WO2018112999A1 - 一种背光模组 - Google Patents

一种背光模组 Download PDF

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WO2018112999A1
WO2018112999A1 PCT/CN2016/112332 CN2016112332W WO2018112999A1 WO 2018112999 A1 WO2018112999 A1 WO 2018112999A1 CN 2016112332 W CN2016112332 W CN 2016112332W WO 2018112999 A1 WO2018112999 A1 WO 2018112999A1
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backlight module
sheet
light
circuit board
flexible circuit
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PCT/CN2016/112332
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French (fr)
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曾杰
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武汉华星光电技术有限公司
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Priority to US15/327,462 priority Critical patent/US10437088B2/en
Publication of WO2018112999A1 publication Critical patent/WO2018112999A1/zh

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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
    • G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
    • 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
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    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
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    • 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
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    • 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
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    • G—PHYSICS
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    • 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
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    • G02F1/133602—Direct backlight
    • G02F1/133605—Direct backlight including specially adapted reflectors
    • 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
    • G02B6/0031—Reflecting element, sheet or layer
    • 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
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • 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
    • G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
    • G02F1/133314—Back frames
    • 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
    • G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
    • G02F1/133317—Intermediate frames, e.g. between backlight housing and front frame
    • 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
    • G02F1/133608—Direct backlight including particular frames or supporting means
    • 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
    • G02F1/133628—Illuminating devices with cooling means
    • 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
    • G02F2202/00—Materials and properties
    • G02F2202/28—Adhesive materials or arrangements

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  • General Physics & Mathematics (AREA)
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Abstract

一种背光模组，包括灯源柔性电路板（1）；发光二极管(2)，设于灯源柔性电路板(1)的上方；反射片(3)，其设于发光二极管(2)的上方；发光二极管(2)的两侧分别设有胶框(4)和导光板(5)，导光板(5)上方设有光学膜片(6)，反射片(3)的上方设有上石墨片(8)。背光模组结构简单，能够增加光线的利用率，同时具有良好的散热效果。

Description

一种背光模组
相关申请的交叉引用
本申请要求享有于2016年12月20日提交的名称为“一种背光模组”的中国专利申请CN201611183229.9的优先权，该申请的全部内容通过引用并入本文中。
技术领域
本发明涉及液晶显示技术领域，特别涉及一种背光模组。
背景技术
目前，液晶显示装置作为电子设备的显示部件已经广泛的应用于各种电子产品中，而背光模组则是液晶显示装置中的一个重要部件。
一般情况下，如图1所示，一种背光模组包括：胶框10、反射片20、导光板30、光学膜片40、灯源柔性电路板50(FPC)、发光二极管60(LED)以及遮光胶带70等，灯源柔性电路板50和LED 60通过遮光胶70固定于导光板30和胶框10上，光学膜片40通过遮光双面胶带80固定在胶框10上，所述反射片20通过口字型双面胶90贴于胶框10底面；整个背光模组组装完成后，显示屏幕通过遮光胶70与背光贴合，遮光胶70一般为黑黑胶，可吸收背光边缘漏出的光线；在LED60光源侧，会在遮光胶70上面贴合一层PET100，一方面可防止TFT处悬空断裂，另一方面可防止TFT粘在遮光胶而不利于重工。
目前组成背光模组随着手机屏的分辨率越来越高，相应地背光亮度也要升高，一方面背光发光二极管(LED)侧和芯片位置的产热随之增加，另一方面此处亮度增加，漏光风险增加，遮光胶吸收的光线也增加。为防止热量积累对显示产生不良影响，需要在背光模组增加散热结构。
为解决上述问题，有必要提出一种新的背光模组。
发明内容
本发明的背光模组结构简单，能够增加光线的利用率，同时具有良好的散热 效果。
为实现上述目的，本发明提供了一种背光模组，其中，所述背光模组包括：
灯源柔性电路板；
发光二极管，其设于所述灯源柔性电路板的上方；
反射片，其设于所述发光二极管的上方；
所述发光二极管的两侧分别设有胶框和导光板，所述导光板上方设有光学膜片，所述反射片的上方设有上石墨片。
如上所述的背光模组，其中，所述上石墨片的长度小于所述反射片的长度。
如上所述的背光模组，其中，所述胶框与所述灯源柔性电路板相接，所述胶框与所述反射片相接。
如上所述的背光模组，其中，所述光学膜片上方设有遮光胶，所述遮光胶与所述反射片相贴合。
如上所述的背光模组，其中，所述遮光胶与所述石墨片之间存在间隙。
如上所述的背光模组，其中，所述灯源柔性电路板下方设有下石墨片，所述下石墨片与所述导光板相接。
如上所述的背光模组，其中，所述下石墨片通过双面胶贴合在所述导光板上。
如上所述的背光模组，其中，所述反射片通过双面胶贴合在所述胶框上。
如上所述的背光模组，其中，所述灯源柔性电路板通过双面胶贴合在所述胶框上。
如上所述的背光模组，其中，所述光学膜片从上之下依次包括上棱镜片、下棱镜片和扩散片。
本发明的背光模组结构简单，反射片可将反光二极管侧漏出的能够增加光线的利用率，同时这样的结构设置具有良好的散热效果，石墨片一方面可防止薄膜晶体管处悬空破片，另一方面可防止薄膜晶体管粘在遮光胶上无法重工。
上述技术特征可以各种适合的方式组合或由等效的技术特征来替代，只要能够达到本发明的目的。
附图说明
在此描述的附图仅用于解释目的，而不意图以任何方式来限制本发明公开的范围。另外，图中的各部件的形状和比例尺寸等仅为示意性的，用于帮助对本发 明的理解，并不是具体限定本发明各部件的形状和比例尺寸。本领域的技术人员在本发明的教导下，可以根据具体情况选择各种可能的形状和比例尺寸来实施本发明。
图1为现有技术的背光模组的结构示意图；
图2为本发明的背光模组的结构示意图。
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
结合附图和本发明具体实施方式的描述，能够更加清楚地了解本发明的细节。但是，在此描述的本发明的具体实施方式，仅用于解释本发明的目的，而不能以任何方式理解成是对本发明的限制。在本发明的教导下，技术人员可以构想基于本发明的任意可能的变形，这些都应被视为属于本发明的范围，下面将结合附图对本发明作进一步说明。
图1至图2分别为现有技术的背光模组的结构示意图和本发明的背光模组的结构示意图。
如图2所示，本发明的背光模组包括灯源柔性电路板1、发光二极管2、反射片3、胶框4、导光板5、光学膜片6和上石墨片8，其中，发光二极管2设于灯源柔性电路板1的上方，反射片3设于发光二极管2的上方，发光二极管2的两侧分别设有胶框4和导光板5，导光板5上方设有光学膜片6，以及反射片3的上方设有上石墨片8。
本发明的背光模组能够很好地散热，能够有效防止热量积累对显示产生不良的影响，上石墨片8能够很好地将背光LED侧和芯片位置产生的热量扩散出去。
进一步地，在本发明中，上石墨片8的长度小于反射片3，在本发明中，光学膜片6上方设有遮光胶61，遮光胶61末端非贴合在胶框4上，而是贴合至比上石墨片8略长出的反射片3上，在一具体实施例中，遮光胶61与石墨片8之间存在间隙。采用这样的设置方式，反射片3可将漏出的光线反射回导光板6，防止光线漏出，增加光线利用率，上石墨片8既起到散热作用，又起到防止薄膜晶体管(TFT)处悬空断裂，还可防止TFF粘在遮光胶61上而不利于重工。
在本发明中，胶框4与灯源柔性电路板1相接，胶框4还与反射片3相接，在一具体实施例中，反射片3通过双面胶34贴合在胶框4上，灯源柔性电路板1 双面胶14贴合在胶框4上，从而增加本发明的背光模组的稳定性。
进一步地，灯源柔性电路板1下方设有下石墨片9，下石墨片9与导光板6相接，从而进一步地增加背光模组的散热性能，在一具体实施例中，下石墨片9通过双面胶96贴合在导光板6上，从而进一步增加背光模组的稳定性。
在本发明中，光学膜片6从上之下依次包括上棱镜片、下棱镜片和扩散片(图3未示出)。
本发明的背光模组的反射片3可将LED侧漏出的光线反射回导光板5，增加光线利用率，同时上石墨片8既起到散热作用，又起到防止TFT处悬空断裂，还可防止TFF粘在遮光胶61上而不利于重工。
上述技术方案只是本发明的一种实施方式，对于本领域内的技术人员而言，在本发明公开了应用方法和原理的基础上，很容易做出各种类型的改进或变形，而不仅限于本发明上述具体实施方式所描述的方法。虽然已经参考优选实施例对本发明进行了描述，但在不脱离本发明的范围的情况下，可以对其进行各种改进并且可以用等效物替换其中的部件。尤其是，只要不存在结构冲突，各个实施例中所提到的各项技术特征均可以任意方式组合起来。本发明并不局限于文中公开的特定实施例，而是包括落入权利要求的范围内的所有技术方案。

Claims (16)

  1. 一种背光模组，其中，所述背光模组包括：
    灯源柔性电路板；
    发光二极管，其设于所述灯源柔性电路板的上方；
    反射片，其设于所述发光二极管的上方；
    所述发光二极管的两侧分别设有胶框和导光板，所述导光板上方设有光学膜片，所述反射片的上方设有上石墨片。
  2. 如权利要求1所述的背光模组，其中，所述上石墨片的长度小于所述反射片的长度。
  3. 如权利要求1所述的背光模组，其中，所述胶框与所述灯源柔性电路板相接，所述胶框与所述反射片相接。
  4. 如权利要求2所述的背光模组，其中，所述光学膜片上方设有遮光胶，所述遮光胶与所述反射片相贴合。
  5. 如权利要求4所述的背光模组，其中，所述遮光胶与所述石墨片之间存在间隙。
  6. 如权利要求1所述的背光模组，其中，所述灯源柔性电路板下方设有下石墨片，所述下石墨片与所述导光板相接。
  7. 如权利要求6所述的背光模组，其中，所述下石墨片通过双面胶贴合在所述导光板上。
  8. 如权利要求1所述的背光模组，其中，所述反射片通过双面胶贴合在所述胶框上。
  9. 如权利要求1所述的背光模组，其中，所述灯源柔性电路板通过双面胶贴合在所述胶框上。
  10. 如权利要求1所述的背光模组，其中，所述光学膜片从上之下依次包括上棱镜片、下棱镜片和扩散片。
  11. 如权利要求2所述的背光模组，其中，所述灯源柔性电路板下方设有下石墨片，所述下石墨片与所述导光板相接。
  12. 如权利要求11所述的背光模组，其中，所述下石墨片通过双面胶贴合在所述导光板上。
  13. 如权利要求12所述的背光模组，其中，所述光学膜片从上之下依次包括上棱镜片、下棱镜片和扩散片。
  14. 如权利要求11所述的背光模组，其中，所述反射片通过双面胶贴合在所述胶框上。
  15. 如权利要求14所述的背光模组，其中，所述灯源柔性电路板通过双面胶贴合在所述胶框上。
  16. 如权利要求15所述的背光模组，其中，所述光学膜片从上之下依次包括上棱镜片、下棱镜片和扩散片。
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CN107229160A (zh) * 2017-06-28 2017-10-03 武汉华星光电技术有限公司 一种背光模组及液晶显示装置
CN107102479A (zh) * 2017-06-30 2017-08-29 武汉华星光电技术有限公司 背光模组及显示装置
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CN109870848B (zh) * 2019-03-13 2022-11-25 厦门天马微电子有限公司 一种背光模组及显示装置
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