CN104696780B - 背光模组及其光源组件 - Google Patents

背光模组及其光源组件 Download PDF

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CN104696780B
CN104696780B CN201310643429.8A CN201310643429A CN104696780B CN 104696780 B CN104696780 B CN 104696780B CN 201310643429 A CN201310643429 A CN 201310643429A CN 104696780 B CN104696780 B CN 104696780B
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light source
reflecting
substrate
led light
reflecting element
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CN104696780A (zh
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章绍汉
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Fulian Precision Electronics Zhengzhou Co ltd
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Fu Tai Hua Precision Electronic Zhengzhou Co Ltd
Hon Hai Precision Industry Co Ltd
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21SNON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S8/00Lighting devices intended for fixed installation
    • 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
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V13/00Producing particular characteristics or distribution of the light emitted by means of a combination of elements specified in two or more of main groups F21V1/00 - F21V11/00
    • F21V13/02Combinations of only two kinds of elements
    • F21V13/04Combinations of only two kinds of elements the elements being reflectors and refractors
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V17/00Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00Reflectors for light sources
    • F21V7/22Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B19/00Condensers, e.g. light collectors or similar non-imaging optics
    • G02B19/0004Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed
    • G02B19/0019Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed having reflective surfaces only (e.g. louvre systems, systems with multiple planar reflectors)
    • G02B19/0023Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed having reflective surfaces only (e.g. louvre systems, systems with multiple planar reflectors) at least one surface having optical power
    • 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
    • G02F1/133603Direct backlight with LEDs
    • 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
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21YINDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2101/00Point-like light sources
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B19/00Condensers, e.g. light collectors or similar non-imaging optics
    • G02B19/0033Condensers, e.g. light collectors or similar non-imaging optics characterised by the use
    • G02B19/0047Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source
    • G02B19/0061Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source the light source comprising a LED
    • G02B19/0066Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source the light source comprising a LED in the form of an LED array
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00Optical elements other than lenses
    • G02B5/02Diffusing elements; Afocal elements
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00Optical elements other than lenses
    • G02B5/02Diffusing elements; Afocal elements
    • G02B5/0205Diffusing elements; Afocal elements characterised by the diffusing properties
    • G02B5/021Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures
    • G02B5/0231Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures the surface having microprismatic or micropyramidal shape

Abstract

一种光源组件,其包括基板、固定于该基板上的LED光源、第一反射件、第二反射件及扩散板。该第一反射件包括基底部及多个凸起。该基底部固定于该基板上并开设有穿设孔以供该LED光源穿过。该多个凸起凸伸形成于该基底部背离该基板的一侧并相互平行,且每个凸起环绕该穿设孔的周缘延伸。每个凸起邻近该穿设孔的一侧形成有相对该基板倾斜设置的反射面。该第二反射件包括反射部及凸伸形成于该反射部一侧的多个连接部。该多个连接部固定于邻近该穿设孔的凸起的反射面上。该反射部上贯通开设有多个透光孔。该扩散板叠设于该反射部背离该连接部的一侧。上述光源组件出光均匀。本发明还提供应用上述光源组件的背光模组。

Description

背光模组及其光源组件
技术领域
本发明涉及一种应用于液晶显示领域的背光模组,尤其涉及一种直下式背光模组及其光源组件。
背景技术
液晶显示装置是一种被动式显示装置,其不具有发光特性,需要为其提供背光模组以实现显示功能。背光模组按结构可分为侧光式背光模组和直下式背光模组。现有的直下式背光模组包括光学膜片、扩散板、导光板以及光源。扩散板设置于光源的上方,并与光源相距一混光距离,光学膜片设置于扩散板的上方。为使整个背光的亮度均匀,需增大光源与扩散板之间的混光距离。然而这样的背光模组厚度较厚,不利于薄型化设计。
发明内容
鉴于上述内容,有必要提供一种薄型化且出光均匀的背光模组及其光源组件。
一种光源组件,其包括基板、固定于该基板上的LED光源、第一反射件、第二反射件及扩散板。该第一反射件包括基底部及多个凸起,该基底部固定于该基板上并开设有穿设孔以供该LED光源穿过,该多个凸起凸伸形成于该基底部背离该基板的一侧并相互平行,且每个凸起环绕该穿设孔的周缘延伸,每个凸起邻近该穿设孔的一侧形成有相对该基板倾斜设置的反射面,该第二反射件包括反射部及凸伸形成于该反射部一侧的多个连接部,该多个连接部固定于邻近该穿设孔的凸起的反射面上,该反射部上贯通开设有多个透光孔,该扩散板叠设于该反射部背离该连接部的一侧,其中一部分该LED光源正向出射光线直接透过该反射部上的多个透光孔出射至该扩散板,其中另一部该分LED光源正向出射光线通过该反射部反射至该多个凸起,并经由该多个凸起的反射面二次反射为均匀光线出射。
一种背光模组,其包括框体、收容于该框体内的光学膜组件、收容于该框体内并位于该光学膜组件下的多个光源组件。该多个光源组件呈矩阵排列,每个光源组件包括基板,固定于该基板上的LED光源,固定于该基板上的第一反射件,固定于该第一反射件上并罩设于该LED光源上的第二反射件,以及固定于该第二反射件上的扩散板,该第一反射件包括基底部及多个凸起,该基底部固定于该基板上并开设有穿设孔以供该LED光源穿过,该多个凸起凸伸形成于该基底部背离该基板的一侧并相互平行,且每个凸起环绕该穿设孔的周缘延伸,每个凸起邻近该穿设孔的一侧形成有相对该基板倾斜设置的反射面,该第二反射件包括反射部及凸伸形成于该反射部一侧的多个连接部,该多个连接部固定于邻近该穿设孔的凸起的反射面上,该反射部上贯通开设有多个透光孔,该扩散板叠设于该反射部背离该连接部的一侧,其中一部分该LED光源正向出射光线直接透过该反射部上的多个透光孔出射至该扩散板,其中另一部该分LED光源正向出射光线通过该反射部反射至该多个凸起,并经由该多个凸起的反射面二次反射为均匀光线出射。
本发明的背光模组,通过第一反射件与第二反射件的配合反射及扩散板的扩散,使得背光模组获得了出光均匀的效果,且缩短了混光距离,薄化了背光模组。另外通过第二反射件罩设在LED光源上方,可避免出现光源亮点。
附图说明
图1是本发明实施方式的背光模组的分解示意图。
图2是本发明实施方式的光源组件的立体示意图。
图3是图2所示光源组件的分解示意图。
图4是图2所示光源组件的剖视图。
图5是图1所示背光模组使用时的局部剖视图。
图6是图1所示背光模组使用时的俯视图。
主要元件符号说明
背光模组 100
区域 600
框体 10
光学膜片组 20
扩散片 21、24
棱镜片 23
扩散板 25、38
光源组件 30
基板 31
LED光源 33
封装结构 36
第一反射件 361
基底部 3611
穿设孔 3612
凸起 3614
反射面 3615
连接面 3616
第二反射件 363
反射部 3631
透光孔 3632
锥曲面 3633
连接部 3634
凹槽 381
如下具体实施方式将结合上述附图进一步说明本发明。
具体实施方式
请参阅图1,本发明实施方式的背光模组100包括框体10,收容于框体10中的光学膜片组20,以及收容于框体10中并位于光学膜片组20下方的多个光源组件30。多个光源组件30呈矩阵排列。
框体10由具有高反射率的金属或塑料制成。可以理解,框体10还可为涂布有高反射率涂层的金属或塑料制成。
光学膜片组20包括多个光学元件。优先地,多个光学元件为层叠设置的扩散片21、棱镜片23、扩散片24及扩散板25。
请一并参阅图2至图4。每个光源组件30包括基板31,固定于基板31大致中部位置的LED光源33,固定于基板31上并罩设LED光源33的封装结构36,以及固定于封装结构36上的扩散板38。封装结构36大致为矩形,其包括第一反射件361及固定于第一反射件361上的第二反射件363。
第一反射件361大致为矩形,其包括基底部3611及多个凸起3614。基底部3611大致为板状,其固定于基板31上,且其中部贯通开设有穿设孔3612,用于供相应的LED光源33穿过。多个凸起3614凸伸形成基底部3611背离基板31的一侧并相互平行,且每个凸起3614环绕穿设孔3611的周缘延伸。凸起3614的横截面为V形,其包括相互连接的反射面3615及连接面3616,每个连接面3616连接相邻两个凸起3614的反射面3615。反射面3615位于凸起3614邻近穿设孔3612的一侧,连接面3616位于凸起3614背离穿设孔3612的一侧。每个反射面3615相对基板31倾斜设置,每个连接面3616垂直于基板31,且每个凸起3614的反射面3615与其相应的连接面3616的夹角为锐角。本实施方式中,反射面3615为斜面。可以理解,反射面3615还可为曲面。
第二反射件363固定于第一反射件361上,且其位置与穿设孔3612的位置相对应,以遮蔽并反射LED光源33发出的光线。第二反射件363包括反射部3631及凸伸形成于反射部3631一侧的多个连接部3634。多个连接部3634环绕穿设孔3612的周缘间隔固定于邻近穿设孔3612的反射面3615上。反射部3631大致为圆盘状,其中心线与穿设孔3612的中心线相重合。反射部3631邻近穿设孔3612的一侧为一向LED光源33凸出的锥曲面3633。反射部3631贯通锥曲面3633开设有多个透光孔3632,用于部分透射LED光源33发出的光线,以提供第二反射件363上方显示所需的光通量。本实施方式中,第一反射件361及第二反射件363均为具有高反射率的塑胶或金属制成。透光孔3632均匀分布于锥曲面3633上。可以理解,还可于第一反射件361及第二反射件363的表面涂布形成一反射层,以进一步增强其反射能力。第一反射件361及第二反射件363还可一体成型。
扩散板38叠设于反射部3613背离连接部3634的一侧。扩散板38背离反射部3613的一侧凹设形成有多个凹槽381,每个凹槽381的位置与相应透光孔3632的位置相对应,以使LED光源33经透光孔3632透射的光线可由相应的凹槽381均匀射出至光学膜片组20。本实施方式中,扩散板38为透明塑胶板。可以理解,还可在扩散板38中添加扩散离子,以使光线在扩散板38内发生特定的折射、衍射、反射与散射等光学作用,将LED光源33出射光扩散成均匀出射光至光学膜片组20。还可将扩散板38的出光面加工形成粗糙纹路,同样可将LED光源33出射光扩散成均匀出射光至光学膜片组20。
请参阅图5,使用时,LED光源33正向出射光线,其中一部分光线直接透过多个透光孔3632出射至扩散板38,扩散板38将该部分光线扩散为均匀光出射光学膜片组20;其中另一部分光线则通过第二反射件363的锥曲面3633反射至多个凸起3614,并经由凸起3614的反射面3615二次反射为均匀光线出射至光线膜片组20。
本实施方式中,出射至锥曲面3633邻近锥顶的光线反射至远离穿设孔3612的反射面3615上,出射至锥曲面3633远离锥顶的光线反射至邻近穿设孔3612的反射面3615上。可以理解,通过调节锥曲面3633的表面曲率及反射面3615的斜率,可使具有不同发光特性的LED光源33出射的光线均可通过锥曲面3633反射至反射面3615,再二次反射成均匀光出射至光学膜片组20。
可以理解,基板31、LED光源33及封装结构36的组装关系并不限于上述实施方式,还可将多个LED光源呈阵列排布于整块基板31上,每个封装结构36罩设于相应的LED光源33上,只要能使LED光源33发出的光线经封装结构36后可转换为均匀光出射至光学膜片组20即可。
本发明的多个光源组件30呈矩阵排列于背光模组100中,通过设置独立的驱动电路可以独立控制每个光源组件30中的LED光源33的开关状态,使得本发明的背光模组100具有局部点亮的功能。如图6所示,仅开启区域600中的LED光源33(参阅图2),因此,仅区域600对应的液晶显示面板(图未示)被点亮。
本发明的背光模组100,通过第一反射件361与第二反射件363的配合反射及扩散板38的扩散,使得背光模组100获得了出光均匀的效果,且缩短了混光距离,薄化了背光模组100。另外通过第二反射件363罩设在LED光源33上方,避免出现光源亮点;且通过独立的驱动电路独立驱动相应的LED光源33,从而实现局部点亮的功能。
另外,对于本领域的普通技术人员来说,可以根据本发明的技术构思做出其它各种相应的改变与变形,而所有这些改变与变形都应属于本发明权利要求的保护范围。

Claims (10)

1.一种光源组件,其包括基板及固定于该基板上的LED光源,其特征在于:该光源组件还包括第一反射件、第二反射件及扩散板,该第一反射件包括基底部及多个凸起,该基底部固定于该基板上并开设有穿设孔以供该LED光源穿过,该多个凸起凸伸形成于该基底部背离该基板的一侧并相互平行,且每个凸起环绕该穿设孔的周缘延伸,每个凸起邻近该穿设孔的一侧形成有相对该基板倾斜设置的反射面,该第二反射件包括反射部及凸伸形成于该反射部一侧的多个连接部,该多个连接部固定于邻近该穿设孔的凸起的反射面上,该反射部上贯通开设有多个透光孔,该扩散板叠设于该反射部背离该连接部的一侧,其中一部分该LED光源正向出射光线直接透过该反射部上的多个透光孔出射至该扩散板,其中另一部分该LED光源正向出射光线通过该反射部反射至该多个凸起,并经由该多个凸起的反射面二次反射为均匀光线出射。
2.如权利要求1所述的光源组件,其特征在于:该反射部邻近该多个连接部的一侧为朝向该LED光源凸出的锥曲面。
3.如权利要求1所述的光源组件,其特征在于:每个凸起背离穿设孔的一侧形成有垂直于该基板的连接面,每个连接面连接相邻两个凸起的反射面。
4.如权利要求1所述的光源组件,其特征在于:该扩散板背离该反射部的一侧凹设形成有多个凹槽,每个凹槽的位置与相应的透光孔的位置相对应。
5.如权利要求1所述的光源组件,其特征在于:该扩散板内分散有散射离子。
6.如权利要求1所述的光源组件,其特征在于:该扩散板背离该反射部的一侧形成有粗糙纹路。
7.如权利要求1所述的光源组件,其特征在于:该第一反射件及该第二反射件为具有高反射率的塑胶或金属制成。
8.如权利要求1所述的光源组件,其特征在于:该第一反射件及该第二反射件表面均形成有一反射层。
9.如权利要求1所述的光源组件,其特征在于:该第一反射件与该第二反射件一体成型。
10.一种背光模组,其包括框体及收容于该框体内的光学膜组件,其特征在于:该背光模组还包括收容于该框体内并位于该光学膜组件下的多个光源组件,该多个光源组件呈矩阵排列,每个光源组件包括基板,固定于该基板上的LED光源,固定于该基板上的第一反射件,固定于该第一反射件上并罩设于该LED光源上的第二反射件,以及固定于该第二反射件上的扩散板,该第一反射件包括基底部及多个凸起,该基底部固定于该基板上并开设有穿设孔以供该LED光源穿过,该多个凸起凸伸形成于该基底部背离该基板的一侧并相互平行,且每个凸起环绕该穿设孔的周缘延伸,每个凸起邻近该穿设孔的一侧形成有相对该基板倾斜设置的反射面,该第二反射件包括反射部及凸伸形成于该反射部一侧的多个连接部,该多个连接部固定于邻近该穿设孔的凸起的反射面上,该反射部上贯通开设有多个透光孔,该扩散板叠设于该反射部背离该连接部的一侧,其中一部分该LED光源正向出射光线直接透过该反射部上的多个透光孔出射至该扩散板,其中另一部分该LED光源正向出射光线通过该反射部反射至该多个凸起,并经由该多个凸起的反射面二次反射为均匀光线出射。
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