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CN104613389A - 背光模组及具有该背光模组的液晶显示装置 - Google Patents

背光模组及具有该背光模组的液晶显示装置 Download PDF

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CN104613389A
CN104613389A CN201510092210.2A CN201510092210A CN104613389A CN 104613389 A CN104613389 A CN 104613389A CN 201510092210 A CN201510092210 A CN 201510092210A CN 104613389 A CN104613389 A CN 104613389A
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backlight module
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阙成文
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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 CN201510092210.2A priority Critical patent/CN104613389A/zh
Publication of CN104613389A publication Critical patent/CN104613389A/zh
Priority to US14/888,157 priority patent/US20160377788A1/en
Priority to PCT/CN2015/079246 priority patent/WO2016138699A1/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
    • G02B6/0015—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/002—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it by shaping at least a portion of the light guide, e.g. with collimating, focussing or diverging surfaces
    • G02B6/0021—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it by shaping at least a portion of the light guide, e.g. with collimating, focussing or diverging surfaces for housing at least a part of the light source, e.g. by forming holes or recesses
    • 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
    • F21V19/00—Fastening of light sources or lamp holders
    • F21V19/001—Fastening of light sources or lamp holders the light sources being semiconductors devices, e.g. LEDs
    • 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
    • F21V9/00—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters
    • F21V9/40—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters with provision for controlling spectral properties, e.g. colour, or intensity
    • 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
    • G02B6/0015—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/0016—Grooves, prisms, gratings, scattering particles or rough surfaces
    • 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
    • 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
    • G02B6/0026—Wavelength selective element, sheet or layer, e.g. filter or grating
    • 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
    • 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
    • G02B6/0066—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
    • 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
    • G02F1/133614—Illuminating devices using photoluminescence, e.g. phosphors illuminated by UV or blue light

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  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
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  • Spectroscopy & Molecular Physics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
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  • Crystallography & Structural Chemistry (AREA)
  • Planar Illumination Modules (AREA)

Abstract

本发明公开一种背光模组，包括导光板(21)，所述导光板(21)具有入光侧面(211)，在所述入光侧面(211)上设置多个V形沟槽(22、24)，在所述V形沟槽(22、24)的斜面(221、241)的正对位置处设置发光组件(23)。本发明还公开一种具有该背光模组的液晶显示装置。本发明的背光模组及具有该背光模组的液晶显示装置，能够有效地提高背光模组的出光亮度。

Description

背光模组及具有该背光模组的液晶显示装置
技术领域
本发明属于液晶显示技术领域，具体地讲，涉及一种能够提高出光亮度的背光模组及具有该背光模组的液晶显示装置。
背景技术
在现有的液晶显示装置中，通常采用白光发光二极管(LED)作为背光光源，通过导光板和光学膜片的合理搭配实现液晶所需的背光。随着人们对高色域、高色彩饱和度、节能的要求越来越高，目前背光中实现白光光源、高色域、高色彩饱和度的方案有：利用紫外LED配合RGB荧光粉实现；利用蓝光LED配合红绿荧光粉；利用蓝光LED加绿光LED加红光LED等。这些方案都可以提高色域，但是实施起来较为困难，并且成本较高。
量子点(Quantum Dot，简称QD)技术，是把电子束缚在一定范围内的半导体纳米材料结构技术，其由尺寸大小在1～100nm的超小化合物结晶体构成。在量子点技术中，可利用不同尺寸大小的结晶体控制光的波长，进而精确控制光的颜色。因此，量子点材料被应用于背光模组中，采用高频谱光源(例如蓝光LED)取代传统白光LED光源，量子点材料在高频光源的照射小，可被激光产生不同波长的光，通过调整量子点材料的尺寸大小，即可调节合成光的颜色，实现高色域的液晶显示装置的背光要求。
图1是一种现有的采用量子点玻璃管的背光模组。参照图1，将蓝光发光二极管(LED)11设置在导光板12的入光侧面121的正对面处，量子点被封装在玻璃管内形成量子点玻璃管13，其中，量子点玻璃管13设置在蓝光LED11与导光板12的入光侧面121之间。蓝光LED11发出的蓝光经过量子点玻璃管13照射到导光板12的入光侧面121上。然而，当采用这种方式时，量子点玻璃管13对蓝光LED11发出的光线具有较大的损耗，从而导致图1所示的背光模组的出光亮度较低。
发明内容
为了解决上述现有技术存在的问题，本发明的目的在于提供一种背光模组，包括导光板，所述导光板具有入光侧面，在所述入光侧面上设置多个V形沟槽，在所述V形沟槽的斜面的正对位置处设置发光组件。
进一步地，所述多个V形沟槽沿所述导光板的宽度方向等间隔排列设置在所述入光侧面上。
进一步地，所述V形沟槽为对称沟槽。
进一步地，所述V形沟槽的两个斜面的正对位置处分别设置所述发光组件。
进一步地，所述V形沟槽为非对称沟槽。
进一步地，所述多个V形沟槽以所述入光侧面的中心法线对称设置。
进一步地，所述V形沟槽的长斜面的正对位置处设置发光组件。
进一步地，所述V形沟槽的短斜面上设置有反射层。
进一步地，所述发光组件包括电路板、设置在所述电路板上的至少一发光二极管及与所述电路板正对设置的量子点玻璃管，所述电路板与所述V形沟槽的斜面正对设置，所述量子点玻璃管设置在所述电路板与所述V形沟槽的斜面之间，其中，所述量子点玻璃管将所述发光二极管发出的光转换为白色光。
本发明的另一目的还在于提供一种液晶显示装置，包括上述的背光模组。
本发明的背光模组及具有该背光模组的液晶显示装置，能够有效地提高背光模组的出光亮度。
附图说明
通过结合附图进行的以下描述，本发明的实施例的上述和其它方面、特点和优点将变得更加清楚，附图中：
图1是一种现有的采用量子点玻璃管的背光模组；
图2是根据本发明的液晶显示装置的结构示意图；
图3是根据本发明的第一实施例的背光模组的俯视局部示意图；
图4是根据本发明的第二实施例的背光模组的俯视局部示意图。
具体实施方式
以下，将参照附图来详细描述本发明的实施例。然而，可以以许多不同的形式来实施本发明，并且本发明不应该被解释为限制于这里阐述的具体实施例。相反，提供这些实施例是为了解释本发明的原理及其实际应用，从而使本领域的其他技术人员能够理解本发明的各种实施例和适合于特定预期应用的各种修改。
图2是根据本发明的液晶显示装置的结构示意图。
参照图2，根据本发明的液晶显示装置包括液晶显示面板10及与液晶显示面板10相对设置的背光模组20，其中，背光模组20提供显示光源给液晶显示面板10，以使液晶显示面板10显示影像。
液晶显示面板10通常包括薄膜晶体管(Thin Film Transistor，简称TFT)阵列基板101、与TFT阵列基板相对设置的彩色滤光片(Color Filter，简称CF)基板102以及夹设于TFT阵列基板101与CF基板102之间的液晶层103，其中，液晶层103中包括若干液晶分子。由于本实施例的液晶显示面板10的具体结构与现有技术的液晶显示面板的结构大体相同，所以在此不再详细描述。
以下将对根据本发明的背光模组20的具体结构进行详细的描述。
图3是根据本发明的第一实施例的背光模组的俯视局部示意图。
参照图3，根据本发明的第一实施例的背光模组20包括导光板21，该导光板21具有入光侧面211，在入光侧面211上设置多个V形沟槽22，在该V形沟槽22的斜面的正对位置处设置发光组件23。
进一步地，多个V形沟槽22沿导光板21的宽度方向等间隔排列设置在入光侧面211上，但本发明并不局限于此。
在本实施例中，优选地，V形沟槽22为对称沟槽，也就是说，V形沟槽22的两个斜面221左右对称。
此外，进一步地，分别在每个V形沟槽22的两个斜面221的正对位置处设置发光组件23。这样，通过在入光侧面211上设置多个V形沟槽22，并在每个V形沟槽22的两个斜面221的正对位置处设置发光组件23，从而增加发光组件23的数量，以提高根据本发明的第一实施例的背光模组的出光亮度。
另外，根据本发明的第一实施例的发光组件23包括电路板231、设置在电路板231上的两个发光二极管(例如，蓝光发光二极管)232及与电路板231正对设置的量子点玻璃管233，其中，电路板231与对应的V形沟槽22的斜面221正对设置，量子点玻璃管233设置在电路板231与V形沟槽22的斜面221之间，量子点玻璃管233将发光二极管232发出的光转换为白色光。应当说明的是，在本发明中，发光二极管232的数量并不以图3中所示为限。
图4是根据本发明的第二实施例的背光模组的俯视局部示意图。
参照图4，根据本发明的第二实施例的背光模组包括导光板21，该导光板21具有入光侧面211，在入光侧面211上设置多个V形沟槽24，在该V形沟槽24的斜面的正对位置处设置发光组件23。
在本实施例中，V形沟槽24为非对称沟槽。此外，所述多个非对称的V形沟槽24以入光侧面211的中心法线对称设置。
此外，进一步地，在每个V形沟槽24的长斜面241的正对位置处设置发光组件23。这样，通过在入光侧面211上设置多个V形沟槽24，并在每个V形沟槽24的长斜面241的正对位置处设置发光组件23，从而增加发光组件23的数量，以提高根据本发明的第二实施例的背光模组的出光亮度。此外，在每个V形沟槽24的短斜面242上设置有反射层25，该反射层25用于将入射至短斜面242上的光线反射回导光板21中，以提高光线利用率。
另外，根据本发明的第二实施例的发光组件23包括电路板231、设置在电路板231上的两个发光二极管(例如，蓝光发光二极管)232及与电路板231正对设置的量子点玻璃管233，其中，电路板231与对应的V形沟槽24的斜面221正对设置，量子点玻璃管233设置在电路板231与V形沟槽24的斜面221之间，量子点玻璃管233将发光二极管232发出的光转换为白色光。应当说明的是，在本发明中，发光二极管232的数量并不以图4中所示为限。
虽然已经参照特定实施例示出并描述了本发明，但是本领域的技术人员将理解：在不脱离由权利要求及其等同物限定的本发明的精神和范围的情况下，可在此进行形式和细节上的各种变化。

Claims (10)

1.一种背光模组，包括导光板(21)，所述导光板(21)具有入光侧面(211)，其特征在于，在所述入光侧面(211)上设置多个V形沟槽(22、24)，在所述V形沟槽(22、24)的斜面(221、241)的正对位置处设置发光组件(23)。
2.根据权利要求1所述的背光模组，其特征在于，所述多个V形沟槽(22)沿所述导光板(21)的宽度方向等间隔排列设置在所述入光侧面(211)上。
3.根据权利要求1或2所述的背光模组，其特征在于，所述V形沟槽(22)为对称沟槽。
4.根据权利要求3所述的背光模组，其特征在于，所述V形沟槽(22)的两个斜面(221)的正对位置处分别设置所述发光组件(23)。
5.根据权利要求1所述的背光模组，其特征在于，所述V形沟槽(24)为非对称沟槽。
6.根据权利要求5所述的背光模组，其特征在于，所述多个V形沟槽(24)以所述入光侧面(211)的中心法线对称设置。
7.根据权利要求5或6所述的背光模组，其特征在于，所述V形沟槽的长斜面(241)的正对位置处设置发光组件(23)。
8.根据权利要求7所述的背光模组，其特征在于，所述V形沟槽的短斜面(242)上设置有反射层(25)。
9.根据权利要求1所述的背光模组，其特征在于，所述发光组件(23)包括电路板(231)、设置在所述电路板(231)上的至少一发光二极管(232)及与所述电路板(231)正对设置的量子点玻璃管(233)，所述电路板(231)与所述V形沟槽的斜面正对设置，所述量子点玻璃管(233)设置在所述电路板(231)与所述V形沟槽的斜面之间，其中，所述量子点玻璃管(233)将所述发光二极管(232)发出的光转换为白色光。
10.一种液晶显示装置，其特征在于，包括权利要求1至9任一项所述的背光模组。
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