WO2014059809A1 - 液晶显示装置及其控制方法 - Google Patents

液晶显示装置及其控制方法 Download PDF

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Publication number
WO2014059809A1
WO2014059809A1 PCT/CN2013/080170 CN2013080170W WO2014059809A1 WO 2014059809 A1 WO2014059809 A1 WO 2014059809A1 CN 2013080170 W CN2013080170 W CN 2013080170W WO 2014059809 A1 WO2014059809 A1 WO 2014059809A1
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Prior art keywords
liquid crystal
crystal layer
crystal display
voltage
display device
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PCT/CN2013/080170
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English (en)
French (fr)
Inventor
陈超平
楼均辉
霍思涛
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上海天马微电子有限公司
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Publication of WO2014059809A1 publication Critical patent/WO2014059809A1/zh

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Classifications

    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • 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
    • G02F1/1334Constructional arrangements; Manufacturing methods based on polymer dispersed liquid crystals, e.g. microencapsulated liquid crystals
    • 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
    • G02F1/137Devices 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 characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering
    • G02F1/13731Devices 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 characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering based on a field-induced phase transition
    • 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
    • G02F1/137Devices 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 characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering
    • G02F1/13781Devices 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 characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering using smectic liquid crystals
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00Aspects of the constitution of display devices
    • G09G2300/02Composition of display devices
    • G09G2300/023Display panel composed of stacked panels

Definitions

  • the present application claims the priority of the Chinese patent application filed on October 19, 2012, the Chinese Patent Application No. 201210403282.0, entitled “Liquid Crystal Display Device and Its Control Method", the entire contents of which are The citations are incorporated herein by reference.
  • TECHNICAL FIELD The present invention relates to the field of display technologies, and in particular, to a liquid crystal display device and a control method thereof.
  • BACKGROUND OF THE INVENTION With the rapid development of liquid crystal display technology, research on transparent display devices is actively being carried out. In addition to being able to realize image display thereon, the transparent display device can also see things behind the display screen, such transparency.
  • the display device can be applied to the house glass, the display window glass, and the like to achieve the display effect of Agumented Reality.
  • the present invention provides a liquid crystal display device and a control method thereof.
  • the liquid crystal display device provided by the present invention includes:
  • the display control panel includes: a first substrate and a second substrate disposed opposite to each other;
  • liquid crystal layer disposed between the first substrate and the second substrate
  • the liquid crystal layer is a smectic dual-frequency liquid crystal layer or a polymer dispersed liquid crystal layer.
  • the invention provides a liquid crystal display device control method, which uses the above liquid crystal display
  • the display device when the liquid crystal layer is a smectic dual-frequency liquid crystal layer, includes: providing a driving signal to the liquid crystal display panel, so that the liquid crystal display panel is normally displayed;
  • a high frequency voltage signal is applied to the smectic dual frequency liquid crystal layer to cause the display control panel to be in a gray scale transparent state.
  • Another method for controlling a liquid crystal display device according to the present invention, wherein the liquid crystal layer is a polymer dispersed liquid crystal layer, comprises:
  • the polymer dispersed liquid crystal layer applies a high voltage signal to make the display control panel transparent;
  • the polymer dispersed liquid crystal layer applies a low voltage signal to cause the display control panel to be in a gray scale transparent state.
  • the liquid crystal display device includes a display control panel, and the display control panel includes a first substrate and a second substrate disposed opposite to each other, and disposed between the first substrate and the second substrate.
  • the liquid crystal layer is respectively disposed on the electrode layer of the first substrate and the second substrate facing the liquid crystal layer, wherein the liquid crystal layer is a smectic dual-frequency liquid crystal layer or a polymer dispersed liquid crystal layer.
  • FIG. 1 is a schematic structural view of a liquid crystal display device according to the present invention
  • FIG. 2 is a schematic structural view of the liquid crystal display panel of FIG.
  • FIG. 3 is a schematic structural view of the control panel shown in FIG. 1;
  • FIG. 4 and FIG. 5 are schematic diagrams showing the state of a liquid crystal layer of a display control panel under different frequency voltages according to the present invention
  • FIG. 6 and FIG. 7 are schematic diagrams showing another state of a liquid crystal layer of a display control panel under different amplitude voltages according to the present invention.
  • FIG. 8 is a schematic structural diagram of an electrode layer of a display control panel according to the present invention
  • FIG. 9 is a schematic diagram of a reflective polarizer between a display control panel and a liquid crystal display panel according to the present invention.
  • the technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. example. All other embodiments obtained by a person skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.
  • the embodiment of the present application discloses a liquid crystal display device. As shown in FIG. 1, the liquid crystal display device includes: a liquid crystal display panel 1 and a display control panel 2. In the present embodiment and the following, only the liquid crystal display device is applied to the display window 3 as an example.
  • the liquid crystal display panel 1 is a transparent display panel. As shown in FIG. 2, the liquid crystal display panel 1 includes: a thin film transistor array substrate 11 and a color filter substrate 12 disposed opposite to each other, and a thin film transistor array substrate 11 and a color filter substrate 12 The liquid crystal layer 13 is displayed between.
  • the thickness of the color filter film in the color filter substrate 12 is thinner than that of the color filter film for general display, so that the liquid crystal display panel 1 can display the back of the liquid crystal display panel 1 more transparently.
  • the thin film transistor array base A polarizer can also be disposed on the side of the board 11 away from the side on which the liquid crystal layer 13 is displayed and the side of the color filter substrate 12 away from the display liquid crystal layer 13.
  • a polarizer having a high transmittance is used to improve the liquid crystal display panel 1
  • the transmittance of the liquid crystal display panel 1 is improved.
  • the metal lines (such as the scan lines and the data lines) in the thin film transistor array substrate 11 are narrower, so that the aperture ratio of the liquid crystal display panel 1 is higher, thereby further improving the transmittance of the liquid crystal display panel 1. .
  • the display control panel 2 includes:
  • first substrate 21 and second substrate 22 Oppositely disposed first substrate 21 and second substrate 22;
  • liquid crystal layer 23 disposed between the first substrate 21 and the second substrate 22;
  • the electrode layers 24 are disposed on the liquid crystal layer side of the first substrate 21 and the second substrate 22, respectively, and the electrode layer 24 is a transparent electrode layer, preferably an indium tin oxide electrode layer or an indium zinc oxide electrode layer.
  • the liquid crystal layer 23 is a smectic dual-frequency liquid crystal layer or a polymer dispersed liquid crystal layer, that is, the liquid crystal in the liquid crystal layer 23 is a smectic dual-frequency liquid crystal or a polymer dispersed liquid crystal.
  • the display window 3 has a cavity structure, and a backlight 31 can be disposed in the display window.
  • the backlight 31 emits light.
  • light reflected (or emitted) from other items in the display window can be sequentially transmitted through the display control panel 2 and the liquid crystal display panel 1 on the liquid crystal display panel 1 so as to be visible from outside the display window 3
  • the display shows a clear image of the items displayed within the window 3.
  • the liquid crystal display device includes a display control panel, and the display control panel includes a first substrate and a second substrate disposed opposite to each other, and disposed between the first substrate and the second substrate.
  • the liquid crystal layer is respectively disposed on the electrode layer of the first substrate and the second substrate facing the liquid crystal layer, wherein the liquid crystal layer is a smectic dual-frequency liquid crystal layer or a polymer dispersed liquid crystal layer.
  • the liquid crystal display device can utilize an external ambient light source, especially when an independent light source is disposed in the display window, such as the backlight 31, so that the backlight is not separately provided, so that the transparency of the liquid crystal display device can be improved. Reduce power consumption.
  • the liquid crystal layer in the display control panel of the liquid crystal display device is a smectic dual-frequency liquid crystal layer, that is, the liquid crystal in the liquid crystal layer is a smectic phase.
  • the dual-frequency liquid crystal preferably, the liquid crystal smectic phase A-type dual-frequency liquid crystal in the liquid crystal layer.
  • the smectic dual-frequency liquid crystal exhibits a positive liquid crystal characteristic under the action of a low frequency voltage, and has a negative liquid crystal characteristic under the action of a high frequency voltage.
  • the low frequency voltage is a voltage less than 2 KHz
  • the high The frequency voltage is a voltage greater than or equal to 2 KHz.
  • the smectic dual-frequency liquid crystal when a low frequency voltage of less than 2 KHz is applied to the display control panel, as shown in FIG. 4, the smectic dual-frequency liquid crystal exhibits positive liquid crystal characteristics, and liquid crystal molecules The long axis is parallel to the electric field under the action of the voltage, and the alignment of the liquid crystal molecules in each layer is uniform, and the structure thereof is orderly, and has little influence on the propagation direction of the light incident on the liquid crystal layer 23, that is, the display control panel is in a transparent state. At this time, the liquid crystal display panel screen can display the items displayed in the display window 3.
  • the smectic dual-frequency liquid crystal exhibits a negative liquid crystal characteristic, and the liquid crystal molecules are perpendicular to the electric field under the action of a voltage.
  • the line direction rotates, the layered ordered structure will be destroyed to form a plurality of domains of different sizes. Since the liquid crystal molecules in each domain are generally arranged in the same orientation, there is a refractive index between the domains. The difference, which will cause the incident light to experience a scattering effect after experiencing multiple inter-domain interfaces.
  • the degree of disorder of the smectic dual-frequency liquid crystal molecules can be controlled, that is, the number and size of the domains are changed, thereby controlling the degree of scattering of the light by the liquid crystal layer 23, and correspondingly controlling
  • the transmittance of the display control panel is such that gray scale transparent state control can be realized, that is, when the high frequency voltage frequency is close to 2 kHz, the display control panel has less scattering effect on light, and when the height is high, When the frequency voltage frequency reaches a certain level (for example, 50 KHz), the display control panel has a strong scattering effect on the light, and at this time, the exhibition The picture of the items in the window will be greatly affected.
  • the image signal carried by itself will be lost due to the strong scattering of light, that is, no image can be displayed.
  • the light emitted inside can be utilized to some extent as a backlight of the liquid crystal display panel, and the screen displayed by the liquid crystal display panel can also be the only screen displayed by the liquid crystal display device.
  • the liquid crystal in the smectic dual-frequency liquid crystal layer can also be controlled by adjusting the voltage amplitude applied to the display control panel.
  • the scattering effect of the molecules on the incident light thereby controlling the gray-scale transparent state of the display control panel.
  • the light emitted by the backlight in the display window and the light reflected (or emitted) by other items in the display window can simultaneously serve as the backlight of the liquid crystal display device, and the liquid crystal display device does not need to separately provide a backlight.
  • the source therefore, the power consumption of the liquid crystal display device is low.
  • the smectic dual-frequency liquid crystal has a memory effect, after the display control panel receives a voltage pulse signal, the state of the smectic dual-frequency liquid crystal can be maintained for one year or even longer. The power consumption of the liquid crystal display device can be further reduced until it is necessary to change the alignment state of the liquid crystal molecules.
  • the liquid crystal layer in the display control panel of the liquid crystal display device is a polymer dispersed liquid crystal layer, that is, the liquid crystal in the liquid crystal layer is a polymer dispersed liquid crystal. .
  • the polymer dispersed liquid crystal layer includes a polymer network and a plurality of liquid crystal particles located in the polymer network.
  • the polymer network is formed by polymerizing a polymer monomer and a photoinitiator under ultraviolet light, separated into a plurality of spatial regions, and will be located The liquid crystal molecules in different spatial regions are divided into a plurality of different domains to become liquid crystal particles.
  • the polymer monomer refers to a compound capable of undergoing a polymerization reaction to produce a relatively high molecular mass.
  • liquid crystal particles in the polymer dispersed liquid crystal are preferably nematic liquid crystal particles.
  • the long axes of the liquid crystal molecules in the liquid crystal particles are arranged along the direction of the electric field. It has a uniform liquid crystal molecular state.
  • an equivalent refractive index of the liquid crystal particles to incident light is equal to an equivalent refractive index of the polymer network to the incident light, through the liquid crystal layer 23
  • the direction of light propagation has little effect, ie the light transmitted through the display control panel does not scatter.
  • the liquid crystal display panel can display an item displayed in the display window to interact with the screen of the liquid crystal display panel and the display item in the display window.
  • the degree of scattering of the light by the liquid crystal layer 23 can be controlled, and the transmittance of the display control panel can be controlled accordingly, so that gray scale transparent state control can be realized, that is, when the low voltage is When the voltage value is close to 10V, the display control panel has less scattering effect on the light, and the picture showing the items in the window can be clearly displayed on the liquid crystal display panel, and when the low voltage voltage value is 0 or close At 0, the display control panel has a strong scattering effect on the light. At this time, when the light passes through the display control panel, the image of the item in the display window cannot be displayed, and the light emitted in the window is displayed. Can be used to some extent due to the loss of image signals As a backlight of the liquid crystal display panel, the screen displayed on the liquid crystal display panel becomes a screen uniquely displayed by the liquid crystal display device.
  • the embodiment can switch between the liquid crystal display panel screen and the display item display window, and realize the interaction between the liquid crystal display panel screen and the item screen in the display window. Thereby, the display effect of the liquid crystal display device on the items in the display window is improved.
  • the light emitted by the backlight in the display window and the light reflected (or emitted) by other items in the display window can be used as the backlight of the liquid crystal display device, and the liquid crystal display device does not need to separately set the backlight. Therefore, the power consumption of the liquid crystal display device is low.
  • Another embodiment of the present application discloses another liquid crystal display device, which is different from the above embodiment in that:
  • the electrode layer of the display control panel includes a plurality of patterned electrode regions 241 , 242 . . . , wherein the plurality of patterned electrode regions can be individually controlled, and the display is
  • the control panel can realize a part that has no influence on the transmitted light, for example, 241 is in a transparent state, so that the picture in the display window can be unaffected, and other parts of the display control panel can scatter the transmitted light, for example, 242 is a gray-scale transparent state, and the screen in the partially displayed display window is not displayed, and the light emitted from the display window is only emitted as a backlight of the liquid crystal display panel.
  • a reflective polarizer is disposed between the display control panel 2 and the liquid crystal display panel 1.
  • the thin film transistor array substrate 11 and the display control panel of the liquid crystal display panel 1 are provided.
  • the polarizer 110 is disposed between the two, and the polarizer 110 is preferably a reflective polarizer.
  • the polarizer 110 absorbs about 50% of the light, and the reflective polarizer reflects unwanted light back, thereby reusing it, thereby increasing the brightness of the liquid crystal display device.
  • the reflective polarizer of the embodiment is preferably a metal wire grid polarizer.
  • the display control panel may be an active drive display control panel, that is, through a film A display of the transistor array drive to control the switch or portion of the switch of the display control panel as a whole.
  • the display control panel can also be a passively driven display control panel.
  • the electrode layer of the display control panel may also be a full-surface electrode layer to reduce the use of the thin film transistor.
  • the liquid crystal display panel further includes a first driving circuit that provides a driving signal to the liquid crystal display panel; the display control panel further includes a second driving circuit that provides a driving signal to the display control panel.
  • the first driving circuit and the second driving circuit may be respectively disposed on different PCBs (Printed Circuit Boards), and more preferably, the first driving circuit and the second driving circuit may also be together Set on the same PCB.
  • the liquid crystal display device further includes a processor.
  • the processor controls the first driving circuit and the second driving circuit to realize synchronous display of the liquid crystal display panel and the display control panel.
  • the liquid crystal display device further includes a touch panel to facilitate human-computer interaction.
  • the touch panel may be a projected capacitive touch panel.
  • the touch panel is an in-cell embedded (In-Cell) embedded capacitive touch panel, and the touch panel may also be an external touch panel. That is, the touch panel is fixed on the side of the liquid crystal display panel facing the operator by chemical bonding or physical bonding.
  • the specific structure and arrangement based on the touch panel are known to those skilled in the art and will not be described herein.
  • liquid crystal display device on the basis of improving the display effect of the liquid crystal display device on the items displayed in the display window, part of the display of the screen in the display window can be realized, and the display brightness can be further improved to facilitate Human-computer interaction.
  • Another embodiment of the present application discloses a control method of a liquid crystal display device, which can be applied to a liquid crystal display device in which the liquid crystal layer is a smectic dual-frequency liquid crystal layer.
  • the control method includes:
  • a driving signal is provided to the liquid crystal display panel to cause the liquid crystal display panel to display normally. Applying a low frequency voltage signal to the smectic dual frequency liquid crystal layer to make the display control panel transparent. Preferably, applying a smaller amount to the electrode layer of the display control panel
  • a low frequency voltage signal of 2 kHz generates a low frequency electric field between the first substrate and the second substrate, and the low frequency voltage signal is applied to the smectic dual frequency liquid crystal layer.
  • the smectic dual-frequency liquid crystal layer exhibits a positive liquid crystal property under the action of a low-frequency voltage, and has no scattering effect on the incident light, and the liquid crystal molecules of each layer have similar states, and the structure thereof is ordered, and the transmission is displayed.
  • the direction of light propagation from the control panel has little effect.
  • the display control panel is in a transparent state, so that the liquid crystal display panel screen can interact with the screen displaying the items in the display window.
  • a high frequency voltage signal is applied to the smectic dual frequency liquid crystal layer to cause the display control panel to be in a gray scale transparent state. That is, a high frequency voltage signal greater than or equal to 2 KHz is preferably applied to the electrode layer of the display control panel, and a high frequency electric field is generated between the first substrate and the second substrate, so that the high frequency voltage signal is applied to the Said smectic dual-frequency liquid crystal layer.
  • the smectic dual-frequency liquid crystal layer exhibits a negative liquid crystal characteristic under the action of a high-frequency voltage, the display control panel is in a gray-scale transparent state, and the ordered layered structure of the smectic dual-frequency liquid crystal layer is struck. In disorder, multiple domains with different orientations of liquid crystal molecules appear, and the difference in refractive index between the domains will cause the incident light to be scattered.
  • the display control panel has less effect on scattering light, and the picture of the item displayed in the window can be clearly displayed on the liquid crystal display panel, and when the height is high
  • the frequency voltage frequency reaches a certain level (for example, 50 KHz)
  • the display control panel has a strong scattering effect on the light.
  • the screen of the item displayed in the window cannot be displayed.
  • the light emitted from the display window is completely used as the backlight of the liquid crystal display panel.
  • the screen displayed by the liquid crystal display panel becomes the only screen displayed by the liquid crystal display device.
  • the driving signal of the liquid crystal display panel and the driving signal of the display control panel need to be provided at a certain timing, that is, when the driving signal is provided to the liquid crystal display panel, the liquid crystal display panel is normally displayed, according to the background. a need for transparency to provide a corresponding drive signal to the display control panel such that the liquid crystal display panel and the The display control panel synchronizes the display to realize the interaction between the liquid crystal display panel screen and the displayed item screen in the display window.
  • the embodiment can switch between the liquid crystal display panel screen and the display item display window, and can also display the liquid crystal display panel screen and the display item display window in the display window. Thereby, the display effect of the liquid crystal display device on the items in the display window is improved.
  • Still another embodiment of the present application discloses a control method of another liquid crystal display device, which is applied to a liquid crystal display device in which the liquid crystal layer is a polymer dispersed liquid crystal layer.
  • the control method includes:
  • a driving signal is supplied to the liquid crystal display panel to cause the liquid crystal display panel to be normally displayed.
  • a high voltage signal is applied to the polymer dispersed liquid crystal layer to render the display control panel transparent. That is, a high voltage signal greater than or equal to 10 V is preferably applied to the electrode layer of the display control panel, and a high voltage electric field is generated between the first substrate and the second substrate, and the high voltage signal is applied to the polymerization. The substance is dispersed on the liquid crystal layer. Then, when a high voltage is applied to the polymer-dispersed liquid crystal layer, the long axes of the liquid crystal molecules located in the liquid crystal particles of the polymer-dispersed liquid crystal are arranged along the direction of the electric field, and have a uniform liquid crystal state.
  • the equivalent refractive index of the liquid crystal particle to the incident ray and the polymer network are opposite to the incident
  • the equivalent refractive indices of the light are equal, and the display control panel is in a transparent state with little effect on the direction of propagation of light incident on the display control panel. The interaction between the picture of the liquid crystal display panel and the picture of the item displayed in the display window is thus achieved.
  • a low voltage signal is applied to the polymer dispersed liquid crystal layer to render the display control panel in a gray scale transparent state. That is, a low voltage signal greater than or equal to zero volts and less than 10 volts is preferably applied to the electrode layer of the display control panel, and a low voltage electric field (or no electric field) is generated between the first substrate and the second substrate. Low voltage signal applied to The polymer is dispersed on the liquid crystal layer. Then, when a low voltage (including zero volt) is applied to the polymer dispersed liquid crystal layer, different liquid crystal particles are in different states.
  • the incident direction of the incident light is different from the axial direction of each liquid crystal particle, so that the equivalent refractive index of the liquid crystal particle to the incident light is not equal to the equivalent refractive index of the polymer network to the same incident light. equal. Then, light passing through the liquid crystal layer undergoes scattering after undergoing a plurality of liquid crystal particles. At this time, the display control panel is in a grayscale transparent state.
  • the display control panel When the voltage value of the low voltage signal is close to 10V, the display control panel has less effect on the scattering of light, and the picture showing the items in the window can be clearly presented on the liquid crystal display panel, and when the low When the voltage value of the voltage signal is 0V or close to 0V, the display control panel has a strong scattering effect on the light. At this time, when the light passes through the display control panel, the screen of the item displayed in the window cannot be displayed. Then, the light emitted from the display window is completely used as the backlight of the liquid crystal display panel, and the screen displayed by the liquid crystal display panel is also the only screen displayed by the transparent liquid crystal display device.
  • the driving signal of the liquid crystal display panel and the driving signal of the display control panel need to be provided at a certain timing, that is, while the driving signal is provided to the liquid crystal display panel, and the liquid crystal display panel is normally displayed. And providing a corresponding driving signal to the display control panel according to the need of background transparency to realize synchronous display of the liquid crystal display panel and the display control panel.
  • the embodiment can switch between the liquid crystal display panel screen and the display item display window, and can also display the liquid crystal display panel screen and the display item display window in the display window. Thereby, the display effect of the liquid crystal display device on the items in the display window is improved.

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Liquid Crystal (AREA)
  • Computer Hardware Design (AREA)
  • Theoretical Computer Science (AREA)
  • Dispersion Chemistry (AREA)
  • Mathematical Physics (AREA)

Abstract

一种液晶显示装置包括:液晶显示面板(1)、显示控制面板(2)。显示控制面板(2)包括:相对设置的第一基板(21)与第二基板(22);设置于第一基板(21)与第二基板(22)之间的液晶层(23);分别设置于第一基板(21)与第二基板(22)朝向液晶层(23)一侧的电极层(24);其中,液晶层(23)为近晶相双频液晶层或聚合物分散液晶层。且通过显示控制面板(2)内的液晶层(23),可以实现液晶显示面板(1)画面和后置的展示橱窗内展示物品画面的切换,还可以使液晶显示面板(1)画面和展示橱窗内展示物品画面同时显示,从而实现液晶显示装置与展示橱窗内物品的互动展示效果。

Description

液晶显示装置及其控制方法 本申请要求 2012 年 10 月 19 日提交中国专利局、 申请号为 201210403282.0、 发明名称为 "液晶显示装置及其控制方法"的中国 专利申请的优先权, 其全部内容通过引用结合在本申请中。 技术领域 本发明涉及显示技术领域,尤其涉及一种液晶显示装置及其控制 方法。 背景技术 随着液晶显示技术的飞速发展,对透明显示设备的研究也在积极 地进行, 所述透明显示设备除了能够在其上实现图像显示外, 还能够 看见显示屏后面的东西, 这样的透明显示设备可以应用于房屋玻璃、 展示橱窗玻璃等方面, 以实现增强现实 (Agumented Reality)的显示效 果。
但是, 现有的透明显示设备在用作展示橱窗玻璃时, 其对展示橱 窗内物品的显示效果并不理想。 发明内容 有鉴于此, 本发明提供了一种液晶显示装置及其控制方法。 具体的, 本发明提供的液晶显示装置, 包括:
液晶显示面板、 显示控制面板; 所述显示控制面板包括: 相对设置的第一基板与第二基板;
设置于所述第一基板与第二基板之间的液晶层;
分别设置于所述第一基板和第二基板朝向所述液晶层一侧的电 极层;
其中, 所述液晶层为近晶相双频液晶层或聚合物分散液晶层。 本发明提供的一种液晶显示装置的控制方法,应用上述的液晶显 示装置, 当所述液晶层为近晶相双频液晶层时, 包括: 给所述液晶显示面板提供驱动信号,使所述液晶显示面板正常显 示;
给所述近晶相双频液晶层施加低频电压信号,使所述显示控制面 板呈透明状态;
给所述近晶相双频液晶层施加高频电压信号,使所述显示控制面 板呈灰阶透明状态。
本发明提供的另一种液晶显示装置的控制方法,应用上述的液晶 显示装置, 当所述液晶层为聚合物分散液晶层时, 包括:
给所述液晶显示面板提供驱动信号,使所述液晶显示面板正常显 示;
所述聚合物分散液晶层施加高电压信号,使所述显示控制面板呈 透明状态;
所述聚合物分散液晶层施加低电压信号,使所述显示控制面板呈 灰阶透明状态。
由上述方案可知,本申请所提供的液晶显示装置包括显示控制面 板, 且所述显示控制面板包括相对设置的第一基板与第二基板, 设置 于所述第一基板与第二基板之间的液晶层,分别设置于所述第一基板 和第二基板朝向所述液晶层一侧的电极层, 其中, 所述液晶层为近晶 相双频液晶层或聚合物分散液晶层。 且通过显示控制面板内的液晶 层, 可以实现液晶显示面板画面和展示橱窗内展示物品画面的切换 , 还可以使所述液晶显示面板画面和展示橱窗内展示物品画面同时显 示, 从而提高所述液晶显示装置与展示橱窗内物品的互动展示效果。 附图说明 为了更清楚地说明本发明实施例或现有技术中的技术方案,下面 将对实施例或现有技术描述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为本发明所提供的一种液晶显示装置的结构示意图; 图 2为图 1中液晶显示面板的结构示意图;
图 3为图 1中显示控制面板的结构示意图;
图 4和图 5为本发明所提供的一种显示控制面板在不同频率电压 下的液晶层状态示意图;
图 6和图 7为本发明所提供的另一种显示控制面板在不同幅值电 压下的液晶层状态示意图;
图 8为本发明所提供的一种显示控制面板电极层结构示意图; 图 9 为本发明所提供的一种显示控制面板与液晶显示面板间反 射式偏光片的示意图。 具体实施方式 下面将结合本发明实施例中的附图,对本发明实施例中的技术方 案进行清楚、 完整地描述, 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。 本申请实施例公开了一种液晶显示装置, 如图 1所示, 该液晶显 示装置包括: 液晶显示面板 1和显示控制面板 2。 本实施例及以下仅 以液晶显示装置应用于展示橱窗 3为例, 进行说明。
其中,所述液晶显示面板 1为透明显示面板,如图 2所示, 包括: 相对设置的薄膜晶体管阵列基板 11和彩膜基板 12, 以及设置在 所述薄膜晶体管阵列基板 11和彩膜基板 12之间的显示液晶层 13。
其中, 所述彩膜基板 12中的彩色滤光膜的厚度比一般显示用的 彩色滤光膜更薄,以使所述液晶显示面板 1能够更加具有透明度地显 示所述液晶显示面板 1后面的画面。优选地, 所述薄膜晶体管阵列基 板 11远离显示液晶层 13的一侧和彩膜基板 12远离显示液晶层 13的 一侧还可以设置偏光片, 且优选地采用透过率较高的偏光片, 以提高 所述液晶显示面板 1的透过率,即提高所述液晶显示面板 1的透明显 示效果。 所述薄膜晶体管阵列基板 11 内的金属线(如扫描线和数据 线)较窄, 使所述液晶显示面板 1的开口率较高, 进而更进一步的提 高所述液晶显示面板 1的透过率。
如图 3所示, 所述显示控制面板 2包括:
相对设置的第一基板 21与第二基板 22;
设置于所述第一基板 21与第二基板 22之间的液晶层 23;
分别设置于所述第一基板 21和第二基板 22朝向所述液晶层一侧 的电极层 24, 所述电极层 24为透明电极层, 优选为氧化铟锡电极层 或氧化铟锌电极层。
其中,所述液晶层 23为近晶相双频液晶层或聚合物分散液晶层, 即所述液晶层 23内的液晶为近晶相双频液晶或聚合物分散液晶。
参考图 1 , 一般的, 所述展示橱窗 3呈一腔体结构, 且所述展示 橱窗内还可以设置一背光灯 31 , 在显示控制面板 2呈透明态时, 所 述背光灯 31发出的光线以及展示橱窗内其他物品 4反射(或发出) 的光线可以依次透过显示控制面板 2和液晶显示面板 1 , 在所述液晶 显示面板 1上呈现出来,从而可以从所述展示橱窗 3外看到所述展示 橱窗 3内所展示物品的清晰图像。
由上述方案可知,本申请所提供的液晶显示装置包括显示控制面 板, 且所述显示控制面板包括相对设置的第一基板与第二基板, 设置 于所述第一基板与第二基板之间的液晶层,分别设置于所述第一基板 和第二基板朝向所述液晶层一侧的电极层, 其中, 所述液晶层为近晶 相双频液晶层或聚合物分散液晶层。且通过控制显示控制面板内的液 晶层分子排列,可以实现液晶显示面板画面和展示橱窗内展示物品画 面的切换,还可以使所述液晶显示面板画面和展示橱窗内展示物品画 面同时显示,实现所述液晶显示面板与所述展示橱窗内所展示物品的 互动。 并且, 所述液晶显示装置可以利用外部环境光源, 尤其是在展 示橱窗内设独立光源的时候, 例如背光灯 31 , 就不需要单独额外设 置背光源, 从而可以提高所述液晶显示装置的透明度并降低功耗。
本申请另一实施例公开了一种具体的液晶显示装置,所述液晶显 示装置的显示控制面板内的液晶层为近晶相双频液晶层,即所述液晶 层内的液晶为近晶相双频液晶, 优选的, 所述液晶层内的液晶近晶相 A型双频液晶。
其中,所述近晶相双频液晶在低频电压作用下,呈正性液晶特性, 在高频电压作用下, 呈负性液晶特性, 优选的, 所述低频电压为小于 2KHz的电压, 所述高频电压为大于或等于 2KHz的电压。
则在本实施例所公开的显示控制面板中, 当对所述显示控制面板 施加小于 2KHz的低频电压时, 如图 4所示, 所述近晶相双频液晶呈 正性液晶特性, 液晶分子的长轴在电压的作用下平行于电场, 各层液 晶分子的排列一致, 其结构有序, 对于射入液晶层 23的光线的传播 方向几乎没有影响, 即所述显示控制面板呈透明态。 此时, 所述液晶 显示面板画面可以显示展示橱窗 3内展示的物品。
当对所述显示控制面板施加大于或等于 2KHz的高频电压时,如 图 5所示, 所述近晶相双频液晶呈负性液晶特性, 液晶分子会在电压 的作用下向垂直于电场线方向旋转,其层状的有序结构将受到破坏而 形成众多大小不一的域 (Domain), 由于每个域的液晶分子总体排列取 向都不相同, 因此域与域之间存在折射率上的差异, 该差异将导致入 射光线经历多次域间的界面后会产生散射效应。 并且, 通过调控高频 电压的频率, 可以控制所述近晶相双频液晶分子的排列混乱程度, 即 改变域的数目与大小, 进而控制所述液晶层 23对光线的散射程度, 相应地控制所述显示控制面板的透过率,使其可以实现灰阶透明态控 制, 即当所述高频电压频率接近 2KHz时, 所述显示控制面板对光线 的散射作用较小, 而当所述高频电压频率达到一定程度 (例如 50KHz) 时, 所述显示控制面板对光线的具有很强的散射作用, 此时, 所述展 示橱窗内物品的画面则会受到很大影响, 当光线通过所述显示控制面 板后, 由于光线被强烈散射的原因, 其本身携带的图像信号将丟失, 即无法显示任何影像,此时展示橱窗内发出的光线可以某种程度上被 利用作为所述液晶显示面板的背光,而所述液晶显示面板显示的画面 也会成为所述液晶显示装置唯一显示的画面。
需要说明的是, 当施加在所述显示控制面板上的电压频率一定 时, 还可以通过调控施加在所述显示控制面板上的电压幅值, 来控制 所述近晶相双频液晶层中液晶分子对入射光线的散射效果,从而控制 所述显示控制面板的灰阶透明状态。
可见, 本实施例通过控制显示控制面板内的液晶层 23 , 可以实 现液晶显示面板画面和展示橱窗内展示物品画面的切换,实现所述液 晶显示面板与展示橱窗内物品画面的互动 ,从而提高展示橱窗内物品 的展示效果。
此外,所述展示橱窗内的背光灯发出的光线和展示橱窗内其他物 品反射(或发出) 的光线可以同时作为所述液晶显示装置的背光源, 则所述液晶显示装置不需要单独额外设置背光源, 所以, 所述液晶显 示装置的功耗较低。 而且, 由于所述近晶相双频液晶具有记忆效应, 则所述显示控制面板在接收到一个电压脉冲信号后,所述近晶相双频 液晶的状态可以保持一年、 甚至更长的时间, 直至需要改变其液晶分 子排列状态为止, 从而可以进一步降低所述液晶显示装置的功耗。 所 以, 所述液晶显示面板的功耗较小, 对于当今能源紧缺的时代, 具有 重大意义。 本申请又一实施例公开了另一种具体的液晶显示装置,所述液晶 显示装置的显示控制面板内的液晶层为聚合物分散液晶层,即所述液 晶层内的液晶为聚合物分散液晶。
所述聚合物分散液晶层包括聚合物网络以及位于所述聚合物网 络中的多个液晶颗粒。 其中, 所述聚合物网络是由聚合物单体和光引 发剂在紫外光的照射下聚合形成的, 分隔为多个空间区域, 且将位于 不同空间区域内的液晶分子分割成多个不同的畴, 成为液晶颗粒。 需 要说明的是,所述聚合物单体是指能发生聚合反应而生成相对较高分 子质量的化合物。
本实施例中,所述聚合物分散液晶内的液晶颗粒优选为向列相液 晶颗粒。
如图 6所示, 在对所述聚合物分散液晶层施加一个高电压, 优选 为大于或等于 10V 的高电压时, 所述液晶颗粒内的液晶分子的长轴 均沿着电场方向排布, 其具有统一的液晶分子态。 当入射光线射入所 述聚合物分散液晶层时,所述液晶颗粒对入射光线的等效折射率与所 述聚合物网络对所述入射光线的等效折射率相等, 通过所述液晶层 23 的光线传播方向几乎没有影响, 即透过所述显示控制面板的光线 不会发生散射。 所述液晶显示面板可以显示展示橱窗内展示的物品, 使所述液晶显示面板画面与展示橱窗内展示物品的画面之间实现互 动。
如图 7所示, 在没有电场或电场强度较低时, 不同的液晶颗粒所 处的状态不同。 则在对所述聚合物分散液晶层施加一个低电压, 优选 为大于或等于零伏且小于 10V 的低压时, 由于没有施加电场或施加 电场较小, 不同的液晶颗粒所处的状态不同。 因此入射光线的入射方 向与每个液晶颗粒轴向的夹角都不相同,从而使得所述液晶颗粒对入 射光线的等效折射率与所述聚合物网络对同一入射光线的等效折射 率不相等。 则通过所述液晶层 23的光线经历多个液晶颗粒后会发生 散射。 并且, 通过调控低压的电压值, 可以控制所述液晶层 23对光 线的散射程度, 相应地控制所述显示控制面板的透过率, 使其可以实 现灰阶透明态控制, 即当所述低压的电压值接近 10V 时, 所述显示 控制面板对光线的散射作用较小,展示橱窗内物品的画面可以较清晰 的呈现在所述液晶显示面板上, 而当所述低压电压值为 0或接近于 0 时, 所述显示控制面板对光线的具有很强的散射作用, 此时, 当光线 通过所述显示控制面板后,展示橱窗内物品的画面无法被显示出, 则 展示橱窗内发出的光线由于丟失了图像信号,可以某种程度上被利用 作为所述液晶显示面板的背光, 此时, 所述液晶显示面板显示的画面 会成为所述液晶显示装置唯一显示的画面。
可见, 本实施例通过控制显示控制面板内的液晶层 23 , 可以实 现液晶显示面板画面和展示橱窗内展示物品画面的切换,实现所述液 晶显示面板画面和所述展示橱窗内物品画面的互动,从而提高所述液 晶显示装置对展示橱窗内物品的展示效果。
此外,所述展示橱窗内的背光灯发出的光线和展示橱窗内其他物 品反射(或发出)的光线可以作为所述液晶显示装置的背光, 则所述 液晶显示装置不需要单独额外设置背光源,所以所述液晶显示装置的 功耗较低。 本申请又一实施例公开了另一种液晶显示装置,与上述实施例不 同之处在于:
如图 8所示,所述显示控制面板的电极层包括多个图形化的电极 区域 241、 242 ··· ··· , 则所述多个图形化的电极区域可以单独控制, 则所述显示控制面板可以实现一部分对透过光线没有影响, 例如 241 为透明态, 使展示橱窗内的画面得以不受影响的显示, 而所述显示控 制面板的其他部分则可以使透过光线发生散射,例如 242为灰阶透明 态, 此部分遮挡的展示橱窗内画面不会显示出来, 且所述展示橱窗内 射出的光线在此部分只是作为液晶显示面板的背光射出。
如图 9所示,所述显示控制面板 2与所述液晶显示面板 1间设置 有反射式偏光片, 优选地, 结合图 2, 所述液晶显示面板 1的薄膜晶 体管阵列基板 11与显示控制面板 2之间设有的偏光片 110,且偏光片 110优选为反射式偏光片。 对于一般的偏光片而言, 其会吸收 50%左 右的光线, 而所述反射式偏光片则会把不需要的光线反射回去, 从而 重复利用, 进而增大所述液晶显示装置的亮度。 进一步地, 本实施例 所述反射式偏光片优选为金属线栅偏振片。
所述显示控制面板可以为有源驱动式显示控制面板,即通过薄膜 晶体管阵列驱动的显示,以控制所述显示控制面板整体的开关或部分 的开关。当然,所述显示控制面板还可以为无源驱动式显示控制面板。 而且, 所述显示控制面板的电极层还可以为整面的电极层, 以减少薄 膜晶体管的使用。
另外,所述液晶显示面板还包括为所述液晶显示面板提供驱动信 号的第一驱动电路;所述显示控制面板还包括为所述显示控制面板提 供驱动信号的第二驱动电路。 其中, 所述第一驱动电路和第二驱动电 路可以分别设置在不同的 PCB ( Printed Circuit Board , 印制电路板 ) 上, 更优选地, 所述第一驱动电路和第二驱动电路也可以一同设置在 同一 PCB上。
进一步地, 所述液晶显示装置还包括处理器。 所述处理器控制所 述第一驱动电路与所述第二驱动电路,以实现所述液晶显示面板和显 示控制面板的同步显示。
此外, 所述液晶显示装置还包括触摸面板, 以方便人机交互。 其 中, 所述触摸面板可以为投射电容式触摸面板, 优选的, 所述触摸面 板为盒内 (In-Cell )嵌入型投射电容式触摸面板, 此外, 所述触摸面 板还可以为外挂式触摸面板, 即通过化学贴合或物理贴合的方式, 将 所述触摸面板固定在所述液晶显示面板面向操作者的一侧。基于触摸 面板的具体结构和设置已为本领域技术人员所知, 在此就不再赘述。
本实施例所提供的液晶显示装置,在提高所述液晶显示装置对展 示橱窗内物品的展示效果的基础上,还可以实现展示橱窗内画面的部 分显示, 以及进一步的提高其显示亮度, 以方便人机交互。
本申请又一实施例公开了一种液晶显示装置的控制方法,所述控 制方法可以应用于上述液晶层为近晶相双频液晶层的液晶显示装置。
该控制方法包括:
给所述液晶显示面板提供驱动信号,使所述液晶显示面板正常显 示。 给所述近晶相双频液晶层施加低频电压信号,使所述显示控制面 板呈透明状态。 优选地, 给所述显示控制面板的电极层施加一小于
2KHz的低频电压信号, 在第一基板和第二基板之间会产生一低频电 场, 使所述低频电压信号施加到所述近晶相双频液晶层上。 此时, 所 述近晶相双频液晶层在低频电压作用下, 表现为正性液晶特性, 对入 射的光线无散射作用, 各层液晶分子的状态相似, 其结构有序, 对透 过显示控制面板的光线传播方向几乎没有影响。则所述显示控制面板 呈透明状态,使所述液晶显示面板画面可以与展示橱窗内展示物品的 画面之间实现互动。
或者, 给所述近晶相双频液晶层施加高频电压信号, 使所述显示 控制面板呈灰阶透明状态。即优选地给所述显示控制面板的电极层施 加大于或等于 2KHz的高频电压信号,在第一基板和第二基板之间会 产生一高频电场,使所述高频电压信号施加到所述近晶相双频液晶层 上。 则所述近晶相双频液晶层在高频电压作用下, 表现为负性液晶特 性, 所述显示控制面板呈灰阶透明状态, 近晶相双频液晶层的有序层 状结构被打乱, 出现多个液晶分子取向不同的域, 域间的折射率差异 将使得入射光线受到散射作用。
而且, 当所述高频电压频率接近 2KHz时, 所述显示控制面板对 光线的散射作用较小,展示橱窗内物品的画面可以较清晰的呈现在所 述液晶显示面板上, 而当所述高频电压频率达到一定程度时 (例如 50KHz ), 所述显示控制面板对光线的具有很强的散射作用, 此时, 当光线射入所述显示控制面板后,展示橱窗内物品的画面无法被显示 出, 则展示橱窗内发出的光线完全作为所述液晶显示面板的背光, 此 时,所述液晶显示面板显示的画面会成为所述液晶显示装置唯一显示 的画面。
此外,所述液晶显示面板的驱动信号与所述显示控制面板的驱动 信号需要按一定时序提供, 即在给所述液晶显示面板提供驱动信号, 使所述液晶显示面板正常显示的同时, 根据背景透明度的需要, 给所 述显示控制面板提供相应的驱动信号,使得所述液晶显示面板和所述 显示控制面板同步显示,实现所述液晶显示面板画面与所述展示橱窗 内展示物品画面的互动。
可见, 本实施例通过控制显示控制面板内的液晶层, 可以实现液 晶显示面板画面和展示橱窗内展示物品画面的切换,还可以使所述液 晶显示面板画面和展示橱窗内展示物品画面同时显示,从而提高所述 液晶显示装置对展示橱窗内物品的展示效果。
本申请又一实施例公开了另一种液晶显示装置的控制方法,该控 制方法应用于上述液晶层为聚合物分散液晶层时的液晶显示装置。
该控制方法包括:
给所述液晶显示面板提供驱动信号,使所述液晶显示面板正常显 示。
给所述聚合物分散液晶层施加高电压信号,使所述显示控制面板 呈透明状态。即优选地给所述显示控制面板的电极层施加一大于或等 于 10V 的高电压信号, 在第一基板和第二基板之间会产生一高压电 场, 使所述高电压信号施加到所述聚合物分散液晶层上。 则在对所述 聚合物分散液晶层施加高电压时,位于所述聚合物分散液晶的液晶颗 粒内的液晶分子的长轴均沿着电场方向排布,其具有统一的液晶分子 态。 当入射光线的入射方向平行于电场方向入射时, 所述入射光线射 入所述聚合物分散液晶层时,所述液晶颗粒对入射光线的等效折射率 与所述聚合物网络对所述入射光线的等效折射率相等,所述显示控制 面板呈透明状态,对于射入所述显示控制面板的光线的传播方向几乎 没有影响。因而实现所述液晶显示面板画面与展示橱窗内展示物品的 画面之间的互动。
或者, 给所述聚合物分散液晶层施加低电压信号, 使所述显示控 制面板呈灰阶透明状态。即优选地给所述显示控制面板的电极层施加 一大于或等于零伏且小于 10V 的低电压信号, 在第一基板和第二基 板之间会产生一低压电场 (或没有电场), 使所述低电压信号施加到 所述聚合物分散液晶层上。则在对所述聚合物分散液晶层施加低电压 (包括零伏电压)时, 不同的液晶颗粒所处的状态不同。 因此入射光 线的入射方向与每个液晶颗粒轴向的夹角都不相同,从而使得所述液 晶颗粒对入射光线的等效折射率与所述聚合物网络对同一入射光线 的等效折射率不相等。则通过所述液晶层的光线经历多个液晶颗粒后 会发生散射。 此时, 所述显示控制面板呈灰阶透明状态。 当所述低电 压信号的电压值接近 10V 时, 所述显示控制面板对光线的散射作用 较小,展示橱窗内物品的画面可以较清晰的呈现在所述液晶显示面板 上, 而当所述低电压信号的电压值为 0V或接近于 0V时, 所述显示 控制面板对光线的具有很强的散射作用, 此时, 当光线通过所述显示 控制面板后,展示橱窗内物品的画面无法被显示出, 则展示橱窗内发 出的光线完全作为所述液晶显示面板的背光源,而所述液晶显示面板 显示的画面也会成为所述透明液晶显示装置唯一显示的画面。
此外, 优选地, 所述液晶显示面板的驱动信号与所述显示控制面 板的驱动信号需要按一定时序提供,即在给所述液晶显示面板提供驱 动信号, 使所述液晶显示面板正常显示的同时, 根据背景透明度的需 要, 给所述显示控制面板提供相应的驱动信号, 以实现所述液晶显示 面板和所述显示控制面板的同步显示。
可见, 本实施例通过控制显示控制面板内的液晶层, 可以实现液 晶显示面板画面和展示橱窗内展示物品画面的切换,还可以使所述液 晶显示面板画面和展示橱窗内展示物品画面同时显示,从而提高所述 液晶显示装置对展示橱窗内物品的展示效果。
本说明书中各个部分采用递进的方式描述,每个部分重点说明的 都是与其他部分的不同之处,各个部分之间相同或相似部分互相参见 即可。
需要说明的是, 在本文中, 诸如第一和第二等之类的关系术语仅 仅用来将一个实体或者操作与另一个实体或操作区分开来,而不一定 要求或者暗示这些实体或操作之间存在任何这种实际的关系或者顺 序。 而且, 术语 "包括"、 "包含,, 或者其任何其他变体意在涵盖非排 他性的包含, 从而使得包括一系列要素的过程、 方法、 物品或者设备 不仅包括那些要素, 而且还包括没有明确列出的其他要素, 或者是还 包括为这种过程、 方法、 物品或者设备所固有的要素。 在没有更多限 制的情况下, 由语句 "包括一个……,, 限定的要素, 并不排除在包括 所述要素的过程、 方法、 物品或者设备中还存在另外的相同要素。
对所公开的实施例的上述说明,使本领域专业技术人员能够实现 或使用本发明。对这些实施例的多种修改对本领域的专业技术人员来 说将是显而易见的,本文中所定义的一般原理可以在不脱离本发明的 精神或范围的情况下, 在其它实施例中实现。 因此, 本发明将不会被 限制于本文所示的实施例,而是要符合与本文所公开的原理和新颖特 点相一致的最宽的范围。

Claims

权 利 要 求
1、 一种液晶显示装置, 其特征在于, 包括: 液晶显示面板、 显 示控制面板; 所述显示控制面板包括:
相对设置的第一基板与第二基板;
设置于所述第一基板与第二基板之间的液晶层;
分别设置于所述第一基板和第二基板朝向所述液晶层一侧的电 极层;
其中, 所述液晶层为近晶相双频液晶层或聚合物分散液晶层。
2、 根据权利要求 1所述的液晶显示装置, 其特征在于, 所述近 晶相双频液晶在低频电压作用下, 呈正性液晶特性; 所述近晶相双频 液晶在高频电压作用下, 呈负性液晶特性。
3、 根据权利要求 1所述的液晶显示装置, 其特征在于, 所述近 晶相双频液晶层在低频电压作用下, 对入射的光线无散射作用; 所述 近晶相双频液晶层在高频电压作用下, 对入射的光线具有散射作用。
4、 根据权利要求 2或 3所述的液晶显示装置, 其特征在于, 所 述高频电压为大于或等于 2KHz的电压, 所述低频电压为小于 2KHz 的电压。
5、 根据权利要求 1所述的液晶显示装置, 其特征在于, 所述聚 合物分散液晶层包括聚合物网络以及位于所述聚合物网络中的多个 液晶颗粒。
6、 根据权利要求 5所述的液晶显示装置, 其特征在于, 所述液 晶颗粒为向列相液晶颗粒。
7、 根据权利要求 6所述的液晶显示装置, 其特征在于, 在对所 述聚合物分散液晶层施加高电压时,所述液晶颗粒的等效折射率与所 述聚合物网络的等效折射率相等;在对所述聚合物分散液晶层施加低 电压时,所述液晶颗粒的等效折射率与所述聚合物网络的等效折射率 不相等。
8、 根据权利要求 6所述的液晶显示装置, 其特征在于, 在对所 述聚合物分散液晶层施加高电压时,所述显示控制面板为不改变入射 光线传播路径的透明状态; 在对所述聚合物分散液晶层施加低电压 时, 所述显示控制面板为能对入射光线产生散射作用的灰阶透明状 态。
9、 根据权利要求 7或 8所述的液晶显示装置, 其特征在于, 所 述高电压为大于或等于 10V 的电压, 所述低电压为大于或等于零伏 且小于 10V的电压。
10、 根据权利要求 1所述的液晶显示装置, 其特征在于, 所述电 极层包括多个图形化的电极区域, 或者所述电极层为整面的电极层。
11、 根据权利要求 1所述的液晶显示装置, 其特征在于, 所述显 示控制面板与所述液晶显示面板间设置有反射式偏光片。
12、 根据权利要求 11所述的液晶显示装置, 所述反射式偏光片 为金属线栅偏振片。
13、 根据权利要求 1所述的液晶显示装置, 其特征在于, 所述液 晶显示面板包括为所述液晶显示面板提供驱动信号的第一驱动电路; 所述显示控制面板包括为所述显示控制面板提供驱动信号的第二驱 动电路。
14、 根据权利要求 1所述的液晶显示装置, 其特征在于, 还包括 触摸面板。
15、 一种液晶显示装置的控制方法, 应用于权 1-3、 5-8或 10-14 任一项所述的液晶显示装置, 其特征在于, 当所述液晶层为近晶相双 频液晶层时, 包括:
给所述液晶显示面板提供驱动信号,使所述液晶显示面板正常显 示;
给所述近晶相双频液晶层施加低频电压信号,使所述显示控制面 板呈透明状态;
给所述近晶相双频液晶层施加高频电压信号,使所述显示控制面 板呈灰阶透明状态。
16、 根据权利要求 15所述的控制方法, 其特征在于, 所述近晶 相双频液晶层在低频电压作用下, 对入射的光线无散射作用; 所述近 晶相双频液晶层在高频电压作用下, 对入射的光线具有散射作用。
17、 根据权利要求 16所述的控制方法, 其特征在于, 所述高频 电压为大于或等于 2KHz的电压,所述低频电压为小于 2KHz的电压。
18、 一种液晶显示装置的控制方法, 应用于权 1-3、 5-8或 10-14 任一项所述的液晶显示装置, 其特征在于, 当所述液晶层为聚合物分 散液晶层时, 包括:
给所述液晶显示面板提供驱动信号,使所述液晶显示面板正常显 示;
所述聚合物分散液晶层施加高电压信号,使所述显示控制面板呈 透明状态;
所述聚合物分散液晶层施加低电压信号,使所述显示控制面板呈 灰阶透明状态。
19、 根据权利要求 18所述的控制方法, 其特征在于, 在对所述 聚合物分散液晶层施加高电压时,所述聚合物分散液晶层的液晶颗粒 的等效折射率与所述聚合物分散液晶层的聚合物网络的等效折射率 相等; 在对所述聚合物分散液晶层施加低电压时, 所述聚合物分散液 晶层的液晶颗粒的等效折射率与所述聚合物分散液晶层的聚合物网 络的等效折射率不相等。
20、 根据权利要求 19所述的控制方法, 其特征在于, 所述高电 压为大于或等于 10V 的电压, 所述低电压为大于或等于零伏且小于 10V的电压。
PCT/CN2013/080170 2012-10-19 2013-07-26 液晶显示装置及其控制方法 WO2014059809A1 (zh)

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