CN102748714A - 荧光粉基板的制作方法及用该荧光粉基板的液晶模组 - Google Patents

荧光粉基板的制作方法及用该荧光粉基板的液晶模组 Download PDF

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CN102748714A
CN102748714A CN201210218794XA CN201210218794A CN102748714A CN 102748714 A CN102748714 A CN 102748714A CN 201210218794X A CN201210218794X A CN 201210218794XA CN 201210218794 A CN201210218794 A CN 201210218794A CN 102748714 A CN102748714 A CN 102748714A
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glass plate
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liquid crystal
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CN102748714B (zh
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王烨文
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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 PCT/CN2012/078551 priority patent/WO2014000326A1/zh
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    • G—PHYSICS
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    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
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    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
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    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
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    • H05B33/10—Apparatus or processes specially adapted to the manufacture of electroluminescent light sources
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
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    • B32B17/10807—Making laminated safety glass or glazing; Apparatus therefor
    • B32B17/10899—Making laminated safety glass or glazing; Apparatus therefor by introducing interlayers of synthetic resin
    • B32B17/10944—Making laminated safety glass or glazing; Apparatus therefor by introducing interlayers of synthetic resin in powder form
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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
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
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    • G02F1/133614—Illuminating devices using photoluminescence, e.g. phosphors illuminated by UV or blue light

Abstract

本发明提供一种荧光粉基板的制作方法及用该荧光粉基板的液晶模组，所述制作方法包括以下步骤：步骤1、提供荧光粉及第一、第二玻璃板，该第二玻璃板上设有通孔；步骤2、将荧光粉于去离子水溶剂中调制成浆料；步骤3、用浆料在第一玻璃板的表面上形成荧光粉层；步骤4、在第一玻璃板形成有荧光粉层的表面的边缘位置平铺一圈低熔点玻璃粉；步骤5、将第二玻璃板贴合于第一玻璃板上；步骤6、将贴合后的第一与第二玻璃板在空气中于400-550℃灼烧至第一与第二玻璃板之间的有机物燃烧完，这时，低熔点玻璃粉将第一与第二玻璃板粘合在一起；步骤7、通过第二玻璃板上的通孔将该第一与第二玻璃板之间抽至真空；步骤8、将该通孔密封，制成荧光粉基板。

Description

荧光粉基板的制作方法及用该荧光粉基板的液晶模组
技术领域
本发明涉及液晶显示领域，尤其涉及一种荧光粉基板的制作方法及用该荧光粉基板的液晶模组。
背景技术
液晶显示装置(LCD，Liquid Crystal Display)具有机身薄、省电、辐射低等众多优点，得到了广泛的应用。现有市场上的液晶显示装置大部分为背光型液晶显示装置，其包括液晶面板及背光模组(backlight module)。液晶面板的工作原理是在两片平行的玻璃基板当中放置液晶分子，两片玻璃基板中间有许多垂直和水平的细小电线，通过通电与否来控制液晶分子改变方向，将背光模组的光线折射出来产生画面。由于液晶面板本身不发光，需要借由背光模组提供的光源来正常显示影像，因此，背光模组成为液晶显示装置的关键组件之一。背光模组依照光源入射位置的不同分成侧入式背光模组与直下式背光模组两种。直下式背光模组是将发光光源例如CCFL(Cold CathodeFluorescent Lamp，阴极荧光灯管)或LED(Light Emitting Diode，发光二极管)设置在液晶面板后方，直接形成面光源提供给液晶面板。而侧入式背光模组是将背光源LED灯条(Light bar)设于液晶面板侧后方的背板边缘，LED灯条发出的光线从导光板(LGP，Light Guide Plate)一侧的入光面进入导光板，经反射和扩散后从导光板出光面射出，再经由光学膜片组以形成面光源提供给液晶面板。
LED灯条包括PCB板及安装并电性连接于该PCB板上的LED灯，LED灯一般为蓝光LED芯片涂布YAG荧光粉(B+Y粉)或者蓝光LED涂布RG(red andgreen)粉(B+RG粉)，以发出白光。荧光粉一般与环氧树脂及硅胶混，再用点胶机封装在LED芯片上。该种结构中，LED芯片与环氧树脂及硅胶贴紧密粘贴，导致LED芯片散热较慢，这就使得LED芯片长期处于高温状态，然而，环氧树脂的耐热性较差，长期处于高温状态时会变黄，发光效果降低，同时，荧光粉长期处于高温状态下也容易发生色衰，进而导致LED灯的使用寿命短，成本较高。
发明内容
本发明的目的在于提供一种荧光粉基板的制作方法，制程简单，且，制得荧光粉基板在组装于液晶模组时，与发光芯片分离设置，降低了发光芯片所发出的热量对荧光粉的影响，延长了使用寿命长。
本发明的另一目的在于提供一种液晶模组，其通过荧光粉基板的使用，光照均匀，使用寿命长，且成本较低。
为实现上述目的，本发明提供一种荧光粉基板的制作方法，其包括以下步骤：
步骤1、提供荧光粉及第一、第二玻璃板，该第二玻璃板上设有通孔；
步骤2、将荧光粉于去离子水溶剂中调制成浆料；步骤3、用浆料在第一玻璃板的表面上形成荧光粉层；
步骤4、在第一玻璃板形成有荧光粉层的表面的边缘位置平铺一圈低熔点玻璃粉；
步骤5、将第二玻璃板贴合于第一玻璃板上；
步骤6、将贴合后的第一与第二玻璃板在空气中于400-550℃灼烧至第一与第二玻璃板之间的有机物燃烧完，这时，低熔点玻璃粉将第一与第二玻璃板粘合在一起；
步骤7、通过第二玻璃板上的通孔将该第一与第二玻璃板之间抽至真空；
步骤8、将该通孔密封，制成荧光粉基板。
所述荧光粉由氧化物、硅酸盐、铝酸盐、氮化物及氮氧化物混合制成。
所述浆料中还包含有磷酸三乙脂、硼酸锌锶钙、焦锶磷酸钙及磷酸二氢铵。
所述去离子水溶剂中包含有水溶性聚合物粘结剂。
所述水溶性聚合物粘结剂为聚乙烯醇或聚甲基丙烯酸铵。
所述通孔的孔径为0.2-1cm。
所述荧光粉层的形成方式为印刷或喷涂。
所述第一与第二玻璃板均为白玻璃。
本发明还提供一种液晶模组，包括：荧光粉基板、分别设于该荧光粉基板两侧的液晶显示面板及背光源，所述荧光粉基板包括第一、第二玻璃板及设于第一与第二玻璃板之间的荧光粉层，所述背光源发出的光线经由荧光粉基板转化后，为液晶显示面板提供面光源。
所述液晶显示面板包括阵列基板、与该阵列基板贴合设置的彩膜滤光片基板、设于该阵列基板与彩膜滤光片基板之间的液晶及设于该阵列基板与彩膜滤光片基板之间且设于彩膜滤光片基板边缘的密封胶框，该密封胶框将液晶密封于阵列基板与彩膜滤光片基板之间，进而形成一液晶盒，所述面光源的大小等于该液晶盒的大小。
本发明的有益效果：本发明荧光粉基板的制作方法及用该荧光粉基板的液晶模组，通过简单的生产制程将荧光粉密封于两玻璃板之间，进而使得在组装液晶模组时，荧光粉与发光芯片分离设置，降低发光芯片发出的热量对荧光粉的影响，延长了荧光粉的使用寿命，进而降低了液晶模组的生产成本，同时，该荧光粉基板发光均匀，进而可以代替或减少导光板的使用，进一步降低了成本。
为了能更进一步了解本发明的特征以及技术内容，请参阅以下有关本发明的详细说明与附图，然而附图仅提供参考与说明用，并非用来对本发明加以限制。
附图说明
下面结合附图，通过对本发明的具体实施方式详细描述，将使本发明的技术方案及其它有益效果显而易见。
附图中，
图1为本发明荧光粉基板的制作方法的流程图；
图2为本发明液晶模组的结构示意图。
具体实施方式
为更进一步阐述本发明所采取的技术手段及其效果，以下结合本发明的优选实施例及其附图进行详细描述。
请参阅图1，本发明提供一种荧光粉基板的制作方法，其包括以下步骤：
步骤1、提供荧光粉及第一、第二玻璃板，该第二玻璃板上设有通孔。
所述荧光粉由氧化物、硅酸盐、铝酸盐、氮化物及氮氧化物混合制成，其具体成分可将根据发光芯片所发出的光的颜色及该颜色的光通过荧光粉后得到的光的颜色来具体确定。所述第一与第二玻璃均为白玻璃，且该第二玻璃板上还设有一通孔，该通孔的孔径为0.2-1cm。
步骤2、将荧光粉于去离子水溶剂中调制成浆料。
所述去离子水溶剂中包含有水溶性聚合物粘结剂，在本实施例中，所述水溶性聚合物粘结剂为聚乙烯醇或聚甲基丙烯酸铵，其没有强烈气味，不污染环境、不影响工人健康，且成本低，有利于成本控制。
所述浆料中还包含有磷酸三乙脂、硼酸锌锶钙、焦锶磷酸钙及磷酸二氢铵，以增强粘结力，提升荧光粉的品质。
步骤3、用浆料在第一玻璃板的表面上形成荧光粉层。
所述荧光粉层的形成方式为印刷或涂布。
步骤4、在第一玻璃板形成有荧光粉层的表面的边缘位置平铺一圈低熔点玻璃粉。
步骤5、将第二玻璃板贴合于第一玻璃板上。
该第二玻璃板的表面抵靠于玻璃粉上，进而将荧光粉封存于第一与第二玻璃板之间。
步骤6、将贴合后的第一与第二玻璃板在空气中于400-550℃灼烧至第一与第二玻璃板之间的有机物燃烧完，这时，低熔点玻璃粉将第一与第二玻璃板粘合在一起。
步骤7、通过第二玻璃板上的通孔将该第一与第二玻璃板之间抽至真空。
该真空可减少荧光粉的衰减，进一步延长荧光粉的使用寿命。
步骤8、将该通孔密封，制成荧光粉基板。
本发明制得的荧光粉基板，可与蓝光芯片到红光芯片或者紫外芯片搭配，得到不同色温、不同频谱，还可以与彩膜滤光片(color filter)组合后可以得到各种色域，且光照均匀。
值得一提的是，本荧光粉基板还可以做成不同大小或一整块，部分或完全代替导光板或扩散板，进而减少导光板或扩散板的使用，进一步降低生产成本。
请参阅图2，本发明还提供一种液晶模组，包括：荧光粉基板20、分别设于该荧光粉基板20两侧的液晶显示面板40及背光源60。
所述荧光粉基板20包括第一、第二玻璃板22、24及设于第一与第二玻璃板22、24之间的荧光粉层26，所述背光源60发出的光线经由荧光粉基板20转化后，为液晶显示面板40提供关照均匀的面光源。
所述液晶显示面板40包括阵列基板42、与该阵列基板42贴合设置的彩膜滤光片基板44、设于该阵列基板42与彩膜滤光片基板44之间的液晶46及设于该阵列基板42与彩膜滤光片基板44之间且设于彩膜滤光片基板44边缘的密封胶框48，该密封胶框48将液晶46密封于阵列基板42与彩膜滤光片基板44之间，进而形成一液晶盒，所述面光源的大小等于该液晶盒的大小。
本发明液晶模组，还包括背板(未图示)、胶框(未图示)等组件，均可用现有技术中的组件，在此不做赘述。
综上所述，本发明荧光粉基板的制作方法，通过简单的生产制程将荧光粉密封于两玻璃板之间，进而使得在组装液晶模组时，荧光粉与发光芯片分离设置，降低发光芯片发出的热量对荧光粉的影响，延长了荧光粉的使用寿命，进而降低了液晶模组的生产成本，同时，该荧光粉基板发光均匀，进而可以代替或减少导光板或扩散板的使用，进一步降低了成本。
以上所述，对于本领域的普通技术人员来说，可以根据本发明的技术方案和技术构思作出其他各种相应的改变和变形，而所有这些改变和变形都应属于本发明权利要求的保护范围。

Claims (10)

1.一种荧光粉基板的制作方法，其特征在于，包括以下步骤：
步骤1、提供荧光粉及第一、第二玻璃板，该第二玻璃板上设有通孔；
步骤2、将荧光粉于去离子水溶剂中调制成浆料；
步骤3、用浆料在第一玻璃板的表面上形成荧光粉层；
步骤4、在第一玻璃板形成有荧光粉层的表面的边缘位置平铺一圈低熔点玻璃粉；
步骤5、将第二玻璃板贴合于第一玻璃板上；
步骤6、将贴合后的第一与第二玻璃板在空气中于400-550℃灼烧至第一与第二玻璃板之间的有机物燃烧完，这时，低熔点玻璃粉将第一与第二玻璃板粘合在一起；
步骤7、通过第二玻璃板上的通孔将该第一与第二玻璃板之间抽至真空；
步骤8、将该通孔密封，制成荧光粉基板。
2.如权利要求1所述的荧光粉基板的制作方法，其特征在于，所述荧光粉由氧化物、硅酸盐、铝酸盐、氮化物及氮氧化物混合制成。
3.如权利要求1所述的荧光粉基板的制作方法，其特征在于，所述浆料中还包含有磷酸三乙脂、硼酸锌锶钙、焦锶磷酸钙及磷酸二氢铵。
4.如权利要求1所述的荧光粉基板的制作方法，其特征在于，所述去离子水溶剂中包含有水溶性聚合物粘结剂。
5.如权利要求4所述的荧光粉基板的制作方法，其特征在于，所述水溶性聚合物粘结剂为聚乙烯醇或聚甲基丙烯酸铵。
6.如权利要求1所述的荧光粉基板的制作方法，其特征在于，所述通孔的孔径为0.2-1cm。
7.如权利要求1所述的荧光粉基板的制作方法，其特征在于，所述荧光粉层的形成方式为印刷或喷涂。
8.如权利要求1所述的荧光粉基板的制作方法，其特征在于，所述第一与第二玻璃板均为白玻璃。
9.一种液晶模组，其特征在于，包括：荧光粉基板、分别设于该荧光粉基板两侧的液晶显示面板及背光源，所述荧光粉基板包括第一、第二玻璃板及设于第一与第二玻璃板之间的荧光粉层，所述背光源发出的光线经由荧光粉基板转化后，为液晶显示面板提供面光源。
10.如权利要求9所述的液晶模组，其特征在于，所述液晶显示面板包括阵列基板、与该阵列基板贴合设置的彩膜滤光片基板、设于该阵列基板与彩膜滤光片基板之间的液晶及设于该阵列基板与彩膜滤光片基板之间且设于彩膜滤光片基板边缘的密封胶框，该密封胶框将液晶密封于阵列基板与彩膜滤光片基板之间，进而形成一液晶盒，所述面光源的大小等于该液晶盒的大小。
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