CN1766704A - Light guide panel and surface emitting device - Google Patents

Light guide panel and surface emitting device Download PDF

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Publication number
CN1766704A
CN1766704A CN 200410052035 CN200410052035A CN1766704A CN 1766704 A CN1766704 A CN 1766704A CN 200410052035 CN200410052035 CN 200410052035 CN 200410052035 A CN200410052035 A CN 200410052035A CN 1766704 A CN1766704 A CN 1766704A
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China
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surface
light
guide plate
light guide
projection
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CN 200410052035
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Chinese (zh)
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杨兴朋
金国藩
严瑛白
冯迪
刘海涛
谭峭峰
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清华大学
鸿富锦精密工业(深圳)有限公司
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Priority to CN 200410052035 priority Critical patent/CN1766704A/en
Publication of CN1766704A publication Critical patent/CN1766704A/en

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Abstract

The invention provides a light driving plate and panel illuminating apparatus. The light driving plate has up and down two layer structure, the down layer comprises at least one light incidence panel used to receive the light from the light source and a back-light panel on the bottom panel; the up layer comprises a base plate with a light exit panel on the surface of the upper panel and the bump arrange-formed on the bottom panel near the down layer of the light driving plate on the base plate. The panel illuminating apparatus adopts the light driving plate to evenly eject the light from the light exit panel of the light driving plate. It arranges the ladder structure on the up layer bottom panel of the light driving plate which can control the light exit angle of the light exit panel.

Description

导光板和面发光装置 Light guide plate and surface light emitting apparatus

【技术领域】本发明关于一种面发光装置,特别涉及一种具有凸起的导光板及其面发光装置。 TECHNICAL FIELD The present invention relates to a surface-emitting device, and particularly relates to a surface emitting device and a light guide plate having a projection.

【背景技术】近年来,平面显示器发展迅速,已被广泛应用于个人计算机、电视、移动通讯及消费性电子产品等领域,成为信息技术的一大平台。 BACKGROUND ART In recent years, the rapid development of flat-panel displays, has been widely used in personal computers, televisions, mobile communications and consumer electronics and other fields, has become a major platform for information technology. 同时,电子产品对平面显示装置(如液晶显示装置)的要求不断提高,高亮度、轻薄化、低成本、低能耗、高寿命成为面发光装置的发展方向。 At the same time, electronic products require device (liquid crystal display device) continues to increase, high brightness, light and thin, low-cost, low-power, high life direction of development of the surface-emitting flat display device.

按照光源放置位置的不同,面发光装置可以分为直射式和侧置式两类。 According to the different placement of the light source, the surface emitting device can be classified into two types of direct-mounted and a side. 直射式是指将光源置于导光板正下,直接照明。 Refers to a direct-type light source is placed directly below the light guide plate, direct illumination. 此类发光装置的缺点是厚度比较大,不符合当前消费者对其轻便的需求。 Disadvantage of such a light-emitting device thickness is relatively large, does not meet current consumer demand for its lightweight. 而侧置式面发光装置一般将光源置于导光板的侧面,光线由侧面耦合入导光板,在导光板内形成全反射并不断向前传播。 And the side surface of the light emitting device is generally mounted to a light source placed in the side surface of the light guide plate, light is coupled into the side surface of the light guide plate, totally reflected within the light guide plate and continue forward propagation. 通过对全反射条件的破坏,实现导光板出光面均匀射出。 By breaking the total reflection condition, the light guide plate to achieve a uniform surface emission. 这种结构薄且轻便,很适应市场需求。 This structure is thin and lightweight, it is to meet market demand. 关于导光板的材料、性能、原理、特性等方面的内容,请参阅李海峰等人在中国期刊《液晶与显示》,V18(1),58-62(2003),“高品质液晶显示器用轻薄背光源技术要点”一文中的相关介绍。 Details about aspects of the light guide plate material, performance, principles, characteristics, see Li Haifeng and others in the Chinese journal "liquid crystal display", V18 (1), 58-62 (2003), "High-quality LCD display with backlight thin source techniques "describes a related article.

请参照图1,为传统的侧置式面发光装置10的结构示意图。 Referring to FIG. 1, a conventional side-mounted surface 10 of the schematic structure of a light emitting device. 面发光装置10包括一光源12、一导光板11、一紧靠导光板11底部的反射片13、一叠置于导光板11之上的散射片14以及叠置于散射片14之上的两正交叠放的棱镜片15。 Surface-emitting device 10 includes a light source 12, a light guide plate 11, a guide plate 11 against the bottom 13 of the reflection sheet, a stack of two placed on the light guide plate 11 above the diffusion sheet 14 and the diffusion sheet 14 stacked on orthogonal prism sheet 15 stacked. 其中,导光板11包括正对于光源12的入光面111、底部反光面112、与反光面112相对的出光面113及与入光面111相对的端面114。 Wherein the light guide plate 11 to the light incident surface 111 includes a positive light source 12, the bottom of the reflecting surface 112, and a reflecting surface 112 opposing surface 113 and the light incident surface 111 and opposite end faces 114. 光源12发出的光通过入光面111耦合入导光板11内部,经反光面112的微结构反射,从出光面113均匀射出,再透过散射片14,使光线均匀散射,然后导入棱镜片15,将光集中在导光板出光面113的法线方向,照亮光接受元件,即实现面发光装置10的发光功能。 Source 12 is coupled into the light incident surface 111 by the light guide plate 11, reflected by the reflecting surface microstructure 112, a uniform light emitted from the light-receiving surface 113, and then transmitted through the diffusion plate 14, so that a uniform light scattering, the prism sheet 15 is then introduced into , concentrate the light in the normal direction of the surface 113 of the light guide plate, illuminating light receiving elements, i.e., to achieve a surface-emitting light emitting device 10 functions.

在图1所示传统结构中,导光板11的反光面112的凸起为圆弧形,光线在反光面发生漫反射,导致出光面出射的方向性比较差,能量利用率比较低。 In the conventional configuration shown in Figure 1, the reflective surface of the light guide plate 11 of the projection 112 is arcuate, the light diffusely reflected in the reflecting surface, the surface resulting in poor directionality emitted, energy efficiency is relatively low. 所以需要两层棱镜片提高光线的方向性,使光线向出光面法线方向集中,以提高亮度。 It is necessary to improve the directivity of two-layer sheet prism light, the light rays focus to the surface normal direction, to increase the brightness. 而棱镜片的采用提高了面发光装置的成本,并且也会降低光能利用率。 Using the prism sheet increases the cost of the surface light-emitting device, and also reduce the energy utilization.

1996年9月10日日公告的美国第5,555,329号专利提供一种具梯形凸起的导光板,该梯形凸起通过将倒梯形结构胶接固定在导光板出光面上。 U.S. Patent No. 5,555,329 September 10, 1996 announcement provides a light guide plate having a trapezoidal projection, which inverted trapezoidal convex trapezoidal configuration by fixing the light-glued surface of the guide plate. 这种结构将使得倒梯形凸起没有一个共同的基板,给制程带来不便。 This structure will not have a projection such that an inverted trapezoidal common substrate, to a process inconvenience.

2000年1月4日公告的美国第6,011,602号专利提供一种包括具倒梯形凸起导光板的发光装置。 January 4, 2000 announcement U.S. Patent No. 6,011,602 provided a light emitting device having an inverted trapezoidal projections of the light guide plate. 请参阅图2,为导光板凸起的局部放大图,导光板20具有一基板21及形成于基板21出光面22上的凸起23,该凸起23可为倒梯形结构,倒梯形侧面与出光面22法线的夹角θ小于10°。 Please refer to FIG. 2, the light guide plate is a partially enlarged view of the projection, the light guide plate 20 having a substrate 21 formed in the substrate 21 and the projections 23 on surface 22, the projection 23 can be an inverted trapezoid, an inverted trapezoid with the side 22 normal to the surface angle θ less than 10 °. 这种结构虽然可以一定程度上改善出射光的方向性,但倒梯形凸起和导光板基板合为一体,夹角较大时,很难脱模,不利于采用注模技术批量生产。 This structure can be improved to some extent, although the directivity of emitted light, but the light guide plate and inverted trapezoidal projections into one substrate, the angle is large, difficult to release, is not conducive to mass production using injection molding techniques. 而夹角太小时,又不足以将光线出射方向拉回到出光面法线方向。 When the angle is too small, and insufficient light exit direction back to the surface normal direction. 而且该发光装置还需用棱镜片来控制出射光的角度,以增加亮度,但是相应地提高了成本。 The light-emitting device and the need to use a prism sheet for controlling the angle of the emitted light, to increase the brightness, but a corresponding increase in cost.

综上所述,提供一种成型简便,并能灵活控制出光面光线出射角度的导光板,以及一种无需棱镜片,成本低,制程简便,并能灵活控制出光面光线出射角度的面发光装置实为必要。 In summary, there is provided a molding is simple, and enables flexible control of the surface light exit angle guide plate, a prism sheet and one without, low cost, simple manufacturing process, and to a flexible control apparatus of a surface-emitting surface of the light exit angle in fact, necessary.

【发明内容】为了解决现有技术中导光板难以制造成型以及出射光角度控制范围小等不足,本发明提供一种成型简便,并能灵活控制出射光角度的导光板。 SUMMARY OF THE INVENTION In order to solve the prior art is difficult to manufacture a light guide plate and emitted light forming a small angle control range and other issues, the present invention provides a simple molding, and the flexibility to control the angle of the emitted light guide plate.

为了解决现有技术中面发光装置需要棱镜片,以致于成本过高,并且出射方光角度控制范围小等不足,本发明提供一种成本低,结构简便,并能灵活控制出射光角度的面发光装置。 In order to solve the prior art surface emitting device needs a prism sheet, so that the cost is too high, and the light outgoing side of the control of small angular range and other issues, the present invention provides a low-cost, simple structure, and the flexibility to control the angle of the outgoing light plane the light emitting device.

为实现上述第一个目的,本发明提供一种导光板,包括至少一用于接受光源发出光的入光面、一位于底部的反光面及一相对于该反光面的出光面;所述导光板具有上下两层结构,所述导光板的入光面及反光面形成于导光板下层,所述导光板上层包括一基板,所述导光板的出光面形成在该基板表面上,相对于所述出光面的基板底面排列形成有凸起,所述凸起底面宽于与其平行且紧贴导光板下层表面的凸起顶面。 To achieve the above first object, the present invention provides a light guide, comprising at least a light incident surface for receiving light emitted light, a reflection surface located at a bottom portion and with respect to the surface of the reflective surface; said guide light board has upper and lower two-layer structure, the surface of the light guide plate and a lower reflective surface is formed on the light guide plate, the light guide comprises an upper layer substrate, the light guide plate exit surface is formed on the substrate surface, with respect to said bottom surface of the substrate formed with the light receiving surface are arranged a protrusion on the bottom face width parallel and close to the top surface of the lower surface of the projection light guide plate.

其中,所述凸起按照离光源越近分布越疏、离光源越近尺寸越小的周期性变化顺序排列,所述周期长度范围在10微米~150微米之间,所述凸起顶面宽度范围为10微米~60微米,所述凸起底面宽度与凸起高度之比例范围为1∶2至2∶1,所述凸起的侧面为平面、折面或曲面,所述凸起的侧面与导光板的出光面法线的夹角范围为10°~45°,以30°为佳,所述导光板的反光面和/或入光面在垂直于光源的方向排列形成有按一定周期变化的V型槽结构,所述V型槽结构的周期长度范围在10微米~100微米之间,所述V型槽的顶角范围为60°~140°。 Wherein the projections are arranged in closer from the light source distribution is sparse, the smaller the source size the closer sequentially changed periodically, the periodic ranging in length from between 10 microns to 150 microns, the width of the top surface of the projection in the range of 10 microns to 60 microns, a width of the bottom surface of the protrusion height of the projection range of the ratio of 1:2 to 2:1, the projection side surface is flat, curved or folded surface, said convex side surface the surface normal of the light guide plate in an angle range of 10 ° ~ 45 °, preferably 30 ° to the reflecting surface of the light guide plate and / or the light incident surface is formed in the direction perpendicular to the light source are arranged with a fixed interval V-groove structure changes, the cycle length of the V-shaped groove structure is between 10 microns to 100 microns, an apex angle range of the V-shaped groove is 60 ° ~ 140 °.

为实现上述第二个目的,本发明提供一种面发光装置,包括一光源、一导光板及一反射片,其中导光板具有至少一用于接受光源发出光的入光面、一位于底部的反光面及一相对于该反光面的出光面,所述反射片紧贴导光板的反光面;所述导光板具有上下两层结构,所述导光板的入光面及反光面形成于导光板下层,所述导光板上层包括一基板,所述导光板的出光面形成于该基板表面上,相对于所述出光面的基板底面排列形成有凸起,所述凸起底面宽于与其平行且紧贴导光板下层表面的凸起顶面。 To achieve the above second object, the present invention provides a surface-emitting device, comprising a light source, a light guide plate and a reflection sheet, wherein at least the light guide plate having a light incident surface for receiving light emitted light, at the bottom of a and a light-reflecting surface with respect to the surface close to the reflective surface, the reflective surface of the reflective sheet of the light guide plate; plate having upper and lower two-layer structure, the surface of the light guide plate and the reflective surface is formed on the light guide plate a lower layer, said upper layer comprises a light guide plate substrate, the surface of the light guide plate is formed on the substrate surface, with respect to the bottom surface of the substrate with a surface is arranged to form a protrusion on the bottom face width and parallel thereto the light guide plate against the lower surface of the boss top surface.

其中,所述凸起按照离光源越近分布越疏、离光源越近尺寸越小的周期性变化顺序排列,所述周期长度范围在10微米~150微米之间,所述凸起顶面宽度范围为10微米~60微米,所述凸起底面宽度与凸起高度之比例范围为1∶2至2∶1,所述凸起的侧面为平面、折面或曲面,所述凸起的侧面与导光板的出光面法线的夹角范围为10°~45°。 Wherein the projections are arranged in closer from the light source distribution is sparse, the smaller the source size the closer sequentially changed periodically, the periodic ranging in length from between 10 microns to 150 microns, the width of the top surface of the projection in the range of 10 microns to 60 microns, a width of the bottom surface of the protrusion height of the projection range of the ratio of 1:2 to 2:1, the projection side surface is flat, curved or folded surface, said convex side surface the surface normal of the light guide plate with an angle in the range of 10 ° ~ 45 °.

与现有技术相比,本发明的导光板具有上下两层结构,上层结构的底面排列形成有类似于倒梯形的凸起,该结构可方便的利用注模、刻蚀、胶接等技术制造成型。 Compared with the prior art, the light guide plate of the present invention has upper and lower two-layer structure, manufactured with technology similar to an inverted trapezoidal projection, the structure can be easily molded by injection, etching, adhesive bonding or the like arranged to form the bottom surface of the upper structure forming. 同时,该凸起侧面的倾角范围选择性较大,且不会影响导光板的脱模,从而,可通过该凸起侧面的倾角变化,灵活控制出射光线的方向,使其沿垂直于导光板出光面的方向出射。 At the same time, the projection angle range of the side surface greater selectivity, without affecting the release of the light guide plate, so that, by the change in inclination of the projection side surface, and control the direction of the emergent light, so that a direction perpendicular to the light guide plate the direction of the exit surface.

而本发明的面发光装置无需棱镜片,可节省成本,使其结构更加简便,并通过采用本发明所提供的类似于倒梯形凸起的导光板,可通过该凸起侧面的倾角变化,灵活控制出射光线的方向,使其沿垂直于导光板出光面的方向出射。 The surface-emitting device of the present invention without the prism sheet, cost savings, its structure is easier, and by using the light guide plate similar to the inverted trapezoidal projections provided by the present invention, the side through which the projection angle changes, flexible controlling the direction of the emitted light, the light guide plate so that the direction of the exit surface of the vertical.

【附图说明】图1是现有技术的面发光装置结构示意图;图2是现有技术的导光板凸起结构示意图;图3是本发明的面发光装置结构示意图;图4是本发明的导光板上层结构示意图;图5是本发明的导光板上层第一种凸起结构示意图; BRIEF DESCRIPTION FIG. 1 is a schematic view of a surface emitting device structure of the prior art; FIG. 2 is a schematic structural diagram of the prior art projection light guide plate; FIG. 3 is a schematic view of a surface emitting device structure of the present invention; FIG. 4 of the present invention is schematic structural diagram of an upper guide plate; FIG. 5 is an upper guide plate according to the present invention, a schematic structural diagram of a first projection;

图6是本发明的导光板上层第二种凸起结构示意图;图7是本发明的导光板上层第三种凸起结构示意图;图8是本发明的导光板下层反光面V型槽结构示意图;图9是本发明的导光板下层入光面V型槽结构示意图;图10是本发明的导光板下层V型槽结构示意图;图11是本发明的导光板上层基板镀膜结构示意图;图12是本发明的导光板上层镀膜结构示意图;图13是本发明的导光板下层镀膜结构示意图。 FIG 6 is a schematic structural diagram of a second upper guide plate according to the present invention, protrusions; FIG. 7 is a schematic structural diagram of the light guide plate of the present invention, the upper third protrusions; FIG. 8 is a structural diagram reflecting surface V groove type light guide plate according to the present invention, the lower layer ; FIG. 9 is a schematic view of the surface light guide V-shaped groove structure of the lower layer of the present invention; FIG. 10 is a structural diagram V lower groove type light guide plate according to the present invention; FIG. 11 is a structural diagram of guide plate upper substrate film of the present invention; FIG. 12 It is a schematic view of the light guide plate of the upper layer film structure of the present invention; FIG. 13 is a schematic view of the light guide plate lower plating film structure of the present invention.

【具体实施方式】下面结合附图对本发明作进一步详细说明。 DETAILED DESCRIPTION OF DRAWINGS] The present invention is further described in detail.

请参阅图3,是本发明提供的面发光装置结构示意图。 See FIG. 3 is a schematic view of the structure of a surface emitting device provided by the invention. 面发光装置30包括一导光板31、至少一靠近导光板31侧面的光源32以及一紧靠导光板31底部的反射片33。 Surface-emitting device 30 includes a guide plate 31, light source 31 close to at least one side surface of the light guide plate 32 and a guide plate 31 against the bottom 33 of the reflection sheet. 其中,导光板31具有上下层结构,下层结构具有至少一靠近光源32的入光面311、底部反光面312、与入光面312相对的端面313。 Wherein the light guide plate 31 having the underlying structure, the lower structure having at least a light incident surface 311 near the light source 32, the bottom of the reflecting surface 312, and opposite end faces 312 into the surface 313. 上层结构包括一基板34,基板34至少具有一面对导光板下层的基板底面341及一相对于基板底面341的出光面342。 An upper structure includes a substrate 34, a substrate 34 having at least a bottom surface of the light guide plate facing the lower substrate 341 and the bottom surface of the substrate 341 relative to the surface 342 a. 在基板底面341上排列形成有凸起35,并按离光源越近分布越疏、离光源越近尺寸越小的周期性变化顺序排列。 On the bottom surface of the substrate 341 is formed with projections 35 are arranged, according to the closer light source distribution sparse periodic variation closer sequentially arranged smaller source size. 凸起35具有一凸起底面351(如图中虚线所示)、凸起顶面352及与出光面342的法线成一定倾角的凸起侧面353,其中,该凸起底面351与凸起顶面352相互平行,且该凸起底面351的宽度大于凸起顶面352,该凸起侧面353可为平面、折面或曲面,凸起侧面353的倾角范围为10°~45°。 Projection 35 having a convex bottom surface 351 (shown in dashed line), a top surface 352 and a convex projection and a side surface 353 at an angle of inclination of the normal line 342, wherein the bottom surface of the projection 351 and the projection a top surface 352 parallel to each other, and the protrusion bottom surface 351 is greater than the width of the top surface of the projection 352, the projection side surface 353 may be flat, curved or folded surface, the projection angle of the side surface 353 is 10 ° ~ 45 °.

光源32通常为点光源或线光源,如荧光管、冷阴极灯管或发光二极管等,并可采用单光源或双光源两种不同的形式。 The light source 32 is typically a point light source or line light source, such as a fluorescent tube, a cold cathode fluorescent lamp or a light emitting diode, and a single or dual light sources in two different forms. 当采用单一光源32时,反射片33可采用传统结构,用其包覆导光板31的反光面312及端面313,使光线不会从其两面漏出,从而可以提高光能利用率。 When using a single light source 32, the reflective sheet 33 can be of conventional construction, which is coated with a reflecting surface 31 of the light guide plate 312 and the end 313, so that light does not leak out from both sides, thereby improving energy efficiency. 当采用双光源32,即在导光板31的端面313还设置另一光源时,反射片33只需覆盖导光板31的反光面312。 When using dual light source 32, i.e. the end face in the light guide plate 31331 is provided another light source, a reflective sheet 33 covers only the light guide plate 31 of the reflecting surface 312.

当光源32发出的光线1通过入光面311耦合进入导光板31内部,经反光面312的微结构反射,再透过上层凸起顶面352,然后被凸起35的侧面353反射,最后沿着出光面342的法线方向射出。 When the light emitted from the light source 32 enters a light guide plate 31 through the coupling surface 311, reflected by the reflecting surface of the microstructures 312, 352 and then through a top surface of the upper projection, then the projection side surface 353 of the reflector 35, and finally along 342 with the surface normal direction is emitted. 而光线2经反射后并不能到达凸起顶面352,此时,其将在下层结构中被反射片33多次反射,直到能透过上层凸起顶面352,然后与光线1同样沿着出光面342的法线方向射出。 2 after the light is reflected and does not reach the top surface of the projection 352, this time, the reflection sheet 33 which will be reflected in the lower layer structure a plurality of times, until the top surface of the projection can pass through the upper layer 352, and then along the same light 1 normal direction of the surface 342 is emitted. 这些光线照亮光接受元件,即实现面发光装置30的均匀射出。 The light illuminates the light receiving elements, i.e., to achieve a uniform surface-emitting device 30 is emitted.

请参阅图4,是本发明的导光板31上层结构示意图。 Please refer to FIG. 4, the superstructure 31 is a schematic diagram of the light guide plate of the present invention. 图中将其向上翻转,以便清楚显示导光板31上层结构,其包括一基板34以及在其基板底面341上排列形成相互平行的凸起35,通常由透明材料制成。 FIG thereof will be turned upwards, in order to clearly show the structure of the upper guide plate 31, which includes a substrate 34 and are arranged parallel to each other are formed in the bottom surface of the substrate 341 on which protrusions 35, typically made of a transparent material. 其中该凸起35平行于光源32,具类似于倒梯形的结构,即凸起顶面352宽度小于与其相对的凸起底面351(如图中虚线所示),而凸起侧面353可为平面,即为正倒梯形(如图5所示);也可为多个侧面构成的折面(如图6所示),根据对出光面342出射光线方向性的要求,选择凸起35各个侧面的倾角,以控制各个方向的光线反射至出光面342的方向;或者采用曲面结构(如图7所示),同样,根据对出光面出射光线方向性的要求,选择曲面的形状,以控制光线反射至出光面342的方向。 Wherein the projection 35 is parallel to the light source 32, having a structure similar to an inverted trapezoid, i.e., the top surface of the projection 352 is smaller than the width of the bottom surface of the protrusion 351 opposed thereto (as shown in dashed line), while the side surface 353 may be planar projection , n is the inverted trapezoid (Fig. 5); may also be folded surface side surface composed of a plurality (shown in Figure 6), according to the requirements of the light emitting surface 342 directionality, select each side protrusion 35 angle of inclination, to control the respective directions of the light beam to the direction of surface 342; or with a curved surface configuration (FIG. 7), similarly, according to the requirements of the light exit surface directionality, select the surface shape to control the light 342 to the reflecting surface direction. 然而,不管凸起35采用哪种类型结构,其凸起底面351的宽度与凸起高度的比例范围为1∶2至2∶1,优选为1∶1;而凸起侧面353与基板34的出光面342法线的夹角范围为10°~45°,以30°为佳,以控制出光的方向;凸起顶面352的宽度范围为10微米~60微米,以控制从导光板31下层进入其上层光线的通量。 However, regardless of what type of structure using the projection 35, which projection height of the projection width ratio range to the bottom surface 351 of 1:2 2:1, preferably 1:1; the projection 353 and the side surface 34 of the substrate 342 angles between the surface normals of 10 ° ~ 45 °, preferably of 30 °, in order to control the direction of light; width of top surface of the protrusion 352 is 10 microns to 60 microns, the lower guide plate 31 to control the light flux which enters the upper layer. 并且,凸起35按距离光源32的远近由疏到密顺序排列,即在距离光源32近的面积上,凸起35排列稀疏;而距离光源32远的面积上,凸起35排列密集。 Further, the projections 35 are arranged according to the distance from the light source 32 sequentially from sparse to dense, i.e. in the area from the light source 32 near the projections 35 are arranged sparsely; and the area far from the light source 32, the projections 35 are arranged densely. 同样,凸起35大小按距离光源32的远近由小到大顺序排列,即在距离光源32越远,凸起35就越大。 Similarly, the projection of distance 35 according to the size of the light source 32 are arranged in ascending order, i.e., the greater the projection 35 away from the light source 32. 另外,凸起3 5这种排列密度及大小大变化可按一定的周期发生变化,该凸起35的变化周期长度可以为一个较大的范围,如10~150微米,只要能避免产生光的干涉现象,或避免人眼通过显示屏看到凸起35成的像即可。 Further, this arrangement of the projections 35 and the size of the large density change in a certain cycle can be changed, the projection 35 may change the length of cycle to a large range, such as 10 to 150 microns, can be avoided as long as the light interference phenomena, or to avoid the human eye to see the image can be raised to 35 by the display. 通过对凸起35这种变化调节,可以实现导光板对出射光的角度控制,使光线从出光面342均匀射出。 This variation of the adjustment projection 35, the light guide plate can be achieved for controlling the angle of light emitted by the light emitted from the surface 342 uniform.

请参阅图8、9、10,是本发明的导光板下层反光面及入光面V型槽结构示意图。 Referring to FIG 8,9,10, the light guide plate is the lower reflecting surface and the groove of the present invention into a structural diagram of a V-shaped surface. 如图8所示,导光板下层结构的反光面312设置成多个V型槽结构,V型槽延伸方向处于与线状光源垂直的方向上,且互相平行。 8, the reflecting surface of the light guide plate 312 disposed underlying structure into a plurality of V-groove structure, a V-groove extending in a direction perpendicular to the light source on the linear direction and parallel to each other. 以控制光线在平行于线状光源方向的输出角度。 To control the light output angular direction parallel to the linear light source. V型槽的深度一般不超过100微米。 V-groove depth is generally not more than 100 microns. 同样,在入光面311也可设置成V型槽结构(如图9所示),V型槽在与线状光源垂直的方向上,且互相平行。 Also, the light incident surface 311 may be provided in a V-groove structure (9), with the V-groove in a direction perpendicular to the linear light source, and parallel to each other. 根据光源发散角的不同,上述两V型槽的顶角可以在一个很大的范围内变化,如60°~140°,以120°为佳。 Depending on the divergence angle of the light source, the apex angle of said two V-grooves may vary within a wide range, such as 60 ° ~ 140 °, preferably by 120 °. V型槽还可按一定周期发生变化,周期长度不能太小,以避免产生光的干涉现象,也不能太大,避免在人眼通过显示屏看到V型槽的像,一般在10~100微米之间为佳。 V-grooves may also occur on a cycle, the cycle length is not too small, to avoid interference phenomenon of light, it can not be too large, to avoid the human eye to see the image through the display V-groove, generally 10 ~ 100 preferably between microns. 当同时将反光面312及入光面311都设有V型槽结构(如图10所示),即可提高入光面311的耦合效率,又能提高光线在平行于光源方向的均匀性,克服阴影现象。 When both the surface 312 and the reflective surface 311 has a V-shaped groove structure (Figure 10), to improve the coupling efficiency into the light-receiving surface 311, but also improve the uniformity of the direction parallel to the light source, to overcome the shadow phenomenon.

请参阅图11、12、13,分别为本发明的导光板相关表面的镀膜结构示意图。 Please refer to FIG. 11, 12, a schematic structure of the light guide plate associated surface coating of the present invention, respectively. 在导光板31的基板34的底面341镀反射膜(如图11所示),当外部光线射入导光板31上层时会被底面34反射膜所反射,从而提高能量利用率。 In the bottom surface of the light guide plate 341 of the substrate 31 coated reflective film 34 (FIG. 11), when external light is incident on the upper guide plate 31 is reflected by the bottom surface of the reflective film 34, thereby improving energy efficiency. 还可在凸起侧面353镀反射膜(如图12所示),可以更多的反射来自外部的光线,防止光从凸起侧面353漏出导光板31,进一步提高能量利用率。 Side protrusion 353 may also plated reflective film (12) can be more reflected light from the outside, to prevent the light guide plate 353 from leaking from the projection 31 side, further improving energy efficiency.

此外在导光板31的反光面312和端面313镀反射膜,同样可以防止光线从导光板31的反光面312和端面313漏出(如图13所示),可省去反射片33,节约成本,提高能量利用率。 Further, in the reflective surface of the light guide plate 31 and the end face 312 of the coated reflection film 313, the same can prevent light from reflecting surface 312 and the end face 31 of the light guide plate 313 from leaking (13), the reflective sheet 33 may be omitted, cost savings, improve energy efficiency.

在导光板31的上层与下层相接触介面的空隙部分为空气或其他低折射率物质,所以光线在导光板下层部分内可以形成全反射。 In the light guide plate 31 of the upper and lower contact interface space portion is air or other low index material, the light can be totally reflected within the light guide plate in the lower portion. 因而,光源32发出的光线由入光面311耦合进入导光板31内部时,由于反光面312和端面313镀有反射镀膜,大部分光线被反射,并透过上层凸起顶面352,进一步被凸起侧面353的反射镀膜所反射,最后沿着出光面342的法线方向射出。 Accordingly, when the light emitted from the light source 32 enters the light guide plate 31 from the light incident surface 311 is coupled, since the reflecting surface 312 and the end face coated with a reflective coating 313, most of the light is reflected, and the projections 352 through the top surface of the upper layer, is further reflective coated side of the projection 353 is reflected, and finally emitted along a normal direction of the surface 342. 另有部分光线在下层结构中被反射片33多次全反射,直到透过凸起顶面352,同样被凸起侧面353的镀膜反射,并从出光面342的法线方向射出。 Another portion of the light is reflected in the lower layer sheet structure 33 is totally reflected a plurality of times, until 352, likewise convex reflective film side through the convex top surface 353, and emitted from the normal direction of the surface 342. 通过上述方式,即实现出射光角度的控制,使光线从导光板31的出光面342均匀射出。 By the above manner, i.e. to achieve the control of the light emission angle, so that the light guide plate 31 from the exit surface 342 is emitted uniformly.

本发明的导光板相关表面的镀膜可采用铝膜或银膜,如只使用反射片33,则可在其反射光的表面镀上铝膜或银膜,以实现高反射。 Coating the light guide plate of the present invention is related to the surface of an aluminum film or a silver film may be employed, such as using only the reflection sheet 33 may be coated with aluminum film or a silver film on the surface reflected light, in order to achieve high reflectance. 通过这些反射膜,还可使面发光装置实现透射式和反射式两种照明。 These reflective films, but also to the surface-emitting device to achieve two kinds of transmissive and reflective illumination.

本发明的导光板一般由聚甲基丙烯酸酯、聚碳酸酯等折射率较大的透明材料制成,而整个导光板可以方便的采用注模、刻蚀、胶接等方法制作成型。 The light guide plate of the present invention is generally composed polymethacrylate, polycarbonate or the like is made larger refractive index transparent material, and the entire light guide plate can easily by injection molding, etching, bonding or the like formed article.

Claims (11)

1.一种导光板,包括至少一用于接受光源发出光的入光面、一位于底部的反光面及一相对于所述反光面的出光面;其特征在于:所述导光板具有上下两层结构,所述导光板的入光面及反光面形成于导光板下层,所述导光板上层包括一基板,所述导光板的出光面形成于该基板表面,相对于所述出光面的基板底面排列形成有凸起,所述凸起底面宽于与其平行且紧贴导光板下层表面的凸起顶面。 1. A light guide, comprising at least a light incident surface for receiving light emitted light, a light-reflecting surface and at the bottom a reflecting surface with respect to the light exit surface; wherein: the light guide plate having upper and lower layer structure, the surface of the light guide plate and a lower reflective surface is formed on the light guide plate, the light guide comprises an upper layer substrate, the light guide plate exit surface is formed on the surface of the substrate, the substrate with respect to the light emitting surface a bottom surface arranged to form a protrusion, the protrusion top surface of the bottom projection wide in parallel and close to the lower surface of the light guide plate.
2.如权利要求1所述的导光板,其特征在于:所述凸起按照离光源越近分布越疏、离光源越近尺寸越小的周期性变化顺序排列。 2. The light guide plate according to claim 1, wherein: said projections are arranged in closer from the light source distribution is sparse, the smaller the source size the closer sequentially changed periodically.
3.如权利要求2所述的导光板,其特征在于:所述周期长度范围在10微米~150微米之间。 The light guide plate according to claim 2, wherein: said cycle length ranging between 10 microns to 150 microns.
4.如权利要求3所述的导光板,其特征在于:所述凸起顶面宽度范围为10微米~60微米。 4. The light guide plate according to claim 3, wherein: said projection top surface width in the range of 10 microns to 60 microns.
5.如权利要求4所述的导光板,其特征在于:所述凸起底面宽度与凸起高度之比例范围为1∶2至2∶1。 5. The light guide plate according to claim 4, wherein: the width of the bottom surface protrusion height of the projection range of the ratio of 1:2 to 2:1.
6.如权利要求5所述的导光板,其特征在于:所述凸起的侧面为平面、折面或曲面。 6. The light guide plate according to claim 5, wherein: said projection side surface is flat, curved or folded surface.
7.如权利要求6所述的导光板,其特征在于:所述凸起的侧面与导光板的出光面法线的夹角范围为10°~45°。 7. The light guide plate according to claim 6, wherein: the light guide plate side surface of the projection of the surface normal of the angle range of 10 ° ~ 45 °.
8.如权利要求7所述的导光板,其特征在于:所述导光板的反光面和/或入光面在垂直于光源的方向排列形成有按一定周期变化的V型槽结构。 8. The light guide plate according to claim 7, wherein: the reflecting surface of the light guide plate and / or the light incident surface is formed in the direction perpendicular to the arrangement of the light source has a certain cycle V-groove structure.
9.一种面发光装置,包括一光源、导光板及一反射片,其中导光板具有至少一接受光源发出光的入光面、一位于底部的反光面及一相对于所述反光面的出光面,所述反射片紧贴导光板的反光面;其特征在于:所述导光板具有上下两层结构,所述导光板的入光面及反光面形成于导光板下层,所述导光板上层包括一基板,所述导光板的出光面形成于该基板表面,相对于所述出光面的基板底面排列形成有凸起,所述凸起底面宽于与其平行且紧贴导光板下层表面的凸起顶面。 A surface-emitting device, comprising a light source, a light guide plate and a reflector, wherein the light guide plate having at least one light source emits light into the receiving surface, located at the bottom of a reflecting surface and the reflecting surface of the light with respect to a surface, the reflective surface reflecting the light guide plate against the sheet; characterized in that: said upper and lower guide plate having a two-layer structure, the surface of the light guide plate and light-reflecting surface formed on a lower guide plate, the upper guide plate comprising a substrate, a light guide plate exit surface is formed on the substrate surface, with respect to the bottom surface of the substrate with a surface is arranged to form a protrusion on the bottom face width against the guide plate parallel to the underlying surface and a convex from the top surface.
10.如权利要求9所述的面发光装置,其特征在于:所述凸起按照离光源越近分布越疏、离光源越近尺寸越小的周期性变化顺序排列。 10. The surface emitting device according to claim 9, wherein: said projections are arranged in closer from the light source distribution is sparse, the smaller the source size the closer sequentially changed periodically.
11.如权利要求10所述的面发光装置,其特征在于:所述凸起的侧面为平面、折面或曲面。 11. The surface emitting device according to claim 10, wherein: said projection side surface is flat, curved or folded surface.
CN 200410052035 2004-10-29 2004-10-29 Light guide panel and surface emitting device CN1766704A (en)

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