KR20030040851A - Monolithic planar illuminant for liquid crystal display - Google Patents
Monolithic planar illuminant for liquid crystal display Download PDFInfo
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- KR20030040851A KR20030040851A KR1020010071438A KR20010071438A KR20030040851A KR 20030040851 A KR20030040851 A KR 20030040851A KR 1020010071438 A KR1020010071438 A KR 1020010071438A KR 20010071438 A KR20010071438 A KR 20010071438A KR 20030040851 A KR20030040851 A KR 20030040851A
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- light
- liquid crystal
- crystal display
- emitting device
- light emitting
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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
-
- 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
- G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/0045—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it by shaping at least a portion of the light guide
- G02B6/0046—Tapered light guide, e.g. wedge-shaped light guide
-
- 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
- G02B6/0066—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 characterised by the light source being coupled to the light guide
-
- 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
- G02F1/133524—Light-guides, e.g. fibre-optic bundles, louvered or jalousie light-guides
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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
Description
본 발명은 액정디스플레이용 발광장치에 관한 것으로 더욱 상세하게는 점광원, 광가이드 및 도광판이 일체형으로 제작된 면발광장치에 관한 것이다.The present invention relates to a light emitting device for a liquid crystal display, and more particularly, to a surface light emitting device in which a point light source, a light guide and a light guide plate are integrally manufactured.
액정디스플레이의 경우에는 자발광 디스플레이가 아니므로 외부 광원을 필요로 한다. 이 때 광원으로는 CCFL과 같은 선형광원이나 발광다이오드와 같은 점광원이 사용되고 있다.In the case of a liquid crystal display, since it is not a self-luminous display, an external light source is required. At this time, a linear light source such as CCFL or a point light source such as a light emitting diode is used as the light source.
그러나 CCFL은 교류전압에서만 작동하기 때문에 반드시 인버터가 있어야 하고 소비전력이 높기 때문에 소형 이동기기나 휴대용 기기에 적합하지 않다는 단점이 있다.However, since the CCFL operates only at AC voltage, it must be equipped with an inverter and is not suitable for small mobile or portable devices because of high power consumption.
발광다이오드와 같은 점광원을 사용하는 경우에는 직류전압을 사용하기 때문에 인버터를 사용할 필요가 없고 소비전력이 낮다는 장점이 있으나, 광원의 특성상 액정디스플레이의 광원으로서 갖추어야 할 균일한 면발광 특성을 만족시키기 힘들었다. 따라서 발광다이오드와 같은 점광원을 그대로 사용하는 경우에는 도광판의 패턴 형성이 복잡해지고 프론트라이트에 사용할 경우 광효율이 떨어질 뿐만 아니라 휘도분포가 급격히 변하여 부분적으로 음영이 발생하는 문제점이 있었다.In the case of using a point light source such as a light emitting diode, since it uses a DC voltage, there is no need to use an inverter and power consumption is low.However, in order to satisfy the uniform surface light emission characteristics to be provided as a light source of a liquid crystal display, It was hard. Therefore, when a point light source such as a light emitting diode is used as it is, the pattern formation of the light guide plate is complicated, and when it is used for the front light, the light efficiency is decreased, and the luminance distribution is rapidly changed, thereby causing partial shadows.
그래서 점광원을 사용하는 경우에는 광가이드를 따로 장착하여 점광원의 특성을 선형광원으로 변화시켜 도광판에 입사시킴으로서 광효율 및 발광특성을 개선하여 왔다.Therefore, in the case of using a point light source, the light guides are separately installed to change the characteristics of the point light source into a linear light source and incident on the light guide plate, thereby improving light efficiency and light emission characteristics.
그러나 광가이드를 사용하는 경우에 광가이드를 도광판과 조립하여야 하기 때문에 조립 공정이 불완전한 경우 광 경로에 이상이 발생하여 광원으로서의 효율이 떨어지는 문제점이 있었다.However, when the light guide is used, the light guide has to be assembled with the light guide plate, and thus, when the assembly process is incomplete, an abnormality occurs in the optical path, thereby degrading efficiency as a light source.
본 발명은 이와 같은 문제점을 해결하기 위한 것으로, 본 발명의 목적은 발광다이오드와 같은 점광원을 발광원으로 사용하는 경우 광의 입사각 등의 특성을 제어하기 위하여 광가이드 구조체를 사용하고 점광원, 광가이드 및 도광판이 일체형으로 제작된 액정디스플레이용 일체형 면발광 장치를 제공하는 것이다.The present invention is to solve such a problem, an object of the present invention is to use a light guide structure to control the characteristics such as the angle of incidence of light when using a point light source such as a light emitting diode as a light emitting source and a point light source, light guide And an integrated surface light emitting device for a liquid crystal display in which the light guide plate is integrally manufactured.
도 1은 본 발명의 실시 예에 따른 면발광장치의 개략도이다.1 is a schematic diagram of a surface light emitting device according to an embodiment of the present invention.
도 2는 본 발명의 실시 예에 따른 면발광 장치의 광 가이드의 출사면과 도광판의 인접부를 상세히 나타낸 도면이다.2 is a view illustrating in detail a neighboring portion of an exit surface of a light guide and a light guide plate of a surface light emitting device according to an exemplary embodiment of the present invention.
도 3은 본 발명의 실시 예에 따른 면발광 장치의 광경로를 나타내는 도면이다.3 is a view showing an optical path of the surface light emitting device according to an embodiment of the present invention.
상기한 목적을 달성하기 위하여 본 발명의 면발광 장치는 점광원, 광가이드,도광판을 일체형으로 제작하여 광 경로 제어가 용이하도록 하였다.In order to achieve the above object, the surface light emitting device of the present invention is made of a point light source, a light guide, a light guide plate in one piece to facilitate the light path control.
본 발명의 면발광 장치는 발광다이오드와 같은 점광원에서 나온 빛을 광가이드를 통하여 선형광으로 광 특성을 변형시키고 변형된 선형광이 도광판에 입사되도록 설계된다.The surface light emitting device of the present invention is designed such that light from a point light source such as a light emitting diode is modified to linear light through a light guide, and the modified linear light is incident on the light guide plate.
도 1은 본 발명의 실시 예에 따른 면발광장치의 개략도이다.1 is a schematic diagram of a surface light emitting device according to an embodiment of the present invention.
도 1에 도시된 바와 같이 본 발명의 면발광장치는 광원장착부(1), 광 가이드(2), 도광판(3)으로 구성되어 있다.As shown in FIG. 1, the surface light emitting device of the present invention includes a light source mounting part 1, a light guide 2, and a light guide plate 3.
상기 광원장착부(1)는 발광다이오드와 같은 점광원을 장착하기 위한 것으로 사용하고자 하는 광원을 용이하게 장착할 수 있도록 사용하고자 하는 광원에 따라 다르게 만들어진다.The light source mounting unit 1 is for mounting a point light source such as a light emitting diode, and is made differently according to a light source to be used to easily mount a light source to be used.
상기 광 가이드(2)는 발광다이오드와 같은 점광원에서 나온 빛을 선형광으로 광특성을 변형시키는 기능을 수행한다.The light guide 2 performs a function of modifying optical characteristics of light emitted from a point light source such as a light emitting diode into linear light.
상기 도광판(3)은 상기 광 가이드(2)를 통해 나온 빛을 반사시켜 액정으로 입사시키는 기능을 수행한다.The light guide plate 3 performs a function of reflecting light emitted through the light guide 2 and incident light into the liquid crystal.
또한 본 발명의 면발광장치는 면발광장치를 액정패널과 조립할 때 정확한 위치에 장착될 수 있도록 얼라인(align)용 홈 또는 돌기가 형성되어 있다.In addition, the surface light emitting device of the present invention is formed with alignment grooves or protrusions so that the surface light emitting device can be mounted at the correct position when assembling the surface light emitting device.
본 발명의 일체형 면발광장치는 사출공정을 이용하여 제작될 수 있다. 사출공정에 의한 도광판 등의 제조공정은 널리 알려져 있으므로 여기서는 상세한 설명을 생략한다.The integrated surface light emitting device of the present invention can be manufactured using an injection process. Since manufacturing processes, such as a light guide plate by an injection process, are widely known, detailed description is abbreviate | omitted here.
도 2는 본 발명의 실시 예에 따른 면발광 장치의 광 가이드의 출사면과 도광판의 인접부를 상세히 나타낸 도면이다.2 is a view illustrating in detail a neighboring portion of an exit surface of a light guide and a light guide plate of a surface light emitting device according to an exemplary embodiment of the present invention.
도 2에 도시된 바와 같이 상기 광가이드(2)의 출사면과 상기 도광판(3)의 인접부에는 최적의 광효율을 얻기 위해 상기 광가이드(2)의 출사면과 상기 도광판(3)의 입사면에 프리즘 형태 또는 쐐기 형태 등의 패턴이 형성되어 있다.As shown in FIG. 2, an exit surface of the light guide 2 and an entrance surface of the light guide plate 3 are disposed at an exit surface of the light guide 2 and an adjacent portion of the light guide plate 3 to obtain an optimum light efficiency. A pattern such as a prism shape or a wedge shape is formed in the groove.
또한 상기 광가이드(2)의 출사면 반대편에는 출사면 쪽으로 빛이 효율적으로 출사될 수 있도록 프리즘, 계단, 다각기둥 등의 패턴이 형성되어 광출사 특성을 향상시킨다.In addition, a pattern such as a prism, a staircase, a polygonal pillar, and the like is formed on the opposite side of the exit surface of the light guide 2 so that light can be efficiently emitted toward the exit surface, thereby improving the light output characteristics.
또한 출사면을 제외한 나머지 면들은 빛의 손실을 막기 위해 반사구조물 또는 반사체로 둘러싸여 있다.In addition, the surfaces other than the exit surface are surrounded by a reflective structure or reflector to prevent the loss of light.
도 3은 본 발명의 실시 예에 따른 면발광 장치의 광경로를 나타내는 도면이다.3 is a view showing an optical path of the surface light emitting device according to an embodiment of the present invention.
도 3에 도시된 바와 같이 발광다이오드와 같은 점광원에서 입사한 빛은 상기 광가이드(2)를 거치면서 선형광으로 형태가 바뀌고, 상기 광가이드(2)의 출사면과 상기 도광판(3)의 입사면을 거쳐서 도광판에 입사된 후 상기 도광판(3)의 반사면에서 반사되어 액정으로 입사된다.As shown in FIG. 3, light incident from a point light source such as a light emitting diode is changed into linear light while passing through the light guide 2, and the exit surface of the light guide 2 and the light guide plate 3 are separated from each other. After being incident on the light guide plate through the incident surface, the light is reflected by the reflective surface of the light guide plate 3 and incident on the liquid crystal.
이상에서 설명한 바와 같이 본 발명에 따르면 광원장착부, 광가이드 및 도광판을 일체적으로 제작하고 광가이드의 출사면과 도광판의 입사면의 형태를 변형하여 효과적인 광제어가 가능하다.As described above, according to the present invention, the light source mounting portion, the light guide, and the light guide plate are integrally manufactured, and the shape of the exit surface of the light guide and the incident surface of the light guide plate can be effectively controlled.
비록 본 발명이 상기에서 언급한 바람직한 실시 예와 관련하여 설명되어졌지만, 본 발명의 요지와 범위로부터 벗어남이 없이 다른 다양한 수정 및 변경이 가능할 것이다. 따라서 첨부된 청구의 범위는 본 발명의 진정한 범위 내에 속하는 그러한 수정 및 변형을 포함할 것이라고 여겨진다.Although the invention has been described in connection with the preferred embodiments mentioned above, other various modifications and changes may be made without departing from the spirit and scope of the invention. It is therefore contemplated that the appended claims will cover such modifications and variations as fall within the true scope of the invention.
Claims (11)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020010071438A KR20030040851A (en) | 2001-11-16 | 2001-11-16 | Monolithic planar illuminant for liquid crystal display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020010071438A KR20030040851A (en) | 2001-11-16 | 2001-11-16 | Monolithic planar illuminant for liquid crystal display |
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| Publication Number | Publication Date |
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| KR20030040851A true KR20030040851A (en) | 2003-05-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1020010071438A KR20030040851A (en) | 2001-11-16 | 2001-11-16 | Monolithic planar illuminant for liquid crystal display |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100742562B1 (en) * | 2005-10-11 | 2007-07-25 | 제일모직주식회사 | Light guide panel and light diffusion sheet for LCD back light unit and LCD back light unit, LCD thereby |
| KR100809224B1 (en) | 2006-12-11 | 2008-02-29 | 삼성전기주식회사 | Back light unit having a light guide buffer plate |
| KR100981850B1 (en) * | 2008-01-24 | 2010-09-13 | 포모사 에피택시 인코포레이션 | Light emitting diode with higher illumination efficiency |
| KR101309260B1 (en) * | 2012-02-27 | 2013-09-17 | 영남대학교 산학협력단 | Backlight unit |
-
2001
- 2001-11-16 KR KR1020010071438A patent/KR20030040851A/en not_active Application Discontinuation
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100742562B1 (en) * | 2005-10-11 | 2007-07-25 | 제일모직주식회사 | Light guide panel and light diffusion sheet for LCD back light unit and LCD back light unit, LCD thereby |
| KR100809224B1 (en) | 2006-12-11 | 2008-02-29 | 삼성전기주식회사 | Back light unit having a light guide buffer plate |
| KR100981850B1 (en) * | 2008-01-24 | 2010-09-13 | 포모사 에피택시 인코포레이션 | Light emitting diode with higher illumination efficiency |
| KR101309260B1 (en) * | 2012-02-27 | 2013-09-17 | 영남대학교 산학협력단 | Backlight unit |
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