KR19980023174A - Backlight Structure of Liquid Crystal Display for Light Uniformity - Google Patents
Backlight Structure of Liquid Crystal Display for Light Uniformity Download PDFInfo
- Publication number
- KR19980023174A KR19980023174A KR1019960042612A KR19960042612A KR19980023174A KR 19980023174 A KR19980023174 A KR 19980023174A KR 1019960042612 A KR1019960042612 A KR 1019960042612A KR 19960042612 A KR19960042612 A KR 19960042612A KR 19980023174 A KR19980023174 A KR 19980023174A
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- South Korea
- Prior art keywords
- guide plate
- light guide
- light
- lamp
- backlight structure
- Prior art date
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/0058—Means for improving the coupling-out of light from the light guide varying in density, size, shape or depth along the light guide
- G02B6/0061—Means for improving the coupling-out of light from the light guide varying in density, size, shape or depth along the light guide to provide homogeneous light output intensity
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
- G02B6/0055—Reflecting element, sheet or layer
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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
- G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Planar Illumination Modules (AREA)
Abstract
본 발명은 광 균일성을 위한 액정 표시 장치의 백라이트 구조에 관한 것으로, 도광판의 양측면은 도광판 안쪽으로 하향 경사져 있고, 도광판의 하부면은 도광판 중앙에서 양측면으로 하향 경사지게 형성되어 있는 도광판과, 도광판의 양측면에 설치된 램프들을 램프 반사판이 각각 감싸며 형성되어 있는 것을 특징으로 한다.The present invention relates to a backlight structure of a liquid crystal display device for light uniformity, wherein both side surfaces of the light guide plate are inclined downward into the light guide plate, and a lower surface of the light guide plate is formed to be inclined downward from both sides of the light guide plate to both sides, and both side surfaces of the light guide plate. Lamps installed in the lamp reflector are characterized in that the wrap is formed.
본 발명은 램프 반사판을 도광판 양측면에 각각 형성하므로써 램프의 열을 감소시키고, 램프 빛이 서로 충돌하면서 발생하는 빛의 감소 현상을 줄여 빛효율을 향상시키며, 이로인해 변형된 도광판에 의해서 광 균일성이 향상된다.The present invention reduces the heat of the lamp by forming the lamp reflector on each side of the light guide plate, and improves the light efficiency by reducing the decrease of light generated when the lamp light collides with each other, thereby improving the light uniformity by the modified light guide plate. Is improved.
Description
본 발명은 액정 표시 장치에 관한 것으로, 더욱 상세하게는 램프 반사판이 램프를 각각 감싸므로써 램프의 열을 감소시키고, 램프의 빛이 서로 충돌하여 발생하는 빛의 감소 현상을 줄여 광효율을 향상시키며, 변형된 도광판에 의해 빛이 균일하게 분포하도록 하는 광 균일성을 위한 액정 표시 장치의 백라이트 구조에 관한 것이다.The present invention relates to a liquid crystal display device, and more particularly, a lamp reflector covers each lamp to reduce heat of the lamp, reduces light reduction caused by collision of light of the lamp, and improves light efficiency. It relates to a backlight structure of a liquid crystal display device for light uniformity so that light is uniformly distributed by the light guide plate.
일반적으로 LCD는 자체 발광하지 못하는 수광소자로써, 어두운 곳에서는 사용할 수 없기 때문에 액정판 후면에 부착된 백라이트를 이용하여 화상을 디스플레이시킨다.In general, LCDs are light-receiving elements that do not emit light by themselves, and thus cannot be used in a dark place, and thus display images using a backlight attached to the back of the liquid crystal panel.
백라이트 방식에는 크게 구분해서 직하방식과 에지(edge)방식이 채용되고 있으며, 직하방식은 LCD 패널의 밑면에 광원을 두어 패널 전면을 직접 조광하는 방식으로, 광원은 주로 엘렉트로 루미네센스(EL)가 사용되고, 에지방식은 LCD패널의 일측면 또는 양측면에 광원을 두어 도광판과 반사판에 광선을 반사, 확산하는 방식으로, 광원으로는 냉음극관, 열음극관, 형광등 등이 사용되고 있다.The direct backlight method and the edge method are widely used for the backlight method, and the direct method is a method of directly dimming the front of the panel by placing a light source on the bottom of the LCD panel. The light source is mainly an electroluminescence (EL). The edge method is a method of reflecting and diffusing light on a light guide plate and a reflecting plate by placing a light source on one or both sides of the LCD panel, and a cold cathode tube, a hot cathode tube, a fluorescent lamp, and the like are used as the light source.
오늘날 고정세화, 대형화 경향을 갖는 LCD는 밝은 휘도와 높은 빛 균일성을 가지기 위하여 많은 램프를 사용하는데, 이때 램프들이 도광판 양측에 위치하는 에지 방식을 사용한다.Today's LCDs with high definition and large size use many lamps to have bright brightness and high light uniformity, using an edge method in which the lamps are located on both sides of the light guide plate.
도 1은 종래의 기술에 의한 백라이트 구조를 나타낸 단면도이다.1 is a cross-sectional view showing a backlight structure according to the prior art.
LCD 패널(10)과, 상기 LCD 패널(10) 아래에 도광판(30)이 위치해 있으며, 도광판(30)의 양측에는 도광판(30)에 대향하고 있는 램프(20)들을 램프 반사판(40)이 반원형으로 감싸고 있고, 도광판(30)의 아래에는 반사판(50)이 부착되어 있다.An LCD panel 10 and a light guide plate 30 are positioned below the LCD panel 10, and lamps 20 opposite to the light guide plate 30 are disposed on both sides of the light guide plate 30. And a reflecting plate 50 is attached to the bottom of the light guide plate 30.
이와 같이 구성된 종래의 백라이트의 작용을 설명하면 다음과 같다.The operation of the conventional backlight configured as described above is as follows.
도광판(30)의 양측에 설치된 램프(20)들에서 방사된 빛은 램프 반사판(40)에 반사되어 도광판(30)에 입사되거나, 램프(40) 빛이 직접 도광판(30)에 입사되며, 입사된 빛은 도광판(50)에 의해 반사되어 LCD 패널(10) 배면을 투과한다.Light emitted from the lamps 20 installed on both sides of the light guide plate 30 is reflected by the lamp reflector 40 and is incident on the light guide plate 30, or the light of the lamp 40 is directly incident on the light guide plate 30. The reflected light is reflected by the light guide plate 50 to pass through the back of the LCD panel 10.
또한, 도광판(30) 후면으로 유출된 빛은 반사판(30)에 의해서 도광판(30)으로 다시 투과된다.In addition, the light leaked to the rear surface of the light guide plate 30 is transmitted back to the light guide plate 30 by the reflective plate 30.
그러나, 램프들이 하나의 램프 반사판 안에 겹쳐서 설치됨에 따라, 보다 많은 열이 발생하거나, 램프에서 나온 빛이 서로 충돌하여 빛이 감소되며, 이로 인해 광효율이 떨이지게 되고, 도광판이 직사각형으로 형성되어 있어 광 균일성이 저하되는 문제점이 발생하였다.However, as the lamps are superimposed in one lamp reflector, more heat is generated, or the light from the lamp collides with each other, which reduces the light, resulting in a decrease in light efficiency, and the light guide plate is formed in a rectangular shape so that the light There was a problem of lowering uniformity.
따라서, 본 발명의 목적은 램프의 열 발생을 줄이고, 빛의 충돌 현상을 방지하며, 도광판의 변형을 통해서 광 균일성을 높일 수 있도록 한 광 균일성을 위한 액정 표시 장치의 백라이트 구조를 제공하는데 있다.Accordingly, an object of the present invention is to provide a backlight structure of a liquid crystal display device for light uniformity that reduces heat generation of a lamp, prevents light collision, and improves light uniformity through deformation of a light guide plate. .
도 1은 종래의 기술에 의한 백라이트 구조를 나타낸 단면도.1 is a cross-sectional view showing a backlight structure according to the prior art.
도 2는 본 발명에 의한 백라이트 구조를 나타낸 단면도.2 is a cross-sectional view showing a backlight structure according to the present invention.
도면의 주요 부분에 대한 부호의 설명Explanation of symbols for the main parts of the drawings
10 : LCD 패널20 : 램프10 LCD panel 20 Lamp
30,31 : 도광판50,51 : 반사판30,31: LGP 50,51: Reflector
40,41: 램프 반사판40,41: lamp reflector
이와 같은 목적을 달성하기 위해서, 본 발명은 램프 반사판이 램프들을 각각 감싸며, 도광판의 양측면은 도광판 안쪽으로 하향 경사져 있고, 도광판의 하부면은 도광판 중앙에서 양측면으로 하향 경사지게 형성되어 있는 도광판인 것을 특징으로 한다.In order to achieve the above object, the present invention is characterized in that the lamp reflecting plate wraps the lamps respectively, both sides of the light guide plate is inclined downward toward the light guide plate, the lower surface of the light guide plate is characterized in that the light guide plate formed inclined downward from both sides of the light guide plate. do.
이하 본 발명에 의한 액정 표시 장치의 백라이트 구조를 도 2를 참조하여 상세히 설명하기로 한다. 종래의 부분과 동일한 부분에는 동일한 부호를 부여하도록 한다.Hereinafter, the backlight structure of the liquid crystal display according to the present invention will be described in detail with reference to FIG. 2. The same reference numerals are given to the same parts as the conventional parts.
도시된 바와 같이, LCD 패널(10)과, 상기 LCD 패널(10) 아래에는 도광판(31)의 양측면은 도광판(31) 안쪽으로 하향 경사져 있고, 도광판(31)의 하부면은 도광판(31) 중앙에서 양측면으로 하향 경사지게 형성되어 있는 도광판(31)이 위치해 있으며, 도광판(31)의 양측에는 도광판(31)에 대향하고 있는 램프(20)들을 램프 반사판(41)이 각각 반원형으로 감싸고 있으며, 도광판(31)의 아래에는 도광판(31)의 하부면에 대응하는 형상의 반사판(51)이 부착되어 있다.As shown, the LCD panel 10 and both side surfaces of the light guide plate 31 under the LCD panel 10 are inclined downward into the light guide plate 31, and the bottom surface of the light guide plate 31 is centered on the light guide plate 31. The light guide plate 31 is formed to be inclined downward on both sides of the light guide plate 31, and the lamp reflection plates 41 respectively surround the light guide plate 31 in a semicircular shape on both sides of the light guide plate 31. Below the 31, a reflecting plate 51 having a shape corresponding to the lower surface of the light guide plate 31 is attached.
이하 본 발명의 액정 표시 장치의 백라이트 작용을 설명하면 다음과 같다.Hereinafter, the backlight operation of the liquid crystal display of the present invention will be described.
램프(20)들에서 방사된 빛은 램프 반사판(41)이 램프(20)를 각각 감싸므로써 램프(20)의 열 발생을 감소시키고, 램프(20)의 빛이 서로 충돌하여 발생하는 빛의 감소 현상을 줄임으로써 빛효율이 증가된다. 또한, 도광판(31)에 입사된 빛은 도광판(31)의 중심으로 갈수록 반사횟수가 많아지고, 램프(20)가 위치해 있는 면에서는 도광판(31)이 램프의 직광을 받을 수 있게 되어 광 균일성이 향상된다.The light emitted from the lamps 20 reduces the heat generation of the lamp 20 by the lamp reflector 41 respectively surrounding the lamp 20, and reduces the light generated by the light of the lamp 20 collide with each other. By reducing the phenomenon, the light efficiency is increased. In addition, the light incident on the light guide plate 31 increases as the number of reflections increases toward the center of the light guide plate 31. On the surface where the lamp 20 is located, the light guide plate 31 can receive the direct light of the lamp, thereby providing uniformity of light. This is improved.
한편, 상기 도광판(31)의 양측면을 하나, 또는 램프(20)들과 대향하는 수만큼 홈을 형성할 수 있으며, 램프 반사판(41)에 각을 형성하여 빛의 경로를 지정함으로써 광효율을 향상시킬 수 있다.On the other hand, one side of each of the light guide plate 31, or as many grooves facing the lamps 20 can be formed, by forming an angle on the lamp reflector 41 to improve the light efficiency by specifying the path of light Can be.
상기에서 설명한 바와 같이, 본 발명은 램프들을 각각 램프 반사판이 감싸므로써 열이 발생되는 것을 줄이고, 램프에서 발생하는 빛의 충돌을 방지하며, 램프들에서 방사된 빛이 도광판의 중심으로 갈수록 반사횟수가 많아지고, 램프가 위치해 있는 면에서는 램프의 직광을 받을 수 있게 되어 광 균일성이 향상된다.As described above, the present invention reduces the generation of heat by wrapping the lamp reflector plate, respectively, to prevent the collision of light generated from the lamp, the number of reflections of the light emitted from the lamp toward the center of the light guide plate On the surface where the lamp is located, the direct light of the lamp can be received and the light uniformity is improved.
Claims (5)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019960042612A KR100414882B1 (en) | 1996-09-25 | 1996-09-25 | Backlight structure of lcd for optical uniformity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019960042612A KR100414882B1 (en) | 1996-09-25 | 1996-09-25 | Backlight structure of lcd for optical uniformity |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR19980023174A true KR19980023174A (en) | 1998-07-06 |
| KR100414882B1 KR100414882B1 (en) | 2004-05-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1019960042612A KR100414882B1 (en) | 1996-09-25 | 1996-09-25 | Backlight structure of lcd for optical uniformity |
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| Country | Link |
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| KR (1) | KR100414882B1 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100394235B1 (en) * | 2000-12-12 | 2003-08-06 | 현 석 조 | Multi-layer lighting display pannel and the activation apparatus |
| KR20040012393A (en) * | 2002-08-03 | 2004-02-11 | 삼성전자주식회사 | Back light assembly and liquid crystal display |
| KR100485010B1 (en) * | 1998-02-11 | 2005-08-05 | 삼성전자주식회사 | LCD Display |
| KR100660047B1 (en) * | 2005-12-01 | 2006-12-20 | 제일모직주식회사 | Light guide panel for tft-lcd back light unit, tft-lcd back light unit and tft-lcd device thereby |
| KR100789138B1 (en) * | 2001-09-05 | 2007-12-27 | 삼성전자주식회사 | Illumination device and reflection type liquid crystal display device using the same |
| KR100914875B1 (en) * | 2005-08-26 | 2009-08-31 | 고쿠리츠다이가쿠호진 도호쿠다이가쿠 | Liquid crystal display and light guide plate |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101607964B1 (en) | 2009-07-15 | 2016-04-01 | 엘지디스플레이 주식회사 | Transparent display device |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06102414A (en) * | 1991-06-27 | 1994-04-15 | Nitsusen Kagaku Kk | Light guide plate and surface lighting fitting |
| JPH05142536A (en) * | 1991-09-30 | 1993-06-11 | Toshiba Lighting & Technol Corp | Illuminator |
| JPH06160638A (en) * | 1992-11-24 | 1994-06-07 | Stanley Electric Co Ltd | Illumination device and manufacture thereof |
| JPH08220346A (en) * | 1995-02-09 | 1996-08-30 | Alpine Electron Inc | Iluminating device |
-
1996
- 1996-09-25 KR KR1019960042612A patent/KR100414882B1/en not_active IP Right Cessation
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100485010B1 (en) * | 1998-02-11 | 2005-08-05 | 삼성전자주식회사 | LCD Display |
| KR100394235B1 (en) * | 2000-12-12 | 2003-08-06 | 현 석 조 | Multi-layer lighting display pannel and the activation apparatus |
| KR100789138B1 (en) * | 2001-09-05 | 2007-12-27 | 삼성전자주식회사 | Illumination device and reflection type liquid crystal display device using the same |
| KR20040012393A (en) * | 2002-08-03 | 2004-02-11 | 삼성전자주식회사 | Back light assembly and liquid crystal display |
| KR100914875B1 (en) * | 2005-08-26 | 2009-08-31 | 고쿠리츠다이가쿠호진 도호쿠다이가쿠 | Liquid crystal display and light guide plate |
| KR100660047B1 (en) * | 2005-12-01 | 2006-12-20 | 제일모직주식회사 | Light guide panel for tft-lcd back light unit, tft-lcd back light unit and tft-lcd device thereby |
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| Publication number | Publication date |
|---|---|
| KR100414882B1 (en) | 2004-05-31 |
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