WO2013174028A1 - 偏光片拼接方法 - Google Patents

偏光片拼接方法 Download PDF

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Publication number
WO2013174028A1
WO2013174028A1 PCT/CN2012/076251 CN2012076251W WO2013174028A1 WO 2013174028 A1 WO2013174028 A1 WO 2013174028A1 CN 2012076251 W CN2012076251 W CN 2012076251W WO 2013174028 A1 WO2013174028 A1 WO 2013174028A1
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Prior art keywords
polarizer
splicing
substrate
cut
side portions
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PCT/CN2012/076251
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English (en)
French (fr)
Inventor
贺成明
程全
徐亮
曹荣
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深圳市华星光电技术有限公司
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Application filed by 深圳市华星光电技术有限公司 filed Critical 深圳市华星光电技术有限公司
Priority to US13/636,637 priority Critical patent/US8894797B2/en
Priority to DE112012006406.2T priority patent/DE112012006406B4/de
Publication of WO2013174028A1 publication Critical patent/WO2013174028A1/zh

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements
    • G02B5/3025—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state
    • 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
    • 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
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133528—Polarisers
    • 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
    • G02F2202/00—Materials and properties
    • G02F2202/28—Adhesive materials or arrangements

Definitions

  • the present invention relates to a manufacturing technique of a liquid crystal display, and more particularly to a method of splicing a polarizer.
  • the current liquid crystal display mainly comprises two transparent substrates, a liquid crystal layer disposed between the two substrates, and a polarizer disposed on the outer surfaces of the two substrates (Polarized) Films).
  • the aforementioned polarizer is an important part of the liquid crystal display.
  • the light When light passes through one of the polarizers, the light becomes polarized light having the same polarization direction as the polarization axis of the polarizer.
  • the liquid crystal molecules of the liquid crystal layer can be twisted by the applied electric field to control whether the polarized light passes through the other polarizer to change the brightness of each pixel of the liquid crystal display.
  • polarizer suppliers will make polarizers in the form of reels (Polarized films in Rolls) to sell. Due to the limitations of manufacturing equipment, the width of the polarizer roll currently on the market is limited (less than 2 meters), if the width of the liquid crystal display panel that the manufacturer wants to manufacture is larger than the width of the polarizer (for example, more than 2 meters) that he purchases. At the time, the manufacturer is required to perform the step of splicing the polarizer.
  • polarizer splicing technology to manufacture related products of larger size liquid crystal displays.
  • a first polarizer 80 is attached to the surface of the liquid crystal cell 9, and then a second polarizer 81 is attached to the surface of the first polarizer 80 to be attached to the surface of the liquid crystal cell 9.
  • the prior art of the polarizer splicing technique has a limited splicing precision (about 0.3 mm), and there is a certain interval 800 between the two spliced polarizers 80, 81, thereby causing the liquid crystal display to be at the interval of 800. Light leakage is generated such that pixels at positions corresponding to this interval 800 are not displayed properly.
  • the main object of the present invention is to provide a method for splicing a polarizer, which can effectively reduce the interval between the spliced polarizers and improve the light leakage of the liquid crystal display at the splicing position of the polarizer.
  • the invention provides a polarizer splicing method, which comprises the following steps:
  • planarization process includes a rolling process of rolling a pair of the cut sides and a clearing process A bubble removing process of bubbles generated after the side portions are cut after cutting.
  • the bubble cleaning process is to remove the bubbles by softening the cut side portions using hot air.
  • the anti-adhesive material is a release paper; the substrate is a glass substrate constituting the liquid crystal cell; and a spacing between the planarized first polarizer and the second polarizer Less than 0.02 mm.
  • the invention further provides a polarizing film splicing method, which comprises the following steps:
  • the side portions after the first polarizer and the second polarizer are cut are planarized.
  • the upper and lower surfaces of the side portions of the first polarizer are provided with a release-proof material; a step of the second polarizer in the step of the substrate, the side of the second polarizer is correspondingly attached to the anti-adhesive material on the side of the first polarizer; and is removed from the first polarizer In the step of separating the portion to be separated from the second polarizer, the release sheet is simultaneously removed.
  • the step of planarizing the side portions after the first polarizer and the second polarizer are cut includes a rolling process, and the side portions after the cutting are performed. Rolling.
  • the step of planarizing the side portions after the first polarizer and the second polarizer are cut further includes a bubble removing process to remove the cut side mill Air bubbles generated after pressing.
  • the bubble cleaning process is to remove the bubbles by softening the cut side portions using hot air.
  • the release sheet is a release paper.
  • the substrate is a glass substrate constituting a liquid crystal cell.
  • a spacing between the planarized first polarizer and the second polarizer is less than 0.02 mm.
  • the method of splicing the polarizer of the present invention is to directly overlap the sides of the two polarizers, and then cut and remove the cut portions of the overlapping portions, and then perform planarization processing to achieve the purpose of splicing.
  • the interval between the polarizers can be effectively reduced, thereby improving the light leakage problem of the liquid crystal display at the position where the polarizer is spliced, and improving the splicing yield of the polarizer.
  • Figure 1 is a side view of a prior art splicing polarizer.
  • 2A-2E are schematic flow charts of a preferred embodiment of a method for splicing a polarizer according to the present invention.
  • FIG. 2A to FIG. 2E are schematic flowcharts of a preferred embodiment of a method for splicing a polarizer according to the present invention.
  • the polarizer splicing method of the present invention mainly comprises the following steps:
  • the substrate 1 is preferably a transparent glass substrate constituting a liquid crystal cell, which may be a color filter substrate or a thin film transistor array substrate.
  • the upper and lower surfaces of the side portions 20 of the first polarizer 2 are preferably provided with a release adhesive 40.
  • the release sheet 40 is preferably a release paper.
  • the side portion 30 of the second polarizer 3 is preferably corresponding to the anti-adhesive material 40 attached to the upper surface of the side portion 20 of the first polarizer 2, In this way, the side portion 30 of the second polarizer 3 can be prevented from directly adhering to the side portion 20 of the first polarizer 2.
  • the cutting tool vertically cuts the overlapping portion of the first polarizer 2 and the second polarizer 3 along the vertical line C, so that the first polarized light A portion of the side portion 20 of the sheet 2 is separated from the first polarizer 2; at the same time, a portion of the side portion 30 of the second polarizer 3 is separated from the second polarizer 3.
  • the cut portions separated from the first polarizer 2 and the second polarizer 3 are removed, and the side of the first polarizer 2 is also removed.
  • the side of the second polarizer 3 originally stacked on the first polarizer 2 still has a curved length.
  • the planarization process preferably includes a rolling process to achieve planarization by rolling the cut side portions 20, 30. Since the bonding portion B of the side portions 20, 30 may generate air bubbles during the rolling process, the planarization treatment may further include a bubble removing process to remove the air bubbles generated after the side portions are crushed. Further, the bubble removing step preferably uses a tool such as a heat gun 5 to supply hot air to soften the cut side portions 20, 30, thereby removing air bubbles.
  • a tool such as a heat gun 5 to supply hot air to soften the cut side portions 20, 30, thereby removing air bubbles.
  • the second is rolled.
  • the distance between the planarized first polarizer 2 and the second polarizer 3 can be made less than 0.02 mm or even completely joined to each other.
  • the distance between the first polarizer 2 and the second polarizer 3 is less than 0.02 mm, that is, the spacing between the first polarizer 2 and the second polarizer 3 is smaller than the width of one pixel unit, corresponding to the stitching position.
  • the upper pixels can still be displayed normally without causing light leakage problems.
  • the present invention provides an improved splicing method for the polarizer, which directly overlaps the sides of the two polarizers, and then cuts the overlapping portions. And the part to be cut is removed, and then flattened to achieve the purpose of splicing.
  • the interval between the polarizers can be effectively reduced, thereby improving the light leakage problem of the liquid crystal display at the position where the polarizer is spliced, and improving the splicing yield of the polarizer.

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

Abstract

一种偏光片的拼接方法，包括以下步骤：提供基板（1）；贴附第一偏光片（2）于基板（1）；贴附第二偏光片（3）于基板（1），使得第二偏光片（3）的侧部（30）对应重叠第一偏光片（2）的侧部（20）；对应切割第一偏光片（2）与第二偏光片（3）的重叠部分；移除自第一偏光片（2）与第二偏光片（3）分离的被切割部分；以及对第一偏光片（2）与第二偏光片（3）切割后的侧部进行平坦化处理。

Description

偏光片拼接方法 技术领域
本发明是有关于液晶显示器的制造技术，特别是有关于一种偏光片拼接方法。
 背景技术
液晶显示器(Liquid crystal display，LCD)已被广泛应用于各种电子产品中。目前的液晶显示器主要包括两透明的基板、设于两基板之间的液晶层以及设于两基板外表面的偏光片(Polarized films)。
前述的偏光片是液晶显示器的重要零件。当光线通过其中一偏光片时，光线会成为偏振方向与该偏光片的偏振轴方向相同的偏振光。液晶层的液晶分子可受到外加电场控制而扭转，进而控制所述偏振光是否通过另一偏光片，以使液晶显示器的各个像素的亮度产生变化。
一般而言，偏光片供应商会将偏光片制成卷轴形式(Polarized films in Rolls)来贩卖。由于制造设备的限制，目前市场上的偏光片卷的宽度有限(低于2米)，若要制造商欲制造的液晶显示面板的宽度大于其所采购的偏光片的宽度(例如大于2米)时，制造商势必要进行拼接偏光片的步骤。
因此，目前薄膜晶体管液晶显示器的制造商都采用偏光片拼接技术来制造较大尺寸的液晶显示器的相关产品。如图1所示，一第一偏光片80会先贴附于液晶盒9的表面，接着一第二偏光片81对齐所述第一偏光片80的边缘贴附于所述液晶盒9的表面。然而，现有的偏光片拼接技术的拼接精度有限(大约为0.3毫米)，所述两拼接后的偏光片80,81之间会存在一定的间隔800，进而导致液晶显示器在此间隔800的位置产生漏光，使得对应此间隔800的位置上的像素无法正常显示。
故，有必要提供一种偏光片拼接方法，以解决现有技术所存在的问题。
 技术问题
本发明的主要目的在于提供一种偏光片拼接方法，可以有效地缩小拼接偏光片的间隔，改善液晶显示器在偏光片拼接位置的漏光问题。
 技术解决方案
本发明提供一种偏光片拼接方法，其包含下列步骤：
提供一基板；
贴附一第一偏光片于所述基板，所述第一偏光片的侧部的上下表面设有防黏材；
贴附一第二偏光片于所述基板，使得所述第二偏光片的侧部对应重叠所述第一偏光片的侧部并且对应贴附在所述第一偏光片的侧部上的防黏材上；
对应切割所述第一偏光片与第二偏光片的重叠部分；
移除自所述第一偏光片与第二偏光片分离的被切割部分以及所述防黏材；以及
对所述第一偏光片与第二偏光片切割后的侧部进行平坦化处理，其中所述平坦化处理包括一对所述切割后的侧部进行碾压的碾压工序与一清除所述切割后的侧部碾压后产生的气泡的气泡清除工序。
在本发明的一实施例中，所述气泡清除工序是使用热风软化所述切割后的侧部来移除气泡。
在本发明的一实施例中，所述防黏材是离型纸；所述基板为构成液晶盒的一玻璃基板；所述平坦化后的第一偏光片与第二偏光片之间的间距小于0.02毫米。
本发明另提供一种偏光片拼接方法，其包含下列步骤：
提供一基板；
贴附一第一偏光片于所述基板；
贴附一第二偏光片于所述基板，使得所述第二偏光片的侧部对应重叠所述第一偏光片的侧部；
对应切割所述第一偏光片与第二偏光片的重叠部分；
移除自所述第一偏光片与第二偏光片分离的被切割部分；以及
对所述第一偏光片与第二偏光片切割后的侧部进行平坦化处理。
在本发明的一实施例中，在贴附所述第一偏光片于所述基板的步骤中，所述第一偏光片的侧部的上下表面设有防黏材；在贴附所述第二偏光片于所述基板的步骤中，所述第二偏光片的侧部对应贴附在所述第一偏光片的侧部上的防黏材上；在移除自所述第一偏光片与第二偏光片分离的被切割部分的步骤中，所述防黏材同时被移除。
在本发明的一实施例中，所述对所述第一偏光片与第二偏光片切割后的侧部进行平坦化处理的步骤是包含一碾压工序，对所述切割后的侧部进行碾压。
在本发明的一实施例中，所述对所述第一偏光片与第二偏光片切割后的侧部进行平坦化处理的步骤进一步包含一气泡清除工序，清除所述切割后的侧部碾压后产生的气泡。
在本发明的一实施例中，所述气泡清除工序是使用热风软化所述切割后的侧部来移除气泡。
在本发明的一实施例中，所述防黏材是离型纸。
在本发明的一实施例中，所述基板为构成液晶盒的一玻璃基板。
在本发明的一实施例中，所述平坦化后的第一偏光片与第二偏光片之间的间距小于0.02毫米。
 有益效果
本发明的偏光片拼接方法是让两偏光片的侧部直接重叠，接着对重叠部分切割并移除被切割的部位，再进行平坦化处理，来达到拼接的目的。偏光片之间的间隔可以有效地缩小，进而改善液晶显示器在偏光片拼接位置的漏光问题，提升偏光片的拼接良率。
 附图说明
图1是现有拼接偏光片的侧视图。
图2A~图2E是本发明偏光片拼接方法一较佳实施例的流程示意图。
 本发明的最佳实施方式
为让本发明上述目的、特征及优点更明显易懂，下文特举本发明较佳实施例，并配合附图，作详细说明如下。再者，本发明所提到的方向用语，例如「上」、「下」、「前」、「后」、「左」、「右」、「内」、「外」、「侧面」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。
请参考图2A~图2E所示，图2A~图2E是本发明偏光片拼接方法一较佳实施例的流程示意图。本发明的偏光片拼接方法主要包括下列步骤：
S100：提供一基板1；
S101：贴附一第一偏光片2于所述基板1；
S102：贴附一第二偏光片3于所述基板1，使得所述第二偏光片3的侧部30对应重叠所述第一偏光片2的侧部20；
S103：对应切割所述第一偏光片2与第二偏光片3的重叠部分；
S104：移除自所述第一偏光片2与第二偏光片3分离的被切割部分；以及
S105：对所述第一偏光片2与第二偏光片3切割后的侧部20,30进行平坦化处理。
在所述步骤S100中，所述基板1优选是构成液晶盒的透明玻璃基板，其可为彩色滤光片基板或是薄膜晶体管阵列基板。
如图2A所示，在所述步骤S101中，所述第一偏光片2的侧部20的上下表面优选设有防黏材40。所述防黏材40优选为离型纸。
如图2B所示，在所述步骤S102中，所述第二偏光片3的侧部30优选是对应贴附在所述第一偏光片2的侧部20上表面的防黏材40上，如此一来，所述第二偏光片3的侧部30可避免直接黏贴在所述第一偏光片2的侧部20上。
如图2C所示，在所述步骤S103中，切割刀具会沿着垂直线C垂直地对所述第一偏光片2与第二偏光片3的重叠部分进行裁切，使得所述第一偏光片2的侧部20的一部分与所述第一偏光片2分离；同时，所述第二偏光片3的侧部30的一部分与所述第二偏光片3分离。
如图2D所示，在所述步骤S104中，自所述第一偏光片2与第二偏光片3分离的被切割部分皆被移除，同时也移除所述第一偏光片2的侧部20的上下表面的防黏材40。此时，可看出第二偏光片3原本堆叠在第一偏光片2上的侧部还留有一弯曲长度。
接着如图2E所示，在所述步骤S105中，所述平坦化处理优选包含一碾压工序，通过对所述切割后的侧部20,30进行碾压来达到平坦化。由于，碾压过程中可能会导致所述侧部20,30的接合部位B产生气泡，所述平坦化处理还可进一步包括一气泡清除工序，以清除所述侧部碾压后产生的气泡。再者，所述气泡清除工序优选是使用热风枪5等工具提供热风来软化所述切割后的侧部20,30，进而移除气泡。
如图2D及2E所示，由于所述第二偏光片3的弯曲侧部30的长度大于所述第二偏光片3与所述第一偏光片2之间的间隔，碾压所述第二偏光片3的弯曲侧部30后，可使得所述平坦化后的第一偏光片2与第二偏光片3之间的间距小于0.02毫米甚至是完整地彼此接合在一起。
由于第一偏光片2与第二偏光片3之间的间距小于0.02毫米，也就是说，第一偏光片2与第二偏光片3之间的间距小于一个像素单元的宽度，对应此拼接位置上的像素仍可正常显示而不致于产生漏光问题。
由上述说明可知，相较于现有的偏光片拼接技术的拼接精度有限的缺点，本发明提供一种改良的偏光片拼接方法，让两偏光片的侧部先直接重叠，接着对重叠部分切割并移除被切割的部位，再进行平坦化处理，来达到拼接的目的。偏光片之间的间隔可以有效地缩小，进而改善液晶显示器在偏光片拼接位置的漏光问题，提升偏光片的拼接良率。
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。
 本发明的实施方式
工业实用性
序列表自由内容

Claims (11)

  1. 一种偏光片拼接方法，其中：所述偏光片拼接方法包括下列步骤：
    提供一基板；
    贴附一第一偏光片于所述基板，所述第一偏光片的侧部的上下表面设有防黏材；
    贴附一第二偏光片于所述基板，使得所述第二偏光片的侧部对应重叠所述第一偏光片的侧部并且对应贴附在所述第一偏光片的侧部上的防黏材上；
    对应切割所述第一偏光片与第二偏光片的重叠部分；
    移除自所述第一偏光片与第二偏光片分离的被切割部分以及所述防黏材；以及
    对所述第一偏光片与第二偏光片切割后的侧部进行平坦化处理，其中所述平坦化处理包括一对所述切割后的侧部进行碾压的碾压工序与一清除所述切割后的侧部碾压后产生的气泡的气泡清除工序。
  2. 如权利要求1所述的偏光片拼接方法，其中：所述气泡清除工序是使用热风软化所述切割后的侧部来移除气泡。
  3. 如权利要求1所述的偏光片拼接方法，其中：所述防黏材为离型纸；所述基板为构成液晶盒的一玻璃基板；所述平坦化后的第一偏光片与第二偏光片之间的间距小于0.02毫米。
  4. 一种偏光片拼接方法，其中：所述偏光片拼接方法包括下列步骤：
    提供一基板；
    贴附一第一偏光片于所述基板；
    贴附一第二偏光片于所述基板，使得所述第二偏光片的侧部对应重叠所述第一偏光片的侧部；
    对应切割所述第一偏光片与第二偏光片的重叠部分；
    移除自所述第一偏光片与第二偏光片分离的被切割部分；以及
    对所述第一偏光片与第二偏光片切割后的侧部进行平坦化处理。
  5. 如权利要求4所述的偏光片拼接方法，其中：在贴附所述第一偏光片于所述基板的步骤中，所述第一偏光片的侧部的上下表面设有防黏材；在贴附所述第二偏光片于所述基板的步骤中，所述第二偏光片的侧部对应贴附在所述第一偏光片的侧部上的防黏材上；在移除自所述第一偏光片与第二偏光片分离的被切割部分的步骤中，所述防黏材同时被移除。
  6. 如权利要求4所述的偏光片拼接方法，其中：所述对所述第一偏光片与第二偏光片切割后的侧部进行平坦化处理的步骤是包含一碾压工序，对所述切割后的侧部进行碾压。
  7. 如权利要求6所述的偏光片拼接方法，其中：所述对所述第一偏光片与第二偏光片切割后的侧部进行平坦化处理的步骤进一步包含一气泡清除工序，清除所述切割后的侧部碾压后产生的气泡。
  8. 如权利要求7所述的偏光片拼接方法，其中：所述气泡清除工序是使用热风软化所述切割后的侧部来移除气泡。
  9. 如权利要求5所述的偏光片拼接方法，其中：所述防黏材为离型纸。
  10. 如权利要求4所述的偏光片拼接方法，其中：所述基板为构成液晶盒的一玻璃基板。
  11. 如权利要求4所述的偏光片拼接方法，其中：所述平坦化后的第一偏光片与第二偏光片之间的间距小于0.02毫米。
PCT/CN2012/076251 2012-05-24 2012-05-30 偏光片拼接方法 WO2013174028A1 (zh)

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