WO2015070452A1 - 一种背光模块 - Google Patents

一种背光模块 Download PDF

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Publication number
WO2015070452A1
WO2015070452A1 PCT/CN2013/087309 CN2013087309W WO2015070452A1 WO 2015070452 A1 WO2015070452 A1 WO 2015070452A1 CN 2013087309 W CN2013087309 W CN 2013087309W WO 2015070452 A1 WO2015070452 A1 WO 2015070452A1
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Prior art keywords
light
backlight module
module structure
guide plate
light guide
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PCT/CN2013/087309
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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 US14/232,910 priority Critical patent/US9229146B2/en
Publication of WO2015070452A1 publication Critical patent/WO2015070452A1/zh
Anticipated expiration legal-status Critical
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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133603—Direct backlight with LEDs

Definitions

  • the present invention relates to the field of backlight modules for liquid crystal displays, and more particularly to a light guide plate having arc-shaped protrusions on a light incident surface.
  • 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.
  • a common technique is to prevent a light-type divergence by forming a microstructure similar to a convex lens by the material of the light guide plate; however, while improving the effect of light concentration, the width and height of the microstructure are not favorable for backlighting.
  • the design of the structure is to prevent a light-type divergence by forming a microstructure similar to a convex lens by the material of the light guide plate; however, while improving the effect of light concentration, the width and height of the microstructure are not favorable for backlighting.
  • an object of the first embodiment of the present invention is to provide a backlight module structure, including: a light guide plate main body, the light guide plate main body has a light emitting surface, a lower surface relative to the light emitting surface, and Depicting a first light incident surface adjacent to the light surface and the lower surface, the first light incident surface having a plurality of arcuate protrusions; a plurality of transparent medium disposed on the arcuate protrusion; and a first LED strip And disposed on the first light incident surface of the light guide plate body, the LED light bar includes a plurality of LED light sources respectively corresponding to the arcuate protrusions.
  • the center of the arcuate projection is aligned with the center of the LED light source, and the thickness of the arcuate projection decreases from the center to both sides.
  • the thickness of the transparent medium decreases from the center of the corresponding arcuate protrusion to both sides.
  • the refractive index of the light guide plate body is greater than or equal to the transparent medium, and the transparent medium has a refractive index greater than that of air.
  • the light guide plate body further has a plurality of mesh points, and the mesh dots are disposed on at least one of the light emitting surface and the lower surface of the light guide plate main body.
  • the 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.
  • the elongated microstructure has a height of 20-200 ⁇ m, a width of 30-300 ⁇ m, and a length of 200-1200 Mm.
  • the long direction of the dots is parallel to the direction of the first LED strip.
  • the light guide plate further has a second light incident surface adjacent to the light exit surface and the lower surface and opposite to the first light incident surface, and the second light incident surface has the arcuate protrusion and has a
  • the transparent medium is disposed on the arcuate protrusion;
  • the backlight module further has a second LED strip disposed on the second light incident surface of the light guide body, the LED strip includes a plurality of LEDs The light sources respectively correspond to the arcuate protrusions.
  • the long direction of the dots is perpendicular to the direction of the first LED strip.
  • the beneficial technical effect is that the optical light type is corrected by the structural design of the light guide plate and the transparent medium with different thicknesses, and the light entering the light guide plate is effectively collected, thereby effectively reducing Cross-interval cross-section.
  • 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 and a light structure having a wavy microstructure in the prior art.
  • 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 partial structural diagram of a light guide plate of the present invention in a light incident surface corresponding to a single LED light source.
  • Fig. 6 is a plan view showing the structure of a backlight module according to a first embodiment of the present invention.
  • Figure 7 is a cross-sectional view taken along line A-A' of Figure 6.
  • FIG. 8 is a schematic structural diagram of a network point in the first embodiment of the present invention.
  • FIG. 9 is a schematic diagram of a dot structure for a light reflection path according to a first embodiment of the present invention.
  • Figure 10 is a plan view showing the structure of a second embodiment of the present invention.
  • Figure 11 is a plan view showing the structure of a third embodiment of the present invention.
  • FIG. 5 is a partial structural diagram of a light guide plate corresponding to a light incident surface of a single LED light source according to the present invention
  • FIG. 6 is a top view of a backlight module structure according to a first embodiment of the present invention, FIG. It is a sectional view along A-A' in Fig. 6.
  • the backlight module structure 100 includes a light guide body 110 and a first LED strip 140.
  • the light guide plate main body 110 has a light emitting surface 174 , a lower surface 176 opposite to the light emitting surface 174 , and a first light incident surface 170 adjacent to the light emitting surface 174 and the lower surface 176 .
  • the first light incident surface 170 has the arcuate protrusions 120 and has a plurality of transparent media 130 disposed on the arcuate protrusions 120.
  • the first LED light bar 140 includes a plurality of LED light sources 140a corresponding to the arcuate protrusions 120, respectively.
  • the center of the arcuate protrusion 120 is aligned with the center of the LED light source 142a, and the thickness of the arcuate protrusion 120 is decreased from the center to the sides; meanwhile, the thickness of the transparent medium 130 disposed on the surface of the arcuate protrusion 120 is corresponding to
  • the center of the arcuate protrusion 120 is decremented to form a structure similar to a convex lens, so that the light emitted from the LED light source can be first refracted through the transparent medium 130, and then transmitted through the first light incident surface 170.
  • the arcuate protrusions 120 are refracted a second time. Since the refractive index of the light guide plate main body 110 is greater than or equal to the transparent medium 130, and the refractive index of the transparent medium 130 is greater than air, the light can be concentrated more to avoid divergence of the light type.
  • the light guide plate body 110 further has a plurality of mesh points 150 disposed on the lower surface 176 of the light guide plate main body 110 and parallel to the first LED light bar 140 for destroying the reflection condition of the light. To avoid the divergence of the light type.
  • FIG. 8 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 mesh point 150 on the lower surface 176 and a common sawtooth microstructure on the upper surface 174. Please note that 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.
  • the dot 150 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. 9 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 dot 150 and still perpendicular to the dot 150, that is, not damaged through the first light incident surface (not shown).
  • the direction of the corrected light 160 is compared with the prior art.
  • the light guide plate of the present embodiment concentrates light by two-stage light refraction to reduce divergence and crosstalk of the light type.
  • Figure 10 is a plan view showing the structure of a second embodiment of the present invention.
  • the backlight module structure 200 is different from the first embodiment in that a second LED strip 242 is added, and an arc-shaped protrusion 220 and a corresponding transparent medium 230 are disposed on a second light-incident surface 272.
  • the double-sided light-input mode backlight module has a light strip on the two sides, and the light of the first LED strip 240 is remote (near the second light entering)
  • the crosstalk generated by face 272) may be affected by lower crosstalk due to the provision of the second LED strip 242; in contrast, the light of the second LED strip 242 is remote (near the first incident surface 270)
  • the resulting crosstalk can also be relatively reduced to achieve a better display.
  • Figure 11 is a plan view showing the structure of a third embodiment of the present invention.
  • the backlight module structure 300 differs from the second embodiment in that the light exit surface 374 is provided with a plurality of dots 350 of a strip-shaped microstructure perpendicular to the first LED strip.
  • the light-input mode backlight module has been experimentally found that because the light-emitting surface 374 is disposed on the light-emitting surface 374 perpendicular to the first LED strip, the partition is further made in each partition. Light has a better convergence effect.

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Planar Illumination Modules (AREA)

Abstract

一种背光模块结构（100），包括导光板主体（110），导光板主体（110）具有一出光面（174）、相对于所述出光面（174）的一下表面（176）、与所述出光面（174）和所述下表面（176）邻接的一入光面（170），所述入光面（170）具有数个弧状突起（120）；数个透明介质（130），设置在所述弧状突起（120）之上；以及一LED灯条（140），设置于所述导光板主体（110）的所述入光面（170），所述LED灯条（140）包括数个LED光源（140a）分别对应所述弧状突起（120）。

Description

一种背光模块 技术领域
本发明涉及液晶显示器的背光模块领域，尤其涉及一种在入光面具有弧状突起的导光板。
 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。
常见技术为藉由所述导光板自身材质形成一类似凸透镜的微结构来避免光型发散；然而在改善光线集中的效果的同时，会因为所述微结构增大的宽度以及高度而不利于背光结构的设计。
 技术问题
本发明的目的在于提供一种背光模块，避免光型的过度发散而产生串扰。
 技术解决方案
为实现上述目的，本发明第一实施例的目的在于提供一种背光模块结构，包括：一导光板主体，所述导光板主体具有一出光面、相对于所述出光面的一下表面、与所述出光面和所述下表面邻接的第一入光面，所述第一入光面具有数个弧状突起；数个透明介质，设置于所述弧状突起之上；以及一第一LED灯条，设置于所述导光板主体的所述第一入光面，所述LED灯条包括数个LED光源分别对应所述弧状突起。
所述弧状突起的中心与所述LED光源的中心对齐，所述弧状突起的厚度由中心往两旁递减。
所述透明介质的厚度从相对应的所述弧状突起的中心往两旁递减。
所述导光板主体的折射率大于等于所述透明介质，且所述透明介质的折射率大于空气。
所述导光板本体进一步具有数个网点，所述网点设置于所述导光板主体的所述出光面与所述下表面至少其中一者。
所述网点为长条形微结构，所述微结构在所述导光板的所述出光面与所述下表面至少其中一者内凹。
所述长条形微结构的高度为20-200 μm, 宽度为30-300 μm以及长度为200-1200 μm。
所述网点的长方向平行于所述第一LED灯条的方向。
所述导光板进一步具有与所述出光面和所述下表面邻接以及与所述第一入光面相对的一第二入光面，所述第二入光面具有所述弧状突起，具有所述透明介质，设置于所述弧状突起之上；所述背光模块进一步具有第二LED灯条，设置于所述导光板主体的所述第二入光面，所述LED灯条包括数个LED光源分别对应所述弧状突起。
在另一实施例中，所述网点的长方向垂直于所述第一LED灯条的方向。
 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，藉由导光板的结构设计及采用不等厚度的透明介质，实现对LED光型的校正，有效汇集进入导光板的光线，进而有效降低分区间的串扰。
 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微结构的光线示意图。
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为本发明的导光板在单一LED光源对应的入光面的部分结构示意图。
图6为本发明的第一实施例的背光模块结构俯视图。
图7为沿着图6中的A-A’的剖面图。
图8为本发明第一实施例中网点的结构示意图。
图9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10为本发明的第二实施例的结构俯视图。
图11为本发明的第三实施例的结构俯视图。
 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5、图6以及图7，图5为本发明的导光板在单一LED光源对应的入光面的部分结构示意图，图6为本发明的第一实施例的背光模块结构俯视图，图7为沿着图6中的A-A’的剖面图。根据本发明之第一实施例，背光模块结构100包含一导光板主体110、一第一LED灯条140。
所述导光板主体110具有一出光面174、相对于所述出光面174的一下表面176以及与所述出光面174和所述下表面176邻接的第一入光面170。在所述第一入光面170具有述个弧状突起120，并具有数个透明介质130设置于所述弧状突起120之上。
所述第一LED灯条140包括数个LED光源140a分别对应所述弧状突起120。
所述弧状突起120的中心与所述LED光源142a的中心对齐，所述弧状突起120的厚度由中心往两旁递减；同时，设置于所述弧状突起120表面的透明介质130的厚度从相对应的所述弧状突起120的中心往两旁递减形成一个近似于凸透镜的结构，使从LED光源射出的光线可以先经由所述透明介质130进行第一次折射，再透过所述第一入光面170的弧状突起120做第二次折射。因为所述导光板主体110的折射率大于等于所述透明介质130，且所述透明介质130的折射率大于空气，可以使光线更加集中避免光型的发散。
所述导光板本体110进一步具有数个网点150，所述网点150设置于所述导光板主体110的所述下表面176且平行于所述第一LED灯条140，用以破坏光线的反射条件以避免光型的发散。
图8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具有网点150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。本实施例中的网点150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9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150的长度、宽度以及深度的配置，可以使光线160在所述网点150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，与习知技术相比，本实施例之导光板藉由两段式的光线折射来集中光线，降低光型的发散、串扰。
图10为本发明的第二实施例的结构俯视图。根据本实施例，背光模块结构200与第一实施例的差异在于增加一第二LED灯条242，同时在一第二入光面272设置弧状突起220与相对应的所述透明介质230。此双侧入光模式背光模块与本发明的第一实施例相比，由于在双侧都有设置LED灯条，所述第一LED灯条240的光线在远程(靠近所述第二入光面272)产生的串扰，可以因为设置所述第二LED灯条242而较低串扰的影响；相对地，所述第二LED灯条242的光线在远程(靠近所述第一入光面270)产生的串扰也可相对地降低，进而达到更好的显示效果。
图11为本发明的第三实施例的结构俯视图。根据本实施例，背光模块结构300与第二实施例的差异在于于出光面374设置垂直于所述第一LED光条的长条型微结构的多个网点350。此入光模式背光模块与本发明的第二实施例相比，经过实验发现因为于出光面374设置与所所述第一LED光条垂直的所述网点350，进一步的使每个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
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Claims (19)

  1. 一种背光模块结构，包括：
    一导光板主体，所述导光板主体具有一出光面、相对于所述出光面的一下表面、与所述出光面和所述下表面邻接的第一入光面，所述第一入光面具有数个弧状突起；
    数个透明介质，设置于所述弧状突起之上；以及
    一第一LED灯条，设置于所述导光板主体的所述第一入光面，所述LED灯条包括数个LED光源分别对应所述弧状突起，所述弧状突起的中心与所述LED光源的中心对齐，所述弧状突起的厚度由中心往两旁递减。
  2. 根据权利要求1所述之背光模块结构，其中所述透明介质的厚度从相对应的所述弧状突起的中心往两旁递减。
  3. 根据权利要求1所述之背光模块结构，其中所述导光板主体的折射率大于等于所述透明介质，且所述透明介质的折射率大于空气。
  4. 根据权利要求1所述之背光模块结构，其中所述导光板本体进一步具有数个网点，所述网点设置于所述导光板主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所述之背光模块结构，其中所述网点为长条形微结构，所述微结构在所述导光板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所述之背光模块结构，其中所述长条形微结构的高度为20-200 μm, 宽度为30-300 μm以及长度为200-1200 μm。
  7. 根据权利要求6所述之背光模块结构，其中所述网点的长方向平行于所述第一LED灯条的方向。
  8. 根据权利要求6所述之背光模块结构，其中所述网点的长方向垂直于所述第一LED灯条的方向。
  9. 根据权利要求1所述之背光模块结构，其中
    所述导光板进一步具有与所述出光面和所述下表面邻接且与所述第一入光面相对的一第二入光面，所述第二入光面具有所述弧状突起，并具有透明介质，设置于所述弧状突起之上，且所述背光模块进一步具有第二LED灯条，设置于所述导光板主体的所述第二入光面，所述LED灯条包括数个LED光源分别对应所述弧状突起。
  10. 一种背光模块结构，包括：
    一导光板主体，所述导光板主体具有一出光面、相对于所述出光面的一下表面、与所述出光面和所述下表面邻接的第一入光面，所述第一入光面具有数个弧状突起；
    数个透明介质，设置于所述弧状突起之上；以及
    一第一LED灯条，设置于所述导光板主体的所述第一入光面，所述LED灯条包括数个LED光源分别对应所述弧状突起。
  11. 根据权利要求10所述之背光模块结构，其中所述弧状突起的中心与所述LED光源的中心对齐，所述弧状突起的厚度由中心往两旁递减。
  12. 根据权利要求10所述之背光模块结构，其中所述透明介质的厚度从相对应的所述弧状突起的中心往两旁递减。
  13. 根据权利要求10所述之背光模块结构，其中所述导光板主体的折射率大于等于所述透明介质，且所述透明介质的折射率大于空气。
  14. 根据权利要求10所述之背光模块结构，其中所述导光板本体进一步具有数个网点，所述网点设置于所述导光板主体的所述出光面与所述下表面至少其中一者。
  15. 根据权利要求14所述之背光模块结构，其中所述网点为长条形微结构，所述微结构在所述导光板的所述出光面与所述下表面至少其中一者内凹。
  16. 根据权利要求15所述之背光模块结构，其中所述长条形微结构的高度为20-200 μm, 宽度为30-300 μm以及长度为200-1200 μm。
  17. 根据权利要求15所述之背光模块结构，其中所述网点的长方向平行于所述第一LED灯条的方向。
  18. 根据权利要求15所述之背光模块结构，其中所述网点的长方向垂直于所述第一LED灯条的方向。
  19. 根据权利要求10所述之背光模块结构，其中
    所述导光板进一步具有与所述出光面和所述下表面邻接且与所述第一入光面相对的一第二入光面，所述第二入光面具有所述弧状突起，并具有透明介质，设置于所述弧状突起之上，且所述背光模块进一步具有第二LED灯条，设置于所述导光板主体的所述第二入光面，所述LED灯条包括数个LED光源分别对应所述弧状突起。
PCT/CN2013/087309 2013-11-13 2013-11-18 一种背光模块 Ceased WO2015070452A1 (zh)

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