WO2015043027A1 - 一种psva液晶面板制造方法和psva液晶面板 - Google Patents
一种psva液晶面板制造方法和psva液晶面板 Download PDFInfo
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- WO2015043027A1 WO2015043027A1 PCT/CN2013/085632 CN2013085632W WO2015043027A1 WO 2015043027 A1 WO2015043027 A1 WO 2015043027A1 CN 2013085632 W CN2013085632 W CN 2013085632W WO 2015043027 A1 WO2015043027 A1 WO 2015043027A1
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- liquid crystal
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- crystal panel
- alignment film
- psva
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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
- G02F1/13378—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
-
- 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
- G02F1/133715—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers by organic films, e.g. polymeric films by first depositing a monomer
-
- 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
- G02F1/133742—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers for homeotropic alignment
Definitions
- the present invention relates to the field of liquid crystal display, and more particularly to a PSVA liquid crystal panel manufacturing method and a PSVA liquid crystal panel.
- liquid crystal display devices LCDs
- PDPs plasma display devices
- OLED display devices OLED display devices
- TN and STN liquid crystal display modes have problems such as low contrast and poor viewing angle.
- IPS In Plan Switch and vertical alignment display mode (VA: Vertical Alignment) is obtained.
- VA Vertical Alignment
- the liquid crystal display device is mainly composed of upper and lower substrates, and negative liquid crystal molecules embedded between the two substrates like a sandwich biscuit.
- a transparent conductive layer (ITO: indium tin oxide) is formed on the inner side of the upper and lower substrates to form a vertical electric field; a negative liquid crystal embedded between the two transparent conductive layers is a long axis of liquid crystal molecules.
- the vertical alignment mode does not require a friction process in the production process, thus greatly improving its advantages in mass production.
- the original vertical alignment mode is a multi-domain vertical alignment mode (MVA: Multi-domain Vertical Alignment), which is characterized by making a certain shape of protrusion ( Rib ) on the color film side.
- MVA Multi-domain Vertical Alignment
- Multi-domain display generally 4 domains. This approach further improves the viewing angle characteristics of the vertical alignment mode.
- Patterned Vertical Alignment which is characterized by the fact that it is not necessary to make a color film side protrusion, but a color film side transparent electrode (ITO: indium tin oxide).
- a pattern such as an ITO slit (ITO Slit) is formed on the substrate, and the width of the slit is usually about 8 to 15 ⁇ m to realize multi-domain display. This method overcomes the protrusion on the side of the color film and greatly reduces the corresponding light leakage.
- the technical problem to be solved by the present invention is to provide a PSVA liquid crystal panel manufacturing method and a PSVA liquid crystal panel capable of recycling liquid crystal.
- a method for manufacturing a PSVA liquid crystal panel comprising the steps of:
- A providing an alignment film on the substrate
- the liquid crystal layer is sealed and then optically aligned.
- the active reaction monomer is placed in a solvent, and then sprayed onto the surface of the alignment film by spraying; finally, vacuum drying is performed.
- the active reaction monomer is first placed in a solvent. Due to the fluid characteristics of the solvent, the solvent can be uniformly applied to the surface of the substrate. After the solvent is removed by vacuum drying, the remaining reactive monomer can be uniformly laid on the surface of the substrate. Therefore, the use of a solvent enables uniform coating of the reactive monomer in a low cost, high efficiency manner.
- the solvent includes one or both of phenylcyclohexane or n-butylbenzene.
- the solvent used in the reaction monomer should satisfy the following conditions: 1) No reaction occurs under ultraviolet light (because some solvent remains); 2) contamination of the liquid crystal is small, and a solvent similar to a liquid crystal monomer is selected;
- Moderate boiling point a. It is quite different from the reaction monomer, which is easy to remove by thermal evaporation; b. The boiling point should not be too low, otherwise the solvent may be completely evaporated during the spraying process. In light of the above conditions, the inventors paid a creative effort to screen out phenylcyclohexane, n-butylbenzene or a mixture of the two substances as a solvent.
- the concentration range of the solvent is 50 ppm to 5000 ppm. Further, the spray method produces a droplet size smaller than lum.
- the step B includes: spraying the surface onto the surface of the alignment film and performing a spray effect inspection. If the sprayed hook does not reach a predetermined threshold, the substrate is cleaned and the solvent of the reactive monomer is re-sprayed. Vacuum drying is performed until the uniformity reaches a predetermined threshold.
- the position of the head in the spraying method is offset from directly above the substrate.
- the vacuum drying pressure is between 1 kPa and 10 kPa; the vacuum drying temperature is between 40 ° C and 60 ° C; and the time is between 300 and 1800 seconds.
- the active reactive monomer is benzyl cinnamate.
- the step A includes: coating an alignment film on one side of the two substrates, and then performing thermal curing;
- the step B includes:
- the step C includes: applying a liquid crystal on one side of the substrate with an alignment film by using a liquid crystal pre-drop process;
- the step D includes:
- a PSVA liquid crystal panel comprising a substrate, the surface of the substrate being sequentially provided with a liquid crystal layer composed of an alignment film, an active reaction monomer layer and pure liquid crystal molecules.
- the active reaction monomer layer is formed on the surface of the alignment film, and then the liquid crystal is coated, and finally the optical alignment is performed.
- the entire operation process does not need to dope the liquid crystal molecules with the reactive monomer, and the liquid crystal molecules in the liquid crystal cell are completely It can be recycled and used.
- the general PSVA panel puts high activity The monomer is placed in the liquid crystal, and these liquid crystals have some special requirements in transportation, storage and use, which improves the process complexity, and the present invention solves the problem together.
- Figure la is a schematic diagram of a pixel structure of a conventional PSVA liquid crystal panel
- Figure lb is a schematic view of the structure of Fig. la along A-A, when the cross section is not applied with an electric field;
- Figure lc is a schematic view of the structure of Fig. la along A-A, when the cross section is applied with an electric field;
- FIG. 2 is a schematic view showing a manufacturing method of a PSVA liquid crystal panel of the present invention
- FIG. 3 is a schematic view showing a pixel structure of a PSVA liquid crystal panel of the present invention.
- Embodiment 1 of the present invention is a schematic view showing a manufacturing method of Embodiment 1 of the present invention.
- Figure 5 is a schematic view showing a manufacturing method of the second embodiment of the present invention.
- the present invention discloses a method for manufacturing a PSVA liquid crystal panel 1, which comprises the steps of:
- an alignment film 51 is disposed on the substrate 20;
- the liquid crystal layer 53 is sealed and then optically aligned.
- the present invention also protects a PSVA liquid crystal panel.
- the PSVA liquid crystal panel includes a substrate 20, and the surface of the substrate is sequentially provided with an alignment film 51, an active reaction monomer layer 52, and a liquid crystal layer 53 composed of pure liquid crystal molecules.
- the active reaction monomer layer is formed on the surface of the alignment film, and then the liquid crystal is coated, and finally the optical alignment is performed.
- the entire operation process does not need to dope the liquid crystal molecules with the reactive monomer, and the liquid crystal molecules in the liquid crystal cell are completely It can be recycled and used.
- the general PSVA panel puts high-activity monomers into the liquid crystal, these liquid crystals have some special requirements in transportation, storage and use, and the process complexity is improved, and the present invention solves the problem together.
- the PSVA liquid crystal panel manufacturing method of the present embodiment includes the following steps:
- an alignment film 51 is disposed on the substrate 20;
- the liquid crystal layer 53 is sealed and then optically aligned.
- the step B includes: the step B includes: placing a solvent for protecting the active reaction monomer into a spray device, applying a spray method to the surface of the alignment film 51, and then performing a spray effect inspection if the uniformity of the spray is performed. If the predetermined threshold is not reached, the solvent of the reactive monomer is re-sprayed after the substrate is cleaned; vacuum drying is performed until the uniformity reaches a predetermined threshold. The pure water of the first active agent used is cleaned, and the second cleaning agent is pure water. The solvent is selected from the phenyl ring
- Phenylcyclohexane is a combination of functional groups often found in liquid crystal monomers, which is relatively small in liquid crystal contamination; its boiling point is 237 ° C (atmospheric pressure), neither too high nor too low; melting point: 7. 5 ° C ;
- Flash point 98. 9 ° C, relatively high; Conductivity: 8. 85E-10; Surface tension: 34. 5e_5N/m; therefore, it is very suitable as the active monomer of the present invention.
- N-butyl benzene can also be used as solvent
- Moderate boiling point It is quite different from the reactive monomer, which is easy to remove by thermal evaporation; the cost should not be too low, otherwise the solvent may be completely evaporated during the spraying process.
- the solvent has a concentration interval of 50 ppm to 5000 ppm, preferably about 100 ppm; and the spray method produces a droplet size smaller than lum.
- the position of the head is offset from directly above the substrate (i.e., not directly above the substrate).
- the inner wall of the spray equipment should be cleaned regularly.
- the vacuum drying pressure is between 1 kPa and 10 kPa; the vacuum drying temperature is between 40 ° C and 60 ° C; and the time is between 300 and 1800 seconds. Since the boiling point of the solvent used in the present embodiment is suitable, the dry gas pressure may not be subjected to a stepwise drying method, but may be used if necessary.
- the pressure of vacuum drying 2.93 kPa; the temperature of vacuum drying: 50 degrees; the drying time: 300 to 1800 seconds; since the boiling point of the solvent used in this embodiment is suitable, the dry gas pressure may not be subjected to segmental decompression. Dry method, but can also be used if needed.
- the selected reactive monomer can be used in the present invention to satisfy the following conditions:
- the melting point is preferably slightly above room temperature.
- the reactive monomer is not limited to one substance, and may be a mixture of several substances.
- the active reaction monomer is first placed in a solvent. Due to the fluid characteristics of the solvent, the solvent can be uniformly applied to the surface of the substrate. After the solvent is removed by vacuum drying, the remaining active reaction monomers can be uniformly laid on the substrate. surface. Therefore, the use of a solvent enables uniform coating of the reactive monomer in a low cost and high efficiency manner.
- the active reactive monomer can be applied to the surface of the alignment film by direct coating.
- the substrate 20 of the liquid crystal panel includes an array substrate 21 and a color filter substrate 22.
- the step A includes: coating one side of the two substrates on each other The cloth is aligned with the film 51 and then thermally cured;
- the step B includes:
- the step C includes: using a liquid crystal pre-drip process (ODF) to coat the liquid crystal 53 on one side of the substrate having the alignment film 51;
- ODF liquid crystal pre-drip process
- the step D includes:
- the PSVA liquid crystal panel manufacturing method based on the present invention can be as follows:
- Substrate Cleaning ⁇ Alignment Film Coating ⁇ Alignment Film Thermal Curing ⁇ CF Substrate Side Sealing Casing Coating ⁇ Array Substrate, CF Substrate Bilateral Active Reaction Monomer Spray ⁇ Array Substrate Side Spray Effect Inspection ⁇ Array Substrate Side spray is not ideal for substrate cleaning (rework) array substrate, CF substrate double side vacuum drying Array substrate side ODF—>vacuum bonding one> sealing frame glue UV curing one> sealing frame glue heat curing one> light matching one> cutting one> polarizing plate attaching and other processes.
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- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Liquid Crystal (AREA)
Abstract
一种PSVA液晶面板制造方法,包括步骤:A、在基板(20)上设置配向膜(51);B、在配向膜(51)表面形成活性反应单体层(52);C、在活性反应单体层(52)表面涂布液晶层(53);D、液晶层(53)密封后进行光配向。一种利用该方法制造的PSVA液晶面板。
Description
一种 PSVA液晶面板制造方法和 PSVA液晶面板
【技术领域】
本发明涉及液晶显示领域, 更具体的说, 涉及一种 PSVA 液晶面板制造方 法和 PSVA液晶面板。
【背景技术】
随着信息社会的发展, 人们对显示设备的需求得到了增长。 为了满足这种 需求, 最近几种平板显示设备, 比方说: 液晶显示器件(LCD ), 等离子体显示 器件(PDP ), OLED显示器件都得到了迅猛的发展。 在平板显示器件当中, 液 晶显示器件由于其重量低、 体积小、 能耗低的优点, 正在逐步取代冷阴极显示 设备。
但是最初出现的扭曲向列型(TN ), 超扭曲向列型(STN )液晶显示模式存 在对比度低, 视角差等问题点。 随着人们生活水平的提高, 对显示器件的要求 也越来越高, 所以以面内开关显示模式(IPS: In Plan Switch ), 垂直配向显示模 式(VA: Vertical Alignment )等广视角显示技术得到了飞跃的发展。
对于垂直配向显示模式而言, 液晶显示器件主要由上、 下两基板, 以及像 夹心饼干一样嵌入在两个基板之间的负性液晶分子组成。 在上、 下两基板的内 侧均有透明导电层(ITO: 氧化铟锡), 从而可以形成垂直电场; 在两层透明导 电层之间嵌入的负性液晶, 是一种液晶分子长轴的介电常数小于垂直于液晶分 子长轴的方向上的介电常数的液晶。 在没有垂直电场作用在液晶分子上的情况 下, 液晶分子垂直于基板表面取向, 当有垂直电场作用在液晶分子上时, 由于 液晶分子长轴的介电常数较小, 所以液晶分子在电场作用下, 会发生特定方向 的取向, 最终垂直于电场方向排列。 同面内开关(IPS )模式相比, 垂直配向模 式在生产过程中不需要摩擦工艺, 所以大大提高了其在大规模生产上的优势。
最初的垂直配向模式是一种多畴垂直配向模式( MVA: Multi-domain Vertical Alignment ), 这种模式的特点是通过在彩膜侧制作一定形状的突起( Rib ), 实现
多畴显示(一般是 4畴)。 这种方式进一步改善了垂直配向模式的视角特性。 但 是也存在相关的问题: 由于彩膜侧的突起, 使突起周围一定范围内的液晶分子 并没有实现较好的垂直取向, 所以即使在正视野, 也存在较大的漏光, 影响了 多畴垂直配向模式对比特性的提高。
随着技术的发展, 出现了相关的改进,图形化垂直配向模式(PVA: Patterned Vertical Alignment ), 其特点是不需要制作彩膜侧突起, 而是在彩膜侧透明电极 ( ITO: 氧化铟锡)上制作对应的 ITO狭缝(ITO Slit )等图案 (Pattern ), 狭缝 的宽度通常 8~15微米左右, 实现多畴显示。 这种方法克服了彩膜侧的突起, 大 幅度减少了相应的漏光。
但是以上两种技术, 都存在另外一个问题点, 无论是 MVA还是 PVA, 其突 起和 ITO狭缝处的透过率都要比正常像素区域的透过率小很多, 从而对产品总 体的透过率带来影响。
基于这一问题点, 最近出现了一种新的垂直配向模式, 其特点表现在彩膜 基板 21既不存在突起, 也不存在 ITO狭缝。 这不仅节省了彩膜的制作成本, 而 且还提高了整体的透过率。 如图 la, 图 lb和图 lc。 这种模式被称为高分子稳定 垂直配向模式(PSVA: Polymer Sustained Vertical Alignment )„ 其不仅在彩膜上 和 MVA和 PVA有所不同, 在使用的液晶上也有所差别, 以及阵列侧透明电极 的具体图案上也和 MVA和 PVA不同。在液晶方面, PSVA其在原先的负性液晶 30中添加了反应单体 40, 后续在通过外界影响, 使这些反应单体按照一定规律 发生反应。 在阵列基板 22侧透明电极图形上, 其使用了较小的透明电极 10宽 度和透明电极狭缝 11。
但是液晶面板在生产过程中, 液晶瓶内都会残余一部分液晶。 这些残余的 液晶通常是回收, 再提纯后, 重新利用的。 这样节省了生产成本。 但是 PSVA 的液晶由于把活性较高的反应单体直接放入液晶, 由于反应单体的浓度在回收 后无法很好的管理, 同时反应单体也会发生一些化学反应, 所以无法提纯回收 利用。
【发明内容】
本发明所要解决的技术问题是提供一种能回收利用液晶的 PSVA 液晶面板 制造方法和 PSVA液晶面板。
本发明的目的是通过以下技术方案来实现的:
一种 PSVA液晶面板制造方法, 包括步骤:
A、 在基板上设置配向膜;
B、 在配向膜表面形成活性反应单体层;
C、 在活性反应单体层表面涂布液晶层;
D、 液晶层密封后进行光配向。
进一步的, 所述步骤 B 中包括: 将活性反应单体放入溶剂中, 然后采用喷 雾方式涂布到配向膜表面; 最后进行真空干燥。 先将活性反应单体放入溶剂中, 由于溶剂的流体特性, 溶剂能平整地涂布到基板表面, 采用真空干燥去除溶剂 后, 剩余的活性反应单体就能均勾地铺设在基板表面。 因此, 采用溶剂能以低 成本、 高效率的方式实现活性反应单体的均匀涂布。
进一步的, 所述溶剂包括苯基环己烷或正丁基苯中的其中一种或两种。 反 应单体使用的溶剂应满足以下条件: 1 ) 紫外光下不会发生反应 (因为会些许 有溶剂残留); 2 ) 对液晶的污染小, 选用类似液晶单体的溶剂;
3 ) 热稳定性好, 闪点高, 不是易燃易爆物质; 4 )和固化后的 PI的浸润性 好, 易于分散; 5 )对固化后的 PI的溶解性, 溶胀性差, 不会损坏固化后的 PI 材料; 6 ) 电导率低; 7 )表面张力低; 8 )对反应单体有较好溶解性;
9 )毒性低; 10 )沸点适中: a. 和反应单体有较大差异, 便于通过热蒸发去 除; b. 沸点不能太低, 否则喷雾过程中溶剂就可能挥发完全。 综合上述条件, 发明人付出了创造性劳动, 通过测试筛选出苯基环己烷、 正丁基苯或两种物质 的混合物作为溶剂。
进一步的, 所述溶剂的浓度区间为 50ppm ~ 5000ppm。
进一步的, 所述喷雾方式产生的雾滴尺寸小于 lum。
进一步的, 所述步骤 B 中包括: 采用喷雾方式涂布到配向膜表面后进行喷 雾效果检查, 如果喷涂的均勾度没有达到预定的阈值, 对基板进行清洗后重新 喷涂活性反应单体的溶剂; 直到均匀度达到预定的阈值时再进行真空干燥。
进一步的, 所述喷雾方式中喷头的位置偏离基板的正上方。
进一步的, 所述真空干燥的气压在 lkPa~10kPa之间; 所述真空干燥的温度 在 40 °C -60 °C之间; 时间在 300~ 1800秒之间。
进一步的, 所述活性反应单体为肉桂酸苄脂。
进一步的, 所述基板有两个, 所述步骤 A包括: 在两个基板相互対置的一 面涂布配向膜, 然后进行热固化;
所述步骤 B包括:
B 1、 在任意一个基板有配向膜的一面的显示区域边缘涂布框胶;
B2、 在任意一个或两个基板有配向膜的一面喷涂活性反应单体的溶剂; B3、 将喷涂有活性反应单体溶剂的基板进行真空干燥;
所述步骤 C包括: 采用液晶预滴工艺在任意一个基板有配向膜的一面涂布 液晶;
所述步骤 D包括:
Dl、 在真空环境下将两个基板贴合;
D2、 对框胶进行热固化;
D3、 利用紫外线对活性反应单体进行配向;
D4、 切割基板, 形成液晶面板。
一种 PSVA液晶面板,所述 PSVA液晶面板包括基板,所述基板表面依次设 有配向膜、 活性反应单体层和纯液晶分子组成的液晶层。
本发明由于先在配向膜表面形成活性反应单体层, 然后再涂布液晶, 最后 进行光配向, 整个操作过程无须再往液晶分子中掺杂活性反应单体, 液晶罐体 中的液晶分子完全可以回收后进行利用。 另外, 由于一般的 PSVA 面板把高活
性单体放入液晶, 这些液晶在运输, 保存以及使用时都有一些特殊的要求, 提 高了工艺复杂度, 本发明一并解决了该问题。
【附图说明】
图 la是现有的一种 PSVA液晶面板的像素结构示意图;
图 lb是图 la沿 A-A,剖面在未加电场时的结构示意图;
图 lc是图 la沿 A-A,剖面在加电场时的结构示意图;
图 2是本发明 PSVA液晶面板制造方法示意图;
图 3是本发明 PSVA液晶面板的像素结构示意图;
图 4是本发明实施例一的制造方法示意图;
图 5是本发明实施例二的制造方法示意图;
【具体实施方式】
如图 2所示, 本发明公开了一种 PSVA液晶面板 1制造方法, 包括步骤:
A、 在基板 20上设置配向膜 51;
B、 在配向膜 51表面形成活性反应单体层 52;
C、 在活性反应单体层 52表面涂布液晶层 53;
D、 液晶层 53密封后进行光配向。
如图 3所示, 本发明还保护一种 PSVA液晶面板。 该 PSVA液晶面板包括基 板 20, 所述基板表面依次设有配向膜 51、 活性反应单体层 52和纯液晶分子组 成的液晶层 53。
本发明由于先在配向膜表面形成活性反应单体层, 然后再涂布液晶, 最后进 行光配向, 整个操作过程无须再往液晶分子中掺杂活性反应单体, 液晶罐体中 的液晶分子完全可以回收后进行利用。 另外, 由于一般的 PSVA 面板把高活性 单体放入液晶, 这些液晶在运输, 保存以及使用时都有一些特殊的要求, 提高 了工艺复杂度, 本发明一并解决了该问题。
下面结合附图和较佳的实施例对本发明作进一步说明
实施例一
如图 4所示, 本实施方式的 PSVA液晶面板制造方法, 包括步骤:
A、 在基板 20上设置配向膜 51;
B、 在配向膜 51表面形成活性反应单体层 52;
C、 在活性反应单体层 52表面涂布液晶层 53;
D、 液晶层 53密封后进行光配向。
所述步骤 B中包括: 所述步骤 B中包括: 将保护活性反应单体的溶剂放入 喷雾设备中, 采用喷雾方式涂布到配向膜 51表面, 然后进行喷雾效果检查, 如 果喷涂的均匀度没有达到预定的阈值, 对基板进行清洗后重新喷涂活性反应单 体的溶剂; 直到均匀度达到预定的阈值时再进行真空干燥。 清洗基本使用的第 一 活性剂的纯水, 第二道清洗剂是纯水。 溶剂选用苯基环
苯基环己烷是液晶单体中经常出现的一个官能团组合, 对液晶污染相对小; 其沸点为 237°C (常压), 既不是太高, 也不是太低; 熔点: 7. 5°C ;
闪点: 98. 9°C, 相对较高; 电导率: 8. 85E-10; 表面张力: 34. 5e_5N/m; 因 此很适合作,为本发明的活性反应单体。 溶剂还可以选用正丁基苯
-^■^J- S也可以将苯基环己垸和正丁基苯混合使用。 其实, 只要反应单体使用的溶剂应满足以下条件, 都能作为本发明的活性反 应单体:
1 ) 紫外光下不会发生反应 (因为会些许有溶剂残留);
2 ) 对液晶的污染小, 选用类似液晶单体的溶剂;
3 ) 热稳定性好, 闪点高, 不是易燃易爆物质;
4 )和固化后的 PI的浸润性好, 易于分散;
5 )对固化后的 PI的溶解性, 溶胀性差, 不会损坏固化后的 PI材料; 6 ) 电 导率低;
7 )表面张力低;
8 )对反应单体有较好溶解性;
9 )毒性低;
10 )沸点适中: 和反应单体有较大差异, 便于通过热蒸发去除; 费点不能太 低, 否则喷雾过程中溶剂就可能挥发完全。
所述溶剂的浓度区间为 50ppm ~ 5000ppm, 优选 lOOOppm左右; 所述喷雾方 式产生的雾滴尺寸小于 lum。所述喷雾方式中喷头的位置偏离基板的正上方(即 不能在基板的正上方)。 喷雾设备内壁要定期清扫。
所述真空干燥的气压在 lkPa~10kPa之间;所述真空干燥的温度在 40°C ~60°C 之间;时间在 300~ 1800秒之间。由于本实施例使用的溶剂本身沸点就比较合适, 所以干燥气压可以不采用分段减压干燥的方式, 不过如有需要, 也可以使用。
优选的, 真空干燥的气压: 2.93kPa; 真空干燥的温度: 50度; 干燥时间: 300~1800秒; 由于本实施例使用的溶剂本身沸点就比较合适, 所以干燥气压可 以不采用分段减压干燥的方式, 不过如有需要, 也可以使用。
等物质。
选用的活性反应单体满足下列条件都可以应用于本发明:
1 ) 紫外光下会发生自由基引导聚合反应;
2 ) 沸点较高, 在一定温度下, 不容易挥发;
3 ) 不容易在热作用下发生聚合;
4 ) 溶解性好, 容易溶解在溶剂和液晶当中;
5 ) 毒性小;
6 ) 和 PI膜的附着性好;
7 ) 熔点最好稍高于室温。
同理, 活性反应单体不限定于一种物质, 可以是几种物质的混合体。
本实施方式先将活性反应单体放入溶剂中, 由于溶剂的流体特性, 溶剂能平 整地涂布到基板表面, 采用真空干燥去除溶剂后, 剩余的活性反应单体就能均 匀地铺设在基板表面。 因此, 采用溶剂能以低成本、 高效率的方式实现活性反 应单体的均匀涂布。 当然, 采用直接涂布的方式将活性反应单体铺设到配向膜 表面即可。
实施例二
如图 5所示, 本实施方式在实施例一的基础上进一步细化, 液晶面板的基板 20包括阵列基板 21和彩膜基板 22, 所述步骤 A包括: 在两个基板相互対置的 一面涂布配向膜 51 , 然后进行热固化;
所述步骤 B包括:
Bl、 在任意一个基板 20有配向膜 51的一面的显示区域边缘涂布框胶; B2、在任意一个或两个基板 20有配向膜 51的一面喷涂活性反应单体的溶剂; B3、 检查喷雾效果, 如果喷涂的均勾度没有达到预定的阈值, 对基板 20进 行清洗后重新喷涂活性反应单体的溶剂; 直到均勾度达到预定的阈值时再进行 真空干燥。
所述步骤 C 包括: 采用液晶预滴工艺 (ODF )在任意一个基板有配向膜 51 的一面涂布液晶 53;
所述步骤 D包括:
Dl、 在真空环境下将两个基板贴合;
D2、 对框胶进行热固化;
D3、 利用紫外线对活性反应单体进行配向;
D4、 切割基板, 形成液晶面板。
从整个生产流程来看, 基于本发明的 PSVA液晶面板制造方法可以有下面几 种方式:
生产流程一
基板清洗一〉 配向膜涂布一〉 配向膜热固化一〉彩膜基板侧封框胶涂布一〉 阵列基板单侧活性反应单体喷雾一〉 喷雾效果检查一〉 喷雾不理想基板清洗 ( rework ) 阵列基板侧真空干燥一〉彩膜基板侧 0DF—〉真空贴合一〉封框 胶紫外固化一〉封框胶热固化一〉 光配向一〉切割一〉偏光板贴附等工艺。
生产流程二
基板清洗一〉配向膜涂布一〉配向膜热固化一〉阵列侧封框胶涂布一〉 阵列 基板单侧活性反应单体喷雾一〉 阵列基板侧真空干燥一〉彩膜基板侧 0DF—〉 真空贴合一〉封框胶紫外固化一〉封框胶热固化一〉 光配向一〉切割一〉偏光 板贴附等工艺。
生产流程三
基板清洗一〉 配向膜涂布一〉 配向膜热固化一〉彩膜基板侧封框胶涂布一〉 阵列基板单侧活性反应单体喷雾一〉 喷雾效果检查一〉 喷雾不理想基板清洗 ( rework ) 阵列基板侧真空干燥一〉 阵列基板侧 0DF—〉真空贴合一〉封框 胶紫外固化一〉封框胶热固化一〉 光配向一〉切割一〉偏光板贴附等工艺。
生产流程四
基板清洗一〉 配向膜涂布一〉 配向膜热固化一〉 阵列基板侧封框胶涂布一〉 阵列基板单侧活性反应单体喷雾一〉 阵列基板侧真空干燥一〉 阵列基板侧 0DF 一〉真空贴合一〉封框胶紫外固化一〉封框胶热固化一〉 光配向一〉切割一〉 偏光板贴附等工艺。
生产流程五
基板清洗一〉 配向膜涂布一〉 配向膜热固化一〉 CF基板侧封框胶涂布一〉 阵列基板, CF基板双侧活性反应单体喷雾一〉 阵列基板侧喷雾效果检查一〉 阵 列基板侧喷雾不理想基板清洗(rework ) 阵列基板、 CF基板双侧真空干燥一〉
阵列基板侧 ODF—〉真空贴合一〉封框胶紫外固化一〉封框胶热固化一〉光配 向一〉切割一〉偏光板贴附等工艺。
生产流程六
基板清洗一〉 配向膜涂布一〉 配向膜热固化一〉 阵列基板侧封框胶涂布一〉 阵列基板, CF基板双侧活性反应单体喷雾一〉 CF基板侧喷雾效果检查一〉 CF 基板侧喷雾不理想基板清洗(rework ) 阵列基板、 CF基板双侧真空干燥一〉 阵 列基板侧 0DF—〉真空贴合一〉封框胶紫外固化一〉封框胶热固化一〉光配向 一〉切割一〉偏光板贴附等工艺。
生产流程七
基板清洗一〉 配向膜涂布一〉 配向膜热固化一〉 CF基板侧封框胶涂布一〉 阵列基板, CF基板双侧活性反应单体喷雾一〉 阵列基板侧喷雾效果检查一〉 阵 列基板侧喷雾不理想基板清洗(rework ) 阵列基板、 CF基板双侧真空干燥一〉 CF基板侧 0DF— >真空贴合一〉封框胶紫外固化一〉封框胶热固化一〉光配向 一〉切割一〉偏光板贴附等工艺。
生产流程八
基板清洗一〉 配向膜涂布一〉 配向膜热固化一〉 阵列基板侧封框胶涂布一〉 阵列基板, CF基板双侧活性反应单体喷雾一〉 CF基板侧喷雾效果检查一〉 CF 基板侧喷雾不理想基板清洗(rework ) 阵列基板、 CF基板双侧真空干燥一〉 CF 基板侧 0DF—〉真空贴合一〉封框胶紫外固化一〉封框胶热固化一〉光配向一〉 切割一〉偏光板贴附等工艺。
以上内容是结合具体的优选实施方式对本发明所作的进一步详细说明, 不能 认定本发明的具体实施只局限于这些说明。 对于本发明所属技术领域的普通技 术人员来说, 在不脱离本发明构思的前提下, 还可以做出若干筒单推演或替换, 都应当视为属于本发明的保护范围。
Claims
1. 一种 PSVA液晶面板制造方法, 包括步骤:
A、 在基板上设置配向膜;
B、 在配向膜表面形成活性反应单体层;
C、 在活性反应单体层表面涂布液晶层;
D、 液晶层密封后进行光配向。
2. 如权利要求 1所述的 PSVA液晶面板制造方法, 其中, 所述步骤 B中包 括: 将活性反应单体放入溶剂中, 然后采用喷雾方式涂布到配向膜表面; 最后 进行真空干燥。
3. 如权利要求 2所述的 PSVA液晶面板制造方法, 其中, 所述溶剂包括苯 基环己烷或正丁基苯中的其中一种或两种。
4. 如权利要求 2所述的 PSVA液晶面板制造方法, 其中, 所述溶剂的浓度 区间为 50ppm ~ 5000ppm。
5. 如权利要求 2所述的 PSVA液晶面板制造方法, 其中, 所述喷雾方式产 生的雾滴尺寸小于 lum。
6. 如权利要求 2所述的 PSVA液晶面板制造方法, 其中, 所述步骤 B中包 括: 采用喷雾方式涂布到配向膜表面后进行喷雾效果检查, 如果喷涂的均匀度 没有达到预定的阈值, 对基板进行清洗后重新喷涂活性反应单体的溶剂; 直到 均匀度达到预定的阈值时再进行真空干燥。
7. 如权利要求 2所述的 PSVA液晶面板制造方法, 其中, 所述真空干燥的 气压在 lkPa~10kPa之间; 所述真空干燥的温度在 40 °C ~60 °C之间; 时间在 300~1800秒之间。
8. 如权利要求 1所述的 PSVA液晶面板制造方法, 其中, 所述活性反应单 体为肉桂酸苄脂。
9. 如权利要求 1所述的 PSVA液晶面板制造方法, 其中, 所述基板有两个,
所述步骤 A包括: 在两个基板相互対置的一面涂布配向膜, 然后进行热固化; 所述步骤 B包括:
Bl、 在任意一个基板有配向膜的一面的显示区域边缘涂布框胶;
B2、 在任意一个或两个基板有配向膜的一面喷涂活性反应单体的溶剂; B3、 将喷涂有活性反应单体溶剂的基板进行真空干燥;
所述步骤 C包括: 采用液晶预滴工艺在任意一个基板有配向膜的一面涂布 液晶;
所述步骤 D包括:
Dl、 在真空环境下将两个基板贴合;
D2、 对框胶进行热固化;
D3、 利用紫外线对活性反应单体进行配向;
D4、 切割基板, 形成液晶面板。
10. 一种 PSVA液晶面板, 其中, 所述 PSVA液晶面板包括基板, 所述基板 表面依次设有配向膜、 活性反应单体层和纯液晶分子组成的液晶层。
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| TW200931138A (en) * | 2008-01-04 | 2009-07-16 | Chunghwa Picture Tubes Ltd | Liquid crystal display panel and manufacturing method thereof |
| TW201015176A (en) * | 2008-10-09 | 2010-04-16 | Au Optronics Corp | Liquid crystal display panel and manufacturing method thereof |
| CN102122100A (zh) * | 2010-12-31 | 2011-07-13 | 友达光电股份有限公司 | 聚合物稳定配向型液晶显示面板的制造方法 |
| CN102224450A (zh) * | 2008-11-27 | 2011-10-19 | 夏普株式会社 | 液晶显示装置及其制造方法 |
| CN102566158A (zh) * | 2011-12-05 | 2012-07-11 | 深圳市华星光电技术有限公司 | 液晶基板及其制作方法 |
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| WO2012086718A1 (ja) * | 2010-12-22 | 2012-06-28 | シャープ株式会社 | 液晶表示装置及びその製造方法 |
| US20150015826A1 (en) * | 2012-01-06 | 2015-01-15 | Sharp Kabushiki Kaisha | Liquid crystal display device and method for manufacturing same |
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| TW201015176A (en) * | 2008-10-09 | 2010-04-16 | Au Optronics Corp | Liquid crystal display panel and manufacturing method thereof |
| CN102224450A (zh) * | 2008-11-27 | 2011-10-19 | 夏普株式会社 | 液晶显示装置及其制造方法 |
| CN102122100A (zh) * | 2010-12-31 | 2011-07-13 | 友达光电股份有限公司 | 聚合物稳定配向型液晶显示面板的制造方法 |
| CN102566158A (zh) * | 2011-12-05 | 2012-07-11 | 深圳市华星光电技术有限公司 | 液晶基板及其制作方法 |
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