CN102455458B - The light guide means and the backlight module - Google Patents

The light guide means and the backlight module Download PDF

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CN102455458B
CN102455458B CN 201010517026 CN201010517026A CN102455458B CN 102455458 B CN102455458 B CN 102455458B CN 201010517026 CN201010517026 CN 201010517026 CN 201010517026 A CN201010517026 A CN 201010517026A CN 102455458 B CN102455458 B CN 102455458B
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surface
base
portion
light
light guide
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CN102455458A (en )
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简仲鸿
郑文峰
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颖台科技股份有限公司
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Abstract

本发明公开了一种导光装置及背光模块,该导光装置包括一本体及多个微结构部,该本体具有折射率n,且包括一出光面、一基础面及至少一入光面,该基础面与该出光面相距一厚度T;该些微结构部位于该基础面上,每一微结构部的宽度P,且包括一第一距离L1及一第二距离L2,两微结构部的间距S。 The present invention discloses a light guide device and a backlight module, the light guiding means comprises a body portion and a plurality of microstructures, the body having a refractive index n, and comprising a surface, a base surface and at least a light incident surface, the base surface and the light emitting surface spaced a thickness T; the micro structures of the base face portion is located, the width of each microstructure portion P, and comprises a first distance L2, L1 and the two micro-structure portion of a second distance spacing S. 其中,该导光装置满足关系式如下:由此,该导光装置及其使用的背光模块会具有最佳的光学均匀度。 Wherein the light guide device satisfies the following relationship: Thus, the light guide device and backlight module will use the best uniformity of intensity.

Description

导光装置与背光模块 The light guide means and the backlight module

技术领域 FIELD

[0001] 本发明涉及一种导光装置及使用该导光装置的背光模块,特别涉及一种同时具有导光与光扩散效果的导光装置及其使用的背光模块。 [0001] The present invention relates to a light guide device and backlight module using the light guide device, in particular it relates to a backlight module having a light guide device for simultaneously guiding light and the light diffusing effect of its use.

背景技术 Background technique

[0002] 近年来,传统的阴极射线管显示器(即俗称的CRT显示器)已渐渐地被液晶显示器所取代,主要原因在于液晶显示器所释放出的辐射量远远小于CRT显示器,另外,液晶显示器在这几年的制造成本已有显著地降低,这也是液晶显示器逐渐成为电视或计算机屏幕市场的主流的原因。 [0002] In recent years, the conventional cathode ray tube displays (commonly known as CRT display) have been gradually replaced by liquid crystal displays, liquid crystal displays mainly due to the release of a CRT display is far less than the amount of radiation, Furthermore, the liquid crystal display manufacturing costs in recent years have been significantly reduced, which is a liquid crystal display gradually become mainstream television or computer screen market reasons.

[0003] 一般而言,液晶显示器均包括一液晶面板及一背光模块;在小尺寸的液晶显示器中,为了避免液晶显示器的厚度过大或者成本过高,通常会使用侧边式的背光模块。 [0003] In general, a liquid crystal display device includes a liquid crystal panel and a backlight module; a small-sized liquid crystal display, the thickness of the liquid crystal display in order to avoid too large or too costly, often using an edge-type backlight module. 通常,侧边式背光模块会包括一导光装置及至少一光源,该光源设置在该导光装置的侧边,使该光源所射出的光线,其光学路径由导光装置的侧边进入后,光线在导光装置内部传递,再从导光装置的其中一面射出。 Typically, the side-type backlight module comprises a light guide means and at least one light source disposed on the side of the light guide means so that the light emitted from the light source, the optical path into a rear side of the light guide means light transmitting inside the light guide means, and then is emitted from the side where the light guide means. 其中,导光装置最重要的作用,是通过微结构的设置或反射网点的局部反射而导引光线,使光线均匀地自该导光装置的表面射出。 The most important role of the light guide means, and is guided by the light reflective or partially reflective dots arranged microstructures, so that the light emitted from uniformly the surface of the light guide means.

[0004] 然而,因为结构上的限制,该导光装置所射出的光线通常会呈明暗相间的“暗带现象”,使得整个背光模块的均匀度不佳,影响用户的视觉观感。 [0004] However, because of restrictions on the structure of the light guiding means usually emitted light was bright and dark "dark band phenomenon", so that the uniformity of the entire backlight module poor, affecting the user's visual perception.

发明内容 SUMMARY

[0005] 本发明实施例的目的是针对上述现有技术的缺陷,提供一种导光装置,使导光装置射出的光线具有较佳的均匀度,消除背光模块的“暗带现象”,进而提升液晶显示器的光学效果。 [0005] The object of embodiments of the present invention is directed to a defect of the prior art, to provide a light guiding means so that light emitted from the light guide means having better uniformity, eliminate the backlight module "dark band phenomenon", and then enhance the optical effect of a liquid crystal display.

[0006] 为了实现上述目的本发明采取的技术方案是: [0006] To achieve the above object of the present invention takes the following technical solution:

[0007] 本发明提供一种导光装置,其包括一本体及多个微结构部,该本体具有折射率n,且包括一出光面、一基础面及至少一入光面,该入光面位于该出光面之一侧,该基础面与该出光面相对应,且该基础面与该出光面相距一厚度T ;该些微结构部位于该基础面上,每一微结构部还包括相距一宽度P的一第一基部与一第二基部、一顶点部、一第一反射面、一第二反射面及一平坦单元;其中,该第一反射面连接该第一基部与该顶点部,且该第一基部与该顶点部相距一第一距离L1,该第二反射面连接该第二基部与该顶点部,且该第二基部与该顶点部相距一第二距离L2,该平坦单元位于该第二基部与第一基部之间,该第二基部与第一基部相距一间距S,且满足关系式如下: [0007] The present invention provides a light guide, which includes a main body portion and a plurality of microstructures, the body having a refractive index n, and comprising a surface, a base surface and at least a light incident surface, the light incident surface the surface of one side is located, the base surface and the light exit surface corresponding to the base surface and the light emitting surface spaced a thickness T; the micro structures located at the base face portion, each portion further comprises a microstructure having a width distance P is a first base and a second base portion, an apex portion, a first reflecting surface, a reflection surface and a second planar cell; wherein the first reflective surface connecting the first vertex to the base portion, and the first base portion to the vertex portion spaced a first distance L1, the second base portion connected to the second reflective surface to the apex portion, and the second base portion to the vertex portion spaced a second distance L2, the flat unit is located between the second base and first base, first base and the second base portion spaced a distance S, and satisfies the following relationship:

Figure CN102455458BD00041

[0009] 为达到上述目的,本发明提供一种背光模块,其包括至少一光源及一导光装置,该光源用以投射一第一光学路径以及一第二光学路径,该导光装置用以接收该第一光学路径与该第二光学路径;其中,该导光装置包括一本体及多个微结构部,该本体具有折射率Π,且包括一出光面、一基础面及至少一入光面,该入光面位于该出光面的一侧,该基础面与该出光面相对应,且该基础面与该出光面相距一厚度T ;这些微结构部位于该基础面上,每一微结构部还包括相距一宽度P的一第一基部与一第二基部、一顶点部、一第一反射面、一第二反射面及一平坦单元;其中,该第一反射面连接该第一基部与该顶点部,且该第一基部与该顶点部相距一第一距离L1,该第二反射面连接该第二基部与该顶点部,且该第二基部与该顶点部相距一第二距离L2,该平坦单元位于该 [0009] To achieve the above object, the present invention provides a backlight module, which includes at least one light source and a light guide device, the light source for projecting a first optical path and a second optical path, light guiding means for receiving the first optical path and the second optical path; wherein the light guiding means comprises a body portion and a plurality of microstructures, which has a refractive index [pi body, and comprising a surface, a base surface and at least a light incident surface, the light incident surface located at the side of the surface of the base surface corresponding to the light emitting surface and the base surface and the light emitting surface spaced a thickness T; microstructures of the base face portion is located, each microstructure further comprising a first portion away from a base portion and a second width P of the base portion, an apex portion, a first reflecting surface, a reflection surface and a second planar cell; wherein the first base portion connected to the first reflective surface and the apex portion, and the first base portion to the vertex portion spaced a first distance L1, the second base portion connected to the second reflective surface to the apex portion, the base portion and the second portion spaced a second distance from the vertex L2, the flat unit is located 第二基部与第一基部之间,该第二基部与第一基部相距一间距S,并且满足下列公式: Between the second base and first base, first base and the second base portion spaced a distance S, and satisfies the following formula:

[0010] [0010]

Figure CN102455458BD00051

[0011] 由此,该第一光学路径行进至该平坦单元全反射在该本体中,该第二光学路径经过该多个微结构部反射至该出光面。 [0011] Thus, the first optical path to the travel unit is totally reflected by the flat body, the second optical path through the plurality of the microstructures to the surface of the reflector.

[0012] 如上所述的导光装置,其中,该多个微结构部是位于该基础面上的凸状结构或凹状结构。 [0012] The light guiding device as described above, wherein the plurality of microstructures of the base face portion is located on the convex structure or a concave structure.

[0013] 如上所述的导光装置,其中,该导光装置之关系式还包含:4.5 < n*T/S < 46。 [0013] The light guiding device as described above, wherein the light guiding means of the relationship further comprises: 4.5 <n * T / S <46.

[0014] 如上所述的导光装置,其中,该微结构部的第一距离L1与第二距离L2的长度不相 [0014] The light guiding device as described above, wherein the first portion of the microstructure from the L1 and the second distance L2 phase length

坐寸ο Sit inch ο

[0015] 如上所述的导光装置,其中,该第一反射面或该第二反射面的截面呈一直线、一双曲线、一椭圆曲线或者一抛物线。 [0015] The light guiding device as described above, wherein the cross-sectional surface of the first reflection or the second reflection surface of a straight line, a hyperbola, an ellipse, or a parabolic curve.

[0016] 由此,本发明实施例所述的导光装置及其使用的背光模块会具有最佳的光学均匀度,其光线的均匀化效果较佳,不会产生明暗相间的“暗带现象”。 [0016] Accordingly, the light guide means in the embodiment of the present invention and using a backlight module having the best optical uniformity, homogeneously preferred light effect, no light and dark "dark bands phenomenon . "

附图说明 BRIEF DESCRIPTION

[0017]图1A是本发明实施例1提供的的背光模块与其光学路径示意图; [0017] FIG 1A is a schematic view of one embodiment of a backlight provided in the optical path of the module and its embodiment according to the present invention;

[0018] 图1B是图1A的导光装置的光学效果图; [0018] FIG. 1B is an optical effect of the light guide of Figure 1A;

[0019] 图1C是不同结构尺寸的导光装置的光学效果图; [0019] FIG 1C is an optical effect of different structural dimensions of the light guide means;

[0020] 图1D是G的范围位于0.47〜4.8时,针对η = 1.53,H/P = 0.5的参数组合示意图; [0020] FIG. 1D is a range of 0.47~4.8 when G is located, for η = 1.53, H / P = 0.5 schematic combination of parameters;

[0021] 图1E是G的范围位于0.47〜4.8时,针对T = 2mm, Η/P = 0.5的参数组合示意图; [0021] FIG. 1E is located in a range of 0.47~4.8 G for T = 2mm, Η / P = 0.5 schematic parameter combination;

[0022] 图1F是G的范围位于0.47〜4.8时,针对T = 2mm, η = 1.53的参数组合示意图; [0022] FIG. 1F is located in a range of 0.47~4.8 G for T = 2mm, η = 1.53 parameter combinations schematic;

[0023] 图2是本发明实施例2提供的的背光模块示意图; [0023] FIG. 2 is a schematic diagram of the backlight module 2 provides embodiments of the present invention;

[0024] 图3是本发明实施例3提供的的背光模块示意图; [0024] FIG. 3 is a schematic diagram of the embodiment 3 provides a backlight module according to the present invention;

[0025] 图4是本发明实施例4提供的的微结构部示意图; [0025] FIG. 4 is a schematic view of the microstructure portion provided in Example 4 of the present invention;

[0026] 图5是本发明实施例5提供的的微结构部示意图; [0026] FIG. 5 is a schematic view of the microstructure portion provided in Example 5 of the present invention;

[0027] 图6是本发明实施例6提供的的导光装置示意图; [0027] FIG. 6 is a schematic view of a light guiding apparatus 6 provided in the embodiment of the present invention;

[0028] 图7是本发明实施例7提供的的导光装置示意图。 [0028] FIG. 7 is a schematic diagram of the light guide 7 provided in the apparatus embodiment of the present invention. [0029] 附图中,各标号所代表的组件列表如下: [0029] In the drawings, reference numeral represents a listing of each component are as follows:

[0030] 1、2、3:背光模块,11、21、31:灯罩,12、22、32:光源,13、23、33、43、53、63、73:导光装置,13A:出光面,13B:入光面,13C、33C:基础面,131、631、731:本体,132、232、332、432、632,732:微结构部,1321:第一基部,1322:第二基部,1323:顶点部,1324、4324、5324:第一反射面,1325、4325、5325:第二反射面,133,233:平坦单元; [0030] 1,2,3: a backlight module, 11, 21: Lens, 12, 22: light source, 13,23,33,43,53,63,73: light guide means,. 13A: the surface , 13B: light incident surface, 13C, 33C: base face, 131,631,731: a body, 132,232,332,432,632,732: microstructure unit 1321: first base, 1322: a second base portion, 1323: vertex, 1324,4324,5324: a first reflecting surface, 1325,4325,5325: a second reflection surface, 133, 233: flat unit;

[0031] Θ:夹角,T:厚度,P:宽度,H:深度,S:间距,L1:第一距离,L2:第二距离,I1:第一光学路径,I2:第二光学路径。 [0031] Θ: angle, T: thickness, P: the width, H: depth, S: distance, L1: a first distance, L2: second distance, I1: a first optical path, I2: second optical path.

具体实施方式 detailed description

[0032] 为使本发明的目的、技术方案和优点更加清楚,下面将结合附图对本发明实施方式作进一步地详细描述。 [0032] To make the objectives, technical solutions and advantages of the invention more clearly, following with reference embodiment of the present invention will be described in embodiments in further detail.

[0033] 请参阅图1A,图1A是本发明实施例1提供的背光模块与其光学路径示意图。 [0033] Please refer to FIG. 1A, FIG. 1A is a schematic view of an embodiment of the present invention provides a backlight module and an optical path. 如图1A所不,一背光模块I包括一光源12、一灯罩11及一导光装置13。 Not shown in FIG. 1A, a backlight module 12 comprises I, a lampshade and a light guide means 11 a light source 13. 光源12与灯罩11均设置在导光装置13的左边外侧,光源12用以发射出光线,灯罩11与光源12相邻,用以反射光源12所射出的光线,使光线由导光装置13的左侧边进入导光装置13的内部。 The light source 12 and the globe 11 are disposed on the left outside of the light guide 13, the light source 12 to emit light, the light source 12 and shade 11 adjacent to the light emitted from the reflected light source 12, so that the light from the light guide means 13 entering the left side of the light guide means 13 inside. 导光装置13包括一本体131、多个平坦单元133及多个微结构部132 ;本体131具有折射率n,且包括一出光面13A、一基础面13C及一入光面13B ;这些微结构部132是位于基础面13C上的凸状结构,如图1A的放大图所示,每一微结构部132包括一第一基部1321、一第二基部1322、一顶点部1323、一第一反射面1324及一第二反射面1325。 The light guide device 13 includes a body 131, a plurality of flat unit 133 and a plurality of microstructures 132; the body 131 has a refractive index n, and comprising a surface. 13A, a base face a light incident surface 13B, and 13C; microstructures portion 132 is a convex structure on the surface of the base. 13C, as shown in an enlarged view in FIG. 1A, each portion 132 includes microstructures 1322, 1323, reflecting a first portion of a vertex of a first base portion 1321, a second base portion surface 1324 and a second reflective surface 1325. 其中,导光装置13的材质可为聚乙烯对苯二甲酸酯(Polyethylene Terephthalate, PET)、聚碳酸酯(Polycarbonate, PC)、三醋酸纤维素(Tr1-acetyl Cellulose, TAC)、聚甲基丙烯酸甲酯(Polymethylmethacrylate,PMMA)、甲基丙烯酸甲酯-苯乙烯共聚物(Methylmethacrylatestyrene)、聚苯乙烯(Polystyrene, PS)或环烯共聚物(Cyclic Olefin Copolymer, C0C),或者至少两种以上所述材质所组成。 Wherein the material of the light guide device 13 may be a polyethylene terephthalate (Polyethylene Terephthalate, PET), polycarbonate (Polycarbonate, PC), cellulose triacetate (Tr1-acetyl Cellulose, TAC), polymethylmethacrylate acrylate (Polymethylmethacrylate, PMMA), methyl methacrylate - styrene copolymer (Methylmethacrylatestyrene), polystyrene (polystyrene, PS) or cycloolefin copolymer (cyclic Olefin copolymer, C0C), or at least two or more of the composed of said material. 出光面13A位于导光装置13的上面,入光面13B位于导光装置13的左边,基础面13C位于导光装置13的下面,因此入光面13B在出光面13A的左侧,基础面13C与出光面13A相对应。 The surface 13A is located above the light guide means 13, the left side surface 13B, the base face 13 of the light guide means 13C is positioned beneath the light guide device 13, so that the light incident surface 13B of the left side surface 13A, a base face 13C 13A corresponds to the light receiving surface. 基础面13C与出光面13A相距一厚度T。 A base face 13C and 13A away from a surface thickness T. 这些微结构部132位于基础面13C上,第一基部1321与第二基部1322的距离为宽度P。 These micro structure portion 132 positioned on the base surface 13C, a first distance from the second base portion 1321 and base portion 1322 a width P. 第一反射面1324连接第一基部1321与顶点部1323,且第一基部1321与顶点部1323相距一第一距离L1 ;第二反射面1325连接第二基部1322与顶点部1323,且第二基部1322与顶点部1323相距一第二距离L2。 The first reflective surface 1324 connected to a first base portion and the apex portion 1321 1323, 1321 and the first base portion and the apex portion spaced a first distance Ll 1323; second reflection surface 1325 of the base 1322 connected to the second apex portion 1323, and the second base portion 1322 and 1323 away from the apex portion a second distance L2. 平坦单元133位于第二基部1322与第一基部1321之间,其截面的距离为间距S,也就是说,平坦单元133为两相邻微结构部132之间的水平区域。 Flat unit 133 is positioned between the first base and the second base 1322 1321, a distance section of a pitch S, that is, flat section 133 of the microstructure two adjacent horizontal portions 132 between the region. 在本实施例中,每一微结构部132的大小、形状均相同,每一平坦单元133的间距S也相等。 In the present embodiment, each portion 132 of the microstructure size, shape are the same, each flat cell pitch S 133 are equal.

[0034] 如图1A所示,光源12所射出的光线,其行径包括第一光学路径I1及第二光学路径12,导光装置13接收光线的第一光学路径I1与第二光学路径I2后,第一光学路径I1会行进至多个平坦单元133而被全反射至本体131中;第二光学路径I2会行进至多个微结构部132而被反射至出光面13A。 After [0034], light emitted from the light source 12, which acts comprising a first optical path I1 and the second optical path 12, a first light receiving optical path of the light guide means 13 and the second optical path I2 I1 shown in FIG. 1A , the first optical path I1 will travel to a plurality of flat unit 133 is totally reflected to the body 131; and a second optical path I2 will travel to the plurality of microstructures portion 132 is reflected to the light emitting surface 13A. 也就是说,第一光学路径I1与第二光学路径I2分别利用平坦单元133与微结构部132的反射后,再经由出光面13A射出导光装置13。 That is, after the first optical path I1 and I2, respectively, the second optical path using the reflection means 133 and the flat portion 132 of the microstructure, and then through the emitting surface 13A of the light guide means 13.

[0035] 在优选实施例中,光源12可为冷阴极突光灯管(Cold cathode fluorescentlamp, CCFL)或发光二极管灯管(Light emitting diode, LED)。 [0035] In this embodiment, projections 12 may be a cold cathode tube light source (Cold cathode fluorescentlamp, CCFL) or light emitting diode lamp (Light emitting diode, LED) in the preferred embodiment. 在其他实施例中,光源12及灯罩11还可根据需求分别在导光装置13的左右两外侧边各设置一个。 In other embodiments, the light source 12 and a globe 11 may be provided according to the needs of both outer right and left sides of the light guide means 13, respectively. 如此,该导光装置的左右两侧边均为入光面,且两光源所射出的光线即可分别自该导光装置的左右两侧边进入该导光装置的内部。 Thus, the left and right side edges of the guide means are light incident surface, and the two light rays emitted respectively from the side to the right and left sides of the light guiding means into the interior of the light guide means.

[0036] 针对此一结构,本发明发明人针对导光装置13的结构进行了光学效果的实验。 [0036] For this structure, the present inventors conducted experiments with respect to the structure of the optical effect of the light guide device 13. 请参阅图1B,图1B是图1A的导光装置的光学效益图。 Please refer to FIGS. 1B, FIG. 1B is an optical efficiency of the light guide device of FIG. 1A. 其中,横轴是相对于该导光装置13的不同水平位置,纵轴则为这些不同位置的相对亮度,且,该相对亮度=平均亮度/最大亮度。 Wherein, the horizontal axis is the relative light guiding means 13 different from the horizontal position and the vertical axis compared with these different positions relative luminance and the relative luminance = average luminance / maximum luminance. 如图1B所示,导光装置13的相对亮度与微结构部132的设置有关,在微结构部132处,该相对亮度值呈现出峰值(peak)。 1B, the relative luminance of the light guide device 13 is provided with a portion 132 of the relevant microstructure, the microstructure at the portion 132, the relative luminance with a peak value (peak). 若该峰值与平均值差异过大,便会造成“暗带现象”。 If the peak and the average difference is too large, it will result in "dark band phenomenon."

[0037] 为了改善传统液晶显示器的“暗带现象”,提升其显示影像的质量,本发明发明人针对导光装置13在不同厚度T、不同折射率η、不同间距S的前提下,作了相对亮度的实验。 [0037] In order to improve the conventional liquid crystal display of "dark band phenomenon", which enhance the display quality of an image, the present invention 13 in different thicknesses T, η different refractive indices for light guiding means, under the premise of different pitches S, were experimental relative luminance. 请参阅图1C,图1C是不同结构尺寸的导光装置的光学效果图。 Please refer to FIG. 1C, FIG 1C is an optical effect of the light guide means different structural dimensions. 如图1C所示,不论厚度Τ、折射率η的大小为何,随着微结构部132的间距S逐渐减小,其相对亮度也逐渐提高。 1C, regardless of the thickness Τ, the refractive index η why the size, spacing S as the microstructure portion 132 gradually decreases, the relative luminance is gradually increased. 也就是说,当微结构部132的间距S越小,代表导光装置13可设置越多的微结构部132,即微结构部132的密度越高,则其液晶显示器的“暗带现象”也越不明显。 That is, when the microstructure of the smaller portion 132 of the spacing S, the light guide 13 can be provided on behalf of the more microstructured portion 132, i.e., the higher the density of the micro-structure portion 132, which is a liquid crystal display "dark band phenomenon" the more obvious. 根据经验,当该相对亮度达到0.4以上,人们即无法由肉眼分辨出明暗相间的条纹,也就不再出现“暗带现象”。 According to experience, when the relative luminance of 0.4 or more, i.e., it can not be distinguished by the naked eye the light and dark stripes, no longer a "dark bands phenomenon."

[0038] 因此,为了求得相对亮度与厚度Τ、间距S、折射率η的数学关系,本发明的发明人经过多次的实验,发现厚度Τ、间距S、折射率η可以组合成一无因次参数U,用来作为该导光装置的特征尺寸;其中: [0038] Accordingly, in order to obtain the relative luminance Τ thickness, spacing, refractive index η mathematical relation S, the inventors of the present invention after several experiments, was found Τ thickness, spacing S, the refractive index η can be combined into a no result pARAMETRIC U, is used as the feature size of the light guide means; wherein:

[0039] U = n*T/S ; [0039] U = n * T / S;

[0040] 在此,该参数U的单位为无因次。 [0040] Here, the parameter U is the unit is dimensionless. 因为参数U为厚度T、间距S与折射率η的函数,所以通过不同大小的厚度Τ、间距S,即可测得不同材质的参数U的数值。 Because the parameter U is the thickness T, the refractive index η spacing function S, so that the thickness Τ different sizes, spacing S, U can be measured parameter values ​​of different materials. 经过实验,发现该无因次参数U的范围介于4.5〜46时,导光装置13会具有较佳的均匀化效果。 After the experiment, when the dimensionless parameter ranging 4.5~46 U is found, the light guide means 13 may have a preferred effect uniform. 即: which is:

[0041] 4.5<n*T/S<46 (I) [0041] 4.5 <n * T / S <46 (I)

[0042] 此外,除了导光装置13的结构之外,微结构部132的外观、轮廓也是影响出光效果的重要因素。 [0042] Further, in addition to the structure of the light guide means 13, the appearance of the microstructure of the portion 132, an outline of the important factors also affect the light effect. 因此,除了该无因次参数U之外,该微结构部132的深宽比的范围也会影响出光效果;如图1A的放大图所示,该深宽比为H/P,深度H为微结构部132在垂直方向上的距离。 Thus, in addition to the U dimensionless parameter outside the range of the microstructure 132 will also affect the aspect ratio of the light effect; enlarged as shown in FIG. 1A, the aspect ratio H / P, depth H distance microstructure portion 132 in a vertical direction. 根据经验,微结构部132的深宽比应介于0.05〜0.5之间。 According to experience, the aspect ratio of the microstructure portion 132 should be between 0.05~0.5. 即: which is:

[0043] 0.05 < Η/P < 0.5 (2) [0043] 0.05 <Η / P <0.5 (2)

[0044] 为了将微结构部132的尺寸效应与间距S的效应结合,在此特将上述的公式(I)与公式(2)结合,其推导如下: [0044] In order to effect the microstructure portion 132 in conjunction with the size of the effect of distance S is, in this Patent the above-mentioned formula (I) and formula (2) binding, which is derived as follows:

[0045] 公式(I)*公式⑵; [0045] Formula (I) * ⑵ formula;

[0046] — 4.5*0.05 < (n*T/S) * (H/P) < 46*0.5 ; [0046] - 4.5 * 0.05 <(n * T / S) * (H / P) <46 * 0.5;

[0047] [0047]

Figure CN102455458BD00071

(3) (3)

[0048] 其中,θ为第一反射面1324与基础面13C的夹角。 [0048] where, θ is the angle between the plane surface 13C of the base 1324 and the first reflector. 另外,因为P、U、L2合围成三角形,所以 Further, since the P, U, L2 encirclement triangular, so

Figure CN102455458BD00072

[0049] [0049]

Figure CN102455458BD00073

[0050] [0050]

Figure CN102455458BD00081

[0051] 将公式(4)代入公式(3): [0051] Equation (4) into Equation (3):

[0052] [0052]

Figure CN102455458BD00082

[0053] 将公式(5)开根号: [0053] Equation (5) open root:

[0054] [0054]

Figure CN102455458BD00083

[0055] 其中,微结构部132的第一距离L1与第二距离L2之长度可为不相等。 [0055] wherein the first distance L1 microstructures 132 may not equal to the length of the second distance L2.

[0056] 由上述推导可知,若满足上述公式(6)的关系式,即可使背光模块I的出光效果较为均匀,导光装置13的“暗带现象”便不复存在。 [0056] From the above derivation, if satisfying the above formula (6) in relation, to the effect that the light of a backlight module I is more uniform, the light guide means "dark band phenomenon" 13 ceased to exist. 由此,通过公式¢)的定义,即可求得导光装置13及其使用的背光模块I的均匀化范围,从而使生产制造的厂商设计出优化的导光装置13及背光模块1,无需担心明暗相间的“暗带现象”。 Thus, by the formula ¢) is defined, to obtain a uniform range of the backlight module 13 and the light guide means using the I, so that manufacturers design optimization of manufacturing the light guide means 13 and a backlight module 1, without worry about light and dark "dark band phenomenon."

[0057] 上述公式(6)的折射率η、厚度T、间距S、宽度P、第一距离1^、第二距离L2,可接着定义一均匀化指标G: [0057] The refractive index of the equation (6), [eta], the thickness T, the pitch S, the width P, ^ 1 a first distance, the second distance L2, may then define a uniform index G:

[0058] [0058]

Figure CN102455458BD00084

[0059] 因此,当均匀化指标G的范围位于0.47〜4.8时,导光装置13便不会产生“暗带现象”。 [0059] Thus, even when located in a range of 0.47~4.8 index G, the light guide 13 will not produce a "dark banding phenomenon."

[0060] 为了方便本领域技术人员明确地知道G的各种参数的组合,在此还进一步以图表方式列出该均匀化指标G的范围位于0.47〜4.8时,其G值与间距S的关系。 [0060] For convenience the skilled person know exactly G of the combination of the various parameters in this yet further embodiment are listed in a chart of the range index G homogenized located 0.47~4.8, the G value and its relationship to the spacing S . 请参阅图1D,图1D是G的范围位于0.47〜4.8时,针对η = 1.53,H/P = 0.5的参数组合示意图。 Please refer to FIG. 1D, FIG. 1D is a range of 0.47~4.8 when G is located, for η = 1.53, a schematic view of a combination parameter of 0.5 H / P =. 如图1D所示,当该导光装置13的厚度T越大,其均匀化指标G也越高。 1D, when the thickness T of the light guiding means 13 is larger, uniformly higher G indicators. 此外,在同一厚度T的状况下,当该间距S越小,其均匀化指标G也会越高。 Further, in the case of the same thickness T, when the spacing is smaller S, G uniformly indicators will be higher. 均匀化指标G越高即代表该导光装置13的均匀化的效果越好,越不会产生“暗带现象”。 The higher the index homogenizing light guide G which represents better the effect of uniformizing means 13, will not produce the "dark bands phenomenon." 由本图可得知,当导光装置13的厚度T为Imm时,G值大约为1.1〜2.9 ;厚度T为2mm时,G值大约为1.5〜3.9 ;厚度T为3mm时,G值大约为2〜4.8。 Can be seen from the figure, when the thickness T of the light guide device 13 when Imm, G value is about 1.1~2.9; T is a thickness of 2mm, G value is about 1.5~3.9; T is the thickness 3mm, G value is about 2~4.8.

[0061] 请参阅图1E,图1E是G的范围位于0.47〜4.8时,针对T = 2mm, H/P = 0.5的参数组合示意图。 [0061] Referring to FIG. 1E, FIG. 1E is a range of 0.47~4.8 when G is located, for T = 2mm, H / P = 0.5 schematic parameter combination. 如图1E所示,当导光装置13使用不同的材质时,其不同的折射率η所造成的均匀化指标G差异并不大。 Uniform index difference G, when using different material 13 of the light guide means, which in FIG. 1E different refractive indices η caused is not large. 与图1D的趋势相同,当间距S越小,其均匀化指标G也会越高。 1D is the same trend, when the smaller spacing S, G uniformly indicators will be higher. 由本图可得知,无论哪一种材质的导光装置13,其G值大约为1.5〜3.9。 Can be seen from this figure, no matter what kind of material of the light guide device 13, the G value which is about 1.5~3.9.

[0062] 请参阅图1F,图1F是G的范围位于0.47〜4.8时,针对T = 2mm, η = 1.53的参数组合示意图。 [0062] Referring to FIG. 1F, FIG. 1F is a range of 0.47~4.8 when G is located, for T = 2mm, η = 1.53 schematic parameter combinations. 如图1F所示,当导光装置13的深宽比越大,Η/P的值就越大,其均匀化指标G也越高。 FIG. 1F, when the value Η / P, the greater the aspect ratio of the light guide means 13 is larger, uniformly higher G indicators. 还有,当间距S越小,其均匀化指标G也会越高。 Also, when the pitch is smaller S, G uniformly indicators will be higher. 当导光装置13的深宽比H/P为0.05时,其G值大约为0.5〜1.2 ;当导光装置13的深宽比Η/P为0.25时,其G值大约为1.1〜2.8 ;当导光装置13的深宽比Η/P为0.50时,其G值大约为1.6〜4;当导光装置13的深宽比Η/P为0.75时,其G值大约为2〜4.8。 When the light guide 13 is the aspect ratio H / P is 0.05, which value is about 0.5~1.2 G; light guide 13 when the aspect ratio of Η / P is 0.25, which value is about 1.1~2.8 G; when the light guide 13 is the aspect ratio Η / P is 0.50, which value is about 1.6~4 G; light guide 13 when the aspect ratio of Η / P is 0.75, which value is about 2~4.8 G. [0063]当然,本发明还有其他实施例。 [0063] Of course, other embodiments of the present invention. 请参阅图2,图2是本发明实施例2的背光模块示意图。 Please refer to FIG. 2, FIG. 2 is a schematic diagram of the backlight module 2 of the embodiment of the present invention. 如图2所不,背光模块2包括一光源22、一灯罩21及一导光装置23。 2 are not shown in FIG, 2 includes a backlight module 22, a lampshade and a light guide means 21 a light source 23. 其中,相似的结构不再赘述。 Wherein the similar structure is omitted. 背光模块2的多个微结构部232,其截面为相同形状、相同尺寸的等腰钝角三角形。 A plurality of microstructures portions 232 of the backlight module, which cross-section the same shape, the same size obtuse isosceles triangle. 两相邻微结构部232之间的平坦单元233,其截面的间距S并不相等;如图2所示,多个平坦单元233的间距S越往右边其值越小。 Between flat unit 232,233, the section spacing, S, of adjacent microstructures not equal two portions; shown, a plurality of flat cells 233, the more the smaller the spacing S the value to the right in FIG. 2. 因为,在靠近光源22处,该光线(未绘示)的密度较高,需要通过较大面积的平坦单元233来反射光线,使光线能够传递至导光装置23的右边;如此,射出导光装置23的光线能量才会均匀。 Because, near the light source 22, the higher the light (not shown) has a density, need a larger area planar light reflecting unit 233, so that light can be transmitted to the right side 23 of the light guide means; thus, the light emitted from the guide light energy device 23 will be uniform. [0064] 请参阅图3,图3是本发明实施例3的背光模块示意图。 [0064] Please refer to FIG. 3, FIG. 3 is a schematic view of a backlight module according to embodiment 3 of the present invention. 如图3所示,背光模块3包括一光源32、一灯罩31及一导光装置33。 3, the backlight module 32 comprises a 3, a lampshade and a light guide means 31 a light source 33. 其中,背光模块3的多个微结构部332是位于基础面33C上的凹状结构,这些微结构部332也可用来反射光线,使导光装置33内部的光线(本图未绘示)均匀地传递至右方。 Wherein the plurality of microstructures portions of the backlight module 3 332 is located on the base face 33C of the concave structure, the microstructures 332 may also be used to reflect light so that the light inside 33 of the light guide means (in this figure not shown) uniformly delivered to the right. [0065] 请参阅图4,图4是本发明实施例4的微结构部示意图。 [0065] Please refer to FIG. 4, FIG. 4 is a schematic view of the microstructure portion of the embodiment 4 of the present invention. 如图4所示,导光装置43的第一反射面4324为一平面,因此第一反射面4324的截面呈一直线。 A first reflecting surface, the light guide means 4324 in FIG. 4 is a plane 43, so the section of the first reflection surface 4324 a straight line. 导光装置43的第二反射面4325为一略向下凸出的曲面,因此第二反射面4325的截面可呈现为双曲线、椭圆曲线或者抛物线。 The second reflective surface 4325 of the light guide device 43 is a slightly convex downwardly curved section of the second reflecting surface 4325 and therefore may be presented as hyperbolic, parabolic or elliptic curve. 由此,导光装置43可通过微结构部432不同轮廓的第一反射面4324与第二反射面4325,使反射的光线达到更好的导光效果。 Accordingly, the light guide device 43 and the second reflective surface 4324 may be 4325, reflected by the first reflective surface 432 a different profile of the microstructure portion of the light guide light rays to achieve a better effect. [0066] 请参阅图5,图5是本发明实施例5的微结构部示意图。 [0066] Referring to FIG. 5, FIG. 5 is a schematic view of the microstructure portion of the embodiment of Example 5 of the present invention. 如图5所示,导光装置53的第一反射面5324为一略向上凹入的曲面,第二反射面5325为一略向下凸出的曲面。 5, the light guide means 53 of a first reflecting surface 5324 is a slightly upwardly concave curved surface, a second reflective surface 5325 is slightly convex downwardly curved surface. 由此,本实施例也可达到前述功效。 Thus, the present embodiment can also achieve the effect. [0067] 请参阅图6,图6是本发明实施例6的导光装置示意图。 [0067] Referring to FIG. 6, FIG. 6 is a schematic view of a light guide device of embodiment 6 of the present invention. 如图6所示,该导光装置63上包括多个微结构部632,这些微结构部632呈三角菱镜柱状,且分别分布在本体631的不同高度上。 6, portions 632 includes a plurality of microstructures, the microstructures having a triangular prism portion 632 on the columnar light guide unit 63, and are distributed at different heights of the body 631. 在优选实施例中,这些微结构部632以周期高低起伏的方式分布设置。 In a preferred embodiment, the microstructures 632 in a cycle of undulating distributed setting. [0068] 请参阅图7,图7是本发明实施例7的导光装置示意图。 [0068] Referring to FIG. 7, FIG. 7 is a diagram illustrating a light guide means of the embodiment 7 of the present embodiment of the invention. 如图7所示,导光装置73上包括多个微结构部732,这些微结构部732水平地分布在本体731的同一高度上,且每一微结构部732均呈反复弯延的弧状。 As shown in FIG 7, the light guide 73 comprises a plurality of microstructures 732, 732 microstructures distributed horizontally at the same height of the main body 731, and each microstructure showed repeatedly bent portion 732 extending in an arc. [0069] 综上所述,本发明实施例的导光装置及其使用的背光模块,可通过将该导光装置与该微结构部的尺寸特征无因次化,而求得不同尺寸结构的光学功效。 [0069] In summary, embodiments of the light guide of the present invention and the apparatus used in a backlight module, the light guide by means of dimensionless characteristics and dimensions of the portion of the microstructure and to calculate the various dimensions of the structure optical effect. 如前所述,不论是哪一种实施例,当该导光装置与该微结构部的尺寸特征符合公式(6)的范围时,该导光装置便具有最佳的光学均匀度,其光线的均匀化效果较佳,不会产生明暗相间的“暗带现象”。 As described above, no matter what kind of embodiment, when the light guide means and the dimensional characteristics of the microstructure consistent with the scope portion of the equation (6), the light guide will have the best uniformity of intensity, light rays which preferably homogenization effect, no light and dark "dark bands phenomenon." [0070] 以上所述仅为本发明的较佳实施例,并不用以限制本发明,凡在本发明的精神和原则之内,所作的任何修改、等同替换、改进等,均应包含在本发明的保护范围之内。 [0070] The foregoing is only preferred embodiments of the present invention, not intended to limit the present invention within the spirit and principle of the present invention, any modification, equivalent replacement, or improvement, it should be included in the present within the scope of the invention.

Claims (8)

  1. 1.一种导光装置,其特征在于,包含: 一本体,该本体具有折射率n,且包括一出光面、一基础面及至少一入光面,该入光面位于该出光面的一侧,该基础面与该出光面相对应,且该基础面与该出光面相距一厚度T ;多个微结构部,这些微结构部位于该基础面上,每一微结构部还包括: 相距一宽度P的一第一基部与一第二基部; 一顶点部; 一第一反射面,连接该第一基部与该顶点部,且该第一基部与该顶点部相距一第一距离L1 ; 一第二反射面,连接该第二基部与该顶点部,且该第二基部与该顶点部相距一第二距离L2 ; 一平坦单元,位于一个微结构中的第二基部与相邻微结构的第一基部之间,该第二基部与第一基部相距一间距S,满足关系式如下: 1. A light guide apparatus, wherein, comprising: a body that has a refractive index n, and comprising a surface, a base surface and at least a light incident surface, the light incident surface of the light emitting surface is located at a side, the base surface and the light exit surface corresponding to, and out of the base surface and the distance of a surface thickness T; portions plurality of microstructures, the microstructures of the base face portion is located, each microstructured section further comprises: a distance a first base and a second width P of the base portion; an apex portion; a first reflective surface, connecting the first vertex to the base portion, and the first base portion and the apex portion a first distance L1 apart; a a second reflecting surface, is connected to the apex of the second base portion, and the second base portion to the vertex portion spaced a second distance L2 of; a flat unit in a second base microstructures adjacent microstructures between the first base, the first base and second base portion spaced by a distance S, satisfies the following relationship:
    Figure CN102455458BC00021
  2. 2.根据权利要求1所述的导光装置,其特征在于,该多个微结构部是位于该基础面上的凸状结构或凹状结构。 2. The light guide device according to claim 1, wherein the plurality of microstructures of the base face portion is located on the convex structure or a concave structure.
  3. 3.根据权利要求1所述的导光装置,其特征在于,该导光装置之关系式还包含:4.5< n*T/S < 46。 3. The light guide according to claim 1, characterized in that the relationship of the light guiding means further comprises: 4.5 <n * T / S <46.
  4. 4.根据权利要求1所述的导光装置,其特征在于,该微结构部的第一距离L1与第二距离匕的长度不相等。 4. The light guide according to claim 1, characterized in that, dagger Ll second distance from the length of the first portion of the microstructure are not equal.
  5. 5.根据权利要求1所述的导光装置,其特征在于,该第一反射面或该第二反射面的截面呈一直线、一双曲线、一椭圆曲线或者一抛物线。 The light guide according to claim 1, wherein the first reflecting surface or the cross section of the second reflecting surface in a straight line, a hyperbola, an ellipse, or a parabolic curve.
  6. 6.一种背光模块,其特征在于,包含: 至少一光源,用以投射一第一光学路径以及一第二光学路径; 一导光装置,用以接收该第一光学路径与该第二光学路径,该导光装置还包括: 一本体,该本体具有折射率n,且包括一出光面、一基础面及至少一入光面,该入光面位于该出光面的一侧,该基础面与该出光面相对应,且该基础面与该出光面相距一厚度T ;多个微结构部,这些微结构部位于该基础面上,每一微结构部还包括: 相距一宽度P的一第一基部与一第二基部; 一顶点部; 一第一反射面,连接该第一基部与该顶点部,且该第一基部与该顶点部相距一第一距离L1 ; 一第二反射面,连接该第二基部与该顶点部,且该第二基部与该顶点部相距一第二距离L2 ; 一平坦单元,位于一个微结构中的第二基部与相邻微结构的第一基部之间,该第二基部与第一基 A backlight module comprising: at least one light source for projecting a first optical path and a second optical path; a light guide means for receiving the first optical path and the second optical path, the light guiding means further comprises: a body, the body having a refractive index n, and comprising a surface, a base surface and at least a light incident surface, an incident surface located at the side surface of the base surface corresponding to the light emitting surface and the base surface and the light emitting surface spaced a thickness T; portions plurality of microstructures, the microstructures of the base face portion is located, each microstructured section further comprising: a distance of a first width P a base portion and a second base portion; an apex portion; a first reflective surface, connecting the first vertex to the base portion, and the first base portion to the vertex portion spaced a first distance Ll; a second reflective surface, connecting the second vertex to the base portion, and the second base portion to the vertex portion spaced a second distance L2 of; means a flat, between the first base and the second base portion is located adjacent microstructures of a microstructured the first base and second base 相距一间距S ; 其中,该第一光学路径行进至该平坦单元全反射在该本体中,该第二光学路径经过该多个微结构部反射至该出光面,并满足下列方程式: A spacing distance S; wherein the first optical path to the travel unit is totally reflected in the planar body, the second optical path to the reflective surface through a portion of the plurality of microstructures, and satisfies the following equation:
    Figure CN102455458BC00031
  7. 7.根据权利要求6所述的背光模块,其特征是,该微结构部的第一距离L1与第二距离L2的长度不相等。 The backlight module according to claim 6, characterized in that, L1 L2 and the second distance from the length of the first portion of the microstructure are not equal.
  8. 8.根据权利要求6所述的背光模块,其特征是,该第一反射面或该第二反射面的截面呈一直线、一双曲线、一椭圆曲线或者一抛物线。 8. The backlight module according to claim 6, characterized in that the cross-sectional surface of the first reflection or the second reflection surface of a straight line, a hyperbola, an ellipse, or a parabolic curve.
CN 201010517026 2010-10-19 2010-10-19 The light guide means and the backlight module CN102455458B (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1760724A (en) 2004-10-14 2006-04-19 清华大学 Board for guiding light and backlight module
CN1779518A (en) 2004-11-18 2006-05-31 清华大学 Light-conducting board and backlight mould set
CN101684927A (en) 2008-09-22 2010-03-31 财团法人工业技术研究院 High-collimation face type light source module and light output method thereof

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1760724A (en) 2004-10-14 2006-04-19 清华大学 Board for guiding light and backlight module
CN1779518A (en) 2004-11-18 2006-05-31 清华大学 Light-conducting board and backlight mould set
CN101684927A (en) 2008-09-22 2010-03-31 财团法人工业技术研究院 High-collimation face type light source module and light output method thereof

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