CN115598886A - 一种增强红外光透过率和降低异物遮蔽性的背光源 - Google Patents

一种增强红外光透过率和降低异物遮蔽性的背光源 Download PDF

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CN115598886A
CN115598886A CN202211343891.1A CN202211343891A CN115598886A CN 115598886 A CN115598886 A CN 115598886A CN 202211343891 A CN202211343891 A CN 202211343891A CN 115598886 A CN115598886 A CN 115598886A
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于天宝
宋荣华
李林生
卢文勇
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Jiangxi Lianchuang Zhiguang Technology Co ltd
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Abstract

一种增强红外光透过率和降低异物遮蔽性的背光源，本发明涉及背光源技术领域，所述背光源由上至下依次包括有红外增光膜和红外扩散膜，所述红外增光膜和所述红外扩散膜通过光学胶相贴合成多层复合膜，本发明通过设有红外增光膜和红外扩散膜，将下扩散膜改用红外扩散膜，降低雾度、提升红外光透过率，下增光和上增光改用红外增光膜、取消棱镜改为带有粒子状光面，增加红外光透过率从而实现屏下指纹，通过将所述红外增光膜和所述红外扩散膜通过光学胶相贴合成多层复合膜，使得异物不容易进入，从而使得背光源透光效果好。

Description

一种增强红外光透过率和降低异物遮蔽性的背光源
技术领域
本发明涉及背光源技术领域，具体为一种增强红外光透过率和降低异物遮蔽性的背光源。
背景技术
液晶显示器(LCD)是目前常见的显示技术，但是，LCD为非发光性的显示设备，需要借助背光源模组(BLU)提供亮度、均匀的光源才能起到显示效果，传统的背光源主要由下扩散、下增光、上增光三张膜片组装而成；其中扩散膜(DIF)是起到扩散光线和雾化作用，提升液晶显示器画面的均匀性；增光模(BEF)的出光面具有棱镜层结构，其光功能主要是将入射的光线进行收敛，起到增亮作用，提供液晶显示器画面的正视亮度；而传统的下扩散、下增光、上增光是会阻挡红外光的透过，从而无法实现屏下指纹，而要实现屏下指纹必须改变下扩散结构，降低下扩散雾度；改变下增光和上增光带有棱镜的结构，用于提供红外光的透过率，当雾度、棱镜结构改变后，背光源的整体透过率也会提升，而整体的遮蔽性便会降低，膜材和背光源的异物、颗粒便会以白点或黑点的形式表示在液晶显示器上，而良率便会降低。
发明内容
本发明的目的在于提供一种增强红外光透过率和降低异物遮蔽性的背光源，以解决现有背光源会阻挡红外线透过和无法实现屏下指纹的问题，本发明提供一种增强红外光透过率和降低异物遮蔽性的背光源，增设红外扩散膜和红外增光膜，并通过光学胶将红外扩散膜和红外增光膜合成多层复合膜，将其直接附着在导光板一侧的表面。与传统背光模组相比，本发明提供的具有透红外线反射可见光功能的背光源通过多张膜片复合，使膜片与膜片内无异物颗粒，提升自动化率，减少膜片之间间隙，提升红外光透过率。
为实现上述目的，本发明提供如下技术方案：一种增强红外光透过率和降低异物遮蔽性的背光源，所述背光源由上至下依次包括有红外增光膜和红外扩散膜，所述红外增光膜和所述红外扩散膜通过光学胶相贴合成多层复合膜。
作为本发明进一步方案：所述光学胶为OCA胶。
作为本发明进一步方案：所述红外增光膜包括PET基材、上表面涂布光滑面、下表面粒子结构面。
作为本发明进一步方案：所述红外扩散膜包括PET基材、上表面特殊涂布面和下表面网点结构面。
作为本发明进一步方案：所述背光源还包括有胶铁框、反射片、导光板和遮光胶层，所述红外增光膜和所述红外扩散膜设置在所述导光板和遮光胶层之间。
作为本发明进一步方案：所述导光板的一侧设有LED灯条。
作为本发明进一步方案：所述红外增光膜和红外扩散膜的厚度均在0.065mm～0.3mm之间。
综上所述本发明具有以下有益效果：本发明通过设有红外增光膜和红外扩散膜，将下扩散膜改用红外扩散膜，降低雾度、提升红外光透过率，下增光和上增光改用红外增光膜、取消棱镜改为带有粒子状光面，增加红外光透过率从而实现屏下指纹，通过将所述红外增光膜和所述红外扩散膜通过光学胶相贴合成多层复合膜，使得异物不容易进入，从而使得背光源透光效果好。
附图说明
1、图1为本发明中的多层复合膜结构示意图；
2、图2为本发明中的背光源组装图。
图中：1.胶铁框；2.反射片；3.导光板；31.LED灯条；4.红外扩散膜；5.红外增光膜；6.遮光胶层；7.OCA胶。
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。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的其他实施例，都属于本发明保护的范围。
本发明提供如下技术方案：如图1所示，一种具有透红外线反射可见光功能的背光源，所述背光源由上至下依次包括有红外增光膜5和红外扩散膜4，所述红外增光膜5和所述红外扩散膜4通过光学胶相贴合成多层复合膜，所述红外增光膜5包括PET基材、上表面涂布光滑面、下表面粒子结构面，所述红外扩散膜4包括PET基材、上表面特殊涂布面和下表面网点结构面，本发明通过设有红外增光膜5和红外扩散膜4，将下扩散膜改用红外扩散膜4，降低雾度、提升红外光透过率，下增光和上增光改用红外增光膜5、取消棱镜改为带有粒子状光面，增加红外光透过率从而实现屏下指纹，当雾度、棱镜结构改变后，背光源的整体透过率也会提升，而整体的遮蔽性便会降低，膜材和背光源的异物、颗粒便会以白点或黑点的形式表示在液晶显示器上，而良率便会降低，进一步的，通过将所述红外增光膜5和所述红外扩散膜4通过光学胶相贴合成多层复合膜，使得异物不容易进入，从而使得背光源透光效果好，所述光学胶为OCA胶7，OCA光学胶是重要触摸屏的原材料之一，是将光学亚克力胶做成无基材，然后在上下底层，再各贴合一层离型薄膜，是一种无基体材料的双面贴合胶带。它是触控屏之最佳胶粘剂，其优点是清澈度、高透光性全光穿透率>99％、高黏着力、高耐候、耐水性、耐高温、抗紫外线，受控制的厚度，提供均匀的间距，长时间使用不会产生黄化黄变、剥离及变质的问题。
如图2所示，所述背光源还包括有胶铁框1、反射片2、导光板3和遮光胶层6，所述红外增光膜5和所述红外扩散膜4设置在所述导光板3和遮光胶层6之间，所述导光板3的一侧设有LED灯条31，所述红外增光膜5和红外扩散膜4的厚度均在0.065mm～0.3mm之间，通常在实际生产中，需要将不同的膜片足片组装，不仅生产耗时长、组装效率低、膜材内异物增多、膜片偏位，而且还存在组装良率低等缺点；随着背光源产业的发展，边框越来越窄，整体厚度越来越薄；行业对背光模组的组装良率要求越来越高，组装的成本则需越来越低；非复合膜的话，会有多张光学膜，那生产时就要贴多次，且每层膜之间就容易进环境异物而影响发光效果，因此，红外扩散膜4、红外增光膜5通过OCA胶7黏贴成，贴合在一起，从而形成多层复合膜，在组成背光源时，光学膜之间不会进环境异物，有效的提高了背光源的良品率。
以上公开的本发明优选实施例只是用于帮助阐述本发明。优选实施例并没有详尽叙述所有的细节，也不限制该发明仅为的具体实施方式。显然，根据本说明书的内容，可作很多的修改和变化。本说明书选取并具体描述这些实施例，是为了更好地解释本发明的原理和实际应用，从而使所属技术领域技术人员能很好地理解和利用本发明。本发明仅受权利要求书及其全部范围和等效物的限制。

Claims (7)

1.一种增强红外光透过率和降低异物遮蔽性的背光源，其特征在于：所述背光源由上至下依次包括有红外增光膜(5)和红外扩散膜(4)，所述红外增光膜(5)和所述红外扩散膜(4)通过光学胶相贴合成多层复合膜。
2.根据权利要求1所述的一种增强红外光透过率和降低异物遮蔽性的背光源，其特征在于：所述光学胶为OCA胶(7)。
3.根据权利要求1所述的一种增强红外光透过率和降低异物遮蔽性的背光源，其特征在于：所述红外增光膜(5)包括PET基材、上表面涂布光滑面、下表面粒子结构面。
4.根据权利要求1所述的一种增强红外光透过率和降低异物遮蔽性的背光源，其特征在于：所述红外扩散膜(4)包括PET基材、上表面特殊涂布面和下表面网点结构面。
5.根据权利要求1所述的一种增强红外光透过率和降低异物遮蔽性的背光源，其特征在于：所述背光源还包括有胶铁框(1)、反射片(2)、导光板(3)和遮光胶层(6)，所述红外增光膜(5)和所述红外扩散膜(4)设置在所述导光板(3)和遮光胶层(6)之间。
6.根据权利要求5所述的一种增强红外光透过率和降低异物遮蔽性的背光源，其特征在于：所述导光板(3)的一侧设有LED灯条(31)。
7.根据权利要求1所述的一种增强红外光透过率和降低异物遮蔽性的背光源，其特征在于：所述红外增光膜(5)和红外扩散膜(4)的厚度均在0.065mm～0.3mm之间。
CN202211343891.1A 2022-10-31 2022-10-31 一种增强红外光透过率和降低异物遮蔽性的背光源 Pending CN115598886A (zh)

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