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WO2003046648A1 - Moule a formage direct de surface (dsf) servant a la fabrication d'un guide de lumiere pour panneau lumineux - Google Patents

Moule a formage direct de surface (dsf) servant a la fabrication d'un guide de lumiere pour panneau lumineux Download PDF

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Publication number
WO2003046648A1
WO2003046648A1 PCT/KR2002/002226 KR0202226W WO03046648A1 WO 2003046648 A1 WO2003046648 A1 WO 2003046648A1 KR 0202226 W KR0202226 W KR 0202226W WO 03046648 A1 WO03046648 A1 WO 03046648A1
Authority
WO
WIPO (PCT)
Prior art keywords
mold
blade
molds
light guide
blade molds
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/KR2002/002226
Other languages
English (en)
Inventor
Kyunghwan Yoon
Chul Park
Seongjin Park
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
FINEOPTICS Co
Original Assignee
FINEOPTICS Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by FINEOPTICS Co filed Critical FINEOPTICS Co
Priority to AU2002365528A priority Critical patent/AU2002365528A1/en
Publication of WO2003046648A1 publication Critical patent/WO2003046648A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • G02B6/0035—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
    • G02B6/0048—Tapered light guide, e.g. wedge-shaped light guide with stepwise taper
    • 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
    • G02B6/0065—Manufacturing aspects; Material aspects
    • 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
    • G02B6/007—Incandescent lamp or gas discharge lamp
    • G02B6/0071—Incandescent lamp or gas discharge lamp with elongated shape, e.g. tube

Definitions

  • This invention relates to a direct s face-forming mold (hereinafter DSF) for manufacturing light guide plate used in backlight system for display system and its process.
  • DSF direct s face-forming mold
  • the light guide plate in backlight system includes transparent plate which accepts light rays emitted from the light source and disperse the Ught evenly on the surface of the display panel by changing the direction of the light rays.
  • Fig. 1 shows a light guide plate(2) made of acrylic resin and side- positioned light source(l).
  • the light source formed by COLD CATHODE FLUORESCENT LAMPS (hereinafter CCFL) is placed on a sides of light guide plate(2).
  • CCFL COLD CATHODE FLUORESCENT LAMPS
  • patterns(3) for light diffusion are formed to disperse the rays entered the plate.
  • the patterns(3) are printed on transparent light guide plate(2). Once the rays reach the pattern, it is scattered or refracted(hereinafter refracted) in the patterns and paths of the ray change to normal or similar direction to the surface of the plate. As a result, the ray exits the light guide plate and enter the LCD panel(not shown) positioned above for working as the back light.
  • the raw plate in this invention is referred to as plastic plate before formation of any structure for light diffusion such as the printed patterns and the light guide plate refers to the completed plate with the structure for light diffusion.
  • Fig. 2 shows some kind of rays with different incident angle into the plate are shown. Same numbers and symbols represent same or similar subjects as per Fig.l.
  • the patterns for light diffusion is made by screen printing method in general.
  • the method is simple as patterns are printed and glued to the raw plate. Also, it can be said to be productive and economical because large- area patterns can be easily printed on a large area raw plate which can be divided into smaller pieces.
  • the process is not limited by the area of the light guide plate and is compatible with for mass production. Problem arises when the patterns do not refract all rays but absorb some of rays.
  • the patterns are made of Ti ⁇ 2 and its refractive index does not coincide with the refractive index of materials for the raw plate. Additionally, it has strong characteristics for absorbing light rays as the pattern is made of ⁇ O 2 ceramic powder. Therefore, the light efficiency, changing the angle of incident ray and enabling the ray to be effective back light, will adversely decreases when the density of the patterns exceeds critical value. This is a trade-off problem of the screen-printing method.
  • Fig. 3 shows an embodiment of the light guide plate with the unevenness, for example, groove (7) on its surface.
  • Fig. 4 shows change in light paths (9) for the ray incident on the slant side of the groove (7), in detail.
  • the ray will change its light path due to the difference between refractive indexes of the plate and air, from the angle A to the angle B at the boundary surface.
  • Fig. 5 shows schematic diagram of producing the light guide plate by using the injection molding process. It is a prior method to producing the light guide plate with the grooves. When melted plastic material(17) such as acrylic plastic or resin is injected(18) into the cavity of mold(19) and cooled by the cooling channel (21), the groove (20) will be made on the surface of the plate.
  • plastic material(17) such as acrylic plastic or resin
  • Disadvantageous aspects of the injection molding method is that it takes a long time to produce light guide plate as it requires melting and cooling the raw material of the plate. Additionally, during the cooling process, thermal distortion may occur which harms the flatness of the plate surface and the function of the light guide plate.
  • Fig. 6 shows process of forming the grooves by pressing master stamp. This process will be called as "Direct Surface Fo ⁇ ning" or DSF, hereinafter.
  • the area close to the light source is brighter than the area apart from the source.
  • it requires repositioning of light diffusion means such as the groove.
  • the number or effect of the refracted ray will be smaller as close to the source.
  • increase in density or depth of grooves will cause more rays to be refracted. Therefore, the density of light ray refracted and exit from the plate will be even on the whole area of the plate as the density or depth of the grooves controlled as mentioned above.
  • Fig. 7 shows an example of a light guide plate (72) with light sources (71) on both sides. As it gets closer to the center, the depth of the groove becomes deepened. Such change of density of refraction patterns or grooves according to the distance from the light source is a critical factor for designing the light guide plate.
  • the master stamp is made into one piece so far. Therefore, if failure occurs when manufacturing at least one blade molds of the master stamp, whole piece of the master stamp should be discarded. This will increases cost of light guide plate production.
  • a primary object of this invention is to provide a new structure of DSF mold for backlight system, which will decrease the manufacturing cost.
  • the DSF mold in this invention is made by assembling multiple blade molds to function as a master stamp. The production cost of it will decrease because the mold will be modified easily when a failure occurs in manufacturing process, due to its assembling characteristics.
  • Another object of this invention is to provide a new structure of DSF mold which enable to produce various types of backlight unit without changing whole piece of master stamp.
  • a mold system for manufacturing light guide plate comprising: at least one base mold supporting multiple blade molds; a set of multiple blade molds disposed in parallel and supported by said base mold, wherein edge shape of each blade mold is sharp for forming grooves on a surface of light guide plate; at least one assembly hole formed on sides of each blade mold; at least one assembling means that penetrate said assembly hole in series of all blade molds; and fixture means for compressing both sides of said set of blade molds to secure positions of said blade molds, positioned at each end of said assembling means.
  • the longitudinal width of said assembly hole may be larger than diameter of said assembling means.
  • the mold system comprises at least one heating wire hole penetrating on said side of the blade mold to increase the temperature of the blade.
  • the assembling means are curved for adjusting height of each blade mold.
  • the mold system further comprises at least one height controlling means for controlling height of said set of blade molds or at least one heating wire that penetrates said heating wire hole for heating the edge of the said blade mold; and an electric supply means to supply electricity to said heating wire.
  • the mold system further comprises at least one cooling means for cooling the edge of the said blade mold, placed in said base mold or a flat board supporting said light guide plate when said set of multiple blade molds compresses the plate.
  • the mold system further comprises a height supporting means, positioned in between said base mold and said set of multiple blade molds, for supporting back ends of said blade molds to prevent displacement of said blade molds.
  • said assembling means may be bolt and said fixture means may be female screw on accordance with both ends of said bolt.
  • FIG. 1 shows a light guide plate with printed patterns on its surface according to prior art.
  • Fig. 2 shows schematic diagram showing various paths of ray in the plate with the printed patterns.
  • Fig. 3 shows schematic diagram showing various paths of ray in the plate with grooves on its surface.
  • Fig. 4 shows schematic diagram showing path of ray impinging on the groove.
  • Fig. 5 shows schematic diagram showing injection molding process.
  • Fig. 6 shows schematic diagram showing DSF process according to prior art.
  • Fig. 7 shows schematic diagram showing arrangement of grooves when the light sources are positioned on both sides of the plate.
  • Fig. 8 shows the DSF mold in this invention.
  • Fig. 9 shows an embodiment of side shape of blade mold in this invention.
  • Fig. 10 shows schematic diagram showing the process of assembling the blade molds
  • Fig. 11 shows an embodiment of curved assembling means used in this invention.
  • Fig. 12 shows an embodiment of the height supporting means used in this invention.
  • Fig. 13 shows front view of DSF mold in this invention.
  • Fig. 14 shows in-situ process when suppressing the surface of the plate by the DSF mold in this invention.
  • Fig. 15 shows an embodiment of the light guide plate manufactured by the
  • Fig.8 shows an embodiment of a new structure of the DSF mold in this invention.
  • the DSF mold of this invention comprises base molds (82, 82') supporting a set of multiple blade molds(83) assembled in parallel. It is different from prior arts for the facts that the mold is not made in one piece, but a set of single blades assembled together to form the DSF mold.
  • base molds (82,82') can clamp a set of blade molds (83) in one.
  • the set of blade molds can stamp grooves on a surface of a raw plate (85) placed on a flat board (84) by hfted down and suppressing sharp edges of the blade molds on the surface.
  • base molds (82, 82') comprise a pair of ' ⁇ V - shaped mold for clamping the set of blade molds (83) and means (87) for assembling the set of blade molds.
  • the means for assembling may be bolt or etc., passing through holes in the blade molds to fix or secure the blade molds in designed positions.
  • the shape of the base molds can be other than the 'T shape as long as it can perform same function of the clamping.
  • a base mold it is possible for a base mold to be a wall-shaped structure or one piece of structure, if it could support the assembled set of the blade molds.
  • a cooling channel (88) can be placed inside the base molds.
  • the blade molds for example, positioned in the center part protrude more than others for making light guide plate with light sources on both sides.
  • the depths or heights(height hereinafter) of the blade molds will change gradually or stepwise.
  • the DSF mold is freely adjustable in blade molds' height and width because it is assembly. This is further explained in the following Fig. 9 and Fig. 10 show shape of single blade mold and its assembling process, respectively. The shape is only for example and it is obvious to a skilled person in the area that various forms or shapes are possible.
  • the blade mold comprises assembly hole (91) for fixing on the base molds and heating wire hole (92) for heating wire. As shown in Fig. 9, the blade mold comprises assembly hole (91) for fixing on the base molds and heating wire hole (92) for heating wire. As shown in Fig. 9, the blade mold comprises assembly hole (91) for fixing on the base molds and heating wire hole (92) for heating wire. As shown in Fig. 9, the blade mold comprises assembly hole (91) for fixing on the base molds and heating wire hole (92) for heating wire. As shown in Fig.
  • bar-type assembling means e. g. bolt (110) penetrates through each assembly hole (91) in series and connect and fix the whole set of blade molds after fixed by fixture means, e. g. nuts or female screws (120) at one end or both ends of it.
  • the bolt may connect whole blade molds in a set and attach the set of blade molds to the base molds simultaneously with the fixture means.
  • the assembling bolt does not necessarily attach the whole set of blade molds to the base mold, but only assembles the blade molds in series.
  • Other means for attaching may be used to secure the set of blade molds on to the base molds.
  • horizontal compression force exerted inwardly by compressing both base molds can be used to secure the set of blade molds.
  • means for compressing the base molds for example, clamping bar positioned on external surfaces of both base molds may be used.
  • a skilled person in this area who understands this invention can easily tMnk of various means.
  • one end of it may be in form of rivet and the other end is male screw, alternatively.
  • more than one assembling bolt may be used for assembling blade molds.
  • the number, shape and positions of the heating wire holes (92) may be varied when necessary.
  • the shape of the assembly hole (91) may be an oval wherein its longitudinal width is greater than the diameter of the assembling means for adjusting height of each blade mold.
  • the DSF mold in this invention can be used in manufacturing various type of light guide plate mentioned above by adjusting the height of each blade mold.
  • the center part of the blade molds should protrude more than others.
  • the blade molds should protrude gradually as the distance from the light source becomes larger.
  • assembling bolt shall penetrate lower part or upper part of assembly hole to control heights of the blade molds.
  • the prior DSF mold can't be used for various type plate because it is only one piece mold and the height of the blades is not adjustable after completing the mold.
  • the assembly hole does not have to be an oval shape, as long as longitudinal width of the assembly hole is larger than the diameter of the assembling bolt for adjusting the height of the blade mold vertically.
  • its shape can be in a form of rectangle.
  • FIG. 11 shows an example case of such structure.
  • An assembling bolt (119) is curved so that end line shape of the blade molds is concave.
  • the diameter of the assembly hole corresponds to fit to the diameter of the assembling bolt.
  • Fig. 12 illustrates an embodiment of another method to adjust and support the height of blade molds.
  • a rigid height supporting means (118) is placed in between blade molds and base molds to support back ends of blade molds.
  • This rigid height supporting means is designed to have a gradient or steps. The role of the supporting means is to accurately support and fix delicate height difference of the blade molds. Also, this prevents recessions of the blade molds from intended height when the blade molds suppress the plate.
  • this rigid height supporting means can be used as means of height adjuster at the time of assembling and means for securing blade mold to base mold. For a skilled person in this area may use this height supporter means with the curved assembling bolt.
  • Lengths and widths of each blade molds depend on optical design of the plate, and its size varies from a few micrometers to a couple of hundred micrometers.
  • the blade mold is produced by various methods such as mechanical fo ⁇ ning or arc forming process.
  • the light guide plate is made of acrylic resin or plastics such as PMMA, and this material becomes softened when heated to the temperature of 50 ° C ⁇
  • the heating wire is used for increasing the temperature of the blade. Heating wire may be electric heating wire and it accompanies modules for electricity.
  • FIG. 13 a view of DSF mold assembled in direct surface forming equipment is shown.
  • the raw plate (85) is on flat board (84) and stamping mold (DSF) is directly fixed to the supporting body (112) by connecting means (111).
  • Stroke control means (113) is used for lifting up or down the DSF mold.
  • heating wire is connected to temperature controller (not shown in the figure) through the blade molds.
  • the temperature of the blade molds increases to 50 °C ⁇ 500 ° C by the heating wire and the raw plate will be pressed by the DSF mold to form the grooves.
  • the cooling channel (88) is built internally to the base molds and cooling water supplier means (not shown) may be connected.
  • vacuum holes may be formed on the flat board (84) which securely fixes the plate and prevents the thermal deformation by pulling down the plate by vacuum force.
  • Fig.14 snows the in-situ process of shaping the grooves (86) on the plate at the time of lowering the DSF mold. After grooves are formed, the surface of the plate should be solidified quickly so as not the grooves to be deformed when the mold is lifting up.
  • the cooling channel (88) in the base molds are used to cool the blade molds and the surface of the plate.
  • the light guide plate having grooves on its surface is produced as shown in Fig. 15. It is possible in this invention to adjust space between each blade mold in the DSF mold structure for controlling the density of the grooves. Simple examples of such embodiment are to modulate the thickness of each blade mold or place dummy spacers in between the blades when assembling.
  • the edge shape of the blade mold can be any form including plain edge.
  • triangle shape isosceles triangle shape or scalene triangle shape can be used.
  • continuous or discontinuous saw tooth shape can be used as the edge shape.
  • the forms or shapes are dependent on the optical design of the light guide plate.
  • DSF mold of this invention has following advantages; At first, it is an assembly of each blade molds manufactured individually.
  • waste is limited to that single blade mold only, not the whole body or piece of the DSF mold.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Nonlinear Science (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (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

Un premier aspect de cette invention porte sur une nouvelle structure de moule DSF pour panneau lumineux, obtenue par l'assemblage de plusieurs lames formant une matrice principale. Cet agencement permet de réduire les coûts de fabrication dans la mesure où il est facile de modifier le moule lorsque survient un problème en cours de fabrication, dû aux caractéristiques d'assemblage. Le moule selon l'invention, servant à fabriquer une plaque guide de lumière, est constitué d'au moins une base portant un jeu de plusieurs lames disposées en parallèle, le bout de chaque lame étant acéré afin de former des rainures à la surface de la plaque guide de lumière. Les côtés de chaque lame sont pourvus d'au moins un trou d'assemblage dans lequel pénètrent des dispositifs d'assemblage afin d'assembler en série toutes les lames. Chaque extrémité de ces dispositifs d'assemblage comporte des moyens de fixation comprimant les deux côtés du jeu de lames afin de les immobiliser.
PCT/KR2002/002226 2001-11-27 2002-11-27 Moule a formage direct de surface (dsf) servant a la fabrication d'un guide de lumiere pour panneau lumineux Ceased WO2003046648A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2002365528A AU2002365528A1 (en) 2001-11-27 2002-11-27 Dsf mold device for manufacturing lightguide in a backlight system

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2001-0074104 2001-11-27
KR1020010074104A KR20030043112A (ko) 2001-11-27 2001-11-27 백라이트용 도광판 제작을 위한 직접 표면 성형 금형 장치

Publications (1)

Publication Number Publication Date
WO2003046648A1 true WO2003046648A1 (fr) 2003-06-05

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KR (1) KR20030043112A (fr)
AU (1) AU2002365528A1 (fr)
WO (1) WO2003046648A1 (fr)

Cited By (5)

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Publication number Priority date Publication date Assignee Title
WO2006031545A1 (fr) * 2004-09-09 2006-03-23 Fusion Optix, Inc. Retroeclairage ameliore pour dispositifs d'affichage a cristaux liquides (lcd)
WO2009142339A1 (fr) * 2008-05-19 2009-11-26 Ls Tech Co., Ltd. Appareil pour réaliser un motif sur une plaque guide de lumière
JP2013134939A (ja) * 2011-12-27 2013-07-08 Fujikura Ltd 面発光用導光板の製造方法
EP3173690A1 (fr) * 2015-11-30 2017-05-31 Embedded Nano Europe AB Procédé et gabarit pour produire une partie de découplage de lumière sur une surface d'un guide de lumière
WO2017147066A1 (fr) * 2016-02-22 2017-08-31 Lumileds Llc Distribution d'intensité lumineuse asymétrique à partir d'un luminaire

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KR100581996B1 (ko) * 2004-06-24 2006-05-22 제이엠아이 주식회사 도광판 제조용 금형 및 그로부터 사출 성형된 도광판
KR100810039B1 (ko) * 2006-08-23 2008-03-07 (주) 민성정밀 도광판의 그루브 패턴 형성장치
KR100834189B1 (ko) * 2006-10-25 2008-05-30 김진섭 엘시디 전자커튼용 필름의 패턴형성장치

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KR20000063320A (ko) * 2000-06-27 2000-11-06 박인협 액정 표시 장치의 후면 발광체용 도광판 제조 방법
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JPH11231143A (ja) * 1998-02-12 1999-08-27 Casio Comput Co Ltd 導光板、及びその導光板製造用の型
KR20010007415A (ko) * 1999-06-17 2001-01-26 요코다 마코도 면광원장치, 액정표시장치 및 반사부재
JP2001060411A (ja) * 1999-08-23 2001-03-06 Enplas Corp 面光源装置，面光源装置を備えた画像表示装置及び面光源装置の反射部材
KR20000053796A (ko) * 2000-04-14 2000-09-05 최인식 도광판 성형용 금형
KR20000063320A (ko) * 2000-06-27 2000-11-06 박인협 액정 표시 장치의 후면 발광체용 도광판 제조 방법

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WO2006031545A1 (fr) * 2004-09-09 2006-03-23 Fusion Optix, Inc. Retroeclairage ameliore pour dispositifs d'affichage a cristaux liquides (lcd)
US7278775B2 (en) 2004-09-09 2007-10-09 Fusion Optix Inc. Enhanced LCD backlight
WO2009142339A1 (fr) * 2008-05-19 2009-11-26 Ls Tech Co., Ltd. Appareil pour réaliser un motif sur une plaque guide de lumière
JP2013134939A (ja) * 2011-12-27 2013-07-08 Fujikura Ltd 面発光用導光板の製造方法
EP3173690A1 (fr) * 2015-11-30 2017-05-31 Embedded Nano Europe AB Procédé et gabarit pour produire une partie de découplage de lumière sur une surface d'un guide de lumière
WO2017147066A1 (fr) * 2016-02-22 2017-08-31 Lumileds Llc Distribution d'intensité lumineuse asymétrique à partir d'un luminaire
US10416370B2 (en) 2016-02-22 2019-09-17 Lumileds Llc Asymmetrical light intensity distribution from luminaire
US10890709B2 (en) 2016-02-22 2021-01-12 Lumileds Llc Asymmetrical light intensity distribution from luminaire

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