WO2016165258A1 - 一种液晶盒及其制作方法和显示装置 - Google Patents

一种液晶盒及其制作方法和显示装置 Download PDF

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WO2016165258A1
WO2016165258A1 PCT/CN2015/087774 CN2015087774W WO2016165258A1 WO 2016165258 A1 WO2016165258 A1 WO 2016165258A1 CN 2015087774 W CN2015087774 W CN 2015087774W WO 2016165258 A1 WO2016165258 A1 WO 2016165258A1
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liquid crystal
ferroferric oxide
crystal cell
oxide nanoparticles
crystal layer
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PCT/CN2015/087774
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English (en)
French (fr)
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武晓娟
袁洪亮
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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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Priority to US14/913,308 priority Critical patent/US20170059959A1/en
Publication of WO2016165258A1 publication Critical patent/WO2016165258A1/zh

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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/29—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 position or the direction of light beams, i.e. deflection
    • G02F1/292—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 position or the direction of light beams, i.e. deflection by controlled diffraction or phased-array beam steering
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K19/00—Liquid crystal materials
    • C09K19/52—Liquid crystal materials characterised by components which are not liquid crystals, e.g. additives with special physical aspect: solvents, solid particles
    • C09K19/54—Additives having no specific mesophase characterised by their chemical composition
    • C09K19/56—Aligning agents
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K19/00—Liquid crystal materials
    • C09K19/52—Liquid crystal materials characterised by components which are not liquid crystals, e.g. additives with special physical aspect: solvents, solid particles
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B30/00—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images
    • G02B30/20—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes
    • G02B30/26—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type
    • G02B30/27—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type involving lenticular arrays
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B30/00—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images
    • G02B30/20—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes
    • G02B30/26—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type
    • G02B30/27—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type involving lenticular arrays
    • G02B30/28—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type involving lenticular arrays involving active lenticular arrays
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B30/00—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images
    • G02B30/20—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes
    • G02B30/26—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type
    • G02B30/30—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type involving parallax barriers
    • G02B30/31—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type involving parallax barriers involving active parallax barriers
    • 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
    • G02F1/135—Liquid crystal cells structurally associated with a photoconducting or a ferro-electric layer, the properties of which can be optically or electrically varied
    • 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
    • G02F1/29—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 position or the direction of light beams, i.e. deflection
    • G02F1/294—Variable focal length devices
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F2202/00—Materials and properties
    • G02F2202/16—Materials and properties conductive
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F2202/00—Materials and properties
    • G02F2202/36—Micro- or nanomaterials
    • 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
    • G02F2203/00—Function characteristic
    • G02F2203/24—Function characteristic beam steering

Definitions

  • the present invention relates to the field of display technologies, and in particular, to a liquid crystal cell, a manufacturing method thereof, and a display device.
  • LCD monitors have become more and more widely used in modern life, such as mobile phone display, Note Book display, GPS display, LCD TV display and so on.
  • the conventional display can only display flat images, it has been unable to meet the requirements of display quality.
  • the 3D display has been widely studied in recent years because it can make the picture stereoscopic, the image is no longer limited to the plane of the screen, and the immersive feeling is viewed.
  • the 3D display device can be mainly divided into two types: a wearable glasses type and a naked eye type, wherein the glasses-type 3D display device needs to wear a specific 3D glasses when viewing, and if the 3D glasses are not worn, on the 3D display device.
  • the image seen is a blurred image; the naked-eye 3D display has been widely used because it does not need to wear glasses and is convenient to use.
  • the naked-eye 3D liquid crystal display can be divided into a liquid crystal grating type and a lens type naked-eye 3D liquid crystal display. Both of these methods can realize the switching of the 2D and 3D modes by applying a voltage to the liquid crystal electrode, and by controlling the magnitude of the applied voltage. The left and right eyes receive the correct image.
  • the response time is not fast enough due to the large viscosity coefficient of the liquid crystal during the dynamic switching of the applied voltage, so that the viewer can feel the obvious optics during the viewing of the image. Changes such as 3D crosstalk and image jitter.
  • An object of the present invention is to provide a liquid crystal cell, a method of fabricating the same, and a display device to overcome the above problems due to a large viscosity coefficient of liquid crystal.
  • a liquid crystal cell comprising: two substrates; and a liquid crystal layer between the two substrates and provided with ferroferric oxide nanoparticles.
  • the mass ratio of the ferroferric oxide nanoparticles in the liquid crystal layer is 1-10%.
  • the liquid crystal cell is one of a liquid crystal grating, a liquid crystal lens or a liquid crystal prism.
  • the liquid crystal cell further includes a photosensitive coupling component for detecting a change in the position of the observer's human eye.
  • the ferroferric oxide nanoparticles are ferroferric oxide nanoparticles modified with oleic acid.
  • the mass ratio of the ferroferric oxide nanoparticles modified with oleic acid in the liquid crystal layer is 1-15%.
  • a display device includes: a display panel and the above-described liquid crystal cell, wherein the liquid crystal cell is disposed on a light exiting side of the display panel.
  • the display device is operable in a 2D display mode or a 3D display mode, wherein the 2D/3D display mode is switched by controlling the deflection of the liquid crystal in the liquid crystal layer of the liquid crystal cell.
  • a method of fabricating a liquid crystal cell includes: providing two substrates; and forming a liquid crystal layer between the two substrates, wherein the liquid crystal layer is filled with ferroferric oxide nanoparticles.
  • the present invention is based on the idea of greatly reducing the viscosity coefficient of a liquid crystal by adding a ferroferric oxide nanoparticle which can generate heat under a voltage in a liquid crystal layer of a liquid crystal cell, thereby improving the response speed of the liquid crystal cell.
  • FIG. 1 shows a schematic structural view of a liquid crystal cell according to an embodiment of the present invention
  • FIG. 2(a) is a schematic view showing a state in which a human eye faces a screen in a case where the liquid crystal cell is a liquid crystal grating;
  • 2(b) is a view showing a state in which the human eye views the screen at a position after the movement in the case where the liquid crystal cell is a liquid crystal grating;
  • 3(a) is a schematic view showing a state in which a human eye views a screen from an angle in a case where the liquid crystal cell is a liquid crystal lens;
  • 3(b) is a schematic view showing a state in which the human eye views the screen from another angle in the case where the liquid crystal cell is a liquid crystal lens;
  • FIG. 4 is a graph showing a time required for a temperature rise of 2 ° C of a liquid crystal layer to which 1 wt% of ferroferric oxide nanoparticles is added, as a function of voltage frequency, at a fixed voltage of 4.0 V;
  • FIG. 5 is a graph showing a time required for a temperature rise of 2 ° C of a liquid crystal layer to which 1 wt% of ferroferric oxide nanoparticles are added at a fixed applied voltage frequency of 900 kHz, and a voltage;
  • Figure 6 shows a flow chart of a method of fabricating a liquid crystal cell in accordance with one embodiment of the present invention.
  • the liquid crystal cell includes two substrates 31 and 33 and a liquid crystal layer 32 between the two substrates, wherein the liquid crystal layer 32 is provided with ferroferric oxide nanoparticles 320.
  • the 2D and 3D display modes can also be switched by controlling the deflection of the liquid crystal in the liquid crystal layer 32.
  • ferroferric oxide nanoparticles 320 are added to the liquid crystal layer 32.
  • the ferroferric oxide nanoparticles 320 Under a high frequency electric field, the ferroferric oxide nanoparticles 320 have a thermal effect, that is, convert electromagnetic energy into heat energy. Thus, under the action of the voltage, the ferroferric oxide nanoparticles 320 cause the temperature in the liquid crystal layer 32 to rise, causing the viscosity coefficient of the liquid crystal 321 in the liquid crystal layer 32 to decrease and thus the response time of the liquid crystal 321 to be reduced. Therefore, the response speed of the liquid crystal cell is improved.
  • the mass ratio of the ferroferric oxide nanoparticles 320 in the liquid crystal layer 32 is 1-10%. If the mass ratio of the ferroferric oxide nanoparticles 320 in the liquid crystal layer 32 is too low, the thermal effect of the ferroferric oxide nanoparticles 320 is not exerted, and the viscosity coefficient of the liquid crystal is not improved; if the ferroferric oxide nanoparticles are The mass ratio of 320 in the liquid crystal layer 32 is too high, which affects the viscosity properties of the liquid crystal itself and increases the production cost.
  • the liquid crystal cell can operate as one of a liquid crystal grating, a liquid crystal lens or a liquid crystal prism (discussed below).
  • the liquid crystal cell may further include a photosensitive coupling assembly (not shown).
  • the photosensitive coupling assembly is an integrated circuit that is integrated on the liquid crystal cell for detecting changes in the position of the viewer's human eye (e.g., using line-of-sight tracking techniques).
  • the photosensitive coupling assembly may be integrated in a peripheral region of the substrate 33 of the liquid crystal cell; of course, it may be integrated in other regions that can detect changes in the position of the human eye.
  • FIG. 2(a) is a schematic view showing a state in which the human eye faces the screen in the case where the liquid crystal cell is a liquid crystal grating
  • FIG. 2(b) shows a position in which the human eye is moved after the liquid crystal cell is a liquid crystal grating.
  • the liquid crystal grating 3A is disposed on the light-emitting surface of the display panel 2A, and the effect of 3D display at different viewing positions is achieved by the movement of the light-transmitting region and the opaque region.
  • the voltage of the liquid crystal electrode can be changed according to the change information of the position of the human eye detected by the photosensitive coupling component to realize the movement of the light transmitting region and the opaque region of the liquid crystal grating 3A, so that the left and right eyes are moved.
  • the location can also receive the correct image. As shown in FIG.
  • the photosensitive coupling component detects the position of the human eye, and the light blocking area of the liquid crystal grating 3A is as shown in the shaded portion of the figure, so that the left and right eyes can receive the correct one. image.
  • the photosensitive coupling component detects a change in the position of the human eye, and the applied voltage of the liquid crystal electrode is correspondingly changed to move the liquid crystal light blocking region to the left, as shown in FIG. 2(b). The observer's left and right eyes still receive the correct image.
  • FIG. 3(a) is a schematic view showing a state in which the human eye views the screen from one angle in the case where the liquid crystal cell is a liquid crystal lens
  • FIG. 3(b) shows the human eye from the other case in the case where the liquid crystal cell is a liquid crystal lens.
  • the liquid crystal lens 3B is disposed on the light exiting side of the display panel, wherein the liquid crystal layer of the liquid crystal lens 3B contains ferroferric oxide nanoparticles.
  • the ferroferric oxide nanoparticles in the liquid crystal layer of the liquid crystal lens convert electromagnetic energy into heat energy to raise the temperature of the liquid crystal at the applied voltage, which causes the viscosity coefficient of the liquid crystal to decrease, and thus the response of the liquid crystal The time is reduced.
  • this can improve the response speed of the display device and improve the display effect (for example, avoiding the occurrence of crosstalk and image shake).
  • the liquid crystal cell can also function as a liquid crystal prism which is formed by forming a prism shape under the control of the electrode voltage by the liquid crystal in the liquid crystal layer.
  • the voltage applied to the liquid crystal electrode By controlling the voltage applied to the liquid crystal electrode to change the orientation of the liquid crystal, liquid crystals of different orientations in different regions can be formed into ribs. mirror. Since the refraction of light is different at different positions, by adjusting the transmitted or opaque state of the light, the left and right eyes can receive different light (ie, image information) to realize 3D display.
  • the thermal effect of the liquid crystal electrode layer to which the ferroferric oxide nanoparticles are added can be adjusted by changing the content of the ferroferric oxide nanoparticles, the frequency, size, and the like of the applied voltage.
  • Fig. 4 is a graph showing the time required for the temperature of the liquid crystal layer to which the 1% ferroferric oxide nanoparticle was added to rise by 2 ° C as a function of voltage frequency at a fixed voltage of 4.0 V. It can be seen from the figure that the higher the frequency of the applied voltage, the shorter the time required for the temperature of the liquid crystal layer to rise by 2 ° C, that is, the frequency of the voltage applied to the liquid crystal electrode can be adjusted to adjust the addition of the ferroferric oxide nanoparticles. The thermal effect of the liquid crystal layer.
  • Fig. 5 is a graph showing the time required for the temperature of the liquid crystal layer to which the 1% ferroferric oxide nanoparticle was added to rise by 2 ° C as a function of voltage when the applied voltage was fixed at 900 kHz. It can be seen from the figure that the larger the applied voltage, the shorter the time required for the temperature of the liquid crystal layer to rise by 2 ° C, that is, the liquid crystal to which the ferroferric oxide nanoparticles are added can be adjusted by adjusting the voltage applied to the liquid crystal electrode. The thermal effect of the layer.
  • ferroferric oxide nanoparticles used in the present embodiment may be modified with oleic acid. Modification refers to the formation of a layer of material on the surface of a nanoparticle by chemical or physical reaction to improve the dispersibility of the nanoparticle. In practical applications, it has been found that the use of oleic acid-modified ferroferric oxide nanoparticles can effectively improve the dispersibility and thus is not easy to agglomerate. This allows the temperature change of the liquid crystal at the applied voltage to be more uniform, the amplitude of the liquid crystal viscosity coefficient to be more uniform, and thus the response time to be uniformly lowered.
  • the mass ratio of the oleic acid-modified ferroferric oxide nanoparticles in the liquid crystal layer may be 1-15%.
  • the present embodiment provides a liquid crystal cell comprising two substrates and a liquid crystal layer between the two substrates, wherein the liquid crystal layer further adds a ferroferric oxide nanoparticle having a mass ratio of 1%.
  • the liquid crystal cell operates as a liquid crystal grating.
  • the ferroferric oxide nanoparticles convert electromagnetic energy into heat energy, causing the temperature of the liquid crystal at the applied voltage to rise, resulting in a decrease in the viscosity coefficient of the liquid crystal, and thus the response time of the liquid crystal is reduced.
  • this can improve the response speed of the display device. And improve the display effect (for example, to avoid crosstalk and image jitter).
  • the present embodiment provides a liquid crystal cell comprising two substrates and a liquid crystal layer between the two substrates, wherein the liquid crystal layer further has a ferroferric oxide nanoparticle having a mass ratio of 5%.
  • the liquid crystal cell operates as a liquid crystal lens.
  • the ferroferric oxide nanoparticles convert electromagnetic energy into heat energy, causing the temperature of the liquid crystal at the applied voltage to rise, resulting in a decrease in the viscosity coefficient of the liquid crystal, and thus the response time of the liquid crystal is reduced.
  • this can improve the response speed of the display device and improve the display effect (for example, avoiding the occurrence of crosstalk and image shake).
  • the present embodiment provides a liquid crystal cell comprising two substrates and a liquid crystal layer between the two substrates, wherein the liquid crystal layer is further added with an oleic acid-modified osmium trioxide having a mass ratio of 10%. Iron nanoparticles.
  • the liquid crystal cell operates as a liquid crystal prism.
  • the ferroferric oxide nanoparticles convert electromagnetic energy into heat energy, causing the temperature of the liquid crystal at the applied voltage to rise, resulting in a decrease in the viscosity coefficient of the liquid crystal, and thus the response time of the liquid crystal is reduced.
  • this can improve the response speed of the display device and improve the display effect (for example, avoiding the occurrence of crosstalk and image shake).
  • Figure 6 shows a flow chart of a method of fabricating a liquid crystal cell in accordance with one embodiment of the present invention. As shown in FIG. 6, the method includes:
  • Step S1 providing two substrates
  • step S2 a liquid crystal layer is formed between the two substrates, and the ferroferric oxide nanoparticles are added to the liquid crystal layer.
  • the deflection of the liquid crystal in the liquid crystal layer can be controlled to switch between the 2D and 3D display modes.
  • adding the ferroferric oxide nanoparticles to the liquid crystal layer may include adding the ferroferric oxide nanoparticles before the liquid crystal is defoamed, and then stirring to uniformly distribute the liquid crystal in the liquid crystal.
  • a display device comprising the above-described liquid crystal cell and display panel, which is disposed on a light exiting side of the display panel.
  • the display device can be an electronic product such as a mobile phone, a tablet computer, a liquid crystal display, or an e-book.

Abstract

一种液晶盒及其制作方法和显示装置。该液晶盒包括：两个基板（31，33）；以及液晶层（32），所述液晶层（32）位于所述两个基板（31，33）之间并且设有四氧化三铁纳米粒子（320）。通过在液晶层（32）中添加在电压作用下可以产生热量的四氧化三铁纳米粒子（320），大幅降低了液晶（321）的粘滞系数。

Description

一种液晶盒及其制作方法和显示装置 技术领域
本发明涉及显示技术领域，尤其涉及一种液晶盒及其制作方法和显示装置。
背景技术
液晶显示器在现代生活中有着越来越广泛的应用，如手机显示屏、Note Book显示屏、GPS显示屏、LCD TV显示屏等。随着科学技术的进步，由于传统显示器只能显示平面图像，已不能满足人们对显示品质的要求。3D显示器由于可以使画面变得立体逼真、图像不再局限于屏幕的平面、使观看着有身临其境的感觉，近年来被广泛研究。
3D显示装置主要可分为戴眼镜式和裸眼式两种，其中戴眼镜式的3D显示装置在观看时都需要配戴特定的3D眼镜，并且若没有配戴3D眼镜，则在3D显示装置上看到的影像为模糊影像；裸眼3D显示器由于无需佩戴眼镜、使用方便等特点得到了广泛的应用。
裸眼3D液晶显示器可分为液晶光栅式和透镜式裸眼3D液晶显示器，这两种方式都可以通过对液晶电极施加电压与否来实现2D与3D模式的切换，并通过控制施加电压的大小使人的左右眼接收到正确的影像。但上述的裸眼3D液晶显示器中的液晶膜层在施加电压动态切换过程中，由于液晶的粘滞系数较大的原因导致响应时间不够快，会使观看者在观看影像过程中感受到明显的光学变化，如3D串扰和影像抖动等现象。
发明内容
本发明的目的在于提供一种液晶盒及其制作方法和显示装置，以克服由于液晶的粘滞系数较大导致的上述问题。
根据本发明的一方面，提供一种液晶盒，包括：两个基板；以及液晶层，所述液晶层位于所述两个基板之间并且设有四氧化三铁纳米粒子。
优选地，所述四氧化三铁纳米粒子在所述液晶层中的质量比为1-10％。
优选地，所述液晶盒为液晶光栅、液晶透镜或液晶棱镜中的一种。
优选地，所述液晶盒还包括感光耦合组件，用来检测观察者人眼位置的变化。
优选地，所述四氧化三铁纳米粒子为用油酸修饰过的四氧化三铁纳米粒子。
优选地，用油酸修饰过的所述四氧化三铁纳米粒子在所述液晶层中的质量比为1-15％。
根据本发明的另一方面，提供一种显示装置，包括：显示面板和上述的液晶盒，所述液晶盒设置于所述显示面板的出光侧。
优选地，所述显示装置可工作于2D显示模式或3D显示模式，其中，通过控制所述液晶盒的液晶层中的液晶的偏转来切换2D/3D显示模式。
根据本发明的再一方面，提供一种液晶盒的制作方法，包括：提供两个基板；以及在两个基板之间形成液晶层，所述液晶层中添加有四氧化三铁纳米粒子。
本发明基于以下思想：通过在液晶盒的液晶层中添加在电压作用下可以产生热量的四氧化三铁纳米粒子，大幅降低液晶的粘滞系数，从而提高液晶盒的响应速度。
附图说明
图1示出根据本发明的一个实施例的液晶盒的结构示意图；
图2(a)示出在液晶盒为液晶光栅的情况下人眼正视屏幕的状态的示意图；
图2(b)示出在液晶盒为液晶光栅的情况下人眼在移动后的位置观看屏幕的状态的示意图；
图3(a)示出在液晶盒为液晶透镜的情况下人眼从一个角度观看屏幕的状态的示意图；
图3(b)示出在液晶盒为液晶透镜的情况下人眼从另一个角度观看屏幕的状态的示意图；
图4示出固定电压4.0V时，添加有1wt％四氧化三铁纳米粒子的液晶层温度升高2℃所需要的时间随电压频率的变化曲线；
图5示出固定施加电压频率为900KHz时，添加有1wt％四氧化三铁纳米粒子的液晶层温度升高2℃所需要的时间随电压大小的变化曲线；以及
图6示出根据本发明的一个实施例的液晶盒的制作方法的流程图。
具体实施方式
下面结合附图和实施例，对本发明的具体实施方式作进一步详细描述。以下实施例用于说明本发明，但不用来限制本发明的范围。
图1示出根据本发明的一个实施例的液晶盒的结构示意图。如图1所示，所述液晶盒包括两个基板31和33以及位于所述两个基板之间的液晶层32，其中，所述液晶层32中设有四氧化三铁纳米粒子320。通过控制施加于所述液晶层32的电压的大小可以使人的左右眼接收到正确的影像。在一个裸眼3D液晶显示装置的应用中，还可以通过控制液晶层32中的液晶的偏转来切换2D和3D显示模式。特别地，在所述液晶层32中添加四氧化三铁纳米粒子320。在高频电场下，四氧化三铁纳米粒子320具有热效应，即，将电磁能转化为热能。这样，在电压作用下，四氧化三铁纳米粒子320会使液晶层32中的温度升高，导致液晶层32中的液晶321的粘滞系数降低并且因此液晶321的响应时间减小。因此，提高了液晶盒的响应速度。
在实际应用中，为了更好地发挥四氧化三铁纳米粒子320在液晶层32中的热效应，优选地四氧化三铁纳米粒子320在所述液晶层32中的质量比为1-10％。若四氧化三铁纳米粒子320在液晶层32中的质量比过低，则发挥不出四氧化三铁纳米粒子320的热效应，其改善液晶的粘滞系数不明显；若四氧化三铁纳米粒子320在液晶层32中的质量比过高，则会影响液晶自身粘度性能，并且加大生产成本。
在本实施例中，液晶盒可以作为液晶光栅、液晶透镜或液晶棱镜中的一种而工作(下面讨论)。
该液晶盒还可以包括感光耦合组件(图中未示出)。该感光耦合组件为一集成电路，其集成在液晶盒上，用来(例如，使用视线跟踪技术)检测观察者人眼位置的变化。具体地，所述感光耦合组件可以集成在液晶盒的基板33的周边区域；当然，也可以集成在其他可实现检测人眼位置变化的区域。
图2(a)示出在液晶盒为液晶光栅的情况下人眼正视屏幕的状态的示意图，并且图2(b)示出在液晶盒为液晶光栅的情况下人眼在移动后的位置观看屏幕的状态的示意图。当液晶盒作为液晶光栅工作时，可以通过控制施加到液晶电极的电压来实现液晶层的挡光效果。在裸眼3D液晶显示装置的应用中，还可以通过施加电压与否来实现2D与3D模式的切换。参考图2(a)和2(b)，将液晶光栅3A设置在显示面板2A的出光面上，通过透光区域和不透光区域的移动来达到在不同观看位置处的3D显示的效果。当眼睛移动时，可以根据感光耦合组件侦测到的人眼位置的变化信息改变液晶电极的电压来实现液晶光栅3A的透光区域和不透光区域的移动，从而使左右眼在移动后的位置也能接收到正确的影像。如图2(a)所示，当人眼正视屏幕时，感光耦合组件侦测到人眼的位置，液晶光栅3A的挡光区域如图中阴影部分所示，使得左右眼可以接收到正确的影像。当人眼向左移动时，感光耦合组件侦测到人眼位置的变化，并且施加的液晶电极的电压被对应地改变以将液晶挡光区域向左移动，如图2(b)所示，使得观察者的左右眼仍然接收到正确的影像。
图3(a)示出在液晶盒为液晶透镜的情况下人眼从一个角度观看屏幕的状态的示意图，并且图3(b)示出在液晶盒为液晶透镜的情况下人眼从另一个角度观看屏幕的状态的示意图。当液晶盒作为液晶透镜工作时，通过控制施加到液晶电极的电压来改变液晶取向，使不同区域不同取向的液晶形成透镜，起到透镜聚光的作用。在这种情况下，单个透镜下的左右眼信号可以透过透镜分别传送到人的左右眼，从而实现3D效果的显示。参考图3(a)和3(b)，液晶透镜3B设置在显示面板的出光侧，其中液晶透镜3B的液晶层中含有四氧化三铁纳米粒子。当施加电压时，液晶透镜的液晶层中的四氧化三铁纳米粒子将电磁能转化为热能，以使施加电压处的液晶温度升高，这导致液晶的粘滞系数降低，并且因此液晶的响应时间减小。在裸眼3D显示装置的应用中，这可以提高显示装置的响应速度，改善显示效果(例如，避免串扰和影像抖动的发生)。
另外，该液晶盒还可以作为液晶棱镜工作，所述液晶棱镜由液晶层中的液晶在电极电压控制下形成棱镜状形成。通过控制施加到液晶电极的电压来改变液晶取向，可以使不同区域不同取向的液晶形成棱 镜。由于不同位置对光的折射不同，通过调节光的透过或不透过的状态，可以使左右眼接收到不同的光线(即图像信息)，实现3D显示。
一般地，添加有四氧化三铁纳米粒子的液晶电极层的热效应可以通过改变四氧化三铁纳米粒子的含量、施加电压的频率、大小等来调节。
图4示出固定电压4.0V时，添加有1％四氧化三铁纳米粒子的液晶层温度升高2℃所需要的时间随电压频率的变化曲线。从图中可以看出，施加电压频率越大，液晶层温度升高2℃所需要的时间越短，即可以通过调节施加于液晶电极的电压频率，来调节添加有四氧化三铁纳米粒子的液晶层的热效应。
图5示出固定施加电压频率为900KHz时，添加有1％四氧化三铁纳米粒子的液晶层温度升高2℃所需要的时间随电压大小的变化曲线。从图中可以看出，施加电压越大，液晶层温度升高2℃所需要的时间越短，即可以通过调节施加于液晶电极的电压大小，来调节添加有四氧化三铁纳米粒子的液晶层的热效应。
需要说明的是，本实施例中使用的四氧化三铁纳米粒子可以使用油酸修饰。修饰是指通过化学或物理反应，在纳米粒子表面形成一层物质，改善纳米粒子的分散性。在实际应用中发现，利用油酸修饰过的四氧化三铁纳米粒子，可有效提高分散性，从而不容易团聚。这允许施加电压处的液晶的温度变化更均匀，液晶粘滞系数下降的幅度更均匀，并且因此响应时间均匀地下降。由于用油酸修饰后的四氧化三铁纳米粒子不容易发生团聚，所以可以添加更多的这样的粒子。在本实施例中，优选地被油酸修饰的四氧化三铁纳米粒子在液晶层中的质量比可以为1-15％。
实施例1
本实施例提供一种液晶盒，包括两个基板以及位于所述两个基板之间的液晶层，其中，所述液晶层中还添加有质量比为1％的四氧化三铁纳米粒子。
本实施例中，液晶盒作为液晶光栅工作。当在两个基板上施加电压时，四氧化三铁纳米粒子将电磁能转化为热能，使施加电压处的液晶的温度升高，导致液晶的粘滞系数降低，并且因此液晶的响应时间减小。在裸眼3D显示装置的应用中，这可以提高显示装置的响应速度， 并且改善显示效果(例如，避免串扰和影像抖动的发生)。
实施例2
本实施例提供一种液晶盒，包括两个基板以及位于所述两个基板之间的液晶层，其中，所述液晶层中还添加有质量比为5％的四氧化三铁纳米粒子。
本实施例中，液晶盒作为液晶透镜工作。当施加电压时，四氧化三铁纳米粒子将电磁能转化为热能，使施加电压处的液晶的温度升高，导致液晶的粘滞系数降低，并且因此液晶的响应时间减小。在裸眼3D显示装置的应用中，这可以提高显示装置的响应速度，并且改善显示效果(例如，避免串扰和影像抖动的发生)。
实施例3
本实施例提供一种液晶盒，包括两个基板以及位于所述两个基板之间的液晶层，其中，所述液晶层中还添加有质量比为10％的经过油酸修饰的四氧化三铁纳米粒子。
本实施例中，液晶盒作为液晶棱镜工作。当施加电压时，四氧化三铁纳米粒子将电磁能转化为热能，使施加电压处的液晶的温度升高，导致液晶的粘滞系数降低，并且因此液晶的响应时间减小。在裸眼3D显示装置的应用中，这可以提高显示装置的响应速度，并且改善显示效果(例如，避免串扰和影像抖动的发生)。
图6示出根据本发明的一个实施例的液晶盒的制作方法的流程图。如图6所示，所述方法包括：
步骤S1、提供两个基板；
步骤S2、在两个基板之间形成液晶层，所述液晶层中添加有四氧化三铁纳米粒子。
在裸眼3D显示装置的应用中，液晶层中的液晶的偏转可以被控制来切换2D和3D显示模式。
在一个示例中，向液晶层中添加四氧化三铁纳米粒子可以包括：在液晶脱泡之前加入四氧化三铁纳米粒子，然后搅拌使其均匀分布在液晶中。
虽然根据本发明实施例的液晶盒的制作方法的各个操作在附图中被描绘为按照特定的顺序，但是这不应理解为要求这些操作必须以所示的特定顺序或者按顺行次序执行，也不应理解为要求必须执行所有 示出的操作以获得期望的结果。例如，可以在两个基板之间形成液晶层之前或之后向液晶层中添加四氧化三铁纳米粒子。
另外，根据本发明的另一方面，提供一种显示装置，包括上述的液晶盒和显示面板，该液晶盒设置在显示面板的出光侧。该显示装置可以为手机、平板电脑、液晶显示器、电子书等电子产品。
以上所述仅是本发明的优选实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本发明技术原理的前提下，还可以做出若干改进和替换，这些改进和替换也应视为落入本发明的保护范围。

Claims (9)

  1. 一种液晶盒，包括：
    两个基板；以及
    液晶层，所述液晶层位于所述两个基板之间并且设有四氧化三铁纳米粒子。
  2. 如权利要求1所述的液晶盒，其中，所述四氧化三铁纳米粒子在所述液晶层中的质量比为1-10％。
  3. 如权利要求1所述的液晶盒，其中，所述液晶盒为液晶光栅、液晶透镜或液晶棱镜中的一种。
  4. 如权利要求3所述的液晶盒，其中，还包括感光耦合组件，用来检测观察者人眼位置的变化。
  5. 如权利要求1所述的液晶盒，其中，所述四氧化三铁纳米粒子为用油酸修饰过的四氧化三铁纳米粒子。
  6. 如权利要求5所述的液晶盒，其中，用油酸修饰过的所述四氧化三铁纳米粒子在所述液晶层中的质量比为1-15％。
  7. 一种显示装置，包括：显示面板和权利要求1-6任一项所述的液晶盒，所述液晶盒设置于所述显示面板的出光侧。
  8. 如权利要求7所述的显示装置，其中，所述显示装置可工作于2D显示模式或3D显示模式，其中，通过控制所述液晶盒的液晶层中的液晶的偏转来切换2D/3D显示模式。
  9. 一种液晶盒的制作方法，包括：
    提供两个基板；以及
    在两个基板之间形成液晶层，所述液晶层中添加有四氧化三铁纳米粒子。
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CN104749825A (zh) * 2015-04-16 2015-07-01 京东方科技集团股份有限公司 一种液晶盒及其制作方法、显示装置

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