CN104471468B - 显示设备 - Google Patents
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- CN104471468B CN104471468B CN201280074767.8A CN201280074767A CN104471468B CN 104471468 B CN104471468 B CN 104471468B CN 201280074767 A CN201280074767 A CN 201280074767A CN 104471468 B CN104471468 B CN 104471468B
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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
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133608—Direct backlight including particular frames or supporting means
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- 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
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- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133524—Light-guides, e.g. fibre-optic bundles, louvered or jalousie light-guides
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- 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
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- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133553—Reflecting elements
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- 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
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- G02F1/1339—Gaskets; Spacers; Sealing of cells
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- 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
- G02F1/133603—Direct backlight with LEDs
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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
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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
- 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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- 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
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Abstract
根据本发明的一个实施方式的显示设备包括:显示板;和从显示板的下侧提供光的背光单元,并且该背光单元包括:底盖;光源模块,该光源模块安装在该底盖上并且包括:多个光源和上面安装有该多个光源的电路板;反射层,该反射层安装在光源模块上侧以将从多个光源发出的光朝向显示板反射;遮光层,该屏蔽层布置在从反射层向上分开一定距离的位置处,并且具有多个构图孔使得从反射层反射的光的仅一部分被透过;以及间隔体,该间隔体插在反射层与遮光层之间,以形成由反射层与遮光层之间的空置空间限定的光导层,并且维持光导层的均匀高度。
Description
技术领域
本发明涉及显示设备。
背景技术
对于显示设备的各种需求随着信息社会的发展而增加,并且响应于这些需求,目前已经开发并使用了各种显示设备(诸如液晶显示器(LCD)、等离子体显示显示板(PDP)、电致发光显示器(ELD)和真空荧光显示器(VFD))。
其中,LCD的液晶显示板包括液晶层、彼此相对的TFT基板和滤色器基板(该TFT基板与滤色器基板之间具有液晶层),并且因为液晶显示板不是自发光的,所以可以使用从背光单元提供的光来显示图像。
安装在背光单元处的光源可以是发光二极管(LED)芯片和包括至少一个LED芯片的LED封装(package)中的一个。
目前,平面荧光灯(FFL)或表面光源(SLS)积极地应用于用于LCD显示板的光源。表面光源被理解为具有均匀发亮的表面而无厚度的光源,并且因为通过使用表面光源而使背光单元变薄,所以可以实现显示设备的薄度。
而且,构造背光单元的光导层通常被填充有单独的透明树脂,但是目前提出了包括具有真空状态或空气层的光导层的背光单元。
发明内容
技术问题
实施方式提供了包括具有空置空间的光导层的背光单元,其中,背光单元具有支撑结构,该支撑结构支撑设置在光导层上的各种光学片,使得光导层的高度被均匀地维持。
技术方案
在一种实施方式中,一种显示设备包括:显示板;和从显示板的下侧提供光的背光单元,其中,背光单元包括:底盖;光源模块,该光源模块安装在底盖上并且包括:以均匀间隔排列的多个光源和上面安装有多个光源的电路板;反射层,该反射层设置在光源模块上方以将从光源发出的光朝向显示板反射;屏蔽(screening)层,该屏蔽层布置在反射层上方距其一定距离,并且具有多个构图孔以允许只透射从反射层反射的光的一部分;以及间隔体,该间隔体布置在反射层与屏蔽层之间,以形成由反射层与屏蔽层之间的空置空间限定的光导层,并且维持光导层的均匀高度。
有益效果
具有上述构造的实施方式具有的优点在于很好地维持包括内部具有空置空间的光导层的背光单元的形状并且均匀地维持光导层的高度。
而且,其还具有的优点在于起支撑物作用的间隔体透射、折射和反射从光源发出的光,以使背光单元的发光均匀。
附图说明
图1是根据第一实施方式的显示设备的分解立体图。
图2是显示设备的纵向截面图。
图3是如何安装根据第一实施方式的间隔体的平面图。
图4是根据第二实施方式的间隔体的立体图。
图5是如何布置根据第二实施方式的间隔体的平面图。
图6是根据第三实施方式的间隔体的立体图。
图7是如何布置根据第三实施方式的间隔体的平面图。
图8是根据第四实施方式的间隔体的立体图。
图9是如何布置根据第四实施方式的间隔体的平面图。
图10是根据第五实施方式的间隔体的立体图。
图11是如何布置根据第五实施方式的间隔体的纵向截面图。
具体实施方式
下面将参照附图详细描述根据实施方式的显示设备。
图1是根据第一实施方式的显示设备的分解立体图,图2是显示设备的纵向截面图,并且图3是如何安装根据第一实施方式的间隔体的平面图。
参照图1至图3,根据第一实施方式的显示设备10包括底盖16、设置在底盖16上的背光单元20、以及设置在背光单元20的顶面上的液晶显示板。
具体地,背光单元20包括设置在底盖16的顶面上的光源模块、保持在光源模块上的反射层23、设置在反射层23的顶面上的间隔体25、以及设置在间隔体25的顶面上的屏蔽层15。另外,内部包括空置空间的光导层24形成在反射层23与屏蔽层15之间。光导层24可以具有真空状态或空气层。在该示例中,屏蔽层15可以被理解为用于背光单元20的组件或者被理解为用于液晶显示板的组件。
更详细地,光源模块包括设置在底盖16的顶面上的电路板21和表面安装在电路板21上的光源22。光源22包括发光二极管(LED)封装。另外,上面保持电路板21的安装凹部161纵向形成在底盖16的顶面上。光源模块可以被设置为使得多个光源22以特定间隔安装在电路板21上,并且多个光源模块可以以均匀的间隔并排布置在底盖16的顶面上。而且,相邻光源模块的光源22也可以布置成锯齿线或者布置在同一条线上。实施方式示出了相邻光源模块的光源布置成锯齿线。
而且,光源22被形成为使得一对电极222穿过子安装板,包括LED的发光元件223安装在电极222上,并且发光元件223被荧光层224围绕,该荧光层224通过将荧光材料与硅树脂混合而获得。另外,荧光层224的顶面是平坦成型的,并且由反射材料形成的反射层225布置在荧光层224的顶面上。反射层225可以是通过使用树脂将苯丙醇胺(PPA)、环氧树脂化合物(EMC)、微单元聚对苯二甲酸乙二醇酯(MCPET)、银(Ag)、具有优秀反射率的铝(Al)金属与具有反射、透射或折射特性的、诸如Ti、Al、Ag、或SiO2等的珠子混合而制造的材料。从发光元件223向上发出的光被经由反射层225反射到荧光层224的侧面。在该示例中,发光元件223是蓝色LED,构造荧光层的荧光材料由YAG磷光剂形成,由此可以从光源22发出白光。
设置在光源模块上的反射层23覆盖电路板24,并且在与光源22的位置对应的区域中形成通孔231。另外,光源22穿过通孔231并且从反射层23突出。另外,粘合剂17涂敷于电路板21的底面和反射层23的底面,使得电路板固定于底盖16的安装凹部161并且反射层23固定于电路板21。
而且,间隔体25作用于维持屏蔽层15与光源22之间的恒定距离,并且如图2所示,间隔体延伸以具有与光导层24的设计高度对应的高度和与反射层23的长度对应的长度。另外,间隔体25还可以具有如图2所示的直线延伸条的形状,或者多个短肋以均匀间隔沿反射层23的长度方向排列的形状。
详细地,间隔体25可以由聚碳酸酯(PC)、聚甲基丙烯酸甲酯(PMMA)、玻璃、树脂、苯丙醇胺(PPA)、或铝(Al)金属形成,以具有对光透射、折射或反射的特性。另外,可以通过将粘合剂涂敷到间隔体25的顶面和底面然后进行UV固化或热固化来安装间隔体25。
屏蔽层15是只透射从光源22垂直且向上发出的光的一部分并将剩余部分反射回去的反射片,并且多个屏蔽图案可以形成在屏蔽层上。存在于本实施方式中的屏蔽层15是孔构图的反射片,上面形成有多个孔151。即,从光源22发出或从反射层23反射的光穿过孔151,并且撞击在其它区域上的光被反射回反射层23或撞击在间隔体25上以被折射或反射。另外,孔151的半径随着远离光源22的中心部逐步增大,使得在远离光源22的点,所透射的光量大于被反射的光量。原因是因为光的强度随着靠近光源22而逐步变强,并且随着远离光源22而逐步变弱,并且为了在显示板的各个部分均匀地维持发光,所透射的光量可以随着远离光源22而逐步增加,并且随着靠近光源22而逐步减少。
而且,液晶显示板(即显示板)设置在屏蔽层15上,该液晶显示板包括扩散层11、下偏光器12、滤色器基板13、以及诸如上偏光器14等的光学片。因为显示板的结构和功能与典型的平面型显示板的结构和功能相同,所以不再提供详细描述。
因为间隔体25如图1至图3所示布置在屏蔽层15与反射层23之间,所以可以保持光导层24的高度不变,并且可以防止包括屏蔽层15的显示板下沉(sagging)。另外,因为光导层24被维持为空置空间,所以存在可以提高光散射效率的优点。
下面描述可以以另一种形式呈现的间隔体。因为除间隔体之外的组件与第一实施方式中呈现的那些相同,所以不再提供重复性描述。
图4是根据第二实施方式的间隔体的立体图,并且图5是如何布置根据第二实施方式的间隔体的平面图。
参照图4和图5,根据第二实施方式的间隔体35可以如图4和5所示设置为圆环的形状。
详细地,间隔体35包括间隔体主体351,该间隔体主体351围绕光源并且具有圆环形状;和连接肋352,该连接肋352垂直地连接相邻的间隔体主体351。光源22可以以均匀的水平间隔直线布置,并且间隔体主体351也可以直线布置以由连接肋352连接。
图6是根据第三实施方式的间隔体的立体图,并且图7是如何布置根据第三实施方式的间隔体的平面图。
参照图6和图7,如第二实施方式,根据第三实施方式的间隔体45包括具有圆环形状的间隔体主体451和连接间隔体主体的连接肋452。然而,区别在于垂直和水平相邻的间隔体主体451不像第二实施方式那样由连接肋452连接。
具体地,与第二实施方式不同,光源22布置成锯齿线并且垂直相邻的间隔体主体451由连接肋452连接于横向相邻的间隔体主体451,使得间隔体主体整体形成三角形。当光源22垂直和水平地布置在同一条线上时,间隔体45会形成四边形。
图8是根据第四实施方式的间隔体的立体图,并且图9是如何布置根据第四实施方式的间隔体的平面图。
参照图8和图9,根据本实施方式的间隔体55与第三实施方式中的间隔体相同,但区别在于间隔体主体551是多边形而不是圆形的。另外,相邻的间隔体主体551由连接肋552连接。在该示例中,应当注意的是,多边形间隔体主体551不限于所呈现的六边形,而可以包括所有多边形,其中包括三角形。
图10是根据第五实施方式的间隔体的立体图,并且图11是如何布置根据第五实施方式的间隔体的纵向截面图。
参照图10和图11,根据本实施方式的间隔体65具有为了减小连接反射层23和屏蔽层15时的高度差而提出的形状。
具体地,保持屏蔽层15距光源22的高度不变在确保背光结构的发光均匀性方面起重要作用。由此,使间隔体成型成具有不变高度是非常重要的。然而,在具有单一高度的注塑成型的间隔体的情况下,难以排除根据间隔体上的位置而存在高度差的可能性。例如,在将具有10mm长的顶面的间隔体与具有5mm长的顶面的间隔体进行比较时,存在高度差的可能性别无选择而只会随着间隔体的长度增加而增加。为了使存在高度差的可能性最小化,提出使与多个部分(即,屏蔽层15和反射层23)直接接触(以在制造过程中均匀地维持高度)的表面的长度比间隔体的长度短并且将剩余部分填充粘合剂。
用于实现这样的目的的间隔体651包括间隔体主体、从间隔体主体651的顶面和底面突出的多个突起652、以及形成在多个突起652之间的凹部653。
具体地,间隔体主体651的垂直宽度可以小于屏蔽层24的高度,并且间隔体可以被成型成使得突起652从间隔体主体651的顶面和底面突出。然后,还在相邻的突起652之间形成凹部653。
相反,间隔体主体651的高度可以小于屏蔽层24的高度,并且多个凹部653可以形成在间隔体主体651的顶面和底面上。
而且,间隔体65可以如图10所示形成为圆环形状,并且还可以形成为第一实施方式至第四实施方式中所呈现的形状。另外,在间隔体65布置在屏蔽层15与反射层23之间的同时,将粘合剂17涂敷于间隔体65的顶面和底面。在该示例中,与其它部分相比,更大量的粘合剂17涂敷于凹部653。另外,因为凹部653的高度经由粘合剂17被维持为与突起652的高度相等,所以屏蔽层15形成光导层24的平整顶面。即,在凹部653区域处,间隔体65的高度由粘合剂17补偿。由于通过这种结构在间隔体上存在精确控制高度的部分和其它部分,所以存在可以使反射层23与屏蔽层15之间的高度差最小化的效果。
Claims (14)
1.一种显示设备,该显示设备包括:
显示板;和
从所述显示板的下侧提供光的背光单元,
其中,所述背光单元包括:
底盖;
光源模块,该光源模块安装在所述底盖上并且包括:
以均匀间隔排列的多个光源;和
上面安装有所述多个光源的电路板;
第一反射层,该第一反射层设置在所述光源模块上方以将从所述光源发出的光朝向所述显示板反射;
屏蔽层,该屏蔽层布置在所述第一反射层上方距其一定距离,并且具有多个构图孔,以允许只透射从所述第一反射层反射的所述光的一部分;以及
间隔体,该间隔体布置在所述第一反射层与所述屏蔽层之间,以形成由所述第一反射层与所述屏蔽层之间的空置空间限定的光导层,并且维持所述光导层的均匀高度,
其中,所述间隔体包括多个突起和多个凹部,所述多个突起和所述多个凹部交替形成在所述间隔体的顶面和底面上,
其中,所述多个突起由粘合剂粘合于所述第一反射层和所述屏蔽层。
2.根据权利要求1所述的显示设备,其中,所述间隔体由从由聚碳酸酯PC、聚甲基丙烯酸甲酯PMMA、玻璃、树脂、苯丙醇胺PPA、铝Al金属组成的组中选择的至少一种形成,以具有光被透射、折射或反射的特性。
3.根据权利要求2所述的显示设备,其中,所述间隔体设置在相邻的光源之间并且具有连续或间断延伸的直线条形的形状。
4.根据权利要求2所述的显示设备,其中,所述间隔体包括:
具有围绕所述光源的环形的多个间隔体主体;以及
连接相邻的间隔体主体的多个连接肋。
5.根据权利要求4所述的显示设备,其中,沿前后方向彼此相邻的所述间隔体主体由所述连接肋连接。
6.根据权利要求4所述的显示设备,其中,沿前后方向和左右方向彼此相邻的所述间隔体主体由所述连接肋连接。
7.根据权利要求4所述的显示设备,其中,所述间隔体主体包括圆环或多边形环的形状。
8.根据权利要求1所述的显示设备,其中,所述多个凹部填充有所述粘合剂,以具有与所述多个突起相同的高度。
9.根据权利要求1所述的显示设备,其中,在所述底盖中形成有多个安装凹部,以允许安装所述光源,
并且其中,所述多个安装凹部彼此分开预定距离地布置。
10.根据权利要求1所述的显示设备,其中,在所述第一反射层上与所述光源的位置对应的预定位置处形成有使所述光源穿过的通孔,并且穿过所述通孔的所述光源露出到所述光导层并且处于所述光导层内。
11.根据权利要求1所述的显示设备,其中,所述构图孔的直径被构造成随着远离所述光源而逐步增大。
12.根据权利要求1所述的显示设备,其中,所述光源包括发光二极管LED封装,
其中,所述LED封装包括:
LED元件;
荧光层,该荧光层围绕所述LED元件并且具有平整顶面;以及
第二反射层,该第二反射层设置在所述荧光层的顶面上。
13.根据权利要求2所述的显示设备,其中,粘合剂涂敷于所述间隔体的顶面和底面,
并且其中,所述间隔体的所述顶面和底面被UV固化或热固化,以分别粘合于所述第一反射层和所述屏蔽层。
14.根据权利要求10所述的显示设备,其中,安装在相邻光源模块上的所述光源被布置成锯齿线。
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