WO2015070468A1 - 导光板与应用所述导光板的侧入式背光模块 - Google Patents

导光板与应用所述导光板的侧入式背光模块 Download PDF

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Publication number
WO2015070468A1
WO2015070468A1 PCT/CN2013/087373 CN2013087373W WO2015070468A1 WO 2015070468 A1 WO2015070468 A1 WO 2015070468A1 CN 2013087373 W CN2013087373 W CN 2013087373W WO 2015070468 A1 WO2015070468 A1 WO 2015070468A1
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Prior art keywords
light guide
guide plate
light
plate body
backlight module
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Ceased
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PCT/CN2013/087373
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English (en)
French (fr)
Inventor
贺虎
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TCL China Star Optoelectronics Technology Co Ltd
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Shenzhen China Star Optoelectronics Technology Co Ltd
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Priority to US14/232,908 priority Critical patent/US9279930B2/en
Publication of WO2015070468A1 publication Critical patent/WO2015070468A1/zh
Anticipated expiration legal-status Critical
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    • 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
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0058—Means for improving the coupling-out of light from the light guide varying in density, size, shape or depth along the light guide
    • 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
    • G02B6/0073—Light emitting diode [LED]
    • 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 invention relates to the field of backlight modules of liquid crystal displays, a light guide plate and a side-entry backlight module using the light guide plates.
  • 3D display function has gradually become the mainstream.
  • the common 3D display mode has a shutter type (Shutter). Glass), polarized (FPR, Film-type Patterned Retarder) and other methods.
  • Shutter type 3D need to pass the scanning backlight (Scanning Backlight) is implemented with a panel pixel scan.
  • the backlight is usually partitioned, a side-lit LED strip (light Bar) is divided into multiple partitions.
  • first signal of the panel scans the first partition, the LED of the first partition is illuminated, and the remaining partitions are closed; when the panel signal is scanned to the second partition, only the LED of the second partition is Light up, and so on. This is required for each picture.
  • the effect of shutter-type 3D display is caused by crosstalk between partitions (cross Talk) and timing design.
  • Crosstalk between backlight partitions mainly comes from the influence of brightness between different partitions. The best state is that when one partition is lit, the backlights of other partitions are dark.
  • 1 is a side view of a light guide plate having a microstructure on a light-emitting surface in the prior art.
  • the provision of the serrated microstructures 13 on the light exit surface 11 of the light guide plate 10 is a common design.
  • the microstructures 13 on the light guide plate destroy the total reflection condition of the light by different geometries.
  • 2 is a schematic view of a light guide plate of a prior art and a light guide plate having a wavy microstructure. It can be clearly seen from Fig. 2 that the light guide plate having the wavy microstructure 13 on the right side is obviously more convergent than the light guide plate on the left side, but in practice, only the microstructure 13 is provided to completely suppress the divergence of light.
  • FIG. 3 a luminance distribution diagram of a light distribution of a light guide plate having an upper microstructure generally in a vertical direction when the partition is lit. That is, at the bright point (the position where the brightness is 100%), the corresponding width is a point, and the width corresponding to the FWHM (the position of the brightness of 50%) is significantly increased.
  • FIG. 4 there is shown a schematic diagram of the variation of the width corresponding to 1/2 brightness at different positions in FIG.
  • the half-width and height-increasing tendency tends to increase as the distance increases, that is, the crosstalk on the high-beam side of the light guide plate with one-side short-side light entering is lighter than that on the light-incident side.
  • FIG. 5 is a top view showing a structure of a backlight module of a common technology.
  • a backlight module 20 includes a first LED strip 23, a second LED strip 24, and a light guide body 21.
  • the light guide plate body 21 is divided into a plurality of elongated sections (R1-R4) perpendicular to the first LED light bar according to a predetermined scanning mode.
  • the meaning of the partition is that both the first LED strip 23 and the second LED strip 24 have a plurality of LED light sources.
  • the LED light source of the first LED light bar 23 can be divided into a plurality of group LED light sources, and each group LED light source corresponds to each of the partitions R1-R4 of the light guide plate body 21.
  • Each of the group of LED light sources of the first LED strip 23 can be individually turned on or off, and the second LED strips 24 have the same configuration. By illuminating the setting of a certain group of LED light sources separately, it is achieved that the light guide plate body 21 is illuminated by the partition. However, crosstalk can occur at the junction of the partitions.
  • the backlight module 20 is formed with a plurality of circular dots 22 on the light guide plate body 21, the dots 22 are equally spaced, and the light type is controlled by the size change of the circular dots 22 The degree of divergence.
  • FIG. 6 is a top plan view of another conventional backlight module structure.
  • the backlight module 30 includes a first LED strip 33, a second LED strip 34, and a light guide body 31.
  • the difference from FIG. 5 is that there are a plurality of elongated mesh dots 32 which are equally spaced, and the light type is controlled by the length change of the first LED light bar 33 parallel to the elongated mesh dots 32. The degree of divergence.
  • An object of the present invention is to provide a light guide plate and an edge-in type backlight module using the same, which avoids excessive divergence of the light type and generates crosstalk.
  • the invention provides a light guide plate, comprising: a light guide plate body, the light guide plate body has a light emitting surface and a lower surface with respect to the light exiting surface, and the light guide plate body is divided into a plurality of partitions according to a predetermined scanning mode.
  • the two opposite side edges of each of the partitions have a boundary line, and the adjacent partitions have a boundary line; a plurality of first network points are disposed on the partition of the light guide body; and a plurality of second network points, And disposed on the boundary line of the light guide body.
  • the second mesh point is disposed on at least one of the light emitting surface and the lower surface of the light guide plate body.
  • the second halftone dot is an elongated microstructure, and the microstructure is recessed in at least one of the upper surface and the lower surface of the light guide plate body.
  • the elongated microstructure has a depth of 20-200 ⁇ m, a width of 30-300 ⁇ m, and a length of 200-1200 Mm.
  • the long direction of the second halftone dot is parallel to the boundary line.
  • the present invention further provides an edge-lit backlight module using the light guide plate.
  • the backlight module includes: a light guide plate body having a first light incident surface, a second light incident surface opposite to the first light incident surface, and the first light incident surface and the second light incident surface.
  • the light-emitting surface and the first light-incident surface and the second light-incident surface are adjacent to each other and are opposite to the lower surface of the light-emitting surface, and are divided into a plurality of partitions according to a predetermined scanning mode, and two opposite side edges between each of the partitions Each has a boundary line, and the adjacent partitions have a boundary line;
  • a first LED light bar is disposed on the first light incident surface of the light guide plate body; and a plurality of first mesh points are disposed on the light guide plate body a plurality of second mesh points disposed on the boundary line of the light guide plate body.
  • the second mesh point is disposed on at least one of the light emitting surface and the lower surface of the light guide plate body.
  • the second halftone dot is an elongated microstructure, and the microstructure is recessed in at least one of the light emitting surface and the lower surface of the light guide plate body.
  • the elongated microstructure has a depth of 20-200 ⁇ m, a width of 30-300 ⁇ m, and a length of 200-1200 Mm.
  • the long direction of the second halftone dot is parallel to the boundary line.
  • the backlight module further has a second LED strip disposed on the second light incident surface of the light guide body.
  • the beneficial technical effect produced is that the crosstalk between the partitions can be effectively reduced, and the display effect of the shutter type 3D is improved.
  • FIG. 1 is a side view of a light guide plate having a microstructure on a light-emitting surface in the prior art.
  • FIG. 2 is a schematic view of a light guide plate of a prior art and a light guide plate having a wavy microstructure.
  • FIG. 3 is a diagram showing the luminance distribution of the light distribution of the light guide plate having the upper microstructure in the vertical direction when the partition is lit.
  • FIG. 4 is a schematic diagram showing changes in width corresponding to 1/2 brightness at different positions in FIG. 3 as a function of distance.
  • FIG. 5 is a top view showing a structure of a backlight module of a common technology.
  • FIG. 6 is a top plan view of another conventional backlight module structure.
  • Figure 7 is a plan view of a light guide plate in a first preferred embodiment of the present invention.
  • Figure 8 is a side elevational view of a light guide plate in a first preferred embodiment of the present invention.
  • FIG. 9 is a schematic structural diagram of a network point in the first embodiment of the present invention.
  • FIG. 10 is a schematic diagram of a dot structure for a light reflection path according to a first embodiment of the present invention.
  • FIG. 11 is a top plan view showing a structure of a backlight module according to a second embodiment of the present invention.
  • Figure 12 is a plan view showing the structure of a backlight module according to a third embodiment of the present invention.
  • FIG. 13 is a plan view showing the structure of a backlight module according to a fourth embodiment of the present invention.
  • Figure 7 is a plan view of a light guide plate in a first preferred embodiment of the present invention
  • Figure 8 is a side view of a light guide plate in a first preferred embodiment of the present invention.
  • the light guide plate 100 includes a light guide body 110, a plurality of first dots 150, and a plurality of second dots 152.
  • the setting of the two kinds of dots has a good effect on reducing crosstalk, which will be described in detail later.
  • the light guide plate body 110 has a first light incident surface 170, a second light incident surface 172 opposite to the first light incident surface, and a light exiting the first light incident surface 170 and the second light incident surface 172.
  • the surface 174 and the first light incident surface 170 and the second light incident surface 172 are adjacent to and opposite to the lower surface 176 of the light exit surface 174.
  • a first LED light bar (not shown) corresponding to the first light incident surface 170 includes a plurality of LED light source groups (not shown) that can be separately illuminated, and the LED light source is passed through
  • the light guide plate body 110 is divided into a plurality of elongated sections (R1-R4) along a direction perpendicular to the first light incident surface in a predetermined scanning mode, each partition Both opposite side edges of (R1-R4) have boundary lines (all of which are represented by L1), and adjacent partitions (R1-R4) share a boundary line L1.
  • the light exit surface 174 can have serrations, waves, or any suitable microstructure. In the present embodiment, the light exit surface 174 has a serrated microstructure.
  • the first mesh point 150 is disposed on the lower surface 176 of the light guide plate body 110, and the first mesh point 150 is implemented as a strip-shaped microstructure perpendicular to the boundary line L1, and is equally spaced. The manner is distributed over the entire area of the lower surface 176.
  • the second mesh point 152 is disposed on the lower surface 176 of the light guide plate body 110, and the second mesh point 152 is implemented as a strip-shaped microstructure parallel to the boundary line L1, and is equally spaced. The manner is distributed over the boundary line L1 of the lower surface 176.
  • FIG. 9 is a schematic structural diagram of a network point in the first embodiment of the present invention.
  • the light guide plate body 110 has a first mesh point 150 and a second mesh point 152 on the lower surface 176 and a common sawtooth microstructure on the upper surface 174.
  • the zigzag structure described herein is similar to the function of the previously mentioned wavy microstructures.
  • This sawtooth microstructure is for reference only and is not intended to limit the conventional microstructures of any type.
  • Each of the dots 150 or 152 in this embodiment is realized as an elongated concave microstructure.
  • the dots are recessed on the lower surface 176 of the light guide body 110.
  • the preferred size is a depth D of 20-200 ⁇ m, width W is 30-300 ⁇ m and length L is 200-1200 ⁇ m.
  • FIG. 10 is a schematic diagram of a dot structure for a light reflection path according to a first embodiment of the present invention.
  • the light 160 can be reflected on the dots 152 and still be perpendicular to the dots 150, that is, not damaged through the first light incident surface (not shown). The direction of the corrected light 160.
  • the second halftone dot 152 is disposed on the boundary line L1
  • the light 160 is greatly reduced across the adjacent partitions (R1-R4) of the track. Probability, which reduces crosstalk between partitions and provides better display.
  • the backlight module structure 200 basically includes the same light guide plate body 210 as the light guide plate body 110 of the first embodiment, and a first LED light bar 240 is additionally disposed.
  • the second halftone dots 252 disposed on the boundary line reflect light rays passing through the partitions (R1-R4), further concentrating light, and reducing divergence of light between the partitions. Crosstalk.
  • Figure 12 is a plan view showing the structure of a backlight module according to a third embodiment of the present invention.
  • the backlight module structure 300 basically includes the same light guide plate body 310 as the light guide plate body 210 of the second embodiment, and a second LED light bar 342 is additionally disposed.
  • the double-sided light-input mode backlight module has an LED light bar disposed on both sides, the first LED light, compared with the second embodiment of the present invention.
  • the crosstalk generated by the light of the strip 340 at a remote location may reduce the effect of crosstalk by setting the second LED strip 342; in contrast, the second LED strip 342
  • the crosstalk generated by the light at a remote location can also be relatively reduced, thereby achieving a better display.
  • FIG. 13 is a plan view showing the structure of a backlight module according to a fourth embodiment of the present invention.
  • the difference between the backlight module structure 400 and the third embodiment is that the first network dots 450 of different types are disposed.
  • the first network dots 450 of different sizes are used instead of the different lengths of the third embodiment.
  • a grid 350 has a better convergence effect for light within the partition than the third embodiment when configured for different LED strips.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Planar Illumination Modules (AREA)

Abstract

一种导光板，包括具有一出光面（174）和相对出光面（174）的下表面（176）的导光板本体（310）。按照预定扫描模式将导光板本体（310）划分为数个分区（R1，R2，R3，R4），每个分区（R1，R2，R3，R4）的两相对侧边缘皆具有边界线（L1），且相邻分区共有边界线（L1）；多个第一网点（350），设置于导光板本体（310）的分区上，以及多个第二网点（352），设置于导光板的分界线（L1）上。

Description

导光板与应用所述导光板的侧入式背光模块 技术领域
本发明涉及液晶显示器的背光模块领域，一种导光板与应用所述导光板的侧入式背光模块。
 背景技术
随着LED效率的提升，LED式背光源的设计以跟着改善，从最早期的四侧入光，双侧入光再到单侧入光，目前开发及未来发展的方向都将指向单侧短边入光方式。
另外随着3D技术的发展，具有3D显示功能也逐渐成为主流，目前常见的3D显示模式有快门式(Shutter Glass), 偏光式(FPR, Film-type Patterned Retarder)等方式。
快门式3D，需要通过扫描背光(Scanning Backlight)搭配面板(Panel)像素扫描来实现。背光源通常会进行分区，一条侧入式的LED灯条(light bar)被分成多个分区，当面板第一幅信号扫描第一分区时，第一分区的LED被点亮，其余分区关闭；当面板信号扫描到第二分区时，只有第二分区的LED被点亮，依此类推。每幅画面都需要进行这样的操作。快门式3D显示的效果由分区间的串扰(cross talk)及时序设计。
背光源分区间的串扰，主要来自于不同分区之间的亮度影响，最佳的状态为，某一分区点亮时，其余分区的背光源都呈现暗态。图1为现有技术中出光面具有微结构的导光板的侧视图。在导光板10的出光面11上设置锯齿状的微结构13为常见设计。导光板上的微结构13藉由不同的几何形状来破坏光的全反射条件。图2为现有技术中平板导光板与具有波浪状微结构导光板的光线示意图。由图2可明显发现右边具有波浪状微结构13的导光板明显有优于左边的平板导光板较为收敛的光线，但实作上，只设置微结构13是无法完全抑制光线的发散。
进一步参考图3为常见具有上微结构的导光板在分区点亮时的光线分布在竖直方向上的亮度分布图。即在发亮点(亮度100%的位置)其对应的宽度为一点，在FWHM(亮度50%的位置)所对应的宽度明显增加。再参考图4为图3中不同位置的1/2亮度所对应的宽度随着距离的变化示意图。在单侧短边入光方式中，呈现随着距离增大，半宽高变大的趋势，即单侧短边入光的导光板远光侧的串扰较入光侧严重。
图5为常见技术的背光模块结构俯视图。一背光模块20包括第一LED灯条23、第二LED灯条24以及导光板本体21。所述导光板本体21根据预定扫描模式划分为多个垂直所述第一LED灯条的长条形分区(R1-R4)。所述分区的意义在于，所述第一LED灯条23与所述第二LED灯条24皆具有多个LED光源。其中所述第一LED灯条23的所述LED光源可以区分为多个群组LED光源，各群组LED光源对应导光板本体21的各个分区R1-R4。所述第一LED灯条23的所述每一群组LED光源可以分别控制点亮或关闭，所述第二LED灯条24也有相同的配置。藉由上述可以单独点亮某一群组LED光源的设置，达成了分区点亮所述导光板本体21。然而，在分区交界处会发生串扰现象。
为了解决分区间的串扰，所述背光模块20在所述导光板本体21形成有多个圆形网点22，所述网点22为等间距，通过所述圆形网点22的大小变化来控制光型的发散程度。
图6为另一常见技术的背光模块结构俯视图。该背光模块30包括第一LED灯条33、第二LED灯条34以及导光板本体31。与图5的差异在于具有多个长条形网点32，所述长条形网点32为等间距，通过所述长条形网点32的平行所述第一LED灯条33长度变化来控制光型的发散程度。
然而另外还有通过相同网点大小，不同网点间距来控制光型的发散程度。然而即使使用含有上述三种网点的导光板，在分区之间依然存在一定的串扰，这是因为光线进入导光板本体后存在一定的发散角度，虽然有通过利用上述不同的网点配置方式，仍旧无法有效控制光线的收敛。
 技术问题
本发明的目的在于提供一种导光板与应用该导光板的一种侧入式背光模块，避免光型的过度发散而产生串扰。
 技术解决方案
本发明提供一种导光板，其中包括：一导光板本体，所述导光板本体具有一出光面以及相对于所述出光面的一下表面，按照预定扫描模式将所述导光板本体划分为数个分区，每个分区之间的两相对侧边缘皆具有边界线，且相邻分区共有边界线；多个第一网点，设置于所述导光板本体的所述分区上；及多个第二网点，设置于所述导光板本体的所述边界线上。
所述第二网点设置于所述导光板本体的所述出光面与所述下表面至少其中一者。
所述第二网点为一长条形微结构，所述微结构在所述导光板本体的所述上表面与所述下表面至少其中一者内凹。
所述长条形微结构的深度为20-200 μm, 宽度为30-300 μm以及长度为200-1200 μm。
所述第二网点的长方向平行于所述边界线。
为实现上述目的，本发明进一步提供一种应用该导光板的一种侧入式背光模块。其中所述背光模块包括：一导光板本体，具有第一入光面、相对于第一入光面的第二入光面、与所述第一入光面以及所述第二入光面邻接的出光面以及所述第一入光面以及所述第二入光面邻接并相对于所述出光面的下表面，按照预定扫描模式划分为数个分区，每个分区之间的两相对侧边缘皆具有边界线，且相邻分区共有边界线；第一LED灯条，设置于所述导光板本体的所述第一入光面；多个第一网点，设置于所述导光板本体的所述分区上；多个第二网点，设置于所述导光板本体的所述边界线。
所述第二网点设置于所述导光板本体的所述出光面与所述下表面至少其中一者。
所述第二网点为长条形微结构，所述微结构在所述导光板本体的所述出光面与下表面至少两者之一者内凹。
所述长条形微结构的深度为20-200 μm, 宽度为30-300 μm以及长度为200-1200 μm。
所述第二网点的长方向平行于所述边界线。
述背光模块进一步具有一第二LED灯条，设置于所述导光板本体的第二入光面。
 有益效果
通过本发明的上述技术方案，产生的有益技术效果在于，可以有效降低分区间的串扰，提升快门式3D的显示效果。
 附图说明
图1为现有技术中出光面具有微结构的导光板的侧视图。
图2为现有技术中平板导光板与具有波浪状微结构导光板的光线示意图。
图3为常见具有上微结构的导光板在分区点亮时的光线分布在竖直方向上的亮度分布图。
图4为图3中不同位置的1/2亮度所对应的宽度随着距离的变化示意图。
图5为常见技术的背光模块结构俯视图。
图6为另一常见技术的背光模块结构俯视图。
图7为本发明的第一优选实施例中导光板的俯视图。
图8为本发明的第一优选实施例中导光板的侧视图。
图9为本发明第一实施例中网点的结构示意图。
图10为本发明第一实施例的网点结构对于光线反射路径的示意图。
图11为本发明第二实施例的背光模块结构俯视图。
图12为本发明第三实施例的背光模块结构俯视图。
图13为为本发明第四实施例的背光模块结构俯视图。
 本发明的最佳实施方式
以下各实施例的说明是参考附加的图式，用以例示本发明可用以实施的特定实施例。本发明所提到的方向用语，例如「上」、「下」、「前」、「后」、「左」、「右」、「内」、「外」、「侧面」等，仅是参考附加图式的方向。因此，使用的方向用语是用以说明及理解本发明，而非用以限制本发明。
参考图7，图8。图7为本发明的第一优选实施例中导光板的俯视图，图8为本发明的第一优选实施例中导光板的侧视图。导光板100包括一导光板本体110、多个第一网点150以及多个第二网点152。通过设置所述两种网点对于降低串扰有良好的效果，会于后面详细说明。
所述导光板本体110具有第一入光面170、相对于第一入光面的第二入光面172、与所述第一入光面170以及所述第二入光面172邻接的出光面174以及所述第一入光面170以及所述第二入光面172邻接并相对于所述出光面174的下表面176。所述第一入光面170所对应的一第一LED灯条(未图示)包含可以分为多个可以单独点亮的LED光源群组(未图示)，通过与所述的LED光源群组(未图示)相对应而将所述导光板本体110照预定的扫描模式沿着垂直所述第一入光面的方向划分为数个长条形分区(R1-R4)，每个分区(R1-R4)的两相对侧边缘皆具有边界线(以L1代表所有的边界线)，且相邻分区(R1-R4)共有边界线L1。所述出光面174可具有锯齿、波浪或任何适当的微结构，在本实施例中，所述出光面174具有锯齿状的微结构。
所述第一网点150设置于所述导光板本体110的所述下表面176，且所述第一网点150的实现为长条型垂直于所述边界线L1的微结构，且以等间距的方式分布于所述下表面176的全部区域上。
所述第二网点152设置于所述导光板本体110的所述下表面176，且所述第二网点152的实现为长条型平行于所述边界线L1的微结构，且以等间距的方式分布于所述下表面176的所述边界线L1之上。
图9为本发明第一实施例中网点的结构示意图。说明该导光板本体110于所述下表面176具有第一网点150与第二网点152以及于所述上表面174具有常见的锯齿状微结构。请留意此处所述之锯齿状结构与先前提到的波浪状微结构的功用相似，此锯齿状微结构仅供参考之用，并不用以限制设置任何型态的习知微结构。本实施例中的各网点150或152实现为长条形的内凹微结构。所述网点在所述导光板本体110的所述下表面176上内凹。优选的大小是深度D为20-200 μm, 宽度W为30-300 μm以及长度L为200-1200 μm。
图10为本发明第一实施例的网点结构对于光线反射路径的示意图。透过所述网点152的长度、宽度以及深度的配置，可以使光线160在所述网点152上反射后仍然垂直于所述网点150，即不会破坏经由第一入光面(未图示)校正后光线160的方向。
本发明第一实施例与常见技术相较而言，由于在所述边界线L1上设置了所述第二网点152，因此大幅度的降低了光线160穿越道相邻分区(R1-R4)的机率，进而降低了分区间的串扰，提供了更佳的显示效果。
图11为本发明第二实施例的背光模块结构俯视图。根据本实施例，背光模块结构200基本上包含如第一实施例的导光板本体110相同的导光板本体210，并另外设置了一第一LED灯条240。通过使用与第一实施例中相同的导光板本体210，设置于所述边界线的所述第二网点252来反射跨越分区(R1-R4)的光线，进一步集中光线，降低分区间光线的发散、串扰。
图12为本发明第三实施例的背光模块结构俯视图。根据本实施例，背光模块结构300基本上包含如第二实施例的导光板本体210相同的导光板本体310，并另外设置了一第二LED灯条342。通过使用与第二实施例中相同的导光板本体310，此双侧入光模式背光模块与本发明的第二实施例相比，在双侧都有设置LED灯条，所述第一LED灯条340的光线在远程(靠近所述第二入光面372)产生的串扰，可以因为设置所述第二LED灯条342而降低串扰的影响；相对地，所述第二LED灯条342的光线在远程(靠近所述第一入光面370)产生的串扰也可相对地降低，进而达到更好的显示效果。
图13为为本发明第四实施例的背光模块结构俯视图。根据本实施例，背光模块结构400与第三实施例的差异在于设置不同型态的第一网点450，本实施例透过使用不同大小的第一网点450取代第三实施例中不同长度的第一网点350，在对应不同的LED灯条配置时，本实施例相较于第三实施例对于分区内的光线具有更佳的收敛效果。
综上所述，虽然本发明已以优选实施例揭露如上，但上述优选实施例并非用以限制本发明，本领域的普通技术人员，在不脱离本发明的精神和范围内，均可作各种更动与润饰，因此本发明的保护范围以权利要求界定的范围为准。
 本发明的实施方式
工业实用性
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Claims (13)

  1. 一种导光板，包括：
    一导光板本体，所述导光板本体具有一出光面以及相对于所述出光面的一下表面，所述导光板本体按照预定扫描模式划分为数个分区，每个分区的两相对侧边缘皆具有边界线，且相邻分区共有边界线；
    多个第一网点，设置于所述导光板本体的所述分区上；及
    多个第二网点，设置于所述导光板本体的所述边界线上, 所述第二网点为一长条形微结构，且所述微结构在所述导光板本体的所述出光面与所述下表面至少其中一者内凹,以及所述第二网点的长方向平行于所述边界线。
  2. 根据权利要求1所述之导光板，其中所述长条形微结构的深度为20-200 μm, 宽度为30-300 μm以及长度为200-1200 μm。
  3. 一种导光板，包括：
    一导光板本体，所述导光板本体具有一出光面以及相对于所述出光面的一下表面，所述导光板本体按照预定扫描模式划分为数个分区，每个分区的两相对侧边缘皆具有边界线，且相邻分区共有边界线；
    多个第一网点，设置于所述导光板本体的所述分区上；及
    多个第二网点，设置于所述导光板本体的所述边界线上。
  4. 根据权利要求3所述之导光板，其中所述第二网点设置于所述导光板本体的所述出光面与所述下表面至少其中一者。
  5. 根据权利要求4所述之导光板，其中所述第二网点为一长条形微结构，所述微结构在所述导光板本体的所述出光面与所述下表面至少其中一者内凹。
  6. 根据权利要求5所述之导光板，其中所述长条形微结构的深度为20-200 μm, 宽度为30-300 μm以及长度为200-1200 μm。
  7. 根据权利要求5所述之导光板，其中所述第二网点的长方向平行于所述边界线。
  8. 一种侧入式背光模块，所述背光模块包括：
    一导光板本体，具有第一入光面、相对于第一入光面的第二入光面、与所述第一入光面以及所述第二入光面邻接的出光面以及所述第一入光面以及所述第二入光面邻接并相对于所述出光面的下表面，按照预定扫描模式划分为数个分区，每个分区的两相对侧边缘皆具有边界线，且相邻分区共有边界线；
    第一LED灯条，设置于所述导光板本体的所述第一入光面；
    多个第一网点，设置于所述导光板本体的所述分区上；
    多个第二网点，设置于所述导光板本体的所述边界线。
  9. 根据权利要求8所述之侧入式背光模块，其中所述第二网点设置于所述导光板本体的所述出光面与所述下表面至少其中一者。
  10. 根据权利要求9所述之侧入式背光模块，其中所述第二网点为长条形微结构，所述微结构在所述导光板本体的所述上表面与下表面至少两者之一者内凹。
  11. 根据权利要求10所述之侧入式背光模块，其中所述长条形微结构的深度为20-200 μm, 宽度为30-300 μm以及长度为200-1200 μm。
  12. 根据权利要求10所述之侧入式背光模块，其中所述第二网点的长方向平行于所述边界线。
  13. 根据权利要求8所述之侧入式背光模块，其中所述侧入式背光模块进一步具有一第二LED灯条，设置于所述导光板本体的第二入光面。
PCT/CN2013/087373 2013-11-14 2013-11-19 导光板与应用所述导光板的侧入式背光模块 Ceased WO2015070468A1 (zh)

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