CN105116621A - 液晶面板的制造方法 - Google Patents

液晶面板的制造方法 Download PDF

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CN105116621A
CN105116621A CN201510551234.XA CN201510551234A CN105116621A CN 105116621 A CN105116621 A CN 105116621A CN 201510551234 A CN201510551234 A CN 201510551234A CN 105116621 A CN105116621 A CN 105116621A
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liquid crystal
alignment film
tilt angle
crystal panel
manufacture method
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宋彦君
谢忠憬
赵永超
李祥
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TCL China Star Optoelectronics Technology Co Ltd
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Shenzhen China Star Optoelectronics Technology Co Ltd
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Priority to CN201510551234.XA priority Critical patent/CN105116621A/zh
Priority to US14/895,655 priority patent/US9846333B2/en
Priority to PCT/CN2015/089860 priority patent/WO2017035873A1/zh
Publication of CN105116621A publication Critical patent/CN105116621A/zh
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    • 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
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    • 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
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    • 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
    • G02F1/133753—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers with different alignment orientations or pretilt angles on a same surface, e.g. for grey scale or improved viewing angle
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    • G02—OPTICS
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    • 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
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    • 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
    • G02F1/1339—Gaskets; Spacers; Sealing of cells
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    • 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
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    • 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
    • G02F1/1343—Electrodes
    • G02F1/134309—Electrodes characterised by their geometrical arrangement
    • G02F1/134363—Electrodes characterised by their geometrical arrangement for applying an electric field parallel to the substrate, i.e. in-plane switching [IPS]
    • 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
    • G02F1/133753—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers with different alignment orientations or pretilt angles on a same surface, e.g. for grey scale or improved viewing angle
    • G02F1/133761—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers with different alignment orientations or pretilt angles on a same surface, e.g. for grey scale or improved viewing angle with different pretilt angles
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    • 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
    • G02F1/1343—Electrodes
    • G02F1/134309—Electrodes characterised by their geometrical arrangement
    • G02F1/134372—Electrodes characterised by their geometrical arrangement for fringe field switching [FFS] where the common electrode is not patterned
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    • 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
    • G02F1/137—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 characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering
    • G02F1/13775—Polymer-stabilized liquid crystal layers

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Abstract

本发明公开一种液晶面板的制造方法，其包含步骤：提供一数组基板和一彩膜基板，所述阵列基板包含一第一电极以及一第二电极，所述第一电极具有多个沟槽；涂布一第一光配向膜在所述数组基板上，并对所述第一光配向膜进行一第一照光处理，使所述第一光配向膜具有一第一预倾角；涂布一第二光配向膜在所述彩膜基板上，并对所述第二光配向膜进行一第二照光处理，使所述第二光配向膜具有一第二预倾角，其中所述第二预倾角相对于所述第一预倾角呈反平行；密封一液晶分子和一光聚合单体于所述第一配向膜和所述第二配向膜之间，以形成一液晶面板；以及对所述液晶面板进行一第三照光处理，使所述光聚合单体进行一聚合反应。

Description

液晶面板的制造方法
技术领域
本发明是有关于一种液晶面板的制造方法，特别是有关于一种具有广视角的面内横向电场开关(In-PlaneSwitch，IPS)液晶面板或边缘电厂开关(FringeFieldSwitching，FFS)液晶面板的制造方法。
背景技术
在现今的各种显示技术中，液晶显示作为一种成熟的技术被广泛接受。液晶显示器(LCD)利用了液晶的电光效应，通过电路控制液晶分子的透射率及反射率，调控背光模块发出的光透过色阻的强度，来实现不同灰阶和不同色彩的图像显示。
传统的垂直配向(VA)显示技术具有高对比、高穿透率且快速响应的优势，但其视角较差，需要设计多个显示畴(domain)来解决画面洗白(colorwashout)的问题。而传统的IPS/FFS类型的显示技术则具有广视角的特性，但相比于垂直配向的显示模式来说，其对比度较差。
故，有必要提供一种液晶面板的制造方法，结合上述两种显示模式的优点，以解决现有技术所存在的问题。
发明内容
本发明的主要目的在于提供一种液晶面板的制造方法，结合高分子稳定垂直配向(PSVA)与IPS/FFS的优点，利用垂直配向具有低暗态和预倾角的快速响应，有效改善IPS/FFS的对比度，并可获得高穿透率和广视角的显示画面，同时利用化学单体的聚合，增强液晶与配向膜之间的相互作用，有助于改善残像问题，提升面板的信赖性。
为达成本发明的前述目的，本发明一实施例提供一种液晶面板的制造方法，其特征在于：所述液晶面板的制造方法包含下列步骤：提供一数组基板和一彩膜基板，所述阵列基板包含一第一电极以及一第二电极，所述第一电极具有多个沟槽；涂布一第一光配向膜在所述数组基板上，并对所述第一光配向膜进行一第一照光处理，使所述第一光配向膜相对于所述数组基板具有一第一预倾角；涂布一第二光配向膜在所述彩膜基板上，并对所述第二光配向膜进行一第二照光处理，使所述第二光配向膜相对于所述彩膜基板具有一第二预倾角；密封一液晶分子和一光聚合单体于所述第一配向膜和所述第二配向膜之间，以形成一液晶面板；以及对所述液晶面板进行一第三照光处理，使所述光聚合单体进行一聚合反应，其中所述第二预倾角相对于所述第一预倾角呈反平行。
在本发明的一实施例中，当所述液晶分子为一正型液晶时，所述第一预倾角相对于所述沟槽的一延伸方向具有一方位角。
在本发明的一实施例中，所述方位角介于0至45度。
在本发明的一实施例中，当所述液晶分子为一负型液晶时，所述第一预倾角相对于所述沟槽的一垂直方向具有一方位角。
在本发明的一实施例中，所述方位角介于0至45度。
在本发明的一实施例中，所述第一照光处理是以分区照光的方式，使所述第一光配向膜的一上半部及一下半部相对于所述数组基板分别具有所述第一预倾角及一第三预倾角。
在本发明的一实施例中，所述第二照光处理是以分区照光的方式进行，使所述第二光配向膜的一上半部及一下半部相对于所述彩膜基板分别具有所述第二预倾角及一第四预倾角。
在本发明的一实施例中，所述第三预倾角相对于所述第四预倾角呈反平行。
在本发明的一实施例中，在所述第三照光处理后，所述液晶面板的制造方法另包含一步骤：导通所述第一电极和所述第二电极，以产生一电场，使所述液晶分子的长轴旋转至平行于所述阵列基板和所述彩膜基板。
为让本发明的上述内容能更明显易懂，下文特举优选实施例，并配合所附图式，作详细说明如下：
附图说明
图1是本发明一实施例的液晶面板的制造方法的示意图。
图2A至2B是本发明一实施例的液晶面板的制造方法中，所述阵列基板进行第一照光处理的示意图，其中图2A是使用正型液晶，图2B是使用负型液晶。
图3A至3B是本发明一实施例的液晶面板的制造方法中，所述阵列基板进行分区照光的示意图。
具体实施方式
以下各实施例的说明是参考附加的图式，用以例示本发明可用以实施的特定实施例。再者，本发明所提到的方向用语，例如上、下、顶、底、前、后、左、右、内、外、侧面、周围、中央、水平、横向、垂直、纵向、轴向、径向、最上层或最下层等，仅是参考附加图式的方向。因此，使用的方向用语是用以说明及理解本发明，而非用以限制本发明。
请参照图1A至1F所示，其揭示本发明一实施例的液晶面板的制造方法。如图1所示，所述液晶面板的制造方法首先是：(1)提供一数组基板10和一彩膜基板20。所述阵列基板10上包含了一第一电极11以及一第二电极12，所述第一电极11可以具有多个沟槽13，例如是具有多条平行沟槽的的氧化铟锡电极(ITO)。
请继续参照图1B所示，本发明一实施例的液晶面板1的制造方法接着是：(2)涂布一第一光配向膜31在所述数组基板10上，并对所述第一光配向膜31进行一第一照光处理。优选的，可将所述第一光配向膜31朝上，再进行所述第一照光处理。所述第一照光处理可例如是使用紫外光照射所述第一光配向膜31和所述阵列基板10。因此，所述第一光配向膜31可相对于所述数组基板10具有一第一预倾角。
请参照图1C所示，本发明一实施例的液晶面板的制造方法接着是：(3)涂布一第二光配向膜32在所述彩膜基板20上，并对所述第二光配向膜32进行一第二照光处理。所述第二照光处理可例如是使用紫外光照射所述第二光配向膜32和所述彩膜基板20。因此，所述第二光配向膜32相对于所述彩膜基板20具有一第二预倾角。优选的，所述第二照光处理所形成的所述第二预倾角与所述第一照光处理所形成的所述第一预倾角是呈现一个反平行的方向关系。本发明此处及下文所指的“反平行”是指二条直线(如二侧的光配向高分子)彼此平行，但两者所指方向(如二侧的光配向高分子由头端至尾端的指向)呈相反关系。
请继续参照图1D所示，本发明一实施例的液晶面板的制造方法接着是：(4)密封一液晶分子41和一光聚合单体42于所述第一配向膜31和所述第二配向膜32之间，以形成一液晶面板1。所述液晶分子41可例如是一正型液晶或一负型液晶。所述光聚合单体42可例如是可受紫外光影响而进行聚合反应的单体。
请继续参照图1E所示，本发明一实施例的液晶面板的制造方法接着是：(5)对所述液晶面板1进行一第三照光处理，使所述光聚合单体42进行一聚合反应。在本步骤中，所述光聚合单体42可与所述第一配向膜31及所述第二配向膜32聚合，而在两者表面皆形成凹凸状的结构，使所述液晶分子41在所述第一配向膜31具有所述第一预倾角，在所述第二配向膜32具有所述第二预倾角。由于所述液晶分子41具有第一预倾角及第二预倾角，可达成快速响应的效果。此外，在本步驟中，所述液晶分子41以所述第一預傾角及所述第二預傾角排列而呈現出接近垂直的配向。
请继续参照图1F所示，本发明一实施例的液晶面板的制造方法可包含：(6)导通所述第一电极11和所述第二电极12，以产生一电场。所述液晶分子41的长轴可藉由所述电场的影响而旋转至平行于所述阵列基板10和所述彩膜基板20，如此，可达成IPS或FFS的显示模式。
上述液晶面板的制造方法中，步骤(2)及(3)的顺序可以彼此互换。
请参照图2A所示，在本发明的一实施例中，当所述液晶分子41为一正型液晶时，所述第一预倾角相对于所述沟槽13的一延伸方向具有一方位角θ。优选的，所述方位角介于0至45度。
或者，请参照图2B所示，在本发明的另一实施例中，当所述液晶分子41为一负型液晶时，所述第一预倾角相对于所述沟槽的一垂直方向具有一方位角θ。优选的，所述方位角介于0至45度。
再者，请参照图3A至3B所示，其显示了当所述第一电极11依照需求而具有不同的显示畴的设计时，所述阵列基板10及所述第一配向膜31进行第一照光处理的示意图。在所述第一电极11所对应的彼此相邻的一显示畴D1和一显示畴D2的位置处，所述沟槽13通常分别具有两个延伸方向，例如虛線13a及13b，因此在电极导通之后可以形成不同电场方向，以驱动液晶分子长轴旋转至所需要的方位。在本发明的液晶面板的制造方法中，所述第一照光处理可利用分区照光的方式，使所述第一光配向膜31的一上半部，即对应所述显示畴D1的部份，以及一下半部，即对应所述显示畴D2的部份，分别具有不同的预倾角，例如上半部是形成所述第一预倾角，而下半部是形成一第三预倾角。
如图3A所示，当分区照光时，遮蔽所述阵列基板31的下半部，仅露出其上半部受到紫外光照射，因此可形成所述第一预倾角。接着，如图3B所示，遮蔽所述阵列基板31的上半部仅露出下半部受紫外光照射，因此可形成所述第三预倾角。
相似的，步骤(3)中所述第二照光处理也可以采用分区照光，使所述第二光配向膜32的一上半部及一下半部分别具有所述第二预倾角及一第四预倾角。优选的，所述第三预倾角相对于所述第四预倾角也呈现反平行的方向关系。
如上所述，利用垂直配向具有低暗态和预倾角的快速响应，有效改善IPS/FFS的对比度，并可获得高穿透率和广视角的显示画面，同时利用化学单体的聚合，增强液晶与配向膜之间的相互作用，有助于改善残像问题，提升面板的信赖性。
本发明已由上述相关实施例加以描述，然而上述实施例仅为实施本发明的范例。必需指出的是，已公开的实施例并未限制本发明的范围。相反地，包含于权利要求书的精神及范围的修改及均等设置均包括于本发明的范围内。

Claims (9)

1.一种液晶面板的制造方法，其特征在于：所述液晶面板的制造方法包含下列步骤：
提供一数组基板和一彩膜基板，所述阵列基板包含一第一电极以及一第二电极，所述第一电极具有多个沟槽；
涂布一第一光配向膜在所述数组基板上，并对所述第一光配向膜进行一第一照光处理，使所述第一光配向膜相对于所述数组基板具有一第一预倾角；
涂布一第二光配向膜在所述彩膜基板上，并对所述第二光配向膜进行一第二照光处理，使所述第二光配向膜相对于所述彩膜基板具有一第二预倾角；
密封一液晶分子和一光聚合单体于所述第一配向膜和所述第二配向膜之间，以形成一液晶面板；以及
对所述液晶面板进行一第三照光处理，使所述光聚合单体进行一聚合反应，
其中所述第二预倾角相对于所述第一预倾角呈反平行。
2.如权利要求1所述的液晶面板的制造方法，其特征在于：当所述液晶分子为一正型液晶时，所述第一预倾角相对于所述沟槽的一延伸方向具有一方位角。
3.如权利要求2所述的液晶面板的制造方法，其特征在于：所述方位角介于0至45度。
4.如权利要求1所述的液晶面板的制造方法，其特征在于：当所述液晶分子为一负型液晶时，所述第一预倾角相对于所述沟槽的一垂直方向具有一方位角。
5.如权利要求4所述的液晶面板的制造方法，其特征在于：所述方位角介于0至45度。
6.如权利要求1所述的液晶面板的制造方法，其特征在于：所述第一照光处理是以分区照光的方式进行，使所述第一光配向膜的一上半部及一下半部相对于所述数组基板分别具有所述第一预倾角及一第三预倾角。
7.如权利要求6所述的液晶面板的制造方法，其特征在于：所述第二照光处理是以分区照光的方式进行，使所述第二光配向膜的一上半部及一下半部相对于所述彩膜基板分别具有所述第二预倾角及一第四预倾角。
8.如权利要求7所述的液晶面板的制造方法，其特征在于：所述第三预倾角相对于所述第四预倾角呈反平行。
9.如权利要求1所述的液晶面板的制造方法，其特征在于：在第三照光处理后，所述液晶面板的制造方法另包含一步骤：导通所述第一电极和所述第二电极，以产生一电场，使所述液晶分子的一长轴旋转至平行于所述阵列基板和所述彩膜基板。
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