CN102190972B - 多层结构的光学黏结层 - Google Patents

多层结构的光学黏结层 Download PDF

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CN102190972B
CN102190972B CN201010130377.0A CN201010130377A CN102190972B CN 102190972 B CN102190972 B CN 102190972B CN 201010130377 A CN201010130377 A CN 201010130377A CN 102190972 B CN102190972 B CN 102190972B
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CN102190972A (zh
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李裕文
许贤斌
袁琼
林奉铭
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TPK Touch Solutions Xiamen Inc
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Priority to CN201010130377.0A priority Critical patent/CN102190972B/zh
Priority to KR1020127026800A priority patent/KR101663857B1/ko
Priority to JP2012557376A priority patent/JP5750125B2/ja
Priority to EP10847732.4A priority patent/EP2547742B1/en
Priority to PCT/CN2010/076655 priority patent/WO2011113263A1/en
Priority to US13/634,918 priority patent/US10558071B2/en
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Abstract

本发明公开了一种多层结构的光学黏结层，包括一感压式双面黏结层，具有一第一表面与一第二表面；以及一热流动式感压双面黏结层，具有一第一表面与一第二表面，该热流动式感压双面黏结层的第一表面是与该感压式双面黏结层的第一表面彼此黏结于一体而成为一单体的双层结构，而该热流动式感压双面黏结层的第二表面贴合于一目标物体的非平整表面，以改善该目标物体的彩晕现象。

Description

多层结构的光学黏结层
技术领域
本发明涉及一种光学黏结层，特别是涉及一种多层结构的光学黏结层。
背景技术
LCD是目前相当成熟的显示技术，且随着LCD的成熟发展，产生了很多的应用产品，例如触控显示器，是将感测技术与LCD结合的先进产品，但不管是LCD本身或是整合的触控显示器，都需使用多层结构方式堆栈而成，一般在此堆栈过程中皆是使用单一黏结材料进行贴合。
液晶显示器在通过背光源点亮时，可能在显示面板上看到不均匀的色框或色块，这种色框或色块在白色显示面板上为黄色，在灰色显示面板上为白色，这种现象称之为彩晕(Mura)。而此种Mura现象是在类似液晶显示器的电子产品中常见的视觉缺陷，其通常造成低对比度、非均匀亮度区域、边缘模糊等问题，通常在大于一个像素的范围下，会给观察者带来视觉不适。
一般在类似此种液晶显示器的电子产品中，其基本具有上玻璃基板、下玻璃基板与液晶层。而造成上述的Mura现象，是由于液晶显示器结构中的上玻璃基板与下玻璃基板彼此间有一定的厚度差，在液晶注入两个玻璃基板之间且封框后，会使得液晶显示器内部存在应力，导致液晶厚度不均匀。当这种应力达到一定程度时，可能导致Mura现象发生。所以不仅液晶显示器本身有可能会出现Mura现象，与液晶显示器贴合的触控面板也因存在一定的厚度差，使得此种复合式产品经贴合后受到的应力加重，而增大Mura产生的机率。
因此，亟需提出一种可以解决或降低Mura现象发生的手段。
发明内容
本发明的目的在于提出一种多层结构的光学黏结层，用以解决或降低Mura现象发生的机率。
根据本发明实施例所揭露之一种多层结构的光学黏结层，包括一感压式双面黏结层，具有一第一表面与一第二表面；以及一热流动式感压双面黏结层，具有一第一表面与一第二表面，该热流动式感压双面黏结层的第一表面是与该感压式双面黏结层的第一表面彼此黏结于一体而成为一单体的双层结构，而该热流动式感压双面黏结层的第二表面贴合于一目标物体的非平整表面。
根据本发明实施例所揭露之一种多层结构的光学黏结层，包括一感压式双面黏结层，具有一第一表面与一第二表面；一热流动式感压双面黏结层，具有一第一表面与一第二表面；以及一有机基材层，贴附于该感压式双面黏结层的第一表面与该热流动式感压双面黏结层的第一表面之间而成为一单体的三层结构，而该热流动式感压双面黏结层的第二表面是贴合于一目标物体的非平整表面。
上述实施例中所揭露的热流动式感压双面黏结层，由于其具有吸收变形的物理特性，因此可以吸收类似液晶显示器或是触控显示器等电子产品表面的不平整以及残留应力，以改善上述具非平整表面物体的mura现象。
上述说明仅是本发明技术方案的概述，为了能够更清楚了解本发明的技术手段，而可依照说明书的内容予以实施，并且为了让本发明的上述和其他目的、特征和优点能够更明显易懂，以下特举较佳实施例，并配合附图，详细说明如下。
附图说明
图1显示本发明第一实施例之多层结构的光学黏结层的爆炸图。
图2显示本发明第一实施例之多层结构的光学黏结层的剖面示意图。
图3显示本发明实施例应用于触控显示器之多层结构的光学黏结层的上视图。
图4显示本发明第一实施例应用于触控显示器之多层结构的光学黏结层的剖面示意图。
图5显示本发明第二实施例之多层结构的光学黏结层的剖面示意图。
图6显示本发明第二实施例应用于触控显示器之多层结构的光学黏结层的剖面示意图。
【主要组件符号说明】
10：触控面板
20：显示面板
30：多层结构的光学黏结层
310：感压式双面黏结层
320：热流动式感压双面黏结层
312：感压式双面黏结层的第一表面
314：感压式双面黏结层的第二表面
322：热流动式感压双面黏结层的第一表面
324：热流动式感压双面黏结层的第二表面
40：多层结构的光学黏结层
410：感压式双面黏结层
420：热流动式感压双面黏结层
430：有机基材层
412：感压式双面黏结层的第一表面
414：感压式双面黏结层的第二表面
422：热流动式感压双面黏结层的第一表面
424：热流动式感压双面黏结层的第二表面
具体实施方式
有关本发明描述及其它技术内容、特点与功效，在以下配合参考附图中的实施例中的详细说明中，将可清楚地呈现。
图1与图2分别显示本发明第一实施例之多层结构的光学黏结层的爆炸图与剖面示意图。该多层结构的光学黏结层30，包括：感压式(pressure sensitive)双面黏结层310与热流动式(thermal reflow)感压双面黏结层320。其中，感压式双面黏结层310具有第一表面312与第二表面314，热流动式感压双面黏结层320亦具有第一表面322与第二表面324。热流动式感压双面黏结层320的第一表面322是与感压式双面黏结层310的第一表面312彼此黏结于一体而成为一单体的双层结构，且热流动式感压双面黏结层320的第二表面324贴合于一目标物体的非平整表面(未绘示)。
图3显示本发明实施例应用于触控显示器之多层结构的光学黏结层的上视图，而图4显示本发明第一实施例应用于触控显示器之多层结构的光学黏结层的剖面示意图。上述由感压式双面黏结层310与热流动式感压双面黏结层320所组成的多层结构的光学黏结层30，可与一触控显示器贴合，该触控显示器包括一触控面板10与一显示面板20，该显示面板20为上述的目标物体，其因为具有非平整表面而生成所述Mura现象。其中上述之感压式双面黏结层310的第二表面314是与触控面板10贴合，而热流动式感压双面黏结层320的第二表面324是与显示面板20的非平整表面贴合。因此本实施例由上而下的结构层为触控面板10、感压式双面黏结层310、热流动式感压双面黏结层320以及显示面板20。
在另一情况下，本发明所应用的触控显示器，其包含的触控面板10是为上述目标物体，而上述之感压式双面黏结层310的第二表面314是与显示面板20贴合，热流动式感压双面黏结层320的第二表面324则是与触控面板10贴合。因此本实施例由上而下的结构层为触控面板10、热流动式感压双面黏结层320、感压式双面黏结层310以及显示面板20。
图5显示本发明第二实施例之多层结构的光学黏结层的剖面示意图。此实施例之多层结构的光学黏结层40，包括：感压式双面黏结层410、热流动式感压双面黏结层420与有机基材层430。其中，感压式双面黏结层410具有第一表面412与第二表面414，热流动式感压双面黏结层420亦具有第一表面422与第二表面424，而有机基材层430，则是贴附于感压式双面黏结层410的第一表面412与热流动式感压双面黏结层420的第一表面422之间而成为一单体的三层结构，而上述热流动式感压双面黏结层420的第二表面424贴合于一目标物体的非平整表面(未绘示)。
图6显示本发明第二实施例应用于触控显示器之多层结构的光学黏结层的剖面示意图。上述由感压式双面黏结层410、有机基材层430与热流动式感压双面黏结层420所组成的多层结构的光学黏结层40，可与一触控显示器贴合，该触控显示器包括一触控面板10与一显示面板20。该显示面板20为上述的目标物体，其因为具有非平整表面而生成所述Mura现象。上述之感压式双面黏结层410的第二表面414是与触控面板10贴合，而热流动式感压双面黏结层420的第二表面424是与显示面板20的非平整表面贴合。因此本实施例由上而下的结构层为触控面板10、感压式双面黏结层410、有机基材层430、热流动式感压双面黏结层420以及显示面板20。
在另一情况下，本发明所应用的触控显示器，其包含的触控面板10是为上述目标物体，上述之感压式双面黏结层410的第二表面414是与显示面板20贴合，而热流动式感压双面黏结层420的第二表面424则是与触控面板10贴合。因此本实施例由上而下的结构层为触控面板10、热流动式感压双面黏结层420、有机基材层430、感压式双面黏结层410以及显示面板20。
在上述的第二实施例中，在感压式双面黏结层410与热流动式感压双面黏结层420之间插入有机基材层430，可降低感压式双面黏结层410的厚度，进而改善模切(die cut)性，其中上述的有机基材层430的厚度可为25-100um，而上述的感压式双面黏结层410的厚度则可搭配为25-50um。另，上述的有机基材层430的材质可为聚对苯二甲二乙酯(Polyethyleneterephthalate；简称PET)，或是其它类似的均等材质。
在上述的实施例中，其所揭露的感压式双面黏结层与热流动式感压双面黏结层可皆为双面胶带形式，且感压式双面黏结层与热流动式感压双面黏结层皆具有透明性质，使得在与触控显示器贴合状态下，仍能保持透视性。
在上述的实施例中，本发明的热流动式感压双面黏结层与目标物体的非平整表面的贴合，系以一加热程序进行全面贴合，以完全贴附于该目标物体的非平整表面，以及吸收该目标物体的残留应力，进而解决或降低Mura现象发生的机率。
另外，上述之热流动式感压双面黏结层(320、420)型态，可为热塑(thermalplastic)型、热流动(thermal flow)型及热固(thermal set)型。其中：
热塑型的胶体为固态，无/低粘性，将其加热到一定温度(温度由胶本身特性决定)，胶体变成液态，此时胶体粘性增强，但性质不改变，冷却后胶体变回固态，再升温，胶又会变成液态，是可状循环的过程。
热固型的胶体为固态，加热到一定温度(温度由胶本身特性决定)，胶体变成液态，此时胶体粘性增强，性质改变，冷却后胶体变成固态，但是再次升温，胶不会变成液态，是不可状循环的过程。
热流动型的胶体为固态，加热到一定温度(温度由胶本身特性决定)，胶介于半固半液体状态，此时胶体性质改变，粘性增强，但是需要经过再处理才能变成固态，例如：紫外线(UV)固化、加热固化、真空厌氧固化、湿气固化等等。
再者，在上述实施例中提及的感压式双面黏结层(310、410)，其胶体为固态，具有粘附性，这种胶对于压力敏感，胶体只要感应到压力就会粘在基板上，压力越大粘得越牢固，且不需要加热。
以上所述，仅是本发明的较佳实施例而已，并非对本发明作任何形式上的限制，虽然本发明已以较佳实施例揭露如上，然而并非用以限定本发明，任何熟悉本专业的技术人员，在不脱离本发明技术方案范围内，当可利用上述揭示的技术内容作出些许更动或修饰为等同变化的等效实施例，但凡是未脱离本发明技术方案的内容，依据本发明的技术实质对以上实施例所作的任何简单修改、等同变化与修饰，均仍属于本发明技术方案的范围内。

Claims (17)

1.一种多层结构的光学黏结层，其特征在于，包括：
一感压式双面黏结层，具有一第一表面与一第二表面；以及
一热流动型的热流动式感压双面黏结层，具有一第一表面与一第二表面，该热流动型的热流动式感压双面黏结层的第一表面是与该感压式双面黏结层的第一表面彼此黏结于一体而成为一单体的双层结构，而该热流动型的热流动式感压双面黏结层的第二表面是贴合于一目标物体的非平整表面。
2.根据权利要求1所述的多层结构的光学黏结层，其特征在于，所述的感压式双面黏结层与热流动型的热流动式感压双面黏结层皆为双面胶带形式。
3.根据权利要求1所述的多层结构的光学黏结层，其特征在于，所述的热流动型的热流动式感压双面黏结层与该目标物体的非平整表面的贴合，系以一加热程序进行贴合，以完全贴附该目标物体的非平整表面及吸收该目标物体的残留应力。
4.根据权利要求1所述的多层结构的光学黏结层，其特征在于，所述的感压式双面黏结层与热流动型的热流动式感压双面黏结层具有透明性质。
5.根据权利要求1所述的多层结构的光学黏结层，其特征在于，所述的热流动型的热流动式感压双面黏结层的第二表面与该目标物体的非平整表面全面贴合。
6.根据权利要求1所述的多层结构的光学黏结层，其特征在于其是与一触控显示器贴合，该触控显示器包括一触控面板与一显示面板，该显示面板是为该目标物体，其中上述之感压式双面黏结层的第二表面是与该触控面板贴合，而该热流动型的热流动式感压双面黏结层的第二表面是与该显示面板贴合。
7.根据权利要求1所述的多层结构的光学黏结层，其特征在于，其是与一触控显示器贴合，该触控显示器包括一触控面板与一显示面板，该触控面板是为该目标物体，其中上述之感压式双面黏结层的第二表面是与该显示面板贴合，而该热流动型的热流动式感压双面黏结层的第二表面是与该触控面板贴合。
8.一种多层结构的光学黏结层，其特征在于，包括：
一感压式双面黏结层，具有一第一表面与一第二表面；
一热流动型的热流动式感压双面黏结层，具有一第一表面与一第二表面；以及
一有机基材层，贴附于该感压式双面黏结层的第一表面与该热流动型的热流动式感压双面黏结层的第一表面之间而成为一单体的三层结构，而该热流动型的热流动式感压双面黏结层的第二表面是贴合于一目标物体的非平整表面。
9.根据权利要求8所述的多层结构的光学黏结层，其特征在于，所述的感压式双面黏结层与热流动型的热流动式感压双面黏结层皆为双面胶带形式。
10.根据权利要求8所述的多层结构的光学黏结层，其特征在于，所述的热流动型的热流动式感压双面黏结层与该目标物体的非平整表面的贴合，系以一加热程序进行贴合，以完全贴附该目标物体的非平整表面及吸收该目标物体的残留应力。
11.根据权利要求8所述的多层结构的光学黏结层，其特征在于，所述的感压式双面黏结层与热流动型的热流动式感压双面黏结层具有透明性质。
12.根据权利要求8所述的多层结构的光学黏结层，其特征在于，所述的热流动型的热流动式感压双面黏结层的第二表面与该目标物体的非平整表面全面贴合。
13.根据权利要求8所述的多层结构的光学黏结层，其特征在于其是与一触控显示器贴合，该触控显示器包括一触控面板与一显示面板，该显示面板是为该目标物体，所述之感压式双面黏结层的第二表面是与该触控面板贴合，而该热流动型的热流动式感压双面黏结层的第二表面是与该显示面板贴合。
14.根据权利要求8所述的多层结构的光学黏结层，其特征在于其是与一触控显示器贴合，该触控显示器包括一触控面板与一显示面板，该触控面板是为该目标物体，其中上述之感压式双面黏结层的第二表面是与该显示面板贴合，而该热流动型的热流动式感压双面黏结层的第二表面是与该触控面板贴合。
15.根据权利要求8所述的多层结构的光学黏结层，其特征在于，所述的有机基材层是为聚对苯二甲二乙酯。
16.根据权利要求8所述的多层结构的光学黏结层，其特征在于，所述的有机基材层的厚度为25-100um。
17.根据权利要求8所述的多层结构的光学黏结层，其特征在于，所述的感压式双面黏结层的厚度为25-50um。
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