되도록 설치된 제1.2전극과 전편판의 상면과 배면판의 하면에 각각 형성되며 제1,2전극중 하나의 전극과 통전되는 보조방전수단과, 상기 전면판과 배면판의 방전공간 내면이 적어도 일측에 형성된 형광체층을 구비하여 구성된 것을 그 특지으로 한다.In order to achieve the above object, the present invention provides a rear plate and a front plate which are installed to face each other to form a sealed discharge space, and an upper surface of the first electrode and the first plate which are installed to face both sides between the front plate and the back plate. And auxiliary discharge means respectively formed on the bottom surface of the back plate and the first electrode and the second electrode, and a phosphor layer formed on at least one side of an inner surface of the discharge space of the front plate and the back plate. It is done.
본 발명에 있어서, 상기 보조 방전수단은 전면판과 배면판의 상면과 하면에 각각 형성되며 상기 제1,2전극중 적어도 하나의 전극과 통전되는 투명 도전성 막으로 이루어진다.In the present invention, the auxiliary discharge means is formed on the upper and lower surfaces of the front plate and the back plate, respectively, and is made of a transparent conductive film that is energized with at least one of the first and second electrodes.
그리고 상기 배면판의 하면에는 형광체층으로부터 발생된 광을 전면판 측으로 반하시키는 반사판이 설치된다.And the lower surface of the back plate is provided with a reflecting plate for reflecting light generated from the phosphor layer to the front plate side.
이하 첨부된 도면을 참조하여 본 발명에 따른 한 바람직한 실시예를 상세하게 설명하면 다음과 같다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.
본 발명에 따른 면광원 장치는 전극사이에서 발생되는 글로우방전에 의해 가스를 여기킴으로써 발생되는 자외선을 이용하여 형광체를 여기시켜 발광케 하는 것으로, 제2도에 그 일 실시예를 나타내 보였다.The surface light source device according to the present invention excites phosphors by using ultraviolet rays generated by exciting gas by glow discharge generated between electrodes, and shows an embodiment thereof in FIG.
이것은 상호 소정간격 이격되며 대향되도록 설치되어 밀폐된 방전 공간(21)을 형성하는 전면판(22) 및 배면판(23)과, 상기 전면판(22)의 양측 사이에 상호 대향되도록 설치된 제1,2전극(24)(25)과, 상기 제1,2전극(24)(25)중 한 전극과 통전되면 전면판(22)과 배면판(23)의 상하면에 설치된 보조 방전수단(26)과, 상기 전면판(22)의 하면과 배면판(23)의 상면 즉, 상호 대향되는 면에 형ㅅ겅된 형광체층(28)을 구비하여 구성된다.It is installed so as to face each other and spaced apart from each other at a predetermined interval to form a sealed discharge space 21, the first plate and the back plate 23, the first plate installed so as to face each other between both sides of the front plate 22; Auxiliary electrodes (26) provided on the upper and lower surfaces of the front plate (22) and the back plate (23) when the two electrodes (24) (25) and one of the first and second electrodes (24) (25) are energized. The phosphor layer 28 is formed on the lower surface of the front plate 22 and the upper surface of the rear plate 23, that is, on the opposite surfaces.
여기에서 상기 방전공간(21) 내에는 형광체를 발광시키고 초기 방전전압을 낮출 수 있는 가스 즉, 수소가스가 주이보디고, 상기 상기 배면판(23)의 하면에 알루미늄을 증착하거나, 알루미늄 판이 부착되어 형성된 반사층이 더 구비된다. 그리고 상기 전면판과 배면판은 전하의 대전이 용이한 유전체로 이루어져 있다.In this discharge space 21, a gas capable of emitting a phosphor and lowering an initial discharge voltage, that is, hydrogen gas, is predominant, and aluminum is deposited on the bottom surface of the back plate 23 or an aluminum plate is attached. The formed reflective layer is further provided. The front plate and the back plate are made of a dielectric that is easy to charge.
상기 보조 방전수단은 상기 전면판(22)과 배면판(23)의 상하면에 형성되며 제1,2전극(24)(25)중 한 전극인 제2ㅓㄴ극(25)과 통전되는 투명 도전성막(26a)으로 이루어진다.The auxiliary discharging means is formed on the upper and lower surfaces of the front plate 22 and the back plate 23 and is transparent to the second electrode 25 which is one of the first and second electrodes 24 and 25. It consists of 26a.
이와같이 구성된 본 발명에 따른 면광원 장치의 작용을 설명하면 다음과 같다.Referring to the operation of the surface light source device according to the present invention configured as described above are as follows.
본 발명에 따른 면광원 장치를 구동시키기 위해서는 먼저, 상기 제1전극(24)와 제2전극(25)에 고주파 또는 펄스 전압을 인가한다. 이와같이 하면 보조 방전수단의 투명 도전성 막(26a)과 전기적으로 통전되지 않은 제1전극(24)과 근접된 투명 도전막(26a)의 가장자리로부터 방전이 개시도니 후 연속적으로 방전이 일어나 최종적으로는 제1,2전극(24)(25) 사이 및 제1전극(24)과 투명 도전막(26a) 사이에서 방전이 방전이 이루어지게 된다. 이때에 가속된 전자가 수은을 여기시키고 이 수은에서 발생된 자외선이 형광체층(28)의 형광체를 여기시켜 형광체를 발광시키게 된다. 이때에 상기 형광체층(28)의 형광체로부터 발생된 광은 전면판(22)를 통하여 전면으로 조사되게 되고 상기 매면판(23) 측으로 조사된 광은 반사막(29)에 의해 반사되어 전면판(22)측으로 조사된다. 상기와 같은 과정에서 제1.2전극(24)(25) 및 투명 도전성막(26) 사이에서의 방전은 전면판(22)과 배면판(23) 사이의 전 영역에서 이루어지므로 발광영역 각 부위에서 균일한 발광휘도를 얻을 수 있다.In order to drive the surface light source device according to the present invention, high frequency or pulse voltage is first applied to the first electrode 24 and the second electrode 25. In this case, after the discharge starts from the edge of the transparent conductive film 26a adjacent to the first electrode 24 which is not electrically energized with the transparent conductive film 26a of the auxiliary discharge means, discharge is continuously performed. Discharge is performed between the first and second electrodes 24 and 25 and between the first electrode 24 and the transparent conductive film 26a. At this time, the accelerated electrons excite mercury, and the ultraviolet rays generated from the mercury excite the phosphor of the phosphor layer 28 to emit the phosphor. At this time, the light generated from the phosphor of the phosphor layer 28 is irradiated to the front surface through the front plate 22 and the light irradiated to the side of the surface plate 23 is reflected by the reflective film 29 is the front plate 22 It is investigated to the side. In the above process, since the discharge between the first and second electrodes 24 and 25 and the transparent conductive film 26 is performed in the entire area between the front plate 22 and the back plate 23, it is uniform in each region of the light emitting area. A luminous luminance can be obtained.
특히 본 발명에 따른 면광원 장치의 방전은 제1전극(24)과 근접되는 투명 도전성 막(26a)의 가장자리에서 개시되고 연속적으로 제2전극925)으로 이루어지게 되므로 초기 방전 개시전압을 낮출 수 있다.In particular, since the discharge of the surface light source device according to the present invention is initiated at the edge of the transparent conductive film 26a adjacent to the first electrode 24 and continuously made of the second electrode 925, the initial discharge start voltage can be lowered. .
이상에서 설명한 바와같이 본 발명 면광원 장치는 글로우 방전에 의해 가스를 여기시키고 가스에서 방출된 자외선에 의해 형광체를 여기시켜 발광케 함으로써 상대적인 휘도를 향상시킬 수 있으며, 그 구조가 간단하여 제조원가를 절감할 수 있다. 또한 본 발명은 초기 방전의 개시가 제1전극과 전면판과 배면판의 상하면에 형성된 투명 도전성 막의 가장자리로부터 이루어지게 되므로 초기 방전전압을 낮출 수 있다.As described above, the surface light source device of the present invention can improve relative luminance by exciting gas by glow discharge and exciting phosphor by ultraviolet rays emitted from the gas, and the structure thereof is simple to reduce manufacturing cost. Can be. In addition, the present invention can start the initial discharge is made from the edge of the transparent conductive film formed on the upper and lower surfaces of the first electrode, the front plate and the back plate can lower the initial discharge voltage.
본 발명에 따른 면광원 장치는 액정표시소자 뿐만아니라 발광 간판 또는 각종 화상표시소자의 광원으로써 널리 사용할 수 있다.The surface light source device according to the present invention can be widely used not only as a liquid crystal display device but also as a light source for a light emitting signboard or various image display devices.
Claims (5)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019940026117A KR100307444B1 (en) | 1994-10-12 | 1994-10-12 | Surface light source device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019940026117A KR100307444B1 (en) | 1994-10-12 | 1994-10-12 | Surface light source device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR960015030A KR960015030A (en) | 1996-05-22 |
| KR100307444B1 true KR100307444B1 (en) | 2001-12-01 |
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ID=37530436
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1019940026117A KR100307444B1 (en) | 1994-10-12 | 1994-10-12 | Surface light source device |
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| Country | Link |
|---|---|
| KR (1) | KR100307444B1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100769158B1 (en) * | 2000-12-04 | 2007-10-23 | 엘지.필립스 엘시디 주식회사 | flat lamp for emitting light to surface and liquid crystal display having it |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE59703652D1 (en) * | 1996-08-22 | 2001-07-05 | Ciba Sc Holding Ag | Crystal modification of a diketopyrrolopyrrole pigment |
| KR100749167B1 (en) * | 2000-08-25 | 2007-08-14 | 하홍주 | flat lamp |
| US6843587B2 (en) | 2002-05-11 | 2005-01-18 | Ls Tech Co., Ltd. | Surface light source apparatus, and method and apparatus for manufacturing the same |
-
1994
- 1994-10-12 KR KR1019940026117A patent/KR100307444B1/en not_active IP Right Cessation
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100769158B1 (en) * | 2000-12-04 | 2007-10-23 | 엘지.필립스 엘시디 주식회사 | flat lamp for emitting light to surface and liquid crystal display having it |
Also Published As
| Publication number | Publication date |
|---|---|
| KR960015030A (en) | 1996-05-22 |
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