WO2015106539A1 - 封框胶的涂布方法、设备以及显示装置 - Google Patents

封框胶的涂布方法、设备以及显示装置 Download PDF

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Publication number
WO2015106539A1
WO2015106539A1 PCT/CN2014/080530 CN2014080530W WO2015106539A1 WO 2015106539 A1 WO2015106539 A1 WO 2015106539A1 CN 2014080530 W CN2014080530 W CN 2014080530W WO 2015106539 A1 WO2015106539 A1 WO 2015106539A1
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WIPO (PCT)
Prior art keywords
sealant
frame sealing
frame
coating
substrate
Prior art date
Application number
PCT/CN2014/080530
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English (en)
French (fr)
Inventor
丁金波
李健
李彬
任健
Original Assignee
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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Publication date
Application filed by 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 filed Critical 京东方科技集团股份有限公司
Priority to US14/429,883 priority Critical patent/US20160033799A1/en
Publication of WO2015106539A1 publication Critical patent/WO2015106539A1/zh

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Classifications

    • 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
    • G02F1/1339—Gaskets; Spacers; Sealing of cells
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
    • B05C5/02—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work
    • B05C5/0291—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work the material being discharged on the work through discrete orifices as discrete droplets, beads or strips that coalesce on the work or are spread on the work so as to form a continuous coating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/50—Multilayers
    • B05D7/52—Two layers
    • B05D7/54—No clear coat specified
    • B05D7/542—No clear coat specified the two layers being cured or baked together
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/50—Multilayers
    • B05D7/52—Two layers
    • B05D7/54—No clear coat specified
    • B05D7/542—No clear coat specified the two layers being cured or baked together
    • B05D7/5423—No clear coat specified the two layers being cured or baked together the two layers being applied simultaneously
    • 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
    • G02F1/1341—Filling or closing of cells

Definitions

  • Embodiments of the present invention relate to a method, apparatus, and display device for applying a sealant. Background technique
  • Liquid crystal display has the advantages of light weight, shortness, low power consumption and low heat, making liquid crystal display devices widely used in devices such as televisions, computers, tablets, and mobile phones.
  • the sealing material for the liquid crystal cell (cell) is one of the key materials in the manufacturing process of the liquid crystal display device.
  • the sealant mainly contains matrix resin (such as epoxy-acrylic resin, acrylic resin, epoxy resin, etc.), curing agent (such as heat curing agent, photoinitiator, etc.), filler (such as inorganic filler, organic filling). And a coupling agent.
  • the curing of the matrix resin is mainly carried out by ultraviolet curing and thermal curing. UV curing is fast, while thermal curing requires higher temperatures and longer periods of time.
  • a coupling agent is generally added to the sealant to improve the adhesion of the sealant.
  • the sealant is generally pre-cured with UV light and then heated for final complete cure.
  • the liquid crystal instillation is mainly carried out by a Drop Droping (ODF) method, in which liquid crystal is first dropped on an array substrate or a color film substrate, and then on another substrate (color film substrate or array substrate). The sealant is applied and the process of the box is followed.
  • ODF Drop Droping
  • Embodiments of the present invention provide a method, a device, and a display device for coating a frame sealant, so as to prevent contamination of the liquid crystal due to incomplete curing of the sealant near the liquid crystal during the curing stage, thereby improving the display performance of the liquid crystal display panel. .
  • At least one embodiment of the present invention provides a method for coating a sealant, comprising: coating an ultraviolet curable frame sealant around a display area on a substrate, and coating the outer side of the ultraviolet curable sealant Frame sealant.
  • the width of the UV-curable frame sealant is UV-curable frame sealant and The total width of the ordinary frame sealant is 1/5 ⁇ 1/2.
  • the mass percentage of the coupling agent in the UV-curable sealant is 0-2%, and the mass percentage of the coupling agent in the conventional sealant is 2% to 6%.
  • the UV-curable frame sealant and the common frame sealant are simultaneously coated; or the inner UV-curable frame sealant is coated first, and then the outer frame sealant is coated; or the first coat is applied.
  • the ordinary frame sealant on the outside of the cloth is coated with the inner UV-curable frame sealant.
  • Another embodiment of the present invention further provides a coating device for a sealant, the device comprising a drip nozzle, the drip nozzle comprising a first portion and a second portion, the two portions being non-communicable, respectively for dropping Note UV-curable frame sealant and ordinary frame sealant.
  • the coating apparatus further includes a cylinder for regulating and controlling the pressure applied to the first portion and the second portion of the drip nozzle.
  • the coating apparatus further includes two cylinders for adjusting and controlling the pressure applied to the first portion and the second portion of the drip nozzle, respectively.
  • Another embodiment of the present invention further provides a display device including an array substrate, a counter substrate, and a liquid crystal dripped between the array substrate and the opposite substrate, on the array substrate or the opposite substrate.
  • the framed capsules were coated by the method described above.
  • Figure 1 is a schematic view of a drip nozzle structure used when applying a sealant
  • FIG. 2 is a schematic view showing the positional relationship of a sealant on a substrate
  • FIG. 3 is a schematic view showing a positional relationship of a sealant obtained by coating a sealant on a substrate by using a method for coating a sealant according to an embodiment of the present invention
  • FIG. 4 is a schematic structural view of a drip nozzle in a coating device for a frame sealant according to an embodiment of the present invention
  • FIG. 5 is a schematic view showing the composition of a coating device for a frame sealant according to an embodiment of the present invention
  • FIG. 6 is a schematic view showing the composition of a device for coating a frame sealant according to an embodiment of the present invention.
  • FIG. 1 is a schematic view showing the structure of a drip nozzle used for coating a sealant.
  • the sealant is coated on the substrate by using the drip nozzle of Fig. 1, and the coating position relationship is as shown in Fig. 2.
  • a sealant 1 is disposed on a substrate 0 (e.g., a color filter substrate) in a liquid crystal display panel, and a display area on the substrate 0 includes a pixel unit 2 and a spacer 3.
  • the liquid crystal is dripped on the display area on the array substrate, and the periphery of the display area filled with the liquid crystal after passing through the cell-assemble process of the array substrate and the color filter substrate is the sealant.
  • the pre-cured sealant is first irradiated by ultraviolet light, and then the sealant is completely cured by heating. If the size of the panel is small, after the color film substrate and the array substrate are completed, the liquid crystal is substantially diffused to the entire display area and is in contact with or close to the uncured sealant. Although the panel after the box is quickly exposed to ultraviolet light for pre-cure of the sealant, the pre-cured frame sealant is not fully cured and still contains a large amount of small molecular substances such as heat curing agent, photoinitiator, and no curing. Resin and coupling agent and other substances.
  • the subsequent thermal curing is slower and longer, resulting in long-term contact of the liquid crystal with the incompletely cured frame sealant, and the small molecule in the incompletely cured frame sealant enters the liquid crystal.
  • Contaminated liquid crystal Due to the contamination of the liquid crystal caused by the curing of the sealant, the display performance of the liquid crystal display panel is affected, especially the afterimage performance is affected.
  • At least one embodiment of the present invention provides a method for coating a sealant, comprising: coating an ultraviolet curable frame sealant around a display area on a substrate, and coating the outer side of the ultraviolet curable sealant Frame sealant.
  • the above coating method uses a UV-curable frame sealant having a faster curing speed on the inner side (portion close to the display region), and the curing speed is slow but adhesive on the outer side. Good ordinary frame sealant.
  • the sealing film coating method can not only prevent the liquid crystal from being stained by the sealant, but also ensure the adhesion between the substrate and the sealant, thereby improving the display mouth of the liquid crystal panel as a whole.
  • FIG. 3 is a schematic view showing the positional relationship of the sealant obtained by the above coating method on a substrate.
  • a pixel unit 2 and a spacer 3 are disposed in a display area on the substrate 0, which is close to the display area.
  • the inner side is provided with a UV-curable frame sealant 5, and the outer side is provided with a conventional frame sealant 4.
  • ordinary frame sealant 4 uses ordinary ultraviolet light and heat-curable frame sealant.
  • the frame sealing glue which is in direct contact with the liquid crystal is made of the ultraviolet curing type frame sealing glue 5, after the completion of the pairing, the ultraviolet curing type sealing frame glue 5 which is in contact with the liquid crystal can be quickly solidified, thereby reducing the uncured sealant
  • small molecular substances for example, thermosetting resins and thermal initiators.
  • a coupling agent may be added to the sealant, and the mass percentage of the coupling agent is generally between 2% and 6%.
  • the coupling agent may be used less or not in the UV-curable frame sealant 5.
  • the mass percentage of the coupling agent in the UV-curable frame sealant 5 is between 0% and 2%.
  • the use of a UV-curable frame sealant in place of a thermosetting resin such as epoxy and a UV-curable frame sealant 5 with or without a coupling agent reduces the adhesion between the sealant and the substrate 1. . Therefore, in order to ensure the adhesion between the sealant and the substrate, in one embodiment, for example, the width of the UV-curable frame sealant 5 is 1 of the total width of the UV-curable frame sealant and the conventional sealant. /5 ⁇ 1/2.
  • the content of the epoxy resin and the coupling agent in the conventional sealant 4 can be appropriately increased to ensure the overall adhesion between the sealant and the substrate.
  • the content of the epoxy resin in the conventional sealant 4 is increased from 20% to 25% to 30% or more, and the content of the coupling agent is increased from 2% to 6% to 8% or more.
  • the UV-curable sealant sealant 5 and the conventional sealant 4 are simultaneously coated; or, in one embodiment, the inner UV-curable sealant 5 is applied first. Then, the outer frame sealant 4 is coated; or, in one embodiment, the outer frame sealant 4 is coated first, and the inner side of the ultraviolet-curable frame sealant 5 is applied.
  • step-by-step coating firstly, a kind of sealant is poured into the dripper, and the coating is coated by ODF. After the coating of the sealant is completed, another type of sealant is poured into the dripper, and Coating by ODF.
  • the method for coating the sealant applies an ultraviolet curing type sealant in the vicinity of the display area on the substrate, and applies a common sealant on the outside of the ultraviolet-curable sealant.
  • the UV-curable frame sealant can be completely cured by ultraviolet curing, and the curing speed is fast, reducing the contact time between the incompletely cured frame sealant and the liquid crystal, and the outer common frame sealant is UV-cured.
  • thermal curing to achieve complete curing, to ensure the adhesion between the sealant and the substrate therefore, can reduce the liquid crystal panel in the liquid crystal panel is surrounded by the sealant contamination, to avoid affecting afterimage performance, but also to ensure the sealant and substrate The adhesion between them improves the display quality of the liquid crystal panel.
  • At least one embodiment of the present invention also provides a coating device for a frame sealant, the device comprising a drip nozzle, and a schematic structural view thereof is shown in FIG.
  • the drip nozzle includes a first portion 11 and a second portion 12 which are respectively disposed on the left side and the right side, and the two portions are not in communication with each other for instilling the ultraviolet curable frame sealant and the ordinary frame sealant.
  • the coating apparatus further includes a cylinder for regulating and controlling the pressure applied to the first portion 11 and the second portion 12 in the drip nozzle.
  • a schematic diagram of the composition of the coating apparatus provided in this embodiment is shown in Fig. 5, which includes a drip nozzle 10 and a cylinder 20.
  • the coating pressure of the first portion 11 and the second portion 12 in the drip nozzle 10 is mainly controlled by the cylinder 20.
  • the width of the conventional sealant 4 and the ultraviolet curable sealant 5 is controlled by controlling the applied coating pressure.
  • the coating apparatus further includes two cylinders for adjusting and controlling the pressure applied to the first portion 11 and the second portion 12 in the drip nozzle, respectively.
  • a schematic diagram of the composition of the coating apparatus provided in this embodiment is shown in Fig. 6, which includes a drip nozzle 10 and two cylinders 20.
  • the two cylinders 20 are connected to the first portion 11 and the second portion 12, respectively, and control the coating pressures in the first portion 11 and the second portion 12, respectively.
  • the width of the ordinary sealant 4 and the ultraviolet curable sealant 5 is controlled by controlling the applied coating pressure.
  • the two portions 11 and 12 of the drip nozzle 10 are used for instilling the ordinary sealant 4, and which side is used for the ultraviolet curable sealant 5 according to the actual situation during use.
  • the embodiment of the invention further provides a display device comprising an array substrate, a counter substrate and a liquid crystal dripped between the array substrate and the opposite substrate.
  • the framed tape on the array substrate or the opposite substrate was coated by the method described in the above examples.
  • An example of a counter substrate is a color film substrate.
  • the coating device and the display device of the frame sealant provided by the embodiments of the invention can coat the sealant of different properties on different regions of the substrate, so as to reduce the contamination of the liquid crystal by the surrounding sealant and avoid affecting the afterimage performance. It can also ensure the adhesion between the sealant and the substrate, thereby improving the display quality of the liquid crystal panel.

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Life Sciences & Earth Sciences (AREA)
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Abstract

一种封框胶的涂布方法、设备以及显示装置。该封框胶的涂布方法包括：在基板（0）上显示区域的周围涂布紫外固化型封框胶（5），以及在紫外固化型封框胶（5）的外侧涂布普通封框胶（4）。该封框胶的涂布方法、设备以及显示装置通过在基板（0）上不同区域涂布不同性质的封框胶（4，5），既能减少液晶被周围的封框胶污染，还能保证封框胶和基板之间的粘结力，进而提高液晶面板的显示品质。

Description

封框胶的涂布方法、 设备以及显示装置 技术领域
本发明的实施例涉及一种封框胶的涂布方法、 设备以及显示装置。 背景技术
液晶显示装置（Liquid Crystal Display, 简称 LCD )具有轻薄短小、 低功 耗及低热量等优点， 使液晶显示装置被广泛用于如电视、 计算机、 平板电脑 以及移动电话等设备上。
液晶盒（cell )用封框胶是液晶显示装置制造过程中的关键材料之一。 目 前， 封框胶主要包含基体树脂（如环氧-丙烯酸树脂、 丙烯酸树脂、 环氧树脂 等） 、 固化剂 （如热固化剂、 光引发剂等） 、 填充物 （如无机填充物、 有机 填充物） 以及偶联剂等。 基体树脂的固化主要釆用紫外光固化和热固化两种 方式。 紫外固化速度快， 而热固化需要较高的温度和较长的时间。 为了保持 封框胶和基板之间具有较好的粘结性， 一般都在封框胶中加入偶联剂以提高 封框胶的粘结性。 目前， 封框胶一般先釆用紫外光预固化， 然后再釆用加热 进行最终的完全固化。
目前液晶滴注主要釆用滴下式液晶注入法（ One Drop Filling, ODF )方 式进行， 即先在阵列基板或彩膜基板上滴注液晶， 然后在另一基板（彩膜基 板或阵列基板）上涂布封框胶， 随后进行对盒工艺。 发明内容
本发明的实施例提供了一种封框胶的涂布方法、 设备以及显示装置， 以 避免靠近液晶的封框胶在固化阶段由于未完全固化对液晶产生污染， 从而提 高液晶显示面板的显示性能。
本发明的至少一个实施例提供了一种封框胶的涂布方法， 包含： 在基板 上显示区域的周围涂布紫外固化型封框胶， 以及在紫外固化型封框胶的外侧 涂布普通封框胶。
在一个实施例中， 所述紫外固化型封框胶的宽度为紫外固化型封框胶和 普通封框胶的总宽度的 1/5~1/2。
在一个实施例中， 所述紫外固化型封框胶中偶联剂的质量百分比为 0-2%, 所述普通封框胶中偶联剂的质量百分比为 2%~6%。
在一个实施例中， 所述紫外固化型封框胶和普通封框胶同时进行涂布； 或者先涂布内侧的紫外固化型封框胶， 再涂布外侧的普通封框胶； 或者先涂布外侧的普通封框胶， 再涂布内侧的紫外固化型封框胶。
本发明的另一个实施例还提供了一种封框胶的涂布设备， 所述设备包括 滴嘴， 所述滴嘴包括第一部分和第二部分， 两部分之间不相通， 分别用于滴 注紫外固化型封框胶和普通封框胶。
在一个实施例中， 所述涂布设备还包括一个气缸， 用于调节和控制施加 在滴嘴中的第一部分和第二部分的压力。
在一个实施例中， 所述涂布设备还包括两个气缸， 分别用于调节和控制 施加在滴嘴中的第一部分和第二部分的压力。
本发明的另一个实施例还提供了一种显示装置， 所述显示装置包括阵列 基板、 对置基板和滴注在阵列基板和对置基板中间的液晶， 所述阵列基板或 者对置基板上的封框胶釆用以上所述的方法进行涂布。 附图说明
为了更清楚地说明本发明实施例的技术方案， 下面将对实施例的附图作 简单地介绍，显而易见地，下面描述中的附图仅仅涉及本发明的一些实施例， 而非对本发明的限制。
图 1是一种涂布封框胶时使用的滴嘴结构的示意图；
图 2是一种封框胶在基板上的位置关系示意图；
图 3是釆用本发明实施例提供的一种封框胶的涂布方法涂布封框胶得到 的封框胶在基板上的位置关系示意图；
图 4 是本发明实施例提供的一种封框胶的涂布设备中滴嘴的结构示意 图；
图 5是本发明实施例提供的一种封框胶的涂布设备的组成示意图； 图 6是本发明实施例提供的另一种封框胶的涂布设备的组成示意图。 具体实施方式
为使本发明实施例的目的、 技术方案和优点更加清楚， 下面将结合本发 明实施例的附图， 对本发明实施例的技术方案进行清楚、 完整地描述。显然， 所描述的实施例是本发明的一部分实施例， 而不是全部的实施例。 基于所描 述的本发明的实施例， 本领域普通技术人员在无需创造性劳动的前提下所获 得的所有其他实施例， 都属于本发明保护的范围。
图 1为涂布封框胶使用的滴嘴结构示意图。 利用图 1中的滴嘴将封框胶 涂布在基板上， 涂布位置关系如图 2所示。 在图 2中， 液晶显示面板中的基 板 0 (例如彩膜基板 )上设置封框胶 1， 基板 0上的显示区域包括像素单元 2 和隔垫物 3。 在阵列基板上的显示区域滴注液晶， 经过阵列基板和彩膜基板 的对盒（cell-assemble )工艺后充满液晶的显示区域周边就是封框胶。 在对盒 完成后首先通过紫外光照射预固化封框胶， 然后再通过加热最终完全固化封 框胶。 如果面板的尺寸较小， 则在彩膜基板和阵列基板对盒完成后， 液晶基 本上就会扩散到整个显示区域并与或接近与未固化的封框胶接触。 虽然对盒 后的面板会很快经受紫外光照射进行封框胶预固化， 但预固化的封框胶未完 全固化且仍含有大量的小分子物质， 如热固化剂、 光引发剂、 无固化的树脂 以及偶联剂等物质。 在该情况下， 随后进行的热固化由于固化速率较慢、 时 间较长， 导致液晶长期与未完全固化的封框胶接触， 未完全固化封框胶中的 小分子物质就会进入液晶中而污染液晶。由于封框胶的固化对液晶造成污染， 因此影响了液晶显示面板的显示性能， 特别是影响了残像性能。
本发明的至少一个实施例提供了一种封框胶的涂布方法， 包含： 在基板 上显示区域的周围涂布紫外固化型封框胶， 以及在紫外固化型封框胶的外侧 涂布普通封框胶。
与仅仅涂布一种封框胶的方法相比， 上述涂布方法在内侧（靠近显示区 域的部分）使用固化速度较快的紫外固化型封框胶， 在外侧使用固化速度慢 但是粘结力好的普通封框胶。 这种封框胶涂布方式既能避免液晶被封框胶污 染， 还能保证基板和封框胶之间的粘结力， 从而整体上提高液晶面板的显示 口口 臾
图 3为利用上述涂布方法得到的封框胶在基板上的位置关系示意图。 图 3中，在基板 0上的显示区域中设置有像素单元 2和隔垫物 3，靠近显示区域 的内侧设置有紫外固化型封框胶 5， 而外侧设置普通封框胶 4。 例如，普通封 框胶 4釆用普通的紫外光和热固化型封框胶。
由于和液晶直接接触的封框胶釆用紫外固化型封框胶 5，在对盒完成后， 和液晶接触的紫外固化型封框胶 5可以迅速完成固化， 因此减少了未固化的 封框胶中的小分子物质 （例如， 热固化型树脂以及热引发剂等）对液晶的污 染。
为了保证封框胶和基板之间的粘合力， 例如封框胶中可加入偶联剂， 偶 联剂的质量百分比一般在 2%到 6%之间。 为了进一步减少偶联剂对液晶的污 染， 紫外固化型封框胶 5中可以少使用或不使用偶联剂。 在一个实施例中， 例如， 紫外固化型封框胶 5中偶联剂的质量百分比在 0%到 2%之间。
然而， 使用紫外固化型封框胶来代替例如环氧等热固化型树脂以及紫外 固化型封框胶 5中减少或不使用偶联剂， 会降低封框胶和基板 1之间的粘结 力。 因此， 为了保证封框胶与基板之间的粘结力， 在一个实施例中， 例如， 紫外固化型封框胶 5 的宽度为紫外固化型封框胶和普通封框胶的总宽度的 1/5~1/2。
在一个实施例中， 例如， 可以适当的增加普通封框胶 4中环氧类树脂以 及偶联剂的含量， 从而保证封框胶和基板之间总体的粘结力。 例如， 将普通 封框胶 4中环氧类树脂的含量由 20%-25%增加到 30%以上，将偶联剂的含量 从 2%-6%增加到 8%以上。
在一个实施例中， 例如， 紫外固化型封框胶封框胶 5和普通封框胶 4同 时进行涂布； 或者， 在一个实施例中， 先涂布内侧的紫外固化型封框胶 5， 再涂布外侧的普通封框胶 4; 或者， 在一个实施例中， 先涂布外侧的普通封 框胶 4， 再涂布内侧的紫外固化型封框胶 5。
分步骤涂布时， 首先在滴嘴中灌注一种封框胶， 釆用 ODF 方式进行涂 布， 该种封框胶涂布完成后再向滴嘴中灌注另一种封框胶， 也釆用 ODF 方 式进行涂布。
本发明至少一个实施例中提供的封框胶的涂布方法在基板上的显示区域 附近涂布紫外固化型封框胶， 在该紫外固化型封框胶外侧涂布普通封框胶。 该紫外固化型封框胶通过紫外固化就能实现完全固化， 固化速度较快， 减少 未完全固化的封框胶与液晶的接触时间， 而外侧的普通封框胶经过紫外固化 和热固化实现完全固化， 保证封框胶与基板之间的粘结力， 因此， 既能减少 液晶面板中液晶被周围的封框胶污染， 避免影响残像性能， 还能保证封框胶 和基板之间的粘结力， 进而提高液晶面板的显示品质。
本发明的至少一个实施例还提供了一种封框胶的涂布设备， 该设备包括 滴嘴， 其结构示意图如图 4所示。 滴嘴包括分别设置在左侧和右侧的第一部 分 11和第二部分 12， 两部分之间不相通， 分别用于滴注紫外固化型封框胶 和普通封框胶。
在一个实施例中， 例如， 涂布设备还包括一个气缸， 用于调节和控制施 加在滴嘴中第一部分 11和第二部分 12的压力。 本实施例中提供的涂布设备 的组成示意图如图 5所示， 该涂布设备包括滴嘴 10和一个气缸 20。 滴嘴 10 中第一部分 11和第二部分 12的涂布压力主要通过气缸 20进行控制。通过控 制施加的涂布压力， 实现控制普通封框胶 4和紫外固化型封框胶 5的宽度。
在一个实施例中， 例如， 涂布设备还包括两个气缸， 分别用于调节和控 制施加在滴嘴中第一部分 11和第二部分 12的压力。 本实施例中提供的涂布 设备的组成示意图如图 6所示， 该涂布设备包括滴嘴 10和两个气缸 20。 该 两个气缸 20分别连接至第一部分 11和第二部分 12，并分别控制第一部分 11 和第二部分 12中的涂布压力。通过控制施加的涂布压力， 实现控制普通封框 胶 4和紫外固化型封框胶 5的宽度。
需要说明的是，滴嘴 10中的两部分 11和 12哪一边用于滴注普通封框胶 4， 哪一边用于紫外固化型封框胶 5是根据使用过程中的实际情况设置的。
本发明实施例还提供了一种显示装置， 包括阵列基板、 对置基板和滴注 在阵列基板和对置基板中间的液晶。 阵列基板或者对置基板上的封框胶釆用 上述实施例所述的方法进行涂布。 对置基板的一个示例为彩膜基板。
本发明实施例提供的一种封框胶的涂布设备以及显示装置通过在基板上 不同区域涂布不同性质的封框胶， 使得既能减少液晶被周围的封框胶污染， 避免影响残像性能， 还能保证封框胶和基板之间的粘结力， 进而提高液晶面 板的显示品质。
以上实施方式仅用于说明本发明， 而并非对本发明的限制， 有关技术领 域的普通技术人员， 在不脱离本发明的精神和范围的情况下， 还可以做出各 种变化和变型， 因此所有等同的技术方案也属于本发明的范畴， 本发明的专 利保护范围应由权利要求限定。
本申请要求于 2014年 1月 20日递交的中国专利申请第 201410025571.0 号的优先权， 在此全文引用上述中国专利申请公开的内容以作为本申请的一 部分。

Claims

权利要求书
1、一种封框胶的涂布方法， 包含： 在基板上显示区域的周围涂布紫外固 化型封框胶， 以及在紫外固化型封框胶的外侧涂布普通封框胶。
2、如权利要求 1所述的涂布方法， 其中， 所述紫外固化型封框胶的宽度 为所述紫外固化型封框胶和所述普通封框胶的总宽度的 1/5~1/2。
3、如权利要求 1所述的涂布方法， 其中， 所述紫外固化型封框胶中偶联 剂的质量百分比为 0~2%，所述普通封框胶中偶联剂的质量百分比为 2%~6%。
4、如权利要求 1所述的涂布方法， 其中， 所述紫外固化型封框胶和普通 封框胶同时进行涂布；
或者先涂布内侧的紫外固化型封框胶， 再涂布外侧的普通封框胶； 或者先涂布外侧的普通封框胶， 再涂布内侧的紫外固化型封框胶。
5、 一种封框胶的涂布设备， 包括滴嘴， 其中， 所述滴嘴包括第一部分和 第二部分， 两部分之间不相通， 分别用于滴注紫外固化型封框胶和普通封框 胶。
6、如权利要求 5所述的涂布设备，还包括一个气缸， 用于调节和控制施 加在所述滴嘴中的第一部分和第二部分的压力。
7、如权利要求 5所述的涂布设备，还包括两个气缸， 分别用于调节和控 制施加在所述滴嘴中的第一部分和第二部分的压力。
8、 一种显示装置， 包括阵列基板、对置基板和在所述阵列基板和所述对 置基板中间的液晶，
其中， 所述阵列基板或者对置基板上的封框胶釆用权利要求 1-4中任一 项所述的方法进行涂布。
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