CN110646974A - 一种背光模组 - Google Patents

一种背光模组 Download PDF

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CN110646974A
CN110646974A CN201910819467.1A CN201910819467A CN110646974A CN 110646974 A CN110646974 A CN 110646974A CN 201910819467 A CN201910819467 A CN 201910819467A CN 110646974 A CN110646974 A CN 110646974A
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light
sheet
guide plate
diffusion sheet
backlight module
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任杰
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Shenzhen Naze Photoelectric Co Ltd
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Shenzhen Naze Photoelectric Co Ltd
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    • 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
    • G02F1/133615Edge-illuminating devices, i.e. illuminating from the side
    • 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
    • G02F1/133605Direct backlight including specially adapted reflectors
    • 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
    • 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
    • G02F1/133611Direct backlight including means for improving the brightness uniformity
    • 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)
  • 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

本发明公开了一种背光模组,包括外面板、上扩散片、集光片、下扩散片、导光板、反射片、反射罩和光源灯组,所述外面板、上扩散片、集光片、下扩散片从上到下依次设置,设置在模组保护壳中;所述导光板两侧设置有反射罩,反射罩中设置有光源灯组,所述反射罩与模组保护壳相互固定;所述导光板为亚克力塑料制成,表面光滑;所述反射片固定在模组保护壳底部,导光板设置在反射片上方;所述反射罩截面呈半椭圆环结构,且光源灯组处于椭圆结构的焦点处;本发明将光源灯组的光反射入导光板中,再经由反射片、集光片、扩散片共同作用,在外面板上供应充足的亮度与分布均匀的光源,使其能正常显示影像,具有亮度高,寿命长、发光均匀的优点。

Description

一种背光模组
技术领域
本发明涉及背光模组显示技术领域,具体为一种背光模组。
背景技术
随着显示技术的迅速发展,液晶显示装置因其具有轻、薄、小等特点,而且具有功耗低、无辐射、制造成本相对较低等优点,因此在目前的平板显示领域占主导地位,其已被广泛应用于各种信息、通讯及消费性产品中。由于液晶显示装置中的液晶显示面板本身不具有发光特性,因而,为调整液晶显示装置的亮度,需要给液晶显示装置中的液晶显示面板提供一面光源装置,如背光模组,用于向液晶显示面板提供亮度充分且分布均匀的光束。
现有的背光模组,存在灯组光源光线聚集度较差,光源利用率交底,为了保证亮度,通过增加光源功率来实现,但是随之而来的则是高功率的散热问题,给使用者带来较大不便。
发明内容
本发明的目的在于提供一种背光模组,以解决上述背景技术中提出的问题。
为实现上述目的,本发明提供如下技术方案:一种背光模组,包括外面板、上扩散片、集光片、下扩散片、导光板、反射片、反射罩和光源灯组,所述外面板、上扩散片、集光片、下扩散片、导光板从上到下依次设置,设置在模组保护壳中;所述导光板两侧设置有反射罩,反射罩中设置有光源灯组,所述反射罩与模组保护壳相互固定;所述导光板为亚克力塑料制成,表面光滑;所述反射片固定在模组保护壳底部,导光板设置在反射片上方;所述反射罩截面呈半椭圆环结构,所述光源灯组处于椭圆结构的焦点处。
优选的,所述外面板为TN面板、VA面板、IPS面板、CPA面板中的任意一种。
优选的,所述上扩散片包括上涂层、支撑层和下涂层,所述支撑层由PET塑料组成,上涂层为光扩散剂涂层,下涂层为防静电剂涂层。
优选的,所述上涂层中使用光扩散剂为纳米硫酸钡、碳酸钙、二氧化硅中的一种或多种混合,扩散剂尺寸为10~20μm;所述下涂层中所使用的防静电剂为纳米碳化硅、纳米氧化铝、纳米氧化铟锡中的一种或多种混合。
优选的,所述下扩散片的结构与上扩散片结构相同,且上扩散片、下扩散片厚度之比为1:0.5~0.8。
优选的,所述集光片为上侧设置有三角形的连续棱带,所述棱带截面为等腰三角形,三角形顶角为50°~70°,所述集光片厚度为100~200μm。
优选的,所述反射罩内侧设置有真空镀铝层,且所述真空镀铝层厚度不超过10μm。
优选的,所述反射罩的椭圆形结构的短轴、长轴之比为1:1~1.5,且长轴与反射片相互平行,光源灯组设置在反射罩内部的焦点处。
优选的,所述反射片底部设置有散热层,所述散热层由铝片、铜片组成,散热层贴着模组保护壳底部设置。
优选的,所述光源灯组为管状的冷阴极荧光灯。
与现有技术相比,本发明的有益效果是:本发明能够充分将光源灯组的光反射入导光板中,再经由反射片、集光片、扩散片共同作用,最终在外面板上供应充足的亮度与分布均匀的光源,使其能正常显示影像,具有亮度高,寿命长、发光均匀的优点。
附图说明
图1为本发明的结构示意图;
图2为本发明的上扩散片结构示意图;
图中标号:1、外面板;2、上扩散片;21、上涂层;22、支撑层;23、下涂层;3、集光片;31、棱带;4、下扩散片;5、导光板;6、反射片;7、模组保护壳;8、反射罩;9、光源灯组。
具体实施方式
下面将结合本发明实施例中的附图,对本发明实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例仅仅是本发明一部分实施例,而不是全部的实施例。基于本发明中的实施例,本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例,都属于本发明保护的范围。
在本发明的描述中,需要说明的是,术语“竖直”、“上”、“下”、“水平”等指示的方位或位置关系为基于附图所示的方位或位置关系,仅是为了便于描述本发明和简化描述,而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作,因此不能理解为对本发明的限制。
在本发明的描述中,还需要说明的是,除非另有明确的规定和限定,术语“设置”、“安装”、“相连”、“连接”应做广义理解,例如,可以是固定连接,也可以是可拆卸连接,或一体地连接;可以是机械连接,也可以是电连接;可以是直接相连,也可以通过中间媒介间接相连,可以是两个元件内部的连通。对于本领域的普通技术人员而言,可以根据具体情况理解上述术语在本发明中的具体含义。
请参阅图1-2,本发明提供一种技术方案:一种背光模组,包括外面板1、上扩散片2、集光片3、下扩散片4、导光板5、反射片6、反射罩8和光源灯组9,所述外面板1、上扩散片2、集光片3、下扩散片4、导光板5从上到下依次设置,设置在模组保护壳7中;所述导光板5两侧设置有反射罩8,反射罩8中设置有光源灯组9,所述反射罩8与模组保护壳7相互固定;所述导光板5为亚克力塑料制成,表面光滑;所述反射片6固定在模组保护壳7底部,导光板5设置在反射片6上方;所述反射罩8截面呈半椭圆环结构,所述光源灯组9处于椭圆结构的焦点处。
进一步的,所述外面板1为TN面板、VA面板、IPS面板、CPA面板中的任意一种。
进一步的,所述上扩散片2包括上涂层21、支撑层22和下涂层23,所述支撑层22由PET塑料组成,上涂层21为光扩散剂涂层,下涂层23为防静电剂涂层。
进一步的,所述上涂层21中使用光扩散剂为纳米硫酸钡、碳酸钙、二氧化硅中的一种或多种混合,光扩散剂尺寸为10~20μm;所述下涂层23中所使用的防静电剂为纳米碳化硅、纳米氧化铝、纳米氧化铟锡中的一种或多种混合。
进一步的,所述下扩散片4的结构与上扩散片2结构相同,且上扩散片2、下扩散片4厚度之比为1:0.5~0.8。
进一步的,所述集光片3为上侧设置有三角形的连续棱带31,所述棱带31截面为等腰三角形,三角形顶角为50°~70°,所述集光片3厚度为100~200μm。
进一步的,所述反射罩8内侧设置有真空镀铝层,且所述真空镀铝层厚度不超过10μm。
进一步的,所述反射罩8的椭圆形结构的短轴、长轴之比为1:1~1.5,且长轴与反射片6相互平行,光源灯组9设置在反射罩8内部的焦点处。
进一步的,所述反射片6底部设置有散热层,所述散热层由铝片、铜片组成,散热层贴着模组保护壳7底部设置。
进一步的,所述光源灯组9为管状的冷阴极荧光灯。
工作原理:在实际使用时,通过打开光源灯组9的开关,冷阴极荧光灯照明发出光照,光线在反射罩8的反射下,进入导光板5,在底部反射片6的作用下,利用扩散反射的原理,增加光线的可利用率;光线从导光板5中穿出后,进入下扩散片4中,使光源均匀扩散;光线进入集光片3中,对光线汇集,从而增加屏幕亮度,之后进入上扩散片2中,最终使外面板1显亮。
在上扩散片2、下扩散片4上下侧分别设置对应的涂层,上侧添加光扩散剂涂层,增强光的扩散;下侧添加防静电剂涂层,用于防止工作过程中的静电干扰光照。在集光片3为上侧设置有三角形的连续棱带31,通过三角的棱带31结构,对光折射,使之汇集;反射罩8内侧设置有真空镀铝层,真空镀铝层结构对光的反射效果好,将光源灯组9设置在椭圆形反射罩8的焦点处,能够使光线被充分反射。在反射片6下侧,设置散热层,散热层由铝片或铜片组成,散热层贴合模组保护壳7底部设置,并从模组保护壳7中穿出,便于灯组发热经由模组保护壳7向外散发出去,能够提供一个良好的工作环境,便于光源灯组9的长时间工作。
尽管已经示出和描述了本发明的实施例,对于本领域的普通技术人员而言,可以理解在不脱离本发明的原理和精神的情况下可以对这些实施例进行多种变化、修改、替换和变型,本发明的范围由所附权利要求及其等同物限定。

Claims (10)

1.一种背光模组,其特征在于:包括外面板(1)、上扩散片(2)、集光片(3)、下扩散片(4)、导光板(5)、反射片(6)、反射罩(8)和光源灯组(9),所述外面板(1)、上扩散片(2)、集光片(3)、下扩散片(4)、导光板(5)从上到下依次设置,设置在模组保护壳(7)中;所述导光板(5)两侧设置有反射罩(8),反射罩(8)中设置有光源灯组(9),所述反射罩(8)与模组保护壳(7)相互固定;所述导光板(5)为亚克力塑料制成,表面光滑;所述反射片(6)固定在模组保护壳(7)底部,导光板(5)设置在反射片(6)上方;所述反射罩(8)截面呈半椭圆环结构,所述光源灯组(9)处于椭圆结构的焦点处。
2.根据权利要求1所述的一种背光模组,其特征在于:所述外面板(1)为TN面板、VA面板、IPS面板、CPA面板中的任意一种。
3.根据权利要求1所述的一种背光模组,其特征在于:所述上扩散片(2)包括上涂层(21)、支撑层(22)和下涂层(23),所述支撑层(22)由PET塑料组成,上涂层(21)为光扩散剂涂层,下涂层(23)为防静电剂涂层。
4.根据权利要求3所述的一种背光模组,其特征在于:所述上涂层(21)中使用光扩散剂为纳米硫酸钡、碳酸钙、二氧化硅中的一种或多种混合,扩散剂尺寸为10~20μm;所述下涂层(23)中所使用的防静电剂为纳米碳化硅、纳米氧化铝、纳米氧化铟锡中的一种或多种混合。
5.根据权利要求3所述的一种背光模组,其特征在于:所述下扩散片(4)的结构与上扩散片(2)结构相同,且上扩散片(2)、下扩散片(4)厚度之比为1:0.5~0.8。
6.根据权利要求1所述的一种背光模组,其特征在于:所述集光片(3)为上侧设置有三角形的连续棱带(31),所述棱带(31)截面为等腰三角形,三角形顶角为50°~70°,所述集光片(3)厚度为100~200μm。
7.根据权利要求1所述的一种背光模组,其特征在于:所述反射罩(8)内侧设置有真空镀铝层,且所述真空镀铝层厚度不超过10μm。
8.根据权利要求1所述的一种背光模组,其特征在于:所述反射罩(8)的椭圆形结构的短轴、长轴之比为1:1~1.5,且长轴与反射片(6)相互平行,光源灯组(9)设置在反射罩(8)内部的焦点处。
9.根据权利要求1所述的一种背光模组,其特征在于:所述反射片(6)底部设置有散热层,所述散热层由铝片、铜片组成,散热层贴着模组保护壳(7)底部设置。
10.根据权利要求1所述的一种背光模组,其特征在于:所述光源灯组(9)为管状的冷阴极荧光灯。
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CN206133057U (zh) * 2016-09-14 2017-04-26 深圳跃升电子有限公司 一种用于背光模块的反射件
CN206249274U (zh) * 2016-10-21 2017-06-13 广州视源电子科技股份有限公司 交互智能平板及背光模组

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US20030123248A1 (en) * 2001-12-29 2003-07-03 Lg.Philips Lcd Co., Ltd. Backlight device and method of fabricating the same
TW200811541A (en) * 2006-08-30 2008-03-01 Univacco Technology Inc Producing method of diffusion films and backlights in the producing method thereof
CN102829959A (zh) * 2012-08-16 2012-12-19 京东方科技集团股份有限公司 一种导光板透过率光谱的测试装置及方法
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