CN111061111A - 导光板、前光照明装置及电子纸显示屏 - Google Patents

导光板、前光照明装置及电子纸显示屏 Download PDF

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CN111061111A
CN111061111A CN201911330123.0A CN201911330123A CN111061111A CN 111061111 A CN111061111 A CN 111061111A CN 201911330123 A CN201911330123 A CN 201911330123A CN 111061111 A CN111061111 A CN 111061111A
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guide plate
light guide
led lamp
light
circuit board
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林永强
孙景泉
林仙榕
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Guangzhou OED Technologies Co Ltd
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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
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    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09FDISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
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    • 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
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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
    • G02B6/0081Mechanical 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
    • G02B6/0083Details of electrical connections of light sources to drivers, circuit boards, or the like
    • 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
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    • 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
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    • G02B6/00Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
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    • 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 
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Abstract

本发明提供了一种导光板、前光照明装置及电子纸显示屏。其中所述导光板用于贴附于电泳显示模组显示面的上方,该导光板包括导光板主体,该导光板主体伸入LED灯区域,该导光板主体上设置有用于容置LED灯的凹槽。本发明通过在导光板上开设凹槽,并将导光板伸入LED灯区域,这样一方面使LED灯被包容于所述凹槽中,从而避免LED灯等受到挤压、磕碰而发生位置偏移,影响前光照明装置照明的稳定性及效果;另一方面可以使所述驱动电路板能够通过导光板进行支撑,避免因驱动电路板翘起等原因导致LED灯的位置发生偏移;再者,导光板伸入了LED灯区域,有效降低LED灯漏光的现象。因此本发明具有照明效果好、稳定性高的有益效果。

Description

导光板、前光照明装置及电子纸显示屏
本案申请是以下申请的分案申请,申请日为2014年01月10日,申请号为201410013489.6,发明名称为导光板、前光照明装置及电子纸显示屏。
技术领域
本发明涉及一种电子纸显示屏的照明技术,尤其是一种导光板、前光照明装置及电子纸显示屏。
背景技术
背光光源一般设有支撑框架,基本不会出现LED灯位置偏离的问题。但由于电子纸显示屏属于反射型显示屏,需要将光源设置于显示屏的前方,即为前光光源。在电子纸显示屏的前光应用中,为了减少厚度和重量,一般不方便采用支撑框架,且前光光源一般设置成柔软的灯条。
参考图1至图4,图1为现有技术中具有前光照明装置的电子纸显示屏的结构示意图;图2为图1中所示灯条的结构示意图;图3为图1中所示LED灯与导光板的结构关系示意图。所述电子纸显示屏包括电子纸显示模组10”、设置于该电子纸显示模组10”显示面上的导光板30”、设置于该电子纸显示模组10”与导光板30”之间的粘黏剂层20”、通过粘黏剂40”粘附于所述导光板30”上的灯条。所述灯条包括柔性电路板FPC50”和设置于柔性电路板FPC50”上的侧出光LED灯60”。所述柔性电路板FPC50”一端通过粘黏剂40”粘附于所述导光板30”上,另一端用于安装侧出光LED灯60”。所述LED灯60”焊接在柔性电路板FPC50”上,其出光对准导光板30”的入光侧面。由于没有使用支撑物来支撑柔性电路板FPC50”和LED灯60”。LED灯60”就靠柔性电路板FPC50”的一边搭在导光板30”上,这样LED灯60”悬空在导光板30”的边缘。
由于柔性电路板FPC50”是柔性的,支撑力度不足,加之LED灯60”与导光板30”具有相对较大的活动范围,导致LED灯60”等难以安装到位。即使安装到位,也很容易因碰压改变LED灯60”的位置,使LED灯60”歪斜、翘起,如图4所示。所述LED灯60”的歪斜、翘起会导致LED灯60”出光没有对准导光板30”的入光侧面,LED灯60”的部分光线没有进入导光板,这样造成光能损失,光强减弱,前光亮度减少。如果灯条是多个LED灯组成,其中某个LED灯出现这样的问题,该部位导光板还会出现暗斑或色斑,整个前光亮度或色度不均匀,影响阅读效果。
发明内容
针对现有技术的不足,本发明的目的之一是提供一种导光板,其导光效果更好,且能够使电子纸显示屏的前光照明效果更好、更稳定。
本发明的目的之二是提供一种前光照明装置,其照明效果更好,更稳定。
本发明的目的之三是提供一种电子纸显示屏,其前光照明效果更好,更加稳定。
为达到上述目的之一,本发明提供一种导光板,其用于贴附于电泳显示模组显示面的上方,其包括导光板主体,该导光板主体伸入LED灯区域,该导光板主体上设置有用于容置LED灯的凹槽;该LED灯包括与驱动电路板连接的灯芯,包裹于该灯芯上的灯壳,所述灯壳靠近所述导光板入光面一侧开孔。
所述电泳显示模组其包括微胶囊电泳显示模组或微杯电泳显示模组。
作为本发明一种导光板在一方面的改进,所述凹槽贯穿所述导光板的上下面。
作为本发明一种导光板在一方面的改进,所述凹槽的形状、大小与LED灯的形状、大小相适配。
为达到上述目的之二,本发明还提供一种前光照明装置,其包括导光板、设于该导光板上的驱动电路板、与该驱动电路板相连的LED灯,所述导光板为上述任意一项所述的导光板,所述LED灯容置于该导光板的凹槽中。
上述所述驱动电路板设于该导光板上是指所述驱动电路板可位于导光板的上下任意一面。
作为本发明一种前光照明装置在一方面的改进,所述LED灯呈长条形状。
作为本发明一种前光照明装置在一方面的改进,所述LED灯灯头顶部与所述凹槽的槽口相平齐。
作为本发明一种前光照明装置在一方面的改进,所述导光板与驱动电路板之间设置有胶黏剂层。
作为本发明一种前光照明装置在一方面的改进,所述导光板与电泳显示模组之间设置有光学胶层。
为达到上述目的之三,本发明还提供一种电子纸显示屏,其包括电泳显示模组、设置于该电泳显示模组上的前光照明装置,所述前光照明装置为上述任意一项所述的前光照明装置。
作为本发明一种电子纸显示屏在一方面的改进,所述电泳显示模组依次包括基板层、微胶囊电泳显示层以及透明保护膜层。
作为本发明一种电子纸显示屏在一方面的改进,所述导光板的上方或下方还设置有触摸屏模组。
与现有技术相比较,本发明导光板、前光照明装置及电子纸显示屏,通过在导光板上开设凹槽,并将导光板伸入LED灯区域,使LED灯被包容于所述凹槽中,从而避免LED灯等受到挤压、磕碰而发生位置偏移,影响前光照明装置照明的稳定性及效果;另外由于导光板伸入了LED灯区域,所述驱动电路板能够通过导光板进行支撑,避免因驱动电路板翘起等原因导致LED灯的位置发生偏移;再者,导光板伸入了LED灯区域,有效降低LED灯漏光的现象。因此本发明具有照明效果好、稳定性高的有益效果。
附图说明
图1为现有技术中具有前光照明装置的电子纸显示屏的结构示意图。
图2为图1中所示灯条的结构示意图。
图3为图1中所示LED灯与导光板的结构关系示意图。
图4为图1中所述LED灯位置偏移的结构示意图。
图5为本发明具有前光照明装置的电子纸显示屏在一个优选实施例中的结构示意图。
图6为图5中A-A向截面示意图。
图7为图5中所示灯条与导光板的位置关系示意图。
图8为图5中所示LED灯与导光板的位置关系示意图。
图9为图5中所示灯条的结构示意图。
图10为图9中所示LED灯的结构示意图。
图11为图5中所示电泳显示模组在一个优选实施例中的结构示意图。
图12为本发明具有前光照明装置的电子纸显示屏在另一个优选实施了中的结构示意图。
图13为本发明具有前光照明装置的电子纸显示屏在又一个优选实施了中的结构示意图。
10:电泳显示模组; 11:基板层
12:微胶囊电泳显示层 13:透明保护膜层
20:光学胶层; 30:导光板;
31:凹槽; 32:凹槽槽边;
40:胶黏剂层; 50:驱动电路板;
60:LED灯; 61:灯壳;
62:灯芯; 70:触摸屏模组;
100:LED灯区域。
本发明目的的实现、功能特点及优异效果,将在下面结合具体实施例以及附图做进一步的说明。
具体实施方式
下面结合附图和具体实施例对本发明所述技术方案作进一步的详细描述,以使本领域的技术人员可以更好的理解本发明并能予以实施,但所举实施例不作为对本发明的限定。
提供一种导光板,其用于贴附于电泳显示模组的显示面上方,其包括导光板主体,该导光板主体伸入LED灯区域,该导光板主体上设置有用于容置LED灯的凹槽。
作为一种导光板在上述实施例的改进,所述凹槽贯穿所述导光板的上下面。
作为一种导光板在上述任意一实施例上的改进,所述凹槽的形状、大小与LED灯的形状、大小相适配。
提供一种前光照明装置,其包括导光板、用于贴附于该导光板上的驱动电路板、与该驱动电路板相连的LED灯,所述导光板为上述任意一项所述的导光板,所述LED灯容置于该导光板的凹槽中。
作为一种前光照明装置在上述任意一实施例上的改进,所述LED灯呈长条形状。
作为一种前光照明装置在上述任意一实施例上的改进,所述导光板与驱动电路板之间设置有胶黏剂层。
作为一种前光照明装置在上述任意一实施例上的改进,所述导光板与电泳显示模组之间设置有光学胶层。
提供一种电子纸显示屏,其包括电泳显示模组、设置于该电泳显示模组上的前光照明装置,所述前光照明装置为上述任意一项所述的前光照明装置。
作为一种电子纸显示屏在上述实施例中的改进,所述电泳显示模组依次包括基板层、微胶囊电泳显示层以及透明保护膜层。
作为一种电子纸显示屏在上述任意一实施例上的改进,所述导光板的上方或下方还设置有触摸屏模组。
提供一种电子纸显示屏,参见图5-10,图5为本发明具有前光照明装置的电子纸显示屏在一个优选实施了中的结构示意图;图6为图5中所示A-A向截面示意图;图7为图5中所示灯条与导光板的位置关系示意图;图8为图5中所示LED灯与导光板的位置关系示意图。所述电子纸显示屏包括电泳显示模组10、设置于该电泳显示模组10上的前光照明装置。所述前光照明装置包括用于设置在电泳显示模组10显示面上方的导光板30,用于贴附于该导光板30上的灯条。所述灯条包括驱动电路板50,与该驱动电路板50相连的LED灯60。所述导光板30与驱动电路板50之间设置有胶黏剂层40。所述导光板30与电泳显示模组10显示面之间设置有光学胶层20。
所述电泳显示模组10可以是微胶囊式电泳显示模组、微杯式电泳显示模组等反射型显示模组。以微胶囊电泳显示模组为例,如图11,该微胶囊电泳显示模组依次包括基板层11、微胶囊电泳显示层12、透明保护膜层13。所述微胶囊电泳显示层为固态电泳显示层。所述基板层可以为TFT玻璃基板层。所述微胶囊电泳显示层12中包裹有电泳液、带正电荷或负电荷的颜料粒子以及中性颜料粒子。在驱动电压的驱动下,带电的颜料粒子在微胶囊中移动进行显示。当然在其他实施例中,所述微胶囊电泳显示层12中包裹有电泳液、带正电荷的颜料粒子和带负电荷的颜料粒子,在驱动电压的驱动下,带电的颜料粒子在微胶囊中移动进行显示。
所述光学胶层20用于胶结导光板30与电泳显示模组10。该光学胶层20所采用的光学胶要求具有无色透明、光透过率在90%以上、胶结强度良好,可在室温或中温下固化,且有固化收缩小等特点。有机硅橡胶、丙烯酸型树脂及不饱和聚酯、聚氨酯、环氧树脂等胶粘剂都可胶结光学元件。在配制时通常要加入一些处理剂,以改进其光学性能或降低固化收缩率。
所述导光板30是光学级的亚克力PMMA/PC板材。可以用高折射率的材料,在光学级的亚克力PMMA/PC板材的表面用UV网版印刷技术印上导光点。也可以通过注塑机一次射出成型,制造出带有凹或凸导光点的导光板30。从灯发出来的光进入导光板30内部,在导光板两面之间全反射传递到远端,当光线射到各个导光点时,会破坏全反射条件由导光板表面射出。通过各种疏密、大小不一的导光点设计,可使导光板均匀发光。
所述胶黏剂层40用于粘接所述导光板30与驱动电路板50。
所述驱动电路板50为柔性印刷电路板,用于驱动LED灯。该驱动电路板50通过胶黏剂层40粘附于所述导光板30上,其上焊接有多个LED灯60。多个LED灯60成线型规则排列于所述驱动电路板50上。
参考图7-8,所述导光板30用于贴附于电泳显示模组10显示面的上方,其包括导光板主体,该导光板主体通过加长延伸伸入LED灯区域100,所述LED灯区域100是指LED灯所处位置及其相邻的一个区域,例如图8中所示虚线区域,在具有两个或两个以上的LED灯时,该LED灯区域100还应当包括LED灯之间的区域。所述导光板主体上设置有用于容置LED灯60的凹槽31,所述LED灯容置于该导光板30的凹槽31中,这样导光板主体通过这种形式伸入LED灯区域100中。所述LED灯被包容于所述凹槽31中,这样可以避免LED灯60受到挤压、磕碰,从而定位LED灯60的位置避免发生位置偏移的现象;另外由于导光板30伸入了LED灯区域100,所述驱动电路板50能够通过导光板30的凹槽槽边32进行支撑,避免因驱动电路板50翘起等原因导致LED灯的位置发生偏移;再者,导光板30伸入了LED灯区域100,有效降低LED灯60漏光的现象。因此本发明具有照明效果好、稳定性高的有益效果。
所述凹槽31贯穿导光板主体的上下面,这样便于凹槽31的加工,也便于将LED灯容置于凹槽31中。所述LED灯60呈长条形状,这样便于拓宽LED灯的发光面,即能够给导光板提供更宽范围的光照。所述凹槽31的形状、大小与LED灯60的形状、大小相适配,即该凹槽31也可以做成长条形凹槽,其深度与条状LED灯的宽度相适配,这样所述LED灯60灯头顶部与所述凹槽31的槽口相平齐。
参考图9-10,所述LED灯60为侧出光的LED灯,该LED灯包括与驱动电路板50连接的灯芯62,包裹于该灯芯62上的灯壳61。所述灯壳61靠近导光板30入光面一侧开孔,灯芯62通电后发光,光线通过灯壳61侧面的开孔射入导光板30的入光面。
参考图12,图13为本发明具有前光照明装置的电子纸显示屏在另一个优选实施了中的结构示意图;本实施例在上述实施例的基础上,在导光板30的下方加设有触摸屏模组70,即在导光板30与电泳显示模组10之间加设触摸屏模组70。所述触摸屏模组70能够使电子纸显示屏具有触控输入功能。
图13为本发明具有前光照明装置的电子纸显示屏在又一个优选实施了中的结构示意图。本实施例在在导光板30的上方加设有触摸屏模组70,这样能够使触摸屏模组70的操作更加灵敏。
以上所述仅为本发明的优选实施例,并非因此限制本发明的专利范围,凡是利用本发明说明书及附图内容所作的等效结构或等效流程变换,或直接或间接运用在其他相关的技术领域,均同理包括在本发明的专利保护范围内。

Claims (8)

1.一种电子纸显示屏,其包括电泳显示模组、设置于该电泳显示模组上的前光照明装置,其特征在于,所述前光照明装置包括导光板、设于该导光板上的驱动电路板、与该驱动电路板相连的LED灯,所述驱动电路板设于所述导光板对应LED灯区域的上表面,所述导光板用于贴附于电泳显示模组显示面的上方,其包括导光板主体,该导光板主体伸入LED灯区域,该导光板主体上设置有用于容置LED灯的凹槽,所述LED灯容置于该导光板的凹槽中;该LED灯包括与驱动电路板连接的灯芯和包裹于该灯芯上的灯壳,所述灯壳靠近所述导光板入光面一侧开孔。
2.如权利要求1所述的一种前光照明装置,其特征在于所述凹槽贯穿所述导光板的上下面。
3.如权利要求1所述的一种前光照明装置,其特征在于所述凹槽的形状、大小与LED灯的形状、大小相适配。
4.如权利要求1所述的一种前光照明装置,其特征在于所述LED灯呈长条形状。
5.如权利要求1-4中任意一项所述的一种前光照明装置,其特征在于所述导光板与驱动电路板之间设置有胶黏剂层。
6.如权利要求1-5中任意一项所述的一种前光照明装置,其特征在于所述导光板与电泳显示模组之间设置有光学胶层。
7.如权利要求1所述的一种电子纸显示屏,其特征在于所述电泳显示模组依次包括基板层、微胶囊电泳显示层以及透明保护膜层。
8.如权利要求1所述的一种电子纸显示屏,其特征在于所述导光板的上方或下方还设置有触摸屏模组。
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