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WO2013185366A1 - 导光板及应用该导光板的侧入式背光模组 - Google Patents

导光板及应用该导光板的侧入式背光模组 Download PDF

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Publication number
WO2013185366A1
WO2013185366A1 PCT/CN2012/077121 CN2012077121W WO2013185366A1 WO 2013185366 A1 WO2013185366 A1 WO 2013185366A1 CN 2012077121 W CN2012077121 W CN 2012077121W WO 2013185366 A1 WO2013185366 A1 WO 2013185366A1
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WO
WIPO (PCT)
Prior art keywords
light guide
guide plate
air isolation
light
backlight module
Prior art date
Application number
PCT/CN2012/077121
Other languages
English (en)
French (fr)
Inventor
黄建发
Original Assignee
深圳市华星光电技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 深圳市华星光电技术有限公司 filed Critical 深圳市华星光电技术有限公司
Priority to US13/579,032 priority Critical patent/US8727599B2/en
Publication of WO2013185366A1 publication Critical patent/WO2013185366A1/zh

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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
    • G02B6/0066—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 characterised by the light source being coupled to the light guide
    • G02B6/0068—Arrangements of plural sources, e.g. multi-colour light sources
    • 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
    • G02B6/0075—Arrangements of multiple light guides
    • G02B6/0078—Side-by-side arrangements, e.g. for large area displays

Definitions

  • the present invention relates to the field of backlight modules for liquid crystal displays, and more particularly to the design of light guide plates in side-lit backlight modules. 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 display devices, 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 substrates. There are many vertical and horizontal small wires between the two glass substrates, and the liquid crystal molecules are controlled to change direction by energization or not, and the light of the backlight module is refracted. Come out to produce the picture. Since the liquid crystal panel itself does not emit light, the light source provided by the backlight module is required to display the image normally. 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 backlight module and a direct-lit backlight module according to different incident positions of the light source.
  • an illuminating 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.
  • the side-lit backlight module has a backlight LED strip (Lightbar) disposed on the edge of the back panel behind the liquid crystal panel, and the light emitted by the LED strip is from the light guide surface of the light guide plate (LGP).
  • the light guide plate enters the light guide plate, is reflected and diffused, and is emitted from the light exit surface of the light guide plate, and is supplied to the liquid crystal display panel through the optical film group to form a surface light source.
  • the brightness partitioning and independent control of the backlight in the backlight module is the basis of local dimming, scanning 3D (3D scanning), and improved dynamic contrast and power saving.
  • the light diffusion of the light guide plate makes the local dimming, scanning 3D, and the dynamic contrast and power saving technologies are not effective.
  • the light guide plate is designed as a light guide plate with a microstructure.
  • the existing light guide plate with microstructure has poor optical isolation effect, low yield, poor mass productivity, and severe deformation after moisture absorption.
  • the cost is also more than 25% higher than the ordinary light guide plate. Summary of the invention
  • the object of the present invention is to provide a light guide plate, which realizes brightness division and region of the light guide plate
  • the brightness is independently controlled, and has high optical isolation, high yield, quantifiable production, and low cost.
  • Another object of the present invention is to provide a side-lit backlight module that achieves brightness division and area brightness independent control of the backlight module, and achieves high optical isolation at low cost.
  • the present invention provides a light guide plate having a plurality of air separation walls, through which the light guide plate is divided into a plurality of sections.
  • the air separation wall has an equal-width structure, and is extended upward from the bottom surface of the light guide plate, and has an open structure with one end open.
  • the light guide plate has a thickness of 4 mm, the air separation wall has a width of 0.2 mm to 1.5 mm, and a depth of 3 mm to 3.5 mm.
  • the air separation wall is an isosceles triangle structure, and extends from the bottom surface of the light guide plate to form an open structure with one end open.
  • the light guide plate has a thickness of 4 mm, the isosceles triangle height is 3 mm to 3.5 mm, and the apex angle is 8 to 15. .
  • the air separation wall has an equal width structure and is located inside the light guide plate and has a closed structure.
  • the light guide plate has a thickness of 4 mm, and the air separation wall has a width of 0.2 mm to 1.5 mm and a depth of 3 mm to 3.5 mm.
  • the air separation wall is an isosceles triangle structure and is located inside the light guide plate in a closed structure.
  • the light guide plate has a thickness of 4 mm, the isosceles triangle height is 3 mm to 3.5 mm, and the apex angle is 8 to 15. .
  • the invention also provides a light guide plate, wherein a plurality of air separation walls are disposed, and the light guide plate is divided into a plurality of partitions by the air separation wall;
  • the air separation wall has an equal-width structure, and is extended upward from the bottom surface of the light guide plate, and has an open structure with one end open;
  • the thickness of the light guide plate is 4 mm
  • the width of the air separation wall is 0.2 mm to 1.5 mm
  • the depth is 3 mm to 3.5 mm.
  • the present invention also provides a side-lit backlight module, comprising: a back plate, a backlight disposed in the back plate, a light guide plate disposed in the back plate corresponding to the backlight, and a reflection disposed on the bottom surface of the light guide plate And an optical film set disposed on a top surface of the light guide plate, wherein the light guide plate is provided with a plurality of air separation walls, and the light guide plate is divided into a plurality of partitions by the air separation wall.
  • the present invention provides a light guide plate and an edge-in type backlight module using the same, wherein the light guide plate is provided with an air separation wall between independent partitions, and the total reflection principle is used to control each injection independently.
  • the partitioned light is limited to the independent partition because it cannot pass through the air layer. Therefore, the brightness division and the area brightness independent control of the light guide plate are realized, and the optical isolation effect is high, the yield is high, the production can be quantized, and the cost is low;
  • the side-lit backlight module uses the light guide plate, The brightness division and the area brightness independent control of the side-entry backlight module are realized, and high optical isolation is realized at low cost.
  • FIG. 1 is a plan view of a first embodiment of a light guide plate of the present invention
  • Figure 2 is a left side view of Figure 1;
  • FIG. 3 is a schematic view showing the principle of total reflection of a light guide plate according to the present invention.
  • FIG. 4 is a schematic view showing total reflection of light in a light guide plate of the present invention.
  • Figure 5 is a left side view of the second embodiment of the light guide plate of the present invention.
  • Figure 6 is a left side view of the third embodiment of the light guide plate of the present invention.
  • Figure 7 is a left side view of a fourth embodiment of the light guide plate of the present invention.
  • FIG. 8 is a schematic structural view of a side-lit backlight module of the present invention. detailed description
  • the present invention provides a light guide panel 10 having a plurality of air isolation walls 14 through which the light guide panel 10 is divided into a plurality of partitions 16.
  • the number of air separation walls 14 is set correspondingly according to the number of required partitions 12.
  • the air separation wall 14 has an equal-width structure, and extends from the bottom surface of the light guide plate 10 to form an open structure with one end open. If the thickness of the light guide plate 10 is 4 mm, the air separation wall 14 has a width of 0.2 mm to 1.5 mm and a depth of 3 mm to 3.5 mm.
  • the air separation wall 14 is made by hot stamping technology, and the cutter mold is heated to melt the temperature of the light guide plate 10 (related to the material of the light guide plate 10), pressed into the light guide plate 10, and then gradually cooled and removed. Thereby, the air separation wall 14 is formed.
  • the guide The refractive index of the light plate 10 is 1.49, which can be calculated by the principle of total reflection.
  • the critical angle of the light emitted from the light guide plate 10 to the total reflection of the air is about 42°, and the light guide plate 10 and the air separation wall are ensured from the inside of the light guide plate 10 as long as it is ensured.
  • the angle of incidence of the light at the interface 14 is greater than 42. , the light will be totally reflected.
  • FIG. 3 which is a schematic diagram of total reflection of light in the light guide plate 10 . The light is incident on the light guide plate 10 from the side of the light guide plate 10 , and the maximum incident angle is 90°.
  • the angle of refraction is 42°, when the light is emitted from the interface between the light guide plate 10 and the air separation wall 14 with the extension of the light, the exit angle is 48°, which exceeds the critical angle of the light guide plate 10, and is emitted from the light-tight medium to the light. Sparse the medium, satisfy the total reflection condition, and cause total reflection.
  • an air isolation wall 14 is disposed between each two adjacent sections 16 of the light guide plate 10 such that light from the backlight 4 is directed from the partition 16 of the light guide plate 10 to the air separation wall 14. , due to the full emission, the light can not be emitted.
  • the light incident on the partition 16 of the light guide plate 10 can be confined between the interfaces of the two air separation walls 14, that is, within the partition 16, so that the light in one partition 16 cannot be emitted to the adjacent partition 16, thereby realizing
  • the light is isolated inside the light guide plate 10 by the partition 16 to form a good area optical isolation.
  • the present invention can partition the brightness of the light guide plate by the arrangement of the air separation wall 14, and achieve independent control of the brightness of the partition 16 region, has high optical isolation effect, high yield, can be quantitatively produced, and has low cost.
  • the air separation wall 14 is an isosceles triangle structure, and the bottom surface of the light guide plate 10 extends upwardly and is open at one end. structure. If the thickness of the light guide plate 10 is 4 mm, the height of the isosceles triangle is 3 mm to 3.5 mm, and the apex angle is 8. To 15°.
  • the air separation wall 14 is made by hot stamping technology, that is, the air layer is formed by using a mold, and when the mold is heated to a temperature at which the light guide plate 10 can be melted, the light guide plate 10 is pressed, and then the mold is gradually cooled. And taken out, thereby forming the air separation wall 14, .
  • the air separation wall 14" is of an equal width structure and is located inside the light guide plate 10" in a closed structure. If the thickness of the light guide plate 10" is 4 mm, the air separation wall 14" has a width of 0.2 mm to 1.5 mm and a depth of 3 mm to 3.5 mm.
  • the semi-finished product of the light guide plate 10 having the open air separation wall according to the first embodiment is produced by using the injection molding die, the semi-finished product of the light guide plate 10 is immersed in the liquid state after the raw material is melted, and controlled. The immersion depth is such that the light-shielding plate 10" semi-finished air separation wall 14 is closed to form the closed air separation wall 14" of the present embodiment.
  • the light guide plate 10" produced by this method has higher rigidity.
  • the air separation wall 14" is an isosceles triangle structure, and is located at the light guide plate 10, "inside, in a closed structure.
  • the light guide plate 10" has a thickness of 4 mm
  • the isosceles triangle height is 3 mm to 3.5 mm
  • the apex angle is 8. to 15.
  • This embodiment employs the same manufacturing method as the third embodiment.
  • the present invention further provides a side-lit backlight module, including: a backplane 2, a backlight 4 disposed in the backplane 2, and a light guide panel 10 disposed in the backplane 2 corresponding to the backlight; And a reflection sheet 6 provided on the bottom surface of the light guide plate 10 and an optical film group 8 disposed on the top surface of the light guide plate 10.
  • the side-lit backlight module of the present invention adopts the above-mentioned light guide plate 10 to realize independent control of brightness division and area brightness, thereby achieving high optical isolation at low cost.
  • the light guide plate 10 can also employ several other embodiments.
  • the present invention provides a light guide plate and an edge-in type backlight module using the same, wherein the light guide plate is provided with an air separation wall between independent partitions, and is controlled by a total reflection principle to be injected into each independent partition. Because the light cannot pass through the air layer, it is limited to the independent partition, thereby achieving independent control of the brightness division and the area brightness of the light guide plate, and has high optical isolation effect, high yield, quantifiable production, and relatively low cost.
  • the side-lit backlight module uses the light guide plate to realize brightness division and area brightness independent control of the side-entry backlight module, and achieve high optical isolation at low cost.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Planar Illumination Modules (AREA)

Abstract

提供一种导光板（10）及应用该导光板（10）的侧入式背光模组，所述导光板（10）设有数个空气隔离墙（14），通过该空气隔离墙（14）将导光板（10）划分为数个分区（16）。通过所述导光板（10）在独立分区（16）之间设置空气隔离墙（14），利用全反射原理控制射入每个独立分区（16）的光线因无法穿过空气层，而局限于该独立分区（16）内，从而实现了导光板（10）的亮度分区及区域亮度独立控制，并具有较高的光隔离效果，良率高，可量化生产，成本较低。所述侧入式背光模组应用该导光板（10），实现了侧入式背光模组的亮度分区及区域亮度独立控制，以低成本实现较高的光隔离度。

Description

导光板及应用该导光板的侧入式背光模组 技术领域
本发明涉及液晶显示器的背光模组领域， 尤其涉及侧入式背光模组中 的导光板的设计。 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 为背光型液晶显示装置， 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基板当中放置液晶分 子， 两片玻璃基板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零组件之一。 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背光源 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（LGP, Light Guide Plate )一侧的入光面进入导光板， 经反射和扩散 后从导光板出光面射出， 在经由光学膜片组， 以形成面光源提供给液晶显 示面板。
背光模组中背光的亮度分区以及独立控制是 local dimming (区域调 光） 、 scanning 3D ( 3D 扫描） 以及提升动态对比度、 节省功耗等方面技 术的基础。 传统的侧入光式背光模组中， 导光板对光的弥散使得 local dimming, scanning 3D 以及提升动态对比度、 节省功耗等技术效果不佳。 为克服上述缺点， 把导光板设计成带有微结构的导光板， 然而， 现有带有 微结构的导光板存在光隔离效果较差、 良率低、 量产性差以及吸湿后会弯 曲严重变形的缺陷， 其成本也比普通的导光板高 25%以上。 发明内容
本发明的目的在于提供一种导光板， 实现了导光板的亮度分区及区域 亮度独立控制， 并具有较高的光隔离效果， 良率高， 可量化生产， 成本较 低。
本发明的另一目的在于提供一种侧入式背光模组， 实现背光模组的亮 度分区及区域亮度独立控制， 以低成本实现较高的光隔离度。
为实现上述目的， 本发明提供一种导光板， 其上设有数个空气隔离 墙， 通过该空气隔离墙将导光板划分为数个分区。
所述空气隔离墙为等宽度结构， 自导光板底面向上延伸设置， 呈一端 开口的开放式结构。
所述导光板的厚度为 4mm, 空气隔离墙宽度为 0.2mm至 1.5mm, 深 度为 3mm至 3.5mm。
所述空气隔离墙为等腰三角形结构， 自导光板底面向上延伸设置， 呈 一端开口的开放式结构。
所述导光板厚度为 4mm, 所述等腰三角形高为 3mm至 3.5mm, 顶角 为 8° 至 15。 。
所述空气隔离墙为等宽度结构， 且位于导光板内部， 呈封闭式结构。 所述导光板厚度为 4mm, 所述空气隔离墙宽度为 0.2mm至 1.5mm, 深度为 3mm至 3.5mm。
所述空气隔离墙为等腰三角形结构， 且位于导光板内部， 呈封闭式结 构。
所述导光板厚度为 4mm, 所述等腰三角形高为 3mm至 3.5mm, 顶角 为 8° 至 15。 。
本发明还提供一种导光板， 其上设有数个空气隔离墙， 通过该空气隔 离墙将导光板划分为数个分区；
其中， 所述空气隔离墙为等宽度结构， 自导光板底面向上延伸设置， 呈一端开口的开放式结构；
其中， 所述导光板的厚度为 4mm , 空气隔离墙宽度为 0.2mm 至 1.5mm, 深度为 3mm至 3.5mm。
本发明还提供一种侧入式背光模组， 其包括： 背板、 设于背板内的背 光源、 对应于背光源设置于背板内的导光板、 及设于导光板底面的的反射 片、 及设于导光板顶面的光学膜片组， 所述导光板上设有数个空气隔离 墙， 通过该空气隔离墙将导光板划分为数个分区。
本发明的有益效果： 本发明提供一种导光板及应用该导光板的侧入式 背光模组， 所述导光板在独立分区之间设置空气隔离墙， 利用全反射原理 控制射入每个独立分区的光线因无法穿过空气层， 而局限于该独立分区 内， 从而实现了导光板的亮度分区及区域亮度独立控制， 并具有较高的光 隔离效果， 良率高， 可量化生产， 成本较低； 所述侧入式背光模组应用该 导光板， 实现了侧入式背光模组的亮度分区及区域亮度独立控制， 以低成 本实现较高的光隔离度。
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为本发明导光板第一实施例的俯视图；
图 2为图 1的左视图；
图 3为本发明导光板全反射原理示意图；
图 4为本发明导光板中的光线发生全反射示意图；
图 5为本发明导光板第二实施例的左视图；
图 6为本发明导光板第三实施例的左视图；
图 7为本发明导光板第四实施例的左视图；
图 8为本发明侧入式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 1及图 2, 本发明提供一种导光板 10, 其上设有数个空气隔 离墙 14, 通过该空气隔离墙 14将导光板 10划分为数个分区 16。 根据所 需分区 12的数量来相应设置空气隔离墙 14的数量。
在本实施例中， 所述空气隔离墙 14为等宽度结构， 自导光板 10底面 向上延伸设置， 呈一端开口的开放式结构。 如果导光板 10 的厚度为 4mm, 所述空气隔离墙 14 宽度为 0.2mm 至 1.5mm, 深度为 3mm 至 3.5mm。 所述空气隔离墙 14采用热压印技术制作而成， 将刀模加热至可以 融化导光板 10的温度时（与导光板 10材质有关） ， 压入导光板 10, 然后 逐渐冷却刀模并取出， 从而形成空气隔离墙 14。
以所述导光板 10采用 PMMA (聚甲基丙烯酸甲酯）制成为例， 该导 光板 10的折射率为 1.49, 由全反射原理可以算出， 光线从导光板 10出射 到空气发生全反射的临界角约为 42° , 则只要保证自导光板 10 内部射向 导光板 10与空气隔离墙 14界面的光线的入射角大于 42。 ， 光线就会发生 全反射。 请参阅图 3 , 其为光线在导光板 10内发生全反射的示意图， 光线 从导光板 10侧面入射到导光板 10, 其最大入射角为 90° , 该光线进入导 光板 10后其折射角为 42° , 随着光线的延伸， 光线从导光板 10与空气隔 离墙 14的界面出射时， 其出射角为 48° , 超过了该导光板 10的临界角， 而且是从光密介质射向光疏介质， 满足全反射条件， 发生全反射。
请参阅图 4, 利用该原理， 在导光板 10的每两相邻的分区 16之间设 有空气隔离墙 14, 使得背光源 4的光线从导光板 10的分区 16射向空气隔 离墙 14 时， 因发生全发射， 光线无法出射出去。 这样就可以把入射到导 光板 10分区 16的光线局限在两个空气隔离墙 14组成的界面之间， 即分 区 16内， 从而一个分区 16内的光线无法出射到相邻的分区 16, 实现了光 线在导光板 10内部按照分区 16隔离开来， 形成良好的区域光隔离。
因此， 本发明通过空气隔离墙 14 的设置可对导光板的亮度分区， 且 实现分区 16 区域亮度独立控制， 具有较高的光隔离效果， 良率高， 可量 化生产， 成本较低。
请参阅图 5 , 其为本发明的第二实施例， 在本实施例中， 所述空气隔 离墙 14，为等腰三角形结构， 自导光板 10，底面向上延伸设置， 呈一端开口 的开放式结构。 如果导光板 10，的厚度为 4mm, 所述等腰三角形高为 3mm 至 3.5mm, 顶角为 8。 至 15° 。 所述空气隔离墙 14，采用热压印技术制作 而成， 即使用模具制作空气层， 将刀模加热至可以融化导光板 10，的温度 时， 压入导光板 10，， 然后逐渐冷却刀模并取出， 从而形成空气隔离墙 14，。
请参阅图 6, 其为本发明的第三实施例， 在本实施例中， 所述空气隔 离墙 14"为等宽度结构， 且位于导光板 10"内部， 呈封闭式结构。 如果导光 板 10"的厚度为 4mm, 所述空气隔离墙 14"宽度为 0.2mm至 1.5mm, 深度 为 3mm至 3.5mm。 采用射出成型模具制作出具有第一实施例所述的开放 式空气隔离墙的导光板 10"半成品后， 再把该导光板 10"半成品浸没至导光 板 10"原材料融化后的液态中， 并控制浸没深度， 使其把导光板 10"半成品 的空气隔离墙 14封闭， 从而形成本实施例的封闭式空气隔离墙 14"。 使用 该方法制成的导光板 10"具有更高的刚性。
请参阅图 7 , 其为本发明的第四实施例， 本实施例中， 所述空气隔离 墙 14"，为等腰三角形结构， 且位于导光板 10，"内部， 呈封闭式结构。 如果 导光板 10"，的厚度为 4mm, 所述等腰三角形高为 3mm至 3.5mm, 顶角为 8。 至 15。 。 本实施例采用与第三实施例相同的制作方法。
请参阅图 8 , 本发明还提供一种侧入式背光模组， 包括： 背板 2、 设 于背板 2内的背光源 4、 对应于背光源设置于背板 2内的导光板 10、 及设 于导光板 10底面的的反射片 6、 及设于导光板 10顶面的光学膜片组 8。 本发明侧入式背光模组采用了上述的导光板 10, 实现其亮度分区及区域亮 度独立控制， 进而以低成本实现较高的光隔离度。 该导光板 10 也可以采 用其它几个实施例。
综上所述， 本发明提供一种导光板及应用该导光板的侧入式背光模 组， 所述导光板在独立分区之间设置空气隔离墙， 利用全反射原理控制射 入每个独立分区的光线因无法穿过空气层， 而局限于该独立分区内， 从而 实现了导光板的亮度分区及区域亮度独立控制， 并具有较高的光隔离效 果， 良率高， 可量化生产， 成本较低； 所述侧入式背光模组应用该导光 板， 实现了侧入式背光模组的亮度分区及区域亮度独立控制， 以低成本实 现较高的光隔离度。
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

权 利 要 求
1、 一种导光板， 其上设有数个空气隔离墙， 通过该空气隔离墙将导 光板划分为数个分区。
2、 如权利要求 1 所述的导光板， 其中， 所述空气隔离墙为等宽度结 构， 自导光板底面向上延伸设置， 呈一端开口的开放式结构。
3、 如权利要求 2所述的导光板， 其中， 所述导光板的厚度为 4mm, 空气隔离墙宽度为 0.2mm至 1.5mm, 深度为 3mm至 3.5mm。
4、 如权利要求 1 所述的导光板， 其中， 所述空气隔离墙为等腰三角 形结构， 自导光板底面向上延伸设置， 呈一端开口的开放式结构。
5、 如权利要求 4所述的导光板， 其中， 所述导光板的厚度为 4mm, 所述等腰三角形高为 3mm至 3.5mm, 顶角为 8。 至 15。 。
6、 如权利要求 1 所述的导光板， 其中， 所述空气隔离墙为等宽度结 构， 且位于导光板内部， 呈封闭式结构。
7、 如权利要求 6所述的导光板， 其中， 所述导光板的厚度为 4mm, 所述空气隔离墙宽度为 0.2mm至 1.5mm, 深度为 3mm至 3.5mm。
8、 如权利要求 1 所述的导光板， 其中， 所述空气隔离墙为等腰三角 形结构， 且位于导光板内部， 呈封闭式结构。
9、 如权利要求 8所述的导光板， 其中， 所述导光板的厚度为 4mm, 所述等腰三角形高为 3mm至 3.5mm, 顶角为 8。 至 15。 。
10、 一种导光板， 其上设有数个空气隔离墙， 通过该空气隔离墙将导 光板划分为数个分区；
其中， 所述空气隔离墙为等宽度结构， 自导光板底面向上延伸设置， 呈一端开口的开放式结构；
其中， 所述导光板的厚度为 4mm , 空气隔离墙宽度为 0.2mm 至 1.5mm, 深度为 3mm至 3.5mm。
11、 一种侧入式背光模组， 包括： 背板、 设于背板内的背光源、 对应 于背光源设置于背板内的导光板、 及设于导光板底面的的反射片、 及设于 导光板顶面的光学膜片组， 所述导光板上设有数个空气隔离墙， 通过该空 气隔离墙将导光板划分为数个分区。
PCT/CN2012/077121 2012-06-12 2012-06-19 导光板及应用该导光板的侧入式背光模组 WO2013185366A1 (zh)

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