CN104534304A - 背光模组以及液晶显示器 - Google Patents

背光模组以及液晶显示器 Download PDF

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CN104534304A
CN104534304A CN201410725060.XA CN201410725060A CN104534304A CN 104534304 A CN104534304 A CN 104534304A CN 201410725060 A CN201410725060 A CN 201410725060A CN 104534304 A CN104534304 A CN 104534304A
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backlight module
reflecting component
light source
guide plate
light
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周革革
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TCL China Star Optoelectronics Technology Co Ltd
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Shenzhen China Star Optoelectronics Technology Co Ltd
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Priority to CN201410725060.XA priority Critical patent/CN104534304A/zh
Priority to US14/417,996 priority patent/US9910204B2/en
Priority to PCT/CN2014/094825 priority patent/WO2016086473A1/zh
Publication of CN104534304A publication Critical patent/CN104534304A/zh
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S8/00—Lighting devices intended for fixed installation
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V13/00—Producing 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
    • F21V13/02—Combinations of only two kinds of elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V23/00—Arrangement of electric circuit elements in or on lighting devices
    • F21V23/003—Arrangement of electric circuit elements in or on lighting devices the elements being electronics drivers or controllers for operating the light source, e.g. for a LED array
    • 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
    • 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
    • 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
    • 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
    • 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
    • G02F1/133605—Direct backlight including specially adapted reflectors
    • 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
    • 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
    • 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

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  • Crystallography & Structural Chemistry (AREA)
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  • Planar Illumination Modules (AREA)

Abstract

本发明涉及背光模组以及液晶显示器。该背光模组包括导光板和设置在导光板的入光侧的光源。光源包括多个直线式间隔设置的发光点，在光源的远离导光板的反光侧内正对相邻发光点之间的间隔设置有反光件，反光件将照射到间隔内的散射光反射到导光板内。根据本发明的背光模组，光源区域的亮度非常均匀，从而从根本上减弱甚至消除了液晶显示了上的高亮点。

Description

背光模组以及液晶显示器
技术领域
本发明涉及液晶显示领域，特别涉及一种背光模组。本发明还涉及包括这种背光模组的液晶显示器。
背景技术
液晶显示器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。在液晶显示器中，液晶本身并不发光而是其能够对来自背光模组的光进行调制，从而显示出图形或字符。因此，背光模组的结构会直接影响晶显示器的显示效果。
在现有技术中，根据光源与导光板之间的位置关系，可将背光模组分为下置式和侧置式(或侧光式)。侧置式的背光模组使得液晶显示器更加轻薄，从而侧置式的背光模组的使用也最为广泛。侧置式的背光模组通常包括：导光板、处于导光板下方的反射片和处于导光板侧部的光源。光源发出的光从导光板的侧部进入导光板，并经导光板引导后照亮整个面板。
目前，窄边框的液晶显示器越来越流行。随着液晶显示器的边框越来越窄，在液晶显示器的设置光源的区域极易出现高亮点，这极大地影响了液晶显示器的品质。
发明内容
针对上述问题，本发明提出了一种背光模组。根据本发明的背光模组，光源区域的亮度非常均匀，从而从根本上减弱甚至消除了液晶显示了上的高亮点。本发明还提出了包括这种背光模组的液晶显示器。
根据本发明的第一方面，背光模组包括导光板和设置在导光板的入光侧的光源，光源包括多个直线式间隔设置的发光点，在光源的远离导光板的反光侧内正对相邻发光点之间的间隔设置有反光件，该反光件将照射到该间隔内的散射光反射到导光板内。
根据本发明的背光模组，由于反光件会将照射到间隔内的光反射到导光板内，因此会降低甚至消除发光点与间隔之间的亮度差，大幅提高光源区域的亮度的均匀性，导光板内的光线也更加均匀，从而减弱甚至消除了液晶显示器上的高亮点。
在一个实施例中，反光件为凹面件，散射光经过凹面件的焦点照射到凹面件上。使用凹面结构的反光件并且使散射光经过这种反光件的焦点，能够使沿各个方向的散射光变成平行光照射到导光板内。对于导光板而言，来自间隔的入射光与来自发光点的入射光的方向完全相同，导光板因此能完全相同地传导这两种入射光，从而进一步提高了液晶显示器的亮度的均匀性。
在一个实施例中，该光源模组还包括设置在导光板下方的朝向反光件延伸并与反光件接触的反射片。反射片能够将从导光板下方出射的光再次反射到导光板内，以进一步提高液晶显示器的亮度。
在一个优选的实施例中，反射片与反光件的接触区处于反光侧内。这样，由接触区产生的反射光也能够经反光件再次反射而进入到导光板内，从而有助于提高液晶显示器的亮度。
在另一个实施例中，反射片与反光件为一个整体。这样，可以防止反光件发生意外移位。
在一个实施例中，背光模组还包括设置在反光侧内的胶框，反光件处于胶框和光源之间。
在一个优选的实施例中，反光件设置在胶框的正对相邻发光点之间的间隔的区域上。根据这种结构，胶框对反光件起到支撑和限位作用，可防止反光件意外发生移位。此外，可使用现有技术中的贴装设备将反光件安装在胶框上，从而大大方便了反光件的安装。
在一个实施例中，在胶框的正对相邻发光点之间的间隔的区域上设置有凹面结构，反光件通过在凹面结构上涂覆反光层而制成。根据这种结构，反光件与胶框形成为一个整体，这完全避免了反光件的意外移位问题，提高了液晶显示器的显示性能的可靠性；而且也省去了反光件的安装过程，大大提高了生产效率。
在一个实施例中，背光模组还包括与光源电连接的光源电路板。
根据本发明的第二方面，提出了一种液晶显示器，其包括根据上文所述的背光模组。
在本申请中，方位用语“前”是指朝向液晶显示器的面板的方向。方位用语“后”是指与“前”相反的方向，即朝向液晶显示器的背板的方向。
与现有技术相比，本发明的优点在于：(1)在本发明的背光模组中，由于反光件会将照射到间隔内的光反射到导光板内，因此就降低甚至消除了发光点与间隔之间的亮度差，大幅提高了光源区域的亮度的均匀性，导光板内的光线也更加均匀，从而减弱甚至消除了液晶显示了上的高亮点。(2)反光件为凹面件，其使得各个方向的散射光变成平行光照射到导光板内，这有助于进一步提高液晶显示器的亮度的均匀性。
附图说明
在下文中将基于实施例并参考附图来对本发明进行更详细的描述。其中：
图1显示了根据本发明的背光模组的第一实施例的结构示意图。
图2是根据本发明的液晶显示器的示意图。
图3显示了图1的A-A方向的视图的局部。
图4显示了根据本发明的背光模组的第二实施例的结构示意图。
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
下面将结合附图对本发明作进一步说明。
图1示意性地显示了根据本发明第一实施例的背光模组10。如图1所示，背光模组10包括导光板101和设置在导光板101的入光侧的光源102。在导光板101的上方设置有用于显示画面的光学膜片115。光源102处于导光板101的侧部，因此背光模组10为侧置式。图2显示了包括根据本发明的背光模组10(或下文第二实施例的背光模组40)的液晶显示器20，在其中示意性地显示了背光模组的安装区201和可视区202。
背光模组10还包括与光源102电连接的光源电路板105，以给光源102供电；还包括胶框103，胶框103设置在光源102的远离导光板101的一侧(即下文所述的反光侧104)。从图1中可看到，胶框103和导光板101分别处于光源102的两侧。胶框103用于将导光板101、光源102和光源电路板105等装配在一起。导光板101、光学膜片115以及光源电路板105的具体结构和安装方式均是本领域的技术人员所熟知的，这里不再赘述。
下面将对背光模组10的结构进行详细描述。
图3显示了图1的A-A方向的视图的局部。如图3所示，光源102包括多个发光点106，并且这些发光点106为直线式间隔设置。也就是说，这些发光点106沿一条直线设置，并且在相邻的发光点之间存在有间隔107。优选地，发光点106可以为发光LED(即发光二极管)。
在间隔107处没有光射出，即在光源102内，发光点106和间隔107形成明暗对比强烈的区域，这有可能导致导光板101内的光不均匀并最终导致液晶显示器20上会出现高亮点。为此，在反光侧104内正对相邻发光点之间的间隔107设置了反光件108，即反光件108处于光源102和胶框103之间(如图1所示)。反光件108会将照射到间隔107内的散射光109反射到导光板101内，即反光件108类似于处于间隔107区域的光源，这样就降低甚至消除了光源102内发光点106与间隔107之间的亮度差，导光板101内的光线也更加均匀，从而能避免液晶显示器20上出现高亮点。
优选地，反光件108固定设置在胶框103上并且正对间隔107。这样，胶框103就对反光件108起到支撑和限位作用，可防止反光件108意外发生移位。
还如图1所示，反光件108可为凹面件。优选地，将反光件108设置为凹面朝向发光点106，并且散射光109经过反光件108的焦点照射到凹面件上。这样，反光件108能够把沿各个方向的散射光109收集起来，并且梳理成平行光110以照射到导光板101的入光侧。平行光110与发光点106直接照射到导光板101的入光侧的光111相平行，因此导光板101因此能完全相同地传导这两种入射光，从而进一步提高了液晶显示器20的亮度的均匀性。
返回到图1，光源模组10还包括设置在导光板101下方的反射片112。反射片112用于将从导光板101下方出射的光再次反射到导光板101的内部，以提高液晶显示器20的亮度。
在本发明的光源模组10中，反射片112朝向反光件108延伸并且与其接触。优选地，反射片112与反光件108的接触区113处于反光侧104内。这样，由接触区113产生的反射光会经反光件108再次反射而进入到导光板101内，从而有助于提高液晶显示器20的亮度。
还可以将反射片112与反光件108一体成型。由于反射片112被稳定地安装在导光板101的下方并且不会移位，因此反光件108也不会发生移位，即彻底避免了反光件108发生意外移位，所生产的液晶显示器20在显示效果方面也就会具有良好的稳定性。
图4显示了根据本发明另一实施例的背光模组40。背光模组40的结构与图1所示的背光模组10的结构大体相同，下面仅描述不同之处。
如图4所示，在胶框103的正对间隔107的区域上设置有凹面结构401。通过在凹面结构401上涂覆反光层而制备成上文所述的反光件108。在这种结构中，反光件108与胶框103成为一个整体，彻底避免了反光件108的意外移位问题。由于在光源102和胶框103之间也不再有任何部件，从而可以将液晶显示器20的边框制作的非常窄，甚至可以制造成无边框。另外，由于实际上不存在单独的反光件108，在生产液晶显示器20时，也就省去了反光件的安装过程，大大提高了液晶显示器20的生产效率。
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 (10)

1.一种背光模组，包括导光板和设置在所述导光板的入光侧的光源，
其中，所述光源包括多个直线式间隔设置的发光点，在所述光源的远离所述导光板的反光侧内正对相邻发光点之间的间隔设置有反光件，所述反光件将照射到所述间隔内的散射光反射到所述导光板内。
2.根据权利要求1所述的背光模组，其特征在于，所述反光件为凹面件，所述散射光经过所述凹面件的焦点照射到所述凹面件上。
3.根据权利要求2所述的背光模组，其特征在于，还包括设置在所述导光板下方的朝向所述反光件延伸并与所述反光件接触的反射片。
4.根据权利要求3所述的背光模组，其特征在于，所述反射片与反光件的接触区处于所述反光侧内。
5.根据权利要求3所述的背光模组，其特征在于，所述反射片与所述反光件为一个整体。
6.根据权利要求2所述的背光模组，其特征在于，还包括设置在所述反光侧内的胶框，所述反光件处于所述胶框和所述光源之间。
7.根据权利要求6所述的背光模组，其特征在于，所述反光件设置在所述胶框的正对相邻发光点之间的间隔的区域上。
8.根据权利要求6所述的背光模组，其特征在于，在所述胶框的正对相邻发光点之间的间隔的区域上设置有凹面结构，所述反光件通过在所述凹面结构上涂覆反光层而制成。
9.根据权利要求1到8中任一项所述的背光模组，其特征在于，还包括与所述光源电连接的光源电路板。
10.一种液晶显示器，其包括根据权利要求1到9中任一项所述的背光模组。
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