WO2019178911A1 - 液晶显示装置及其显示控制方法 - Google Patents

液晶显示装置及其显示控制方法 Download PDF

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Publication number
WO2019178911A1
WO2019178911A1 PCT/CN2018/084181 CN2018084181W WO2019178911A1 WO 2019178911 A1 WO2019178911 A1 WO 2019178911A1 CN 2018084181 W CN2018084181 W CN 2018084181W WO 2019178911 A1 WO2019178911 A1 WO 2019178911A1
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Prior art keywords
liquid crystal
crystal cell
polarizer
display device
mode
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PCT/CN2018/084181
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English (en)
French (fr)
Inventor
陈俊吉
萧宇均
陈书志
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惠州市华星光电技术有限公司
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Priority to US16/082,493 priority Critical patent/US20200355951A1/en
Publication of WO2019178911A1 publication Critical patent/WO2019178911A1/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
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133504—Diffusing, scattering, diffracting elements
    • G02F1/133507—Films for enhancing the luminance
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
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    • G02F1/133528—Polarisers
    • 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
    • G02F1/13306—Circuit arrangements or driving methods for the control of single liquid crystal cells
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
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    • G02F1/133504—Diffusing, scattering, diffracting elements
    • G—PHYSICS
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    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1347—Arrangement of liquid crystal layers or cells in which the final condition of one light beam is achieved by the addition of the effects of two or more layers or cells
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1347—Arrangement of liquid crystal layers or cells in which the final condition of one light beam is achieved by the addition of the effects of two or more layers or cells
    • G02F1/13471—Arrangement of liquid crystal layers or cells in which the final condition of one light beam is achieved by the addition of the effects of two or more layers or cells in which all the liquid crystal cells or layers remain transparent, e.g. FLC, ECB, DAP, HAN, TN, STN, SBE-LC cells
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133528—Polarisers
    • G02F1/133531—Polarisers characterised by the arrangement of polariser or analyser axes
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133528—Polarisers
    • G02F1/133545—Dielectric stack polarisers
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/13356—Structural association of cells with optical devices, e.g. polarisers or reflectors characterised by the placement of the optical elements
    • G02F1/133562—Structural association of cells with optical devices, e.g. polarisers or reflectors characterised by the placement of the optical elements on the viewer side
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
    • G02F1/133742—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers for homeotropic alignment
    • 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
    • G02F2203/09—Function characteristic transflective

Definitions

  • the present invention relates to the field of display technologies, and in particular, to a liquid crystal display device and a display control method thereof.
  • a liquid crystal display is a flat ultra-thin display device composed of a certain number of color or black-and-white pixels placed in front of a light source or a reflecting surface.
  • the liquid crystal display device has low power consumption, and has the characteristics of high image quality, small size, and light weight, so it is favored by everyone and becomes the mainstream of the display.
  • a conventional liquid crystal display device is mostly a transmissive liquid crystal display device including a liquid crystal display panel and a backlight unit.
  • the working principle of the liquid crystal display panel is to place liquid crystal molecules in two parallel glass substrates, and electrodes are respectively disposed on the two glass substrates, and the liquid crystal molecules are controlled to change direction by energization or not, and the light of the backlight unit is passed through the liquid crystal display panel.
  • the transmissive liquid crystal display device generally has only a simple display function.
  • various new display devices have been invented, and various manufacturers have more actively developed multifunctional display devices, Multi-functional display devices have also become one of the goals pursued by consumers.
  • Typical multi-functional display devices such as touch display devices and mirror display devices.
  • a mirror display device is a novel display device that can display an image as well as a reflection frame for use as a mirror.
  • a reflective layer is generally disposed on the display panel, and the reflective layer can reflect both ambient ambient light and a part of the light emitted from the display panel, thereby achieving mirror and display.
  • a brightness enhancing film is usually added on the display panel to realize the crystal face display.
  • the mirror display device includes a backlight unit 1 and a liquid crystal panel 2, and the liquid crystal panel 2 includes a lower polarizer 2a sequentially disposed on the backlight unit 1.
  • the liquid crystal cell 2b and the upper polarizer 2c further include a brightness enhancement film 3 disposed on the upper polarizer 2c.
  • the liquid crystal panel 2 is controlled so that the light emitted by the backlight unit 1 can penetrate the liquid crystal panel 2 to display a corresponding image, but at this time, the brightness enhancement film 3 also reflects the external ambient light, and the reflected ambient light will The displayed image causes interference, which reduces the display quality of the image.
  • the present invention provides a liquid crystal display device and a display control method thereof, which can avoid the problem that the liquid crystal display device interferes with each other when performing mirror display and image display, and improves display quality.
  • a liquid crystal display device includes a backlight unit and a liquid crystal panel, wherein the liquid crystal panel includes a first polarizer, a first liquid crystal cell and a second polarizer, which are sequentially disposed on the backlight unit, wherein the liquid crystal
  • the display device further includes a brightness enhancement film, a second liquid crystal cell, and a third polarizer disposed on the second polarizer in sequence; wherein, the light absorption axis of the first polarizer and the light absorption axis of the second polarizer are mutually Vertically, the light absorption axis of the third polarizer and the light absorption axis of the second polarizer are parallel to each other, and the second liquid crystal cell is a VA mode liquid crystal cell.
  • the first liquid crystal cell includes a thin film transistor array substrate and a color filter substrate disposed opposite to each other, and a first liquid crystal layer is disposed between the thin film transistor array substrate and the color filter substrate.
  • the first liquid crystal cell is a VA mode liquid crystal cell.
  • the first liquid crystal cell is a single domain, double domain or multi-domain VA mode liquid crystal cell.
  • the first liquid crystal cell is a TN mode or an IPS mode liquid crystal cell.
  • the second liquid crystal cell includes a first electrode plate and a second electrode plate disposed opposite to each other, and a second liquid crystal layer is disposed between the first electrode plate and the second electrode plate.
  • the second liquid crystal cell is a single domain VA mode liquid crystal cell.
  • the present invention also provides a display control method for a liquid crystal display device as described above, the liquid crystal display device comprising a mirror display mode and an image display mode, wherein the display control method comprises:
  • the first liquid crystal cell is controlled such that the polarization direction does not deflect when the polarized light passes through the liquid crystal layer therein, and the polarization direction is controlled when the second liquid crystal cell is passed through the liquid crystal layer therein Deflection
  • the first liquid crystal cell is controlled such that the polarization direction is deflected when the polarized light passes through the liquid crystal layer therein, and the second liquid crystal cell is controlled such that the polarized light passes through the liquid crystal layer therein without a polarization direction Deflection occurs.
  • the liquid crystal display device and the display control method thereof are provided on the liquid crystal panel, and the brightness enhancement film, the second liquid crystal cell and the third polarizer are sequentially disposed on the liquid crystal panel, and the liquid crystal state of the liquid crystal panel and the second liquid crystal cell are controlled.
  • the reflected external ambient light and the transmitted backlight are transmitted from the display surface, thereby avoiding the problem that the liquid crystal display device interferes with each other when the mirror display and the image display are performed, and the display quality is improved.
  • FIG. 1 is a schematic structural view of a conventional mirror display device
  • FIG. 2 is a schematic structural diagram of a liquid crystal display device according to an embodiment of the present invention.
  • FIG. 3 is an exemplary illustration of the liquid crystal display device of FIG. 2 when performing mirror display;
  • FIG. 4 is an exemplary illustration of the liquid crystal display device of FIG. 2 when image display is performed.
  • the embodiment provides a liquid crystal display device having a mirror display mode and an image display mode.
  • the liquid crystal display device includes a backlight unit 10 and a liquid crystal panel 20, which are disposed opposite to each other, and the liquid crystal panel 20 includes a first polarizer 21, a first liquid crystal cell 22, and a first polarizer 21, which are sequentially disposed on the backlight unit.
  • the second polarizer 23 Further, the liquid crystal display device further includes a brightness enhancement film 30, a second liquid crystal cell 40, and a third polarizer 50 which are sequentially disposed on the second polarizer 23.
  • the light absorption axis of the first polarizer 21 and the light absorption axis of the second polarizer 23 are perpendicular to each other, and the light absorption axis of the third polarizer 50 and the light absorption axis of the second polarizer 23 are parallel to each other.
  • the second liquid crystal cell 40 is a VA (Vertical Alignment) mode liquid crystal cell. Specifically, for example, the direction in which the light absorption axis of the first polarizer 21 is set to 0°, the direction in which the light absorption axes of the second polarizer 23 and the third polarizer 50 are set is 90°.
  • the backlight unit 10 can be selected as a side-lit backlight unit or a direct-lit backlight unit.
  • the first liquid crystal cell 22 includes a thin film transistor array substrate 22a and a color filter substrate 22b disposed opposite to each other, and the thin film transistor array substrate 22a and the color filter substrate 22b are disposed between The first liquid crystal layer 22c.
  • the thin film transistor array substrate 22a includes thin film transistors and pixel electrodes arrayed on a glass substrate, and mutually intersecting data lines, scanning lines, and the like.
  • the color filter substrate 22b mainly includes a color filter film layer and a common electrode layer formed on the glass substrate, and the color filter film layer mainly includes a red photoresist, a green photoresist, and a blue photoresist, and each of A black matrix in which the photoresist of the color is spaced apart from each other.
  • the first liquid crystal cell 22 is selected as a VA (Vertical Alignment) mode liquid crystal cell, and specifically may be a single domain (1-domain), a double domain (2-domain) or a multi-domain ( Multi-domain) VA mode liquid crystal cell.
  • the first liquid crystal cell 22 may also be selected as another mode, such as a TN (Twisted Nematic) mode or an IPS (In-Plane Switching) mode. That is, the first liquid crystal cell 22 can be selected as a liquid crystal cell of any specific structure in the prior art.
  • the brightness enhancement film 30 is configured to reflect external ambient light penetrating from the third polarizer 50 and the second liquid crystal cell 40, when the reflected external ambient light can be from the third polarizer 50 When it is shot, a mirror display is formed.
  • the second liquid crystal cell 40 can be regarded as a light valve. Specifically, as shown in FIG. 2, the second liquid crystal cell 40 includes a first electrode plate 40a and a second electrode plate 40b disposed opposite to each other. A second liquid crystal layer 44c is disposed between the first electrode plate 44a and the second electrode plate 44b. Adjusting the liquid crystal deflection of the second liquid crystal layer 44c by controlling the voltage applied to the first electrode plate 44a and the second electrode plate 44b to control whether the light can penetrate the second liquid crystal cell 40 . In this embodiment, the second liquid crystal cell 40 is selected as a single domain (1-domain) VA mode liquid crystal cell.
  • the liquid crystal display device of the present embodiment includes a mirror display mode and an image display mode.
  • the display control method includes:
  • the first liquid crystal cell 22 is controlled such that polarization direction does not deflect when the polarized light passes through the liquid crystal layer 22c therein, and the second liquid crystal cell 40 is controlled The direction of polarization is deflected when the polarized light passes through the liquid crystal layer 40c therein.
  • the light emitted by the backlight unit 10 passes through the first polarizer 21 to form polarized light L1, and the first liquid crystal cell 22 is controlled so that the polarized light passes through the liquid crystal layer 22c.
  • the direction is not deflected, and since the absorption axis of the second polarizer 23 and the absorption axis of the first polarizer 21 are perpendicular to each other, the polarized light L1 cannot be emitted from the second polarizer 23.
  • the external ambient light passes through the third polarizer 50 to form polarized light L2, and the second liquid crystal cell 40 is controlled such that the polarization direction is deflected when the polarized light passes through the liquid crystal layer 40c therein, and since the polarized light is reflected by the brightness enhancing film 30, The polarization direction is also deflected. Therefore, in combination with the deflection of the polarized light by the liquid crystal layer 40c and the brightness enhancement film 30, the polarized light L3 formed after the reflection can be emitted from the third polarizer 50 to form a mirror display. Based on the above display process, since the light emitted from the backlight unit 10 cannot penetrate the first liquid crystal cell 22, that is, the display surface cannot be reached, the mirror display is not disturbed by the backlight.
  • the first liquid crystal cell 22 is controlled such that polarization direction is deflected when the polarized light passes through the liquid crystal layer 22c therein, and the second liquid crystal cell 40 is controlled to be polarized.
  • the polarization direction does not deflect.
  • the light emitted by the backlight unit 10 passes through the first polarizer 21 to form polarized light L1, and the first liquid crystal cell 22 is controlled so that the polarized light passes through the liquid crystal layer 22c.
  • the direction is deflected, since the absorption axis of the second polarizer 23 and the absorption axis of the first polarizer 21 are perpendicular to each other, the polarized light L4 can be emitted from the second polarizer 23; further, since the second liquid crystal cell is controlled at this time 40, when the polarized light passes through the liquid crystal layer 40c therein, the polarization direction is not deflected, and the absorption axis of the third polarizer 50 and the absorption axis of the second polarizer 23 are parallel to each other, so that the polarized light L4 can be emitted from the third polarizer 50 , the corresponding image display.
  • the external ambient light passes through the third polarizer 50 to form polarized light L2.
  • the second liquid crystal cell 40 Since the second liquid crystal cell 40 is controlled to pass the liquid crystal layer 40c through which the polarized light passes, the polarization direction is not deflected, and the polarized light L2 is brightened. After the reflection 30, the polarized light L5 formed by the deflection is reflected, and the polarized light L5 cannot be emitted from the third polarizer 50, and cannot reach the display surface, so that the image display is not disturbed by the reflected light.
  • the liquid crystal display device and the display control method thereof are provided by controlling the liquid crystal state of the liquid crystal panel and the second liquid crystal cell, and selectively reflecting the reflected external ambient light and the transmitted backlight from the display.
  • the surface is transmitted, thereby avoiding the problem that the liquid crystal display device interferes with each other when the mirror display and the image display are performed, and the display quality is improved.

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Liquid Crystal (AREA)

Abstract

一种液晶显示装置及其显示控制方法，包括相对设置的背光单元（10）和液晶面板（20），液晶面板（20）包括依次设置于背光单元（10）上的第一偏光片（21）、第一液晶盒（22）和第二偏光片（23），其中，液晶显示装置还包括依次设置于第二偏光片（23）上的增亮膜（30）、第二液晶盒（40）以及第三偏光片（50）；其中，第一偏光片（21）的吸光轴与第二偏光片（23）的吸光轴互相垂直，第三偏光片（50）的吸光轴与第二偏光片（23）的吸光轴互相平行，第二液晶盒（40）为VA模式的液晶盒。能够实现镜面显示模式和图像显示模式，避免液晶显示装置在进行镜面显示和图像显示时的光线发生相互干扰的问题，提高显示品质。

Description

液晶显示装置及其显示控制方法 技术领域
本发明涉及显示技术领域，具体涉及一种液晶显示装置及其显示控制方法。
背景技术
液晶显示装置(Liquid Crystal Display，LCD)，为平面超薄的显示设备，它由一定数量的彩色或黑白像素组成，放置于光源或者反射面前方。液晶显示装置功耗很低，并且具有高画质、体积小、重量轻的特点，因此倍受大家青睐，成为显示器的主流。
传统的液晶显示装置大部分为穿透式液晶显示装置，其包括液晶显示面板及背光单元。液晶显示面板的工作原理是在两片平行的玻璃基板当中放置液晶分子，两片玻璃基板上分别设置有电极，通过通电与否来控制液晶分子改变方向，将背光单元的光线穿过液晶显示面板来产生画面。上述的穿透式液晶显示装置，一般都只具有单纯的显示功能，然而随着显示技术的不断进步，各种新型的显示装置被发明出来，各厂商都更积极地发展多功能显示装置，具有多功能的显示装置也已经成为消费者追求的目标之一，典型的多功能显示装置如触控显示装置和镜面显示装置等。
镜面显示装置是一种新型的显示装置，其既可显示图像，也可以反射画面以用作镜子。在镜面显示装置中，一般而言，为达到镜面效果，通常在显示面板上设置反射层，反射层既可反射外界环境光又可投射部分从显示面板发出的光，从而能达到镜子和显示两种效果。现有技术中，通常在显示面板上增加一层增亮膜以实现晶面显示。
图1是现有的一种镜面显示装置的结构示意图，如图1所示，该镜面显示装置包括背光单元1和液晶面板2，液晶面板2包括依次设置于背光单元1上的下偏光片2a、液晶盒2b和上偏光片2c，该镜面显示装置还包括设置于上偏光片2c上的增亮膜3。在进行镜面显示时，控制液晶面板2使得背光单元1发出的光线不能穿透液晶面板2，此时外部环境光照射到增亮膜3后被反射而入射到人 眼，由此，所述镜面显示装置可以被当作镜子使用。在进行图像显示时，控制液晶面板2使得背光单元1发出的光线可以穿透液晶面板2显示相应的图像，但是此时，增亮膜3也还是反射外部环境光，被反射的环境光会对所显示的图像造成干扰，降低了图像画面的显示品质。
因此，现有技术还有待于改进和发展。
发明内容
鉴于现有技术存在的不足，本发明提供了一种液晶显示装置及其显示控制方法，其可以避免液晶显示装置在进行镜面显示和图像显示时的光线发生相互干扰的问题，提高显示品质。
为了达到上述的目的，本发明采用了如下的技术方案：
一种液晶显示装置，包括相对设置的背光单元和液晶面板，所述液晶面板包括依次设置于所述背光单元上的第一偏光片、第一液晶盒和第二偏光片，其中，所述液晶显示装置还包括依次设置于所述第二偏光片上的增亮膜、第二液晶盒以及第三偏光片；其中，所述第一偏光片的吸光轴与所述第二偏光片的吸光轴互相垂直，所述第三偏光片的吸光轴与所述第二偏光片的吸光轴互相平行，所述第二液晶盒为VA模式的液晶盒。
其中，所述第一液晶盒包括相对设置的薄膜晶体管阵列基板和彩色滤光基板，所述薄膜晶体管阵列基板和所述彩色滤光基板之间设置有第一液晶层。
其中，所述第一液晶盒为VA模式的液晶盒。
其中，所述第一液晶盒为单畴、双畴或多畴的VA模式的液晶盒。
其中，所述第一液晶盒为TN模式或IPS模式的液晶盒。
其中，所述第二液晶盒包括相对设置的第一电极板和第二电极板，所述第一电极板和所述第二电极板之间设置有第二液晶层。
其中，所述第二液晶盒为单畴的VA模式的液晶盒。
本发明还提供了一种如上所述的液晶显示装置的显示控制方法，所述液晶显示装置包括镜面显示模式和图像显示模式，其中，所述显示控制方法包括：
在进行镜面显示模式时，控制所述第一液晶盒使得偏振光穿过其中的液晶层时偏振方向不发生偏转，并控制所述第二液晶盒使得偏振光穿过其中的液晶 层时偏振方向发生偏转；
在进行图像显示模式时，控制所述第一液晶盒使得偏振光穿过其中的液晶层时偏振方向发生偏转，并控制所述第二液晶盒使得偏振光穿过其中的液晶层时偏振方向不发生偏转。
本发明实施例提供的液晶显示装置及其显示控制方法，在液晶面板上依次设置增亮膜、第二液晶盒以及第三偏光片，通过控制液晶面板和第二液晶盒的液晶状态，择一地将所反射的外部环境光和所透射的背光从显示面透射出，由此避免了液晶显示装置在进行镜面显示和图像显示时的光线发生相互干扰的问题，提高了显示品质。
附图说明
图1是现有的一种镜面显示装置的结构示意图；
图2是本发明实施例提供的液晶显示装置的结构示意图；
图3是如图2的液晶显示装置在进行镜面显示时的示例性图示；
图4是如图2的液晶显示装置在进行图像显示时的示例性图示。
具体实施方式
为使本发明的目的、技术方案和优点更加清楚，下面结合附图对本发明的具体实施方式进行详细说明。这些优选实施方式的示例在附图中进行了例示。附图中所示和根据附图描述的本发明的实施方式仅仅是示例性的，并且本发明并不限于这些实施方式。
在此，还需要说明的是，为了避免因不必要的细节而模糊了本发明，在附图中仅仅示出了与根据本发明的方案密切相关的结构和/或处理步骤，而省略了与本发明关系不大的其他细节。
本实施例提供了一种液晶显示装置，所述液晶显示装置具有镜面显示模式和图像显示模式。如图2所示，所述液晶显示装置包括相对设置的背光单元10和液晶面板20，所述液晶面板20包括依次设置于所述背光单元上的第一偏光片21、第一液晶盒22和第二偏光片23。进一步地，所述液晶显示装置还包括依次设置于所述第二偏光片23上的增亮膜30、第二液晶盒40以及第三偏光片50。
其中，所述第一偏光片21的吸光轴与所述第二偏光片23的吸光轴互相垂 直，所述第三偏光片50的吸光轴与所述第二偏光片23的吸光轴互相平行，所述第二液晶盒40为VA(Vertical Alignment，垂直配向)模式的液晶盒。具体地，例如所述第一偏光片21的吸光轴的设置方向为0°，则所述第二偏光片23和所述第三偏光片50的吸光轴的设置方向为90°。
其中，所述背光单元10可以选择为侧入式背光单元或直下式背光单元。
其中，如图2所示，所述第一液晶盒22包括相对设置的薄膜晶体管阵列基板22a和彩色滤光基板22b，所述薄膜晶体管阵列基板22a和所述彩色滤光基板22b之间设置有第一液晶层22c。通常地，所述薄膜晶体管阵列基板22a包括阵列设置在玻璃基板上的薄膜晶体管和像素电极以及相互交叉数据线和扫描线等。所述彩色滤光基板22b主要包括形成在玻璃基板上的彩色滤光膜层和公共电极层等，所述彩色滤光膜层则主要包括红色光阻、绿色光阻和蓝色光阻以及将各个颜色的光阻相互间隔的黑矩阵。
本实施例中，所述第一液晶盒22选择为VA(Vertical Alignment，垂直配向)模式的液晶盒，具体可以选择是单畴(1-domain)、双畴(2-domain)或多畴(Multi-domain)的VA模式的液晶盒。在另外的一些实施例中，所述第一液晶盒22也可以选择为其他模式，例如TN(Twisted Nematic，扭曲向列)模式或IPS(In-Plane Switching，面内转换)模式的液晶盒。即，所述第一液晶盒22可以选择是现有技术中任意一种具体结构的液晶盒。
其中，所述增亮膜30用于反射从所述第三偏光片50和所述第二液晶盒40穿透的外部环境光，当被反射的外部环境光可以从所述第三偏光片50射出时，形成镜面显示。
其中，所述第二液晶盒40可视为一个光阀，具体地，如图2所示，所述第二液晶盒40包括相对设置的第一电极板40a和第二电极板40b，所述第一电极板44a和所述第二电极板44b之间设置有第二液晶层44c。通过控制施加在所述第一电极板44a和所述第二电极板44b的电压形成电场，调整所述第二液晶层44c的液晶偏转，实现控制光线是否可以穿透所述第二液晶盒40。本实施例中，所述第二液晶盒40选择为单畴(1-domain)的VA模式的液晶盒。
下面参阅图3和图4介绍如上实施例的液晶显示装置的显示控制方法，如前所述，本实施例提供的液晶显示装置包括镜面显示模式和图像显示模式。具体地，所述显示控制方法包括：
(1)、参阅图3，在进行镜面显示模式时，控制所述第一液晶盒22使得偏振光穿过其中的液晶层22c时偏振方向不发生偏转，并控制所述第二液晶盒40使得偏振光穿过其中的液晶层40c时偏振方向发生偏转。
具体地，如图3所示，在进行镜面显示模式时，背光单元10发出的光线经过第一偏光片21后形成偏振光L1，控制第一液晶盒22使得偏振光穿过液晶层22c时偏振方向不发生偏转，由于第二偏光片23的吸光轴与第一偏光片21的吸光轴互相垂直，因此偏振光L1不可从第二偏光片23射出。外部环境光经过第三偏光片50后形成偏振光L2，控制第二液晶盒40使得偏振光穿过其中的液晶层40c时偏振方向发生偏转，而由于偏振光在被增亮膜30反射时，其偏振方向也会发生偏转，因此结合液晶层40c和增亮膜30对偏振光的偏转，反射后形成的偏振光L3可以从所述第三偏光片50射出，形成镜面显示。基于以上的显示过程，由于背光单元10发出的光线不可穿透第一液晶盒22，也就是不能到达显示面，因此镜面显示不会受到背光的干扰。
(2)、参阅图4，在进行图像显示模式时，控制所述第一液晶盒22使得偏振光穿过其中的液晶层22c时偏振方向发生偏转，并控制所述第二液晶盒40使得偏振光穿过其中的液晶层40c时偏振方向不发生偏转。
具体地，如图4所示，在进行图像显示模式时，背光单元10发出的光线经过第一偏光片21后形成偏振光L1，控制第一液晶盒22使得偏振光穿过液晶层22c时偏振方向发生偏转，由于第二偏光片23的吸光轴与第一偏光片21的吸光轴互相垂直，因此偏振光L4可从第二偏光片23射出；进一步地，由于此时是控制第二液晶盒40使得偏振光穿过其中的液晶层40c时偏振方向不发生偏转，并且第三偏光片50的吸光轴与第二偏光片23的吸光轴互相平行，因此偏振光L4可第三偏光片50射出，进行相应的图像显示。外部环境光经过第三偏光片50后形成偏振光L2，由于此时是控制第二液晶盒40使得偏振光穿过其中的液晶层40c时偏振方向不发生偏转，偏振光L2在被增亮膜30反射后发生偏转形成的偏振光L5，偏振光L5不可从所述第三偏光片50射出，不能到达显示面，因此图像显示不会受到反射光的干扰。
综上所述，本发明实施例提供的液晶显示装置及其显示控制方法，通过控制液晶面板和第二液晶盒的液晶状态，择一地将所反射的外部环境光和所透射的背光从显示面透射出，由此避免了液晶显示装置在进行镜面显示和图像显示时的光线发生相互干扰的问题，提高了显示品质。
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。
以上所述仅是本申请的具体实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本申请原理的前提下，还可以做出若干改进和润饰，这些改进和润饰也应视为本申请的保护范围。

Claims (14)

  1. 一种液晶显示装置，包括相对设置的背光单元和液晶面板，所述液晶面板包括依次设置于所述背光单元上的第一偏光片、第一液晶盒和第二偏光片，其中，所述液晶显示装置还包括依次设置于所述第二偏光片上的增亮膜、第二液晶盒以及第三偏光片；所述第一偏光片的吸光轴与所述第二偏光片的吸光轴互相垂直，所述第三偏光片的吸光轴与所述第二偏光片的吸光轴互相平行，所述第二液晶盒为VA模式的液晶盒。
  2. 根据权利要求1所述的液晶显示装置，其中，所述第一液晶盒包括相对设置的薄膜晶体管阵列基板和彩色滤光基板，所述薄膜晶体管阵列基板和所述彩色滤光基板之间设置有第一液晶层。
  3. 根据权利要求2所述的液晶显示装置，其中，所述第一液晶盒为VA模式的液晶盒。
  4. 根据权利要求3所述的液晶显示装置，其中，所述第一液晶盒为单畴、双畴或多畴的VA模式的液晶盒。
  5. 根据权利要求2所述的液晶显示装置，其中，所述第一液晶盒为TN模式或IPS模式的液晶盒。
  6. 根据权利要求2所述的液晶显示装置，其中，所述第二液晶盒包括相对设置的第一电极板和第二电极板，所述第一电极板和所述第二电极板之间设置有第二液晶层。
  7. 根据权利要求6所述的液晶显示装置，其中，所述第二液晶盒为单畴的VA模式的液晶盒。
  8. 一种液晶显示装置的显示控制方法，所述液晶显示装置包括相对设置的背光单元和液晶面板，所述液晶面板包括依次设置于所述背光单元上的第一偏光片、第一液晶盒和第二偏光片，所述液晶显示装置还包括依次设置于所述第二偏光片上的增亮膜、第二液晶盒以及第三偏光片；所述第一偏光片的吸光轴与所述第二偏光片的吸光轴互相垂直，所述第三偏光片的吸光轴与所述第二偏光片的吸光轴互相平行，所述第二液晶盒为VA模式的液晶盒，所述液晶显示装置包括镜面显示模式和图像显示模式；
    其中，所述显示控制方法包括：
    在进行镜面显示模式时，控制所述第一液晶盒使得偏振光穿过其中的液晶层时偏振方向不发生偏转，并控制所述第二液晶盒使得偏振光穿过其中的液晶层时偏振方向发生偏转；
    在进行图像显示模式时，控制所述第一液晶盒使得偏振光穿过其中的液晶层时偏振方向发生偏转，并控制所述第二液晶盒使得偏振光穿过其中的液晶层时偏振方向不发生偏转。
  9. 根据权利要求8所述的液晶显示装置的显示控制方法，其中，所述第一液晶盒包括相对设置的薄膜晶体管阵列基板和彩色滤光基板，所述薄膜晶体管阵列基板和所述彩色滤光基板之间设置有第一液晶层。
  10. 根据权利要求9所述的液晶显示装置的显示控制方法，其中，所述第一液晶盒为VA模式的液晶盒。
  11. 根据权利要求10所述的液晶显示装置的显示控制方法，其中，所述第一液晶盒为单畴、双畴或多畴的VA模式的液晶盒。
  12. 根据权利要求9所述的液晶显示装置的显示控制方法，其中，所述第一液晶盒为TN模式或IPS模式的液晶盒。
  13. 根据权利要求9所述的液晶显示装置的显示控制方法，其中，所述第二液晶盒包括相对设置的第一电极板和第二电极板，所述第一电极板和所述第二电极板之间设置有第二液晶层。
  14. 根据权利要求13所述的液晶显示装置的显示控制方法，其中，所述第二液晶盒为单畴的VA模式的液晶盒。
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CN111258134B (zh) * 2020-03-19 2022-03-08 Tcl华星光电技术有限公司 显示面板
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CN114384729A (zh) 2020-10-19 2022-04-22 京东方科技集团股份有限公司 显示模组及其制备方法、显示装置

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