CN101206280A - Light guide board and back light module unit using the same - Google Patents

Light guide board and back light module unit using the same Download PDF

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Publication number
CN101206280A
CN101206280A CN 200710303686 CN200710303686A CN101206280A CN 101206280 A CN101206280 A CN 101206280A CN 200710303686 CN200710303686 CN 200710303686 CN 200710303686 A CN200710303686 A CN 200710303686A CN 101206280 A CN101206280 A CN 101206280A
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light
surface
guide
groove
plate
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CN 200710303686
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Chinese (zh)
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钧 朱
燕 赵
金国藩
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清华大学
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Abstract

A light guide plate and a backlight module using the light guide plate belong to the liquid crystal display (LCD) field, and aims to effectively solve the problem that uniform luminous brightness is not easy to obtain when a LED is used as a backlight source. The invention discloses a light guide plate which comprises a light inlet surface, a light outlet surface opposite to the light inlet surface and a side face connecting the light inlet surface and the light outlet surface, wherein, each of the light inlet surface and the light outlet surface has a groove structure; each groove structure is formed after a rotary body is cut out from the light guide plate; the groove structure of the light inlet surface is called a first groove, while the groove structure of the light outlet surface is called a second groove; the rotary shafts of the first groove and the second groove pass through the centers of the light inlet surface and the light outlet surface of the light guide plate. The invention also discloses a backlight module using the light guide plate. The light outlet surface of the light guide plate has uniform luminous brightness; moreover, the backlight module, which adopts a plurality of combined light guide plates, not only can be used as a small-sized LCD device, but also can be used in a large-sized LCD device.

Description

导光板及使用该导光板的背光模组 The light guide plate and backlight module using the light guide plate

技术领域 FIELD

本发明涉及一种导光板以及使用此导光板的背光模组,属于液晶显示领域。 The present invention relates to a light guide plate and a backlight module using this light guide plate, belonging to the liquid crystal display art. 背景技术 Background technique

随着信息时代的到来,液晶显示器(LCD)的发展突飞猛进,处在平板显示领域的主导地位。 With the advent of the information age, the development of liquid crystal display (LCD) leaps and bounds, in a dominant position in the field of flat panel display. 液晶显示装置具有轻薄、省电、低辐射等优点,随着液晶面板尺寸越做越大、产品规格越来越好,市场范围得以不断扩大。 The liquid crystal display device having a thin, low power consumption, low radiation, etc., as the LCD panel size bigger and bigger, better and better product specifications, scope of the market to continue to expand. 背光模组是液晶显示系统的重要组成部分,其性能直接决定液晶显示器的亮度、颜色、功耗等主要指标。 The backlight module is an important part of a liquid crystal display system, which directly determines the performance of the main indicators of brightness, color, power consumption of the liquid crystal display. 近年来液晶显示装置在功能上及外观上的要求越来越高,对背光模组的性能要求也越高,其中,导光板和光学膜片组是背光模组最主要的技术成本所在。 In recent years, on the liquid crystal display device of claim functions and appearance of increasingly high performance requirements of the backlight module higher, wherein the light guide plate and the optical film set is the most important technical costs of the backlight module is located.

背光模组主要由光源、导光板、反射板、扩散膜、棱镜膜以及偏振膜组成。 The backlight module mainly composed of a light source, a light guide plate, a reflection plate, a diffusion film, a prism film and a polarizing film. 背光模组的光源主要采用侧光式和直下式。 The light source of the backlight module mainly edge type and a direct type. 导光板主要功能是使光束从导光板的出光面均匀出射, 反射板相对该导光板的底面设置,以将从导光板底面出射的光束再次反射入该导光板内, 提高光束的利用率,之后再经过扩散膜片使导光板射出的光线扩散与偏向,最后再经过棱镜膜片,调整光线发散角度,进而提高液晶显示器面板的亮度与均匀性。 The light guide plate main function is to make the uniform light beam emitted from the light exit surface of the light guide plate, a reflection plate disposed opposite the bottom surface of the light guide plate to the bottom surface of the light guide plate from the light beam emitted again reflected into the guide plate, to improve the utilization of the light beam, after diffusion membrane and then through deflection guide plate so that light emitted from the diffuser, and finally through the prism film, to adjust the divergence angle of light, thereby improving uniformity of the luminance of the liquid crystal display panel.

目前在背光模组使用的光源中,主要是冷阴极荧光灯(CCFL),但这种光源具有功耗较高、受温度影响大、驱动电压相对较高、灯玻管易碎及汞污染等问题;而作为光源的发光二极管(LED)则具有低功耗、驱动电压较低、工作性能几乎不受温度影响、长寿命、坚固及无汞污染等长处。 In the light source of the backlight module is currently in use, mainly cold cathode fluorescent lamp (the CCFL), but such a light source having high power consumption, large influence by temperature, the driving voltage is relatively high, the lamp glass tube and the mercury pollution problems frangible ; source of light emitting diodes (LED) is a low power consumption, low driving voltage, less temperature performance, long life, no mercury and sturdy other advantages. 与CCFL背光源相比,LED背光的色彩重现度(ColorReproduction)可以达到National Television System Committee (NTSC)标准的105%。 Compared with the CCFL backlight, LED backlighting of color reproduction (ColorReproduction) can reach the National Television System Committee (NTSC) standard 105%. 而一般CCFL灯管,仅能提供NTSC标准的72%。 The general CCFL lamp, providing only 72% NTSC standard. 因而采用LED背光源,LCD器件色彩更加鲜艳。 Thus LED backlight, LCD device more vivid colors. 然而,与CCFL 背光相比,LED背光更多地用于3.5英寸或更小尺寸的PDA、手机以及类似的装置上。 However, compared to the CCFL backlight, LED backlighting more or less for the 3.5-inch small-sized PDA, mobile phones and similar devices. 而且,发光二极管的出射光具具有一定的发散角度,当其直接射入背光模组的导光板时,使得导光板入光面一侧易出现光学暗区,且与发光二极管相对的位置易出现光柱,不易获得较佳的入光均匀度。 Further, the emitted light with the light emitting diode has a certain divergence angle, which is directly incident on the light guide plate when the backlight module, the light guide plate such that light incident surface side of the optical dark areas prone and prone position opposite to the light emitting diode light beam, the light is not easy to get better uniformity. 现有的背光源技术中,有采用单独的反射器使得LED经过反射器后发出的光是平行光,使用平行光进入导光板,但此结构复杂。 Existing backlight technology, there is employed such that a separate reflector LED light parallel light emitted after reflection, a parallel light enters the light guide plate, but this complex structure.

有鉴于此,有必要提供一种发光亮度均匀,能适用于大小尺寸的基于LED背光源的背光模组。 In view of this, it is necessary to provide a uniform light emission brightness, the sizes can be applied to LED-based backlight backlight module.

发明内容 SUMMARY

本发明的主要目的在于提供一种新的导光板结构以及使用此导光板的背光模组,有效解决使用LED作为背光源不易得到均匀发光亮度的问题。 The main object of the present invention to provide a novel structure of the light guide plate and backlight module using this light guide plate, the LED is used as an effective solution to the problem is difficult to obtain uniform light emission backlight luminance.

本发明提供了一种导光板,包括入光面、与该入光面相对的出光面以及连接所述入光面和出光面的侧面,其特征在于,该导光板的入光面上布有散射结构,所述入光面和出光面上都具有一个凹槽结构,入光面的凹槽结构和出光面的凹槽结构是在导光板上挖去一个旋转体后形成的结构,入光面的凹槽结构称为第一凹槽,出光面的凹槽结构称为第二凹槽, 所述第一凹槽和第二凹槽的旋转轴经过导光板入光面和出光面的中心。 The present invention provides a light guide plate comprising a light incident surface, the surface opposite to the light output surface and the light incident surface side of the connector and the light exit surface, wherein the light incident surface of the light guide plate cloth scattering structure, the incident surface and the light exit surface having a groove structure, the surface of the groove structure and the surface structure of the groove structures are formed after digging a rotating body on the guide plate, the light incident central groove structure is referred to as a first groove surface, the groove structure is referred to as a second groove surface, the first rotation shaft and second grooves into the surface of the light guide plate through the light emitting surface and .

在本发明中,所述第二凹槽的表面还可涂有反射材料。 In the present invention, the surface of the second groove may also be coated with a reflective material.

在本发明中,所述第一凹槽可以是在导光板入光面上挖去一个由长方形、正方形、梯形、三角形、半圆或任意曲线绕经过导光板入光面和出光面的中心的旋转轴旋转而形成的旋转体后形成的。 In the present invention, the first groove may be a rotating guide plate through the light incident surface of the light guide plate into a cut-out and the wound surface of a rectangular, square, trapezoidal, triangular, semicircular or any curved surface of the center axis rotation body is formed after the formation.

在本发明中,所述第二凹槽可以是在导光板出光面上挖去一个由长方形、正方形、梯形、三角形、半圆或任意曲线绕经过导光板入光面和出光面的中心的旋转轴旋转而形成的旋转体后形成的。 In the present invention, the second groove may be cut-out in the surface of the light guide plate through the light guide plate into and out around a surface of a rectangular, square, trapezoidal, triangular, semicircular or any curved surface of the rotating shaft center rotating body is formed after the formation.

本发明还提供了一种背光模组,包括导光板、设在导光板的入光面正下方的光源、与导光板的入光面相对应设置的反射板,以及依次设在导光板出光侧的扩散膜片、棱镜膜片和偏振膜片;其特征在于,所述导光板包括入光面、与该入光面相对的出光面以及连接所述入光面和出光面的侧面,所述入光面上布有散射结构,所述入光面和出光面上都具有一个凹槽结构,入光面的凹槽结构和出光面的凹槽结构是在导光板上挖去一个旋转体后形成的结构,入光面的凹槽结构称为第一凹槽,出光面的凹槽结构称为第二凹槽,所述第一凹槽和第二凹槽的旋转轴经过导光板入光面和出光面的中心。 The present invention also provides a backlight module includes a light guide, a light source into the positive surface disposed below the light guide plate, the reflection plate and the light guide plate corresponding to the light incident surface disposed, and sequentially provided on a light emitting side of the light guide plate diffusion film, a prism film and the polarizing film; characterized in that said light guide comprises a light incident surface, the surface opposite to the light emitting surface and the light incident surface and connected to a side surface of said incident cloth light scattering surface structure, the incident surface and the light exit surface having a groove structure, the surface of the groove structure and the groove structure is formed after the surface of the cut-out a rotating body on the light guide plate structure, the structure is called a first surface of the recess grooves, the groove structure is referred to as a second groove surface, the first rotation shaft and second grooves into the surface of the light guide plate through and the center glossy.

作为本发明的一种改进,所述反射板是直接镀在导光板入光面上的反射膜。 As an improvement of the invention, the reflective plate is a reflecting film deposited directly on the surface of the light guide plate. 作为本发明的一种改进,所述反射板和导光板的入光面间隔一段距离相对设置。 As an improvement of the invention, the reflection plate and the light incident surface of the light guide plate spaced from the opposite. 本发明提出的导光板的出光面发光亮度均匀,出射光区域的形状和导光板出光面的形状相同。 The light guide plate of the present invention proposed a uniform surface emission luminance, the light exiting the light guide plate and a region of the same shape as the shape of the surface. 使用几个导光板的组合的背光模组既可以用作小尺寸的液晶显示装置,也能用在大尺寸的液晶显示装置中。 Some of the light guide plate using the liquid crystal composition of the backlight module can be used both as a small-sized display device can also be used in the liquid crystal display device of large size.

附图说明 BRIEF DESCRIPTION

图l为本发明第一个实施例所述的导光板的剖面示意图。 Figure l a schematic cross-sectional view of the light guide plate according to the embodiment of the present invention. 图2为本发明第二个实施例所述的导光板的剖面示意图。 A schematic cross-sectional view of the light guide plate of the second embodiment of FIG. 2 embodiment of the present invention. 图3为本发明第三个实施例所述的导光板的剖面示意图。 FIG 3 is a schematic cross-sectional view of a third embodiment of the light guide plate of the embodiment of the present invention. 图4为本发明第四个实施例所述的导光板的剖面示意图。 FIG 4 is a schematic cross-sectional view of the light guide plate according to a fourth embodiment of the invention. 图5为本发明第五个实施例所述的导光板的剖面示意图。 A schematic cross-sectional view of a fifth embodiment of the light guide plate of FIG. 5 embodiment of the present invention. 图6为本发明第六个实施例所述的导光板的剖面示意图。 6 is a schematic cross-sectional view of the light guide plate of a sixth embodiment of the present invention. 图7为本发明第七个实施例所述的背光模组的剖面示意图。 Cross-sectional view of the seventh embodiment of the backlight module of FIG. 7 embodiment of the present invention. 图8为本发明第八个实施例所述的背光模组的剖面示意图。 A cross-sectional schematic view of an eighth embodiment of the backlight module according to Example 8 of the present invention FIG.

具体实施方式 detailed description

本发明提供一种导光板,以及使用此导光板的背光模组。 The present invention provides a light guide plate and backlight module using this light guide plate. 导光板主要的用途为导引光线方向,并使导光板的输出光线均匀分布。 The main purpose of the light guide plate guiding light direction, and uniform distribution of light output of the light guide plate. 本发明所述的背光模组可供液晶显示装置使用, 也可供计算机键盘、行动电话按键、广告牌及其它需要平面光源的装置使用。 The backlight module according to the present invention is used for a liquid crystal display device, the device is also used for computer keyboard, mobile phone keys, billboards and other needs of the planar light source. 进一步而言, 本发明还包含使用此导光板的液晶显示装置。 Further, the present invention further comprises a liquid crystal display device using this light guide plate. 此处所言的液晶显示装置泛指使用液晶面板的显示装置,包含家用的液晶电视、计算机、手机及数字相机的液晶显示屏等。 Said here refers to a liquid crystal display device using the liquid crystal panel display device, including home LCD TVs, computers, mobile phones and digital camera's LCD displays. 以下将结合附图及实施例对本发明所述的导光板和背光模组进行具体说明。 The accompanying drawings and the following embodiments of the light guide plate and backlight module according to the present invention will be specifically described. 参阅图l,本发明的第一个实施例提供了一种导光板130,包括入光面131,与入光面131相对的出光面132,以及连接所述入光面131和所述出光面132的侧面(图未标示),入光面131上布有散射结构135,入光面131和出光面上132都具有一个凹槽结构,入光面131的凹槽结构和出光面132的凹槽结构是在导光板上挖去一个旋转体形成的结构,入光面的凹槽结构称为第一凹槽134,出光面的凹槽结构称为第二凹槽133,第一凹槽134和第二凹槽133的旋转轴经过导光板入光面131和出光面132的中心。 Referring to FIG. L, a first embodiment of the present invention provides a light guide plate 130, 131 includes a light incident surface, the light incident surface 131 and the opposing surface 132, and 131 connected to the light incident surface and the exit surface the side surface 132 (not shown), the fabric structure 135 has the scattering light incident surface 131, the surface 131 and the light exit surface 132 has a groove structure, the surface structure of the groove 131 and the concave surface 132 is dredged trench structures on the light guide structure of a rotary body is formed, the surface structure is called a first recess groove 134, the groove structure is referred to as a second groove surface 133, a first recess 134 and a rotary shaft groove 133 of the second guide plate through the light incident surface 131 and the surface 132 of the center. 第二凹槽133的表面还可涂有反射材料,该反射材料可根据需要选择反射性能,用以不同程度的增加第二凹槽133 对光线的反射效果, Surface of the second groove 133 may also be coated with a reflective material, the reflective material can be selected according to the performance of the reflector for reflecting the effect of different degrees of increase of the second groove 133 to light,

如图1所示,导光板130是在长方体型或正方体型透光板的出光面132上挖去一个由三角形绕导光板的中心轴旋转而形成的旋转体和在入光面131挖去一个半球体后所形成的结构。 As illustrated, the light guide plate 130 is a rectangular parallelepiped or a cube in the translucent surface of the plate 132 about a central axis of the cut-out triangle formed by the rotation of the light guide plate rotating body and a light incident surface 131 in the cut-out after the hemisphere formed structure. 所述出光面132上的第二凹槽133具有与上述所挖去的立体相对应的表面形状,所述入光面131上的第一凹槽134具有与上述所挖去的立体相对应的表面形状。 A second groove on said surface 132,133 has a surface shape of the cut-out perspective view of the above corresponds to the light receiving surface into the first recess 131,134 has a cut-out perspective view of the above corresponds to surface shape.

图2显示第二个实施例所述的导光板与第一个实施例的不同之处在于两个凹槽的形状 FIG 2 is different from the second display in the embodiment of the light guide plate with the first embodiment in that the shape of the two grooves

不同:导光板130是在长方体型或正方体型透光板的出光面132上挖去一个由三角形绕导 Different: light guide plate 130 is turned about a triangular cut-out on the rectangular surface or a cube type translucent plate 132

光板的中心轴旋转而形成的旋转体和在入光面131挖去一个由三角形绕导光板的中心轴旋 The center of the light axis of the rotating plate in rotation and is formed into a cut-out surface 131 around the central axis of the light guide plate by the rotation of the triangle

转形成所形成的旋转体后形成的结构。 Structure formed after the rotating body is formed in turn formed.

图3显示第三个实施例所述的导光板与第一个实施例的不同之处在于两个凹槽的形状不同:导光板130是在长方体型或正方体型透光板的出光面132上挖去一个由三角形绕导光板的中心轴旋转而形成的旋转体和在入光面131挖去一个由任意曲线绕导光板的中心轴旋转形成的旋转体后形成的结构。 Figure 3 shows a third embodiment of the light guide plate is different from the first embodiment of the two grooves of different shapes: in the light guide plate 130 is a rectangular parallelepiped or a cube type translucent plate the surface 132 digging a rotating body around the central axis of rotation of the triangle formed by the light guide plate and the rear cut-out is formed by a rotary body about a curvilinear central axis of the light guide plate in the light incident surface 131 formed structure.

图4显示第四个实施例所述的导光板与第一个实施例的不同之处在于两个凹槽的形状不同:导光板130是在长方体型或正方体型透光板的出光面132上挖去一个由三角形绕导光板的中心轴旋转而形成的旋转体和在入光面131挖去一个由梯形绕导光板的中心轴旋转形成所形成的旋转体后形成的结构。 Differs from the embodiment of FIG. 4 shows a fourth embodiment of the light guide plate and the first embodiment in that the two grooves of different shapes: in the light guide plate 130 is a rectangular parallelepiped or a cube type translucent plate the surface 132 digging a rotating body around the central axis of rotation of the triangle formed by the light guide plate and the light incident surface is formed after the cut-out 131 of trapezoidal shape about a central axis of the light guide plate is formed rotator structure is formed.

图5显示第五个实施例所述的导光板与第一个实施例的不同之处在于两个凹槽的形状不同:导光板130是在长方体型或正方体型透光板的出光面132上挖去一个由半圆形绕导光板的中心轴旋转而形成的旋转体和在入光面131挖去一个由半圆绕导光板的中心轴旋转形成所形成的旋转体后形成的结构。 5 shows a fifth embodiment of the light guide plate is different from the first embodiment of the two grooves of different shapes: in the light guide plate 130 is a rectangular parallelepiped or a cube type translucent plate the surface 132 digging a rotating body around the central axis of rotation by a semi-circular guide plate is formed and after formed into a cut-out surface 131 of the light guide plate by a semicircle around a central axis formed by the rotary body formed structure.

图6显示第六个实施例所述的导光板与第一个实施例的不同之处在于两个凹槽的形状不同:导光板130是在长方体型或正方体型透光板的出光面132上挖去一个以导光板的中心轴为旋转轴的半球体和在入光面131挖去一个由任意曲线绕导光板的中心轴旋转形成所形成的旋转体后形成的结构。 6 shows a sixth embodiment of the light guide plate is different from the first embodiment of the two grooves of different shapes: in the light guide plate 130 is a rectangular parallelepiped or a cube type translucent plate the surface 132 digging a hemisphere with the center axis of the light guide plate and the rotary shaft 131 in the cut-out surface of the light guide plate about a central axis of the curvilinear structure formed after forming the rotating body is formed.

上述图1至图6所示的实施例仅为实施本发明的范例。 The above-described embodiment shown in FIGS. 1 through 6 is merely illustrative of the present invention. 也就是说,第一凹槽134可以由在长方体型或正方体型透光板130的出光面132上挖去一个由长方形、正方形、梯形、 三角形、半圆或任意曲线绕导光板的中心轴转而形成的旋转体后形成。 That is, a first cut-out groove 134 may turn about the central axis of the light guide plate of a rectangular, square, trapezoidal, triangular, semi-circular 132, or any curve in a rectangular parallelepiped or a cube translucent surface 130 of the plate formed after the formation of the rotary member. 第二凹槽133可以由在长方体型或正方体型透光板130的出光面132上挖去一个由长方形、正方形、梯形、 三角形、半圆或任意曲线绕导光板的中心轴转而形成的旋转体后形成。 The second recess 133 may be cut-out in a rectangular parallelepiped or a cube translucent surface plates 130, 132 around a rotating body of a rectangular, square, trapezoidal, triangular, semicircular or any curved guide plate is formed instead of the central axis after formation. 导光板130的第一凹槽和第二凹槽结构可以相同,也可以不相同。 The first and second grooves may be the same structure of the light guide plate 130, you may not be the same.

所述导光板130的入光面131上布有散射结构135,例如散射网点,用以将到达散射结构135的光线均匀化。 The cloth guide plate 135 on the light incident surface scattering structures 131,130, e.g. network scatter, to reach the light scattering structure 135 uniform. 导光板130的出光面132的第二凹槽133的表面还可有反射材料, 该反射材料可根据需要选择反射率,用以不同程度的增加第二凹槽133对光线的反射效果, 这样从导光板110出射的光线的分布也会相应被调整,从而背光模组100可以达到所需亮度均匀性的发光效果。 Surface of the second recess 133 of the surface 132 of the light guide plate 130 may also be a reflective material, the reflective material may be selected according to required reflectivity, to increase the effect of different degrees of reflection to light of the second groove 133, so that the distribution of the light exiting the light guide plate 110 is adjusted accordingly, so that the backlight module 100 can achieve the desired effect of light emission luminance uniformity.

参阅图7,本发明的第七个实施例提供了一种背光模组100,包括导光板130、设在导光板130的入光面正下方的光源110、与导光板130的入光面相对应设置的反射板120,以及依次设在导光板130出光侧的扩散膜片140、棱镜膜片150和偏振膜片160。 Referring to Figure 7, a seventh embodiment of the present invention provide a backlight module 100, comprising a light source 110 below the surface of the n-guide plate 130, provided in the light guide plate 130, the light guide plate 130 corresponding to the light incident surface reflection plate 120 is provided, and the diffusion film 140, a prism film 150 and the polarizing film 160 are sequentially provided on the light side of the light guide plate 130.

光源110可以是单颗LED芯片,也可以是由R、 G、 B三基色LED芯片装配而成的光源。 The light source 110 may be a single LED chip, or may be assembled from a light source R, G, B three-color LED chip formed. 当光源110发出光线时,部分不能直接进入导光板130的光线会经反射板120反射, 最后进入导光板130。 When the light source 110 emits light, the light guiding plate part 130 can not directly be reflected to the reflection plate 120, and finally enters the light guide plate 130. 在较佳实施例中,反射板120的反射效率接近100%。 In the preferred embodiment, the reflection efficiency of the reflective plate 120 close to 100%.

反射板120设置在导光板130下方,中间开有一孔放置光源110,保证光源发出的光线都能进入导光板130内部。 Reflector 120 disposed under the light guide plate 130, an intermediate opening a hole placed light source 110, to ensure that light emitted from the light source can enter the light guide plate 130.

所述导光板130采用本发明的上述结构,即导光板130,包括入光面131,与入光面131 相对的出光面132,以及连接所述入光面131和所述出光面132的侧面(图未标示),入光面131上布有散射结构135,入光面131和出光面上132都具有一个凹槽结构,入光面131的凹槽结构和出光面132的凹槽结构是在导光板上挖去一个旋转体形成的结构,入光面的凹槽结构称为第一凹槽134,出光面的凹槽结构称为第二凹槽133,第一凹槽134和第二凹槽133的旋转轴经过导光板入光面131和出光面132的中心。 The light guide plate 130 using the above-described structure of the present invention, i.e. the light guide plate 130, 131 includes a light incident surface, the light incident surface 131 and the opposing surface 132, and 131 connected to the light incident surface and a side surface 132 of the (not shown), the fabric structure 135 has the scattering light incident surface 131, the surface 131 and the light exit surface 132 has a groove structure, the surface structure of the groove 131 and the surface of the groove structure 132 is a cut-out structure on the light guide plate is formed of the rotating body, the surface structure is called a first recess groove 134, the groove structure is referred to as a second groove surface 133, a first and a second recess 134 the rotary shaft groove 133 of the light guide plate through the incident surface 131 and the surface 132 of the center. 具体地说,第一凹槽134可以是在导光板入光面上挖去一个由长方形、正方形、梯形、三角形、半圆或任意曲线绕经过导光板入光面和出光面的中心的旋转轴旋转而形成的旋转体后形成的。 Specifically, the first groove 134 may be a rotary shaft guide plate digging a light-receiving surface of a rectangular, square, trapezoidal, triangular, semi-circular or arbitrary curve about the light guide plate through the light incident surface and the center of rotation of the surface after the formation of the rotary member is formed. 第二凹槽133可以是在导光板出光面上挖去一个由长方形、正方形、梯形、三角形、半圆或任意曲线绕经过导光板入光面和出光面的中心的旋转轴旋转而形成的旋转体后形成的。 The second recess 133 may be a rotary body surface of the light guide plate showing a cut-out through the rotation shaft into the light guide plate and the wound surface of a rectangular, square, trapezoidal, triangular, semicircular or any curved surface of the rotation center is formed after formation. 也就是说,当所挖去的立体为圆柱体或圆台体时,所形成的凹槽结构包括一个底面和一个侧面。 That is, when the cut-out perspective view of a cylinder or truncated cone, comprises a groove structure formed by a bottom surface and a side surface. 所述底面可为平面,所述侧面可以为圆锥面、圆柱面或曲面。 The bottom surface may be planar, the side surface may be a conical surface, a cylindrical surface or a curved surface. 当所挖去的旋转体为圆锥体或半球体时, 所形成的凹槽结构的表面为一个曲面,该曲面为圆锥面或球面。 When the rotating body is dredged cone or hemisphere, the surface structure of the recess formed is a curved surface is a spherical or conical surface.

第七个实施例所述的背光模组100使用的导光板130的结构与图1中显示的导光板相同,第二凹槽133的表面为圆锥面,第一凹槽134的表面为球面,并且第一凹槽133和第二凹槽134的旋转轴经过导光板130入光面和出光面的中心。 A seventh embodiment of the backlight module of the light guide plate 100 used in embodiment 130 of the configuration as shown in Figure 1 is the same as the light guide plate, the surface of the second groove 133 is a conical surface, the first surface of the recess 134 is a spherical surface, and the first groove 133 and second groove 134 of the rotation shaft 130 via the guide plate surface and the center of the surface. 可以理解,第二凹槽133的表面为圆锥面时,锥角的大小和圆锥面的半径都是可以变化的。 It will be appreciated, the surface of the second recess 133 is a conical surface, and the radius of the conical surface of the cone angle is variable. 作为替换,第二凹槽133 的表面也可以是球面;第一凹槽134的表面也可以为锥面。 Alternatively, the surface of the second recess 133 may also be spherical; surface of the first groove 134 may be a tapered surface.

所述导光板130的入光面131布有散射结构135,例如散射网点,用以将到达散射结构135的光线均匀化。 The light guide plate 130 into the surface 131 of fabric scattering structure 135, e.g. network scatter, to reach the light scattering structure 135 uniform. 导光板130的出光面132的第二凹槽133的表面可以设置反射材料,用以增强凹槽结构133的反射功效。 Surface of the second recess 133 of the surface 132 of the light guide plate 130 may be a reflective material to enhance the effectiveness of the reflective groove structure 133.

所述反射板120和导光板130的入光面131相对设置,可以和导光板130结合在一起,也可以和导光板130间隔一段距离相对设置。 The light incident surface 131 and the reflection plate 120 disposed opposite the light guide plate 130, and the light guide plate 130 may be combined, and 130 may be spaced from the light guide plate disposed opposite. 本例中,反射板120的第一底面121和导光板130的入光面131相结合,反射板120也可以是一层高反射膜。 In this embodiment, the bottom surface of the first reflection surface plate 120 into the light guide plate 130 and 131,121 in combination, the reflective plate 120 may be a high reflection coating layer.

扩散膜片140,棱镜膜片150,以及偏振膜片160依次设置在导光板130的出光侧,如图7所示,从导光板130出射的光经过扩散膜片140后,光线发生扩散和偏向;然后经过棱镜膜片150,光线的发散角变小;最后经过偏振模片160变成偏振光,这样便将导光板130射出的光线进一步分散化、均匀化。 Diffusion film 140, a prism film 150, and a polarization film 160 are sequentially disposed on a side of the light guide plate 130, shown in Figure 7, the light passes through the diffusion film 140, the occurrence of light diffusion guide plate 130 and emitted toward the ; then through the prism film 150, the divergence angle of the light becomes smaller; and finally through the polarizer 160 polarizing the die, so that the light emitted from light guide plate 130 put further dispersion, homogenization. 扩散膜片140,棱镜膜片150,以及偏振膜片160 均为现有技术中背光模组结构中所常用的元件。 Diffusion film 140, a prism film 150, and a polarization film 160 are prior art commonly used in the backlight module structure elements.

此实施例的背光模组100在工作过程中,光源110发出的光线大部分直接通过导光板130的入光面131的凹槽结构134进入导光板130,另一部分光线经反射板120反射后进入导光板130的入光面131,从而进入导光板130内部。 Groove structure 134 of this embodiment of the backlight module 100 during operation, most of the light emitted from the light source 110 directly into the light guide plate 130 into the surface 131 of the light guide plate 130, the other part of the light reflected by the reflecting plate 120 after entering the surface of the light guide plate 131 130, 130 to enter the light guide plate. 进入导光板130的光一部分直接经过出光面132上第二凹槽133的外围区域被导引出导光板130; —部分光在导光板130内发生全反射后到达入光面131上第一凹槽134的表面,经第一凹槽134反射后再到达出光面132 被导引出导光板130; —部分到达出光面132的第二凹槽133的表面,经细二凹槽133的表面反射后到达导光板130的入光面131,具体为到达入光面131上第一凹槽134区域的外围区域,再经该外围区域反射到出光面132上第二凹槽133的外围区域,这样光线最终从出光面132上第二凹槽133的外围区域被导引出导光板130。 Part of the light entering the light guide plate 130 directly through the peripheral region of the second groove 133 on surface 132 of guide plate 130 are guided; - portion of the light guide plate 130 reaches a first recess 131 on the light incident surface is totally reflected surface of the groove 134, through the first recess 134 and then reaches the reflecting surface 132 is guided out of the light guide plate 130; - portion reaches the surface of the second recess 132 surface 133, reflected by the surface of fine titanium recess 133 after reaching the surface 131 into the light guide plate 130, specifically to reach the surface region 131 on the peripheral region of the first recess 134, and then reflected by the peripheral region to the surface 132 on the peripheral region of the second recess 133, so that the final light from the light-receiving surface 132 on the peripheral region of the second groove 133 is guided out of the light guide plate 130.

因此,由于导光板130出光面132表面第二凹槽133的设置,导光板130出光面132 与光源110相对应的区域的光线分布会被削弱,出光面132与光源110相对应的区域的外围区域(也就是出光面132上第二凹槽133的外围区域)的光线分布会相应增加,这样从导光板IIO的出光面132出射的光线整体上分布比较均匀,从而背光模组IOO具有较为均一的发光亮度;同时,由于导光板入光面131上第一凹槽134的设置,导光板130内的光线经过第一凹槽134表面反射或折射后改变光路,使得出射光区域的形状与导光板出光面的形状相同。 Accordingly, since the surface of the light guide plate 130 surface 132 of the second recess 133 is provided, the light guide plate 130 and the surface 132 of the light source region 110 corresponding to the distribution will be weakened, the peripheral surface 132 and 110 corresponding to the source region ray region (i.e. the groove 133 in the peripheral region on the second surface 132) of the profile will increase, so that the distribution on the whole surface 132 of light emitted from the light guide plate uniform IIO, thereby having a more uniform backlight module IOO the emission luminance; Also, since the light guide plate 131 into the upper surface of the first recess 134 is provided, the light in the light guide plate 130 through the first recess 134 change the optical path back surface reflected or refracted, so that the shape of the outgoing light guide region the shape of the light emitting surface of the same plate.

第二凹槽133的表面可形成有反射材料,该反射材料可根据需要选择反射性能,用以不同程度的增加第二凹槽133对光线的反射效果,这样从导光板110出射的光线的分布也会相应被调整,从而背光模组IOO可以达到所需亮度均匀性的发光效果。 Surface of the second recess 133 may be formed with a reflective material, the reflective material may be selected according to the reflective properties required for increased reflection effect to varying degrees the second groove 133 to light, the light guide plate 110 so that the light emitted from the distribution It is adjusted accordingly, so that the backlight module IOO achieve desired lighting effects luminance uniformity.

所述导光板130的材质可为聚甲基苯烯酸甲酯(PMMA),或玻璃等其它透明材料。 The material of the light guide plate 130 can be poly-methylbenzene-enoate another transparent material (PMMA), or glass. 反射板120可以是一层反射膜直接镀在导光板130的入光面131上。 Reflection plate 120 may be a layer of reflective film is directly coated on the light incident surface 131 of the light guide plate 130.

参阅图8,本发明的第八个实施例提供了一种背光模组,其结构与和第七个实施例的背光模组大体相同,其区别在于:第八个实施例提供的背光模组100中,反射板120和导光板130间隔一段距离设置;反射板120中心开有一孔便于放置光源110;导光板130的结构与图3显示的相同,入光面131上第一凹槽234包括一个底面和一个侧面,底面为球形, 侧面为圆柱形侧面。 Referring to Figure 8, an eighth embodiment of the present invention provide a backlight module, a backlight module of substantially the same construction as the embodiment and the seventh embodiment, except that: the backlight module of the eighth embodiment provided 100, the reflector 120 and the light guide plate 130 disposed at a distance; center of the reflecting plate 120 has a hole opening to facilitate placement of the light source 110; the same structure as FIG. 3 shows the light guide plate 130, a first groove comprising a light incident surface 131 234 a bottom surface and a side surface, a bottom surface of a spherical, cylindrical side surface side.

上述实施例的背光模组中,光源在导光板的入光面的正下方,导光板下面设置有反射板,且导光板出光面和入光面均设置有凹槽结构。 The backlight module of the above embodiment, the light source directly below the surface of the light guide plate, a reflection plate disposed below the light guide plate, the light guide plate and the light incident surface and exit surface are each provided with a groove structure. 出光面设置凹槽结构使得光源发出的光线从导光板导出后,导光板出光面与光源相对应的区域的光线分布会被削弱,同时,导光板出光面与光源相对应的区域的外围区域的光线分布会相应增加,这样从导光板出射的光线的总体分布会比较均匀,从而背光模组具有较为均一的发光亮度;入光面设置凹槽结构, 可以改变导光板中的光路,使得出射光区域的形状规则,与导光板出光面的形状相同;导光板入光面上还有散射结构,这种微结构分布能使光线散射、折射和反射,进一步提高导光板的出光效率和整个板面的亮度均匀性。 The surface structure is provided a recess so that light emitted from the light guide light source derived, the light guide plate surface region corresponding to the light distribution will be weakened, while the peripheral area of ​​the light guide plate and the light receiving surface of the corresponding light distribution will increase, so will the overall distribution of light exiting from the light guide plate is more uniform, so that the backlight module having a more uniform emission luminance; surface into the notch structure is provided, the light path can be changed in the light guide plate, so that the emitted light regular shape of the region, the same as the surface shape of the light guide plate; structured light scattering guide plate surface into the well, which can make the light distribution of scattering microstructures, refraction and reflection, and to further improve the light efficiency of the entire face of the guide plate uniformity of luminance. 通过凹槽结构设计可以使得利用LED光源的导光板亮度均匀;使用几个导光板的组合的背光模组既可以用作小尺寸的液晶显示装置,也能用在大尺寸的液晶显示器中。 Through the groove design may be such that a uniform brightness of the light guide plate using an LED light source; using a combination of several light guide plate of the backlight module can be used both as a small-sized liquid crystal display device, a liquid crystal display can also be used in a large size.

可以理解的是,对于本领域的普通技术人员来说,可以根据本发明的技术方案和技术构思做出其他各种相应的改变和变形,而所有这些改变和变形都应属于本发明权利要求的保护范围。 It will be appreciated that those of ordinary skill in the art, may make various corresponding modifications and other variations according to the technical idea and technical solutions of the present invention, and all such changes and modifications should fall into the claims of the invention protected range. 本发明己由上述相关实施例加以描述,然而上述实施例仅为实施本发明的范例。 The present invention has been described by the above related embodiment, however, the above-described embodiments are merely exemplary embodiments of the present invention. 必需指出的是,已公开的实施例并未限制本发明的范围。 It must be noted that the disclosed embodiments do not limit the scope of the present invention. 相反地,包含于权利要求书的精神及范围的修改及均等设置均包含于本发明的范围内。 Rather, the claims comprising the spirit and scope of modifications and equivalents are deemed to be within the scope of the present invention.

Claims (10)

  1. 1.一种导光板,包括入光面、与该入光面相对的出光面以及连接所述入光面和出光面的侧面,其特征在于,该导光板的入光面上布有散射结构,所述入光面和出光面上都具有一个凹槽结构,入光面的凹槽结构和出光面的凹槽结构是在导光板上挖去一个旋转体后形成的结构,入光面的凹槽结构称为第一凹槽,出光面的凹槽结构称为第二凹槽,所述第一凹槽和第二凹槽的旋转轴经过导光板入光面和出光面的中心。 A light guide plate comprising a light incident surface, the light incident surface opposite to the light incident surface connecting said surface and a side surface, characterized in that the surface of the light scattering guide plate fabric structure the light incident surface and the light exit surface having a groove structure, the surface of the groove structure and the surface structure of the groove structure are formed after digging a rotating body on the light guide plate, the light incident surface groove structure called a first groove, the groove structure is referred to as a second groove surface, the first rotation shaft and second grooves into the surface of the light guide plate through the light-receiving surface and the center.
  2. 2. 如权利要求1所述的导光板,其特征在于,所述第二凹槽的表面涂有反射材料。 2. The light guide plate according to claim 1, wherein said second recess surface is coated with a reflective material.
  3. 3. 如权利要求1所述的导光板,其特征在于,所述第一凹槽是在导光板入光面上挖去一个由长方形、正方形、梯形、三角形、半圆或任意曲线绕经过导光板入光面和出光面的中心的旋转轴旋转而形成的旋转体后形成的。 3. The light guide plate according to claim 1, wherein said first recess is a cut-out surface of the light guide plate wound into a rectangular, square, trapezoidal, triangular, semi-circular or arbitrary curves through the light guide plate light incident surface and a rear rotation axis center of the rotating body of the rotation surface formed by formation.
  4. 4. 如权利要求1所述的导光板,其特征在于,所述第二凹槽是在导光板出光面上挖去一个由长方形、正方形、梯形、三角形、半圆或任意曲线绕经过导光板入光面和出光面的中心的旋转轴旋转而形成的旋转体后形成的。 4. The light guide plate according to claim 1, characterized in that said second recess is a cut-out showing the light guide plate in a surface of a rectangular, square, trapezoidal, triangular, semi-circular or arbitrary curve about the light guide plate through the rotation axis center of the rotating surface and the surface of the rotating body is formed after the formation.
  5. 5. —种背光模组,包括导光板、设在导光板的入光面正下方的光源、与导光板的入光面相对应设置的反射板,以及依次设在导光板出光侧的扩散膜片、棱镜膜片和偏振膜片; 其特征在于,所述导光板包括入光面、与该入光面相对的出光面以及连接所述入光面和出光面的侧面,所述入光面上布有散射结构,所述入光面和出光面上都具有一个凹槽结构, 入光面的凹槽结构和出光面的凹槽结构是在导光板上挖去一个旋转体后形成的结构,入光面的凹槽结构称为第一凹槽,出光面的凹槽结构称为第二凹槽,所述第一凹槽和第二凹槽的旋转轴经过导光板入光面和出光面的中心。 5. - backlight module includes a light guide, a light guide plate disposed below the light incident surface of the positive reflective surface into the light guide plate and the corresponding settings, and are sequentially provided in the light guide plate side of the diffusion film , prism film and the polarizing film; characterized in that said light guide comprises a light incident surface, the surface opposite to the light emitting surface and the light incident surface and connected to a side surface of the light-receiving surface cloth scattering structure, the incident surface and the light exit surface having a groove structure, the surface of the groove structure and the surface structure of the groove structures are formed after digging a rotating body on the light guide plate, the surface structure is called a first recess grooves, the groove structure is referred to as a second groove surface, the first rotation shaft and second grooves into the surface of the light guide plate through the light emitting surface and center of.
  6. 6. 如权利要求5所述的背光模组,其特征在于,所述反射板是直接镀在导光板入光面上的反射膜。 The backlight module as claimed in claim 5, characterized in that said reflecting plate is a reflecting film deposited directly on the light incident surface of the light guide plate.
  7. 7. 如权利要求5所述的背光模组,其特征在于,所述反射板和导光板的入光面间隔一段距离相对设置。 7. The backlight module according to claim 5, wherein the surface of said reflector plate spaced from and opposite the light guide plate.
  8. 8. 如权利要求5所述的背光模组,其特征在于,所述第二凹槽的表面涂有反射材料。 8. The backlight module according to claim 5, wherein the second surface of the groove is coated with a reflective material.
  9. 9. 如权利要求5所述的背光模组,其特征在于,所述第一凹槽是在导光板入光面上挖去一个由长方形、正方形、梯形、三角形、半圆或任意曲线绕经过导光板入光面和出光面的中心的旋转轴旋转而形成的旋转体后形成的。 9. The backlight module according to claim 5, wherein said first recess is a cut-out surface of the light guide plate wound into a rectangular, square, trapezoidal, triangular, semi-circular or arbitrary curves through the guide after the light incident surface plate and the axial center of the rotating body formed by the rotational surface is formed.
  10. 10. 如权利要求5所述的背光模组,其特征在于,所述第二凹槽是在导光板出光面上挖去一个由长方形、正方形、梯形、三角形、半圆或任意曲线绕经过导光板入光面和出光面的中心的旋转轴旋转而形成的旋转体后形成的。 10. The backlight module according to claim 5, characterized in that said second recess is a cut-out in the face of a light guide plate around a rectangular, square, trapezoidal, triangular, semi-circular or arbitrary curves through the light guide plate light incident surface and a rear rotation axis center of the rotating body of the rotation surface formed by formation.
CN 200710303686 2007-12-20 2007-12-20 Light guide board and back light module unit using the same CN101206280A (en)

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Cited By (19)

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CN101968186A (en) * 2010-07-30 2011-02-09 南京中电熊猫液晶显示科技有限公司 Large luminous angle LED backlight source module
CN101988664A (en) * 2010-11-04 2011-03-23 友达光电股份有限公司 Edge-lit backlight module
WO2011032506A1 (en) * 2009-09-18 2011-03-24 Luxingtek, Ltd. Lighting device and light spreading plate thereof
CN101644415B (en) 2008-08-09 2011-03-30 鸿富锦精密工业(深圳)有限公司 Light guide plate and backlight module
CN102003638A (en) * 2009-04-27 2011-04-06 恩普乐股份有限公司 Light emitting apparatus, surface light source apparatus and display apparatus
CN102287690A (en) * 2011-04-29 2011-12-21 友达光电股份有限公司 Backlight module
CN101515068B (en) 2008-02-20 2012-01-04 奇菱科技股份有限公司 Light evener and backlight module comprising same
CN101988640B (en) 2009-07-29 2012-04-11 苏州璨宇光学有限公司 Lighting device and backlight module applying same
CN102900999A (en) * 2011-07-29 2013-01-30 Lg伊诺特有限公司 Backlight unit and display apparatus using the same
CN102943973A (en) * 2011-08-15 2013-02-27 中强光电股份有限公司 Side-entry backlight module
US8388159B2 (en) 2009-10-16 2013-03-05 Tsinghua University Light guide plates and backlight module
CN102052600B (en) 2009-11-10 2013-04-24 清华大学 Backlight module and liquid crystal display
CN103104887A (en) * 2011-11-15 2013-05-15 林奇锋 Light guide component, LED lamp tube and lighting lamp
CN103375732A (en) * 2012-04-13 2013-10-30 群康科技(深圳)有限公司 Backlight module, light guide plate of backlight module, and display comprising the backlight module
CN103486494A (en) * 2012-06-14 2014-01-01 冠捷投资有限公司 Backlight module
CN103499068A (en) * 2013-09-30 2014-01-08 京东方科技集团股份有限公司 Backlight source, splicing type backlight source and display device
CN103543558A (en) * 2013-10-30 2014-01-29 桂林福冈新材料有限公司 Method for removing backlight hot spot phenomenon of LED (Light Emitting Diode)
WO2014015547A1 (en) * 2012-07-26 2014-01-30 深圳市华星光电技术有限公司 Backlight module and display device
CN103791449A (en) * 2012-10-30 2014-05-14 林咨佑 Flat light guide module

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CN101515068B (en) 2008-02-20 2012-01-04 奇菱科技股份有限公司 Light evener and backlight module comprising same
CN101644415B (en) 2008-08-09 2011-03-30 鸿富锦精密工业(深圳)有限公司 Light guide plate and backlight module
CN102003638B (en) 2009-04-27 2014-02-05 恩普乐股份有限公司 Light emitting apparatus, surface light source apparatus and display apparatus
CN102003638A (en) * 2009-04-27 2011-04-06 恩普乐股份有限公司 Light emitting apparatus, surface light source apparatus and display apparatus
CN101988640B (en) 2009-07-29 2012-04-11 苏州璨宇光学有限公司 Lighting device and backlight module applying same
WO2011032506A1 (en) * 2009-09-18 2011-03-24 Luxingtek, Ltd. Lighting device and light spreading plate thereof
US8382337B2 (en) 2009-09-18 2013-02-26 Luxingtek, Ltd. Lighting device, light spreading plate and method for manufacturing the same
US8388159B2 (en) 2009-10-16 2013-03-05 Tsinghua University Light guide plates and backlight module
CN102042562B (en) 2009-10-16 2013-07-03 清华大学 Light conducting board and back light module
CN102052600B (en) 2009-11-10 2013-04-24 清华大学 Backlight module and liquid crystal display
US8576352B2 (en) 2009-11-10 2013-11-05 Tsinghua University Backlight module comprising an integrally joined light guide plate structure having at least one groove dividing the light guide plate into a plurality of sub-light guide plates wherein the at least one groove is filled with a reflective material
CN101968186A (en) * 2010-07-30 2011-02-09 南京中电熊猫液晶显示科技有限公司 Large luminous angle LED backlight source module
CN101988664A (en) * 2010-11-04 2011-03-23 友达光电股份有限公司 Edge-lit backlight module
CN102287690B (en) * 2011-04-29 2015-06-24 友达光电股份有限公司 Backlight module
CN102287690A (en) * 2011-04-29 2011-12-21 友达光电股份有限公司 Backlight module
CN102900999A (en) * 2011-07-29 2013-01-30 Lg伊诺特有限公司 Backlight unit and display apparatus using the same
CN102900999B (en) * 2011-07-29 2017-04-26 Lg伊诺特有限公司 A backlight unit and a display device using the backlight unit
CN102943973A (en) * 2011-08-15 2013-02-27 中强光电股份有限公司 Side-entry backlight module
CN103104887A (en) * 2011-11-15 2013-05-15 林奇锋 Light guide component, LED lamp tube and lighting lamp
CN103375732A (en) * 2012-04-13 2013-10-30 群康科技(深圳)有限公司 Backlight module, light guide plate of backlight module, and display comprising the backlight module
CN103486494A (en) * 2012-06-14 2014-01-01 冠捷投资有限公司 Backlight module
WO2014015547A1 (en) * 2012-07-26 2014-01-30 深圳市华星光电技术有限公司 Backlight module and display device
CN103791449B (en) * 2012-10-30 2016-08-31 林咨佑 Planar light guide module
CN103791449A (en) * 2012-10-30 2014-05-14 林咨佑 Flat light guide module
CN103499068A (en) * 2013-09-30 2014-01-08 京东方科技集团股份有限公司 Backlight source, splicing type backlight source and display device
CN103499068B (en) * 2013-09-30 2016-03-09 京东方科技集团股份有限公司 A backlight, the tiled backlight and a display device
CN103543558A (en) * 2013-10-30 2014-01-29 桂林福冈新材料有限公司 Method for removing backlight hot spot phenomenon of LED (Light Emitting Diode)

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