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KR100785575B1 - Light guide plate for uniform scattering of light from point sources - Google Patents

Light guide plate for uniform scattering of light from point sources Download PDF

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Publication number
KR100785575B1
KR100785575B1 KR1020050008011A KR20050008011A KR100785575B1 KR 100785575 B1 KR100785575 B1 KR 100785575B1 KR 1020050008011 A KR1020050008011 A KR 1020050008011A KR 20050008011 A KR20050008011 A KR 20050008011A KR 100785575 B1 KR100785575 B1 KR 100785575B1
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guide plate
light
light guide
diffuser
light source
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KR20060087143A (en
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쟈인 쟝
관링 쳉
관둔 젠
웬룽 류
웅옌 젠
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레디언트 옵토-일렉트로닉스 코포레이션
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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
    • G02F1/133524—Light-guides, e.g. fibre-optic bundles, louvered or jalousie light-guides
    • 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)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Planar Illumination Modules (AREA)

Abstract

본 발명은 점광원으로부터의 빛의 균일한 산란을 위한 도광판에 관한 것으로, 점광원으로부터 방출된 빛을 균일하게 산란시킬 수 있는 도광판을 제고한다. 도광판은 투과면(light exiting side), 투과면의 맞은편에 형성된 반사면(reflection side) 및 입사면(light entering side)을 포함한다. 입사면에는 다수의 소형 확산체(diffusing entity)가 형성된다. 각각의 확산체는 하나의 곡면과 곡면의 양단으로부터 연장되어 형성되는 두개의 경사면을 갖는다. 곡면은 광원으로부터의 빛을 다양한 크기의 각도로 굴절시킨다. 이처럼, 광원으로부터 방출된 빛은 더 넓은 입사각을 갖을 수 있고, 도광판 내부로 균일하게 산란될 수 있다.The present invention relates to a light guide plate for uniform scattering of light from a point light source, to improve the light guide plate that can uniformly scatter light emitted from the point light source. The light guide plate includes a light exiting side, a reflection side formed on the opposite side of the transmission surface, and a light entering side. At the entrance face, a number of small diffusing entities are formed. Each diffuser has one curved surface and two inclined surfaces extending from both ends of the curved surface. The curved surface refracts light from the light source at various magnitudes of angles. As such, light emitted from the light source can have a wider angle of incidence and can be uniformly scattered into the light guide plate.

도광판, 투과면, 반사면, 입사면, 확산체, 확산홈Light guide plate, transmissive surface, reflective surface, incident surface, diffuser, diffused groove

Description

점광원으로부터의 빛의 균일한 산란을 위한 도광판{LIGHT GUIDE PLATE FOR UNIFORMLY SCATTERING LIGHTS FROM POINT LIGHT SOURCE}LIGHT GUIDE PLATE FOR UNIFORMLY SCATTERING LIGHTS FROM POINT LIGHT SOURCE}

도 1은 종래의 평면광원의 사시 분해도이다.1 is a perspective exploded view of a conventional planar light source.

도 2는 빛의 경로를 나타내는 종래 도광판의 측면 구성도이다.2 is a side configuration diagram of a conventional light guide plate showing a path of light.

도 3은 점광원으로부터의 빛의 경로를 나타내는 종래 도광판의 평면 구성도이다.3 is a plan view of a conventional light guide plate showing a path of light from a point light source.

도 4는 점광원으로부터의 빛의 경로를 나타내는 다른 종래 도광판의 평면 구성도이다.4 is a plan view of another conventional light guide plate showing a path of light from a point light source.

도 5는 도 4에 도시된 도광판의 다른 평면 구성도이다.FIG. 5 is another plan view illustrating the light guide plate of FIG. 4.

도 6은 본 발명의 제 1 실시예에 따른 도광판의 사시도이다.6 is a perspective view of a light guide plate according to a first embodiment of the present invention.

도 7은 빛의 경로를 나타내는 본 발명의 제 1 실시예에 따른 도광판의 확대된 평면 구성도이다.7 is an enlarged plan view of a light guide plate according to a first embodiment of the present invention showing a path of light.

도 8은 본 발명의 제 2 실시예에 따른 도광판의 사시도이다.8 is a perspective view of a light guide plate according to a second embodiment of the present invention.

도 9는 본 발명의 제 3 실시예에 따른 도광판의 사시도이다.9 is a perspective view of a light guide plate according to a third embodiment of the present invention.

도 10은 본 발명의 제 4 실시예에 따른 도광판의 사시도이다.10 is a perspective view of a light guide plate according to a fourth embodiment of the present invention.

도 11은 본 발명의 제 5 실시예에 따른 도광판의 사시도이다.11 is a perspective view of a light guide plate according to a fifth embodiment of the present invention.

도 12는 빛의 경로를 나타내는 도 11에 도시된 도광판의 평면 구성도이다.FIG. 12 is a plan view illustrating the light guide plate of FIG. 11 showing a path of light.

도 13은 본 발명의 제 6 실시예에 따른 도광판의 평면 구성도이다.13 is a plan view illustrating a light guide plate according to a sixth embodiment of the present invention.

도 14는 본 발명의 제 7 실시예에 따른 도광판의 평면 구성도이다.14 is a plan view illustrating a light guide plate according to a seventh embodiment of the present invention.

도 15는 본 발명의 제 8 실시예에 따른 도광판의 사시도이다.15 is a perspective view of a light guide plate according to an eighth embodiment of the present invention.

도 16은 도 15에 도시된 A-A선의 단면을 나타낸 단면도이다.FIG. 16 is a cross-sectional view illustrating a cross section taken along a line A-A shown in FIG. 15.

본 발명은 박막 트랜지스터 액정 표시 장치(TFT-LCD)의 도광판에 관한 것으로, 더욱 구체적으로는 빛의 입사각을 넓힘으로써 점광원으로부터의 빛의 균일한 산란을 위한 도광판에 관한 것이다.The present invention relates to a light guide plate of a thin film transistor liquid crystal display (TFT-LCD), and more particularly, to a light guide plate for uniform scattering of light from a point light source by widening an incident angle of light.

도 1을 참조하면, 박막 트랜지스터 액정 표시 장치(TFT-LCD)에 설치된 전형적인 평면광원은 도광판(11), 반사판(12), 다수의 확산막(diffusion film)(13) 그리고 프리즘 시트(prism sheet)(14) 및 램프(lamp)(15)를 포함한다. 평면광원(1)의 주요 성분 중의 하나로써, 도광판(11)은 램프(15)로부터 방출된 빛을 수송하고, 방향 전환시킨다.Referring to FIG. 1, a typical planar light source installed in a thin film transistor liquid crystal display (TFT-LCD) includes a light guide plate 11, a reflection plate 12, a plurality of diffusion films 13, and a prism sheet. 14 and a lamp 15. As one of the main components of the planar light source 1, the light guide plate 11 transports and redirects the light emitted from the lamp 15.

도 2를 참조하면, 도광판(11)은 일반적으로 직사각형이고, 투과면(light exiting side)(111), 투과면(111)의 맞은편에 형성된 반사면(reflection side)(112) 및 측부에 형성된 적어도 하나의 입사면(light entering side)(113)을 포함한다. 램프(lamp)(15)로부터 방출된 빛은 입사면(113)을 통해 도광판(11) 내부로 입사되고, 빛의 일부는 투과면(111)을 통해 곧바로 도광판(11)에서 투과되며, 나머지는 반사면(112)에 도달한다. 따라서, 반사면(112)은 표면위에 수많은 도트(dot)들(1121)을 배열하고, 투과면(111)으로 가능한 한 많은 빛을 반사시키기 위해서, 도트(1121)들이 램프(15)로부터 먼거리에 위치할수록 도트(1121)들은 점차 더 높은 분포 밀도 도는 더 넓은 표면적을 갖는다.Referring to FIG. 2, the light guide plate 11 is generally rectangular, and has a light exiting side 111, a reflection side 112 formed on the opposite side of the transmission surface 111, and a side surface thereof. At least one light entering side 113 is included. Light emitted from the lamp 15 is incident into the light guide plate 11 through the incident surface 113, and a part of the light is transmitted through the light guide plate 11 directly through the transmission surface 111, and the rest is Reach the reflective surface 112. Thus, the reflecting surface 112 arranges a number of dots 1121 on the surface, and the dots 1121 are arranged at a distance from the lamp 15 in order to reflect as much light as possible to the transmissive surface 111. As positioned, dots 1121 have an increasingly higher distribution density or larger surface area.

일반적으로, 냉음극형광램프(CCFL) 또는 발광다이오드(LED)가 평면광원(1)의 램프(15)로써 사용된다. CCFL의 평면광원에의 적용은 선형광원에의 적용과 비슷하다. 반면에, LED의 평면광원에의 적용은 점광원에의 적용보다 더 복잡하다. 도 3을 참조하면, LED(16)로부터 방출된 빛은 입사면(113)을 통해 도광판(11)으로 입사될 때, 하나의 입사각을 갖는다. 따라서, 도광판(11) 내부에는 입사광선 도달범위인지의 여부에 따라 밝은 부분(114)과 어두운 부분(115)이 형성된다. LED(16)를 더 추가하여 어두운 부분(115)을 제거할 수 있다하더라도, 이는 추가된 LED(16)가 재료비용, 소비전력, 조립 복잡성 및 미래의 기능장애 가능성을 증가시키기 때문에, 만족할만한 접근이 아니다.Generally, a cold cathode fluorescent lamp (CCFL) or a light emitting diode (LED) is used as the lamp 15 of the planar light source 1. The application of CCFLs to planar light sources is similar to that of linear light sources. On the other hand, the application of the LED to the planar light source is more complicated than the application to the point light source. Referring to FIG. 3, the light emitted from the LED 16 has one incident angle when it is incident on the light guide plate 11 through the incident surface 113. Therefore, the light portion 114 and the dark portion 115 are formed in the light guide plate 11 depending on whether the incident light reaches the light beam. Although additional LEDs 16 may be added to remove the dark portion 115, this is a satisfactory approach, since the added LEDs 16 increase material costs, power consumption, assembly complexity, and the potential for future malfunctions. This is not it.

도 4를 참조하면, 어두운 부분을 제거하는 다른 방법이 제공된다. 도 4에서, 도광판(2)은 투과면(21), 투과면(21)의 맞은편에 형성된 반사면(22) 및 측부에 형성된 적어도 하나의 입사면(23)을 포함한다. 입사면(23)에는 다수의 톱니 형태 확산체(231)가 배열되어 있다. LED(25)로부터 방출된 빛은 확산체(231)의 경사면(2311)들을 통해 통과될 때, 더 넓은 입사각을 가지고 산란된다. 이로써, 도광판(2) 내부의 어두운 부분(234)이 축소된다. 그러나 이러한 접근에도 문제가 발생한다. 도 5를 참조하면, LED(25)로부터 방출된 빛이 확산체(231)를 통해 통과될 때, 그 빛은 확산체(231) 각각의 두개의 경사면(2311)에 의해 굴절되고, 굴절된 빛 중에는 진행방향이 일정한 방향으로 정렬되는 것도 있다. 이러한 정렬된 굴절광은 더 밝은 빛(26)을 형성하도록 서로를 보강하며, 그 결과 도광판(2)의 균일하지 않은 명암을 초래한다. 이러한 현상은 도광판(2)의 다음 적용을 제한하고, 도광판(2)의 균일한 명암 필요조건을 충족시키지 못한다.Referring to FIG. 4, another method of removing dark portions is provided. In FIG. 4, the light guide plate 2 includes a transmissive surface 21, a reflective surface 22 formed opposite the transmissive surface 21, and at least one incident surface 23 formed at the side. On the incident surface 23, a plurality of sawtooth diffusers 231 are arranged. Light emitted from the LED 25 is scattered with a wider angle of incidence as it passes through the inclined surfaces 2311 of the diffuser 231. As a result, the dark portion 234 inside the light guide plate 2 is reduced. However, problems arise with this approach. Referring to FIG. 5, when light emitted from the LED 25 is passed through the diffuser 231, the light is refracted by the two inclined surfaces 2311 of each of the diffusers 231, and the refracted light In some cases, the advancing direction is aligned in a constant direction. These aligned refractive lights reinforce each other to form brighter light 26, resulting in non-uniform contrast of the light guide plate 2. This phenomenon limits the next application of the light guide plate 2 and does not meet the uniform contrast requirements of the light guide plate 2.

따라서, 본 발명의 목적은 점광원으로부터의 빛을 균일하게 산란시킬 수 있는 도광판을 제공하는 데에 있다. Accordingly, an object of the present invention is to provide a light guide plate capable of uniformly scattering light from a point light source.

도 6을 참조하면, 도광판(3)은 투명한 기판이다. 도광판(3)은 투과면(31), 투과면(31)의 맞은편에 형성된 반사면(32) 및 적어도 하나의 입사면(33)을 포함한다.Referring to FIG. 6, the light guide plate 3 is a transparent substrate. The light guide plate 3 includes a transmission surface 31, a reflection surface 32 formed opposite the transmission surface 31, and at least one incident surface 33.

투과면(31)은 광원(도시되지 않음)으로부터의 빛이 전달되는 곳이다. 반사면(32)에는 광원으로부터 방출된 빛이 투과면(31)을 통과하도록 반사시키는 다양한 도트들(도시되지 않음)이 배열된다. 광원으로부터 방출된 빛은 입사면(33)을 통해 도광판(3)의 내부로 입사되고 진행된다. 입사면(33)은 다양한 소형 확산체(331)를 포함하도록 배열된다. 각각의 확산체(331)는 하나의 곡면(3311)과 곡면(3311)의 양단으로부터 연장되어 형성되는 두개의 경사면(3312)을 갖는다.The transmissive surface 31 is where light from a light source (not shown) is transmitted. Reflective surface 32 is arranged with various dots (not shown) that reflect light emitted from the light source to pass through transmissive surface 31. The light emitted from the light source enters into the light guide plate 3 through the incident surface 33 and proceeds. The incident surface 33 is arranged to include various small diffusers 331. Each diffuser 331 has one curved surface 3311 and two inclined surfaces 3312 extending from both ends of the curved surface 3311.

도 7을 참조하면, 광원(LED)(34)으로부터 방출된 빛이 확산체(331)의 곡면(3311)을 통해 통과될 때, 광원(LED)(34)으로부터 방출된 빛은 다양한 크기의 각으 로 굴절된다. 그러나, 두개의 경사면(3312)은 입사각의 좌우측으로 고정된 크기의 굴절각을 제공한다. 따라서, 이 고정된 크기의 각도로 굴절된 빛은 다양한 크기의 각으로 굴절된 빛들과 융합되어 종래 기술에서 형성되는 균일하지 않은 명암의 발생을 방지하게 된다. 즉, 본 발명에 따른 확산체(331)는 점광원으로부터의 빛의 입사각을 확대시킬 뿐 아니라 고정된 크기의 굴절각으로 인한 균일하지 않은 명암의 발생을 방지할 수 있게 한다.Referring to FIG. 7, when the light emitted from the light source (LED) 34 passes through the curved surface 3311 of the diffuser 331, the light emitted from the light source (LED) 34 has various angles. Is refracted by However, the two inclined surfaces 3312 provide a fixed angle of refraction to the left and right sides of the angle of incidence. Thus, the light refracted at this fixed sized angle is fused with light refracted at various sized angles to prevent the occurrence of uneven contrast, which is formed in the prior art. That is, the diffuser 331 according to the present invention not only enlarges the incident angle of light from the point light source, but also prevents the occurrence of uneven contrast due to the fixed angle of refraction.

도 7에 도시된 바와 같이, 입사면(33)에서, 인접한 확산체(331)들 사이에는 작은 틈이 형성되어 있다. 도 8을 참조하면, 산란 효과를 더욱 증가시키기 위해, 확산체(331)는 확산체(331)들 사이에 틈이 형성되지 않도록 계속하여 배열될 수 있다.As shown in FIG. 7, in the incident surface 33, a small gap is formed between adjacent diffusers 331. Referring to FIG. 8, to further increase the scattering effect, the diffuser 331 may be continuously arranged such that no gap is formed between the diffuser 331.

도 9를 참조하면, 확산체(331)가 입사면(33)으로부터 돌출되도록 형성되는 것에 더하여, 확산체(331)는 도광판(3)의 내부로 오목하게 들어가 배열될 수 있다. 오목한 곡면(3311)과 경사면(3312)은 LED(34)로부터의 빛의 입사각을 더 넓게하고, 도광판(3) 내부로 빛을 균일하게 산란시킨다. 이는 본 발명의 선행 실시예들과 동일하다.Referring to FIG. 9, in addition to the diffuser 331 protruding from the incident surface 33, the diffuser 331 may be concave into the light guide plate 3 and arranged. The concave curved surface 3311 and the inclined surface 3312 widen the angle of incidence of light from the LED 34 and evenly scatter the light into the light guide plate 3. This is the same as the preceding embodiments of the present invention.

도 9를 참조하면, 인접한 오목한 확산체(331)들 사이에는 작은 틈이 있다. 도 10을 참조하면, 도 8에서 도시된 바와 같이 확산체(331)는 산란 효과를 더욱 증가시키기 위해, 확산체(331)들 사이에 틈이 형성되지 않도록 연속적으로 배열될 수 있다.Referring to FIG. 9, there is a small gap between adjacent concave diffusers 331. Referring to FIG. 10, as shown in FIG. 8, the diffusers 331 may be continuously arranged such that no gap is formed between the diffusers 331 to further increase the scattering effect.

도 11을 참조하면, 확산체(331)의 표면에 다양한 오목 V-형 확산홈(332)을 형성함으로써, 선행 실시예들의 산란 효과는 증대될 수 있다. 이 확산홈(332)은 반사면(32)으로부터 투과면(31)까지 평행하게 정렬되어 형성된다. 도 12를 참조하면, LED(34)로부터 방출된 빛이 입사면(33)을 통해 통과할 때, 그 빛은 확산체(331)에 의해 산란될 뿐 아니라 확산홈(332) 내부의 경사면(3321)에 의해 더 산란된다.Referring to FIG. 11, by forming various concave V-type diffusion grooves 332 on the surface of the diffuser 331, the scattering effect of the preceding embodiments may be increased. The diffusion grooves 332 are formed in parallel alignment from the reflection surface 32 to the transmission surface 31. Referring to FIG. 12, when light emitted from the LED 34 passes through the incident surface 33, the light is not only scattered by the diffuser 331 but also the inclined surface 3331 inside the diffused groove 332. More scattered by).

도 14를 참조하면, 본 발명에 따른 다른 실시예에서, 확산홈(332)은 규칙적인 V-형태를 갖는 대신에, 일정한 산란효과를 지속적으로 획득할 수 있는 불규칙적인 V-형태를 갖을 수 있다.Referring to FIG. 14, in another embodiment according to the present invention, instead of having a regular V-shape, the diffusion groove 332 may have an irregular V-shape capable of continuously obtaining a constant scattering effect. .

입사면(33)의 인접한 확산체(331)들 사이에 틈이 형성된 실시예들에서, 틈 역시 표면에 확산홈(332)을 포함하도록 배열될 수 있다. 이로써, LED(34)로부터 방출된 빛은 확산홈(332)의 산란 효과를 이룰 수 있다. In embodiments where a gap is formed between adjacent diffusers 331 of the incident surface 33, the gap may also be arranged to include the diffusion groove 332 in the surface. As a result, the light emitted from the LED 34 may achieve the scattering effect of the diffusion groove 332.

입사면(33)에 확산홈(332)을 포함하는 것 외에도, 확산홈(332)은 투과면(31)의 외면에도 형성될 수 있다. 이로써, LED(34)로부터의 빛은 도광판(3)의 내부로 산란될 뿐 아니라 빛이 투과면(31)을 통해 도광판(3)에서 투과될 때, 더욱 산란될 수 있다. 도 15를 참조하면, 투과면(31)의 확산홈(332)은 도광판(3) 내부의 빛의 진행방향과 평행하게 배열된다. 도 16은 도 15에 도시된 A-A선의 단면을 나타낸 단면도이다. 도 15 및 도 16을 참조하면, 투과면(31)의 확산홈(332)은 확산홈(332)들 사이에 틈이 형성되지 않도록 배열된다. 다른 실시예들에서, 투과면(31)의 인접한 확산홈(332)들 사이에도 틈이 형성될 수 있다.In addition to including the diffusion groove 332 on the incident surface 33, the diffusion groove 332 may be formed on the outer surface of the transmission surface 31. In this way, the light from the LED 34 is not only scattered into the light guide plate 3 but also can be further scattered when the light is transmitted through the light guide plate 3 through the transmission surface 31. Referring to FIG. 15, the diffusion grooves 332 of the transmission surface 31 are arranged in parallel with the traveling direction of the light inside the light guide plate 3. FIG. 16 is a cross-sectional view illustrating a cross section taken along a line A-A shown in FIG. 15. 15 and 16, the diffusion grooves 332 of the transmission surface 31 are arranged such that no gap is formed between the diffusion grooves 332. In other embodiments, a gap may also be formed between adjacent diffusion grooves 332 of the transmission surface 31.

본 발명에 따른 점광원으로부터의 빛의 균일한 산란을 위한 도광판은 도광판 의 입사면에 확산체를 형성하여, 광원으로부터 방출된 빛이 더 넓은 입사각을 갖고, 도광판의 내부로 균일한 산란을 할 수 있다. The light guide plate for uniform scattering of light from the point light source according to the present invention forms a diffuser on the incident surface of the light guide plate, so that the light emitted from the light source has a wider angle of incidence, and can be uniformly scattered into the light guide plate. have.

Claims (8)

도광판의 외부로 빛을 전달하는 투과면(light exiting side);A light exiting side for transmitting light to the outside of the light guide plate; 상기 투과면의 맞은편에 형성되고, 상기 도광판의 내부로 진행되는 상기 빛의 방향이 변하도록 상기 빛을 반사시키는 반사면(reflection side); 및A reflection side formed at the opposite side of the transmission surface and reflecting the light such that the direction of the light traveling inside the light guide plate is changed; And 상기 도광판의 측부에 형성되고, 광원으로부터 상기 빛을 입사시키는 입사면(light entering side);을 포함하는 상기 광원으로부터의 빛의 균일한 산란을 위한 기판 형태를 갖는 도광판에 있어서,In the light guide plate is formed on the side of the light guide plate, the light guide plate having a form for uniform scattering of light from the light source, including; 상기 입사면은 상기 입사면의 표면에 형성된 다수의 소형 확산체(diffusing entity)를 포함하고, 상기 확산체는 하나의 곡면과 상기 곡면의 양단으로부터 각각 연장되어 형성되는 두개의 경사면을 갖는 것을 특징으로 하는 도광판.The incidence surface includes a plurality of small diffusing entities formed on the surface of the incidence surface, and the diffuser has one curved surface and two inclined surfaces each extending from both ends of the curved surface. Light guide plate. 제 1항에 있어서, 각각의 상기 확산체는 연속적으로 배열되어 상기 확산체들 사이에는 틈이 없는 것을 특징으로 하는 도광판.The light guide plate according to claim 1, wherein each of the diffusers is arranged continuously so that there is no gap between the diffusers. 제 1항에 있어서, 각각의 상기 확산체는 상기 확산체의 표면에 상기 도광판 내부로 오목하게 들어가 형성된 다수의 V-형 확산홈(diffusing groove)을 포함하며, 상기 확산홈은 평행하게 정렬되고, 상기 반사면으로부터 상기 투과면까지 연장되어 형성되는 것을 특징으로 하는 도광판. The diffuser of claim 1, wherein each of the diffusers comprises a plurality of V-shaped diffusing grooves recessed into the light guide plate on a surface of the diffuser, the diffuser grooves being aligned in parallel, The light guide plate is formed extending from the reflective surface to the transmission surface. 제 1항에 있어서, 상기 확산체는 상기 도광판의 내부로 오목하게 들어간 것을 특징으로 하는 도광판.The light guide plate according to claim 1, wherein the diffuser is recessed into the light guide plate. 제 3항에 있어서, 상기 확산홈은 확산체들 사이의 상기 입사면의 표면에 더 형성되는 것을 특징으로 하는 도광판.The light guide plate of claim 3, wherein the diffusion groove is further formed on a surface of the incidence surface between the diffusion bodies. 제 3항에 있어서, 상기 확산홈은 상기 투과면의 외면에 더 형성되고, 상기 도광판 내부의 빛의 진행 방향과 평행하게 정렬되는 것을 특징으로 하는 도광판.The light guide plate of claim 3, wherein the diffusion groove is further formed on an outer surface of the transmission surface and is aligned in parallel with a traveling direction of light inside the light guide plate. 제 3항에 있어서, 상기 확산홈은 하나의 규칙적인 단면 형태를 갖는 것을 특징으로 하는 도광판.The light guide plate of claim 3, wherein the diffusion groove has a regular cross-sectional shape. 제 3항에 있어서, 상기 확산홈은 불규칙한 단면 형태들을 갖는 것을 특징으로 하는 도광판.The light guide plate of claim 3, wherein the diffusion grooves have irregular cross-sectional shapes.
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