WO2014169586A1 - 液晶复合材料、包含其的显示面板和显示装置及显示面板制造方法 - Google Patents

液晶复合材料、包含其的显示面板和显示装置及显示面板制造方法 Download PDF

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WO2014169586A1
WO2014169586A1 PCT/CN2013/084622 CN2013084622W WO2014169586A1 WO 2014169586 A1 WO2014169586 A1 WO 2014169586A1 CN 2013084622 W CN2013084622 W CN 2013084622W WO 2014169586 A1 WO2014169586 A1 WO 2014169586A1
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Prior art keywords
liquid crystal
display panel
substrate
composite material
manufacturing
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English (en)
French (fr)
Inventor
郭仁炜
谢建云
车春城
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Beijing BOE Optoelectronics Technology Co Ltd
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Beijing BOE Optoelectronics Technology Co Ltd
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    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09KMATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K19/00Liquid crystal materials
    • C09K19/04Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09KMATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K19/00Liquid crystal materials
    • C09K19/52Liquid crystal materials characterised by components which are not liquid crystals, e.g. additives with special physical aspect: solvents, solid particles
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09KMATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K19/00Liquid crystal materials
    • C09K19/04Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit
    • C09K2019/0444Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit characterized by a linking chain between rings or ring systems, a bridging chain between extensive mesogenic moieties or an end chain group
    • C09K2019/0448Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit characterized by a linking chain between rings or ring systems, a bridging chain between extensive mesogenic moieties or an end chain group the end chain group being a polymerizable end group, e.g. -Sp-P or acrylate
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09KMATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K19/00Liquid crystal materials
    • C09K19/04Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit
    • C09K19/06Non-steroidal liquid crystal compounds
    • C09K19/08Non-steroidal liquid crystal compounds containing at least two non-condensed rings
    • C09K19/10Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings
    • C09K19/20Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings linked by a chain containing carbon and oxygen atoms as chain links, e.g. esters or ethers
    • C09K19/2007Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings linked by a chain containing carbon and oxygen atoms as chain links, e.g. esters or ethers the chain containing -COO- or -OCO- groups
    • C09K2019/2078Ph-COO-Ph-COO-Ph

Definitions

  • Embodiments of the present invention relate to a liquid crystal composite material, a display panel including the liquid crystal composite material, a display device including the display panel, and a display panel manufacturing method. Background technique
  • Nematic liquid crystals are commonly used in the liquid crystal display industry.
  • conventional display devices such as mobile phones and televisions use nematic liquid crystals.
  • the rigid portions of the nematic liquid crystals are arranged substantially parallel to each other, but their centroid positions are disordered, and a layered structure is not formed.
  • the liquid crystal can slide up and down, left and right, and back and forth, and remain parallel or nearly parallel only in the direction of the long axis of the liquid crystal.
  • the intermolecular interaction is weak. According to the position of the electric absorption group on the liquid crystal, it is divided into a positive liquid crystal and a negative liquid crystal.
  • the working principle of the nematic liquid crystal in the display device is as follows: Due to the characteristics of the liquid crystal itself, under the action of the electric field, the liquid crystal absorption group is attracted by the electric field, and the molecules rotate, so that the light can pass through the nematic liquid crystal and perform With a certain deflection, the deflected light can be displayed through the upper polarizer.
  • a disadvantage of the prior art is that the liquid crystal display panel using the nematic liquid crystal has a relatively slow response after being energized, thereby causing a relatively long reaction time of the display device.
  • the embodiment of the invention provides a liquid crystal composite material, comprising: a liquid crystal and a polymer network anchoring liquid crystal, wherein the polymer network is polymerized by an ultraviolet polymerizable monomer having the following structure:
  • n 2, 3, 4, 5, 6, 7, or 8.
  • the embodiment of the invention further provides a display panel comprising a first substrate and a second substrate disposed opposite to each other, wherein the liquid crystal composite material is disposed between the opposite first substrate and the second substrate.
  • the display panel is a full transmissive display panel.
  • the display panel is a transflective display panel.
  • the embodiment of the invention further provides a method for manufacturing a display panel, comprising the steps of: 90-98% by weight of liquid crystal, 0.1 ⁇ 1% of photoinitiator and 1 ⁇ 9% of UV polymerizable monomer;
  • the liquid crystal mixture is obtained by mixing in the dark, wherein the chemical formula of the ultraviolet polymerizable monomer is:
  • n 2, 3, 4, 5, 6, 7, or 8;
  • the liquid crystal mixture subjected to light-shielding mixing is dropped onto the first substrate and vacuum-aligned; the display panel behind the cassette is irradiated with ultraviolet rays to polymerize the ultraviolet polymerizable monomer to form a polymer network;
  • the display panel after the ultraviolet irradiation is subjected to heat treatment.
  • the ultraviolet ray may have an ultraviolet ray intensity of 1 to 100 mW/cm 2 and an irradiation time of 5 to 60 minutes.
  • the heating temperature when the display panel is subjected to heat treatment is 100 ° C to 120 ° C.
  • the heating temperature is 110 °C.
  • the method further comprises: placing the liquid crystal mixture in a defoamer for defoaming, and the defoaming time is 1 to 3 hours.
  • Embodiments of the present invention also provide a display device including the display panel as described above.
  • FIG. 1 is a schematic structural diagram of a display panel according to an embodiment of the present invention.
  • FIG. 2 is a structural view of a polymer network observed under a scanning electron microscope according to an embodiment of the present invention
  • FIG. 3 is a comparison diagram of response time of a liquid crystal composite material containing a polymer network and an existing liquid crystal according to an embodiment of the present invention, wherein 13 represents a response time curve of a display panel to which the polymer network-containing liquid crystal composite material of the embodiment of the invention is added, and 12 represents a response time curve of the display panel including the existing liquid crystal;
  • FIG. 4 is a schematic structural diagram of a full-transmission liquid crystal display panel according to an embodiment of the present invention
  • FIG. 5 is a schematic diagram of an operation state of a transflective liquid crystal display panel according to an embodiment of the present invention.
  • the embodiment of the invention provides a liquid crystal composite material, a display panel including the liquid crystal composite material, a display device including the display panel, and a display panel manufacturing method.
  • a polymer network to anchor the liquid crystal, the response speed of the display panel is improved, and the reaction time of the display device is shortened.
  • FIG. 1 is a schematic structural diagram of a display panel according to an embodiment of the present invention
  • FIG. 2 is a structural diagram of a polymer network observed under a scanning electron microscope according to an embodiment of the present invention.
  • the embodiment of the invention provides a liquid crystal composite material, comprising: a liquid crystal and a polymer network 7 anchoring liquid crystal, wherein the polymer network 7 is polymerized by an ultraviolet polymerizable monomer having the following structure:
  • n 2, 3, 4, 5, 6, 7, or 8.
  • the polymer network 7 can anchor the liquid crystal, thereby aligning the liquid crystals into a layered structure, and defining The liquid crystal slides up and down, left and right, and front and rear. Therefore, after the liquid crystal display panel having the polymer network is energized, the liquid crystal can be rapidly rotated to a desired angle by the electric field, thereby improving the response speed of the liquid crystal display panel, as shown in FIG.
  • FIG. 3 is a comparison diagram of response time of a liquid crystal composite material with a polymer network added to a conventional liquid crystal according to an embodiment of the present invention, wherein the horizontal axis is the response time, and the vertical axis is the transmittance of the liquid crystal, that is, the display panel is turned on and off.
  • the light transmittance of the liquid crystal layer 6 shown in Fig. 1 changes.
  • FIG. 3 the variation of the response curve 12 of the liquid crystal in the prior art and the response curve 13 of the liquid crystal composite provided by the embodiment of the present invention is apparent.
  • the transmittance of the liquid crystal composite material provided by the embodiment of the present invention is changed by using the test cell, and the response time is 30 ms, and the response time of the polymerized monomer is not used. The time is around 50ms. Therefore, the liquid crystal composite material provided by the embodiment of the invention can significantly shorten the response time of the display device.
  • An embodiment of the present invention provides a display panel including a first substrate and a second substrate disposed opposite to each other, and the liquid crystal composite material is disposed between the first substrate and the second substrate disposed opposite to each other.
  • the first substrate is a color film substrate
  • the second substrate is an array substrate
  • the first substrate is an array substrate
  • the second substrate is a color film substrate.
  • the display panel provided by the embodiment of the present invention may be a display panel of different structure, including, for example, a full-transmissive display panel or a transflective display panel.
  • Embodiments of the present invention provide a method for manufacturing a display panel, including the following steps:
  • n 2, 3, 4, 5, 6, 7, or 8;
  • the liquid crystal display panel behind the box is irradiated with ultraviolet rays to polymerize the ultraviolet polymerizable monomer to form a polymer network;
  • the liquid crystal display panel after the ultraviolet irradiation is subjected to heat treatment.
  • the liquid crystal display panel after the box can be irradiated with ultraviolet rays having an intensity of 1 to 100 mW/cm 2 for an irradiation time of 5 to 60 minutes to polymerize the ultraviolet polymerizable monomer to form a polymer network.
  • the liquid crystal display panel after ultraviolet irradiation can be subjected to heat sealing treatment, heating temperature It is from 100 ° C to 120 ° C.
  • the heating temperature is 110 °C.
  • the liquid crystal mixture is dropped onto the first substrate, the liquid crystal mixture is further placed in a defoamer for defoaming treatment, and the defoaming time may be 1 to 3 hours.
  • a defoamer for defoaming treatment for example, benzoin anisole.
  • the embodiment of the present invention further provides a display device, including the above display panel, the display device may be: a liquid crystal panel, an electronic paper, an OLED (Organic Light Emitting Diode) panel, a mobile phone, a tablet computer, Any product or component that has a display function, such as a television, monitor, laptop, digital photo frame, navigator, etc.
  • a display device including the above display panel
  • the display device may be: a liquid crystal panel, an electronic paper, an OLED (Organic Light Emitting Diode) panel, a mobile phone, a tablet computer, Any product or component that has a display function, such as a television, monitor, laptop, digital photo frame, navigator, etc.
  • Embodiment 1 is a diagrammatic representation of Embodiment 1:
  • the display panel is a full-transparent liquid crystal display panel
  • the full-transparent liquid crystal display panel includes: an array substrate 9 and a color filter substrate 2 disposed between the array substrate 9 and the color filter substrate 2.
  • the liquid crystal layer 6 and the upper polarizer 1 attached to the surface of the liquid crystal layer 6 facing the liquid crystal layer 6 and the lower polarizer 11 attached to the surface of the array substrate 9 facing the liquid crystal layer 6 are attached.
  • the full transmissive liquid crystal display panel further includes: a first parallel alignment layer 5 disposed on the surface of the color filter substrate 2 facing the liquid crystal layer 6 and a second parallel orientation disposed on the surface of the array substrate 9 facing the liquid crystal layer 6 Layer 8.
  • the polymer network 7 can anchor the liquid crystal in the full-transparent liquid crystal display panel to restrict the sliding of the liquid crystal, thereby allowing the liquid crystals to be arranged in a layer.
  • the full-transmission liquid crystal display panel is energized, the liquid crystal can be rotated rapidly under the action of the electric field force, thereby improving the response speed of the liquid crystal.
  • the liquid crystal display panel is powered off, in order to allow the liquid crystal to quickly return to the initial position, the liquid crystal is deflected by the first parallel alignment layer 5 and the second parallel alignment layer 8, and returns to the initial state.
  • Step 1 forming a first parallel alignment layer on the color filter substrate
  • Step 2 forming a second parallel alignment layer on the array substrate
  • Step 3 90 ⁇ 98% by weight (for example: 90%, 92%, 94%, 98%) of liquid crystal, 0.1-1% (for example: 0.1%, 0.4%, 0.5%, 0.8%, 1%) of UV polymerizable monomers and 1 to 9% (for example: 1%, 4.5%, 6%, 9%) of light
  • the initiator is mixed in the dark to obtain a liquid crystal mixture
  • Step 4 the liquid crystal mixture is placed in a defoamer for defoaming, and the defoaming time may be 1 to 3 hours (for example: 1 hour, 2 hours, 3 hours) ) ;
  • Step 5 dropping the liquid crystal mixture after the defoaming treatment onto the array substrate or the color film substrate; Step 6. Applying the sealing frame glue to the color filter substrate;
  • Step 7 performing vacuum box on the array substrate and the color filter substrate
  • Step 8 Perform ultraviolet irradiation, the ultraviolet intensity may be 1 ⁇ 100 W/cm 2 (for example: 1 W/cm 2 , 50 W/cm 2 , lOO W/cm 2 ), and the irradiation time may be 5 to 60 minutes (for example) : 5 minutes, 22.5 minutes, 60 minutes);
  • Step 9 The ultraviolet light-irradiated liquid crystal display panel is subjected to a heat sealing frame treatment, and the heating temperature may be 100 ° C to 120 ° C (for example, 100 ° C, 110 ° C, 120 ° C).
  • the liquid crystal composite material can be prepared according to different composition ratios, and the liquid crystal layer formed for different composition ratios is subjected to on-and-off electrical response.
  • a response time of a liquid crystal layer formed by mixing 90% of liquid crystal, 1% of an ultraviolet polymerizable monomer, and 9% of a photoinitiator is 25 ms; 94% of liquid crystal, 0.5% of UV polymerizable monomer, and 5.5%
  • the response time of the liquid crystal layer formed by mixing the photoinitiators is 30 ms; the response time of the liquid crystal layer formed by mixing 98% of the liquid crystal, 1% of the ultraviolet polymerizable monomer and 1% of the photoinitiator is 35 ms.
  • the ultraviolet polymerizable monomer and photoinitiator used in each of the above liquid crystal composite materials are selected from those described above.
  • the number of n in the ultraviolet polymerizable monomer has little effect on the response time, and the difference in response time mainly depends on the proportion of the polymerizable monomer.
  • Embodiment 2 is a diagrammatic representation of Embodiment 1:
  • the liquid crystal display panel in this embodiment is a transflective liquid crystal display panel, and the transflective liquid crystal display panel can be applied to an ADS (ADvanced Super Dimension Switch, advanced super-dimensional field conversion technology, ADS) mode.
  • ADS Advanced Super Dimension Switch, advanced super-dimensional field conversion technology
  • the display modes such as TN (Twisted Nematic) mode, VA (Vertical Alignment) mode, IPS (In-Plane-Switching) mode, the above display modes can make the display panel faster. The speed of response.
  • TN Transmission Nematic
  • VA Very Alignment
  • IPS In-Plane-Switching
  • the transflective liquid crystal display panel comprises: an array substrate 9 and a color filter substrate 2, a liquid crystal layer 6 disposed between the array substrate 9 and the color filter substrate 2, and attached to the back of the color filter substrate 2.
  • the upper polarizer 1 facing the liquid crystal layer 6 and the lower side of the array substrate 9 facing away from the liquid crystal layer 6
  • the light sheet 11 and the first parallel alignment layer 5 disposed on the surface of the color filter substrate 2 facing the liquid crystal layer 6 and the second parallel alignment layer 8 disposed on the surface of the array substrate 9 facing the liquid crystal layer 6.
  • the liquid crystal layer 6 can be made of the liquid crystal composite material.
  • the liquid crystal layer 6 is divided into a transmissive area and a reflective area, wherein the thickness of the liquid crystal layer 6 located in the transmissive area is twice the thickness of the liquid crystal layer 6 of the reflective area.
  • the transflective liquid crystal display panel further includes: an optical retardation layer 3 disposed between the color filter substrate 2 and the first parallel alignment layer 5, and a resin layer disposed on the optical retardation layer 3 4, the resin layer 4 and the optical retardation layer 3 are located above the reflective region liquid crystal layer 6 and the thickness of the resin layer 4 is the same as the thickness of the reflective region liquid crystal layer 6; located under the liquid crystal layer 6 of the reflective region
  • the reflective layer 10 is disposed, and the reflective layer is fixedly disposed on the array substrate 9.
  • the reflective layer 10 is a metal reflective layer.
  • the liquid crystal composite material may be formed by mixing a polymer network 7 and a liquid crystal,
  • Step 1 depositing a light retardation layer on the color filter substrate
  • Step two depositing a resin layer on the optical retardation layer
  • Step three forming a first parallel alignment layer on the color filter substrate and the optical retardation layer;
  • Step 4 fixing a metal reflective layer on the array substrate
  • Step 5 forming a second parallel alignment layer on the array substrate
  • Step 6 90 ⁇ 98% by weight (for example: 90%, 92%, 94%, 98%) of liquid crystal, 0.1-1% (for example: 0.1%, 0.4%, 0.5%, 0.8%, 1%)
  • the ultraviolet polymerizable monomer and 1 to 9% (for example, 1%, 4.5%, 6%, 9%) of the photoinitiator are mixed in the dark to obtain a liquid crystal mixture;
  • Step VII the liquid crystal mixture is placed
  • Defoaming treatment in the defoamer the defoaming time can be 1 to 3 hours (for example: 1 hour, 2 hours, 3 hours);
  • Step VIII the defoaming liquid crystal mixture is added to the array substrate or the color film substrate;
  • Step IX the frame sealing glue is added to the color film substrate;
  • Step ten performing vacuum box on the array substrate and the color filter substrate
  • Step 11 UV irradiation
  • the ultraviolet intensity may be 1 ⁇ 100 W/cm 2 (for example: 1 W/cm 2 , 50 W/cm 2 , 100 W/cm 2 ), and the irradiation time may be 5 to 60 minutes ( For example: 5 minutes, 22.5 minutes, 60 minutes);
  • Step 12 The ultraviolet light-irradiated liquid crystal display panel is subjected to a heat sealing frame treatment, and the heating temperature may be 100 ° C to 120 ° C (for example, 100 ° C, 110 ° C, 120 ° C).
  • the liquid crystal composite material can be prepared according to different composition ratios, and the liquid crystal layer formed for different composition ratios is subjected to on-and-off electrical response.
  • the response time of the liquid crystal layer formed by mixing 90% of liquid crystal, 1% of UV polymerizable monomer and 9% of photoinitiator is 25ms; 94% of liquid crystal, 0.5% of UV polymerizable monomer and 5.5% of light
  • the response time of the liquid crystal layer formed by mixing the initiator was 30 ms; the response time of the liquid crystal layer formed by mixing 98% of the liquid crystal, 1% of the ultraviolet polymerizable monomer and 1% of the photoinitiator was 35 ms.
  • the ultraviolet polymerizable monomer and photoinitiator used in each of the above liquid crystal composite materials are selected from those described above.
  • the number of n in the ultraviolet polymerizable monomer has little effect on the response time, and the difference in response time mainly depends on the proportion of the polymerizable monomer.
  • the incident light in the reflective region passes through the liquid crystal layer 6 of the reflective region twice, since the liquid crystal layer 6 of the reflective region is half of the liquid crystal layer 6 of the incident region, The direction of the light deflection of the reflection area is consistent with the deflection direction of the light in the incident area.
  • both the reflection area and the transmission area are dark fields.
  • FIG. 5 it is a schematic diagram of the working state of the transflective liquid crystal display panel provided by the embodiment of the present invention. Since the polymer network 7 can anchor the liquid crystal in the transflective liquid crystal display panel, the liquid crystal is restricted. Sliding, so that the liquid crystals can be arranged in a layer shape. When the transflective liquid crystal display panel is energized, the liquid crystal can be rotated rapidly under the action of the electric field force, thereby improving the response speed of the transflective liquid crystal display panel. After the transflective liquid crystal display panel is powered off, in order to enable the liquid crystal to quickly return to the initial position, under the action of the first parallel alignment layer 5 and the second parallel alignment layer 8, the liquid crystal is deflected and returned to the initial state. .
  • a polymer network capable of anchoring the liquid crystal can be formed in the liquid crystal layer of the display panel, and the polymer network can restrict the sliding of the liquid crystal.
  • the liquid crystals are arranged in layers. After the display panel including the liquid crystal composite material is powered, the liquid crystal therein can be rotated rapidly, thereby improving the response speed of the display panel and shortening the reaction time of the display device.
  • FIG. 3 is a view showing a comparison of response time of a display panel incorporating a liquid crystal composite material containing a polymer network and an existing liquid crystal, wherein the horizontal axis is the response time and the vertical axis is the transmittance of the liquid crystal, that is, the display panel.
  • the light transmittance of the liquid crystal layer 6 shown in Fig. 1 changes when the power is turned off.
  • the liquid crystal composite material consists of 89% liquid crystal, 10% polymerized monomer (1,4-bis(4-(6,-propenyloxyhexyloxy)benzoyloxy)-2-toluene) and 1% Photoinitiator (benzoin anisole, polymerized by Beijing Chemical Reagent Co., Ltd.).
  • the display panel used is a transflective trans display panel.
  • FIG. 3 the variation of the response curve 12 of the liquid crystal in the prior art and the response curve 13 of the liquid crystal composite provided by the embodiment of the present invention is apparent.
  • the transmittance of the liquid crystal composite material provided by the embodiment of the present invention is changed by using the test cell, and the response time is 30 ms, and the response time of the non-polymerized monomer is about 50 ms. Therefore, the liquid crystal composite material provided by the embodiment of the invention can significantly shorten the response time of the display device.
  • the spirit and scope of the invention Thus, it is intended that the present invention cover the modifications and the modifications of the invention

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Abstract

公开了一种液晶复合材料、含该液晶复合材料的显示面板和显示装置及显示面板制造方法。所述液晶复合材料包括:液晶以及锚定液晶的高分子网络,所述高分子网络由具有下式结构的紫外可聚合单体聚合而成,如(式I);其中, n=2、3、4、5、6、7或8。通过在显示面板的液晶层内加入高分子网络来锚定液晶,提高了液晶显示面板通电后的响应速度,进而缩短了显示装置的反应时间。

Description

液晶复合材料、 包含其的显示面板
和显示装置及显示面板制造方法 技术领域
本发明的实施例涉及一种液晶复合材料、含该液晶复合材料的显示面板、 含该显示面板的显示装置及显示面板制造方法。 背景技术
在液晶显示行业中普遍采用向列相液晶, 如: 手机、 电视等常用的显示 装置使用的都是向列相液晶。 向列相液晶刚性部分之间基本相互平行排列, 但是其质心位置无序, 不形成层状结构, 液晶能上下、 左右、 前后滑动, 只 在液晶长轴方向上保持相互平行或近于平行, 分子间相互作用 弱。 根据液 晶上吸电基团位置的不同, 分为正性液晶和负性液晶。 向列相液晶在显示装 置内的工作原理为: 由于液晶自身的特性, 在电场作用下, 液晶吸电基团受 到电场吸引, 分子会发生转动, 从而使光能够穿过向列相液晶并进行一定的 偏转, 偏转后的光线能够透过上偏光片进行显示。
现有技术的缺陷在于: 采用向列相液晶的液晶显示面板在通电后响应比 较慢, 从而造成显示装置的反应时间比较长。 发明内容
本发明实施例提供一种液晶复合材料, 包括: 液晶以及锚定液晶的高分 子网络, 所述高分子网络由具有下式结构的紫外可聚合单体聚合而成:
Figure imgf000003_0001
; 其中, n=2、 3、 4、 5、 6、 7或 8。
本发明实施例还提供了一种显示面板, 包括相对设置的第一基板和第二 基板,所述相对设置的第一基板和第二基板之间设置有上述的液晶复合材料。
例如, 所述显示面板为全透式显示面板。
例如, 所述显示面板为半透半反式显示面板。 本发明实施例还提供了一种显示面板的制造方法, 包括以下步骤: 将按重量计 90~98%的液晶、 0.1~1%的光引发剂和 1~9%的紫外可聚合单 体进行避光混合, 得到液晶混合物, 其中, 紫外可聚合单体的化学式为:
Figure imgf000004_0001
, 其中, n=2、 3、 4、 5、 6、 7或 8;
将进行避光混合的液晶混合物滴加到第一基板上并进行真空对盒; 将对盒后的显示面板进行紫外线照射, 使紫外可聚合单体聚合反应生成 高分子网络;
将紫外线照射后的显示面板进行加热处理。
例如, 所述紫外线照射的紫外线强度可为 l~100mW/cm2, 照射时间可为 5-60分钟。
例如, 显示面板进行加热处理时的加热温度为 100°C~120°C。
例如, 所述加热温度为 110°C。
例如, 在将避光混合的液晶混合物滴加到第一基板之前, 还包括: 将该液晶混合物放置到脱泡器中进行脱泡处理,其脱泡时间为 1~3小时。 本发明实施例还提供一种显示装置, 其包括如上所述的显示面板。 附图说明
为了更清楚地说明本发明实施例中的技术方案, 下面将对实施例 中所需要使用的附图作筒单地介绍, 显而易见地, 下面描述中的附图 仅仅是本发明的一些实施例, 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为本发明实施例提供的显示面板的结构示意图;
图 2为本发明实施例提供的扫描电镜下观察到的高分子网络结构图; 图 3为添加了本发明实施例的含高分子网络的液晶复合材料与现有液晶 的响应时间对比图,其中 13代表添加了本发明实施例的含高分子网络的液晶 复合材料的显示面板的响应时间曲线, 12代表含现有液晶的显示面板的响应 时间曲线;
图 4为本发明实施例提供的全透式液晶显示面板的结构示意图; 图 5 为本发明实施例提供的半透半反式液晶显示面板的工作状态示意 图。 具体实施方式
为了提高显示面板通电后的响应速度, 进而缩短显示装置的反应时间, 本发明实施例提供了一种液晶复合材料、 含该液晶复合材料的显示面板、 含 该显示面板的显示装置及显示面板制造方法。 通过采用高分子网络将液晶进 行锚定, 提高了显示面板的响应速度, 进而缩短了显示装置的反应时间。 为 使本发明的目的、 技术方案和优点更加清楚, 以下举实施例对本发明作进一 步详细说明。 显然, 所描述的实施例仅仅是本发明一部分实施例, 而不是全 部的实施例。 基于本发明中的实施例, 本领域普通技术人员在没有做出创造 性劳动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。
如图 1和图 2所示,图 1为本发明实施例提供的显示面板的结构示意图; 图 2为本发明实施例提供的扫描电镜下观察到的高分子网络结构图。
本发明实施例提供一种液晶复合材料, 包括: 液晶以及锚定液晶的高分 子网络 7 ,所述高分子网络 7通过具有下式结构的紫外可聚合单体聚合而成:
Figure imgf000005_0001
; 其中, n=2、 3、 4、 5、 6、 7或 8。
在上述实施例中, 由于形成高分子网络 7的紫外可聚合单体具有一定的 液晶性, 因此, 高分子网络 7可以将液晶进行锚定, 从而使液晶能够排列成 层状结构, 并且限定了液晶在上下、 左右、 前后方向的滑动。 因此, 在具有 高分子网络的液晶显示面板在通电后, 液晶能够在电场的作用下快速的发生 转动到需要的角度, 从而提高了该液晶显示面板的响应速度, 如图 3所示。 图 3为本发明实施例中添加高分子网络的液晶复合材料与现有液晶的响应时 间对比图, 其中, 横轴为响应时间, 纵轴为液晶的透过率, 即显示面板在通 断电时, 图 1中所示的液晶层 6的光透过率变化。 在图 3中, 可明显看出现 有技术中的液晶的响应曲线 12 与本发明实施例提供的液晶复合材料的响应 曲线 13的变化差距。通过使用测试 cell进行测试,本发明实施例提供的液晶 复合材料透过率发生变化,其响应时间为 30ms, 而未使用聚合单体的响应时 间在 50ms左右。 因此, 本发明实施例提供的液晶复合材料可以明显缩短显 示装置的响应时间。
在上述实施例中, 形成高分子网络 7的紫外可聚合单体可以为同系列的 不同的物质, 生产者可以根据实际情况选择不同的紫外可聚合单体, 如 n=3 时, 紫外可聚合单体为 1,4-双(4- ( 6,-丙烯酰氧基丙氧基)苯甲酰氧基) -2- 甲苯; n=4时, 紫外可聚合单体为 1,4-双(4- ( 6,-丙烯酰氧基丁氧基)苯甲 酰氧基) -2-甲苯; n=5时, 紫外可聚合单体为 1,4-双(4- ( 6,-丙烯酰氧基戊 苯甲酰 « -2-甲苯等来聚合生成高分子网络 7, 其中, n越小时柔 性链越短, 刚性较强, 液晶受到的锚定力较强。 n越长时柔性链越长, 刚性 相对降低, 液晶受到的锚定力相对较弱。
本发明实施例提供了一种显示面板, 包括相对设置的第一基板和第二基 板, 所述相对设置的第一基板和第二基板之间设置有上述的液晶复合材料。 其中, 所述第一基板为彩膜基板, 第二基板为阵列基板, 或第一基板为阵列 基板, 第二基板为彩膜基板。
本发明实施例提供的显示面板可以为不同结构的显示面板, 其包括例如 全透式显示面板或半透半反式显示面板。
本发明实施例提供一种显示面板的制造方法, 包括以下步骤:
将按重量计 90~98%的液晶、 0.1~1%的光引发剂和 1~9%的紫外可聚合单 体进
Figure imgf000006_0001
, 其中, n=2、 3、 4、 5、 6、 7或 8;
将所述液晶混合物滴加到第一基板上并进行真空对盒;
将对盒后的液晶显示面板进行紫外线照射, 使紫外可聚合单体聚合反应 生成高分子网络;
将紫外线照射后的液晶显示面板进行加热处理。
例如, 可将对盒后的液晶显示面板在强度为 l~100mW/cm2的紫外线进 行照射, 照射时间为 5~60分钟, 使紫外可聚合单体聚合反应生成高分子网 络。
例如, 可将紫外线照射后的液晶显示面板进行加热封框处理, 加热温度 为 100°C~120°C。 例如, 所述加热温度为 110°C。
例如, 在所述液晶混合物滴加到第一基板之前, 还包括将液晶混合物放 置到脱泡器中进行脱泡处理, 脱泡时间可为 1~3小时。 包括但不限于安息香苯甲醚。
本发明实施例还提供了一种显示装置, 包括上述显示面板, 所述显示装 置可以为: 液晶面板、 电子纸、 OLED ( Organic Light Emitting Diode, 有机 发光二级管) 面板、 手机、 平板电脑、 电视机、 显示器、 笔记本电脑、 数码 相框、 导航仪等任何具有显示功能的产品或部件。
为了更好地说明上述液晶复合材料、 含有其的显示面板和显示装置, 下 面以几个具体实施例进行详细说明。 应理解, 所述实施例仅仅是说明性的, 无意限定本发明的范围。
实施例一:
如图 4所示, 显示面板为全透式液晶显示面板, 所述全透式液晶显示面 板包括: 对盒的阵列基板 9和彩膜基板 2, 设置于阵列基板 9和彩膜基板 2 之间的液晶层 6, 以及贴附在彩膜基板 2背向液晶层 6—面的上偏光片 1和 贴附在阵列基板 9背向液晶层 6—面的下偏光片 11。所述全透式液晶显示面 板还包括: 设置在所述彩膜基板 2面向液晶层 6—面的第一平行取向层 5和 设置在阵列基板面 9面向液晶层 6—面的第二平行取向层 8。 其中, 所述液 晶层 6可以由所述液晶复合材料制得, 形成所述液晶复合材料的高分子网络 7的单体可为上述紫外可聚合单体中 n=2、 3、 4、 5、 6、 7、 8的任一种。 该 高分子网络 7可以将全透式液晶显示面板内的液晶锚定, 限制液晶的滑动, 从而使液晶能够排列成层状。 当全透式液晶显示面板通电后, 液晶能够在电 场力的作用下快速地转动,提高了液晶的响应速度。 当液晶显示面板断电后, 为了使液晶能够快速地回到初始位置, 在第一平行取向层 5和第二平行取向 层 8的作用下, 液晶发生偏转, 回到初始状态。
该实施例所示的液晶显示面板可如下制备:
步骤一、 在彩膜基板上形成第一平行取向层;
步骤二、 在阵列基板上形成第二平行取向层;
步骤三、 将按重量计 90~98% (例如: 90%、 92%、 94%、 98% )的液晶、 0.1-1% (例如: 0.1%、 0.4%、 0.5%、 0.8%、 1% )的紫外可聚合单体和 1~9% (例如: 1%、 4.5%、 6%、 9% )的光引发剂进行避光混合, 得到液晶混合物; 步骤四、 将所述液晶混合物放入脱泡器中进行脱泡处理, 脱泡时间可为 1~3小时(例如: 1小时、 2小时、 3小时) ;
步骤五、 将脱泡处理后的液晶混合物滴加到阵列基板或彩膜基板上; 步骤六、 将封框胶滴加到彩膜基板上;
步骤七、 将阵列基板和彩膜基板进行真空对盒;
步骤八、进行紫外线照射,紫外线强度可为 1~100 W/cm2(例如: 1 W/cm2、 50 W/cm2、 lOO W/cm2 ), 照射时间可为 5~60分钟(例如: 5分钟、 22.5分钟、 60分钟) ;
步骤九、 将经紫外线照射的液晶显示面板进行加热封框处理, 加热温度 可为 100°C~120°C (例如: 100°C、 110°C、 120 °C ) 。
在实际生产过程中, 液晶复合材料可以按不同的成分比例来制备, 针对 不同成分比例形成的液晶层进行通断电响应。 例如, 90%的液晶、 1%的紫外 可聚合单体和 9%的光引发剂混合后生成的液晶层的响应时间为 25ms; 94% 的液晶、0.5%的紫外可聚合单体和 5.5%的光引发剂混合后生成的液晶层的响 应时间为 30ms; 98%的液晶、 1%的紫外可聚合单体和 1%的光引发剂混合后 生成的液晶层的响应时间为 35ms。上述各液晶复合材料中所用的紫外可聚合 单体和光引发剂选自上述那些。 紫外可聚合单体中 n的数目对响应时间的影 响甚微, 响应时间的不同主要取决于可聚合单体的比例。
实施例二:
该实施例中的液晶显示面板为半透半反式液晶显示面板, 该半透半反式 液晶显示面板可以应用于 ADS ( ADvanced Super Dimension Switch, 高级超 维场转换技术, 筒称 ADS )模式、 TN ( Twisted Nematic, 扭曲向列 )模式、 VA ( Vertical Alignment, 垂直取向)模式、 IPS ( In-Plane-Switching , 平面方 向转换)模式等显示模式中, 以上显示模式均能使显示面板具有较快的响应 速度。 下面仅以 ADS显示模式下的半透半反式液晶显示面板为例进行说明。
所述半透半反式液晶显示面板包括: 对盒的阵列基板 9和彩膜基板 2, 设置于阵列基板 9和彩膜基板 2之间的液晶层 6, 以及贴附在彩膜基板 2背 向液晶层 6—面的上偏光片 1和贴附在阵列基板 9背向液晶层 6—面的下偏 光片 11 , 以及设置在所述彩膜基板 2面向液晶层 6—面的第一平行取向层 5 和设置在阵列基板面 9面向液晶层 6—面的第二平行取向层 8。 其中, 所述 液晶层 6可以由所述液晶复合材料制得。所述液晶层 6分为透射区和反射区, 其中位于透射区的液晶层 6厚度为反射区液晶层 6厚度的 2倍。 所述半透半 反式液晶显示面板还包括: 设置于所述彩膜基板 2和所述第一平行取向层 5 之间的光延迟层 3以及设置在所述光延迟层 3上的树脂层 4, 所述树脂层 4 和光延迟层 3位于所述反射区液晶层 6的上方且树脂层 4的厚度与所述反射 区液晶层 6的厚度相同; 位于所述反射区液晶层 6的下方的反射层 10, 且所 述反射层固定设置在所述阵列基板 9上。例如,所述反射层 10为金属反射层。 且上偏光片 1和下偏光片 11 的透过轴相互垂直, 分别在第一平行取向层 5 位于光延迟层 3朝向反射区液晶层 6的一面上以及彩膜基板 2朝向透射区液 晶层 6—面上; 所述液晶复合材料可以由高分子网络 7与液晶混合形成, 其
7、 8的任一种。
该实施例所示的液晶显示面板可如下制备:
步骤一、 在彩膜基板上沉积形成光延迟层;
步骤二、 在光延迟层上沉积树脂层;
步骤三、 在彩膜基板和光延迟层上形成第一平行取向层;
步骤四、 在阵列基板上固定金属反射层;
步骤五、 在阵列基板上形成第二平行取向层;
步骤六、 将按重量计 90~98% (例如: 90%、 92%、 94%、 98% )的液晶、 0.1-1% (例如: 0.1%、 0.4%、 0.5%、 0.8%、 1% )的紫外可聚合单体和 1~9% (例如: 1%、 4.5%、 6%、 9% )的光引发剂进行避光混合, 得到液晶混合物; 步骤七、 将所述液晶混合物放入脱泡器中进行脱泡处理, 其脱泡时间可 为 1~3小时(例如: 1小时、 2小时、 3小时) ;
步骤八、 将脱泡处理后的液晶混合物滴加到阵列基板或彩膜基板上; 步骤九、 将封框胶滴加到彩膜基板上;
步骤十、 将阵列基板和彩膜基板进行真空对盒;
步骤十一、 进行紫外线照射, 紫外线强度可为 1~100 W/cm2 (例如: 1 W/cm2, 50 W/cm2, 100 W/cm2 ), 照射时间可为 5~60分钟(例如: 5分钟、 22.5分钟、 60分钟) ;
步骤十二、 将经紫外线照射的液晶显示面板进行加热封框处理, 加热温 度可为 100°C~120°C (例如: 100°C、 110°C、 120°C ) 。
在实际生产过程中, 液晶复合材料可以按不同的成分比例来制备, 针对 不同成分比例形成的液晶层进行通断电响应。 90%的液晶、 1%的紫外可聚合 单体和 9%的光引发剂混合后生成的液晶层的响应时间为 25ms; 94%的液晶、 0.5%的紫外可聚合单体和 5.5%的光引发剂混合后生成的液晶层的响应时间 为 30ms; 98%的液晶、 1%的紫外可聚合单体和 1%的光引发剂混合后生成的 液晶层的响应时间为 35ms。上述各液晶复合材料中所用的紫外可聚合单体和 光引发剂选自上述那些。紫外可聚合单体中 n的数目对响应时间的影响甚微, 响应时间的不同主要取决于可聚合单体的比例。
本实施例提供的半透半反式液晶显示面板的工作原理为:
如图 1所示, 半透半反式液晶显示面板断电时, 在反射区入射光线两次 经过反射区的液晶层 6, 由于反射区的液晶层 6是入射区液晶层 6的一半, 因此, 反射区的光偏转的方向与入射区光线的偏转方向一致, 在液晶显示面 板断电时, 反射区和透射区均为暗场。
如图 5所示, 为本发明实施例提供的半透半反液晶式显示面板的工作状 态示意图,由于高分子网络 7可以将半透半反式液晶显示面板内的液晶锚定, 限制液晶的滑动, 从而使液晶能够排列成层状, 当半透半反式液晶显示面板 通电后, 液晶能够在电场力的作用下快速地转动, 提高了半透半反式液晶显 示面板的响应速度。 当半透半反式液晶显示面板断电后, 为了使液晶能够快 速地回到初始位置, 在第一平行取向层 5和第二平行取向层 8的作用下, 液 晶发生偏转, 回到初始状态。
在本发明的实施例中, 通过将所述的液晶复合材料引入显示面板中, 可 以在该显示面板的液晶层中形成能够锚定液晶的高分子网络, 该高分子网络 可限制液晶的滑动而使液晶成层状排列。 含该液晶复合材料的显示面板在通 电后, 其中的液晶能够快速转动, 从而提高该显示面板的响应速度, 缩短显 示装置的反应时间。
图 3显示了引入含高分子网络的液晶复合材料与现有液晶的显示面板响 应时间对比图, 其中, 横轴为响应时间, 纵轴为液晶的透过率, 即显示面板 在通断电时, 图 1中所示的液晶层 6的光透过率变化。 所述液晶复合材料由 89%的液晶、 10%聚合单体(1, 4-双 (4- (6,-丙烯氧基己氧基)苯甲酰氧基) -2- 甲苯)和 1%的光引发剂(安息香苯甲醚, 北京化学试剂有限公司聚合制得)。 所采用的显示面板为半透板反式显示面板。 在图 3中, 可明显看出现有技术 中的液晶的响应曲线 12与本发明实施例提供的液晶复合材料的响应曲线 13 的变化差距。 通过使用测试 cell进行测试, 本发明实施例提供的液晶复合材 料透过率发生变化, 其响应时间为 30ms, 而未使用聚合单体的响应时间在 50ms左右。 因此,本发明实施例提供的液晶复合材料可以明显缩短显示装置 的响应时间。 发明的精神和范围。 这样, 倘若本发明的这些修改和变型属于本发明权利要 求及其等同技术的范围之内, 则本发明也意图包含这些改动和变型在内。

Claims

权利要求书
1、一种液晶复合材料, 其包括液晶以及锚定液晶的高分子网络, 所述高 分子
Figure imgf000012_0001
; 其中, n=2、 3、 4、 5、 6、 7或 8。
2、 一种显示面板, 包括相对设置的第一基板和第二基板, 其中, 所述相 对设置的第一基板和第二基板之间设置有权利要求 1所述的液晶复合材料。
3、如权利要求 2所述的显示面板, 其中, 所述显示面板为全透式液晶显 示面板。
4、如权利要求 2所述的显示面板, 其中, 所述显示面板为半透半反式液 晶显示面板。
5、 一种显示面板的制造方法, 包括以下步骤:
避光混合按重量计 90~98%的液晶、 0.1~1%的光引发剂、 1~9%的具有下 式结构的紫外可聚合单体:
Figure imgf000012_0002
, 其中, n=2、 3、 4、 5、 6、 7或 8, 得到液晶混合物;
将所述液晶混合物滴加到第一基板上并进行真空对盒;
将对盒后的显示面板进行紫外线照射, 使所述紫外可聚合单体聚合反应 生成高分子网络;
将紫外线照射后的显示面板进行加热处理。
6、如权利要求 5所述的显示面板的制造方法, 其中, 所述紫外线照射的 紫外线强度为 l~100mW/cm2, 照射时间为 5~60分钟。
7、如权利要求 6所述的显示面板的制造方法, 其中, 显示面板进行加热 处理时的加热温度为 100°C~120°C。
8、 如权利要求 7 所述的显示面板的制造方法, 其中, 所述加热温度为 110°C。
9、 如权利要求 5~8任一项所述的显示面板的制造方法, 其中, 在将所 述液晶混合物滴加到第一基板之前, 还包括:
将所述液晶混合物放置到脱泡器中进行脱泡处理, 其脱泡时间为 1~3小 时。 种显示装置, 其包括如权利要求 2~4任一项所述的显示面板。
PCT/CN2013/084622 2013-04-19 2013-09-29 液晶复合材料、包含其的显示面板和显示装置及显示面板制造方法 Ceased WO2014169586A1 (zh)

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