KR20020066787A - Light Guide Panel in LCD device with a latticed V-grooved printless type pattern - Google Patents
Light Guide Panel in LCD device with a latticed V-grooved printless type pattern Download PDFInfo
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- KR20020066787A KR20020066787A KR1020010007145A KR20010007145A KR20020066787A KR 20020066787 A KR20020066787 A KR 20020066787A KR 1020010007145 A KR1020010007145 A KR 1020010007145A KR 20010007145 A KR20010007145 A KR 20010007145A KR 20020066787 A KR20020066787 A KR 20020066787A
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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
- G02B6/0025—Diffusing sheet or layer; Prismatic 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
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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)
- Light Guides In General And Applications Therefor (AREA)
- Planar Illumination Modules (AREA)
Abstract
본 발명은 LCD 평판 디스플레이 장치의 백라이트(backlight) 구조물 중 도광판에 관한 것으로, 본 발명의 도광판은 표면에 가로 및 세로로 일정한 간격을 가지고 연속적으로 V 문양의 홈을 새기되, 그 깊이가 조절되어 도광판 표면의 휘도를 균일하게 만들어 주는 것으로 상기 패턴설계에서 격자배열 패턴의 가로 및 세로방향으로 전개되는 선들의 간격이 500㎛ 에서 1500㎛ 이내에서 각기 일정간격으로 유지되고 V 홈의 내부각은 90°이상이 되고 그 골의 깊이가 12㎛ 에서 70㎛ 범위내에서 조정되는 것을 특징으로 하는 무인쇄타입의 도광판으로서, 이것은 V 커팅(cutting)에 의한 직가공이나 금형에 의한 사출성형만으로 제작이 가능하여 기존의 인쇄물 부착방식에 의한 생산의 번거로운 작업을 줄이고 저비용으로 도광판을 생산할 수 있는 효과가 있다.The present invention relates to a light guide plate of the backlight structure of the LCD flat panel display device, the light guide plate of the present invention is continuously engrave the grooves of the V pattern at regular intervals horizontally and vertically on the surface, the depth of the light guide plate is adjusted In order to make the surface uniformity, the interval between the horizontal and vertical lines of the lattice arrangement pattern in the pattern design is maintained at a constant interval within 500 μm to 1500 μm, and the internal angle of the V groove is greater than 90 °. And the depth of the bone is adjusted within the range of 12 ㎛ to 70 ㎛, which is a non-printing type light guide plate, which can be manufactured only by injection molding by direct processing by V cutting or by mold. It is possible to reduce the cumbersome work of production by the printing method of printing and to produce the light guide plate at low cost.
Description
LCD는 널리 알려진 평판 디스플레이 장치중의 하나이다. LCD에서 도광판은 측면에 부착된 형광램프(3)로부터 입사된 광선을 도광판의 표면을 통하여 외부로 고르게 출사시켜서 상부의 액정환경을 밝게 만들어 주는 백라이트(backlight) 역할을 한다[도 1]. 즉, 측면의 램프광원(3)을 면광원 형태로 전환시켜주는 역할을 하는 부품이다. 도광판(2)은 재질이 투명한 광학용 수지 특히, 아크릴이라 부르는 PMMA 수지를 사출성형(射出成形)하여 많이 사용되며, 표면에는 입사 임계각으로 인하여 내부에서 갇혀 흐르는 광선을 외부로 출사하기 위하여 그 표면에 빛의 산란 및 반사를 위한 여러 가지 패턴이 부착되거나 새겨진다. 기존의 인쇄형을 보면 도 5 및 도 6과 같이 판의 표면에 일정한 패턴의 산란용 인쇄물을 부착하였다. 이 인쇄타입 패턴은 사각형 또는 원형 모양의 배열이 일반적이고, 각각의 위치에서 빛의 출사량을 조절하기 위하여 인쇄물의 면적이 조절된다. 무인쇄타입 패턴의 경우 곡선 또는 직선[도 7]형태로 일정 깊이의 홈이 도광판의 표면에 새겨지는데, 일반적으로 단위 면적당 빛의 출사량을 조절하기 위하여 각각의 위치에서 곡선의 경우 곡률을, 직선의 경우 선 간격을 조절한다[도 7, 도 9]. 기존의 무인쇄타입 패턴의 경우 곡률이나 선들의 간격을 조절할 수 있는데, 이들 방법은 도광판 내의 국지(局地)적인 영역에서의 휘도보상이 어렵게 되어 있으며 전체적으로 조절할 수 있는 휘도보상배율도 대개 2배 내외가 되다.LCDs are one of the well known flat panel display devices. In the LCD, the LGP serves as a backlight to brighten the liquid crystal environment of the upper part by emitting light incident from the fluorescent lamp 3 attached to the side evenly through the surface of the LGP [Fig. 1]. That is, it is a part that serves to convert the lamp light source 3 of the side to the surface light source form. The light guide plate 2 is widely used by injection molding a transparent optical resin, in particular, a PMMA resin called acryl, and on the surface of the light guide plate 2 to emit light that is trapped in the interior due to the incident critical angle. Various patterns are attached or engraved for scattering and reflection of light. In the conventional printing type, a scattering print of a certain pattern is attached to the surface of the plate as shown in FIGS. 5 and 6. This print type pattern is generally arranged in a rectangular or circular shape, the area of the print is adjusted to control the amount of light output at each position. In the case of the non-print type pattern, a groove of a certain depth is engraved on the surface of the light guide plate in the form of a curve or a straight line [Fig. 7]. In general, the curvature of the curve at each position is a straight line to control the amount of light emitted per unit area. In the case of adjusting the line spacing (Fig. 7, Fig. 9). In the case of the conventional non-printing type pattern, the curvature or the spacing of the lines can be adjusted. These methods make it difficult to compensate for luminance in the local area of the light guide plate, and the luminance compensation factor that can be adjusted as a whole is about 2 times. become.
본 발명은 도광판의 패턴에 대한 것으로 조절변수에 의한 휘도 보상배율이 3 이상이 되어 경사형(wedge type) 도광판에서도 적용할 수 있도록 하고, 국지적인 휘도보상도 가능하여 도광판의 측벽이나 모서리등에서 중앙부위의 휘도와 균일하게 조절 할 수 있도록 하고, V 커팅(cutting)에 의한 직가공이나 금형에 의한 사출성형 무인쇄용 제작이 가능하도록 하는데 목적을 둔다.The present invention relates to the pattern of the light guide plate, so that the luminance compensation magnification by the control variable is 3 or more, so that it can be applied to a wedge type light guide plate, and local luminance compensation is also possible. Its purpose is to make it possible to control the brightness and uniformity of the product, and to make it possible to manufacture non-printing by direct cutting or mold by V cutting.
도 1은 도광판이 결합된 일반적인 LCD 백라이트 구조물에 대한 구조도1 is a structural diagram of a general LCD backlight structure combined with a light guide plate
도 2는 본 발명의 격자배열 패턴의 평면 개략도2 is a schematic plan view of the grid arrangement pattern of the present invention
도 3은 광선의 흐름이 포함된 도 3의 단면 A-A'의 단면 개략도3 is a schematic cross-sectional view of section A-A 'of FIG. 3 with the flow of light;
도 4는 도 3의 A 부분 상세도4 is a detailed view of portion A of FIG.
도 5는 인쇄패턴이 부착된 기존의 경사형 도광판에 대한 사시도5 is a perspective view of a conventional inclined light guide plate to which a printing pattern is attached
도 6은 도 5의 단면 A-A'의 단면 개략도FIG. 6 is a schematic cross-sectional view taken along the line A-A 'of FIG.
도 7은 기존의 무인쇄타입 패턴의 평면 개략도7 is a plan schematic view of a conventional non-printing type pattern
도 8은 광선의 흐름이 포함된 도 7의 단면 A-A' 의 단면 개략도8 is a schematic cross-sectional view of section A-A 'of FIG. 7 with the flow of light;
도 9는 도 8의 A 부분 상세도FIG. 9 is a detailed view of portion A of FIG. 8
도면의 주요 부분에 대한 부호 설명Explanation of symbols for the main parts of drawings
1 : 반사판(reflective sheet)1: Reflective sheet
2 : 도광판(light guide panel)2 light guide panel
3 : 램프(lamp) 광원3 lamp light source
4 : 램프 반사판(reflector)4: lamp reflector
5 : 확산시트(diffuser sheet)5: diffuser sheet
6, 7 : 프리즘시트(prism sheet)6, 7: prism sheet
8 : 광선(光線).8: light rays.
본 발명은 LCD 평판 디스플레이 장치의 백라이트(backlight) 구조물 중 도광판에 관한 것으로서, 도광판의 표면에 가로 및 세로로 연속적인 격자패턴의 홈을 새기되, 그 홈의 깊이는 도광판 표면 각 위치에서 요구되는 빛의 출사량에 비례하여 깊어지도록 된 것을 특징으로 하는 격자패턴 무인쇄 도광판에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light guide plate of a backlight structure of an LCD flat panel display device, wherein grooves of a horizontal and vertical continuous grid pattern are inscribed on the surface of the light guide plate, and the depth of the grooves is required at each position of the light guide plate surface. It relates to a grating pattern unprinted light guide plate characterized in that it is deepened in proportion to the amount of emitted.
이하에서 본 발명의 구체적인 실시방법을 도면을 이용하여 설명한다.Hereinafter, specific embodiments of the present invention will be described with reference to the drawings.
도 1은 일반적인 LCD용 백라이트의 결합요소를 보여주는데, 램프광원(3)은 한쪽에만 있는 경우도 있고 양쪽에 있는 경우 또는 그 이상으로 있는 경우도 있다. 여기서 도광판(2)은 측면의 램프광원(3)으로부터 입사된 빛을 도광판의 표면에서 고르게 출사시켜 면광원의 형태로 상면에 위치해 있는 액정유닛(LCD Units)을 밝게 해주는 역할을 한다. 도광판의 형태는 두께가 일정한 평판형(flat type)도 있고, 한쪽으로 경사진 경사형(wedge type)도 있다. 본 발명의 무인쇄용 패턴은 상기 형태의 도광판들에 있어서 표면에 도 2과 같이 가로 및 세로방향으로 일정한 간격을 유지하여 연속적인 V 문양의 홈이 전개된다. 이 V 문양의 홈은 기존의 인쇄물과 같이 도광판 내부에 갇혀 흐르는 빛을 산란 또는 굴절시켜 외부로 출사되도록 하는 역할을 한다[도 3, 도 4]. 도광판 전체 표면에 걸쳐서 각 격자지점에서 V 문양의 골 깊이는 다르게 조정되는데, 이는 도 3에서와 같이 램프광원(3)으로부터 멀리 떨어질수록 광선의 밀도가 약하게 되므로, 약해지는 만큼 V 홈의 깊이를 주어 빛이 산란되어 나가는 출사면적을 증가시켜 주기 위해서다. 실험결과에 의하면 V 홈의 깊이는 12㎛ 에서 70㎛ 범위내에서 조정되고 그 내부각은 90°이상으로 하는 것이 바람직하다. 따라서, 광선 밀도의 강약에 따라 출사면적이 홈의 깊이에 의하여 조정되는데, 상기의 범위에서 깊이가 조절될 경우 도광판내의 휘도 보상배율은 5배 이상에 이른다. 또한, 도광판내의 어느 영역에서나 홈의 깊이조절은 가능하므로 도광판의 측벽이나 모서리등의 국지적인 영역에서도 중앙부위와 독립적으로 휘도보상이 가능하게 된다. 도광판 표면에서 빛의 산란에 의해 발광되는 부위는 V 문양의 홈에서만 나타나게 되는데, LCD 백라이트 구조물에서 확산시트(5)는 패턴부위에서 출사되는 빛을 전체 면으로 확산시켜주는 역할을 하므로, 도 2의 격자배열 패턴에서 가로 및 세로 홈간의 선 간격은 확산시트가 충분히 효과를 발휘하도록 중심간 거리를 500㎛에서 1500㎛ 이내로 하는 것이 바람직하다. 본 발명의 V홈 형상은 음각으로 도광판에 나타나게 되며, 이의 가공은 엔드밀 공구에 의한 회전밀링도 가능하고, 바이트공구에 의한 스크래칭(scratching) 가공도 가능하다. 그 가공면은 무광택이 되도록하여 도광판내에 갇혀져 흐르는 빛이 산란되게 한다. 또한, 양각의 V산을 가진 코어금형을 제작하여 사출성형함으로써 음각의 도광판을 생산할 수도 있다.1 shows a coupling element of a typical LCD backlight, in which the lamp light source 3 may be present only on one side, or on both sides, or more. The light guide plate 2 serves to brighten the liquid crystal units (LCD Units) located on the upper surface in the form of a surface light source by emitting light incident from the lamp light source 3 on the side evenly from the surface of the light guide plate. The light guide plate may be of a flat type having a constant thickness, or a wedge type inclined to one side. In the non-printing pattern of the present invention, a continuous V-shaped groove is developed by maintaining a constant distance in the horizontal and vertical directions as shown in FIG. This V-shaped groove serves to scatter or refract light flowing trapped inside the light guide plate as in the conventional printed matter so as to be emitted to the outside [FIGS. 3 and 4]. The valley depth of the V pattern at each grating point is adjusted differently over the entire surface of the light guide plate. As the distance from the lamp light source 3 is farther away from the lamp light source 3, the density of the light beam becomes weaker. This is to increase the emission area where light is scattered. According to the experimental results, it is preferable that the depth of the V groove is adjusted within the range of 12 µm to 70 µm and the inner angle thereof is 90 ° or more. Therefore, the emission area is adjusted by the depth of the groove according to the intensity of the light beam density. When the depth is adjusted in the above range, the luminance compensation factor in the light guide plate is 5 times or more. In addition, since the depth of the groove can be adjusted in any region in the light guide plate, luminance compensation can be performed independently of the central portion even in a local area such as a side wall or a corner of the light guide plate. In the light guide plate surface, the light emitted by the scattering of the light appears only in the V-shaped grooves. In the LCD backlight structure, the diffusion sheet 5 plays a role of diffusing the light emitted from the pattern part to the entire surface. The line spacing between the horizontal and vertical grooves in the lattice arrangement pattern is preferably within 500 μm to 1500 μm between centers so that the diffusion sheet exhibits sufficient effects. The V-groove shape of the present invention is engraved on the light guide plate, and the machining of the V-groove may be performed by rotary milling by an end mill tool, or by scratching by a bite tool. The processed surface is matted so that the light trapped in the light guide plate is scattered. In addition, it is also possible to produce a negative light guide plate by manufacturing a core mold having an embossed V acid and injection molding.
본 발명은 무인쇄용 도광판의 패턴에 대한 것으로 조절변수에 의한 도광판 내의 휘도 보상배율이 5 이상이 되어 경사형 도광판에서도 적용이 가능하고, 도광판 내의 임의 부위에서도 국지적인 휘도보상이 가능하다. 또한, V 커팅(cutting)에 의한 직가공이나 금형에 의한 사출성형 제작이 가능하여 기존의 인쇄물 부착방식에 의한 생산의 번거로운 작업을 줄이고 저비용으로 도광판을 생산할 수 있는 효과가 있다.The present invention relates to a pattern of a non-printing light guide plate, and the luminance compensation factor in the light guide plate is 5 or more due to a control parameter, so that the present invention can be applied to an inclined light guide plate, and local luminance compensation can be performed at any part of the light guide plate. In addition, it is possible to manufacture the injection molding by the direct processing or the mold by V cutting (cutting) has the effect of reducing the cumbersome work of the production by the conventional printed matter attachment method and to produce the light guide plate at low cost.
Claims (4)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020010007145A KR20020066787A (en) | 2001-02-13 | 2001-02-13 | Light Guide Panel in LCD device with a latticed V-grooved printless type pattern |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020010007145A KR20020066787A (en) | 2001-02-13 | 2001-02-13 | Light Guide Panel in LCD device with a latticed V-grooved printless type pattern |
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| Publication Number | Publication Date |
|---|---|
| KR20020066787A true KR20020066787A (en) | 2002-08-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1020010007145A Ceased KR20020066787A (en) | 2001-02-13 | 2001-02-13 | Light Guide Panel in LCD device with a latticed V-grooved printless type pattern |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20040014890A (en) * | 2002-08-12 | 2004-02-18 | (주)나노디스플레이 | Brightness enhanced printless type Light Guide Panel with a extruded pattern in LCD backlight device |
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| JPH08313732A (en) * | 1995-05-15 | 1996-11-29 | Ohtsu Tire & Rubber Co Ltd :The | Light guide |
| JPH0915426A (en) * | 1995-06-26 | 1997-01-17 | Nippon Chemitec Kk | Light guiding plate and surface type lighting body using the light guiding plate |
| KR19990008855A (en) * | 1997-07-04 | 1999-02-05 | 최영진 | Back lighter of LCD module |
| JPH11174439A (en) * | 1997-12-11 | 1999-07-02 | Sanyo Electric Co Ltd | Light guide plate, surface light source and liquid crystal display device using it and manufacturing method of light guide plate |
| KR20010018403A (en) * | 1999-08-19 | 2001-03-05 | 구본준 | Backlight unit |
| KR20010063525A (en) * | 1999-12-22 | 2001-07-09 | 이구택 | Apparatus for detecting the edge of colded roll |
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2001
- 2001-02-13 KR KR1020010007145A patent/KR20020066787A/en not_active Ceased
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08313732A (en) * | 1995-05-15 | 1996-11-29 | Ohtsu Tire & Rubber Co Ltd :The | Light guide |
| JPH0915426A (en) * | 1995-06-26 | 1997-01-17 | Nippon Chemitec Kk | Light guiding plate and surface type lighting body using the light guiding plate |
| KR19990008855A (en) * | 1997-07-04 | 1999-02-05 | 최영진 | Back lighter of LCD module |
| JPH11174439A (en) * | 1997-12-11 | 1999-07-02 | Sanyo Electric Co Ltd | Light guide plate, surface light source and liquid crystal display device using it and manufacturing method of light guide plate |
| KR20010018403A (en) * | 1999-08-19 | 2001-03-05 | 구본준 | Backlight unit |
| KR20010063525A (en) * | 1999-12-22 | 2001-07-09 | 이구택 | Apparatus for detecting the edge of colded roll |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20040014890A (en) * | 2002-08-12 | 2004-02-18 | (주)나노디스플레이 | Brightness enhanced printless type Light Guide Panel with a extruded pattern in LCD backlight device |
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