WO2014075322A1 - 液晶分子预倾角的设置方法 - Google Patents

液晶分子预倾角的设置方法 Download PDF

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Publication number
WO2014075322A1
WO2014075322A1 PCT/CN2012/084856 CN2012084856W WO2014075322A1 WO 2014075322 A1 WO2014075322 A1 WO 2014075322A1 CN 2012084856 W CN2012084856 W CN 2012084856W WO 2014075322 A1 WO2014075322 A1 WO 2014075322A1
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Prior art keywords
liquid crystal
small
crystal molecules
control circuit
ultraviolet light
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PCT/CN2012/084856
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English (en)
French (fr)
Inventor
钟新辉
冯惺
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TCL China Star Optoelectronics Technology Co Ltd
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Shenzhen China Star Optoelectronics Technology Co Ltd
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Priority to DE112012007133.6T priority Critical patent/DE112012007133B4/de
Priority to US13/807,715 priority patent/US8953140B2/en
Publication of WO2014075322A1 publication Critical patent/WO2014075322A1/zh
Anticipated expiration legal-status Critical
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    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL 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
    • G02F1/00Devices 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
    • G02F1/01Devices 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 
    • G02F1/13Devices 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
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333Constructional arrangements; Manufacturing methods
    • G02F1/1337Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
    • G02F1/133753Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers with different alignment orientations or pretilt angles on a same surface, e.g. for grey scale or improved viewing angle
    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL 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
    • G02F1/00Devices 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
    • G02F1/01Devices 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 
    • G02F1/13Devices 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
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333Constructional arrangements; Manufacturing methods
    • G02F1/1337Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
    • G02F1/13378Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers by treatment of the surface, e.g. embossing, rubbing or light irradiation
    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL 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
    • G02F1/00Devices 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
    • G02F1/01Devices 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 
    • G02F1/13Devices 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
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333Constructional arrangements; Manufacturing methods
    • G02F1/1337Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
    • G02F1/133753Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers with different alignment orientations or pretilt angles on a same surface, e.g. for grey scale or improved viewing angle
    • G02F1/133761Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers with different alignment orientations or pretilt angles on a same surface, e.g. for grey scale or improved viewing angle with different pretilt angles

Definitions

  • the present invention relates to a method of fabricating a liquid crystal display device, and more particularly to a method of setting a pretilt angle of liquid crystal molecules in a liquid crystal display device. Background technique
  • the liquid crystal display device is a display device including a liquid crystal material sealed between two opposite substrates, and the display device uses electrical excitation to perform light switching by photoelectric anisotropy of liquid crystal molecules.
  • the liquid crystal molecules have refractive index anisotropy, and the control of the brightness is realized by controlling the difference in light intensity transmitted by the liquid crystal molecules by applying a voltage to the liquid crystal molecules and thereby redirecting the axis of the refractive index anisotropy.
  • the quality of a liquid crystal display device depends first on its liquid crystal panel, because the quality of the liquid crystal panel directly affects the viewing effect of the screen, and the liquid crystal panel accounts for more than half of the cost of the whole machine, which is the main factor affecting the cost of the liquid crystal display device.
  • the liquid crystal panel is mainly composed of two glass substrates and a liquid crystal material provided on the glass substrate, and does not emit light by itself, and needs a backlight to be irradiated.
  • TFTs thin film transistors
  • a voltage is applied to liquid crystal molecules and ultraviolet rays are irradiated onto the liquid crystal molecules, it is actually usual to apply a TFT turn-on voltage to each of the gate bus lines and apply the data to each data bus.
  • the liquid crystal molecules are exposed to ultraviolet light irradiation, thereby completing the setting of the liquid crystal molecule pretilt angle.
  • the setting of the pretilt angle of the liquid crystal molecules is performed under irradiation of ultraviolet rays, and the liquid crystal material in the liquid crystal cell contains a polymer monomer which is photopolymerizable or thermally polymerizable.
  • a driving voltage is applied to the liquid crystal material containing the photopolymerizable or thermally polymerizable polymer monomer (the driving voltage is only for the liquid crystal molecules to be slightly deflected, and the liquid crystal molecules are set in advance)
  • the liquid crystal cell is irradiated with light having a strong ultraviolet component.
  • the liquid crystal material may be irradiated with low-intensity ultraviolet rays for a long time to sufficiently polymerize the photopolymerizable or thermally polymerizable polymer monomer, but in this way, the liquid crystal display device will undoubtedly be lowered.
  • FIG. 1 is a schematic diagram of a liquid crystal molecule pretilt angle setting in a liquid crystal material containing a photopolymer or a thermally polymerizable polymer monomer, in which liquid crystal molecules 100 are vertically arranged between two substrates 300 without applying a driving voltage, when applied When the voltage is driven, the liquid crystal molecules 100 are deflected by 0-90.
  • a pretilt angle is set to the liquid crystal molecules 100, and the pretilt angle is generally controlled at 2. within.
  • a liquid crystal material containing the photopolymer or the thermally polymerizable polymer monomer 200 is applied with ultraviolet light or ultraviolet light 400 to irradiate the photopolymerizable or thermally polymerizable polymer.
  • the monomer 200 is polymerized, whereby the pretilt angle is set to define the alignment direction of the liquid crystal molecules 100.
  • Fig. 2 is a schematic diagram showing the change of image residual rate with the amount of ultraviolet radiation. It can be seen from the figure that the residual ratio of the image is related to the amount of ultraviolet light.
  • the amount of irradiation is small, the polymer monomer cannot be sufficiently polymerized and cannot form a strong one. The crosslinked structure, so the probability of causing image sticking increases.
  • Figure 3 is a schematic diagram of several existing ultraviolet irradiation schemes, including: 1. Applying a driving voltage while irradiating light; 2. Applying a driving voltage while irradiating the light, then canceling the driving voltage and irradiating only the irradiation light; First, the light is irradiated, and then the driving voltage is applied while irradiating the light; 4. The light is irradiated first, and then the driving voltage is applied while the irradiation of the light is applied, and the driving voltage is canceled.
  • a liquid crystal material containing a light- or thermally polymerizable polymer monomer when irradiated with light having a certain intensity of ultraviolet light or ultraviolet light, a voltage for deflecting the liquid crystal molecules to a pretilt angle is applied, and then other light intensity is used.
  • the liquid crystal cell is irradiated with ultraviolet light or ultraviolet light.
  • the liquid crystal molecules deviate from the pretilt angle because there is no external driving, and the limitation of the liquid crystal molecules by the polymerized partial polymer at this time brings the region.
  • the difference in transmittance of the liquid crystal material forms a different contrast.
  • the liquid crystal material is irradiated with ultraviolet light or ultraviolet light without a voltage of the liquid crystal molecules being deflected or without applying a voltage. . ⁇
  • the number of the above steps is not less than two.
  • a disadvantage of the above method is that there are many steps for polymerizing the photopolymerizable or thermally polymerizable polymer monomer in the liquid crystal material, and each step has different requirements for the composition and intensity of the irradiated light, and for each There is a clear boundary between the steps, and the setting of each parameter between the steps is different, for example: the time at which the driving voltage is applied between steps, the change in light intensity between steps or the change in the intensity of ultraviolet light between steps.
  • the pretilt angle of the liquid crystal molecules changes, if the photopolymerizable or photopolymerizable polymer monomer is completely polymerized, the liquid crystal If the pretilt angle of the molecule changes greatly, different transmittances will be formed in this region, resulting in abnormal contrast.
  • the ultraviolet light containing the same intensity or ultraviolet light is irradiated for a long time to contain the above-mentioned light or heat.
  • the liquid crystal material of the polymerized polymer monomer also reduces the production efficiency of the liquid crystal display.
  • the liquid crystal material containing the photopolymerizable or thermally polymerizable polymer monomer when the liquid crystal material containing the photopolymerizable or thermally polymerizable polymer monomer is irradiated with ultraviolet light or ultraviolet rays, light is present in the liquid crystal material of the light shielding portion which is not irradiated with ultraviolet rays due to the presence of the light shielding portion in the TFT substrate. Or the thermally polymerized polymer monomer may not be completely polymerized. With the migration of the liquid crystal material, this part of the liquid crystal may appear in the display region, which is a partially crosslinked structure in which the photopolymer or the thermally polymerizable polymer monomer is not completely polymerized. Image sticking is formed in the normal display mode. Summary of the invention
  • the present invention provides a method for setting a pretilt angle of a liquid crystal molecule, comprising the following steps:
  • Step 1 providing a liquid crystal material, a CF substrate, and a TFT substrate;
  • Step 2 the CF substrate is disposed in parallel with the TFT substrate to form a receiving gap, and a liquid crystal material is filled in the receiving gap to form a liquid crystal cell;
  • Step 3 providing a driving control circuit capable of generating a plurality of driving voltages, and electrically connecting the driving control circuit to the TFT substrate;
  • Step 4 providing a small oscillating device and a variable intensity ultraviolet light source, placing the liquid crystal cell on the small vibration device;
  • Step 5 starting a small amplitude oscillating device, causing the liquid crystal cell to generate small amplitude oscillation, turning on the driving control circuit, and driving the liquid crystal material with a plurality of driving voltages.
  • the liquid crystal cell is irradiated with ultraviolet rays of different intensity by the ultraviolet light source;
  • Step 6 Perform the step 5 operation of the liquid crystal cell not less than one time to complete the setting of the pretilt angle.
  • a light shielding pattern is disposed on the TFT substrate.
  • the liquid crystal material comprises: a photopolymerizable or thermally polymerizable polymer monomer and a liquid crystal molecule, and the photopolymerizable or thermally polymerizable polymer monomer is polymerized under irradiation of an ultraviolet light source.
  • the driving control circuit drives deflection of liquid crystal molecules in the liquid crystal material, and the liquid crystal molecules are perpendicular to the CF substrate or the TFT substrate when the driving circuit has no driving voltage.
  • the small oscillating device in the step 5 causes the liquid crystal cell to generate a small oscillation, and the intensity of the small oscillation is insufficient to change the deflection angle of the liquid crystal molecules, and is not enough to cause the liquid crystal molecules to generate a large flow.
  • the drive control circuit generates a high, low level that causes the liquid crystal molecules to deflect at a small angle that is insufficient to cause the liquid crystal molecules to deflect at a small angle.
  • the ultraviolet light source generates first, second, third, and fourth illumination intensities, the first illumination intensity > the second illumination intensity > the third illumination intensity > the fourth illumination intensity.
  • the step 5 includes the following steps:
  • Step 501 Start a small amplitude oscillating device, so that the liquid crystal cell generates a small amplitude oscillation.
  • Step 502 During the first time period, the conduction driving control circuit outputs a high level, so that the liquid crystal molecules are deflected by a small angle, and the first illumination is used. The intensity of the ultraviolet light source illuminates the liquid crystal cell to start polymerization of the photopolymerizable or thermally polymerizable polymer monomer;
  • Step 503 In the second time period, the conduction driving control circuit outputs a high level, and irradiates the liquid crystal cell with the ultraviolet light source of the second light intensity;
  • Step 504 In the third time period, the conduction driving control circuit outputs a low level, and irradiates the liquid crystal cell with the ultraviolet light source of the fourth light intensity;
  • Step 505 Disconnect the driving control circuit during the fourth time period, and irradiate the liquid crystal cell with the ultraviolet light source of the third light intensity, so that the photopolymerizable or thermally polymerizable polymer monomer is fully polymerized.
  • the invention also provides a method for setting a pretilt angle of a liquid crystal molecule, comprising the following steps: Step 1. providing a liquid crystal material, a CF substrate and a TFT substrate;
  • Step 2 the CF substrate and the TFT substrate are arranged in parallel to form a receiving gap, and a liquid crystal material is filled in the receiving gap to form a liquid crystal cell;
  • Step 3 providing a driving control circuit capable of generating a plurality of driving voltages, and electrically connecting the driving control circuit to the TFT substrate;
  • Step 4 providing a small oscillating device and a variable intensity ultraviolet light source, and placing the liquid crystal cell on the small vibration device;
  • Step 5 Start a small amplitude oscillating device to make the liquid crystal cell generate small amplitude oscillation, turn on the driving control circuit, and drive the liquid crystal material by using various driving voltages.
  • the liquid crystal cell is irradiated with ultraviolet rays of different intensity by the ultraviolet light source;
  • Step 6 Perform the step 5 operation of the liquid crystal cell not less than once, and complete the setting of the pretilt angle;
  • the TFT substrate is provided with a light shielding pattern
  • the liquid crystal material comprises: a photopolymerizable or thermally polymerizable polymer monomer and a liquid crystal molecule, wherein the photopolymerizable or thermally polymerizable polymer monomer is polymerized under irradiation of an ultraviolet light source;
  • the driving control circuit drives liquid crystal molecules in the liquid crystal material to be deflected, and the liquid crystal molecules are perpendicular to the CF substrate or the TFT substrate when the driving circuit has no driving voltage;
  • the small oscillating device in the step 5 causes the liquid crystal cell to generate a small oscillation, and the intensity of the small oscillation is insufficient to change the deflection angle of the liquid crystal molecules, and is not enough to cause a large flow of the liquid crystal molecules;
  • the driving control circuit generates a high level, a low level, the high level causes a liquid crystal molecule to generate a small angle of deflection, the low level is insufficient to cause a liquid crystal molecule to generate a small angle deflection;
  • the ultraviolet light source generates First, second, third, and fourth illumination intensities, the first illumination intensity > the second illumination intensity > the third illumination intensity > the fourth illumination intensity;
  • the step 5 includes the following steps:
  • Step 501 Start a small amplitude oscillating device, so that the liquid crystal cell generates a small amplitude oscillation.
  • Step 502 During the first time period, the conduction driving control circuit outputs a high level, so that the liquid crystal molecules generate a small angle deflection, and use the first The ultraviolet light source of the light intensity illuminates the liquid crystal cell to start polymerization of the photopolymerizable or thermally polymerizable polymer monomer;
  • Step 503 In the second time period, the conduction driving control circuit outputs a high level, and irradiates the liquid crystal cell with the ultraviolet light source of the second light intensity;
  • Step 504 In the third time period, the conduction driving control circuit outputs a low level, and irradiates the liquid crystal cell with the ultraviolet light source of the fourth light intensity;
  • Step 505 Disconnect the driving control circuit in the fourth period of time, and irradiate the liquid crystal cell with the ultraviolet light source of the third light intensity, so that the photopolymerizable or thermally polymerizable polymer monomer is sufficiently polymerized;
  • Advantageous Effects of the Invention The method for setting the pretilt angle of the liquid crystal molecules of the present invention is irradiated with ultraviolet light of different light intensities at different time periods, and the liquid crystal molecules are driven by different driving voltages, and the liquid crystal cell is made by using a small amplitude oscillation device.
  • Figure 1 is a schematic diagram showing the pretilt angle setting of liquid crystal molecules in a liquid crystal material containing a photopolymerizable or thermally polymerizable polymer monomer;
  • Figure 2 is a schematic diagram showing the change of image residual rate with the amount of ultraviolet irradiation
  • Figure 3 is a schematic view of several existing ultraviolet irradiation schemes
  • FIG. 4 is a flow chart showing a method for setting a pretilt angle of a liquid crystal molecule according to the present invention
  • FIG. 5 is a schematic view showing the output level of the drive control circuit in time in step 5 of the method for setting the pretilt angle of the liquid crystal molecules of the present invention
  • Fig. 6 is a view showing the change of the irradiation intensity of the ultraviolet light source with time in the step 5 of the method for setting the pretilt angle of the liquid crystal molecules of the present invention.
  • the present invention provides a method for setting a pretilt angle of a liquid crystal molecule, which comprises the following steps:
  • Step 1 providing a liquid crystal material, a CF (color filter, color filter) substrate, and a TFT (Thin Film Transistor, thin film field effect transistor) substrate;
  • the TFT substrate is provided with a light shielding pattern, and the liquid crystal material comprises: light or thermal polymerization
  • the polymer monomer and the liquid crystal molecules are polymerized by the ultraviolet light source, and the stronger the irradiation intensity, the faster the polymerization speed.
  • Step 2 the CF substrate is disposed in parallel with the TFT substrate to form a receiving gap, and a liquid crystal material is filled in the receiving gap to form a liquid crystal cell;
  • Step 3 providing a driving control circuit capable of generating a plurality of driving voltages, and electrically connecting the driving control circuit to the TFT substrate;
  • the driving control circuit drives deflection of liquid crystal molecules in the liquid crystal material, and the liquid crystal molecules are perpendicular to the CF substrate or the TFT substrate when the driving circuit has no driving voltage.
  • the driving control circuit generates high and low levels, and the driving control circuit is continuous from a high level to a low level, and the high level causes the liquid crystal molecules to generate a small angle. Deflection, the low level is insufficient to cause liquid crystal molecules to deflect at a small angle.
  • Step 4 providing a small oscillating device and a variable intensity ultraviolet light source, and placing the liquid crystal cell on the small vibration device;
  • the small oscillating device causes the liquid crystal cell to generate a small oscillation, and the intensity of the small oscillation is insufficient to change the deflection angle of the liquid crystal molecules, and is not sufficient to cause a large flow of the liquid crystal molecules.
  • the ultraviolet light source generates first, second, third, and fourth illumination intensities El, E2, E3, and E4, and the illumination intensity El > ⁇ 2 illumination intensity E2 > ⁇ three illumination intensity £ > fourth illumination Strength E4.
  • Step 5 Start a small amplitude oscillating device to make the liquid crystal cell generate small amplitude oscillation, turn on the driving control circuit, and drive the liquid crystal material by using various driving voltages.
  • the liquid crystal cell is irradiated with ultraviolet rays of different intensity by the ultraviolet light source;
  • the step 5 includes the following steps:
  • Step 501 starting a small amplitude oscillation device, so that the liquid crystal cell generates a small amplitude oscillation; Step 502, in the first time period (tl), turning on the driving control circuit to output a high level
  • the liquid crystal molecules rapidly deflect at a small angle, and the angle of the deflection reaches the pretilt angle requirement.
  • the first time period ( tl ) is controlled in a relatively short period of time, which can prevent the photopolymerizable or thermally polymerized polymer from being over-cured due to excessive illumination, and losing its own Elasticity, which in turn ensures the optical properties of the liquid crystal molecules.
  • Step 503 In the second time period (t2-tl), the conduction driving control circuit outputs a high level U1, and irradiates the liquid crystal cell with the ultraviolet light source of the second light intensity E2;
  • Illuminating the liquid crystal cell with a weak second light intensity E2 ensuring In the case where the photopolymer or the thermally polymerizable polymer monomer is sufficiently polymerized, the photocurable or thermally polymerizable polymer is prevented from being over-cured.
  • Step 504 In the third time period (t3-t2), the conduction driving control circuit outputs a low level U2, and irradiates the liquid crystal cell with the ultraviolet light source of the fourth light intensity E4;
  • the polymerization of the polymerizable or thermally polymerizable polymer in the U2 state is carried out for a longer period of time (the third period) to further ensure sufficient polymerization.
  • Step 505 In the fourth time period (t4-t3), disconnect the driving control circuit, and illuminate the liquid crystal cell with the ultraviolet light source of the third light intensity E3, so that the photopolymer or the photopolymerizable polymer monomer is sufficient polymerization.
  • Step 6 Perform the step 5 operation of the liquid crystal cell not less than one time to complete the setting of the pretilt angle.
  • step 5 The operation of step 5 is repeated in this step 6, and the number of repetitions is set according to the actual setting.
  • the small amplitude oscillation device is used to cause the liquid crystal cell to oscillate a small amplitude, so that the liquid crystal molecules in the liquid crystal cell generate a small amplitude flow, so that the light or thermal polymerization under the light shielding portion of the TFT substrate is achieved.
  • the monomer will flow to the non-shielding portion in a small amount and be polymerized by irradiation with an ultraviolet light source, thereby ensuring sufficient polymerization of the photopolymer or the thermally polymerizable polymer monomer to prevent image sticking.
  • the present invention provides a method for setting a pretilt angle of a liquid crystal molecule, which is irradiated with ultraviolet light of different light intensities at different times, and drives liquid crystal molecules with different driving voltages, and uses a small amplitude oscillation device.
  • the liquid crystal cell is caused to oscillate with a small amplitude, and all liquid crystal molecules are irradiated with ultraviolet rays as much as possible, so that the photopolymerizable or thermally polymerizable polymer monomer is sufficiently polymerized to eliminate image sticking phenomenon, and the liquid crystal molecules have a uniform pretilt angle, so that The liquid crystal material has a uniform light transmittance, ensures the contrast of the liquid crystal display, improves the performance of the liquid crystal display, and improves the production efficiency of the liquid crystal display.

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Mathematical Physics (AREA)
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Abstract

一种液晶分子预倾角的设置方法,包括:步骤1、提供液晶材料、CF基板及TFT基板;步骤2、将CF基板与TFT基板平行设置形成一容置间隙,并将液晶材料填充于该容置间隙中,形成液晶盒;步骤3、提供一种可产生多种驱动电压的驱动控制电路,将该驱动控制电路与TFT基板电性连接;步骤4、提供一小幅震荡装置及一照射强度可变的紫外线光源,将液晶盒置于小幅震荡装置上;步骤5、启动小幅震荡装置,使液晶盒产生小幅度震荡,导通驱动控制电路,采用多种驱动电压驱动液晶材料,同时,通过紫外线光源对液晶盒进行不同强度的紫外线照射;步骤6、对液晶盒进行不少于一次的步骤5操作,完成预倾角的设置。

Description

液晶分子预倾角的设置方法
技术领域
本发明涉及液晶显示器件的制造方法, 尤其涉及液晶显示器件中液晶 分子预倾角的设置方法。 背景技术
液晶显示器件是一种显示器件, 该显示器件包括密封在两个相对的基 板之间的液晶材料, 并且该显示器件使用电激励以通过液晶分子的光电各 向异性来进行光切换。 同时利用液晶分子具有折射率各向异性, 通过向液 晶分子施加电压并由此重定向折射率各向异性的轴来控制由液晶分子透射 的光强度的不同来实现亮度的控制。 一个液晶显示器件的好坏首先要看它 的液晶面板, 因为液晶面板的好坏直接影响到画面的观看效果, 并且液晶 面板占到了整机成本的一半以上, 是影响液晶显示器件的造价的主要因 素, 所以要选一款好的液晶显示器件, 首先要选好它的液晶面板。 液晶面 板主要由两层玻璃基板及设于玻璃基板的液晶材料组成, 其本身不发光, 需要背光源照射。
目前通常采用无源矩阵驱动和有源矩阵驱动的技术来驱动液晶。 随着 对更高分辨率的需求的增加, 使用薄膜晶体管 (TFT ) 的有源矩阵显示模 式成为主要的液晶显示模式。 在具有这种薄膜晶体管结构的液晶显示器 中, 当对液晶分子施加电压的同时将紫外线照射到液晶分子上, 实际上通 常是向各选通总线施加 TFT 导通电压并向各数据总线施加所需电压的同 时, 将液晶分子暴露在紫外线照射中, 进而完成液晶分子预倾角的设置。
如上所述, 对于液晶分子的预倾角的设置, 是在紫外线的照射下进行 的, 在液晶盒中的液晶材料含有可光或者热聚合的聚合物单体。 为使可光 或者热聚合的聚合物单体完全聚合, 在含有该可光或者热聚合的聚合物单 体的液晶材料加驱动电压 (该驱动电压只是为了使液晶分子小幅偏转, 提前 设置液晶分子的预倾角)情况下采用含有较强紫外线成分的光照射该液晶 盒。 但是增加照射光的强度或者照射光中紫外线的强度就会造成液晶材料 透射率的降低, 由此带来对比度降低的问题发生。 为了避免透射率降低带 来的对比度问题可以釆用低强度紫外线长时间照射液晶材料来使可光或者 热聚合的聚合物单体充分聚合, 但是釆用这种方式无疑将会降低液晶显示 器件的生产效率。 图 1 为含有可光或者热聚合的聚合物单体的液晶材料中液晶分子预倾 角设置原理图, 图中液晶分子 100在没有施加驱动电压的情况下垂直排列 于两基板 300之间, 当施加驱动电压时, 液晶分子 100偏转 0-90° 。 为了 提高液晶显示器件的响应速度则对液晶分子 100设置一个预倾角, 预倾角 度的大小一般控制在 2。 之内。 在施加使液晶分子 100偏转至预倾角的电 压情况下, 对含有可光或者热聚合的聚合物单体 200 的液晶材料施加含有 紫外线的光或者紫外线光 400照射使可光或者热聚合的聚合物单体 200聚 合, 以此来设置预倾角限定液晶分子 100的排列方向。
图 2为图像残留率随紫外线照射量变化的示意图, 从图中可以看出图 像的残留率和紫外线光照的量有关, 当照射量较小时, 不能使聚合物单体 充分聚合, 不能形成强的交联结构, 所以导致图像残留的概率增加。
图 3 为现有的几种紫外线照射方案示意图, 包括: 1、 照射光照射的 同时施加驱动电压; 2、 先照射光照射的同时施加驱动电压, 后取消驱动 电压, 只照射照射光; 3、 先照射光照射, 后在照射光照射的同时施加驱 动电压; 4、 先照射光照射, 后在照射光照射的同时施加驱动电压, 再取 消驱动电压。 图中在含有某一光强的紫外线的光或者紫外线光照射含有可 光或者热聚合的聚合物单体的液晶材料时, 施加使液晶分子偏转至预倾角 的电压, 之后再利用其他光强的含有紫外线的光或者紫外线光照射该液晶 盒。 但是在不施加驱动电压的情况下的液晶材料被照射光照射时, 由于没 有了外在驱动, 液晶分子会偏离预倾角度, 此时聚合的部分聚合物对液晶 分子的限定会带来该区域的液晶材料的透光率的差异, 形成不同的对比 度。
在中国专利申请号为 0281491.8 的专利中, 针对照射光对上述液晶分 子预倾角设置的照射方法提出:
1、 在液晶分子设置预倾角步骤之前施加一个大于液晶分子偏转的阈 值电压但小于液晶分子偏转的饱和电压的电压 Vx, 然后改变该 Vx电压为 V, 并在施加电压 V 的过程中施加含有紫外线的光或者紫外线光照射上述 液晶材料使可光或者热聚合的聚合物单体聚合, 以此来限定液晶分子的预 倾角。
2、 利用可光或者热聚合的聚合物单体聚合设置预倾角步骤之后, 釆 用一个不使液晶分子偏转的电压或者不施加电压的情况下的含有紫外线的 光或者紫外线光照射上述液晶材,。 ^ 一 的聚合物单体聚合的步骤中, 釆用上述步骤数不少于 2个。 上述方法的缺陷在于: 使液晶材料中的可光或者热聚合的聚合物单体 聚合所采用的步骤较多, 并且每个步骤中对于照射光的成分和强度都有不 同的要求, 另外对于每个步骤之间明确的界限, 步骤之间的各个参数的设 置又不同, 例如: 步骤之间的驱动电压所加的时刻, 步骤之间光强的变化 或者步骤之间紫外线的强度的变化等。
而且, 在不施加电压或者施加不能使液晶分子偏转的电压情况下的含 有紫外线的光或者紫外线光照时, 液晶分子的预倾角会改变, 如果可光或 者热聚合的聚合物单体完全聚合后液晶分子的预倾角变化较大的话, 将会 在该区域形成不同的透射率, 带来对比度异常。 在可光或者热聚合物单体 聚合后, 不施加电压或者施加不足以使液晶分子偏转的电压的情况下, 釆 用同一强度的含有紫外线的光或者紫外线长时间照射上述的含有可光或者 热聚合的聚合物单体的液晶材料, 这样同样会降低液晶显示器的生产效 率。
另外, 在含有紫外线的光或者紫外线照射上述含有可光或者热聚合的 聚合物单体的液晶材料时, 由于 TFT基板中存在遮光部分, 对于紫外线未 照射到的遮光部分的液晶材料中的可光或者热聚合的聚合物单体可能不会 完全聚合, 随着液晶材料的迁移此部分液晶会出现在显示区域中, 这部分 可光或者热聚合的聚合物单体未完全聚合的低交联结构在正常显示模式下 会形成图像残留。 发明内容
本发明的目的在于提供一种液晶分子预倾角的设置方法, 使得可光或 者热聚合的聚合物单体充分聚合, 且所述液晶分子具有一致的预倾角, 使 得液晶材料具有一致的透光率, 保证了液晶显示器的对比度, 提高液晶显 示器的性能的同时, 提高了液晶显示器的生产效率。
为实现上述目的, 本发明提供一种液晶分子预倾角的设置方法, 包括 以下步骤:
步骤 1、 提供液晶材料、 CF基板及 TFT基板;
步骤 2、 将 CF基板与所述 TFT基板平行设置形成一容置间隙, 并将 液晶材料填充于该容置间隙中, 形成液晶盒;
步骤 3、 提供一种可产生多种驱动电压的驱动控制电路, 将该驱动控 制电路与 TFT基板电性连接;
步骤 4、 提供一小幅震荡装置及一照射强度可变的紫外线光源, 将所 述液晶盒置于所述小幅振动装置上; 步骤 5、 启动小幅振荡装置, 使液晶盒产生小幅度振荡, 导通驱动控 制电路, 釆用多种驱动电压驱动液晶材料, 在此过程中, 通过紫外线光源 对液晶盒进行不同强度的紫外线照射;
步骤 6、 对所述液晶盒进行不少于一次的步骤 5 操作, 完成预倾角的 设置。
所述 TFT基板上设有遮光图案。
所述液晶材料包括: 可光或者热聚合的聚合物单体及液晶分子, 所述 可光或者热聚合的聚合物单体在紫外线光源照射下聚合。
所述驱动控制电路驱动所述液晶材料中的液晶分子偏转, 所述液晶分 子在所述驱动电路无驱动电压时, 垂直于所述 CF基板或者 TFT基板。
所述步骤 5 小幅震荡装置使液晶盒产生小幅震荡, 该小幅震荡的强度 不足以改变液晶分子的偏转角度, 也不足以使液晶分子产生大幅度的流 动。
所述驱动控制电路产生高、 低电平, 所述高电平使得液晶分子产生小 角度的偏转, 所述低电平不足以使得液晶分子产生小角度偏转。
所述紫外线光源产生第一、 第二、 第三及第四光照强度, 所述第一光 照强度〉第二光照强度〉第三光照强度〉第四光照强度。
所述步骤 5包括以下步骤:
步骤 501、 启动小幅度震荡装置, 使得液晶盒产生小幅度振荡; 步骤 502、 在第一时间段内, 导通驱动控制电路输出高电平, 使液晶 分子产生小角度偏转, 并采用第一光照强度的紫外线光源对液晶盒进行照 射, 使可光或者热聚合的聚合物单体开始聚合;
步驟 503、 在第二时间段内, 导通驱动控制电路输出高电平, 并采用 第二光照强度的紫外线光源对液晶盒进行照射;
步骤 504、 在第三时间段内, 导通驱动控制电路输出低电平, 并采用 第四光照强度的紫外线光源对液晶盒进行照射;
步驟 505、 在第四时间段内, 断开驱动控制电路, 并采用第三光照强 度的紫外线光源对液晶盒进行照射, 使得可光或者热聚合的聚合物单体充 分聚合。
所述第一时间段 <第二时间段〈第四时间段 <第三时间段。
本发明还提供一种液晶分子预倾角的设置方法, 包括以下步骤: 步骤 1、 提供液晶材料、 CF基板及 TFT基板;
步驟 2、 将 CF基板与所述 TFT基板平行设置形成一容置间隙, 并将 液晶材料填充于该容置间隙中, 形成液晶盒; 步骤 3、 提供一种可产生多种驱动电压的驱动控制电路, 将该驱动控 制电路与 TFT基板电性连接;
步骤 4、 提供一小幅震荡装置及一照射强度可变的紫外线光源, 将所 述液晶盒置于所述小幅振动装置上;
步骤 5、 启动小幅振荡装置, 使液晶盒产生小幅度振荡, 导通驱动控 制电路, 采用多种驱动电压驱动液晶材料, 在此过程中, 通过紫外线光源 对液晶盒进行不同强度的紫外线照射;
步骤 6、 对所述液晶盒进行不少于一次的步骤 5 操作, 完成预倾角的 设置;
其中, 所述 TFT基板上设有遮光图案;
其中, 所述液晶材料包括: 可光或者热聚合的聚合物单体及液晶分 子, 所述可光或者热聚合的聚合物单体在紫外线光源照射下聚合;
其中, 所述驱动控制电路驱动所述液晶材料中的液晶分子偏转, 所述 液晶分子在所述驱动电路无驱动电压时, 垂直于所述 CF基板或者 TFT基 板;
其中, 所述步骤 5 小幅震荡装置使液晶盒产生小幅震荡, 该小幅震荡 的强度不足以改变液晶分子的偏转角度, 也不足以使液晶分子产生大幅度 的流动;
其中, 所述驱动控制电路产生高、 低电平, 所述高电平使得液晶分子 产生小角度的偏转, 所述低电平不足以使得液晶分子产生小角度偏转; 其中, 所述紫外线光源产生第一、 第二、 第三及第四光照强度, 所述 第一光照强度〉第二光照强度 >第三光照强度〉第四光照强度;
其中, 所述步骤 5包括以下步骤:
步骤 501、 启动小幅度震荡装置, 使得液晶盒产生小幅度振荡; 步骤 502、 在第一时间段内, 导通驱动控制电路输出高电平, 使液晶 分子产生小角度偏转, 并釆用第一光照强度的紫外线光源对液晶盒进行照 射, 使可光或者热聚合的聚合物单体开始聚合;
步骤 503、 在第二时间段内, 导通驱动控制电路输出高电平, 并采用 第二光照强度的紫外线光源对液晶盒进行照射;
步骤 504、 在第三时间段内, 导通驱动控制电路输出低电平, 并釆用 第四光照强度的紫外线光源对液晶盒进行照射;
步骤 505、 在第四时间段内, 断开驱动控制电路, 并釆用第三光照强 度的紫外线光源对液晶盒进行照射, 使得可光或者热聚合的聚合物单体充 分聚合; 其中, 所述第一时间段 <第二时间段〈第四时间段〈第三时间段。 本发明的有益效果: 本发明液晶分子预倾角的设置方法在不同的时间 段采用不同光强的紫外线进行照射的同时, 采用不同的驱动电压驱动液晶 分子, 并釆用小幅度震荡装置使得液晶盒产生小幅度振荡, 尽量使得所有 液晶分子均受到紫外线的照射, 使得可光或者热聚合的聚合物单体充分聚 合, 消除图像残留现象, 且所述液晶分子具有一致的预倾角, 使得液晶材 料具有一致的透光率, 保证了液晶显示器的对比度, 提高液晶显示器的性 能的同时, 提高了液晶显示器的生产效率。
为了能更进一步了解本发明的特征以及技术内容, 请参阅以下有关本 发明的详细说明与附图, 然而附图仅提供参考与说明用, 并非用来对本发 明加以限制。 附图说明
下面结合附图, 通过对本发明的具体实施方式详细描述, 将使本发明 的技术方案及其它有益效果显而易见。
附图中,
图 1 为含有可光或者热聚合的聚合物单体的液晶材料中液晶分子的预 倾角设置原理图;
图 2为图像残留率随紫外线照射量变化的示意图;
图 3为现有的几种紫外线照射方案示意图;
图 4为本发明液晶分子预倾角的设置方法的流程图;
图 5为本发明液晶分子预倾角的设置方法步骤 5中驱动控制电路输出 电平随时间变化的示意图;
图 6为本发明液晶分子预倾角的设置方法步骤 5中紫外线光源的照射 强度随时间变化的示意图。 具体实施方式
为更进一步阐述本发明所采取的技术手段及其效杲, 以下结合本发明 的优选实施例及其附图进行详细描述。
请参阅图 4-6, 本发明提供一种液晶分子预倾角的设置方法, 包括以 下步骤:
步骤 1、 提供液晶材料、 CF ( color filter、 彩色滤光片)基板及 TFT ( Thin Film Transistor 、 薄膜场效应晶体管)基板;
所述 TFT基板上设有遮光图案, 所述液晶材料包括: 可光或者热聚合 的聚合物单体及液晶分子, 所述可光或者热聚合的聚合物单体在紫外线光 源照射下聚合, 照射强度越强, 聚合速度越快。
步骤 2、 将 CF基板与所述 TFT基板平行设置形成一容置间隙, 并将 液晶材料填充于该容置间隙中, 形成液晶盒;
所述液晶材料密封填充于 CF基板与 TFT基板形成的容置间隙中。 步骤 3、 提供一种可产生多种驱动电压的驱动控制电路, 将该驱动控 制电路与 TFT基板电性连接;
所述驱动控制电路驱动所述液晶材料中的液晶分子偏转, 所述液晶分 子在所述驱动电路无驱动电压时, 垂直于所述 CF基板或者 TFT基板。
在本较佳实施例中所述驱动控制电路产生高、 低电平, 且所述驱动控 制电路由高电平转换至低电平是连续的, 所述高电平使得液晶分子产生小 角度的偏转, 所述低电平不足以使得液晶分子产生小角度偏转。
步骤 4、 提供一小幅震荡装置及一照射强度可变的紫外线光源, 将所 述液晶盒置于所述小幅振动装置上;
所述小幅震荡装置使液晶盒产生小幅震荡, 该小幅震荡的强度不足以 改变液晶分子的偏转角度, 也不足以使液晶分子产生大幅度的流动。
所述紫外线光源产生第一、 笫二、 第三及第四光照强度 El、 E2、 E3 及 E4, 所述笫一光照强度 El >笫二光照强度 E2 >笫三光照强度 £3 >第 四光照强度 E4。
步骤 5、 启动小幅振荡装置, 使液晶盒产生小幅度振荡, 导通驱动控 制电路, 采用多种驱动电压驱动液晶材料, 在此过程中, 通过紫外线光源 对液晶盒进行不同强度的紫外线照射;
所述步骤 5包括以下步骤:
步骤 501、 启动小幅度震荡装置, 使得液晶盒产生小幅度振荡; 步骤 502、 在第一时间段 (tl ) 内, 导通驱动控制电路输出高电平
U1 , 使液晶分子产生小角度偏转, 并釆用第一光照强度 E1 的紫外线光源 对液晶盒进行照射, 使可光或者热聚合的聚合物单体开始聚合;
在高电平的驱动下, 液晶分子快速发生小角度偏转, 该偏转的角度达 到预倾角的要求。 在本较佳实施例中, 所述第一时间段( tl )控制在较短 时间内, 这就可以避免因光照过强而使得可光或者热聚合的聚合物处于过 固化状态, 失去本身的弹性, 进而保证了液晶分子的光学特性。
步骤 503、 在第二时间段(t2-tl ) 内, 导通驱动控制电路输出高电平 U1 , 并釆用第二光照强度 E2的紫外线光源对液晶盒进行照射;
采用较弱的第二光照强度 E2 的紫外线光源对液晶盒进行照射, 确保 可光或者热聚合的聚合物单体充分聚合的情况下, 防止可光或者热聚合的 聚合物过固化。
步骤 504、 在第三时间段(t3-t2 ) 内, 导通驱动控制电路输出低电平 U2 , 并釆用第四光照强度 E4的紫外线光源对液晶盒进行照射;
采用较长的时间段(第三时间段)进行低电平 U2 状态下可光或者热 聚合的聚合物单体聚合, 进一步确保聚合充分。
步骤 505、 在第四时间段(t4-t3 ) 内, 断开驱动控制电路, 并釆用第 三光照强度 E3 的紫外线光源对液晶盒进行照射, 使得可光或者热聚合的 聚合物单体充分聚合。
其中, 所述第一时间段( tl ) <第二时间段( t2-tl ) <第四时间段
( t3-t2 ) <第三时间段 ( t4-t3 ) 。
步骤 6、 对所述液晶盒进行不少于一次的步骤 5 操作, 完成预倾角的 设置。
在该步骤 6中重复步骤 5的操作, 重复的次数根据实际设定。
值得一提的是: 在步骤 5 中采用小幅度振荡装置使液晶盒发生小幅度 振荡, 使得液晶盒里的液晶分子产生小幅度流动 , 使得由于 TFT基板遮光 部分下的可光或者热聚合的聚合物单体会小幅度流到非遮光部分中, 被紫 外线光源照射而聚合, 从而保证可光或者热聚合的聚合物单体充分聚合, 防止图像残留现象产生。
综上所述, 本发明提供一种液晶分子预倾角的设置方法, 在不同的时 间段采用不同光强的紫外线进行照射的同时, 釆用不同的驱动电压驱动液 晶分子, 并采用小幅度震荡装置使得液晶盒产生小幅度振荡, 尽量使得所 有液晶分子均受到紫外线的照射, 使得可光或者热聚合的聚合物单体充分 聚合, 消除图像残留现象, 且所述液晶分子具有一致的预倾角, 使得液晶 材料具有一致的透光率, 保证了液晶显示器的对比度, 提高液晶显示器的 性能的同时, 提高了液晶显示器的生产效率。
以上所述, 对于本领域的普通技术人员来说, 可以根据本发明的技术 方案和技术构思作出其他各种相应的改变和变形, 而所有这些改变和变形 都应属于本发明权利要求的保护范围。

Claims

权 利 要 求
1、 一种液晶分子预倾角的设置方法, 包括以下步骤:
步骤 1、 提供液晶材料、 CF基板及 TFT基板;
步骤 2、 将 CF基板与所述 TFT基板平行设置形成一容置间隙, 并将 液晶材料填充于该容置间隙中, 形成液晶盒;
步骤 3、 提供一种可产生多种驱动电压的驱动控制电路, 将该驱动控 制电路与 TFT基板电性连接;
步骤 4、 提供一小幅震荡装置及一照射强度可变的紫外线光源, 将所 述液晶盒置于所述小幅振动装置上;
步骤 5、 启动小幅振荡装置, 使液晶盒产生小幅度振荡, 导通驱动控 制电路, 采用多种驱动电压驱动液晶材料, 在此过程中, 通过紫外线光源 对液晶盒进行不同强度的紫外线照射;
步骤 6、 对所述液晶盒进行不少于一次的步骤 5 操作, 完成预倾角的 设置。
2、 如权利要求 1 所述的液晶分子预倾角的设置方法, 其中, 所述 TFT基板上设有遮光图案。
3、 如权利要求 1 所述的液晶分子预倾角的设置方法, 其中, 所述液 晶材料包括: 可光或者热聚合的聚合物单体及液晶分子, 所述可光或者热 聚合的聚合物单体在紫外线光源照射下聚合。
4、 如权利要求 3 所述的液晶分子预倾角的设置方法, 其中, 所述驱 动控制电路驱动所述液晶材料中的液晶分子偏转, 所述液晶分子在所述驱 动电路无驱动电压时, 垂直于所述 CF基板或者 TFT基板。
5、 如权利要求 3 所述的液晶分子预倾角的设置方法, 其中, 所述步 骤 5 小幅震荡装置使液晶盒产生小幅震荡, 该小幅震荡的强度不足以改变 液晶分子的偏转角度, 也不足以使液晶分子产生大幅度的流动。
6、 如权利要求 3 所述的液晶分子预倾角的设置方法, 其中, 所述驱 动控制电路产生高、 低电平, 所述高电平使得液晶分子产生小角度的偏 转, 所述低电平不足以使得液晶分子产生小角度偏转。
7、 如权利要求 6 所述的液晶分子预倾角的设置方法, 其中, 所述紫 外线光源产生第一、 第二、 第三及第四光照强度, 所述第一光照强度 >第 二光照强度〉第三光照强度〉第四光照强度。
8、 如权利要求 7 所述的液晶分子预倾角的设置方法, 其中, 所述步 骤 5包括以下步骤:
步骤 501、 启动小幅度震荡装置, 使得液晶盒产生小幅度振荡; 步骤 502、 在第一时间段内, 导通驱动控制电路输出高电平, 使液晶 分子产生小角度偏转, 并釆用第一光照强度的紫外线光源对液晶盒进行照 射, 使可光或者热聚合的聚合物单体开始聚合;
步骤 503、 在第二时间段内, 导通驱动控制电路输出高电平, 并采用 第二光照强度的紫外线光源对液晶盒进行照射;
步骤 504、 在第三时间段内, 导通驱动控制电路输出低电平, 并釆用 第四光照强度的紫外线光源对液晶盒进行照射;
步骤 505、 在第四时间段内, 断开驱动控制电路, 并采用第三光照强 度的紫外线光源对液晶盒进行照射, 使得可光或者热聚合的聚合物单体充 分聚合。
9、 如权利要求 8 所述的液晶分子预倾角的设置方法, 其中, 所述第 一时间段 <第二时间段 <第四时间段 <第三时间段。
10、 一种液晶分子预倾角的设置方法, 包括以下步骤:
步骤 1、 提供液晶材料、 CF基板及 TFT基板;
步骤 2、 将 CF基板与所述 TFT基板平行设置形成一容置间隙, 并将 液晶材料填充于该容置间隙中, 形成液晶盒;
步骤 3、 提供一种可产生多种驱动电压的驱动控制电路, 将该驱动控 制电路与 TFT基板电性连接;
步骤 4、 提供一小幅震荡装置及一照射强度可变的紫外线光源, 将所 述液晶盒置于所述小幅振动装置上;
步驟 5、 启动小幅振荡装置, 使液晶盒产生小幅度振荡, 导通驱动控 制电路, 采用多种驱动电压驱动液晶材料, 在此过程中, 通过紫外线光源 对液晶盒进行不同强度的紫外线照射;
步骤 6、 对所述液晶盒进行不少于一次的步骤 5 操作, 完成预倾角的 设置;
其中, 所述 TFT基板上设有遮光图案;
其中, 所述液晶材料包括: 可光或者热聚合的聚合物单体及液晶分 子, 所述可光或者热聚合的聚合物单体在紫外线光源照射下聚合;
其中, 所述驱动控制电路驱动所述液晶材料中的液晶分子偏转, 所述 液晶分子在所述驱动电路无驱动电压时, 垂直于所述 CF基板或者 TFT基 板;
其中, 所述步骤 5 小幅震荡装置使液晶盒产生小幅震荡, 该小幅震荡 的强度不足以改变液晶分子的偏转角度, 也不足以使液晶分子产生大幅度 的流动;
其中, 所述驱动控制电路产生高、 低电平, 所述高电平使得液晶分子 产生小角度的偏转, 所述低电平不足以使得液晶分子产生小角度偏转; 其中, 所述紫外线光源产生第一、 第二、 第三及第四光照强度, 所述 第一光照强度〉第二光照强度 >第三光照强度〉第四光照强度;
其中, 所述步骤 5包括以下步骤:
步骤 501、 启动小幅度震荡装置, 使得液晶盒产生小幅度振荡; 步骤 502、 在第一时间段内, 导通驱动控制电路输出高电平, 使液晶 分子产生小角度偏转, 并釆用第一光照强度的紫外线光源对液晶盒进行照 射, 使可光或者热聚合的聚合物单体开始聚合;
步骤 503、 在第二时间段内, 导通驱动控制电路输出高电平, 并采用 第二光照强度的紫外线光源对液晶盒进行照射;
步骤 504、 在第三时间段内, 导通驱动控制电路输出低电平, 并采用 第四光照强度的紫外线光源对液晶盒进行照射;
步骤 505、 在第四时间段内, 断开驱动控制电路, 并采用第三光照强 度的紫外线光源对液晶盒进行照射, 使得可光或者热聚合的聚合物单体充 分聚合;
其中, 所述第一时间段 <第二时间段 <第四时间段〈第三时间段。
PCT/CN2012/084856 2012-11-14 2012-11-20 液晶分子预倾角的设置方法 Ceased WO2014075322A1 (zh)

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