KR20020060325A - Light guide plate of back ligt and method of manufacturing the same - Google Patents
Light guide plate of back ligt and method of manufacturing the same Download PDFInfo
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- KR20020060325A KR20020060325A KR1020010001344A KR20010001344A KR20020060325A KR 20020060325 A KR20020060325 A KR 20020060325A KR 1020010001344 A KR1020010001344 A KR 1020010001344A KR 20010001344 A KR20010001344 A KR 20010001344A KR 20020060325 A KR20020060325 A KR 20020060325A
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- light guide
- guide plate
- light
- molded
- guide panel
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Classifications
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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
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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
- G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
- G02B6/0023—Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
- G02B6/0031—Reflecting element, sheet or layer
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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
- G02B6/0038—Linear indentations or grooves, e.g. arc-shaped grooves or meandering grooves, extending over the full length or width of the light guide
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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
Abstract
Description
본 발명은 면광원 장치에 관한 것으로, 더 상세하게는 면광원 장치의 도광판과 이 도광판의 제조방법에 관한 것이다.The present invention relates to a surface light source device, and more particularly, to a light guide plate of a surface light source device and a manufacturing method of the light guide plate.
통상적으로 액정표시소자등과 같은 수광소자의 광원, 조명간판등에 사용되는 면광원 장치는 공개 특허 공보 소60-216435호, 한국 특허 출원번호 제93-11174호, 제94-26117호, 제94-33115, 제94-26116호에 개시되어 있다.In general, surface light source devices used in light sources, lighting signs, and the like of light-receiving elements such as liquid crystal display devices are disclosed in Korean Patent Application Publication Nos. 60-216435, Korean Patent Application Nos. 93-11174, 94-26117, and 94-. 33115, 94-26116.
개시된 면광원 장치중 도광판을 이용한 면광원 장치는 도 1에 도시된 바와 같이 도광판(2)과 이 도광판(2)의 하면에 고정설치된 반사판(3)과, 상기 도광판(2)의 상면에 형성된 확산판(4)과, 상기 도광판(2)의 적어도 일측면에 고정설치된 발광수단(5)를 구비한다.The surface light source device using the light guide plate among the disclosed surface light source devices includes a light guide plate 2, a reflector 3 fixed to the bottom surface of the light guide plate 2, and a diffusion formed on the top surface of the light guide plate 2, as shown in FIG. 1. A plate 4 and light emitting means 5 fixed to at least one side of the light guide plate 2 are provided.
상기 면광원 장치에 있어서, 상기 도광판(2)은 투명한 아크릴 수지의 일면에 광을 산란 및 확산시키기 위한 기능을 가지는 비드(bead)형상의 TiO2와 글라스 또는 아크릴 등을 포함하는 잉크가 소정의 패턴으로 인쇄된 반사막(2a)이 형성된 구조를 가진다.In the surface light source device, the light guide plate 2 has a bead-shaped TiO 2 and ink containing glass or acrylic in a predetermined pattern having a function of scattering and diffusing light on one surface of a transparent acrylic resin. It has a structure in which the printed reflective film 2a is formed.
이러한 도광판(2)은 상기 반사막을 형성하기 위한 마스크의 제작, 인쇄공정, 건조공정등 공정수가 많아 생산성의 향상을 도모할 수 없으며, 반사막의 형성에 따른 양품율이 70% 수준으로 저조하다.The light guide plate 2 has a large number of processes such as manufacturing a mask for forming the reflective film, a printing process, and a drying process, and thus cannot improve productivity, and the yield of the reflective film is low at 70%.
한편, 도광판의 다른 예로서는 도광판의 하면에 브라스팅 에칭 타입(blasting etching type), 엔플러스 타입(enplus type), 옵티컬 인서션타입(OPI; optical instertion type), 더블 사이드 프리즘 타입, 홀로그램 패턴 타입등 다양하다. 그러나 이러한 타입은 아크릴의 도광판재에 소정의 패턴의 스트래치를 형성한 것이다..Meanwhile, other examples of the light guide plate may include a blasting etching type, an enplus type, an optical insertion type (OPI), a double side prism type, a hologram pattern type, and the like. Do. However, this type forms a predetermined pattern of stretch on the light guide plate of acrylic.
상기와 같이 도광판의 하면에 스크래치(scratch)를 형성하는 가공방법은 기계적인 가공법에 의해 이루어지므로 미세한 패턴의 형성이 어렵고, 균일한 광의 확산 및 산란이 이루어지지 않게된다. 즉, 도광판의 하면에 폭이 좁고 깊은 스크래치의 형성이 용이하지 않으므로 좁은 피치의 스크래치의 패턴이 불균일하고, 단위 가공시간이 길어져 생산성의 향상을 도모할 수 없다. 또한 도광판의 두께가 얇아지는 넓은 스크래치 간격으로 인하여 패턴이 보이는 경우가 발생하며,가공시 발생되는 칩(chip)들이 잔류하여 광의 확산효율이 떨어지게 된다.As described above, the processing method of forming a scratch on the lower surface of the light guide plate is made by a mechanical processing method, so that it is difficult to form a fine pattern, and uniform light diffusion and scattering are not achieved. That is, since the width | variety of a narrow and deep scratch is not easy to form in the lower surface of a light guide plate, the pattern of the scratch of a narrow pitch is nonuniform, and the unit processing time becomes long and productivity cannot be improved. In addition, a pattern may be seen due to a wide scratch interval in which the thickness of the light guide plate becomes thin, and chips generated during processing remain to reduce light diffusion efficiency.
본 발명은 상술한 바와 같은 문제점을 해결하기 위한 것으로, 도광판의 하면에 광의 산란 및 확산패턴의 형성에 따른 생산성을 향상시킬 수 있으며, 도광판의 전면에서 균일한 휘도로 광을 도광시킬 수 있는 면광원 장치의 도광판과 이의 제조방법을 제공함에 그 목적이 있다.The present invention is to solve the problems described above, it is possible to improve the productivity by the scattering of light and the formation of the diffusion pattern on the lower surface of the light guide plate, a surface light source capable of guiding light with uniform brightness in front of the light guide plate It is an object of the present invention to provide a light guide plate of a device and a method of manufacturing the same.
도 1은 종래 면광원 장치의 사시도,1 is a perspective view of a conventional surface light source device,
도 2는 본 발며에 따른 면광원 장치의 일부절제 사시도,2 is a partial ablation perspective view of the surface light source device according to the present invention,
도 3은 본 발명에 따른 면광원 장치의 다른 실시예를 도시한 단면도,3 is a cross-sectional view showing another embodiment of a surface light source device according to the present invention;
도 4는 본 발명에 따른 면광원장치의 제조방법을 나타내 보인 측면도,4 is a side view showing the manufacturing method of the surface light source device according to the present invention;
상기 목적을 달성하기 위하여 본 발명의 면광원 장치는,In order to achieve the above object, the surface light source device of the present invention,
도광판을 이루는 도광판재의 상면에 소정의 광의 산란 및 확산패턴이 형성된 성형판을 밀착시키는 제1단계와,A first step of closely contacting a molded plate on which a light scattering and diffusion pattern of predetermined light is formed on an upper surface of the light guide plate constituting the light guide plate;
상기 성형판에 초음파 발진자를 밀착시켜 상기 도광판재를 연화시키는 제2단계와,A second step of softening the light guide plate material by bringing an ultrasonic oscillator into close contact with the molded plate;
상기 성형판을 상기 연화된 도광판재에 가압하여 성형판의 광의 산란 및 확산패턴이 도광판재에 각인되도록 하는 제3단계와,A third step of pressing the molded plate onto the softened light guide plate material such that scattering and diffusion patterns of light of the molded plate are imprinted on the light guide plate material;
상기 도광판재로부터 성형판을 분리하는 제4단계를 포함하여 된 것을 그 특징으로 한다.And a fourth step of separating the molded plate from the light guide plate material.
상기와 같은 도광판의 제조방법의 제1단계에 있어서, 반사판을 이루는 반사시트 또는 광학부재를 개재시키는 단계를 더 포함하여 한다.In the first step of the method of manufacturing a light guide plate as described above, the method further includes interposing a reflective sheet or an optical member forming a reflective plate.
본 발명의 다른 특징의 면광원 장치용 도광판은 하면에 반사판 또는 광학 부재가 밀착된 상태로 성형된 광 산란 및 확산 패턴부를 구비한 도광판재를 포함하여 된 것을 그 특징으로 한다.A light guide plate for a surface light source device according to another aspect of the present invention is characterized by including a light guide plate having a light scattering and diffusion pattern portion molded in a state where a reflecting plate or an optical member is in close contact with a lower surface thereof.
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 면광원장치에 사용되는 도광판의 일 실시예를 도 2에 나타내 보였다.An embodiment of a light guide plate used in the surface light source device according to the present invention is shown in FIG. 2.
도시된 바와 같이 도광판(10)는 이를 이루는 도광판재(11) 하면에 가압성형된 성형된 광 산란 및 확산 패턴(12)이 형성되어 이루어진다. 상기 광 산란 및 광확산 패턴은 그 하면 또는 도광판재(11)의 측면으로부터 조사되는 광을 확산시키거나 산란시킬 수 있는 패턴이면 어느것이나 가능하다. 예컨데, 그 단면이 톱니형 또파형으로 이루어질 수 있으며 그 높이 또한 점차적으로 커지거나 작아질 수 있다.As illustrated, the light guide plate 10 is formed by forming a molded light scattering and diffusion pattern 12 that is press-molded on the bottom surface of the light guide plate 11. The light scattering and light diffusing patterns may be any patterns that can diffuse or scatter light irradiated from the lower surface or the side surface of the light guide plate 11. For example, the cross section may be serrated or wave shaped and its height may also gradually increase or decrease.
그리고 상기 도광판의 다른 실시예로서는 도 3에 도시된 바와 같이 도광판재(11)의 하면에 형성된 광 산란 및 확산패턴의 성형시 이와 일체로 형성된 반사시트(12) 또는 광학부재를 더 구비한다.As another embodiment of the light guide plate, as illustrated in FIG. 3, the light guide plate further includes a reflective sheet 12 or an optical member formed integrally with the light scattering and diffusion patterns formed on the bottom surface of the light guide plate material 11.
상술한 바와 같이 구성된 본 발명에 따른 명광원 장치의 도광판 제조방법은 다음과 같다.The light guide plate manufacturing method of the light source device according to the present invention configured as described above is as follows.
도 3에 도시된 바와 같이 도광판을 이루는 도광판재(21)의 상면에 소정의 광의 산란 및 확산패턴이 형성된 성형판(22)를 밀착시키는 제1단계를 수행하다. 여기에서 상기 성형판(22)는 가압시 충부한 구조적 강도를 자지는 금속판재로 이루어지며 그 하면에는 상기 광의 산란 및 확산패턴(22a)이 형성되는데, 이 패턴은 도광판재(21)에 형서된 상태에서 도광판재에 조사되는 광의 입사위치에 따라 광을 산란 및 확산시킬 수 있는 패턴이면 가능하다.As shown in FIG. 3, a first step of closely contacting the molding plate 22 having a predetermined light scattering and diffusion pattern is formed on the upper surface of the light guide plate 21 constituting the light guide plate. Here, the molded plate 22 is made of a metal plate material having a sufficient structural strength when pressed, and the scattering and diffusion pattern 22a of the light is formed on the lower surface, which is formed on the light guide plate 21 It is possible as long as the pattern can scatter and diffuse light according to the incident position of light irradiated to the light guide plate member in the state.
상기와 같이 성형판(22)와 도광판재(21)를 밀착시킨 상태에서 상기 금속판재의 상면에 초음파 발진자(23)을 밀착시켜 초음파를 발진시킴으로써 상기 도광판재(21)를 연화시키는 제2단계를 수행한다.As described above, the second step of softening the light guide plate material 21 by bringing the ultrasonic wave oscillator 23 into close contact with the upper surface of the metal plate material in the state in which the molded plate 22 and the light guide plate material 21 are in close contact with each other. Perform.
상기 제2단계에 의해 도광판재(21)가 연화되면 상기 성형판(22)를 가압하여 성형판의 하면에 형성된 패턴이 도광판재(21)에 각인되도록 하는 제3단계를 수행한다. 상기 제2,3단계를 동시에 수행하여도 무방하다. 즉, 초음파를 이용하여 도광판재(21)를 연화시킴과 동시에 성형판(22)를 가압할 수 있다. 상기와 같이 도광판재(21)에 광의 산란 및 확산패턴을 형성하는 과정에서 성형판(22)와 도광판재(21)의 사이에 반사시트(24)를 개재시켜 성형함으로써 도광판재(21)의 패턴성형 부위 표면에 밀착되도록 할 수 있다. 상기와 같이 형성이 완료되면 성형판(22)와 도광판재(21)를 분리하여 도광판재의 성형을 완료한다.When the light guide plate 21 is softened by the second step, a third step is performed in which the pattern formed on the bottom surface of the molded plate is imprinted on the light guide plate 21 by pressing the molded plate 22. The second and third steps may be performed simultaneously. That is, the light guide plate 21 may be softened using ultrasonic waves, and the molded plate 22 may be pressed. As described above, in the process of forming the light scattering and diffusing patterns on the light guide plate 21, the pattern of the light guide plate 21 is formed by forming the reflective sheet 24 between the molding plate 22 and the light guide plate 21. It may be in close contact with the surface of the molding site. When the formation is completed as described above, the molding plate 22 and the light guide plate member 21 are separated to complete molding of the light guide plate member.
상술한 바와 같이 구성된 면광원장치와 이의 제조방법에 따른 작용효과를 설명하면 다음과 같다.Referring to the surface light source device configured as described above and the operational effects of the manufacturing method thereof are as follows.
상술한 바와 같이 구성된 면광원 장치용 도광판은 성형판을 밀착시키고 초음파로 성형판재를 연화시킨 후 가압성형하게 되므로 그 공정이 매우 간단하여 종래와 같이 잉크나 용재등을 이용하여 형성하는 방식에 비하여 생산성의 향상을 도모할 수 있다. 특히 상술한 바와 같이 광의 산란 및 확산턴(21a)을 형성하는 것은 도광판에 잔류하는 첨가물이나 약품이 잔류하지 않기 때문에 광의 산란 및 확산특성이 좋다.The light guide plate for the surface light source device configured as described above is press-molded after closely contacting the molded plate, softening the molded plate member by ultrasonic wave, and thus the process is very simple, which is more productive than the conventional method of forming using ink or solvent. Can be improved. In particular, as described above, the light scattering and diffusing turns 21a have good light scattering and diffusing characteristics because no additives or chemicals remain in the light guide plate.
특히 도광판의 하면에 반사시트(24)가 일체로 형성된 경우에는 종래와 같이반사판을 별도로 실치할 필요가 없으며, 반사시트가 도광판과 밀착되어 있어 반사효율을 높일 수 있다.In particular, when the reflective sheet 24 is integrally formed on the lower surface of the light guide plate, there is no need to separately mount the reflective plate as in the prior art, and the reflective sheet is in close contact with the light guide plate to increase the reflection efficiency.
이상 설명된 바와 같이, 본 발명에 따른 면광원 장치의 도광판과 이의 제조방법은 종래와 같이 도광판의 하면에 잉크를 이용한 패턴의 형성에 따른 불량을 대폭 줄일 수 있고, 광의 산란 및 확산패턴의 정밀도를 높여 광의 산란 및 확산에 따란 광손실을 줄일 수 있다. 특히 본원 발명의 제조방법에 의해 도광판을 제조하는 경우 생산에 따른 수율을 종래 70%에서 90%로 높일 수 있다.As described above, the light guide plate of the surface light source device and the manufacturing method thereof according to the present invention can greatly reduce the defects caused by the formation of the pattern using the ink on the lower surface of the light guide plate as in the prior art, and the light scattering and the diffusion pattern precision It can increase the light loss due to scattering and diffusion of light. In particular, when manufacturing the light guide plate by the manufacturing method of the present invention can increase the yield according to the conventional 70% to 90%.
본 발명은 도면에 도시된 실시예를 들어 설명하였으나 이는 예시적인 것에 불과하며 본원 발명의 기술적 범위내에서 당업자에 의해 변형 가능함은 물론이다.Although the present invention has been described with reference to the embodiments illustrated in the drawings, this is merely exemplary and may be modified by those skilled in the art within the technical scope of the present invention.
예컨데, 초음파 발진기의 출력을 임으로 조정함으로써 미세피치를 가지는 프리즘과 요철을 갖는 정교환 광학기구의 제조에 적용이 가능하다.For example, by arbitrarily adjusting the output of an ultrasonic oscillator, it is applicable to manufacture of the prism which has a fine pitch, and the positive exchange optical apparatus which has an unevenness | corrugation.
Claims (3)
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020010001344A KR20020060325A (en) | 2001-01-10 | 2001-01-10 | Light guide plate of back ligt and method of manufacturing the same |
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| KR1020010001344A KR20020060325A (en) | 2001-01-10 | 2001-01-10 | Light guide plate of back ligt and method of manufacturing the same |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| KR20030037132A (en) * | 2001-11-02 | 2003-05-12 | 최은 | Manufacturing method of light guided panel |
| KR100665801B1 (en) * | 2004-10-28 | 2007-01-09 | 제일모직주식회사 | Multi-functional Light Guiding Plates and Method for Continuous Preparation of the Same |
| KR100692203B1 (en) * | 2003-01-23 | 2007-03-09 | 제일모직주식회사 | Light guide panel and method for fabricating thereof and back-light assembly using the same and liquid crystal display device using the same |
| KR100760234B1 (en) * | 2006-02-13 | 2007-09-20 | 제일모직주식회사 | Stamper for manufacturing light guide panel and manufacturing method of light guide panel using the same |
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| KR19990083239A (en) * | 1998-04-17 | 1999-11-25 | 히데끼 야마모또 | Light conductive plate, surface light source device, and reflection type liquid-crystal display |
| KR20000063320A (en) * | 2000-06-27 | 2000-11-06 | 박인협 | Manufacturing method light guide plate of back light unit |
| KR20020015865A (en) * | 2000-08-23 | 2002-03-02 | 양근창 | Apparatus and method for manufacturing light guide plate for plane light source unit |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR19990083239A (en) * | 1998-04-17 | 1999-11-25 | 히데끼 야마모또 | Light conductive plate, surface light source device, and reflection type liquid-crystal display |
| KR20000063320A (en) * | 2000-06-27 | 2000-11-06 | 박인협 | Manufacturing method light guide plate of back light unit |
| KR20020015865A (en) * | 2000-08-23 | 2002-03-02 | 양근창 | Apparatus and method for manufacturing light guide plate for plane light source unit |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030037132A (en) * | 2001-11-02 | 2003-05-12 | 최은 | Manufacturing method of light guided panel |
| KR100692203B1 (en) * | 2003-01-23 | 2007-03-09 | 제일모직주식회사 | Light guide panel and method for fabricating thereof and back-light assembly using the same and liquid crystal display device using the same |
| KR100665801B1 (en) * | 2004-10-28 | 2007-01-09 | 제일모직주식회사 | Multi-functional Light Guiding Plates and Method for Continuous Preparation of the Same |
| KR100760234B1 (en) * | 2006-02-13 | 2007-09-20 | 제일모직주식회사 | Stamper for manufacturing light guide panel and manufacturing method of light guide panel using the same |
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