KR100862699B1 - light guide panel of back light unit - Google Patents

light guide panel of back light unit Download PDF

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Publication number
KR100862699B1
KR100862699B1 KR1020070001088A KR20070001088A KR100862699B1 KR 100862699 B1 KR100862699 B1 KR 100862699B1 KR 1020070001088 A KR1020070001088 A KR 1020070001088A KR 20070001088 A KR20070001088 A KR 20070001088A KR 100862699 B1 KR100862699 B1 KR 100862699B1
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South Korea
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dot
light guide
guide plate
light source
light
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KR1020070001088A
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Korean (ko)
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KR20080064323A (en
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최인상
이목성
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(주)대영오앤이
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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
    • G02B6/0035—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
    • G02B6/0036—2-D arrangement of prisms, protrusions, indentations or roughened surfaces
    • 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
    • G02B6/0038—Linear indentations or grooves, e.g. arc-shaped grooves or meandering grooves, extending over the full length or width of the 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
    • G02B6/0033—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
    • G02B6/0053—Prismatic sheet or layer; Brightness enhancement element, sheet or layer
    • 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
    • G02F1/133504—Diffusing, scattering, diffracting elements
    • 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
    • G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members

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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)
  • Light Guides In General And Applications Therefor (AREA)

Abstract

본 발명은 광원과, 그 광원을 둘러싸는 반사커버(8)와, 광원의 앞에 설치되며 반사커버에 의해 겹쳐지는 오버랩부를 형성하도록 구성되는 도광판의 구조에 있어서, 도광판의 반사면에 불균일 크기의 도트(22)를 형성하되, 광원에서 멀어질수록 그 형성되는 밀도를 높게 구성한 것 특징으로 하며, 상기한 도트(22)의 크기는 2-120㎛ 로 한 것을 특징으로 하며, 상기한 광원 전방에의 반사커버(8)에 의해 겹쳐지는 반사면(12)의 오버랩부(7) 길이는 0.1-3.0mm 인 것을 특징으로 하며, 상기한 광원이 설치되는 오버랩부(7) 앞에는 도트를 설치하지 않은 무도트부(31)를 형성하고, 그 무도트부(31) 좌우에는 도트의 밀집도를 높인 밀집도트부(33)를 형성한 것을 특징으로 하며, 상기한 출사면(11)의 프리즘산(111) 꼭대기 정점은 둥글게 형성시키며, 그 산 꼭대기의 곡률 반경은 0.01-0.05 mm 이며, 프리즘산(111)과 프리즘산(111) 사이에는 평면이 없는 형상인 것을 특징으로 하며, 상기한 도트(22)는 음각으로 형성하는 것을 특징으로 한다In the structure of the light guide plate configured to form a light source, a reflective cover 8 surrounding the light source, and an overlap portion provided in front of the light source and overlapped by the reflective cover, dots of non-uniform size on the reflective surface of the light guide plate are provided. (22) is formed, and the farther away from the light source, the formed density is higher, and the size of the dot 22 is set to 2-120 μm. The length of the overlapping portion 7 of the reflecting surface 12 overlapped by the reflecting cover 8 is 0.1-3.0mm, and no dots are provided in front of the overlapping portion 7 where the light source is installed. The dot part 31 is formed, and the dense dot part 33 which raises the density of a dot is formed in the left and right sides of the dot-free part 31, The prism mountain 111 of the exit surface 11 mentioned above. The top vertex is rounded and the radius of curvature at the top of the mountain 0.01-0.05 mm, characterized in that there is no plane between the prism acid 111 and the prism acid 111, the dot 22 is characterized in that it is formed in an intaglio

백라이트, 도광판, LED Backlight, Light Guide Plate, LED

Description

백라이트 유니트의 도광판{light guide panel of back light unit}Light guide panel of back light unit

도 1 은 종래의 백라이트 유니트에 대한 한 구성예1 is a configuration example of a conventional backlight unit

도 2 는 종래 도광판의 구조를 나타내는 한 예시도면Figure 2 is an exemplary view showing the structure of a conventional light guide plate

도 3 은 본 발명에 따른 도광판의 반사면에 대한 구성을 설명하기 위한 도면. 3 is a view for explaining the configuration of the reflective surface of the light guide plate according to the present invention.

본 발명은 LED(light emitting dioder)의 BLU(back light unit)에서 입광 품질을 개선시킨 도광판(LGP:light guide panel) 구조에 관한 것이다The present invention relates to a light guide panel (LGP) structure having improved light receiving quality in a back light unit (BLU) of a light emitting diode (LED).

예를 들어, 도 1 에 예시한 바와 같이, LED 백라이트 유니트는 제일 저면에 반사시트(1)가 있고, 그 위에 도광판(2)이 설치되고, 도광판(2)의 측부에 광원인 예를 들어 LED(3)가 설치되며, 도광판(2) 위에는 역프리즘시트(4)와 확산시트(5)가 설치된다.For example, as illustrated in FIG. 1, the LED backlight unit has a reflective sheet 1 at the bottom thereof, a light guide plate 2 is provided thereon, and an LED, for example, a light source on the side of the light guide plate 2. (3) is provided, and the reverse prism sheet 4 and the diffusion sheet 5 are provided on the light guide plate 2.

LED(3)는 반사커버(8)에 의해 둘러싸지는데 반사커버(8)의 단부는 도광판(2)과 겹치는 부위가 있다 이 부위를 오버랩부(7)라고 한다. 도광판(2)의 상면 즉, 빛이 출광되는 부위를 상면 또는 출사면(11)이라고 하고 그 반대면을 하면 즉, 반사 면(12)이라고 한다The LED 3 is surrounded by the reflective cover 8, and the end of the reflective cover 8 has a portion overlapping with the light guide plate 2. This portion is called an overlap portion 7. The upper surface of the light guide plate 2, that is, the portion where light is emitted, is called the upper surface or the emitting surface 11 and the opposite surface is called the reflective surface 12.

종래의 도광판의 반사면(12)은 도 2 에 도시한 바와 같이, 일정한 크기의 도트가 LED(광원)에서 멀어질수록 도트 형상의 패턴이 밀집되는 구조로 되어 있다As shown in FIG. 2, the reflective surface 12 of the conventional light guide plate has a structure in which a dot-shaped pattern is denser as the dot of a certain size moves away from the LED (light source).

이렇게 만드는 이유는 균일한 휘도를 얻기 위한 것이다The reason for this is to get uniform brightness.

이와 같은 종래의 구조에서는 LED 에서 즉, 광원에서 빛이 조사되면 두 개의 광원 사이에 간섭부(14)가 생기고 그리고 그에 따라 빛이 나가는 것과 같은 빛 뻗침 현상(시인(SEEN) 현상: 빛이 비추는 것과 같은 직선이 나타남)이 나타난다. In such a conventional structure, when light is emitted from an LED, that is, a light source, an interference portion 14 is formed between two light sources, and accordingly, a light extension phenomenon (SEEN phenomenon) such as light is emitted. Same straight line appears).

본 발명은, 상기한 점을 해결하기 위하여 발명한 것으로, 도광판에 균일한 휘도를 나타내며 외관상 빛이 뻗치는 것이 보이는 듯한 씨인(seen) 현상을 제거하여 도광판의 품질을 더욱 향상시킨 것에 본 발명의 목적이 있다The present invention has been invented to solve the above-described problem, and the object of the present invention is to further improve the quality of the light guide plate by removing a sein phenomenon in which the light guide plate exhibits uniform luminance and looks like light is visible. have

상기한 목적 외의 다른 목적 및 구성에 대하여, 이하 상술한다. Other objects and configurations than those described above will be described below.

상기한 본 발명의 목적을 달성하기 위한 본 발명의 주요 구성은, 광원과, 그 광원을 둘러싸는 반사커버(8)와, 광원의 앞에 설치되며 반사커버에 의해 겹쳐지는 오버랩부를 형성하도록 구성되는 도광판의 구조에 있어서, 도광판의 반사면에 불균일 크기의 도트(22)를 형성하되, 광원에서 멀어질수록 그 형성되는 밀도를 높게 구성한 것 특징으로 하며, 상기한 도트(22)의 크기는 2-120㎛ 로 한 것을 특징으로 하며, 상기한 광원 전방에의 반사커버(8)에 의해 겹쳐지는 반사면의 오버랩부(7) 길이는 0.1-3.0mm 인 것을 특징으로 하며, 상기한 광원이 설치되는 오버랩부(7) 앞에는 도트를 설치하지 않은 무도트부(31)를 형성하고, 그 무도트부(31) 좌우에는 도트의 밀집도를 높인 밀집도트부(33)를 형성한 것을 특징으로 하며, 상기한 출사면(11)의 프리즘산(111) 꼭대기 정점은 둥글게 형성시키며, 그 산 꼭대기의 곡률 반경은 0.01-0.05 mm 이며, 프리즘산(111)과 프리즘산(111) 사이에는 평면이 없는 형상인 것을 특징으로 하며, 상기한 도트(22)는 음각으로 형성하는 것을 특징으로 한다The main constitution of the present invention for achieving the above object of the present invention is a light guide plate configured to form a light source, a reflective cover 8 surrounding the light source, and an overlap portion provided in front of the light source and overlapped by the reflective cover. In the structure of, the non-uniform size of the dot 22 is formed on the reflective surface of the light guide plate, characterized in that the higher the distance formed from the light source is configured to a higher density, the size of the dot 22 is 2-120 It is characterized in that it is characterized in that the overlap portion 7 of the reflecting surface overlapped by the reflecting cover 8 in front of the light source is 0.1-3.0mm, the overlap in which the light source is installed The non-dotted portion 31 having no dot is formed in front of the portion 7, and the dense dot portion 33 having a high degree of density of dots is formed on the left and right sides of the non-dotted portion 31. Top of Prism Mountain (111) on exit surface (11) Is formed round, the radius of curvature of the top of the mountain is 0.01-0.05 mm, characterized in that there is no plane between the prism mountain 111 and the prism mountain 111, the dot 22 is intaglio Characterized by forming

상기한 특징 외의 다른 특징 및 구성에 대하여 이하, 첨부 도면에 의거 추가로 상술한다Other features and configurations other than those described above will be further described below based on the accompanying drawings.

도 3 은 본 발명에 따른 도광판의 상면 즉 반사면(21)을 도시한 것이다3 shows an upper surface, that is, a reflecting surface 21 of the light guide plate according to the present invention.

본 발명에서는 반사면(21)을 무작위로 불균일한 도트(22) 형태로 형성시켰다. 즉, 각각의 도트(22)가 일정한 크기의 동일한 도트가 아니라 사이즈가 각각 다른 도트를 형성시킨다In the present invention, the reflective surface 21 is randomly formed in the form of non-uniform dots 22. That is, each dot 22 forms dots of different sizes rather than the same dot of a constant size.

마치 블라스트 장비로 블라스트 작업한 것과 같은 패턴을 갖도록 한다Have the same pattern as blasting with blast equipment

그 패턴 제작 방법은, 블라스트 장치를 이용하여 금형에 대하여 블라스트 입자를 분사시켜 금형 가공을 한다. 그러면 금형이 블라스트 가공에 의해 금형에 무작위로 미세한 오목한 홈이 형성된다. 이렇게 블라스트 가공된 금형에서 도광판을 복사(형성)하여 내면 표면에 블라스트 가공된 표면이 나온다. In the pattern production method, blast particles are injected onto a mold by using a blasting device to perform mold processing. The mold is then randomly formed with fine concave grooves in the mold by blasting. In the blasted mold, the light guide plate is copied (formed) to give a blasted surface on the inner surface.

참고로 종래 경우, 도광판에 표면에 도트 형태의 구조를 만들어 내는 방법은, 표면 부식으로 만드는 방법과 레이저를 이용하여 도트 형태를 만드는 방법과 다이아 몬드 공구를 이용하여 도트 형태의 형상을 만들어 내어 이를 복사하여 표면 에 도트 형태가 형성되게 하는 등의 방법으로 도광판넬을 만들어 내는 방법이 있다For reference, in the conventional case, a method of forming a dot structure on a surface of a light guide plate is a method of making a surface corrosion, a method of making a dot shape using a laser, and a shape of a dot shape using a diamond tool to copy it. There is a method to make a light guide panel by forming a dot shape on the surface.

도 3 에서 보듯이, 오버랩부(7)에서 위로 올라갈 수록 그 도트(22)의 밀집도를 높여 준다. 오버랩부(7)에는 도트를 형성시키지 않으며, 그리고 LED(3) 설치 위치 부위 전방에는 도트를 형성시키지 않는다. 만약 도트를 넣게 되면 난반사가 심하게 되어 바람직하지 못하다. 그러나 도트를 넣어도 상관 없다. 넣을 경우, 그 상부의 도트 밀도를 조절하면 된다. 오버랩부(7)의 길이는 예를 들어 0.1-3.0 mm 정도로 한다As shown in FIG. 3, the density of the dot 22 is increased as it rises from the overlap portion 7. No dot is formed in the overlap portion 7 and no dot is formed in front of the LED 3 installation position. If dots are put in, the diffuse reflection becomes severe and is undesirable. But it does not matter if I put a dot. What is necessary is just to adjust the dot density in the upper part. The length of the overlap portion 7 is, for example, about 0.1-3.0 mm.

그리고 LED(3) 사이 사이의 부위에는 그 도트(22)의 밀집도를 매우 크게 높였다. 그리하여 이 부위에서 빛을 더욱 심하게 산란시켜, 빛의 뻗치는 형태가 나타나지 않게 하였다. 즉, 이 부위에서 난반사가 이루어지게 하여 부드러운 빛이 되도록 하여 외관이 양호하게 나타나게 하였다In addition, the density of the dot 22 was greatly increased in the portion between the LEDs 3. Thus the light was scattered more severely in this area so that no outward form of light appeared. In other words, the diffuse reflection is made in this area so as to be a soft light appeared good appearance

도 3 의 아래에 있는 도면은 출사면(11)의 단면을 도시한 것으로, 도시한 바와 같이, 표면에 형성시키는 프리즘산(111)과 프리즘산(111) 사이가 평면이 없이 제작되었다. 즉, 프리즘산(111)과 프리즘산(111) 사이에 골만 있지 평면은 없게 만들었다The lower part of FIG. 3 shows the cross section of the emission surface 11, As shown, between the prism mountain 111 and the prism mountain 111 formed in the surface was produced without the plane. That is, between the prism mountain 111 and the prism mountain 111, there is only a valley, but no plane

프리즘산(111)의 산꼭대기의 R(곡률반경)크기는 0.01-0.05 mm 로 하는 것이 바람직하며 프리즘산(111)과 프리즘산(111) 사이의 평면은 존재하지 않게 만든다. 이렇게 프리즘산(111) 사이에 평면이 존재하지 않게 만들면 휘도가 더욱 향상된다The R (curvature radius) size of the top of the prism acid 111 is preferably 0.01-0.05 mm, and there is no plane between the prism acid 111 and the prism acid 111. If the plane does not exist between the prism mountains 111, the luminance is further improved.

반사면(21)의 도트의 크기는 2-120㎛ 로 한다. 즉 종래 보다 더 미세한 크기로 한다. 종래 경우 120 - 300㎛ 정도의 일정한 크기이다. 상기한 구조의 도광판은 도광판의 반사면 반대쪽인 출사면(11)에도 선택적으로 형성시킬 수 있다.The size of the dot of the reflecting surface 21 shall be 2-120 micrometers. That is, the size is finer than the conventional one. In the conventional case, it is a constant size of about 120-300 μm. The light guide plate having the above structure may be selectively formed on the exit surface 11 opposite to the reflective surface of the light guide plate.

또한 본 발명의 변형 실시예로는 돌출 형태의 도트 대신 오목한 음각으로 도트를 만들어도 상기한 것과 동일한 효과를 나타낼 수 있다.In addition, in the modified embodiment of the present invention, even if the dot is made of concave intaglio instead of the protruding dot, the same effect as described above may be obtained.

그 외 본 발명의 기술적 사상의 범위 내에서 여러 변형 실시가 가능함은 물론이다. Besides, various modifications can be made within the scope of the technical idea of the present invention.

상기와 같은 본 발명에 의하면, 양각 또는 음각의 패턴(도트)에 의해 산란-반사 및 전반사의 특징으로 갖는 반사면을 구성하되, 광원이 반사되는 그 부위 즉 오버랩부(7)에서 빛 뻗침 현상이 없이 빛이 난반사되어 광확산성을 높여주어 부드럽게 출사되므로, 외관과 광효율 품질을 더욱 향상시킬 수 있는 효과가 있다. According to the present invention as described above, the reflective surface having the characteristics of scattering-reflection and total reflection by the embossed or intaglio pattern (dot), but the light stretching phenomenon in the portion where the light source is reflected, that is, the overlapping portion 7 Because light is diffused without reflection, the light diffusivity is increased to emit light smoothly, and thus the appearance and light efficiency quality can be further improved.

또한 본 발명에서는 도광판의 프리즘산 사이에 평면이 존재하지 않음으로 인해 종래 보다 휘도를 더욱 향상시킬 수 있었다.In addition, in the present invention, since the plane does not exist between the prism acids of the light guide plate, the luminance may be further improved than before.

Claims (6)

광원과, 그 광원을 둘러싸는 반사커버(8)와, 광원의 앞에 설치되어 상면이 출사면(11)을 그리고 하면이 반사면을 이루며, 반사커버(8)로 단부 일부가 덮혀지는 오버랩부(7)가 형성되도록 구성되는 도광판의 구조에 있어서,The light source, the reflective cover 8 surrounding the light source, and an overlap portion provided in front of the light source, the upper surface of which forms an exit surface 11, and the lower surface of which forms a reflective surface, and whose portion is covered by the reflective cover 8 ( In the structure of the light guide plate configured to form 7), 도광판의 반사면에 불균일 크기의 도트(22)를 형성하되, 광원에서 멀어질수록 그 형성되는 밀도를 높게 구성하며, 상기한 도광판에서 오버랩부(7) 위치 앞에는 도트를 설치하지 않은 무도트부(31)를 형성하고, 그 무도트부(31) 좌우에는 도트의 밀집도를 높인 밀집도트부(33)를 형성한 것을 특징으로 하는 백라이트 유니트의 도광판A dot 22 having a non-uniform size is formed on the reflecting surface of the light guide plate, but the higher the distance from the light source, the higher the density is formed. In the light guide plate, a dot is not provided in front of the overlap part 7 position. 31), and a dense dot portion 33 having a high degree of dot density is formed on the left and right sides of the non-dotted portion 31, to form a light guide plate of the backlight unit. 제 1 항에 있어서,The method of claim 1, 상기한 도트(22)의 크기는 2-120㎛ 로 한 것을 특징으로 하는 백라이트 유니트의 도광판The light guide plate of the backlight unit, characterized in that the size of the dot 22 is set to 2-120 μm. 제 1 항에 있어서,The method of claim 1, 상기한 광원 전방에의 반사커버(8)에 의해 겹쳐지는 반사면의 오버랩부(7) 길이는 0.1-3.0mm 인 것을 특징으로 하는 백라이트 유니트의 도광판The length of the overlap portion 7 of the reflective surface overlapped by the reflective cover 8 in front of the light source is 0.1-3.0 mm. 삭제delete 제 1 항에 있어서,The method of claim 1, 상기한 출사면(11)의 프리즘산(111) 꼭대기 정점은 둥글게 형성시키며, 그 산 꼭대기의 곡률 반경은 0.01-0.05 mm 이며, 프리즘산(111)과 프리즘산(111) 사이에는 평면이 없는 형상인 것을 특징으로 하는 백라이트 유니트의 도광판The apex apex apex of the exit surface 11 is rounded, and the radius of curvature at the top of the peak is 0.01-0.05 mm, and there is no plane between the prism and the prism 111. Light guide plate of the backlight unit, characterized in that 제 1 항 내지 제 3 항 중 어느 한 항에 있어서,The method according to any one of claims 1 to 3, 상기한 도트(22)는 음각으로 형성하는 것을 특징으로 하는 백라이트 유니트의 도광판The light guide plate of the backlight unit, characterized in that the dot 22 is formed in an intaglio
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KR20010043054A (en) * 1998-04-30 2001-05-25 나카노 가츠히코 Light guide plate
JP2002022965A (en) 2000-07-07 2002-01-23 Ohtsu Tire & Rubber Co Ltd :The Light guide plate and back light
KR20020089188A (en) * 2001-05-22 2002-11-29 니치아 카가쿠 고교 가부시키가이샤 light plate in surfacial light emitting device
KR20050070628A (en) * 2003-12-30 2005-07-07 주식회사 에스엘 엘씨디 Light guide panel having the same size disperse pattern

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Publication number Priority date Publication date Assignee Title
KR20010043054A (en) * 1998-04-30 2001-05-25 나카노 가츠히코 Light guide plate
JP2002022965A (en) 2000-07-07 2002-01-23 Ohtsu Tire & Rubber Co Ltd :The Light guide plate and back light
KR20020089188A (en) * 2001-05-22 2002-11-29 니치아 카가쿠 고교 가부시키가이샤 light plate in surfacial light emitting device
KR20050070628A (en) * 2003-12-30 2005-07-07 주식회사 에스엘 엘씨디 Light guide panel having the same size disperse pattern

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