CN117348295A - 一种Mini-LED消除蓝化边的量子点背光源及显示装置 - Google Patents

一种Mini-LED消除蓝化边的量子点背光源及显示装置 Download PDF

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CN117348295A
CN117348295A CN202311365022.3A CN202311365022A CN117348295A CN 117348295 A CN117348295 A CN 117348295A CN 202311365022 A CN202311365022 A CN 202311365022A CN 117348295 A CN117348295 A CN 117348295A
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饶巍巍
徐贤强
姜发明
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Shenzhen Australis Electronic Technology Co Ltd
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Abstract

本发明公开了一种Mini‑LED消除蓝化边的量子点背光源及显示装置，该背光源包括胶铁一体，胶铁一体包括一背板，背板边沿弯折形成折边，折边的内侧及上边沿一体成型有胶框，胶框采用黄色PC塑胶，背板折边和胶框形成安装容纳槽。安装容纳槽自上而下层叠设有增光光学膜、量子点光学膜、半透半反膜、导光板、反光膜，导光板的下侧边设有条形线路板及若干蓝光LED，蓝光LED灯光由导光板的该侧射入。增光光学膜上边沿设有遮光胶框，遮光胶框上层为黑色遮光层，底层为黄色胶层，黄色胶层与胶框上边沿粘接固定。蓝光LED的灯光通过导光板边缘的蓝光照射到胶框侧壁、遮光胶框的黄色胶层，蓝光照射黄色PC塑胶、黄色胶层在光线中合间隙中合成白光，从而解决蓝化边的问题。

Description

一种Mini-LED消除蓝化边的量子点背光源及显示装置
技术领域
本发明涉及背光源技术领域，特别是涉及一种Mini-LED消除蓝化边的量子点背光源及显示装置。
背景技术
量子点是一种半导体纳米材料，其直径通常在1～10纳米之间，具有良好的光学和电学性质。应用量子点技术的量子点显示装置因其画质逼真的液晶显示效果越来越受到消费者的青睐。其原理是利用半导体纳米材料的量子效应，来实现材料的光学和电学性质的控制。量子点的大小通常与其能带宽度相当，因此量子点的能量状态是量子化的，只能发射具有特定波长的光子。这种量子限制效应使得量子点可以在不同的颜色之间切换，从而实现更加精确的色彩控制。具有发射光谱窄，发射光谱容易控制，量子产率高，吸收光谱宽并提供了广阔的色域(可达120％NTSCS色域以上)等优点，已成为下一代液晶背光模组的主流材料。
当前市面上大部分量子点电视都使用量子点光学膜。量子点光学膜是三明治结构，上下两层为水氧阻隔膜，中间为量子点光学膜。量子点光学膜放置在导光板上面，从而远离LED封装，让量子点所处的环境温度下降。量子点光学膜里面包含红色和绿色量子点，其原理为背光模组中的蓝光LED发出蓝光，蓝光经过量子点光学膜时，一部分蓝光被红色量子点转换成红光，一部分蓝光被绿色量子点转换成绿光，未被转换的蓝光和量子点发出的绿光、红光一起组成白光，成为液晶显示屏的背光源。然而，采用蓝光LED光激发量子点光学膜时，由于量子点光学膜中边缘区域的量子点数量相对于其他区域的量子点数量偏少，则边缘区域的红、绿、蓝光线无法较好的混合，进而在量子点光学膜的边缘处产生蓝光化边沿(蓝化边)。而蓝光是一种已被研究证明对人眼睛有害的一种可见光，因此，如何防止现有的量子点背光源的“蓝化边”而影响显示屏显示效果和用户视觉伤害的问题，成了量子点背光源亟需解决的问题。
发明内容
有鉴于此，本发明提出了一种Mini-LED消除蓝化边的量子点背光源及显示装置，解决量子点背光源产生“蓝化边”的问题。
为实现上述目的，本发明提供的技术方案如下：
一种Mini-LED消除蓝化边的量子点背光源，包括胶铁一体，所述胶铁一体包括一背板，所述背板边沿形成向上弯折的折边，所述折边的内侧及上边沿一体成型有胶框，所述胶框由黄色PC塑胶固化成型，所述背板的折边和胶框内形成安装容纳槽。
自上而下层叠设置于所述安装容纳槽的增光光学膜、量子点光学膜、半透半反膜、导光板、反光膜，所述导光板的下侧边设有条形线路板，条形线路板上均匀贴片有若干蓝光LED，若干蓝光LED的灯光由导光板的该侧射入。
增光光学膜上边沿设有遮光胶框，所述遮光胶框上层为黑色遮光层，底层为黄色胶层，所述黄色胶层与所述胶框上边沿粘接固定。
其中，导光板、半透半反膜、量子点光学膜、增光光学膜的左侧边、右侧边、上侧边均与所述胶框侧壁存有光线中合间隙，所述蓝光LED的灯光通过所述导光板边缘未经量子点光学膜转化的蓝光照射到所述胶框侧壁、遮光胶框的黄色胶层，蓝光照射黄色PC塑胶、黄色胶层在所述光线中合间隙中合成白光。
优选地，条形线路板采用FPC柔性线路板，FPC柔性线路板的底面前侧设有双面胶，通过双面胶粘贴于所述导光板的下侧边侧面。
优选地，半透半反膜和量子点光学膜的下侧边沿所述FPC柔性线路板粘贴的边层叠于所述导光板的上面，所述量子点光学膜的下侧边上横设一扩散黑条，扩散黑条用于挡光。
优选地，增光光学膜包括下增光光学膜、上增光光学膜，所述下增光光学膜和上增光光学膜沿所述扩散黑条的上侧边层叠于所述量子点光学膜上。
优选地，导光板与所述胶框侧壁形成的光线中合间隙宽度为0.2-0.5mm,增光光学膜、量子点光学膜、半透半反膜所述胶框侧壁形成的光线中合间隙宽度为0.08-0.3mm。
优选地，黄色PC塑胶采用PC-2000或PC-5000A塑料添加黄色着色剂制成。
一种显示装置，包括了上述的Mini-LED消除蓝化边的量子点背光源。
与现有技术相比，具有如下积极效果：本发明通过对组装成量子点背光源的结构组件进行改进，以解决量子点背光源蓝化边问题。通过胶铁一体的胶框采用黄色PC(聚碳酸酯)塑胶，组成背光组件的导光板、半透半反膜、量子点光学膜、增光光学膜的左右两侧、上侧与胶框内侧壁存有实现光线中合间隙，从而实现由蓝光LED在上述背光组件的边缘未能实现与量子点光学膜转化颜色的蓝光从边缘射出，蓝色光线与黄色PC胶框侧壁的颜色中合成白色光线，此时，射到黄色PC胶框侧壁的光线未完全中合成白色。通过光照射在遮光胶框的底层的黄色胶层，对未完全中合的蓝光再进一次中合达到要求的白光颜色，从而解决了量子点背光源的蓝化边的问题。
附图说明
图1为本发明的量子点背光源实施例结构分解示意图。
图2为本发明的量子点背光源实施例结构示意图。
图3为本发明的量子点背光源A-A截面图。
附图标记说明：
1-胶铁一体；101-背板；102-胶框；2-反光膜；3-导光板；4-半透半反膜；5-量子点光学膜；6-下增光光学膜；7-上增光光学膜；8-遮光胶框；9-条形线路板；10-蓝光LED；11-扩散黑条。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。
在实施例中所述的具体方位的上侧边、下侧边、左侧边、右侧边，是根据图1中的结构示意图中的方位进行对方案的描述，而并不是对所有的背光源结构方位的唯一限定。
实施例一
请参阅附图1至图3，一种Mini-LED消除蓝化边的量子点背光源，包括：
胶铁一体1，所述胶铁一体1包括一背板101，所述背板101边沿形成向上弯折的折边，所述折边的内侧及上边沿一体成型有胶框102，所述胶框102由黄色PC塑胶固化成型，所述背板101的折边和胶框102内形成安装容纳槽。
自上而下层叠设置于所述安装容纳槽的增光光学膜、量子点光学膜5、半透半反膜4、导光板3、反光膜2，所述导光板3的下侧边设有条形线路板9，条形线路板9上均匀贴片有若干蓝光LED10，若干蓝光LED10的灯光由导光板3的该侧射入。设置半透半反膜4将蓝色光线透过去，反射量子点转换后的红绿光线，从而提高亮度。
设于所述增光光学膜上边沿的遮光胶框8，所述遮光胶框8上层为黑色遮光层，底层为黄色胶层，所述黄色胶层与所述胶框102上边沿粘接固定。
其中，导光板3、半透半反膜4、量子点光学膜5、增光光学膜的左侧边、右侧边、上侧边均与所述胶框102侧壁存有光线中合间隙，所述蓝光LED10的灯光通过所述导光板3边缘未经量子点光学膜5转化的蓝光照射到所述胶框102侧壁、遮光胶框8的黄色胶层，蓝光照射黄色PC塑胶、黄色胶层在所述光线中合间隙中合成白光。
由蓝光LED10在上述背光组件的边缘未能实现与量子点光学膜转化颜色的蓝光从边缘射出(由于量子点光学膜中边缘区域的量子点数量相对于其他区域的量子点数量偏少，则边缘区域的红、绿、蓝光线无法较好的混合，进而在量子点光学膜的边缘处产生蓝光射出)，蓝色光线与黄色PC的胶框102侧壁的颜色中合成白色光线，此时，射到黄色PC胶框102侧壁的光线未完全中合成白色。再通过光照射在遮光胶框的底层的黄色胶层，对未完全中合的蓝光再进一次中合达到要求的白光颜色，从而解决了量子点背光源的蓝化边的问题，提高视觉体验，避免蓝光对眼睛的伤害。
优选地，所述条形线路板9采用FPC柔性线路板，FPC柔性线路板的底面前侧设有双面胶，通过双面胶粘贴于所述导光板2的下侧边侧面。FPC柔性线路板以聚酰亚胺或聚酯薄膜为基材制成的一种具有高度可靠性，绝佳的可挠性印刷电路板。具有配线密度高、重量轻、厚度薄、弯折性好的优点，能够满足背光源整体薄的性能要求。
进一步地，所述双面胶采用透光率低或者不透光的非透明双面胶，优选但不限于为黑白胶或黑黑胶等。
参照图3，优选地，所述半透半反膜4和量子点光学膜5的下侧边沿所述FPC柔性线路板粘贴的边层叠于所述导光板3的上面，所述量子点光学膜5的下侧边上横设一扩散黑条11，扩散黑条11用于挡光。对于导光板3设置FPC柔性线路板的侧边，该侧边端面为蓝光LED10的光源输入边，该侧边不同于其他另外的三侧边，其要实现对该侧边边缘处的蓝光的遮挡，通过设置上述扩散黑条11，扩散黑条11由扩散膜层和黑胶层组成，可以吸收光线和遮挡光线，避免了蓝光LED10前方有灯影。
优选地，所述增光光学膜包括下增光光学膜6、上增光光学膜7，所述下增光光学膜6和上增光光学膜7沿所述扩散黑条11的上侧边层叠于所述量子点光学膜5上。
应当理解的是，所述增光光学膜的类型和数量可根据实际需求而选定，不应以此为限，其他能够替代相同功能的增光光学膜结构也可作为本方案实施方式之一。
参照图3，优选地，所述导光板3与所述胶框102侧壁形成的光线中合间隙宽度为0.2-0.5mm,如图3中的“a”处的宽度数值。所述增光光学膜、量子点光学膜5、半透半反膜4与所述胶框102侧壁形成的光线中合间隙宽度为0.08-0.3mm，如图3中“b”处的宽度数值。
优选地，所述黄色PC塑胶采用PC-2000或PC-5000A塑料添加黄色着色剂制成，制成的胶框102仍具有透光性，蓝光LED10的蓝色光照射在胶框102，一部分被胶框102吸收、一部分被反射，一部分被穿透，又穿透后折射出来，从而形成对蓝光中合成白光光线，上述的光线中合间隙的宽度设计，实现较优的光线中合效果。
实施例二
一种显示装置，包括上述的Mini-LED消除蓝化边的量子点背光源。所述显示装置可以是电视、显示器、手机等终端设备的显示屏装置，通过本发明方案设计的量子点背光源实测显示屏的色域值可以提高到NTSC 115％左右，是传统背光显示屏色域值的1.3-1.7倍。
以上显示和描述了本发明的基本原理、主要特征及本发明的优点。本行业的技术人员应该了解，本发明不受上述实施例的限制，但凡采用等同替换或等效变换的形式所获得的技术方案，均应落于本发明的保护范围之内。

Claims (7)

1.一种Mini-LED消除蓝化边的量子点背光源，其特征在于，包括：
胶铁一体，所述胶铁一体包括一背板，所述背板边沿形成向上弯折的折边，所述折边的内侧及上边沿一体成型有胶框，所述胶框由黄色PC塑胶固化成型，所述背板的折边和胶框内形成安装容纳槽；
自上而下层叠设置于所述安装容纳槽的增光光学膜、量子点光学膜、半透半反膜、导光板、反光膜，所述导光板的下侧边设有条形线路板，条形线路板上均匀贴片有若干蓝光LED，若干蓝光LED的灯光由导光板的该侧射入；
设于所述增光光学膜上边沿的遮光胶框，所述遮光胶框上层为黑色遮光层，底层为黄色胶层，所述黄色胶层与所述胶框上边沿粘接固定；
所述导光板、半透半反膜、量子点光学膜、增光光学膜的左侧边、右侧边、上侧边均与所述胶框侧壁存有光线中合间隙，所述蓝光LED的灯光通过所述导光板边缘未经量子点光学膜转化的蓝光照射到所述胶框侧壁、遮光胶框的黄色胶层，蓝光照射黄色PC塑胶、黄色胶层在所述光线中合间隙中合成白光。
2.根据权利要求1所述的Mini-LED消除蓝化边的量子点背光源，其特征在于：所述条形线路板采用FPC柔性线路板，FPC柔性线路板的底面前侧设有双面胶，通过双面胶粘贴于所述导光板的下侧边侧面。
3.根据权利要求2所述的Mini-LED消除蓝化边的量子点背光源，其特征在于：所述半透半反膜和量子点光学膜的下侧边沿所述FPC柔性线路板粘贴的边层叠于所述导光板的上面，所述量子点光学膜的下侧边上横设一扩散黑条，扩散黑条用于挡光。
4.根据权利要求3所述的Mini-LED消除蓝化边的量子点背光源，其特征在于：所述增光光学膜包括下增光光学膜、上增光光学膜，所述下增光光学膜和上增光光学膜沿所述扩散黑条的上侧边层叠于所述量子点光学膜上。
5.根据权利要求1所述的Mini-LED消除蓝化边的量子点背光源，其特征在于：所述导光板与所述胶框侧壁形成的光线中合间隙宽度为0.2-0.5mm,所述增光光学膜、量子点光学膜、半透半反膜所述胶框侧壁形成的光线中合间隙宽度为0.08-0.3mm。
6.根据权利要求1所述的Mini-LED消除蓝化边的量子点背光源，其特征在于：所述黄色PC塑胶采用PC-2000或PC-5000A塑料添加黄色着色剂制成。
7.一种显示装置，其特征在于，包括权利要求1-6任意一项所述的Mini-LED消除蓝化边的量子点背光源。
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