CN111538186A - 一种背光模组及其制备方法、液晶显示装置 - Google Patents

一种背光模组及其制备方法、液晶显示装置 Download PDF

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CN111538186A
CN111538186A CN202010424752.6A CN202010424752A CN111538186A CN 111538186 A CN111538186 A CN 111538186A CN 202010424752 A CN202010424752 A CN 202010424752A CN 111538186 A CN111538186 A CN 111538186A
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light
backlight module
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查宝
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TCL China Star Optoelectronics Technology Co Ltd
TCL Huaxing Photoelectric Technology 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
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011Light 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
    • G02B6/0033Means for improving the coupling-out of light from the light guide
    • G02B6/005Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G02B6/0051Diffusing sheet or layer
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011Light 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
    • G02B6/0033Means for improving the coupling-out of light from the light guide
    • G02B6/005Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G02B6/0055Reflecting element, sheet or layer
    • 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
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    • 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
    • G02F1/133608Direct backlight including particular frames or supporting means
    • 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
    • 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
    • G02F1/133614Illuminating devices using photoluminescence, e.g. phosphors illuminated by UV or blue light

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Abstract

本揭示提供一种背光模组及其制备方法以及液晶显示装置。背光模组包括背板、光源、光转换涂层。所述背板设置有容纳腔和固定构件。所述光源设置在所述容纳腔内,且由所述固定构件固定。所述光转换涂层,涂覆在所述光源上。其中,所述光转换涂层包括荧光粉和光吸收因子,所述光吸收因子用于吸收特定频段的光。以进一步提升KSF背光的色域。

Description

一种背光模组及其制备方法、液晶显示装置
技术领域
本揭示涉及显示技术领域,尤其涉及一种背光模组及其制备方法、液晶显示装置。
背景技术
显示技术的发展过程也是对色彩再现能力的追求,从第一代的色域规格sRGB到DCI-P3,一直到下一代的BT.2020,色域都在提升。高色域意味着电视能够显示出更加丰富多彩的色彩,具有更强的色彩展现能力,可以有效避免在显示的时候出现失真和色块的情况。DCI-P3的色域规格被视为取代sRGB的下一代色域规格,是一种应用于数字影院的色域,它是一种以人类视觉体验为主导的色域标准,尽可能匹配电影场景中能展现的全部色域。相较于sRGB,拥有更广阔的红色和绿色系范围。
目前针对DCI-P3的色域规格,通过量子点技术可以实现高阶的DCI-P3达到99%,但是量子点技术的成本高居不下。而且,量子点技术中需使用的重金属镉,也限制着其广泛使用。而一般的KSF背光目前可以使DCI-P3最高达到95%,要到达高阶的DCI-P3色域规格依旧比较困难。
因此,需进一步提升KSF背光的色域问题需要解决。
发明内容
本揭示提供一种背光模组及其制备方法以及液晶显示装置,以缓解需进一步提升KSF背光的色域的技术问题。
为解决上述问题,本揭示提供的技术方案如下:
本揭示实施例提供一种背光模组,其包括背板、光源、光转换涂层。所述背板设置有容纳腔和固定构件。所述光源设置在所述容纳腔内,且由所述固定构件固定。所述光转换涂层,涂覆在所述光源上。其中,所述光转换涂层包括荧光粉和光吸收因子,所述光吸收因子用于吸收特定频段的光。
在本揭示实施例提供的背光模组中,所述荧光粉包括绿色荧光粉和KSF荧光粉。
在本揭示实施例提供的背光模组中,所述光吸收因子包括罗丹明类染料、亚酞菁类染料或四氮杂卟啉类染料中的至少一种有机染料。
在本揭示实施例提供的背光模组中所述特定频段的光的波长范围为580纳米至610纳米。
在本揭示实施例提供的背光模组中,所述背光模组的背光方式为侧入式背光,所述背光模组还包括设置于所述容纳腔内的反射片和导光板,其中所述反射片设置于所述容纳腔底部,所述导光板设置于所述反射片上,且所述光源位于所述导光板的一侧。
在本揭示实施例提供的背光模组中,所述背光模组的背光方式为直下式背光,所述背光模组还包括设置于所述容纳腔内的下扩散片及上扩散片,所述下扩散片设置于所述光源上方,所述上扩散片设置于所述下扩散片上方。
本揭示实施例还提供一种背光模组制备方法,其包括以下步骤:步骤S10、提供一背板,在所述背板上形成容纳腔和固定构件。步骤S20、提供一光源,在所述光源上涂覆光转换涂层。步骤S30、通过所述固定构件把涂覆有所述光转换涂层的所述光源固定在所述容纳腔内。
在本揭示实施例提供的背光模组制备方法中,所述光转换涂层包括荧光粉和光吸收因子,其中所述荧光粉包括绿色荧光粉和KSF荧光粉,所述光吸收因子包括罗丹明类染料、亚酞菁类染料或四氮杂卟啉类染料中的至少一种有机染料。
在本揭示实施例提供的背光模组制备方法中,所述绿色荧光粉、所述KSF荧光粉及所述光吸收因子的掺杂比例分别为x、y、1-x-y,其中x为50%至70%,y为20%至45%,且x+y小于1。
本揭示实施例还提供一种液晶显示装置,其包括前述实施例其中之一所述的背光模组、设置于所述背光模组上的液晶显示面板、设置于所述背光模组和所述液晶显示面板之间的下偏光片及设置于所述液晶显示面板上的上偏光片。
本揭示的有益效果为:本揭示提供的背光模组及其制备方法以及液晶显示装置中,在光源上涂覆的光转换涂层包括荧光粉和光吸收因子,荧光粉用于提升色域,光吸收因子可以吸收特定频段的黄橙光,进一步提升了色域。同时液晶显示装置的彩色滤光片中红光和绿光的重叠区也在黄橙光的波长区域内,光吸收因子可以吸收此重叠区的光,提纯了红光和绿光。
附图说明
为了更清楚地说明实施例或现有技术中的技术方案,下面将对实施例或现有技术描述中所需要使用的附图作简单介绍,显而易见地,下面描述中的附图仅仅是发明的一些实施例,对于本领域普通技术人员来讲,在不付出创造性劳动的前提下,还可以根据这些附图获得其他的附图。
图1为本揭示实施例提供的背光模组的第一种结构示意图;
图2为本揭示实施例提供的掺杂有光吸收因子的背光的频谱示意图;
图3为本揭示实施例提供的背光模组的第二种结构示意图;
图4为本揭示实施例提供背光模组制备方法的流程示意图;
图5为本揭示实施例提供的液晶显示装置的侧视示意图;
图6为本揭示实施例提供的液晶显示面板的侧视示意图。
具体实施方式
以下各实施例的说明是参考附加的图示,用以例示本揭示可用以实施的特定实施例。本揭示所提到的方向用语,例如[上]、[下]、[前]、[后]、[左]、[右]、[内]、[外]、[侧面]等,仅是参考附加图式的方向。因此,使用的方向用语是用以说明及理解本揭示,而非用以限制本揭示。在图中,结构相似的单元是用以相同标号表示。
在一种实施例中,如图1所示,提供一种背光模组100,其包括背板10、光源20、光转换涂层30。所述背板10设置有容纳腔11和固定构件12。所述光源20设置在所述容纳腔11内,且由所述固定构件12固定。所述光转换涂层30涂覆在所述光源20上。其中,所述光转换涂层30包括荧光粉和光吸收因子,所述光吸收因子用于吸收特定频段的光。
具体的,所述背光模组100的背光方式为侧入式背光,所述背光模组还包括设置于所述容纳腔内的反射片40和导光板50,其中所述反射片40设置于所述容纳腔11底部,所述导光板50设置于所述反射片40上,且所述光源20位于所述导光板50的一侧。所述光源20和所述导光板50在同一水平面上,所述光源20发出的光射向所述导光板50的侧面。
进一步的,所述荧光粉包括绿色荧光粉和KSF荧光粉。
进一步的,所述光吸收因子包括罗丹明类染料、亚酞菁类染料或四氮杂卟啉类染料等中的至少一种有机染料。所述光吸收因子可以吸收波长范围在580纳米至610纳米的光。黄橙光的波长范围即为580纳米至610纳米。
具体的,把罗丹明类染料、亚酞菁类染料或四氮杂卟啉类染料等中的至少一种有机染料分散在硅胶中,然后和绿色荧光粉和KSF荧光粉按照一定比例掺杂在一起,涂覆在所述光源上作为光转换涂层。
进一步的,所述绿色荧光粉、所述KSF荧光粉及所述光吸收因子的掺杂比例分别为x、y、1-x-y,其中x为50%至70%,y为20%至45%,且x+y小于1。
进一步的,所述光源为蓝光LED。
进一步的,掺杂有光吸收因子的光转换涂层涂覆在所述光源上形成的背光频谱图如图2所示。在图2中,掺杂有光吸收因子的背光的频谱曲线B与没有掺杂光吸收因子的KSF背光频谱曲线A对比可知,在黄橙光的波长区域580纳米至610纳米内,掺杂有光吸收因子的背光的波峰明显低于没有掺杂光吸收因子的KSF背光的波峰。
具体的,所述光源发出的光在经过所述光转换涂层后,其中波长范围在580纳米至610纳米的黄橙光,被所述光转换涂层中的光吸收因子吸收。没被所述光转换涂层中的光吸收因子吸收的光,经过所述光转涂层后射向所述导光板,所述导光板改变光的方向,改变方向的光射向光学膜片。
在本实施例中,通过设置掺杂有光吸收因子的光转换涂层,并涂覆在光源上,以吸收光源发出的黄橙光,以进一步提升色域。
在一种实施例中,与上述实施例不同的是,如图3所述,所述背光模组101的背光方式为直下式背光,所述背光模组101还包括设置于所述容纳腔11’内的下扩散片60及上扩散片70,所述下扩散片60设置于所述光源20’上方,所述上扩散片70设置于所述下扩散片60上方。
具体的,所述光源20’为蓝光LED。所述光源20’由所述固定构件12’固定在所述容纳腔11’内。所述光源20’发出的光在经过所述光转换涂层30’后,其中波长范围在580纳米至610纳米的黄橙光,被所述光转换涂层30’中的光吸收因子吸收。没被所述光转换涂层30’中的光吸收因子吸收的光,经过所述光转涂层30’后射向所述下扩散片60。经过所述下扩散片60的光射向所述上扩散片70。其他说明请参照上述实施例,在此不再赘述。
在一种实施例中,提供一种背光模组制备方法,如图4所述,包括以下步骤:
步骤S10、提供一背板,在所述背板上形成容纳腔和固定构件;
步骤S20、提供一光源,在所述光源上涂覆光转换涂层;
步骤S30、通过所述固定构件把涂覆有所述光转换涂层的所述光源固定在所述容纳腔内。
具体的,所述光转换涂层包括荧光粉和光吸收因子,其中所述荧光粉包括绿色荧光粉和KSF荧光粉,所述光吸收因子包括罗丹明类染料、亚酞菁类染料或四氮杂卟啉类染料中的至少一种有机染料。
具体的,把罗丹明类染料、亚酞菁类染料或四氮杂卟啉类染料等中的至少一种有机染料分散在硅胶中,然后和绿色荧光粉和KSF荧光粉按照一定比例掺杂在一起,涂覆在所述光源上作为光转换涂层。
进一步的,所述绿色荧光粉、所述KSF荧光粉及所述光吸收因子的掺杂比例分别为x、y、1-x-y,其中x为50%至70%,y为20%至45%,且x+y小于1。
进一步的,所述光源可以设置成侧入式或直下式。
在一种实施例中,提供一种液晶显示装置1000,如图5所示,其包括上述实施例其中之一的背光模组100、设置于所述背光模组100上的液晶显示面板200、设置于所述背光模组100和所述液晶显示面板200之间的下偏光片300及设置于所述液晶显示面板200上的上偏光片400。
具体的,如图6所示,所述液晶显示面板200包括第一基板21、与所述第一基板21相对设置的第二基板22以及设置在所述第一基板21和第二基板22之间的液晶分子23。其中,所述第二基板22上设置有彩色滤光片222,所述彩色滤光片222设置在玻璃基板221上,配向层223设置在彩色滤光片222上。所述所述彩色滤光片222包括红色滤光片、绿色滤光片、蓝色滤光片。
进一步的,背光模组给液晶显示面板提供的背光经过所述彩色滤光片后,会发出不同颜色的光,以实现显示的目的。其中,经过彩色滤光片发出的绿光和红光重叠的区域在黄橙光的波长区域内。
进一步的,所述光源上涂覆的光转换涂层中的光吸收因子,吸收波长范围在580纳米至610纳米的黄橙光,进而提纯了所述彩色滤光片发出的绿光和红光。
具体的,所述第一基板为阵列基板,所述第二基板为彩膜基板。当然的,彩膜基板上的彩色滤光片也可以设置在阵列基板上,做成COA(Color filter on Array,阵列上彩色滤光片)基板。
在本实施例中,液晶显示装置的背光模组中,因把掺杂有光吸收因子的光转换涂层涂覆在光源上,吸收了黄橙光,进一步提升了色域。同时,提纯了彩色滤光片发出的绿光和红光。
根据上述实施例可知:
本揭示提供一种背光模组及其制备方法以及液晶显示装置,背光模组包括背板、光源、光转换涂层。所述背板设置有容纳腔和固定构件。所述光源设置在所述容纳腔内,且由所述固定构件固定。所述光转换涂层,涂覆在所述光源上。在光源上涂覆的光转换涂层包括荧光粉和光吸收因子,荧光粉用于提升色域,光吸收因子可以吸收特定频段的黄橙光,进一步提升了色域。同时液晶显示装置的彩色滤光片中红光和绿光的重叠区也在黄橙光的波长区域内,光吸收因子可以吸收此重叠区的光,提纯了红光和绿光。
综上所述,虽然本揭示已以优选实施例揭露如上,但上述优选实施例并非用以限制本揭示,本领域的普通技术人员,在不脱离本揭示的精神和范围内,均可作各种更动与润饰,因此本揭示的保护范围以权利要求界定的范围为准。

Claims (10)

1.一种背光模组,其特征在于,包括:
背板,设置有容纳腔和固定构件;
光源,设置在所述容纳腔内,且由所述固定构件固定;以及
光转换涂层,涂覆在所述光源上;
其中,所述光转换涂层包括荧光粉和光吸收因子,所述光吸收因子用于吸收特定频段的光。
2.根据权利要求1所述的背光模组,其特征在于,所述荧光粉包括绿色荧光粉和KSF荧光粉。
3.根据权利要求2所述的背光模组,其特征在于,所述光吸收因子包括罗丹明类染料、亚酞菁类染料或四氮杂卟啉类染料中的至少一种有机染料。
4.根据权利要求3所述的背光模组,其特征在于,所述特定频段的光的波长范围为580纳米至610纳米。
5.根据权利要求1所述的背光模组,其特征在于,所述背光模组的背光方式为侧入式背光,所述背光模组还包括设置于所述容纳腔内的反射片和导光板,其中所述反射片设置于所述容纳腔底部,所述导光板设置于所述反射片上,且所述光源位于所述导光板的一侧。
6.根据权利要求1所述的背光模组,其特征在于,所述背光模组的背光方式为直下式背光,所述背光模组还包括设置于所述容纳腔内的下扩散片及上扩散片,所述下扩散片设置于所述光源上方,所述上扩散片设置于所述下扩散片上方。
7.一种背光模组制备方法,其特征在于,包括以下步骤:
步骤S10、提供一背板,在所述背板上形成容纳腔和固定构件;
步骤S20、提供一光源,在所述光源上涂覆光转换涂层;以及
步骤S30、通过所述固定构件把涂覆有所述光转换涂层的所述光源固定在所述容纳腔内。
8.根据权利要求7所述的背光模组制备方法,其特征在于,所述光转换涂层包括荧光粉和光吸收因子,其中所述荧光粉包括绿色荧光粉和KSF荧光粉,所述光吸收因子包括罗丹明类染料、亚酞菁类染料或四氮杂卟啉类染料中的至少一种有机染料。
9.根据权利要求8所述的背光模组制备方法,其特征在于,所述绿色荧光粉、所述KSF荧光粉及所述光吸收因子的掺杂比例分别为x、y、1-x-y,其中x为50%至70%,y为20%至45%,且x+y小于1。
10.一种液晶显示装置,其特征在于,包括如权利要求1至6任一项所述的背光模组、设置于所述背光模组上的液晶显示面板、设置于所述背光模组和所述液晶显示面板之间的下偏光片及设置于所述液晶显示面板上的上偏光片。
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