JP2001256814A - Backlight device - Google Patents
Backlight deviceInfo
- Publication number
- JP2001256814A JP2001256814A JP2001016758A JP2001016758A JP2001256814A JP 2001256814 A JP2001256814 A JP 2001256814A JP 2001016758 A JP2001016758 A JP 2001016758A JP 2001016758 A JP2001016758 A JP 2001016758A JP 2001256814 A JP2001256814 A JP 2001256814A
- Authority
- JP
- Japan
- Prior art keywords
- light
- guide plate
- light guide
- backlight device
- light source
- 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.)
- Pending
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
- G02F1/1336—Illuminating devices
- G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
-
- 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
- G02B6/0028—Light guide, e.g. 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
- G02B6/0033—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
- G02B6/005—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
Landscapes
- 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)
- Liquid Crystal (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、バックライト装置
及び液晶表示装置に関し、より詳しくは液晶表示装置の
光源に用いられるバックライト装置及び液晶表示装置に
関するものである。The present invention relates to a backlight device and a liquid crystal display device, and more particularly, to a backlight device and a liquid crystal display device used as a light source of the liquid crystal display device.
【０００２】[0002]
【従来技術】平板ディスプレーに主に用いられる液晶表
示装置は自ら光を出すことができず、ただ光の透過率を
調節するものでバックライトのような光源が必要であ
る。バックライト装置は光源を液晶表示装置の底面に設
け基板全面を直接照光する直下方式と、基板の一側面又
は両側面に光源を設け導光板及び反射板等に光線を反
射、拡散するエッジ（edge）方式に分類され、現在は主
にエッジ方式のバックライト装置が用いられている。と
ころが、エッジ方式のバックライト装置が直下方式のバ
ックライト装置より輝度が落ちるため、これをある程度
補償するため二枚のプリズムシートを用いて光を集光す
る方法を用いる。2. Description of the Related Art A liquid crystal display device mainly used for a flat panel display cannot emit light by itself, but merely adjusts the transmittance of light and requires a light source such as a backlight. The backlight device has a light source provided on the bottom surface of the liquid crystal display device and directly illuminates the entire surface of the substrate, and a light source provided on one or both sides of the substrate to reflect and diffuse light rays to a light guide plate and a reflection plate. ), And currently edge-type backlight devices are mainly used. However, since the brightness of the edge type backlight device is lower than that of the direct type backlight device, a method of condensing light using two prism sheets is used to compensate for this to some extent.
【０００３】ここに、図１を参照して従来の技術による
バックライト装置に対し説明する。図１に示すように、
線光源の蛍光ランプ（１）と蛍光ランプ（１）の光を反
射させるランプ反射板（２）が、蛍光ランプ（１）から
の光を面光源に替えるための導光板（３）の一側面に配
置されており、導光板（３）の下部には光の漏洩を防ぐ
ための反射板（４）が配置されている。導光板（３）の
上部には光を均一に拡散させるための拡散板（５）があ
り、その上には散乱した光を集光させるためそれぞれ三
角錐の線形プリズム（８、９）を多数個有するプリズム
シート（prismsheet）（６、７）が設けられている。二
枚のプリズムシート（６、７）は線形プリズム（８、
９）が互いに垂直となるよう配置されており、各自他方
向の光を集光する。Here, a conventional backlight device will be described with reference to FIG. As shown in FIG.
A fluorescent lamp (1) as a linear light source and a lamp reflector (2) for reflecting light of the fluorescent lamp (1) are provided on one side of a light guide plate (3) for replacing light from the fluorescent lamp (1) with a surface light source. And a reflector (4) for preventing leakage of light is disposed below the light guide plate (3). Above the light guide plate (3), there is a diffusion plate (5) for uniformly diffusing the light, and a number of linear prisms (8, 9) each having a triangular pyramid are formed on the diffusion plate (5) to collect the scattered light. There are provided prism sheets (6, 7). The two prism sheets (6, 7) are linear prisms (8,
9) are arranged so as to be perpendicular to each other, and condense light in each direction.
【０００４】このようなバックライト装置は導光板
（３）の上に拡散板（５）と二枚のプリズムシート
（６、７）を形成するため生産過程が複雑で生産性が落
ちる。In such a backlight device, a diffusion plate (5) and two prism sheets (6, 7) are formed on a light guide plate (3), so that the production process is complicated and productivity is reduced.
【０００５】[0005]
【発明の目的】本発明の目的は、線光源の発光を有効に
利用して輝度を高めたバックライト装置及び液晶表示装
置を提供することである。本発明の他の目的は、生産性
の高いバックライト装置及び液晶表示装置を提供するこ
とである。SUMMARY OF THE INVENTION An object of the present invention is to provide a backlight device and a liquid crystal display device in which the luminance is enhanced by effectively utilizing the light emitted from a line light source. Another object of the present invention is to provide a backlight device and a liquid crystal display device with high productivity.
【０００６】[0006]
【課題を解決するための手段】本発明は、光を放出する
光源、前記光源からの光を側面から受けて第１方向に案
内し、上部面に錐状の凹部でなるプリズムパターンを多
数個有する導光板、及び前記導光板の下部に配置されて
おり、前記導光板からの前記第１方向と逆の第２方向の
光を、前記第１方向に再び反射させる反射板を含むバッ
クライト装置である。According to the present invention, there is provided a light source which emits light, receives light from the light source from a side surface and guides the light in a first direction, and a plurality of prism patterns each having a conical concave portion on an upper surface. A backlight device, comprising: a light guide plate having a light guide plate, and a reflector plate disposed below the light guide plate and reflecting light from the light guide plate in a second direction opposite to the first direction again in the first direction. It is.
【０００７】本発明はまた、光を放出する光源、前記光
源からの光を側面から受けて第１方向に案内し、上部面
に錐状の凹部でなるプリズムパターンを多数個有する導
光板、及び、前記導光板の下部に配置されており、前記
導光板からの前記第１方向と逆の第２方向の光を、前記
第１方向に再び反射させる反射板を含むバックライト装
置を備えた液晶表示装置である。The present invention also provides a light source that emits light, a light guide plate that receives light from the light source from the side surface, guides the light in a first direction, and has a large number of prism patterns each having a conical concave portion on an upper surface. A liquid crystal comprising a backlight device disposed below the light guide plate and including a reflector plate for reflecting light from the light guide plate in a second direction opposite to the first direction again in the first direction. A display device.
【０００８】本発明の実施形態は、以下のとおりであ
る。前記プリズムパターンは、互いに隣接していること
を特徴とする。前記プリズムパターンは、四角錐状に凹
んだ形をなすことを特徴とする。前記導光板の前記プリ
ズムパターン下部に拡散領域をさらに含むことを特徴と
する。前記光源を取り囲んでおり、前記光源の光を反射
させ開口部を介して導光板に集光させる光源反射板をさ
らに含むことを特徴とする。An embodiment of the present invention is as follows. The prism patterns are adjacent to each other. The prism pattern may be formed in a shape of a quadrangular pyramid. The light guide plate may further include a diffusion region below the prism pattern. A light source reflector surrounding the light source and reflecting the light of the light source and condensing the light on a light guide plate through an opening is further included.
【０００９】[0009]
【実施の形態】以下に、添付の図を参照して本発明の実
施例に係るバックライト装置に対し詳しく説明する。図
２は、本発明の実施例に係るバックライト装置の構造を
概略的に示す断面図である。図２に示すように、本発明
の実施例に係るバックライト装置には線光源に用いられ
るランプ（１１）と、ランプ（１１）を取り囲んでおり
一面に開口部を有するランプ反射板（１２）が開口部を
介し導光板（１３）の一側面に配置されている。ランプ
（１１）は消費電力が低いながら輝度の高い冷陰極線管
や熱陰極線管等の蛍光灯を用いることができ、導光板
（１３）の一側又は両側に配置することができる。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a backlight device according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. FIG. 2 is a cross-sectional view schematically illustrating a structure of a backlight device according to an embodiment of the present invention. As shown in FIG. 2, a backlight device according to an embodiment of the present invention includes a lamp (11) used as a line light source and a lamp reflector (12) surrounding the lamp (11) and having an opening on one surface. Are arranged on one side surface of the light guide plate (13) via the opening. As the lamp (11), a fluorescent lamp such as a cold cathode ray tube or a hot cathode ray tube having low power consumption and high luminance can be used, and can be arranged on one side or both sides of the light guide plate (13).
【００１０】ランプ反射板（１２）は、ランプ（１１）
から出る光を反射させ開口部を介してのみ光が放出でき
るようにして集光し、開口部以外の部分で光の漏洩を防
ぐ。導光板（１３）はランプ（１１）から出た光を面光
源に取り替え、図２で導光板（１３）の上側である第１
方向に誘導する機能を有し、導光板（１３）の下部面は
傾斜してなりランプ反射板（１２）と隣接する所から離
れるほど薄い厚さを有することもでき、均一な厚さを有
することもできる。The lamp reflector (12) comprises a lamp (11).
The light emitted from the light source is reflected so that light can be emitted only through the opening, and the light is condensed to prevent leakage of light in portions other than the opening. The light guide plate (13) replaces the light emitted from the lamp (11) with a surface light source, and the light guide plate (13) in FIG.
The lower surface of the light guide plate (13) is inclined so that the light guide plate (13) may have a smaller thickness as being away from the portion adjacent to the lamp reflector (12) and have a uniform thickness. You can also.
【００１１】導光板（１３）は透明なアクリル樹脂で作
ったものを利用し、導光板（１３）の下部面には光を散
乱させて均一な面光源を作るため凹凸や蝕刻、又は印刷
を介して作られた散乱パターン（未図示）が形成されて
いる。一方、導光板（１３）の下部には第１方向と逆方
向の第２方向に放出される光を反射させ、光が漏洩しな
いようにする反射板（１４）が配置されている。導光板
（１３）の上部面には、導光板（１３）を通過した光を
第１方向に集光するための四角錐状の凹部でなるプリズ
ムパターン（１３０）が多数個形成されており、図を参
照して具体的に説明することにする。The light guide plate (13) is made of a transparent acrylic resin, and the lower surface of the light guide plate (13) is provided with irregularities, etching, or printing to scatter light to form a uniform surface light source. A scattering pattern (not shown) formed through the intermediary is formed. On the other hand, a reflection plate (14) is disposed below the light guide plate (13) to reflect light emitted in a second direction opposite to the first direction and prevent the light from leaking. On the upper surface of the light guide plate (13), a large number of prism patterns (130) formed of quadrangular pyramid-shaped recesses for condensing light passing through the light guide plate (13) in a first direction are formed. This will be specifically described with reference to the drawings.
【００１２】図３は本発明の実施例に係る導光板の平面
図であり、図４は図３でＡ−Ｂ線に沿い切断して示した
断面図であり、図５は図３で四角錐状の凹部でなるプリ
ズムパターンに対する斜視図である。図３及び図４に示
すように導光板（１３）の上部面は、図５に示すような
四角錐状に凹み三角状の四面でなる凹部の形のプリズム
パターン（１３０）を有する。したがって、上から見る
とき、四つの三角形に作られた四角錐を基本単位に多数
個が隣接している形になされるが、四角錐の中央部分
（１３４）は一番低い所であり、四角錐の各辺（１３
５）が一番高い所となる。ここで、プリズムパターン
（１３０）の第１面（１３２）はｘ軸方向に入ってきた
光を屈折させｚ軸方向に集光し、第２面（１３３）はｙ
軸方向に入ってきた光をｚ軸方向に集光する。ｚ軸はｘ
軸及びｙ軸に対し全て垂直であり、図３を垂直に通過す
る軸を言う。FIG. 3 is a plan view of a light guide plate according to an embodiment of the present invention, FIG. 4 is a sectional view taken along line AB in FIG. 3, and FIG. It is a perspective view with respect to the prism pattern which consists of a pyramid-shaped recessed part. As shown in FIG. 3 and FIG. 4, the upper surface of the light guide plate (13) has a prism pattern (130) in the form of a concave portion formed of four surfaces of a triangular shape as shown in FIG. Therefore, when viewed from above, a large number of squares are formed adjacent to each other with the square pyramid formed into four triangles as a basic unit, but the central part (134) of the square pyramid is the lowest point, Each side of the pyramid (13
5) is the highest point. Here, the first surface (132) of the prism pattern (130) refracts light that has entered the x-axis direction and condenses it in the z-axis direction, and the second surface (133) is y.
Light that has entered the axial direction is collected in the z-axis direction. The z axis is x
The axis is perpendicular to the axis and the y-axis and passes vertically through FIG.
【００１３】このようなバックライト装置でランプ（１
１）から出た光は、ランプ反射板（１２）で反射した光
とともに導光板（１３）に誘導されて入り、一部は導光
板（１３）下部面に形成されている散乱パターンにより
散乱し第１方向の面光源に均一に分布され、一部導光板
（１３）の下部面を通過した第２方向の光は、導光板
（１３）下部に配置されている反射板（１４）により再
び反射し導光板（１３）に入射される。したがって、第
１方向を有する光が導光板（１３）全体に分布し、横方
向及び縦方向に散乱した光はプリズムパターン（１３
０）を通過しながら基板に対し垂直の方向に集光され、
その上部に設けられるパネル側に入射される。In such a backlight device, the lamp (1)
The light emitted from 1) is guided into the light guide plate (13) together with the light reflected by the lamp reflector (12), and a part of the light is scattered by the scattering pattern formed on the lower surface of the light guide plate (13). Light in the second direction, which is uniformly distributed to the surface light source in the first direction and partially passes through the lower surface of the light guide plate (13), is again reflected by the reflector (14) disposed below the light guide plate (13). The light is reflected and incident on the light guide plate (13). Therefore, the light having the first direction is distributed throughout the light guide plate (13), and the light scattered in the horizontal and vertical directions is distributed in the prism pattern (13).
0), while being focused in a direction perpendicular to the substrate while passing through
The light is incident on the panel provided on the upper side.
【００１４】一方、図６に示すように本発明の他の実施
例では、導光板（１３）のプリズムパターン（１３０）
下部に拡散機能を有する粒子が分散されている拡散領域
（１３７）を形成することにより、光が面光としてより
均一に拡散されるようにすることもできる。On the other hand, as shown in FIG. 6, in another embodiment of the present invention, the prism pattern (130) of the light guide plate (13) is used.
By forming a diffusion region (137) in which particles having a diffusion function are dispersed at the bottom, light can be more uniformly diffused as surface light.
【００１５】[0015]
【発明の効果】本発明の液晶表示装置及び液晶表示装置
の光源に用いられるバックライト装置によれば、導光板
が行錐状の凹部でなるプリズムパターンを多数個有して
おり、均一でありながらも高い輝度を得ることができる
効果を有する。さらに、本発明によるこのようなプリズ
ムパターンを導光板の上部面に形成することは、製造工
程が簡単となり生産性を高めることができ、さらにバッ
クライト装置の厚さを薄くすることができる効果を有す
る。According to the liquid crystal display device and the backlight device used as the light source of the liquid crystal display device of the present invention, the light guide plate has a large number of prism patterns each having a row-cone-shaped concave portion and is uniform. However, it has the effect that high luminance can be obtained. Furthermore, forming such a prism pattern on the upper surface of the light guide plate according to the present invention has the effect of simplifying the manufacturing process, increasing productivity, and further reducing the thickness of the backlight device. Have.
【図１】図１は、従来技術に係るバックライト装置の構
造を概略的に示した構成図である。FIG. 1 is a configuration diagram schematically showing a structure of a backlight device according to the related art.
【図２】図２は、本発明の実施例に係るバックライト装
置の構造を概略的に示した断面図である。FIG. 2 is a cross-sectional view schematically illustrating a structure of a backlight device according to an embodiment of the present invention.
【図３】図３は、本発明の実施例に係る導光板の平面図
である。FIG. 3 is a plan view of a light guide plate according to an embodiment of the present invention.
【図４】図４は、図３でＡ−Ｂ線に沿って切断して示す
断面図であり、FIG. 4 is a sectional view taken along line AB in FIG. 3;
【図５】図５は、図３で四角錐状の凹部でなるプリズム
パターンに対する斜視図である。FIG. 5 is a perspective view of a prism pattern having a quadrangular pyramid-shaped recess in FIG. 3;
【図６】図６は、本発明の他の実施例に係るバックライ
ト装置の構造を概略的に示す断面図である。FIG. 6 is a cross-sectional view schematically showing a structure of a backlight device according to another embodiment of the present invention.
１１ ランプ １２ ランプ反射板 １３ 導光板 １４ 反射板 １３０ プリズムパターン １３２ 第１面 １３３ 第２面 １３４ 四角錐の中央部分 DESCRIPTION OF SYMBOLS 11 Lamp 12 Lamp reflector 13 Light guide plate 14 Reflector 130 Prism pattern 132 1st surface 133 2nd surface 134 Central part of quadrangular pyramid
Claims (6)
上部面に錐状の凹部でなるプリズムパターンを多数個有
する導光板、及び前記導光板の下部に配置されており、
前記導光板からの前記第１方向と逆の第２方向の光を、
前記第１方向に再び反射させる反射板を含むバックライ
ト装置。A light source that emits light, receives light from the light source from a side surface, guides the light in a first direction,
A light guide plate having a large number of prism patterns formed of conical concave portions on an upper surface, and disposed below the light guide plate,
Light in the second direction opposite to the first direction from the light guide plate,
A backlight device including a reflector that reflects light in the first direction again.
ていることを特徴とする請求項１記載のバックライト装
置。2. The backlight device according to claim 1, wherein the prism patterns are adjacent to each other.
んだ形をなすことを特徴とする請求項２記載のバックラ
イト装置。3. The backlight device according to claim 2, wherein the prism pattern has a quadrangular pyramid shape.
に拡散領域をさらに含むことを特徴とする請求項１記載
のバックライト装置。4. The backlight device according to claim 1, further comprising a diffusion region below the prism pattern of the light guide plate.
光を反射させ開口部を介して導光板に集光させる光源反
射板をさらに含むことを特徴とする請求項１記載のバッ
クライト装置。5. The backlight device according to claim 1, further comprising a light source reflector surrounding the light source and reflecting light from the light source and condensing the light on a light guide plate through an opening.
側面から受けて第１方向に案内し、上部面に錐状の凹部
でなるプリズムパターンを多数個有する導光板、及び、
前記導光板の下部に配置されており、前記導光板からの
前記第１方向と逆の第２方向の光を、前記第１方向に再
び反射させる反射板を含むバックライト装置を備えた液
晶表示装置。6. A light source that emits light, a light guide plate that receives light from the light source from a side surface, guides the light in a first direction, and has a plurality of prism patterns formed of conical concave portions on an upper surface, and
A liquid crystal display comprising a backlight device disposed below the light guide plate and including a reflector plate for reflecting light from the light guide plate in a second direction opposite to the first direction again in the first direction. apparatus.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2000-3463 | 2000-01-25 | ||
| KR1020000003463A KR20000024140A (en) | 2000-01-25 | 2000-01-25 | a back light unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2001256814A true JP2001256814A (en) | 2001-09-21 |
Family
ID=19641266
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001016758A Pending JP2001256814A (en) | 2000-01-25 | 2001-01-25 | Backlight device |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP2001256814A (en) |
| KR (1) | KR20000024140A (en) |
| TW (1) | TW525028B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100828520B1 (en) * | 2001-11-23 | 2008-05-13 | 삼성전자주식회사 | Liquid crystal display module |
| KR100620575B1 (en) * | 2004-03-22 | 2006-09-12 | 주식회사 두산 | light guide with prism pattern of concave pentagonal structure |
| KR100776714B1 (en) * | 2004-11-12 | 2007-11-19 | 주식회사 두산 | Light guide plate for back-light with prism interface and the manufacturing method thereof |
| KR100793537B1 (en) * | 2006-07-04 | 2008-01-14 | 삼성에스디아이 주식회사 | A light guided panel and backlight unit having the same |
| JP4307477B2 (en) | 2006-07-04 | 2009-08-05 | 三星モバイルディスプレイ株式會社 | Light guide plate and backlight unit |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0534140B1 (en) * | 1991-08-22 | 1997-07-16 | Tosoh Corporation | Backlighting device |
| JPH06208113A (en) * | 1993-01-12 | 1994-07-26 | Asahi Chem Ind Co Ltd | Surface lighting device |
| JPH07151924A (en) * | 1993-11-30 | 1995-06-16 | Meitaku Syst:Kk | Surface light source device |
-
2000
- 2000-01-25 KR KR1020000003463A patent/KR20000024140A/en not_active Application Discontinuation
-
2001
- 2001-01-19 TW TW090101321A patent/TW525028B/en not_active IP Right Cessation
- 2001-01-25 JP JP2001016758A patent/JP2001256814A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| TW525028B (en) | 2003-03-21 |
| KR20000024140A (en) | 2000-05-06 |
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