WO2015180326A1 - 光配向膜及其制作方法、液晶显示器 - Google Patents

光配向膜及其制作方法、液晶显示器 Download PDF

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WO2015180326A1
WO2015180326A1 PCT/CN2014/087314 CN2014087314W WO2015180326A1 WO 2015180326 A1 WO2015180326 A1 WO 2015180326A1 CN 2014087314 W CN2014087314 W CN 2014087314W WO 2015180326 A1 WO2015180326 A1 WO 2015180326A1
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alignment film
photo
light
manufacturing
polarized light
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PCT/CN2014/087314
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English (en)
French (fr)
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肖昂
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京东方科技集团股份有限公司
北京京东方光电科技有限公司
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Priority to US14/436,793 priority Critical patent/US20160252779A1/en
Publication of WO2015180326A1 publication Critical patent/WO2015180326A1/zh

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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • 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
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
    • G02F1/133711—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers by organic films, e.g. polymeric films
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • 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
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
    • G02F1/13378—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers by treatment of the surface, e.g. embossing, rubbing or light irradiation
    • G02F1/133788—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers by treatment of the surface, e.g. embossing, rubbing or light irradiation by light irradiation, e.g. linearly polarised light photo-polymerisation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2457/00—Electrical equipment
    • B32B2457/20—Displays, e.g. liquid crystal displays, plasma displays
    • B32B2457/202—LCD, i.e. liquid crystal displays
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K2323/00—Functional layers of liquid crystal optical display excluding electroactive liquid crystal layer characterised by chemical composition
    • C09K2323/02—Alignment layer characterised by chemical composition

Definitions

  • the present disclosure relates to the field of liquid crystal display technology, and in particular, to a photo alignment film, a method for fabricating the same, and a liquid crystal display.
  • a polyimide (PI) film is a functional film layer for ensuring that liquid crystal molecules are oriented as desired and form a certain pretilt angle, which is also called an alignment film.
  • the alignment film manufacturing process includes a patterning process.
  • the patterning of the alignment film is usually completed by using a pattern coating method, specifically:
  • the transfer plate having the alignment film orientation pattern is designed according to the size and structure of the product, and the alignment film material is bonded to the transfer plate to form an alignment film, so that the alignment film has a certain orientation, and then the transfer plate is printed.
  • the patterned alignment film is printed onto the substrate of the liquid crystal display such that the alignment film is only located in the display area of the liquid crystal display.
  • the existing graphical coating has the following disadvantages:
  • the transfer plate has a certain service life, there are maintenance and replacement costs;
  • the graphical coating has a bottleneck in the accuracy of the graphical boundary, and cannot correspond to the refined graphics
  • the graphic coating includes two processes of coating and transfer, and the production efficiency is low.
  • the present disclosure provides a photo alignment film, a method for fabricating the same, and a liquid crystal display to reduce the cost of producing a patterned alignment film and improve the production efficiency and the accuracy of the pattern boundary.
  • the present disclosure provides a method for fabricating a photo alignment film, comprising:
  • the polarized light is irradiated to the photo-alignment film through a mask plate, and the mask plate includes a light-transmitting region and an opaque region outside the light-transmitting region, and the polarized light passes through the light-transmitting region to illuminate Orienting the light alignment film;
  • the photo-alignment film corresponding to the opaque region is removed to form a patterned photo-alignment film.
  • the polarized light passes through the light-transmitting region to photopolymerize the irradiated photo-alignment film.
  • the polarized light is ultraviolet polarized light
  • the irradiation amount is 500 to 2000 mJ/cm 2 .
  • the substrate is washed with water, acetone or iso-acetone to remove the photo-alignment film corresponding to the opaque region.
  • the method further includes:
  • the substrate is subjected to a first heat treatment.
  • the temperature of the first heat treatment is 70° C. to 150° C.
  • the time of the first heat treatment is 60 s to 120 s.
  • the method further includes:
  • the substrate is subjected to a second heat treatment.
  • the second heat treatment process The temperature is from 220 ° C to 250 ° C.
  • the time of the second heat treatment is greater than 40 min.
  • the present disclosure also provides a photo-alignment film which is produced by the above-described production method.
  • the photo-alignment film is a photopolymerizable alignment film material.
  • the photopolymerizable alignment film material is a cinnamate compound.
  • the present disclosure also provides a liquid crystal display employing the photoalignment film as described above.
  • the polarized light is irradiated to the light-aligning film through a mask, and the photo-alignment film corresponding to the display region is oriented by the polarized light of the anisotropic energy, and the photo-alignment film corresponding to the non-display region other than the display region is not. Orientation occurs and the unoriented photo-alignment film is removed such that the photo-alignment film only corresponds to the display area to form a patterned photo-alignment film.
  • the technical solution of the present disclosure improves the precision of the photo-alignment film boundary, and the production efficiency is high.
  • the manufacturing cost and maintenance cost of the mask are lower than those of the transfer coating used for pattern coating, which reduces the production cost.
  • 1 to 3 are views showing a process of fabricating a photo alignment film in an embodiment of the present disclosure.
  • Figure 4a shows a photoalignment film prepared by a conventional pattern coating method
  • Figure 4b shows a photoalignment film prepared in an embodiment of the present disclosure.
  • the liquid crystal display realizes the liquid crystal molecules to be oriented as required by the alignment film and forms a certain pretilt angle.
  • the alignment film manufacturing process includes a patterning process.
  • the patterning of the alignment film is usually performed by means of pattern coating, but the formation of the alignment film has low boundary precision, low production efficiency, and high production cost and maintenance cost of the transfer sheet.
  • the present disclosure provides a method for fabricating a photo-alignment film by irradiating a light-aligning film through a mask through polarized light, and aligning the light-aligning film corresponding to the display region with polarized light of anisotropic energy.
  • the photo-alignment film corresponding to the non-display region other than the display region is not oriented, and the unoriented photo-alignment film is removed, so that the photo-alignment film only corresponds to the display region to form a patterned photo-alignment film.
  • the technical solution of the present disclosure improves the precision of the alignment film boundary and has high production efficiency.
  • the manufacturing cost and maintenance cost of the mask are lower than those of the transfer coating used for pattern coating, which reduces the production cost.
  • the orientation principle of the photo-alignment film is:
  • the polarized light of anisotropic energy is irradiated onto the photo-alignment film to cause photopolymerization of the molecular structure on the surface of the film
  • optical alignment film is a photopolymerizable alignment film material
  • conversion The photo-alignment film is a configuration conversion type alignment film material) or photodecomposition (the photo-alignment film is a photo-decomposition type alignment film material) reacts, resulting in an anisotropic distribution of the van der Waals force on the surface of the film, thereby inducing alignment of the liquid crystal molecules.
  • a method for fabricating a photo-alignment film which specifically includes:
  • the polarized light is irradiated to the photo-alignment film through a mask plate, and the mask plate includes a light-transmitting region and an opaque region outside the light-transmitting region, and the polarized light passes through the light-transmitting region to illuminate Orienting the light alignment film;
  • the photo-alignment film of the opaque region is removed to form a patterned photo-alignment film.
  • the photo-alignment film can be patterned by the mask plate, and the orientation of the photo-alignment film can be realized to form a patterned photo-alignment film, which has high production efficiency and is obtained.
  • the light alignment film boundary has high precision. Since the production cost and maintenance cost of the mask sheet relative to the transfer sheet used for the pattern coating are low, the production cost is lowered.
  • the photo-alignment film according to the present disclosure is produced by orienting a photo-alignment film.
  • the light alignment film 101 covering the entire substrate 100 may be formed on the substrate 100 by an inkjet or spin coating process.
  • the substrate 100 may be an array substrate or a color filter substrate of a liquid crystal display.
  • the temperature of the first heat treatment is 70 ° C to 150 ° C, and may be 80 ° C.
  • the time is 60s to 120s, and the time is 100s.
  • the substrate 100 is sent to a polarized light irradiation device to perform an alignment process.
  • the polarized light is irradiated to the light-aligning film 101 through the mask 20, and the direction of the arrow in FIGS. 1 and 2 is the incident direction of the polarized light, wherein the mask 20 includes the light-transmitting region 200 (corresponding to the display of the liquid crystal display) The area) and the opaque area 201 (corresponding to the non-display area of the liquid crystal display) outside the light-transmitting area 200.
  • the polarized light passes through the light-transmitting region 200 to align the irradiated light-aligning film 101 to form the photo-alignment film 10.
  • the photo-alignment film 101 corresponding to the opaque region 201 is not irradiated with polarized light, and is an unoriented photo-alignment film pattern 11, as shown in FIGS. 1 and 2.
  • the photo-alignment film is a photopolymerizable alignment film material (such as a cinnamate compound such as vinyl cinnamate or vinyl methoxycinnamate), and the polarized light is transmitted through the light-transmitting region 200 of the mask 20
  • the photoalignment film is photopolymerized.
  • the polarized light is usually ultraviolet polarized light, and the irradiation amount is 500 to 2000 mJ/cm 2 .
  • the photo-alignment film corresponding to the opaque region 201 is removed, that is, the unoriented photo-alignment film pattern 11 is removed to form a patterned photo-alignment film 10, as shown in FIGS. 2 and 3.
  • the substrate 100 may be washed with water, acetone or iso-acetone to remove the photo-alignment film corresponding to the opaque region 201.
  • the substrate 100 may be subjected to a second heat treatment to remove the cleaning agent and increase the degree of polymerization of the photo-alignment film 10.
  • the temperature of the second heat treatment is 220 ° C to 250 ° C, and may be 230 ° C.
  • the time is greater than 40 min, which can be 60 min.
  • a photo-alignment film is provided, which is prepared by the manufacturing method in the first embodiment.
  • the polarized light is irradiated through the mask plate to illuminate the light alignment film, and the mask plate includes a light-transmitting region and a location.
  • An opaque region other than the light-transmitting region the polarized light is transmitted through the light-transmitting region to orient the irradiated light-aligning film, and the light-aligning film corresponding to the opaque region is removed, thereby forming a patterned light alignment membrane.
  • the optical alignment film obtained by the above-mentioned production method has high boundary precision and improves product quality. At the same time, it also improves production efficiency and reduces production costs.
  • a liquid crystal display which includes an array substrate and a color filter substrate disposed on the cartridge, and a light alignment film is formed on the array substrate and the color filter substrate.
  • the photo-alignment film adopts the photo-alignment film in the second embodiment, and the photo-alignment film corresponds to the display region of the liquid crystal display.
  • the technical solution of the present disclosure adopts the "all-print coating + patterning process" to form a patterned photo-alignment film without using pattern coating, which saves the graphic design of the transfer plate design, material and maintenance. Cost; and the speed of full-print coating is faster than the speed of pattern coating, which reduces the production time of a single substrate and high production efficiency; the patterning boundary of the photo-alignment film is significantly improved by the etching process in the patterning process. The degree of fineness of the boundary of the light alignment film.

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Liquid Crystal (AREA)
  • Polarising Elements (AREA)

Abstract

一种光配向膜及其制作方法、液晶显示器。所述光配向膜的制作方法包括：在一基板上形成光配向薄膜；使偏振光通过一掩膜板照射所述光配向薄膜，所述掩膜板包括透光区域和位于所述透光区域以外的不透光区域，偏振光透过所述透光区域对照射的光配向薄膜进行取向；去除所述不透光区域的光配向薄膜，形成图形化的光配向膜。

Description

光配向膜及其制作方法、液晶显示器
相关申请的交叉引用
本申请主张在2014年5月30日在中国提交的中国专利申请号No.201410241216.7的优先权，其全部内容通过引用包含于此。
技术领域
本公开涉及液晶显示技术领域，特别是涉及一种光配向膜及其制作方法、液晶显示器。
背景技术
在液晶显示器中，聚酰亚胺(Polyimide，简称PI)膜是一种用于确保液晶分子按要求取向并形成一定预倾角的功能性膜层，也称为配向膜。实际应用过程中，只需要在液晶显示器的显示区域设置配向膜，而其它位置(如周边电路连接处)则不需要设置配向膜，因此，配向膜的制作工艺中包括图形化工艺。
现有技术中，通常采用图形化涂覆的方式来完成配向膜的图形化，具体为：
根据产品的尺寸和结构设计具有配向膜取向图案的转印板，将配向膜材料粘接到转印板上形成配向膜，使得配向膜具有一定的取向，再通过印刷的方式将转印板上图形化的配向膜印刷到液晶显示器的基板上，使得配向膜仅位于液晶显示器的显示区域。
其中，现有的图形化涂覆有以下几个缺点：
一、每个产品的尺寸和设计不同，不同产品的图形化涂覆需要不同的转印版，设计和材料成本高；
二、转印版有一定的使用寿命，存在维护和更换成本；
三、图形化涂覆在图形化边界精度方面存在瓶颈，无法对应精细化的图形；
四、图形化涂覆包括涂覆和转印两个过程，生产效率较低。
发明内容
为解决上述技术问题，本公开提供一种光配向膜及其制作方法、液晶显示器，以降低制作图形化的配向膜的成本，并提高生产效率和图形化边界的精度。
为解决上述技术问题，本公开提供一种光配向膜的制作方法，包括：
在一基板上形成光配向薄膜；
使偏振光通过一掩膜板照射所述光配向薄膜，所述掩膜板包括透光区域和位于所述透光区域以外的不透光区域，偏振光透过所述透光区域对照射的光配向薄膜进行取向；
去除所述不透光区域对应的光配向薄膜，形成图形化的光配向膜。
进一步地，本公开提供的光配向膜的制作方法中，所述偏振光透过所述透光区域对照射的光配向薄膜进行光聚合取向。
进一步地，本公开提供的光配向膜的制作方法中，所述偏振光为紫外偏振光，照射量为500～2000mJ/cm2。
进一步地，本公开提供的光配向膜的制作方法中，采用水、丙酮或异丙酮清洗基板，来去除所述不透光区域对应的光配向薄膜。
进一步地，本公开提供的光配向膜的制作方法中，采在所述基板上形成光配向薄膜的步骤之后，在使偏振光通过一掩膜板照射所述光配向薄膜的步骤之前还包括：
对所述基板进行第一加热处理。
进一步地，本公开提供的光配向膜的制作方法中，所述第一加热处理的温度为70℃～150℃。
进一步地，本公开提供的光配向膜的制作方法中，所述第一加热处理的时间为60s～120s。
进一步地，本公开提供的光配向膜的制作方法中，在使偏振光通过一掩膜板照射所述光配向薄膜的步骤之后还包括：
对所述基板进行第二加热处理。
进一步地，本公开提供的光配向膜的制作方法中，所述第二加热处理的 温度为220℃～250℃。
进一步地，本公开提供的光配向膜的制作方法中，所述第二加热处理的时间大于40min。
本公开还提供一种光配向膜，采用如上所述的制作方法制得。
进一步地，本公开提供的光配向膜中，所述光配向膜为光聚合型配向膜材料。
进一步地，本公开提供的光配向膜中，所述光聚合型配向膜材料为肉桂酸酯类化合物。
本公开还提供一种液晶显示器，采用了如上所述的光配向膜。
本公开的上述技术方案的有益效果如下：
上述技术方案中，使偏振光通过一掩膜板照射光配向薄膜，对应显示区域的光配向薄膜利用异向性能量的偏振光进行取向，而对应显示区域以外的非显示区域的光配向薄膜未发生取向，并去除未取向的光配向薄膜，从而使得光配向薄膜只对应显示区域，形成图形化的光配向膜。相对于现有的图形化涂覆方式形成的图形化光配向膜，本公开的技术方案提高了光配向膜边界的精度，生产效率较高。而且掩膜板的制作成本及维护成本均低于图形化涂覆使用的转印板，降低了生产成本。
附图说明
为了更清楚地说明本公开的实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本公开的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动性的前提下，还可以根据这些附图获得其他的附图。
图1-图3表示本公开的实施例中光配向膜的制作过程示意图。
图4a表示现有的图形化涂覆方式制备的光配向膜；
图4b表示本公开的实施例中制备的光配向膜。
具体实施方式
液晶显示器通过配向膜来实现液晶分子按要求取向并形成一定预倾角。 在实际应用过程中，只需要在液晶显示器的显示区域设置配向膜，而其它位置(如周边电路连接处)则不需要设置配向膜，因此，配向膜的制作工艺中包括图形化工艺。现有技术中，通常采用图形化涂覆的方式来完成配向膜的图形化，但其存在形成的配向膜边界精度低、生产效率低、转印板制作成本及维护成本较高的问题。
为了解决上述技术问题，本公开提供一种光配向膜的制作方法，通过使偏振光通过一掩膜板照射光配向薄膜，对应显示区域的光配向薄膜利用异向性能量的偏振光进行取向，而对应显示区域以外的非显示区域的光配向薄膜未发生取向，并去除未取向的光配向薄膜，从而使得光配向薄膜只对应显示区域，形成图形化的光配向膜。相对于现有的图形化涂覆方式形成的配向膜，本公开的技术方案提高了配向膜边界的精度，生产效率较高。而且掩膜板的制作成本及维护成本均低于图形化涂覆使用的转印板，降低了生产成本。
其中，光配向膜的取向原理为：
利用异向性能量的偏振光，通常为紫外光，照射在光配向薄膜上，使薄膜表面的分子结构发生不均向性的光聚合(光配向膜为光聚合型配向膜材料)、转换(光配向膜为构型转换型配向膜材料)或光分解(光配向膜为光分解型配向膜材料)反应，导致薄膜表面产生异向性分布的凡得瓦尔力，进而诱导液晶分子排列。
下面将结合附图和实施例，对本公开的具体实施方式作进一步详细描述。以下实施例用于说明本公开，但不用来限制本公开的范围。
实施例一
本公开的实施例中提供一种光配向膜的制作方法，具体包括：
在一基板上形成光配向薄膜；
使偏振光通过一掩膜板照射所述光配向薄膜，所述掩膜板包括透光区域和位于所述透光区域以外的不透光区域，偏振光透过所述透光区域对照射的光配向薄膜进行取向；
去除所述不透光区域的光配向薄膜，形成图形化的光配向膜。
通过上述步骤，可以利用掩膜板对光配向薄膜进行构图工艺的同时，实现对光配向薄膜的取向，形成图形化的光配向膜，生产效率较高，而且制得 的光配向膜边界精度高。由于掩膜板相对于图形化涂覆使用的转印板的制作成本及维护成本均较低，降低了生产成本。
需要说明的是，本公开中涉及的光配向膜由光配向薄膜取向制得。
结合图1所示，本实施例中具体可以采用喷墨或旋涂工艺在基板100上形成覆盖整个基板100的光配向薄膜101。其中，基板100可以为液晶显示器的阵列基板或彩膜基板。
在对光配向薄膜101进行取向之前，需要将涂覆有光配向薄膜101的基板100送入加热炉，进行第一加热处理。其中，第一加热处理的温度为70℃～150℃，可选为80℃。时间为60s～120s，可选为100s。
第一加热处理完成后，将基板100送入偏振光照射设备进行配向工艺。
具体的，使偏振光通过掩膜板20照射光配向薄膜101，图1和图2中的箭头方向为偏振光的入射方向，其中，掩膜板20包括透光区域200(对应液晶显示器的显示区域)和位于透光区域200以外的不透光区域201(对应液晶显示器的非显示区域)。偏振光透过透光区域200对照射的光配向薄膜101进行取向，形成光配向膜10。而不透光区域201对应的光配向薄膜101没有被偏振光照射，为未取向的光配向薄膜图案11，结合图1和图2所示。
以光配向膜为光聚合型配向膜材料(如肉桂酸乙烯酯、甲氧基肉桂酸乙烯酯等肉桂酸酯类化合物)为例，偏振光透过掩膜板20的透光区域200对照射的光配向薄膜进行光聚合取向。其中，偏振光通常为紫外偏振光，照射量为500～2000mJ/cm2。
然后，去除不透光区域201对应的光配向薄膜，即去除未取向的光配向薄膜图案11，形成图形化的光配向膜10，结合图2和图3所示。
具体可以采用水、丙酮或异丙酮清洗基板100，来去除不透光区域201对应的光配向薄膜。
在形成图形化的光配向膜10后，还可以对基板100进行第二加热处理，以去除清洗剂，并增加光配向膜10的聚合度。其中，第二加热处理的温度为220℃～250℃，可选为230℃。时间大于40min，可选为60min。
结合图4a和图4b所示，通过椭圆框线示意的区域可以看出，通过本公开的制作方法制备的光配向膜的边界精度大于通过图形化涂覆方式制备的光 配向膜的边界精度。
实施例二
本实施例中提供一种光配向膜，其采用实施例一中的制作方法制得，具体为：使偏振光通过掩膜板照射光配向薄膜，所述掩膜板包括透光区域和位于所述透光区域以外的不透光区域，偏振光透过所述透光区域对照射的光配向薄膜进行取向，并去除所述不透光区域对应的光配向薄膜，从而形成图形化的光配向膜。
相对于图形化涂覆的方式，通过上述制作方法制得的光配向膜的边界精度较高，提高了产品品质。同时，还提高了生产效率，降低了生产成本。
实施例三
本实施例中提供一种液晶显示器，包括对盒设置的阵列基板和彩膜基板，在阵列基板和彩膜基板上形成有光配向膜。其中，光配向膜采用实施例二中的光配向膜，且所述光配向膜对应液晶显示器的显示区域。
如上所述，由于提高了光配向膜的边界精度，从而提高了产品品质。同时，还降低了生产成本。
本公开的技术方案采用了“全印刷式涂覆+构图工艺”的方式，形成图形化的光配向膜，不使用图形化涂覆，节约了图形化涂覆的转印板设计、材料和维护成本；而且全印刷式涂覆的速度比图形化涂覆的速度快，减少了单张基板的生产时间，生产效率高；构图工艺中通过刻蚀工艺形成光配向膜的图形化边界，显著提高了光配向膜的边界精细程度。
以上所述仅是本公开的可选实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本公开技术原理的前提下，还可以做出若干改进和替换，这些改进和替换也应视为本公开的保护范围。

Claims (14)

  1. 一种光配向膜的制作方法，包括：
    在一基板上形成光配向薄膜；
    使偏振光通过一掩膜板照射所述光配向薄膜，所述掩膜板包括透光区域和位于所述透光区域以外的不透光区域，偏振光透过所述透光区域对照射的光配向薄膜进行取向；
    去除所述不透光区域对应的光配向薄膜，形成图形化的光配向膜。
  2. 根据权利要求1所述的制作方法，其中，所述偏振光透过所述透光区域对照射的光配向薄膜进行光聚合取向。
  3. 根据权利要求2所述的制作方法，其中，所述偏振光为紫外偏振光，照射量为500～2000mJ/cm2。
  4. 根据权利要求1所述的制作方法，其中，采用水、丙酮或异丙酮清洗基板，来去除所述不透光区域对应的光配向薄膜。
  5. 根据权利要求1所述的制作方法，其中，在所述基板上形成光配向薄膜的步骤之后，在使偏振光通过一掩膜板照射所述光配向薄膜的步骤之前还包括：
    对所述基板进行第一加热处理。
  6. 根据权利要求5所述的制作方法，其中，所述第一加热处理的温度为70℃～150℃。
  7. 根据权利要求5所述的制作方法，其中，所述第一加热处理的时间为60s～120s。
  8. 根据权利要求1所述的制作方法，其中，在使偏振光通过一掩膜板照射所述光配向薄膜的步骤之后还包括：
    对所述基板进行第二加热处理。
  9. 根据权利要求8所述的制作方法，其中，所述第二加热处理的温度为220℃～250℃。
  10. 根据权利要求8所述的制作方法，其中，所述第二加热处理的时间大于40min。
  11. 一种光配向膜，采用权利要求1-10中任一项所述的制作方法制得。
  12. 根据权利要求11所述的光配向膜，其中，所述光配向膜为光聚合型配向膜材料。
  13. 根据权利要求12所述的光配向膜，其中，所述光聚合型配向膜材料为肉桂酸酯类化合物。
  14. 一种液晶显示器，采用了权利要求11至13中任一项所述的光配向膜。
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