CN106772760A - 一种导光板及液晶模组 - Google Patents

一种导光板及液晶模组 Download PDF

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CN106772760A
CN106772760A CN201611214463.3A CN201611214463A CN106772760A CN 106772760 A CN106772760 A CN 106772760A CN 201611214463 A CN201611214463 A CN 201611214463A CN 106772760 A CN106772760 A CN 106772760A
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light
guide plate
light guide
liquid crystal
face
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CN106772760B (zh
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徐鹏博
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Wuhan China Star Optoelectronics Technology Co Ltd
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Wuhan China Star Optoelectronics Technology Co Ltd
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Priority to US15/327,216 priority patent/US20190235149A1/en
Priority to PCT/CN2016/112424 priority patent/WO2018113001A1/zh
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    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011Light 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
    • G02B6/0013Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0015Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/002Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it by shaping at least a portion of the light guide, e.g. with collimating, focussing or diverging surfaces
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011Light 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
    • G02B6/0013Means for improving the coupling-in of light from the light source into the light guide
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011Light 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
    • G02B6/0013Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0015Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/0018Redirecting means on the surface of the light guide
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011Light 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
    • G02B6/0013Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0023Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
    • G02B6/0028Light guide, e.g. taper
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011Light 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
    • G02B6/0033Means for improving the coupling-out of light from the light guide
    • G02B6/0035Means 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
    • G02B6/0038Linear indentations or grooves, e.g. arc-shaped grooves or meandering grooves, extending over the full length or width of the light guide
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011Light 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
    • G02B6/0033Means for improving the coupling-out of light from the light guide
    • G02B6/0035Means 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
    • G02B6/0045Means 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 by shaping at least a portion of the light guide
    • G02B6/0046Tapered light guide, e.g. wedge-shaped light guide
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011Light 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
    • G02B6/0033Means for improving the coupling-out of light from the light guide
    • G02B6/0035Means 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
    • G02B6/0045Means 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 by shaping at least a portion of the light guide
    • G02B6/0046Tapered light guide, e.g. wedge-shaped light guide
    • G02B6/0048Tapered light guide, e.g. wedge-shaped light guide with stepwise taper
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011Light 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
    • G02B6/0081Mechanical 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
    • G02B6/0086Positioning aspects
    • G02B6/009Positioning aspects of the light source in the package
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/10Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type
    • G02B6/12Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind
    • G02B6/122Basic optical elements, e.g. light-guiding paths
    • G02B6/1228Tapered waveguides, e.g. integrated spot-size transformers
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24Coupling light guides
    • G02B6/26Optical coupling means
    • G02B6/28Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
    • G02B6/2804Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals forming multipart couplers without wavelength selective elements, e.g. "T" couplers, star couplers
    • G02B6/2852Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals forming multipart couplers without wavelength selective elements, e.g. "T" couplers, star couplers using tapping light guides arranged sidewardly, e.g. in a non-parallel relationship with respect to the bus light guides (light extraction or launching through cladding, with or without surface discontinuities, bent structures)
    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL 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
    • G02F1/00Devices 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
    • G02F1/01Devices 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 
    • G02F1/13Devices 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
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333Constructional arrangements; Manufacturing methods
    • G02F1/1335Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336Illuminating devices
    • G02F1/133602Direct backlight
    • G02F1/133606Direct backlight including a specially adapted diffusing, scattering or light controlling members
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/10Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type
    • G02B6/12Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind
    • G02B2006/12083Constructional arrangements
    • G02B2006/12092Stepped
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/10Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type
    • G02B6/12Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind
    • G02B2006/12166Manufacturing methods
    • G02B2006/12195Tapering
    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL 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
    • G02F1/00Devices 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
    • G02F1/01Devices 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 
    • G02F1/13Devices 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
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333Constructional arrangements; Manufacturing methods
    • G02F1/1335Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336Illuminating devices
    • G02F1/133602Direct backlight
    • G02F1/133606Direct backlight including a specially adapted diffusing, scattering or light controlling members
    • G02F1/133607Direct backlight including a specially adapted diffusing, scattering or light controlling members the light controlling member including light directing or refracting elements, e.g. prisms or lenses

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Planar Illumination Modules (AREA)

Abstract

本发明涉及液晶显示面板技术领域,尤其涉及一种导光板及液晶模组,本发明提出的导光板,包括出光面、底面、入光端面,该入光端面与所述出光面平行设置,还包括第一导引斜面,所述第一导引斜面的一端与所述底面相交,另一端与所述入光端面相交,所述第一导引斜面与所述底面构成第一角度,第一角度大于90度,尤其是当第一角度等于135度时,第一导引斜面处构成全反射棱镜,使得垂直于入光端面进入导光板的光线在经过第一导引斜面时发生全反射进入导光板内传播,本发明同时提出了包含该导光板的液晶模组,使得液晶模组变得更薄,实现了轻薄化设计。

Description

一种导光板及液晶模组
技术领域
本发明涉及液晶显示面板技术领域,尤其涉及一种导光板及液晶模组,本发明的液晶模组由于包含有本发明的导光板,使得液晶模组的厚度更薄。
背景技术
液晶显示器不同于自发光型的CRT、PDP等,由于液晶本身并不发光,为进行显示,外部光源不可或缺。位于显示屏背面的光源称为背光源,按光源(荧光灯、LED、EL等)与导光板间的位置关系,背光源有下置式和侧置式之分。下置式背光源的优点是,光利用率高,容易实现大面积,缺点是亮度不均匀,而且厚度尺寸大,随着人们对笔记本电脑等便携设备的需求不断增大,迫切需要更薄型化、轻量化的液晶模组,所以侧置式背光源的应用越来越多。
侧置式背光源的应用一定程度上降低了液晶模组的厚度,但模组的整体厚度是由最后的材料堆叠决定的,图1为现有技术中超薄模组10的结构示意图,其中采用的背光源为侧置式背光源,背光源13包括LED灯131和固定架132,其设置在导光板12的左侧,导光板12的下面设置有反光片11,导光板12的上部设置有中间层14,中间层14的上部依次设置有结合胶层141和液晶面板15,为了预防振动时背光源对液晶面板的影响,液晶面板15与结合胶层141之间会预留一个微小的第一间隙16。为了适应侧置式光源,导光板12存在第一斜面121,从而导致当液晶面板15设置在中间层14上方时,在导光板出光侧122的正上方,液晶面板15与结合胶层141之间存在无法补偿的第二间隙17,所以模组10的厚度主要由反光片11、导光板12、中间层14、第二间隙17和液晶面板15决定,在图1中,液晶模组主要有导光板出光侧第一厚度T1、导光板入光侧第二厚度T2、液晶模组整体厚度T3,而当导光板出光侧122的厚度、反光片11等材料薄化到一定程度后,受LED、挠性印制电路板等材料薄化难度较大的限制,很难进一步减小液晶模组的厚度,例如现有技术中5.2”超薄液晶模组为例,该液晶模组的第一厚度T1为0.52mm,第二厚度T2为0.63mm,液晶模组整体厚度T3为0.97mm,第二间隙为0.06mm,由于现有材料的限制,第二间隙无法消除,因此为了进一步减小液晶模组的厚度亦即消除第二间隙,就需要一种更新的技术。
发明内容
为了进一步减小液晶模组的厚度,本发明提出了一种导光板,同时提出了一种包含该导光板的背光模组,该背光模组由于使用该导光板后,消除了现有技术中的第二间隙,使得背光模组厚度更小。
本发明提出的导光板,包括出光面;底面,该地面与所述出光面相对设置;入光端面,该入光端面与所述出光面平行设置,所述入光端面包括第一边缘和第二边缘,所述第一边缘靠近所述出光面,所述第二边缘远离所述出光面;第一导引斜面,所述第一导引斜面的一端与所述底面相交于第一边界,另一端与所述入光端面的第二边缘相连,所述第一导引斜面与所述底面构成第一角度,第一角度大于90度。
这种设置的导光板,当光源从入光端面进入导光板后,直射到第一导引斜面上,在第一导引斜面上发生反射,进而在导光板内传播。
作为对本发明的进一步改进,所述导光板进一步包括第二导引斜面,所述第二导引斜面的一端与所述出光面相交于第二边界,另一端与所述入光端面的第一边缘相连,所述第二导引斜面与所述出光面构成第二角度,第二角度大于90度。
这样设置后,就可以使得导光板各处的厚度基本一致,更加节省材料,有利于一体成型,方便导光板的制作。
作为对带有第一导引斜面和第二导引斜面的导光板的改进,该导光板还包括第一侧面,所述第一侧面与所述入光端面垂直,所述第一导引斜面通过所述第一侧面与所述入光端面的第二边缘相连;进一步包括第二侧面,所述第二侧面与所述第一侧面平行,所述第二导引斜面通过所述第二侧面与所述入光端面的第一边缘相连。
当设置了第一侧面和第二侧面后,使得导光板的厚度增大,以便入光端面与液晶面板处于基本水平位置,缩短了挠性印制线路板上的光源与入光端面之间的距离,减少了光线的外泄,更充分的利用现有光源。
在一个优选的实施例中,所述第一角度不小于所述第二角度,尤其当第一角度等于第二角度且为135度时,所述第一导引斜面处构成直角棱镜,根据直角棱镜原理可知,从入光端面射入的光线与第一导引斜面呈45度角射入,此时从入光端面射入的光线在遇到第一导引斜面后全部被第一导引斜面反射进入导光板内,进一步避免了光源的外泄,提高了光源的利用率。
在本发明的一个实施例中,所述入光端面与所述出光面重合,所述第一角度等于135度。
这种导光板,取出光面上的端部的一部分作为入光端面,在入光端面对应的底面处加工一个45度倒角构成,因此,此种导光板更加容易制作加工,且当第一角度等于135度时,所述第一导引斜面处同样构成直角棱镜,根据直角棱镜原理可知,从入光端面射入的光线与第一导引斜面呈45度角射入,此时从入光端面射入的光线在遇到第一导引斜面后全部被第一导引斜面反射进入导光板内,进一步避免了光源的外泄,提高了光源的利用率。同时,这种导光板由于不再具有第一侧面和第二侧面,可直接由平板制成,其结构更坚固,成本更低。
本发明同时提出了一种液晶模组,该液晶模组包括本发明提出的导光板,该液晶模组依次设置有反射片、导光板、中间层、液晶面板,其中,所述导光板的入光端面上设置有光源,所述光源设置在所述液晶面板的挠性印制线路板上。
这种液晶模组,使用了本发明提出的导光板,同时将LED光源设置在液晶面板的挠性印制电路板上,同时挠性印制电路板与液晶面板设置在同一高度上,不再像现有技术中那样使用设置在液晶面板下方的带有固定架的侧置式光源,从而进一步减小了液晶模组的厚度,有利于液晶模组的轻薄化设计。
附图说明
在下文中将基于实施例并参考附图来对本发明进行更详细的描述。其中:
图1为现有技术中5.2”超薄液晶模组10的结构示意图;
图2为本发明第一个实施例的导光板结构示意图;
图3为本发明第二个实施例的导光板结构示意图;
图4为本发明第三个实施例的导光板结构示意图;
图5为本发明第四个实施例的导光板结构示意图;
图6为本发明提出的液晶模组20的结构示意图;
图7为本发明提出的液晶模组30的结构示意图。
在附图中,相同的部件使用相同的附图标记。附图并未按照实际的比例。
具体实施方式
下面将结合附图对本发明作出进一步的说明。
实施例一:
图2为本发明第一个实施例的导光板100,导光板100的截面如图2所示,从图2中可以看出,导光板100包括出光面101,底面102,底面102与出光面101相对设置,在本实施例中,在底面102的左端有一斜面,该斜面构成第一导引斜面104,第一导引斜面104的一端与底面102相交于第一边界111,在第一边界111处,第一导引斜面104与底面102形成第一角度θ1,优选地,第一角度θ1大于90度。
从第一边界111开始且与底面垂直向上构成第一辅助112’,第一辅助112’与出光面101相交于第一边缘112,在出光面101上,自第一边缘112向左至出光面101的左边缘区域构成入光端面103,这里将入光端面103的左边缘称作第二边缘113,即第一边缘112与第二边缘113之间的区域为入光端面103,此时,第一导引斜面104与入光端面103相交于第二边缘113。导光板100的实体为如图2截面在其垂直方向延伸得到。
当入射光线20垂直于入光端面103进入导光板100时,入射光线20直接射入到第一导引斜面104上,经过第一导引斜面104反射后进入导光板,在具体实施中,在第一导引斜面104上设置有凸点,以便射入到第一导引斜面104上的光线更多地反射进入导光板,减少光线折射外泄,尤其当第一角度θ1为135度时,第一导引斜面104处构成全反射棱镜,使得射到第一导引斜面104上的光线全部被反射进入导光板中,不再产生折射,更充分地利用了现有光源,提高了液晶面板的显示亮度。
实施例二:
图3为本发明第二个实施例的导光板200,导光板200的截面如图3所示,从图3中可以看出,导光板200包括出光面201,底面202,底面202与出光面201相对设置,入射端面203与出光面201平行,在本实施例中,第一导引斜面204的一端与底面202相交于第一边界211,第一导引斜面204的另一端与入光端面203相交于第二边缘213,在第一边界211处,第一导引斜面204与底面202形成第一角度θ2,优选地,第一角度θ2大于90度。
与实施例一不同的是,导光板200还包括第二导引斜面205,第二导引斜面205的一端与出光面201相交于第二边界214,另一端与入光端面203相交于第一边缘212,在第二边界214处,第二导引斜面205与出光面201构成第二角度β2,优选地,β2大于90度,且第一角度θ2不小于第二角度β2,这样设置,可以保证入光端面203的宽度,且便于导光板200的制作生产。导光板200的实体为如图3截面在其垂直方向延伸得到。
当入射光线20垂直于入光端面203进入导光板200时,入射光线20直接射入到第一导引斜面204上,经过第一导引斜面204反射后进入导光板,在具体实施中,经第一导引斜面204反射的光线一部分会射入到第二导引斜面205上,再经第二导引斜面205反射,为了防止第一导引斜面204和第二导引斜面205处的光线折射外泄,在第一导引斜面204和第二导引斜面205上设置有凸点,以便射入到第一导引斜面204和第二导引斜面205上的光线更多地反射进入导光板,减少光线折射外泄,尤其当第一角度θ2和第二角度β2同时为135度时,第一导引斜面204和第二导引斜面205处均构成全反射棱镜,使得射到第一导引斜面204上的光线全部被反射进入导光板中,不再产生折射,有一部分光线会经过第一导引斜面204和第二导引斜面205反复反射,最终在导光板中传播,减少了光线的泄露,更充分地利用了现有光源,提高了液晶面板的显示亮度。
实施例三:
图4为本发明第三个实施例的导光板300,导光板300的截面如图4所示,从图4中可以看出,导光板300包括出光面301,底面302,第一导引斜面304、第二导引斜面305、入射端面303,导光板300与实施例二中的导光板200不同的是,导光板300还包括第一侧面306,第一侧面306与入光端面303垂直相交于第二边缘313,第一侧面306的另一端与第一导引斜面304相交,亦即第一导引斜面304通过第一侧面306与入光端面303的第二边缘313相连。在本实施例中,第一角度θ3和第二角度β3均大于90度,且第一角度θ3不小于第二角度β3,第一侧面306的设置在一定程度上提高了入光端面303的高度,缩短了挠性印制线路班上的光源与入光端面的距离,更有效地利用光源。导光板300的实体为如图4截面在其垂直方向延伸得到。
本实施例的导光板300,当入射光线20垂直于入光端面303进入导光板300时,入射光线20直接射入到第一导引斜面304上,经过第一导引斜面304反射后进入导光板,在具体实施中,经第一导引斜面304反射的光线一部分会射入到第二导引斜面305上,再经第二导引斜面305反射,为了防止第一导引斜面304和第二导引斜面305处的光线折射外泄,在第一导引斜面304和第二导引斜面305上设置有凸点,以便射入到第一导引斜面304和第二导引斜面305上的光线更多地反射进入导光板,减少光线折射外泄,尤其当第一角度θ3和第二角度β3同时为135度时,第一导引斜面304和第二导引斜面305处均构成全反射棱镜,使得射到第一导引斜面304上的光线全部被反射进入导光板中,不再产生折射,有一部分光线会经过第一导引斜面304和第二导引斜面305反复反射,最终在导光板中传播,减少了光线的泄露,更充分地利用了现有光源,提高了液晶面板的显示亮度。
实施例四:
图5为本发明第四个实施例的导光板400,导光板400的截面如图5所示,从图5中可以看出,导光板400与导光板300所不同的是,导光板400还包括第二侧面407,第二侧面407与入光端面403垂直相交于第一边缘412,另一端与第二导引斜面405相交,亦即第二导引斜面405通过第二侧面407与入光端面403的第一边缘412相连。
导光板400相比于导光板300,进一步提高了入光端面403的高度,更进一步缩短了挠性印制线路板上的光源与入光端面的距离,更有效地利用了光源。导光板400的实体为如图5截面在其垂直方向延伸得到。
本实施例的导光板400,当入射光线20垂直于入光端面403进入导光板400时,入射光线20直接射入到第一导引斜面404上,经过第一导引斜面404反射后进入导光板,在具体实施中,经第一导引斜面404反射的光线一部分会射入到第二导引斜面405上,再经第二导引斜面405反射,为了防止第一导引斜面404和第二导引斜面405处的光线折射外泄,在第一导引斜面404和第二导引斜面405上设置有凸点,以便射入到第一导引斜面404和第二导引斜面405上的光线更多地反射进入导光板,减少光线折射外泄,尤其当第一角度θ4和第二角度β4同时为135度时,第一导引斜面404和第二导引斜面405处均构成全反射棱镜,使得射到第一导引斜面404上的光线全部被反射进入导光板中,不再产生折射,有一部分光线会经过第一导引斜面404和第二导引斜面405反复反射,最终在导光板中传播,减少了光线的泄露,更充分地利用了现有光源,提高了液晶面板的显示亮度。
本发明同时提出了一种液晶模组,如图6为该液晶模组20的结构示意图,该液晶模组20自下而上依次设置有反射片21、导光板400、中间层24、胶合层241、液晶面板25,在导光板400的入光端面上设置有LED光源232,此处的LED光源232通过固定架231设置在液晶面板25的挠性印制线路板29上,由于挠性印制线路板29与液晶面板25基本布置在同一水平面上,不再像现有技术图1中那样LED光源处于液晶面板的下方,这样就消除了现有技术中的第二间隙,仍旧以5.2”超薄液晶模组为例,当其他材质不变的情况下,由于使用了本发明的导光板400和设置在挠性印制线路板上的LED光源,从而消除了第二间隙,从而使得液晶模组20的整体厚度T3’减小为0.91mm,使液晶模组变得更薄,实现了液晶模组的轻薄化设计。
当液晶模组使用本发明其他实施例中的导光板时,可以在将LED光源制作在挠性印制线路板上时,通过增加LED光源固定架的厚度,使得LED相对于挠性印制线路板增高,以补充导光板入光端面与LED出光面的距离。如图7为使用本发明导光板100的液晶模组30的结构示意图,其中设置在挠性印制线路板上的LED光源332通过固定架331进行了增高,补偿了导光板100的入光端面与LED出光面之间的距离,充分利用了光源,使得液晶模组的厚度更薄,便于实现液晶模组的轻薄化设计。
最后说明的是,以上实施例仅用于说明本发明的技术方案而非限制,尽管参照较佳实施例对本发明进行了详细说明,本领域的普通技术人员应当理解,可以对本发明的技术方案进行修改或者等同替换,而不脱离本发明技术方案的宗旨和范围,其均应涵盖在本发明的权利要求范围当中。

Claims (10)

1.一种导光板,包括,
出光面;
底面,与所述出光面相对设置;
入光端面,与所述出光面平行设置,包括第一边缘和第二边缘,所述第一边缘靠近所述出光面,所述第二边缘远离所述出光面;
第一导引斜面,所述第一导引斜面的一端与所述底面相交于第一边界,另一端与所述入光端面的第二边缘相连,所述第一导引斜面与所述底面构成第一角度,第一角度大于90度。
2.根据权利要求1所述的导光板,其特征在于,进一步包括第二导引斜面,所述第二导引斜面的一端与所述出光面相交于第二边界,另一端与所述入光端面的第一边缘相连,所述第二导引斜面与所述出光面构成第二角度,第二角度大于90度。
3.根据权利要求2所述的导光板,其特征在于,还包括第一侧面,所述第一侧面与所述入光端面垂直,所述第一导引斜面通过所述第一侧面与所述入光端面的第二边缘相连。
4.根据权利要求3所述的导光板,其特征在于,进一步包括第二侧面,所述第二侧面与所述第一侧面平行,所述第二导引斜面通过所述第二侧面与所述入光端面的第一边缘相连。
5.根据权利要求2或3或4所述的导光板,其特征在于,所述第一角度不小于所述第二角度。
6.根据权利要求5所述的导光板,其特征在于,所述第一角度等于135度。
7.根据权利要求1所述的导光板,其特征在于,所述入光端面与所述出光面重合。
8.根据权利要求7所述的导光板,其特征在于,所述第一角度等于135度。
9.一种液晶模组,其特征在于,包括权利要求1至8任意一项所述的导光板,所述导光板依次设置有反射片、导光板、中间层、胶合层、液晶面板,其中,
所述导光板的入光端面上设置有光源。
10.根据权利要求9所述的液晶模组,其特征在于,所述光源设置在所述液晶面板的挠性印制线路板上。
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