WO2014067172A1 - 导光板及用该导光板的背光模组 - Google Patents
导光板及用该导光板的背光模组 Download PDFInfo
- Publication number
- WO2014067172A1 WO2014067172A1 PCT/CN2012/084261 CN2012084261W WO2014067172A1 WO 2014067172 A1 WO2014067172 A1 WO 2014067172A1 CN 2012084261 W CN2012084261 W CN 2012084261W WO 2014067172 A1 WO2014067172 A1 WO 2014067172A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- guide plate
- light guide
- light
- light incident
- backlight module
- Prior art date
Links
- 238000004026 adhesive bonding Methods 0.000 claims description 3
- 239000012788 optical film Substances 0.000 claims description 3
- 239000003292 glue Substances 0.000 claims 1
- 230000017525 heat dissipation Effects 0.000 claims 1
- 239000004973 liquid crystal related substance Substances 0.000 description 14
- 238000010586 diagram Methods 0.000 description 6
- 238000009826 distribution Methods 0.000 description 5
- 238000004049 embossing Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 238000005286 illumination Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000003486 chemical etching Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/0036—2-D arrangement of prisms, protrusions, indentations or roughened surfaces
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
- G02B6/0086—Positioning aspects
Definitions
- the present invention relates to the field of liquid crystal display, and in particular to a light guide plate and a backlight module using the same. Background technique
- Liquid crystal display has many advantages such as thin body, power saving, and no radiation, and has been widely used.
- Most of the liquid crystal display devices on the market are backlight type liquid crystal displays, which include a liquid crystal panel and a backlight module.
- the working principle of the liquid crystal panel is to place liquid crystal molecules in two parallel glass. There are many vertical and horizontal small wires between the two glass plates.
- the liquid crystal molecules are controlled to change direction by energization or not, and the light of the backlight module is refracted. Picture. Since the liquid crystal panel itself does not emit light, it is necessary to display the image normally by the light source provided by the backlight module. Therefore, the backlight module becomes one of the key components of the liquid crystal display device.
- the backlight module is divided into a side-in type backlight module and a direct-type backlight module according to different incident positions of the light source.
- a light source such as a CCFL (Cold Cathode Fluorescent Lamp) or an LED (Light Emitting Diode) is disposed behind the liquid crystal panel, and a surface light source is directly formed and supplied to the liquid crystal panel.
- CCFL Cold Cathode Fluorescent Lamp
- LED Light Emitting Diode
- the side-lit backlight module is provided with an LED light bar disposed on the edge of the back panel behind the liquid crystal panel, and the light emitted by the LED strip enters the light guide plate from the light incident surface of the light guide plate, and is reflected and After being diffused, it is emitted from the light-emitting surface of the light guide plate to form a surface light source to be supplied to the liquid crystal panel.
- the dots are arranged on the bottom surface of the light guide plate, and the functions of the dots are to change the direction of light propagation.
- the manufacturing methods of the dots mainly include ink printing, mechanical engraving, chemical etching, mold injection molding, etc. .
- the reflective surface 302 of the mesh point 300 of the bottom surface 102 of the conventional light guide plate 100 is parallel to the bottom surface 102 of the light guide plate 100.
- the light source 500 is located at one side of the light guide plate 100, and the emitted light is incident on the mesh point. Total reflection occurs on the reflecting surface 302 of the 300, and then exits from the light emitting surface 304 of the light guide plate 100.
- the spatial distribution of the emitted light is not symmetric with the normal direction of the light guide plate 100.
- the direction of the maximum energy of the light is not the normal direction of the light guide plate 100, but a direction with a larger angle ⁇ from the normal direction, resulting in light.
- the utilization rate is small, and a diffusion sheet is added to the light guide plate 100 to correct the direction of the emitted light, and the direction of the maximum light energy is parallel to the normal direction of the light guide plate 100.
- Another object of the present invention is to provide a backlight module which has a simple structure, high light intensity, and good illumination.
- the present invention provides a light guide plate, comprising: a bottom surface, a top surface disposed opposite to the bottom surface; and a plurality of side surfaces disposed between the bottom surface and the top surface, wherein the plurality of side surfaces include a light incident surface
- the bottom surface is provided with a plurality of mesh points having a right-angled triangular cross section.
- the mesh dots are formed by recessing the bottom surface of the light guide plate toward the top surface.
- the mesh dots have a sloped surface facing the light incident surface, and the inclined surface is gradually disposed from the bottom surface toward the light incident surface.
- the slope of the dot forms an angle with the bottom surface of the light guide plate, and the angle of the angle is between 40° and 50 degrees. between.
- the dots are formed on the bottom surface of the light guide plate by embossing or engraving.
- the dot has a straight face away from the light incident surface, the straight face being perpendicular to the bottom surface.
- the present invention further provides a backlight module, including: a back plate, a light guide plate disposed in the back plate, and a backlight disposed in the back plate, wherein the light guide plate includes a bottom surface, a top surface disposed opposite to the bottom surface, and a plurality of sides between the bottom surface and the top surface, wherein the plurality of side surfaces comprise a light incident surface, wherein the bottom surface is provided with a plurality of mesh points having a right-angled triangular cross section, wherein the mesh dots are formed by recessing the bottom surface of the light guide plate toward the top surface, The dot has a slope facing the light entrance surface, and the slope is disposed from the bottom surface upwardly away from the light incident surface.
- the slope of the dot forms an angle with the bottom surface of the light guide plate, and the angle of the angle is between 40° and 50 degrees. between.
- the dots are formed on the bottom surface of the light guide plate by embossing or engraving.
- the dot has a straight face away from the light incident surface, the straight face being perpendicular to the bottom surface.
- the backplane includes a bottom plate and a plurality of side plates connected to the bottom plate, wherein the backlight is mounted on the side plate of the back plate corresponding to the light incident surface of the light guide plate; and a heat sink is further disposed between the backlight and the side plate.
- the backlight is attached to the heat sink by a heat-dissipating adhesive, and the heat sink is fixedly mounted on the side plate by screwing or gluing; the backlight is a linear LED light bar.
- the present invention also provides a light guide plate, comprising: a bottom surface, a top surface disposed opposite to the bottom surface; and a plurality of side surfaces disposed between the bottom surface and the top surface, wherein the plurality of side surfaces include a light incident surface, wherein the bottom surface is provided There are a plurality of dots having a right-angled triangle, and the dots are recessed from the bottom surface of the light guide plate toward the top surface. Forming, the dot has a slope facing the light entrance surface, and the slope is gradually moved away from the bottom surface by the bottom surface;
- the inclined surface of the dot forms an angle with the bottom surface of the light guide plate, and the angle of the angle is between
- the dot is formed on the bottom surface of the light guide plate by embossing or engraving; wherein the dot has a straight surface away from the light incident surface, and the straight surface is perpendicular to the bottom surface.
- the light guide plate of the present invention and the backlight module using the light guide plate have a right-angled triangular HJ trap point on the bottom surface of the light guide plate, and the light emitted by the backlight is incident on the light guide plate from the light incident surface of the light guide plate. Inside, the reflection of the dot is emitted from the light exit surface of the light guide plate, and the energy of the light is mostly concentrated in the normal direction of the light guide plate, thereby effectively improving the light utilization efficiency.
- 1 is a schematic diagram of light propagation of a conventional light guide plate
- FIG. 2 is a distribution diagram of an outgoing light energy of a conventional light guide plate
- FIG. 3 is a schematic diagram of light propagation of a light guide plate of the present invention.
- FIG. 4 is a light distribution diagram of an outgoing light of a light guide plate of the present invention.
- FIG. 5 is a schematic structural view of a backlight module of the present invention. detailed description
- the present invention provides a light guide plate 2 including: a bottom surface 22 , a top surface 24 disposed opposite the bottom surface 22 , and a plurality of side surfaces 26 disposed between the bottom surface 22 and the top surface 24 , the number A side surface 26 includes a light incident surface 260.
- the bottom surface 22 is provided with a plurality of mesh dots 220 having a right-angled triangular cross section.
- the mesh dots are formed by the bottom surface 22 of the light guide plate 2 toward the top surface 24.
- the mesh dots 220 are formed on the light guide plate by embossing or engraving. 2 on the bottom surface 22.
- the dot 220 has a slope 222 facing the light incident surface 260, and the slope 222 is formed by the bottom surface. 22 is gradually disposed away from the light incident surface 260.
- the inclined surface 222 of the mesh point 220 forms an angle ⁇ with the bottom surface 22 of the light guide plate 2.
- the angle ⁇ angle is between 40° and 50°.
- the dot 220 also has a straight face 224 that is remote from the light incident surface 260, the straight face 224 being perpendicular to the bottom face 22.
- FIG. 4 is a distribution diagram of the emitted light energy of the light guide plate of the present invention. As can be seen from FIG. 4, most of the energy of the light emitted by the light guide plate 2 of the present invention is concentrated in the normal direction of the light guide plate 2, thereby effectively improving the light. Utilization rate.
- the present invention further provides a backlight module, including: a back plate 4, a light guide plate 2 disposed in the back plate 4, and a backlight 6 disposed in the back plate 4.
- the light guide plate 2 includes a bottom surface 22, a top surface 24 disposed opposite the bottom surface 22, and a plurality of side surfaces 26 disposed between the bottom surface 22 and the top surface 24.
- the plurality of side surfaces 26 include a light incident surface 260.
- the bottom surface 22 is provided with a plurality of mesh dots 220 having a right-angled triangular cross section.
- the mesh dots 220 are formed by the bottom surface 22 of the light guide plate 2 toward the top surface 24.
- the mesh dots 220 are formed by embossing or engraving.
- the mesh point 220 has a slope 222 facing the light incident surface 260.
- the slope surface 222 is gradually disposed away from the light incident surface 260 by the bottom surface 22.
- the slope 222 of the mesh point 220 forms an angle with the bottom surface 22 of the light guide plate 2, Preferably, the angle ⁇ angle is between 40° and 50°.
- the dot 220 also has a straight face 224 that is remote from the light incident surface 260, the straight face 224 being perpendicular to the bottom face 22.
- the backlight 6 is a linear LED strip, and the light emitted from the light-incident surface 260 of the light guide plate 2 enters the light guide plate 2, and is reflected by the top surface 24 of the light guide plate 2 through the reflection of the inclined surface 222 of the mesh point 220, so that the light is emitted. Most of the energy is concentrated in the normal direction of the light guide plate 2, thereby effectively improving the light utilization efficiency.
- the backplane 4 includes a bottom plate 42 and a plurality of side plates 44 connected to the bottom plate 42.
- the backlight 6 is mounted on the side plate 44 of the back plate 4 corresponding to the light incident surface 260 of the light guide plate 2.
- the backlight A heat sink 64 is further disposed between the source 6 and the side plate 44.
- the backlight 6 is attached to the heat sink 64 by a heat dissipating adhesive (not shown).
- the heat sink 64 is fixed by screw locking or gluing. Mounted on the side panel 44 of the backboard 4.
- the backlight module further includes a reflective sheet 8 disposed between the bottom plate 42 of the back plate 4 and the bottom surface 22 of the light guide plate 2, and an optical film set 10 disposed on the top surface 24 of the light guide plate 2, and the backlight
- the light emitted by the source 6 is directly or reflected by the reflection sheet 8 and enters the light guide plate 2 to provide light. Take a uniform surface light source.
- FIG. 4 is a distribution diagram of the emitted light energy of the light guide plate of the present invention. As can be seen from FIG. 4, most of the energy of the light emitted by the light guide plate 2 of the present invention is concentrated in the normal direction of the light guide plate 2, thereby effectively improving the light. Utilization rate.
- the light guide plate of the present invention and the backlight module using the light guide plate are provided with a right-angled triangular HJ trap point on the bottom surface of the light guide plate, and the light emitted by the backlight is incident on the light guide plate through the light incident surface of the light guide plate.
- the reflection from the dot is emitted from the light-emitting surface of the light guide plate, and the energy of the light is mostly concentrated in the normal direction of the light guide plate, thereby effectively improving the light utilization efficiency.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Planar Illumination Modules (AREA)
Abstract
一种导光板(2)包括:底面(22)、与底面(22)相对设置的顶面(24)及设于底面(22)与顶面(24)之间的数个侧面(26),该数个侧面(26)中包括一入光面(260),所述底面(22)上设有数个截面为直角三角形的网点(220),该些网点(220)由导光板底面(22)朝向顶面(24)凹陷形成,所述网点(220)具有一朝向入光面(260)的斜面(222),该斜面(222)由底面(22)向上逐渐远离入光面(260)设置。还披露了利用该导光板(2)的背光模组。该导光板(2)及用该导光板(2)的背光模组,通过在导光板(2)底面(22)上设置直角三角形的凹陷网点(220),光线由导光板(2)的入光面(260)射入导光板(2)内,经网点(220)反射从导光板(2)的顶面(24)射出,光线的能量大部分集中于导光板(2)的法向方向上,进而有效提高光线利用率。
Description
导光板及用该导光板的背光模组 技术领域
本发明涉及液晶显示领域, 尤其涉及一种导光板及用该导光板的背光 模组。 背景技术
液晶显示装置 (LCD, Liquid Crystal Display )具有机身薄、 省电、 无 辐射等众多优点, 得到了广泛的应用。 现有市场上的液晶显示装置大部分 为背光型液晶显示器, 其包括液晶面板及背光模组(backlight module ) 。 液晶面板的工作原理是在两片平行的玻璃当中放置液晶分子, 两片玻璃中 间有许多垂直和水平的细小电线, 通过通电与否来控制液晶分子改变方 向, 将背光模组的光线折射出来产生画面。 由于液晶面板本身不发光, 需 要借由背光模组提供的光源来正常显示影像, 因此, 背光模组成为液晶显 示装置的关键组件之一。 背光模组依照光源入射位置的不同分成侧入式背 光模组与直下式背光模组两种。 直下式背光模组是将发光光源例如 CCFL(Cold Cathode Fluorescent Lamp , 阴极萤光灯管)或 LED(Light Emitting Diode发光二极管)设置在液晶面板后方, 直接形成面光源提供给 液晶面板。 而侧入式背光模组是将发光光源 LED 灯条(lightbar )设于液 晶面板侧后方的背板边缘, LED灯条发出的光线从导光板一侧的入光面进 入导光板, 经反射和扩散后从导光板出光面出射, 以形成面光源提供给液 晶面板。
为了增加光照均勾度及光照强度, 一般在导光板底面上设置网点, 该 些网点的作用就是改变光线的传播方向, 目前网点的制作方法主要包括油 墨印刷、 机械雕刻、 化学腐蚀、 模具注塑等。
如图 1及 2所示, 现有的导光板 100其底面 102的网点 300的反射面 302与导光板 100的底面 102平行, 光源 500位于导光板 100的一侧, 其 发出的光线射到网点 300的反射面 302上发生全反射, 然后从导光板 100 的出光面 304射出。 其出射光线的空间分布不是以导光板 100的法线方向 对称, 光线的能量最大的方向不是导光板 100 的法线方向, 而是与法线方 向呈一较大夹角 β的方向, 导致光线利用率较小, 需要在导光板 100上增 加扩散片来矫正出射光线的方向, 让光线能量最大的方向与导光板 100法 线方向平行。
发明内容
本发明的目的在于提供一种导光板, 其底部网点可使出射光线的能量 大部分集中于导光板的法向方向上, 有效提高光线利用率。
本发明的另一目的在于提供一种背光模组, 其结构简单, 光照强度 高, 且光照均勾度好。
为实现上述目的, 本发明提供一种导光板, 包括: 底面、 与底面相对 设置的顶面及设于底面与顶面之间的数个侧面 , 该数个侧面中包括一入光 面, 所述底面上设有数个截面为直角三角形的网点, 该些网点由导光板底 面朝向顶面凹陷形成, 所述网点具有一朝向入光面的斜面, 该斜面由底面 向上逐渐远离入光面设置。
所述网点的斜面与导光板的底面形成一夹角, 该夹角角度介于 40° ~ 50。之间。
所述网点通过压印或雕刻的方式形成于导光板的底面上。
该网点具有一远离入光面的直面, 该直面与底面垂直。
本发明还提供一种背光模组, 包括: 背板、 设于背板内的导光板及设 于背板内的背光源, 所述导光板包括底面、 与底面相对设置的顶面及设于 底面与顶面之间的数个侧面, 该数个侧面中包括一入光面, 所述底面上设 有数个截面为直角三角形的网点, 该些网点由导光板底面朝向顶面凹陷形 成, 所述网点具有一朝向入光面的斜面, 该斜面由底面向上逐渐远离入光 面设置。
所述网点的斜面与导光板的底面形成一夹角, 该夹角角度介于 40° ~ 50。之间。
所述网点通过压印或雕刻的方式形成于导光板的底面上。
该网点具有一远离入光面的直面, 该直面与底面垂直。
所述背板包括底板及连接底板的数个侧板, 所述背光源对应导光板的 入光面安装于背板的侧板上; 所述背光源与侧板之间还设有散热片, 所述 背光源通过散热胶贴合于散热片上, 所述散热片通过螺钉锁合或胶粘方式 固定安装于侧板上; 所述背光源为线性 LED灯条。 的光学膜片组。 、 — ' 、 、 、 , '
本发明还提供一种导光板, 包括: 底面、 与底面相对设置的顶面及设 于底面与顶面之间的数个侧面, 该数个侧面中包括一入光面, 所述底面上 设有数个截面为直角三角形的网点, 该些网点由导光板底面朝向顶面凹陷
形成, 所述网点具有一朝向入光面的斜面, 该斜面由底面向上逐渐远离入 光面设置;
其中, 所述网点的斜面与导光板的底面形成一夹角, 该夹角角度介于
40° ~ 50°之间;
其中, 所述网点通过压印或雕刻的方式形成于导光板的底面上; 其中, 该网点具有一远离入光面的直面, 该直面与底面垂直。
本发明的有益效果: 本发明导光板及用该导光板的背光模组, 通过在 导光板底面上设置直角三角形的 HJ陷网点, 背光源发出的光线由导光板的 入光面射入导光板内, 经网点反射从导光板的出光面射出, 光线的能量大 部分集中于导光板的法向方向上, 进而有效提高光线利用率。
为了能更进一步了解本发明的特征以及技术内容, 请参阅以下有关本 发明的详细说明与附图, 然而附图仅提供参考与说明用, 并非用来对本发 明加以限制。 附图说明
下面结合附图, 通过对本发明的具体实施方式详细描述, 将使本发明 的技术方案及其它有益效果显而易见。
附图中,
图 1为现有的导光板的光线传播示意图;
图 2为现有的导光板的出射光线能量分布图;
图 3为本发明的导光板的光线传播示意图;
图 4为本发明导光板的出射光线能量分布图;
图 5为本发明背光模组的结构示意图。 具体实施方式
为更进一步阐述本发明所采取的技术手段及其效果, 以下结合本发明 的优选实施例及其附图进行详细描述。
请参阅图 3及图 4, 本发明提供一种导光板 2, 包括: 底面 22、 与底 面 22相对设置的顶面 24及设于底面 22与顶面 24之间的数个侧面 26, 该 数个侧面 26中包括一入光面 260。
所述底面 22上设有数个截面为直角三角形的网点 220, 该些网点由导 光板 2底面 22朝向顶面 24凹陷形成, 优选的, 所述网点 220通过压印或 雕刻的方式形成于导光板 2的底面 22上。
所述网点 220具有一朝向入光面 260的斜面 222, 该斜面 222由底面
22向上逐渐远离入光面 260设置, 所述网点 220的斜面 222与导光板 2的 底面 22形成一夹角 Θ , 优选的, 该夹角 Θ角度介于 40° ~ 50°之间。
所述网点 220还具有一远离入光面 260的直面 224 , 该直面 224与底 面 22垂直。
当光线由入光面 260进入导光板 2后, 经由网点 220斜面 222的反射 由导光板 2的顶面 24射出, 使得光线的能量大部分集中于导光板 2的法 向方向上, 进而有效提高光线利用率。
请参阅图 4, 为本发明导光板的出射光线能量分布图, 由图 4可知, 由本发明的导光板 2射出的光线的能量大部分集中于导光板 2的法向方向 上, 进而有效提高光线利用率。
请参阅图 3 至图 5 , 本发明还提供一种背光模组, 包括: 背板 4、 设 于背板 4内的导光板 2及设于背板 4内的背光源 6。
所述导光板 2包括底面 22、 与底面 22相对设置的顶面 24及设于底面 22与顶面 24之间的数个侧面 26, 该数个侧面 26中包括一入光面 260。
所述底面 22上设有数个截面为直角三角形的网点 220, 该些网点 220 由导光板 2底面 22朝向顶面 24凹陷形成, 优选的, 所述网点 220通过压 印或雕刻的方式形成于导光板 2的底面 22上。
所述网点 220具有一朝向入光面 260的斜面 222 , 该斜面 222由底面 22向上逐渐远离入光面 260设置, 所述网点 220的斜面 222与导光板 2的 底面 22形成一夹角 Θ , 优选的, 该夹角 Θ角度介于 40° ~ 50°之间。
所述网点 220还具有一远离入光面 260的直面 224 , 该直面 224与底 面 22垂直。
所述背光源 6为线性 LED灯条, 其发出的光线由导光板 2 的入光面 260进入导光板 2后, 经由网点 220斜面 222的反射由导光板 2的顶面 24 射出, 使得光线的能量大部分集中于导光板 2 的法向方向上, 进而有效提 高光线利用率。
所述背板 4包括底板 42及连接底板 42的数个侧板 44 , 所述背光源 6 对应导光板 2的入光面 260安装于背板 4的侧板 44上, 优选的, 所述背 光源 6与侧板 44之间还设有散热片 64 , 所述背光源 6通过散热胶(未图 示)贴合于散热片 64上, 所述散热片 64通过螺钉锁合或胶粘方式固定安 装于背板 4的侧板 44上。
值得一提的是, 所述背光模组还包括设于背板 4底板 42 与导光板 2 底面 22之间的反射片 8及设于导光板 2顶面 24上的光学膜片组 10, 背光 源 6发出的光线直接或经由反射片 8反射后进入导光板 2内, 进而提供光
照均匀的面光源。
请参阅图 4, 为本发明导光板的出射光线能量分布图, 由图 4可知, 由本发明的导光板 2射出的光线的能量大部分集中于导光板 2的法向方向 上, 进而有效提高光线利用率。
综上所述, 本发明导光板及用该导光板的背光模组, 通过在导光板底 面上设置直角三角形的 HJ陷网点, 背光源发出的光线由导光板的入光面射 入导光板内, 经网点反射从导光板的出光面射出, 光线的能量大部分集中 于导光板的法向方向上, 进而有效提高光线利用率。
以上所述, 对于本领域的普通技术人员来说, 可以根据本发明的技术 方案和技术构思作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。
Claims
1、 一种导光板, 包括: 底面、 与底面相对设置的顶面及设于底面与 顶面之间的数个侧面, 该数个侧面中包括一入光面, 所述底面上设有数个 截面为直角三角形的网点, 该些网点由导光板底面朝向顶面凹陷形成, 所 述网点具有一朝向入光面的斜面, 该斜面由底面向上逐渐远离入光面设 置。
2、 如权利要求 1 所述的导光板, 其中, 所述网点的斜面与导光板的 底面形成一夹角, 该夹角角度介于 40° ~ 50°之间。
3、 如权利要求 1 所述的导光板, 其中, 所述网点通过压印或雕刻的 方式形成于导光板的底面上。
4、 如权利要求 1 所述的导光板, 其中, 该网点具有一远离入光面的 直面, 该直面与底面垂直。
5、 一种背光模组, 包括: 背板、 设于背板内的导光板及设于背板内 的背光源, 所述导光板包括底面、 与底面相对设置的顶面及设于底面与顶 面之间的数个侧面, 该数个侧面中包括一入光面, 所述底面上设有数个截 面为直角三角形的网点, 该些网点由导光板底面朝向顶面凹陷形成, 所述 网点具有一朝向入光面的斜面, 该斜面由底面向上逐渐远离入光面设置。
6、 如权利要求 5 所述的背光模组, 其中, 所述网点的斜面与导光板 的底面形成一夹角, 该夹角角度介于 40° ~ 50°之间。
7、 如权利要求 5 所述的背光模组, 其中, 所述网点通过压印或雕刻 的方式形成于导光板的底面上。
8、 如权利要求 5 所述的背光模组, 其中, 该网点具有一远离入光面 的直面, 该直面与底面垂直。
9、 如权利要求 5 所述的背光模组, 其中, 所述背板包括底板及连接 底板的数个侧板, 所述背光源对应导光板的入光面安装于背板的侧板上; 所述背光源与侧板之间还设有散热片, 所述背光源通过散热胶贴合于散热 片上, 所述散热片通过螺钉锁合或胶粘方式固定安装于侧板上; 所述背光 源为线性 LED灯条。
10、 如权利要求 9所述的背光模组, 还包括设于背板底板与导光板底 面之间的反射片及设于导光板顶面上的光学膜片组。
11、 一种导光板, 包括: 底面、 与底面相对设置的顶面及设于底面与 顶面之间的数个侧面, 该数个侧面中包括一入光面, 所述底面上设有数个
截面为直角三角形的网点, 该些网点由导光板底面朝向顶面凹陷形成, 所 述网点具有一朝向入光面的斜面, 该斜面由底面向上逐渐远离入光面设 置;
其中, 所述网点的斜面与导光板的底面形成一夹角, 该夹角角度介于
40° ~ 50°之间;
其中, 所述网点通过压印或雕刻的方式形成于导光板的底面上; 其中, 该网点具有一远离入光面的直面, 该直面与底面垂直。
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