CN107075324B - 显示器窗膜以及包含其的显示装置 - Google Patents
显示器窗膜以及包含其的显示装置 Download PDFInfo
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- CN107075324B CN107075324B CN201580060776.5A CN201580060776A CN107075324B CN 107075324 B CN107075324 B CN 107075324B CN 201580060776 A CN201580060776 A CN 201580060776A CN 107075324 B CN107075324 B CN 107075324B
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- Prior art keywords
- window film
- absorber
- layer
- display
- adhesive layer
- Prior art date
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Abstract
本发明提供一种显示器窗膜以及包含其的显示装置。该显示器窗膜包括:基底层;在基底层的一侧上形成的涂层;以及在基底层的另一侧上形成的粘合层,其中涂层和/或粘合层就每一层来说包含约3wt%到约20wt%的紫外线吸收剂,且显示器窗膜在390nm或更小的波长下具有约1%或更小的透射率。本发明对于波长为390nm或更小的光来说具有低透射率,借此使得显示装置的损伤、变色或寿命缩短最小化。且当其包括UV吸收剂时可以阻挡具有390nm或更小的波长的光且可以防止UV吸收剂沉淀。本发明适用于透明显示器,具体地说,适用于透明OLED显示器。
Description
技术领域
本发明涉及一种窗膜以及包含其的显示装置。
背景技术
透明显示器意指一种具有高透射率且可以观看到其背侧的显示器。最近,透明显示器不仅应用于平面显示器,而且应用于可以折叠且可以展开的可挠式(flexible)显示器。透明显示器可以使用OLED、LCD、TFEL(薄膜电致发光显示器)以及其类似物。
透明显示器用于如户外广告领域中。发光元件,如OLED,具体地说,蓝光发射材料,由于长期曝露于UV光而可能受到损伤,由此引起OLED变色以及寿命缩短。此外,虽然传统光学显示器包含并入偏光板中以提供吸收功能的UV吸收剂,但是透明显示器不能使用此类偏光板且被典型偏光板吸收的短波长UV光因此可以到达发光装置。
发明内容
技术问题
本发明的一个方面提供了显示器窗膜,其对于波长为390nm或更小的光具有低透射率,借此使得显示装置中出现的损伤、变色或寿命缩短最小化。
本发明的另一方面提供了显示器窗膜,其当包括UV吸收剂时可以阻挡具有390nm或更小的波长的光,且可以防止UV吸收剂沉淀。
本发明的又一方面提供显示器窗膜,其适用于透明显示器,具体地说,透明OLED显示器。
技术解决方案
根据本发明的一个方面,显示器窗膜包含:基底层;在基底层的一个表面上所形成的涂层;以及在基底层的另一表面上形成的粘合层,其中基底层、涂层以及粘合层中的至少一者在每一层中包含约3重量%到约20重量%的UV吸收剂,且窗膜在390nm或更小的波长下具有约1%或更小的透射率。
根据本发明的另一个方面,显示装置包含用于上述显示器的窗膜。
有利效果
本发明提供一种显示器窗膜,所述窗膜对于波长为390nm或更小的光来说具有低透射率,借此使得显示装置的损伤、变色或寿命缩短最小化。
本发明提供一种显示器窗膜,其当包括UV吸收剂时可以阻挡具有390nm或更小的波长的光且可以防止UV吸收剂沉淀。
本发明提供一种显示器窗膜,所述窗膜适用于透明显示器,具体地说,适用于透明OLED显示器。
附图说明
图1是根据本发明的一个实施例的显示器窗膜的截面图。
图2是根据本发明的另一个实施例的显示器窗膜的截面图。
图3是根据本发明的另一个实施例的显示器窗膜的截面图。
图4是根据本发明的又一个实施例的显示器窗膜的截面图。
图5是根据本发明的一个实施例的显示装置的截面图。
具体实施方式
本发明的实施例将参照附图进行详细描述。应了解,本发明不限于以下实施例且可以不同方式实施。在附图中,为了清晰起见将省略与描述无关的部分。在通篇说明书中,类似组件将由类似元件符号表示。
本文中,空间上相对术语如“上部”和“下部”是参照附图定义。因此,应了解,术语“上表面”可以与术语“下表面”互换使用。另外,当提及一个元件如层或膜放置于另一元件“上(on)”时,其可以直接放置于另一元件上(on),或可以存在间插元件。另一方面,当提及一个元件“直接(directly on)”放置于另一元件上时,其间不存在间插元件。
本文中,术语“(甲基)丙烯酰基”是指丙烯酰基和/或甲基丙烯酰基。
本文中,术语“含固量”意指组合物的“剩余量”,不包括溶剂的量。
下文中,将参照图1描述根据本发明的一个实施例的显示器窗膜。图1是根据本发明的一个实施例的显示器窗膜的截面图。
参照图1,根据本发明的一个实施例的窗膜100包含基底层110、涂层120以及粘合层130。
基底层110支撑窗膜100且可以由光学透明材料形成。具体地说,基底层可以由玻璃基板或光学透明挠性树脂形成。更具体地说,基底层可以包含至少一种聚酯树脂,包括聚对苯二甲酸乙二酯(PET)、聚萘二甲酸乙二酯(PEN)、聚对苯二甲酸丁二酯以及聚萘二甲酸丁二酯;聚碳酸酯(PC)树脂、聚酰亚胺(PI)树脂、聚苯乙烯树脂、聚醚砜(PES)树脂、聚(甲基)丙烯酸酯树脂、硅酮树脂(silicone),以及其类似物。基底层110可以进一步包含强化材料,如玻璃纤维(glass fiber),以增强其强度。
基底层110可以具有约10μm到约200μm的厚度。在这个范围内,基底层可用于显示器窗膜中。具体地说,基底层可以具有约30μm到约100μm的厚度。
涂层120是在基底层110的一个表面上形成以保护窗膜100免受外部冲击。
涂层120可以由涂层组合物形成,所述组合物包含具有至少一种可交联官能基的树脂以及引发剂。
具有至少一种可交联官能基的树脂构成了交联结构以形成涂层120的基质,同时提高涂层120的硬度。“可交联官能基”是通过热或光来进行固化且可以包含(甲基)丙烯酸酯基、包含脂环族环氧基或缩水甘油基的环氧基、乙烯基、(甲基)丙烯酰胺基或芳基。举例来说,具有可交联官能基的树脂可以包含具有可交联官能基的硅酮树脂(silicone)。这些可以单独使用或以其两种以上的混合物形式使用。
具有可交联官能基的硅酮树脂可以是具有可交联官能基的硅氧烷树脂。具体地说,具有可交联官能基的硅氧烷树脂可以通过具有可交联官能基的单独烷氧基硅烷或具有可交联官能基的烷氧基硅烷与不含可交联官能基的不同烷氧基硅烷的混合物的水解以及缩合来制备,但不限于此。
具有可交联官能基的烷氧基硅烷可以由式1表示。不含可交联官能基的烷氧基硅烷可以由式2表示。这些可以单独使用或以其两种以上的混合物形式使用。然而,应了解本发明不限于此:
<式1>
R1 nSi(OR2)4-n
(在式1中,R1是可交联官能基,或含有可交联官能基的直链或分支链碳数为1到6的烷基,所述可交联官能基包含(甲基)丙烯酸酯基、脂环族环氧基、缩水甘油基、乙烯基、(甲基)丙烯酰胺基或芳基;R2是直链或分支链碳数为1到7的烷基;且n是整数1到3)。
<式2>
R3 mSi(OR4)4-m
(在式2中,R3是未被取代的碳数为1到20的烷基、碳数为3到8的环烷基、碳数为2到20的烯基、碳数为2到20的炔基、碳数为6到20的芳基、卤素、氨基、巯基、醚基、酯基、羰基、羧基、硝基、砜基团、醇酸基团、羧酸酯基团、具有卤素的碳数为1到20的烷基,或具有氨基的碳数为1到20的烷基;R4是碳数为1到7的烷基;且m是整数0到3)。
由式1表示的烷氧基硅烷实例可以包含2-(3,4-环氧基环己基)乙基三甲氧基硅烷、2-(3,4-环氧基环己基)乙基三乙氧基硅烷、乙烯基三甲氧基硅烷、乙烯基三乙氧基硅烷、乙烯基三丙氧基硅烷、N-(3-丙烯酰氧基-2-羟基丙基)-3-氨基丙基三甲氧基硅烷、N-(3-丙烯酰氧基-2-羟基丙基)-3-氨基丙基三乙氧基硅烷、N-(3-丙烯酰氧基-2-羟基丙基)-3-氨基丙基三丙氧基硅烷、3-丙烯酰氧基丙基甲基双(三甲氧基)硅烷、3-丙烯酰氧基丙基三甲氧基硅烷、3-丙烯酰氧基丙基三乙氧基硅烷、3-丙烯酰氧基丙基三丙氧基硅烷、3-(甲基)丙烯酰氧基丙基三甲氧基硅烷、3-(甲基)丙烯酰氧基丙基三乙氧基硅烷,以及3-(甲基)丙烯酰氧基丙基三丙氧基硅烷,但不限于此。
由式2表示的烷氧基硅烷实例可以包含四甲氧基硅烷、四乙氧基硅烷、甲基三甲氧基硅烷、甲基三乙氧基硅烷、甲基三丙氧基硅烷、二甲基二甲氧基硅烷、二甲基二乙氧基硅烷、苯基三甲氧基硅烷、苯基三乙氧基硅烷、二苯基二甲氧基硅烷、二苯基二乙氧基硅烷、三苯基甲氧基硅烷、三苯基乙氧基硅烷、乙基三乙氧基硅烷、丙基乙基三甲氧基硅烷、N-(氨基乙基-3-氨基丙基)三甲氧基硅烷、N-(2-氨基乙基-3-氨基丙基)三乙氧基硅烷、3-氨基丙基三甲氧基硅烷、3-氨基丙基三乙氧基硅烷、氯丙基三甲氧基硅烷、氯丙基三乙氧基硅烷以及十七氟癸基三甲氧基硅烷,但不限于此。
在一些实施例中,具有可交联官能基的硅氧烷树脂可以包含具有脂环族环氧基的聚倍半硅氧烷、具有脂环族环氧基的硅氧烷树脂或具有(甲基)丙烯酸酯基的笼型(cage)聚倍半硅氧烷中的至少一种。
所属领域的技术人员典型地已知水解以及缩合。具体地说,水解以及缩合可以通过将具有可交联官能基以及烷氧基硅烷基的有机硅烷与溶剂混合来进行且水解以及缩合的反应速率可以通过进一步添加催化剂来控制。催化剂可以包含酸催化剂,如盐酸、乙酸、氟化氢、硝酸、硫酸、氯磺酸以及碘酸;碱催化剂,如氨、氢氧化钾、氢氧化钠、氢氧化钡以及咪唑;离子交换树脂,如灰黄琥珀(Amberite)IRA-400、IRA-67,以及其类似物。水解以及缩合可以在室温下进行约12小时到约7天,并且可以在约60℃到约100℃下进行约2小时到约72小时以便加速反应,但不限于此。用于水解以及缩合的溶剂不受特别限制。具体地说,溶剂可以包含选自由以下组成的群组的至少一种:水、甲醇、乙醇、丙醇、异丙醇、正丁醇、叔丁醇、甲氧基丙醇,以及其两种以上的组合。
引发剂用以使硅酮树脂中的可交联官能基固化且可以包含选自光阳离子引发剂、光自由基引发剂以及其混合物中的至少一种。光阳离子引发剂可以是所属领域的技术人员已知的任何典型光阳离子引发剂。具体地说,光阳离子引发剂可以是含有阳离子以及阴离子的鎓盐。阳离子实例可以包含二芳基碘鎓,例如二苯基碘鎓(diphenyliodonium)、4-甲氧基二苯基碘鎓(4-methoxydiphenyliodonium)、双(4-甲基苯基)碘鎓(bis(4-methylphenyl)iodonium)、双(4-叔丁基苯基)碘鎓(bis(4-tert-butylphenyl)iodonium)以及双(十二烷基苯基)碘鎓(bis(dodecylphenyl)iodonium);三芳基硫鎓,如三苯基硫鎓(triphenylsulfonium)、二苯基-4-硫代苯氧基苯基硫鎓(diphenyl-4-thiophenoxyphenylsulfonium),以及(4-叔丁基苯基)二苯基硫鎓((4-tert-butylphenyl)diphenylsulfonium);以及双[4-(二苯基二氢硫基)苯基]硫化物)(bis[4-(diphenylsulfonio)phenyl]sulfide)。阴离子的实例可以包含六氟磷酸根(PF6 -)、四氟硼酸根(BF4 -)、六氟锑酸根(SbF6 -)、六氟砷酸根(AsF6 -)、六氯锑酸根(SbCl6 -)以及三氟甲磺酸根(CF3SO3 -)。光自由基引发剂可以是所属领域的技术人员已知的任何典型的光自由基引发剂。举例来说,光自由基引发剂可以包含噻吨酮、磷、三嗪、苯乙酮、二苯甲酮、安息香以及肟光自由基引发剂中的至少一种。
就固体含量而言,按100重量份的硅酮树脂计,引发剂的存在量可以是约0.1重量份到约10重量份,确切地说,约0.5重量份到约5重量份,更确切地说,约1重量份到约3重量份。在这个范围内,引发剂可以确保适合的固化引发、适合的固化速率以及适合的固化程度,借此提供高硬度。
涂层组合物可以进一步包含可交联单体。
可交联单体可以连同硅酮树脂一起发生固化以提高涂层硬度。可交联单体可以包含具有以下中的至少一种的单体:(甲基)丙烯酸酯基、如脂环族环氧基以及缩水甘油基的环氧基以及氧杂环丁烷基团。就固体含量而言,按100重量份的硅酮树脂计,可交联单体的存在量可以是约0.1重量份到约40重量份。在这个范围内,可交联单体可以使涂层实现高硬度的同时保持其挠性。
涂层120具有约1μm到约100μm的厚度。在这个厚度范围内,涂层可以用于显示器窗膜中。具体地说,涂层120可以具有约20μm到约60μm的厚度。涂层120可以具有约6H或更高的铅笔硬度,更确切地说,约7H到约10H。在这个硬度范围内,涂层可以用于显示器窗膜中,借此保护显示装置免受外部环境影响。
粘合层130是在基底层110的另一表面上形成,以使窗膜100粘附到显示装置(图1中未示出),且可以包含UV吸收剂。由于粘合层包含UV吸收剂,因此通过吸收以及阻挡不仅具有约390nm或更小波长的光,确切地说,约380nm或更小波长的光,而且具有约380nm到约390nm波长的光,可以使根据这个实施例的窗膜所应用的显示装置的外部光稳定性增强。
根据这个实施例的窗膜100不仅在约380nm或更小的波长下,而且在约390nm或更小的波长下可以具有约1%或更小的透射率。在这个范围内,窗膜可以使在窗膜下所形成的各种显示装置的外部光稳定性增强。具体地说,当用于透明OLED显示器中时,窗膜可以充分地防止蓝光发射材料由于外部光而受到损伤。具体地说,显示器窗膜可以具有约0.001%到约1%的透射率。
在粘合层130中,UV吸收剂的存在量可以是约3重量%到约20重量%,例如约3.5重量%到约15重量%、约4重量%到约15重量%或约5重量%到约10重量%。在这个范围内,可以改善根据这个实施例的窗膜所应用的显示器的外部光稳定性且可以防止由于UV吸收剂过量而以白斑形式沉淀。
粘合层130可以由粘合层用的组合物形成,如包含UV吸收剂的压敏粘合剂(PSA,pressure sensitive adhesive)以及包含UV吸收剂的OCA(光学透明粘合剂)。具体地说,粘合层130可以由粘合层用的组合物形成,所述组合物包含(甲基)丙烯酸类粘合树脂、固化剂以及UV吸收剂。
(甲基)丙烯酸类粘合树脂可以由单体混合物形成,所述单体混合物包含以下中的至少一种:含烷基的(甲基)丙烯酸类单体、含羟基的(甲基)丙烯酸类单体、含脂环基的(甲基)丙烯酸类单体、含杂脂环基的(甲基)丙烯酸类单体以及含羧酸酯基的(甲基)丙烯酸类单体。
含烷基的(甲基)丙烯酸类单体可以包含含未被取代的碳数为1到10的烷基的(甲基)丙烯酸酯。含羟基的(甲基)丙烯酸类单体可以包含含碳数为1到10的烷基的具有至少一个羟基的(甲基)丙烯酸酯。含脂环基的(甲基)丙烯酸类单体可以包含含碳数为3到10的脂环基的(甲基)丙烯酸酯。含杂脂环基的(甲基)丙烯酸酯可以包含含有碳数为3到10的杂脂环基、含有氮、氧或硫中的至少一个的(甲基)丙烯酸酯。含羧酸酯基的(甲基)丙烯酸类单体可以包含(甲基)丙烯酸。就固体含量而言,(甲基)丙烯酸类粘合树脂在粘合层组合物中的存在量可以是约80重量%或更大,例如约90重量%或更大。在这个范围内,就透射率、颜色以及其类似方面而言,可以确保适合的光学特性,且可以展现适合的粘着性。
固化剂可以包含异氰酸酯固化剂、环氧树脂固化剂、酰亚胺固化剂以及金属螯合物固化剂中的至少一种。这些固化剂可以单独使用或以其两种以上的组合形式使用。就固体含量而言,固化剂在粘合层组合物中的存在量可以是约0.1重量%到约1.5重量%。在这个范围内,粘合层组合物可以确保粘合剂的粘合强度以及适合模量。
UV吸收剂可以是在20mg/L甲苯(光程1cm)中、在380nm波长下具有约0.25AU或更大、确切地说约0.30AU到约1.0AU吸光度(absorbance)的UV吸收剂。或者,UV吸收剂可以是在20mg/L甲苯(光程1cm)中、在390nm波长下具有约0.05AU或更大、确切地说0.1AU或更大吸光度的UV吸收剂。另外,UV吸收剂可以是最大吸收波长(λmax)大于约350nm、确切地说大于约350nm到约390nm的UV吸收剂。在这个范围内,可以通过充分吸收波长为390nm或更小,例如380nm到390nm,的外部光来降低透射率,借此改善显示装置的外部光稳定性。具体地说,UV吸收剂可以是苯并三唑或三嗪紫外线吸收剂,更确切地说,廷纳芬(Tinuvin)477以及廷纳芬326中的至少一种。如本文所用,“最大吸收波长”意指最大吸收峰值时的波长,即,指示与波长相关的吸光度曲线中最大吸光度的波长。在此,“吸光度”可以通过所属领域的技术人员已知的典型方法测量。
就固体含量而言,UV吸收剂在粘合层组合物中的存在量可以是约3重量%到约20重量%。在这个范围内,可以通过在390nm或更小,例如380nm到390nm,的波长下确保1%或更小的透射率来改善外部稳定性,且可以防止由于UV吸收剂过量而以白斑形式沉淀。
粘合剂层组合物可以进一步包含硅烷偶合剂。硅烷偶合剂可以通过提高粘合层的交联程度来改善粘合层的特性,如模量。
作为硅烷偶合剂,可以使用所属领域中已知的任何典型硅烷偶合剂。举例来说,硅烷偶合剂可以包含选自由以下组成的群组中的至少一种:含环氧基结构的硅化合物,例如3-缩水甘油氧基丙基三甲氧基硅烷(3-glycidoxypropyltrimethoxysilane)、3-缩水甘油氧基丙基甲基二甲氧基硅烷(3-glycidoxypropylmethyldimethoxysilane)以及2-(3,4-环氧环己基)乙基三甲氧基硅烷(2-(3,4-epoxycyclohexyl)ethyltrimethoxysilane);含有可聚合不饱和基团的硅化合物,如乙烯基三甲氧基硅烷(vinyltrimethoxysilane)、乙烯基三乙氧基硅烷(vinyltriethoxysilane)以及(甲基)丙烯酰氧基丙基三甲氧基硅烷((meth)acryloxypropyltrimethoxysilane);含有氨基的硅化合物,例如3-氨基丙基三甲氧基硅烷(3-aminopropyltrimethoxysilane)、3-氨基丙基三乙氧基硅烷(3-aminopropyltriethoxysilane)、N-(2-氨基乙基)-3-氨基丙基三甲氧基硅烷(N-(2-aminoethyl)-3-aminopropyltrimethoxysilane)以及N-(2-氨基乙基)-3-氨基丙基甲基二甲氧基硅烷(N-(2-aminoethyl)-3-aminopropylmethyldimethoxysilane);以及3-氯丙基三甲氧基硅烷(3-chloropropyltrimethoxysilane),但不限于此。就固体含量而言,硅烷偶合剂在粘合层组合物中的存在量可以是约0.1重量%到约5重量%,确切地说约0.1重量%到约1重量%。硅烷偶合剂在这种含量范围内,窗膜可以确保适合的模量。
粘合层130可以具有约1μm到约50μm的厚度。在这个范围内,粘合层可以用于显示器窗膜中。具体地说,粘合层130可以具有约10μm到约30μm的厚度。
虽然图1中未示出,涂层120可以进一步包含上述UV吸收剂。在涂层120中,UV吸收剂的存在量可以是约3重量%到约20重量%,例如约3.5重量%到约15重量%、约4重量%到约15重量%或约5重量%到约10重量%。
接下来将参照图2描述根据本发明的另一个实施例的显示器窗膜。图2是根据本发明的另一个实施例的显示器窗膜的截面图。
参照图2,根据另一个实施例的窗膜200包含基底层110、涂层120′以及粘合层130′。根据这个实施例的窗膜与根据上述实施例的窗膜基本上相同,但其中UV吸收剂包含于涂层中而非粘合层中。
涂层120′可以由涂层组合物形成,所述涂层组合物包含前述用于涂层的树脂以及UV吸收剂。就固体含量而言,UV吸收剂在涂层组合物中的存在量可以是约3重量%到约20重量%,例如约3.5重量%到约15重量%、约4重量%到约15重量%,或约5重量%到约10重量%。UV吸收剂在这个范围内,窗膜在390nm或更小,例如380nm到390nm,的波长下可以确保1%或更小的透射率。
接下来将参照图3描述根据本发明的另一个实施例的显示器窗膜。图3是根据本发明的另一个实施例的显示器窗膜的截面图。
参照图3,根据本发明的另一个实施例的窗膜300包含基底层110、涂层120″以及粘合层130。根据这个实施例的窗膜与根据上述实施例的窗膜基本上相同,但其中UV吸收剂包含于粘合层130以及涂层120″中。即,涂层120″也包含UV吸收剂。
涂层120″可以由涂层组合物形成,所述涂层组合物包含具有至少一种上述可交联官能基的树脂、引发剂以及UV吸收剂。在涂层组合物中,UV吸收剂的存在量可以是约10重量%或更小,确切地说,约5重量%或更小,例如约0.1重量%到约5重量%。在这个含量范围内,窗膜可以确保涂层的强度以及光学特性比其中涂层包含UV吸收剂的根据上述实施例的显示器窗膜更好。
接下来将参照图4描述根据本发明又一个实施例的显示器窗膜。图4是根据本发明的又一个实施例的显示器窗膜的截面图。
参照图4,根据本发明又一个实施例的窗膜100′可以包含基底层110、涂层120以及粘合层130。根据这个实施例的窗膜100′可以具有堆叠结构,其中基底层110、粘合层130以及涂层120按规定的次序依序堆叠。根据这个实施例的窗膜与根据上述实施例的窗膜基本上相同,但其中基底层110与涂层120之间插入了粘合层130。正如在上述实施例中,UV吸收剂包含于粘合层130或涂层120中以吸收长波长紫外光,即,波长为约390nm或更小的光,例如约380nm到390nm。
根据本发明的一个实施例的透明显示器可以包含根据本发明实施例的显示器膜。具体地说,透明显示器可以是透明有机发光显示器,包含可挠性透明有机发光显示器,但不限于此。
接下来,将参照图5描述根据本发明的一个实施例的透明显示器。图5是根据本发明的一个实施例的透明显示器的截面图。
参看图5,根据本发明的一个实施例的透明显示器400包含衬底10、在衬底10上形成且包含有机发光层71的有机发光显示装置91、在有机发光显示装置91上形成的粘合层92、在粘合层92上形成的触摸屏面板93、在触摸屏面板93上形成的粘合层92,以及在粘合层92上形成的窗膜95,其中窗膜95可以包含根据本发明实施例的显示器窗膜。在这个实施例中,窗膜是在有机发光显示装置上形成。然而,透明显示器不限于有机发光显示装置,且可以是LCD(液晶显示器)、LED(发光显示器)或其类似物。
衬底10支撑着透明显示器400中所含的有机发光显示装置且可以包含可挠性衬底。举例来说,衬底10可以包含硅酮(silicone)衬底、聚酰亚胺(polyimide)衬底、聚碳酸酯(polycarbonate)衬底以及聚丙烯酸酯(polyacrylate)衬底,但不限于此。
有机发光显示装置包含有机发光层且发射光。有机发光显示装置91可以包含在衬底10上形成的缓冲层25、在缓冲层25上形成的栅电极41,以及在栅电极41与缓冲层25之间形成的栅极绝缘膜40。在栅极绝缘膜40中,形成了包含源极以及漏极区域31、32、33的主动层35。在栅极绝缘膜40上形成了具有源极以及漏极电极52、53的层间绝缘膜51。在层间绝缘膜51上形成了包含接触孔62的钝化层61,且在所述钝化层上进一步形成了第一电极70以及像素界定层80。在像素界定层80上形成了有机发光层71以及第二电极72。
粘合层92使触摸屏面板93与有机发光显示装置91彼此粘接,且可以由含有(甲基)丙烯酸酯树脂的压敏粘合剂(pressure sensitive adhesive)、交联剂、引发剂以及硅烷偶合剂形成。
触摸屏面板93感应被手指或其类似物触摸时所产生的电信号且可以由可挠性材料形成。具体地说,触摸屏面板可以由具有可挠性以及导电性的金属纳米线形成,且可以使用通过使含有导电聚合物的导电膜图案化所形成的导体。
根据本发明另一个实施例的透明显示器可以进一步包含偏光板,所述偏光板安置于根据本发明上述实施例的透明显示器的触摸屏面板93的上侧或下侧,其中偏光板可以是例如偏光膜。
根据本发明另一个实施例的透明显示器可以包含显示单元、在显示单元上表面上所形成的粘合层,以及在粘合层上表面上所形成的窗膜,其中窗膜可以包含根据本发明实施例的显示器窗膜。
粘合层可以由含有(甲基)丙烯酸酯树脂的压敏粘合剂(pressure sensitiveadhesive)、交联剂、引发剂以及硅烷偶合剂形成。
显示单元可以是有机发光显示装置、液晶显示装置、发光二极管或其类似物。举例来说,触摸屏面板可以在显示单元中形成。偏光板或封装材料(encapsulation)可以在显示单元的最上侧形成且封装材料可以是玻璃或塑料膜。
本发明的方式
下文中将参照一些实例更详细地描述本发明。应了解这些实例仅为了说明而提供,且不应以任何方式解释为限制本发明。
实例1
通过将81.49g(甲基)丙烯酸酯树脂CI207(综研(Soken),就固体含量而言为30重量%)、0.03g异氰酸酯固化剂TD75(综研)、16.3g甲基乙基酮(大井化学工业有限公司)作为稀释剂以及2.08g UV吸收剂廷纳芬326(巴斯夫(BASF))(吸光度:在20mg/L甲苯(光程1cm)中、在380nm波长下是0.35AU,且在20mg/L甲苯(光程1cm)中、在390mm波长下是0.15AU;最大吸收波长:355nm)混合来制备粘合层组合物。然后,使粘合层组合物沉积于作为基底膜的聚对苯二甲酸乙二酯(PET)膜(KEL86W,帝人-杜邦(Teijin-Dupon))的一个表面上,且在80℃下干燥3分钟以形成厚度为25μm的粘合层,转而在烘箱中、在30℃以及75%相对湿度的恒定温度/湿度条件下搁置48小时。如下制备显示器膜:通过粘合层使PET膜附着到含有丙烯酸酯基团的硅酮树脂膜硅加(Silplus)M130的下侧作为涂层。
实例2
通过将91.93g含有脂环族环氧基官能基的倍半氧硅烷树脂(环氧树脂混合聚合物(Epoxy Hybrimer),就固体含量而言为90重量%,索力普(Solips))、1.65g(4-叔丁基苯基)二苯基硫鎓三氟甲磺酸盐(奥德里奇(Aldrich)公司)作为光阳离子聚合引发剂以及6.41g甲基乙基酮作为稀释剂混合来制备涂层组合物。然后,将涂层组合物沉积于作为基底膜的聚对苯二甲酸乙二酯(PET)膜(KEL86W,帝人-杜邦)的一个表面上,且在80℃下干燥3分钟以形成厚度为25μm的涂层,转而在烘箱中、在30℃以及75%公司的恒定温度/湿度条件下搁置48小时。
通过将80.15g(甲基)丙烯酸酯树脂CI207(综研,就固体含量而言为30重量%)、0.03g异氰酸酯固化剂TD75(综研)、0.1g硅烷偶合剂A50(综研)、16.03g甲基乙基酮(大井化学工业有限公司)作为稀释剂以及3.69g UV吸收剂廷纳芬477(巴斯夫)(吸光度:在20mg/L甲苯(光程1Gm)中、在380nm波长下为0.4AU且在20mg/L甲苯(光程1cm)中、在390nm波长下为0.1AU;最大吸收波长:360nm)混合来制备粘合层组合物。然后,使粘合层组合物沉积于作为基底膜的PET离型膜(KEL86W,帝人-杜邦)的一个表面上,且在80℃下干燥3分钟以形成厚度为25μm的粘合层,转而在烘箱中、在30℃以及75%相对湿度的恒定温度/湿度条件下搁置48小时。通过使粘合层附着到其上形成有涂层的PET膜的另一个表面上来制备显示器膜。
实例3
通过将88.16g含有脂环族环氧基官能基的倍半氧硅烷树脂(环氧树脂混合聚合物,就固体含量而言为90重量%,索力普)、1.59g(4-叔丁基苯基)二苯基硫鎓三氟甲磺酸盐(奥德里奇公司)作为光阳离子聚合引发剂、6.15g甲基乙基酮作为稀释剂以及4.10g UV吸收剂廷纳芬326混合来制备涂层组合物。然后,将涂层组合物沉积于作为基底膜的聚对苯二甲酸乙二酯(PET)膜(KEL86W,帝人-杜邦)的一个表面上,在100℃下干燥30分钟,且曝露于1,000mJ/cm2的紫外光以形成厚度为50μm的涂层,转而在80℃下搁置24小时。
通过将83.22g(甲基)丙烯酸酯树脂CI207(综研,就固体含量而言为30wt%)、0.03g固化剂TD75(综研)、0.1g硅烷偶合剂A50(综研)以及16.64g甲基乙基酮(大井化学工业有限公司)作为稀释剂混合来制备粘合层组合物。然后,将粘合层组合物沉积于离型膜MRF38(三菱(Mitsubishi)公司)上,且在80℃下干燥3分钟以形成厚度为25μm的粘合层,转而在烘箱中、在30℃以及75%相对湿度的恒定温度/湿度条件下搁置48小时。通过使粘合层附着到其上形成有涂层的PET膜的另一个表面上来制备显示器膜。
实例4
通过将88.16g含有脂环族环氧基官能基的倍半氧硅烷树脂(环氧树脂混合聚合物,就固体含量而言为90重量%,索力普)、1.59g(4-叔丁基苯基)二苯基硫鎓三氟甲磺酸盐(奥德里奇公司)作为光阳离子聚合引发剂、6.15g甲基乙基酮作为稀释剂以及4.10g UV吸收剂廷纳芬477混合来制备涂层组合物。然后,将涂层组合物沉积于作为基底膜的聚对苯二甲酸乙二酯(PET)膜(KEL86W,帝人-杜邦)的一个表面上,在100℃下干燥30分钟,且曝露于1,000mJ/cm2的紫外光以形成厚度为50μm的涂层,转而在80℃下搁置24小时。
通过将83.22g(甲基)丙烯酸酯树脂CI207(综研,就固体含量而言为30重量%)、0.03g固化剂TD75(综研)、0.10g硅烷偶合剂A50(综研)以及16.64g甲基乙基酮(大井化学工业有限公司)作为稀释剂混合来制备粘合层组合物。然后,将粘合层组合物沉积于离型膜MRF38(三菱公司)上,且在80℃下干燥3分钟以形成厚度为25μm的粘合层,转而在烘箱中、在30℃以及75%相对湿度的恒定温度/湿度条件下搁置48小时。通过使粘合层附着到其上形成有涂层的PET膜的另一个表面上来制备显示器膜。
实例5
通过将88.16g含有脂环族环氧基官能基的倍半氧硅烷树脂(环氧树脂混合聚合物,就固体含量而言为90重量%,索力普)、1.59g(4-叔丁基苯基)二苯基硫鎓三氟甲磺酸盐(奥德里奇公司)作为光阳离子聚合引发剂、6.15g甲基乙基酮作为稀释剂以及4.10g UV吸收剂廷纳芬477混合来制备涂层组合物。然后,将涂层组合物沉积于作为基底膜的聚对苯二甲酸乙二酯(PET)膜(KEL86W,帝人-杜邦)的一个表面上,在100℃下干燥30分钟,且曝露于1,000mJ/cm2的紫外光以形成厚度为50μm的涂层,转而在80℃下搁置24小时。
通过将81.20g(甲基)丙烯酸酯树脂CI207(综研,就固体含量而言为30重量%)、0.03g固化剂TD75(综研)、0.10g硅烷偶合剂A50(综研)、2.44gUV吸收剂廷纳芬477以及16.64g甲基乙基酮(大井化学工业有限公司)作为稀释剂混合来制备粘合层组合物。然后,将粘合层组合物沉积于离型膜MRF38(三菱公司)上,且在80℃下干燥3分钟以形成厚度为25μm的粘合层,转而在烘箱中、在30℃以及75%相对湿度的恒定温度/湿度条件下搁置48小时。通过使粘合层附着到其上形成有涂层的PET膜的另一个表面上来制备显示器膜。
比较实例1
显示器膜是通过与实例2相同的方法制备,但其中不使用UV吸收剂廷纳芬477。
比较实例2
显示器膜是通过与实例2相同的方法制备,但其中使用廷纳芬384-2(吸光度:在20mg/L甲苯中、在380nm波长(光程1cm)下是0.17AU,且在20mg/L甲苯中、在390nm波长(光程1cm)下是0.031AU;最大吸收波长:350nm)而非廷纳芬477作为UV吸收剂。
比较实例3
显示器膜是通过与实例3相同的方法制备,但其中使用廷纳芬384-2而非廷纳芬326作为UV吸收剂。
比较实例4
显示器膜是通过与实例1相同的方法制备,但其中使用0.65g廷纳芬326而非2.08g廷纳芬326作为UV吸收剂。
比较实例5
显示器膜是通过与实例1相同的方法制备,但其中使用7.50g廷纳芬326而非2.08g廷纳芬326作为UV吸收剂。
实例以及比较实例中所制备的各种显示器膜的组分示于表1以及表2中。根据以下特性来评价实例以及比较实例中所制备的显示器膜且结果示于表1以及表2中。
(1)与波长相关的透射率:使用拉姆达(Lambda)1050UV光谱仪(珀金埃尔默(Perkin Elmer)公司)测量各种显示器膜在300nm到800nm波长下的透射率。
(2)铅笔硬度:使用铅笔硬度测试仪(新东(Heidon)),根据JIS K5400测量每个显示器膜的涂层的铅笔硬度。使用三菱6B到9H铅笔,在1kg负荷下,以45°的刮擦角度以及60mm/min的刮擦速度测量涂层上的铅笔硬度。使用某种铅笔测试5次之后,涂层具有一或多个刮痕时,使用铅笔硬度比前一支铅笔低一级的另一支铅笔再次测量铅笔硬度。所有五次均未观察到刮痕的铅笔硬度值视为膜的铅笔硬度。
(3)存储稳定性:每个显示器膜在25℃以及50%RH条件下搁置1,000小时。粘合层或涂层上沉淀有白斑被评定为X且其无沉淀被评定为○。
[表1]
表2
如表1以及表2所示,根据本发明的显示器膜在380nm到390nm的波长下具有1%或更小的透射率,借此确保显示装置的外部光稳定性高的同时,提供良好的长期可靠性。
应了解,所属领域的技术人员可以进行各种修改、变化、更改以及等效实施例,而不脱离本发明的精神和范围。
Claims (5)
1.一种显示器窗膜,其特征在于,包括:
基底层;
在所述基底层的一个表面上形成的涂层;以及
在所述基底层的另一表面上形成的粘合层,
其中所述基底层、所述涂层以及所述粘合层中的至少一个包含3重量%到20重量%的UV吸收剂,且所述显示器窗膜在390nm或更小的波长下具有1%或更小的透射率,
其中所述涂层由包含具有至少一个可交联官能基的树脂的涂层组合物形成,
所述具有至少一个可交联官能基的树脂包括含有丙烯酸酯基的硅酮树脂或含有脂环族环氧基的倍半氧硅烷树脂,
所述涂层的铅笔硬度为6H或更高,
其中所述UV吸收剂在20mg/L甲苯中、在380nm波长下具有0.25AU或更大的吸光度。
2.根据权利要求1所述的显示器窗膜,其中所述UV吸收剂包含苯并三唑紫外线吸收剂以及三嗪紫外线吸收剂中的至少一种。
3.根据权利要求1所述的显示器窗膜,其中所述粘合层是由包含(甲基)丙烯酸类粘合树脂以及固化剂的组合物形成。
4.一种显示器窗膜,其特征在于,包括:
基底层;
在所述基底层上形成的粘合层;以及
在所述粘合层上形成的涂层,
其中所述基底层、所述涂层以及所述粘合层中的至少一个包含3重量%到20重量%的UV吸收剂,且所述显示器窗膜在390nm或更小的波长下具有1%或更小的透射率,
其中所述涂层由包含具有至少一个可交联官能基的树脂的涂层组合物形成,
所述具有至少一个可交联官能基的树脂包括含有丙烯酸酯基的硅酮树脂或含有脂环族环氧基的倍半氧硅烷树脂,
所述涂层的铅笔硬度为6H或更高,其中所述UV吸收剂在20mg/L甲苯中、在380nm波长下具有0.25AU或更大的吸光度。
5.一种显示装置,其特征在于,包括根据权利要求1到权利要求4中任一权利要求所述的显示器窗膜。
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