CN100454098C

Movatterモバイル変換

Info

Publication number: CN100454098C
Application number: CNB2005100334732A
Authority: CN
Inventors: 林精皇; 张志弘; 吕嵩; 林文斌
Original assignee: Innolux Shenzhen Co Ltd; Innolux Display Corp
Current assignee: Innolux Shenzhen Co Ltd; Innolux Corp
Priority date: 2005-03-05
Filing date: 2005-03-05
Publication date: 2009-01-21
Anticipated expiration: 2025-03-05
Also published as: CN1828385A

Abstract

The present invention relates to a light guide plate which comprises a light incident surface, a light exit surface adjacent to the light incident surface and a bottom surface opposite to the light exit surface. A plurality of through holes are arranged in the light guide plate, and at least one end of each through hole penetrates through the bottom surface or the light exit surface. The light guide plate has high light utilization ratio and can be used for backlight modules of liquid crystal display devices.

Description

Translated fromChinese

导光板light guide plate

【技术领域】【Technical field】

本发明是关于一种导光板。The invention relates to a light guide plate.

【背景技术】【Background technique】

由于液晶显示器面板中的液晶本身不具备发光特性，因而，为达到显示效果，须给液晶显示器面板提供一面光源装置，如背光模组，其功能在于向液晶显示器面板供应亮度充分且分布均匀的面光源。Since the liquid crystal in the LCD panel itself does not have light-emitting characteristics, in order to achieve the display effect, it is necessary to provide the LCD panel with a light source device, such as a backlight module, whose function is to supply the LCD panel with a surface with sufficient brightness and uniform distribution. light source.

现有技术背光模组由光源、反射板、导光板、扩散板及棱镜层等构成，其中导光板是背光模组中的关键组件，其作用在于引导入射光经导光板散射及反射而转换成面光源。The prior art backlight module is composed of a light source, a reflector, a light guide plate, a diffusion plate, and a prism layer. The light guide plate is a key component in the backlight module, and its function is to guide the incident light to be scattered and reflected by the light guide plate and converted into surface light source.

请参看图1，是一种现有的背光模组的示意图。该背光模组200包括一光源210，一导光板220，一反射板230及一扩散板240。该导光板220包括一入光面222，一与该入光面相邻的出光面223，及一与该出光面223相对的底面224。该光源210邻近该入光面222设置，该反射板230邻近该底面224设置，该扩散板240邻近该出光面223设置。该底面224上设置有均匀分布的多个圆形扩散点226。该扩散点226可有效反射及扩散射至其上的光线，从而提高该导光板220和该背光模组200的光利用率与出光均匀度。Please refer to FIG. 1 , which is a schematic diagram of a conventional backlight module. Thebacklight module 200 includes alight source 210 , alight guide plate 220 , areflection plate 230 and adiffusion plate 240 . Thelight guide plate 220 includes alight incident surface 222 , alight exit surface 223 adjacent to the light incident surface, and abottom surface 224 opposite to thelight exit surface 223 . Thelight source 210 is disposed adjacent to thelight incident surface 222 , thereflector 230 is disposed adjacent to thebottom surface 224 , and thediffuser 240 is disposed adjacent to thelight exit surface 223 . A plurality ofcircular diffusion points 226 are evenly distributed on thebottom surface 224 . Thediffusion point 226 can effectively reflect and diffuse the light incident on it, so as to improve the light utilization rate and light uniformity of thelight guide plate 220 and thebacklight module 200 .

但是，该光源210发出的光线自入光面222进入导光板220后，部分光线需在导光板220中间穿过，光程较长，且需经过多次反射，会造成光损失，从而导致该导光板220的光利用率降低。However, after the light emitted by thelight source 210 enters thelight guide plate 220 from thelight incident surface 222, part of the light needs to pass through the middle of thelight guide plate 220, the optical path is long, and it needs to undergo multiple reflections, which will cause light loss, resulting in this The light utilization efficiency of thelight guide plate 220 decreases.

【发明内容】【Content of invention】

为解决现有技术导光板光利用率较低的问题，提供一种具有较高光利用率的导光板实为必要。In order to solve the problem of the low light utilization rate of the light guide plate in the prior art, it is necessary to provide a light guide plate with a higher light utilization rate.

解决该技术问题的一种技术方案是：提供一种导光板，其包括一入光面，一与该入光面相邻的出光面，及一与该出光面相对的底面。该导光板内部具有多个通孔，每一通孔至少有一端贯穿底面或出光面，该多个通孔呈开口背向入光面的折线形，该多个通孔的形状是金字塔形或圆台形。A technical solution to solve this technical problem is to provide a light guide plate, which includes a light incident surface, a light exit surface adjacent to the light incident surface, and a bottom surface opposite to the light exit surface. There are a plurality of through holes inside the light guide plate, each through hole has at least one end running through the bottom surface or the light-emitting surface, and the plurality of through-holes are in the shape of a broken line with the opening facing away from the light-incident surface, and the shape of the plurality of through-holes is pyramidal or circular. Table shape.

解决该技术问题的另一种技术方案是：提供一种导光板，其包括一入光面，一与该入光面相邻的出光面，及一与该出光面相对的底面。该导光板内部具有多个通孔，每一通孔至少有一端贯穿底面或出光面，该多个通孔呈开口背向入光面的折线形，该导光板的材质为聚甲基丙烯酸甲酯或聚碳酸酯。Another technical solution to solve this technical problem is to provide a light guide plate, which includes a light incident surface, a light exit surface adjacent to the light incident surface, and a bottom surface opposite to the light exit surface. The light guide plate has a plurality of through holes inside, and at least one end of each through hole runs through the bottom surface or the light-emitting surface. The plurality of through holes are in the shape of a broken line with the opening facing away from the light-incident surface. The material of the light guide plate is polymethyl methacrylate. or polycarbonate.

解决该技术问题的第三种技术方案是：提供一种导光板，其包括一入光面，一与该入光面相邻的出光面，及一与该出光面相对的底面。该导光板内部具有多个通孔，每一通孔至少有一端贯穿底面或出光面，该多个通孔呈开口背向入光面的折线形，该多个通孔是等径的圆形通孔，且基本平行等距设置。The third technical solution to solve this technical problem is to provide a light guide plate, which includes a light incident surface, a light exit surface adjacent to the light incident surface, and a bottom surface opposite to the light exit surface. There are a plurality of through holes inside the light guide plate, and at least one end of each through hole runs through the bottom surface or the light-emitting surface. holes, and are basically parallel and equidistant.

解决该技术问题的第四种技术方案是：提供一种导光板，其包括一入光面，一与该入光面相邻的出光面，及一与该出光面相对的底面。该导光板内部具有多个通孔，每一通孔至少有一端贯穿底面或出光面，该多个通孔呈开口背向入光面的折线形，该出光面为雾化表面。The fourth technical solution to solve this technical problem is to provide a light guide plate, which includes a light incident surface, a light exit surface adjacent to the light incident surface, and a bottom surface opposite to the light exit surface. The light guide plate has a plurality of through holes inside, and at least one end of each through hole runs through the bottom surface or the light-emitting surface.

解决该技术问题的第五种技术方案是：提供一种导光板，其包括一入光面，一与该入光面相邻的出光面，及一与该出光面相对的底面。该导光板内部具有多个通孔，每一通孔至少有一端贯穿底面或出光面，该多个通孔呈开口背向入光面的折线形，该底面上设置有多个扩散点。The fifth technical solution to solve this technical problem is to provide a light guide plate, which includes a light incident surface, a light exit surface adjacent to the light incident surface, and a bottom surface opposite to the light exit surface. The light guide plate has a plurality of through holes inside, and at least one end of each through hole runs through the bottom surface or the light-emitting surface.

解决该技术问题的第六种技术方案是：提供一种导光板，其包括一入光面，一与该入光面相邻的出光面，及一与该出光面相对的底面，其特征在于：该导光板内部具有多个通孔，每一通孔至少有一端贯穿底面或出光面，该导光板的多个通孔互相交叉，交叉的通孔位于垂直于入光面的平面上。The sixth technical solution to solve this technical problem is to provide a light guide plate, which includes a light incident surface, a light exit surface adjacent to the light incident surface, and a bottom surface opposite to the light exit surface, characterized in that The light guide plate has a plurality of through holes inside, and at least one end of each through hole penetrates the bottom surface or the light-emitting surface, and the plurality of through-holes of the light guide plate intersect with each other, and the intersecting through-holes are located on a plane perpendicular to the light-incident surface.

解决该技术问题的第七种技术方案是：一种导光板，其包括一入光面，一与该入光面相邻的出光面，及一与该出光面相对的底面，其特征在于：该导光板内部具有多个通孔，每一通孔至少有一端贯穿底面或出光面，该导光板的多个通孔位于不同的垂直于入光面的平面上，其正投影互相交叉。The seventh technical solution to solve this technical problem is: a light guide plate, which includes a light incident surface, a light exit surface adjacent to the light incident surface, and a bottom surface opposite to the light exit surface, characterized in that: There are a plurality of through holes inside the light guide plate, and at least one end of each through hole penetrates the bottom surface or the light exit surface. The plurality of through holes of the light guide plate are located on different planes perpendicular to the light incident surface, and their orthographic projections intersect each other.

该技术方案的导光板包含有多个通孔，该多个通孔在该导光板内部形成多个曲面，可以为入射光线提供多个反射及折射面。光源发出的光线进入导光板后，光线可被该多个曲面反射及折射向出光面，可避免光程太长及多次反射造成的光损失，从而可提高导光板的光利用率。导光板内部设置多个通孔，还可以减轻导光板的重量，更加符合导光组件越来越轻量化的发展趋势。The light guide plate of this technical solution includes a plurality of through holes, and the plurality of through holes form a plurality of curved surfaces inside the light guide plate, which can provide multiple reflection and refraction surfaces for incident light. After the light emitted by the light source enters the light guide plate, the light can be reflected by the plurality of curved surfaces and refracted toward the light emitting surface, which can avoid light loss caused by too long optical path and multiple reflections, thereby improving the light utilization rate of the light guide plate. A plurality of through holes are provided inside the light guide plate, which can also reduce the weight of the light guide plate, which is more in line with the development trend of light guide components becoming lighter and lighter.

【附图说明】【Description of drawings】

图1是一种现有的导光板的侧视图。Fig. 1 is a side view of a conventional light guide plate.

图2是本发明导光板第一实施方式的剖视图。Fig. 2 is a cross-sectional view of the first embodiment of the light guide plate of the present invention.

图3是本发明导光板第一实施方式的俯视图。Fig. 3 is a top view of the first embodiment of the light guide plate of the present invention.

图4是本发明导光板第二实施方式的剖视图。Fig. 4 is a cross-sectional view of the second embodiment of the light guide plate of the present invention.

图5是本发明导光板第三实施方式的剖视图。Fig. 5 is a cross-sectional view of a third embodiment of the light guide plate of the present invention.

图6是本发明导光板第四实施方式的剖视图。Fig. 6 is a cross-sectional view of a fourth embodiment of a light guide plate of the present invention.

图7是本发明导光板第五实施方式的剖视图。Fig. 7 is a cross-sectional view of a fifth embodiment of the light guide plate of the present invention.

图8是本发明导光板第六实施方式的剖视图。Fig. 8 is a cross-sectional view of the sixth embodiment of the light guide plate of the present invention.

图9是本发明导光板第七实施方式的剖视图。9 is a cross-sectional view of a seventh embodiment of a light guide plate of the present invention.

图10是本发明导光板第八实施方式的剖视图。Fig. 10 is a cross-sectional view of the eighth embodiment of the light guide plate of the present invention.

图11是本发明导光板第九实施方式的剖视图。Fig. 11 is a cross-sectional view of the ninth embodiment of the light guide plate of the present invention.

【具体实施方式】【Detailed ways】

请参看图2和图3，分别是本发明导光板第一实施方式的剖视图和俯视图。该导光板10包括一入光面12，一与该入光面12相邻的出光面14，及一与该出光面相对的底面16。该导光板10的材质是透明材料，如聚甲基丙烯酸甲酯(Polymthyl Metharylate，PMMA)或聚碳酸酯(Polycarbonate，PC)。该导光板10组装入背光模组时，其入光面12侧会设置至少一光源19。Please refer to FIG. 2 and FIG. 3 , which are respectively a cross-sectional view and a top view of the first embodiment of the light guide plate of the present invention. Thelight guide plate 10 includes alight incident surface 12 , alight exit surface 14 adjacent to thelight incident surface 12 , and abottom surface 16 opposite to the light exit surface. The material of thelight guide plate 10 is a transparent material, such as polymethyl methacrylate (Polymthyl Metharylate, PMMA) or polycarbonate (Polycarbonate, PC). When thelight guide plate 10 is assembled into a backlight module, at least onelight source 19 is disposed on the side of thelight incident surface 12 .

该导光板10还包括多个圆形通孔18。该多个通孔18基本平行设置于该导光板10内部，与该底面16成一固定角度α，该角度α的大小为0＜α＜180°。该多个通孔18等距设置，其直径均相同。Thelight guide plate 10 also includes a plurality of circular throughholes 18 . The plurality of throughholes 18 are disposed substantially parallel to the inside of thelight guide plate 10 , and form a fixed angle α with thebottom surface 16 , and the magnitude of the angle α is 0<α<180°. The plurality of throughholes 18 are equidistantly arranged with the same diameter.

该多个通孔18在导光板10内部形成多个曲面，可为入射光线提供多个反射及折射面。光源19发出的光线进入导光板10后，光线可被该多个曲面反射及折射向出光面，可避免光程太长及多次反射造成的光损失，从而可提高导光板10的光利用率。导光板10内部设置多个通孔18，还可以减轻导光板10的重量，更加符合导光组件越来越轻量化的发展趋势。The plurality of throughholes 18 form a plurality of curved surfaces inside thelight guide plate 10 to provide a plurality of reflection and refraction surfaces for incident light. After the light from thelight source 19 enters thelight guide plate 10, the light can be reflected by the curved surfaces and refracted toward the light exit surface, which can avoid light loss caused by too long optical path and multiple reflections, thereby improving the light utilization rate of thelight guide plate 10. A plurality of throughholes 18 are provided inside thelight guide plate 10 , which can also reduce the weight of thelight guide plate 10 , which is more in line with the development trend of light guide components becoming lighter and lighter.

请参看图4，是本发明导光板第二实施方式的剖视图。该导光板20与第一实施方式的导光板10的区别在于：该导光板20的多个通孔28的直径并不统一，可根据出光要求设置为沿远离入光面22方向渐宽、渐窄或宽窄交替分布。Please refer to FIG. 4 , which is a cross-sectional view of the second embodiment of the light guide plate of the present invention. The difference between thelight guide plate 20 and thelight guide plate 10 of the first embodiment is that the diameters of the multiple throughholes 28 of thelight guide plate 20 are not uniform, and can be set to gradually widen and gradually widen along the direction away from thelight incident surface 22 according to the light output requirements. Narrow or alternately wide and narrow.

请参看图5，是本发明导光板第三实施方式的剖视图。该导光板30与第一实施方式的导光板10的区别在于：该导光板30的多个通孔38非等距设置，可根据出光要求设置为沿远离入光面32方向渐密、渐疏或疏密交替分布。Please refer to FIG. 5 , which is a cross-sectional view of a third embodiment of the light guide plate of the present invention. The difference between thelight guide plate 30 and thelight guide plate 10 of the first embodiment is that the plurality of throughholes 38 of thelight guide plate 30 are not equidistantly arranged, and can be set to be gradually denser or thinner along the direction away from thelight incident surface 32 according to the light output requirements. Or alternate density distribution.

请参看图6，是本发明导光板第四实施方式的剖视图。该导光板40与第一实施方式的导光板10的区别在于：该导光板40的多个通孔48一端与该导光板40的底面46贯通，另一端则分布于该导光板40的对角面上，且该多个通孔48沿远离入光面42方向高度渐升、渐降或高低交替分布。Please refer to FIG. 6 , which is a cross-sectional view of a fourth embodiment of the light guide plate of the present invention. The difference between thelight guide plate 40 and thelight guide plate 10 of the first embodiment is that one end of the plurality of throughholes 48 of thelight guide plate 40 passes through thebottom surface 46 of thelight guide plate 40 , and the other end is distributed on the opposite corner of thelight guide plate 40 surface, and the plurality of through-holes 48 are distributed along the direction away from the light-incident surface 42 with gradually rising heights, gradually falling heights, or alternating heights.

请参看图7，是本发明导光板第五实施方式的剖视图。该导光板50与第一实施方式的导光板10的区别在于：该导光板50的多个通孔58一端与该导光板50的出光面54贯通，另一端则分布于该导光板50的对角面上，且该多个通孔58沿远离入光面52方向高度渐升、渐降或高低交替分布。Please refer to FIG. 7 , which is a cross-sectional view of a fifth embodiment of the light guide plate of the present invention. The difference between the light guide plate 50 and thelight guide plate 10 of the first embodiment is that one end of the plurality of through holes 58 of the light guide plate 50 passes through the light-emitting surface 54 of the light guide plate 50 , and the other end is distributed on the opposite side of the light guide plate 50 . On the corner surface, the heights of the plurality of through holes 58 gradually rise, gradually fall, or are distributed alternately along the direction away from the light incident surface 52 .

请参看图8，是本发明导光板第六实施方式的剖视图。该导光板60与第一实施方式的导光板10的区别在于：该导光板60的多个通孔68非平行设置，其与底面66的夹角为β，该夹角β的大小为0＜β＜180°，且沿远离入光面62方向渐增或渐减。Please refer to FIG. 8 , which is a cross-sectional view of the sixth embodiment of the light guide plate of the present invention. The difference between thelight guide plate 60 and thelight guide plate 10 of the first embodiment is that the plurality of throughholes 68 of thelight guide plate 60 are arranged non-parallel, and the included angle between thelight guide plate 60 and thebottom surface 66 is β, and the size of the included angle β is 0< β<180°, and gradually increases or decreases along the direction away from thelight incident surface 62 .

请参看图9，是本发明导光板第七实施方式的剖视图。该导光板70与第一实施方式的导光板10的区别在于：该导光板70的多个通孔78互相交叉，交叉的通孔78位于垂直于入光面(未标示)的平面上。当然，交叉的通孔78分别位于不同的垂直于入光面的平面上，其正投影互相交叉，也可以实现同样的功效。Please refer to FIG. 9 , which is a cross-sectional view of a seventh embodiment of the light guide plate of the present invention. The difference between thelight guide plate 70 and thelight guide plate 10 of the first embodiment is that the throughholes 78 of thelight guide plate 70 intersect with each other, and the intersecting throughholes 78 are located on a plane perpendicular to the light incident surface (not shown). Of course, the intersecting through-holes 78 are respectively located on different planes perpendicular to the light-incident surface, and their orthographic projections intersect each other, which can also achieve the same effect.

请参看图10，是本发明导光板第八实施方式的剖视图。该导光板80与第一实施方式的导光板10的区别在于：该导光板80的多个通孔88呈开口背向入光面82的折线形。本实施方式的导光板80还具有意外的功效，即可用于双面发光背光模组，可大大增强双面发光效果。Please refer to FIG. 10 , which is a cross-sectional view of the eighth embodiment of the light guide plate of the present invention. The difference between the light guide plate 80 and thelight guide plate 10 of the first embodiment is that the plurality of throughholes 88 of the light guide plate 80 are in the shape of broken lines with openings facing away from thelight incident surface 82 . The light guide plate 80 of this embodiment also has an unexpected effect, that is, it can be used in a double-sided light-emitting backlight module, which can greatly enhance the double-sided light-emitting effect.

请参看图11，是本发明导光板第九实施方式的剖视图。该导光板90与第一实施方式的导光板10的区别在于：该导光板90的多个通孔98的形状为圆锥形。Please refer to FIG. 11 , which is a cross-sectional view of the ninth embodiment of the light guide plate of the present invention. The difference between thelight guide plate 90 and thelight guide plate 10 of the first embodiment is that the plurality of throughholes 98 of thelight guide plate 90 are conical in shape.

本发明的导光板还具有其它多种实施方式，例如：多个通孔也可以结合直径、间距及高度作多种组合变化；多个通孔也可以高度相同，且其仅一端贯穿导光板的底面或出光面；多个通孔的形状也可以是金字塔形或圆台形；导光板的出光面及底面可设置扩散点或作雾化处理。The light guide plate of the present invention also has other various implementation modes, for example: multiple through holes can also be changed in various combinations in combination with diameter, spacing and height; multiple through holes can also be of the same height, and only one end of them penetrates through the light guide plate The bottom surface or the light-emitting surface; the shape of the multiple through holes can also be pyramidal or truncated; the light-emitting surface and the bottom surface of the light guide plate can be provided with diffusion points or atomized.

Claims

1. light guide plate, it comprises an incidence surface, one exiting surface adjacent with this incidence surface, and one with this exiting surface opposed bottom surface, it is characterized in that: this light guide plate inside has a plurality of through holes, each through hole has at least an end to run through bottom surface or exiting surface, and these a plurality of through holes are the opening broken line shape of incidence surface dorsad, and the shape of these a plurality of through holes is pyramid or truncated cone-shaped.

2. light guide plate, it comprises an incidence surface, one exiting surface adjacent with this incidence surface, and one with this exiting surface opposed bottom surface, it is characterized in that: this light guide plate inside has a plurality of through holes, each through hole has at least an end to run through bottom surface or exiting surface, and these a plurality of through holes are the opening broken line shape of incidence surface dorsad, and the material of this light guide plate is polymethylmethacrylate or polycarbonate.

3. light guide plate, it comprises an incidence surface, one exiting surface adjacent with this incidence surface, and one with this exiting surface opposed bottom surface, it is characterized in that: this light guide plate inside has a plurality of through holes, and each through hole has at least an end to run through bottom surface or exiting surface, and these a plurality of through holes are the opening broken line shape of incidence surface dorsad, these a plurality of through holes are isometrical manholes, and substantially parallel equidistant setting.

4. light guide plate, it comprises an incidence surface, one exiting surface adjacent with this incidence surface, and one with this exiting surface opposed bottom surface, it is characterized in that: this light guide plate inside has a plurality of through holes, each through hole has at least an end to run through bottom surface or exiting surface, and these a plurality of through holes are the opening broken line shape of incidence surface dorsad, and this exiting surface is an atomization surface.

5. light guide plate, it comprises an incidence surface, one exiting surface adjacent with this incidence surface, and one with this exiting surface opposed bottom surface, it is characterized in that: this light guide plate inside has a plurality of through holes, each through hole has at least an end to run through bottom surface or exiting surface, and these a plurality of through holes are the opening broken line shape of incidence surface dorsad, and this bottom surface is provided with a plurality of diffusion points.

6. light guide plate, it comprises an incidence surface, one exiting surface adjacent with this incidence surface, and one with this exiting surface opposed bottom surface, it is characterized in that: this light guide plate inside has a plurality of through holes, each through hole has at least an end to run through bottom surface or exiting surface, and a plurality of through holes of this light guide plate cross one another, and the through hole of intersection is positioned on the plane perpendicular to incidence surface.

7. light guide plate as claimed in claim 6 is characterized in that: this exiting surface is an atomization surface.

8. light guide plate as claimed in claim 6 is characterized in that: this bottom surface is provided with a plurality of diffusion points.

9. light guide plate, it comprises an incidence surface, one exiting surface adjacent with this incidence surface, and one with this exiting surface opposed bottom surface, it is characterized in that: this light guide plate inside has a plurality of through holes, each through hole has at least an end to run through bottom surface or exiting surface, and a plurality of through holes of this light guide plate are positioned on the different planes perpendicular to incidence surface, and its orthogonal projection crosses one another.

10. light guide plate as claimed in claim 9 is characterized in that: these a plurality of through holes are isometrical manholes.