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CN104730617B - 导光板、背光模组及显示装置 - Google Patents

导光板、背光模组及显示装置 Download PDF

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CN104730617B
CN104730617B CN201510094538.8A CN201510094538A CN104730617B CN 104730617 B CN104730617 B CN 104730617B CN 201510094538 A CN201510094538 A CN 201510094538A CN 104730617 B CN104730617 B CN 104730617B
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light guide
guide plate
mounting hole
circuit board
flexible circuit
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CN104730617A (zh
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郭伟
曾杰
刘中杰
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Wuhan China Star Optoelectronics Technology Co Ltd
TCL China Star Optoelectronics Technology Co Ltd
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Shenzhen China Star Optoelectronics Technology Co Ltd
Wuhan China Star Optoelectronics Technology Co Ltd
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Priority to CN201510094538.8A priority Critical patent/CN104730617B/zh
Priority to PCT/CN2015/074687 priority patent/WO2016138679A1/zh
Priority to US14/646,019 priority patent/US9857517B2/en
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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
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0015—Means 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
    • G02B6/002—Means 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
    • 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
    • G02B6/0081—Mechanical 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
    • G02B6/0086—Positioning aspects
    • G02B6/0088—Positioning aspects of the light guide or other optical sheets in the package
    • 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
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0015—Means 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
    • G02B6/002—Means 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
    • G02B6/0021—Means 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 for housing at least a part of the light source, e.g. by forming holes or recesses
    • 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
    • G02B6/0081—Mechanical 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
    • G02B6/0083—Details of electrical connections of light sources to drivers, circuit boards, or the like
    • 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
    • G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
    • 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
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0023—Means 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
    • G02B6/0028—Light guide, e.g. taper
    • 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
    • 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
    • G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
    • G02F1/133607—Direct 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)
  • Planar Illumination Modules (AREA)

Abstract

本发明提供了一种导光板、背光模组及显示装置。所述导光板的边缘处设有厚度均匀的、用于安装柔性线路板的平台部，所述平台部上设有用于安装LED的安装孔。所述背光模组包括LED、柔性线路板以及上述导光板，所述LED安装在所述安装孔内，所述柔性线路板安装在所述平台部上。所述显示装置包括显示面板和上述背光模组。本发明能够使柔性线路板和导光板之间的连接稳定性得以加强，从而降低发生耦合失效的几率。还能提高整体结构的稳定性，同时，降低了加工难度以及降低加工成本。

Description

导光板、背光模组及显示装置
技术领域
本发明涉及显示技术领域，特别是涉及一种导光板、背光模组及显示装置。
背景技术
显示装置中，背光模组用于供应充足的亮度与分布均匀的光源，使得显示装置能正常显示影像。导光板(LGP)是背光模组中的一个部件，导光板是利用光学级的亚克力/PC板材，通过网点印刷、注塑或者热压，在导光板上加工出出光点，以破坏光线在导光板内部发生的全反射，通过出光面出射出光线。通过各种疏密、大小不一的导光点，可使导光板均匀发光。
现有的背光模组中，包括以下部件：胶框1、导光板2(LGP)、LED3及柔性线路板4(FPC)。一般的，LED3和FPC4上的pad通过焊锡焊接在一起，可看做一个整体。请参阅图1和图2，一般会在胶框上设置多个支撑柱11，当LED3和胶框1组合时，LED3放置在相邻两个支撑柱11之间，通常在中间放置一层双面胶，使两个部件粘合固定。此外，有的导光板2通常会设有斜坡部分以减小平面主板部分的厚度，FPC4置于LGP2上侧以便于光路耦合。LGP2通常粘在FPC4上的双面胶上来确保入光侧与LED3耦合。
随着胶框越做越窄，这种突出的柱状结构加工难度增加，并且还难以保证部件组合的稳定性。此外，由于LGP上设有斜坡，FPC与LGP之间的粘合部位相当于一条线，稳定性差，两者会发生相对转动，导致光路耦合失效。
发明内容
本发明提供了一种导光板、背光模组及显示装置，以解决现有技术存在的加工难度大且稳定性差的问题。
为解决上述技术问题，本发明采用的一个技术方案是：提供一种导光板。该导光板的边缘处设有厚度均匀的、用于安装柔性线路板的平台部，所述平台部上设有用于安装LED的安装孔。
其中，所述安装孔靠近所述导光板的边缘的一侧为所述安装孔的外侧，与所述外侧相对的一侧为所述安装孔的内侧。所述导光板包括相对于所述平台部向上凸起的阻挡部，所述阻挡部设在所述安装孔的外侧。
其中，所述导光板还包括依次连接的斜坡部和平面主板部，所述斜坡部位于所述安装孔的内侧，所述平台部的厚度大于所述平面主板部的厚度。
其中，所述阻挡部设有用于放置柔性线路板伸出部分的布线开口。
其中，所述导光板的侧面覆盖有封闭层。
其中，所述封闭层是丝印层。
为解决上述技术问题，本发明采用的另一个技术方案是：提供一种背光模组。该背光模组包括LED、柔性线路板以及上述的导光板，所述LED安装在所述安装孔内，所述柔性线路板安装在所述安装孔上方。
其中，所述柔性线路板通过双面胶粘在所述安装孔所在的平面上。
其中，所述LED和所述柔性线路板上的PAD通过焊锡焊接在一起。
为解决上述技术问题，本发明采用的又一个技术方案是：提供一种显示装置。该显示装置包括显示面板和上述背光模组。
本发明的有益效果是：区别于现有技术的情况，本发明通过在导光板的上设置安装孔，使得LED的安装固定无需再通过胶框，因而无需在胶框上设置支撑柱，只需要在导光板上加工形成安装孔即可，降低了加工难度，有利于降低成本。并且，由于导光板的整体性好，整体尺寸大，挺性好，有利于增强结构强度，因而能提高整个结构的稳定性。另外，在该导光板的边缘处设置平台部，并将安装孔设置在平台部上，柔性线路板可以安装固定在该平台部上，能使柔性线路板与导光板之间的接触由线接触转为面接触，两者就不会发生相对转动，使柔性线路板和导光板之间的稳定性得以加强，因而能更好地实现柔性线路板的定位，并能大大降低发生耦合失效的几率。
附图说明
图1是背景技术中现有的背光模组从安装孔处截面的示意图；
图2是背景技术中现有的背光模组从支撑柱处截面的示意图；
图3是本发明导光板实施例的整体结构示意图；
图4是图3的导光板的边缘处的结构示意图；
图5是图3的导光板的截面结构示意图；
图6是本发明背光模组实施例的结构示意图；
图7是图6的背面的结构示意图；
图8是图6的背光模组的截面结构示意图。
其中，100、导光板；101、平台部；102、安装孔；103、柔性线路板；104、阻挡部；105、LED；106、布线开口；107、斜坡部；108、平面主板部。
具体实施方式
下面结合附图和具体实施方式对本发明进行详细说明。
请参阅图3、图4和图5，其中，图3是本发明导光板实施例的整体结构示意图。图4是图3的导光板的边缘处的结构示意图。图5是图3的导光板的截面结构示意图。
本发明提供一种导光板100，该导光板100的边缘处设有厚度均匀的、用于安装柔性线路板的平台部101，平台部101上设有用于安装LED的安装孔102。
本发明通过在导光板100的上设置安装孔102，使得LED的安装固定无需再通过胶框，因而无需在胶框上设置支撑柱，只需要在导光板100上加工形成安装孔102即可，降低了加工难度，有利于降低成本。并且，由于导光板100的整体性好，整体尺寸大，挺性好，有利于增强结构强度，因而能提高整个结构的稳定性。另外，在该导光板100的边缘处设置平台部101，并将安装孔102设置在平台部101上，柔性线路板可以安装固定在该平台部101上，能使柔性线路板与导光板100之间的接触由线接触转为面接触，两者就不会发生相对转动，使柔性线路板和导光板100之间的连接的稳定性得以加强，因而能更好地实现柔性线路板的定位，并能大大降低发生耦合失效的几率。
另一个实施例中，导光板100还设置有阻挡部104。具体地，安装孔102靠近导光板100的边缘的一侧为安装孔102的外侧，与外侧相对的一侧为安装孔102的内侧。导光板100包括相对于平台部101向上凸起的阻挡部104，阻挡部104设在安装孔102的外侧。阻挡部104的作用主要是从侧面固定柔性线路板，使该柔性线路板的安装更加稳定。阻挡部104上还设有用于放置柔性线路板伸出部分的布线开口106，从而方便布线。
本实施例与上述实施例的区别在于，本实施例的导光板100还包括斜坡部107和平面主板部108。
具体地，安装孔102靠近导光板100的边缘的一侧为安装孔102的外侧，与外侧相对的一侧为安装孔102的内侧。斜坡部107位于安装孔102的内侧，平台部101的厚度大于平面主板部108的厚度。平台部101仅设置在设有LED的一端，平台部101与平面主板部108之间通过斜坡部107进行连接，这样设计主要是为了减小导光板100的厚度，从而减小整个导光板100的厚度，进而能减小产品的体积。当然，该导光板100还可以是平面导光板，也可以是上表面为斜面的导光板。
此外，导光板100的侧面以及其它不需要出光的面覆盖有封闭层，该封闭层可以是丝印层，例如白色丝印层或者黑色丝印层，用于反光或者遮光。该封闭层的设置适用于上述任意一个实施例中的导光板100。
请参阅图6、图7和图8，其中，图6是本发明背光模组实施例的边缘处的结构示意图。图7是图6的背面的结构示意图。图8是图6的背光模组的截面结构示意图。
本发明还提供了一种背光模组，该背光模组包括LED105、柔性线路板103以及导光板100。
导光板100的边缘处设有厚度均匀的、用于安装柔性线路板103的平台部101，平台部101上设有用于安装LED105的安装孔102。安装孔102靠近导光板100的边缘的一侧为安装孔102的外侧，与外侧相对的一侧为安装孔102的内侧。LED105固定在导光板100上的安装孔102里，能使得背光模组更加稳定。LED105和柔性线路板103上的PAD通过焊锡焊接在一起。柔性线路板103通过双面胶粘在平台部101上。由于柔性线路板103与平台部101的粘合部位是一个面，因而两者之间的连接更加稳定。
本发明的导光板100可以是多种形状的导光板100，例如平面的导光板100，上表面是斜面的导光板100等。在本实施例中，安装孔102的内侧依次设有斜坡部107和平面主板部108，平面主板部108的厚度小于平台部101的厚度。平面主板部108与平台部101通过斜坡部107连接在一起。在安装孔102的外侧还设有阻挡部104，阻挡部104相对于平台部101向上凸起。其主要作用是从侧面固定柔性线路板103，使该背光模组的结构更加稳定。
本发明进一步提供了一种显示装置，该显示装置包括显示面板和上述背光模组。
以上所述仅为本发明的实施方式，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)

1.一种导光板，其特征在于，所述导光板的边缘处设有厚度均匀的、用于安装柔性线路板的平台部，所述平台部上设有用于安装LED的安装孔，其中，所述平台部将所述安装孔包围，所述安装孔靠近所述导光板的边缘的一侧为所述安装孔的外侧，与所述外侧相对的一侧为所述安装孔的内侧；
所述导光板包括相对于所述平台部向上凸起的阻挡部，所述阻挡部设在所述安装孔的外侧，所述阻挡部用于从侧面固定所述柔性线路板，使得所述柔性线路板的安装更加稳定；
所述导光板还包括斜坡部和平面主板部，所述平台部的厚度大于所述平面主板部的厚度，所述斜坡部位于所述安装孔的内侧，并连接在所述平台部和所述平面主板部之间。
2.根据权利要求1所述的导光板，其特征在于，所述阻挡部设有用于放置柔性线路板伸出部分的布线开口。
3.根据权利要求1所述的导光板，其特征在于，所述导光板的侧面覆盖有封闭层。
4.根据权利要求3所述的导光板，其特征在于，所述封闭层是丝印层。
5.一种背光模组，其特征在于，包括LED、柔性线路板以及权利要求1至4任一项所述的导光板，所述LED安装在所述安装孔内，所述柔性线路板安装在所述平台部上。
6.根据权利要求5所述的背光模组，其特征在于，所述柔性线路板通过双面胶粘在所述平台部上。
7.根据权利要求5所述的背光模组，其特征在于，所述LED和所述柔性线路板上的PAD通过焊锡焊接在一起。
8.一种显示装置，其特征在于，包括显示面板和权利要求5所述的背光模组。
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