CN110618547A - Liquid crystal display device and driving method thereof - Google Patents

Liquid crystal display device and driving method thereof Download PDF

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Publication number
CN110618547A
CN110618547A CN201910907782.XA CN201910907782A CN110618547A CN 110618547 A CN110618547 A CN 110618547A CN 201910907782 A CN201910907782 A CN 201910907782A CN 110618547 A CN110618547 A CN 110618547A
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China
Prior art keywords
electrode
liquid crystal
preset value
voltage difference
display device
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CN201910907782.XA
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Chinese (zh)
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CN110618547B (en
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钟德镇
沈家军
姜丽梅
邹忠飞
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InfoVision Optoelectronics Kunshan Co Ltd
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InfoVision Optoelectronics Kunshan Co Ltd
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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
    • G02F1/1323—Arrangements for providing a switchable viewing angle
    • 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
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133526—Lenses, e.g. microlenses or Fresnel lenses
    • 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
    • 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
    • G02F1/133753—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers with different alignment orientations or pretilt angles on a same surface, e.g. for grey scale or improved viewing angle
    • 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
    • G02F1/1343—Electrodes
    • G02F1/134309—Electrodes characterised by their geometrical arrangement

Abstract

The invention discloses a liquid crystal display device and a driving method thereof, wherein the liquid crystal display device comprises a display panel, a first polarizing plate, a second polarizing plate, a first light modulator, a third polarizing plate, a second light modulator and a fourth polarizing plate, wherein the first light modulator comprises a third substrate, a first electrode, a fourth substrate, a second electrode and a second liquid crystal layer, and the first electrode and the second electrode are respectively arranged on the third substrate and the fourth substrate; the second dimmer includes a fifth substrate, a third electrode, a sixth substrate, a fourth electrode, and a third liquid crystal layer, and the third electrode and the fourth electrode are respectively disposed on the fifth substrate and the sixth substrate. In the liquid crystal display device and the driving method thereof, the display in multiple modes of wide visual angle, left and right narrow visual angle, up and down narrow visual angle and full narrow visual angle can be realized by arranging the first light modulator and the second light modulator, the penetration rate and the contrast ratio of the front view are not influenced in the narrow visual angle mode, and the display effect is good.

Description

Liquid crystal display device and driving method thereof
Technical Field
The present invention relates to the field of liquid crystal display technologies, and in particular, to a liquid crystal display device and a driving method thereof.
Background
The liquid crystal display device has the advantages of good picture quality, small volume, light weight, low driving voltage, low power consumption, no radiation and relatively low manufacturing cost, and is dominant in the field of flat panel display.
With the continuous progress of the liquid crystal display technology, the viewing angle of the display has been widened from about 120 ° to over 160 °, and people want to effectively protect business confidentiality and personal privacy while enjoying the visual experience brought by a large viewing angle, so as to avoid business loss or embarrassment caused by the leakage of screen information. Therefore, in addition to the wide viewing angle, the display device is also required to have a function of switching between the wide viewing angle and the narrow viewing angle.
In order to achieve protection of commercial confidentiality and personal privacy, a blind technology can be adopted, but with this technology, switching to a wide viewing angle mode is impossible, and loss of brightness is severe, and at the same time, manufacturing cost is high, and it is difficult to meet use requirements.
Disclosure of Invention
The invention aims to provide a liquid crystal display device of a liquid crystal display device capable of realizing wide and narrow visual angle switching and a driving method thereof.
The embodiment of the invention provides a liquid crystal display device, which comprises a display panel, a first polarizing plate, a second polarizing plate, a first light modulator, a third polarizing plate, a second light modulator and a fourth polarizing plate, wherein the first polarizing plate and the second polarizing plate are respectively arranged at the first side and the second side of the display panel;
the first dimmer comprises a third substrate, a first electrode, a fourth substrate, a second electrode and a second liquid crystal layer, wherein the second liquid crystal layer is clamped between the third substrate and the fourth substrate, and the first electrode and the second electrode are respectively arranged on the third substrate and the fourth substrate; the second light modulator comprises a fifth substrate, a third electrode, a sixth substrate, a fourth electrode and a third liquid crystal layer, wherein the third liquid crystal layer is clamped between the fifth substrate and the sixth substrate, and the third electrode and the fourth electrode are respectively arranged on the fifth substrate and the sixth substrate.
In one embodiment, the alignment direction of the third liquid crystal layer of the second dimmer is perpendicular to the alignment direction of the second liquid crystal layer of the first dimmer.
In one embodiment, the transmission axis direction of the third polarizer is perpendicular to the transmission axis direction of the fourth polarizer; and/or the transmission axis direction of the first polarizing plate is perpendicular to the transmission axis direction of the second polarizing plate.
In one embodiment, the liquid crystal display device further includes a first light receiving lens and a second light receiving lens, wherein light receiving directions of the first light receiving lens and the second light receiving lens are perpendicular to each other; or, the liquid crystal display device further includes a first light receiving lens, a second light receiving lens, and a third light receiving lens, where light receiving directions of the first light receiving lens and the second light receiving lens are perpendicular to each other, a light receiving direction of the third light receiving lens is parallel to a light receiving direction of the first light receiving lens, and projections of the third light receiving lens and the first light receiving lens on the third substrate are arranged in a staggered manner.
In one embodiment, the liquid crystal display device further includes a fourth light-receiving lens, where the fourth light-receiving lens includes a plurality of lens groups, each lens group is disposed corresponding to a pixel unit of the liquid crystal display device, each lens group includes a first lens and a second lens, and light-receiving directions of the first lens and the second lens are perpendicular to each other; or, the liquid crystal display device further comprises a fifth light receiving lens, and the fifth light receiving lens comprises a plurality of protrusions in a circular truncated cone shape or a truncated pyramid shape.
In one embodiment, the second liquid crystal layer and the third liquid crystal layer are negative liquid crystals, the initial pretilt angles of the liquid crystal molecules of the second liquid crystal layer and the third liquid crystal layer are second pretilt angles larger than the first pretilt angle, the liquid crystal display device is in a full narrow viewing angle mode at the first pretilt angle, the liquid crystal display is in a first wide viewing angle mode at the second pretilt angle, and the first wide viewing angle display mode is the initial display mode of the liquid crystal display device.
The invention also discloses a liquid crystal display device driving method for driving the liquid crystal display device, wherein liquid crystal molecules of the liquid crystal display device are positive liquid crystals, and the liquid crystal display device driving method comprises the following steps:
in a wide viewing angle mode, applying a voltage difference smaller than a first preset value between the first electrode and the second electrode, applying a voltage difference smaller than the first preset value between the third electrode and the fourth electrode, or applying a voltage difference larger than a second preset value between the first electrode and the second electrode, applying a voltage difference smaller than the first preset value between the third electrode and the fourth electrode, wherein the second preset value is larger than the first preset value; or applying a voltage difference larger than a second preset value between the first electrode and the second electrode, and applying a voltage difference larger than the second preset value between the third electrode and the fourth electrode, wherein the second preset value is larger than the first preset value;
in a full narrow viewing angle mode, applying a voltage difference greater than or equal to a first preset value between the first electrode and the second electrode, and applying a voltage difference greater than or equal to the first preset value between the third electrode and the fourth electrode;
in a left and right narrow viewing angle mode, applying a voltage difference smaller than a first preset value between the first electrode and the second electrode, and applying a voltage difference larger than or equal to the first preset value between the third electrode and the fourth electrode;
and in an up-down narrow viewing angle mode, a voltage difference larger than or equal to the first preset value is applied between the first electrode and the second electrode, and a voltage difference smaller than the first preset value is applied between the third electrode and the fourth electrode.
An embodiment of the present invention further provides a liquid crystal display device driving method for driving the liquid crystal display device, where the second liquid crystal layer and the third liquid crystal layer are negative liquid crystals, and the liquid crystal display device driving method includes:
in a full narrow viewing angle mode, applying a voltage difference smaller than a first preset value between the first electrode and the second electrode, and applying a voltage difference smaller than the first preset value between the third electrode and the fourth electrode;
in a wide viewing angle mode, applying a voltage difference greater than or equal to the first preset value between the first electrode and the second electrode, and applying a voltage difference greater than or equal to the first preset value between the third electrode and the fourth electrode;
in a left and right narrow viewing angle mode, applying a voltage difference larger than or equal to the first preset value between the first electrode and the second electrode, and applying a voltage difference smaller than the first preset value between the third electrode and the fourth electrode;
and in an up-and-down narrow viewing angle mode, a voltage difference smaller than the first preset value is applied between the first electrode and the second electrode, and a voltage difference larger than or equal to the first preset value is applied between the third electrode and the fourth electrode.
The present invention also provides a liquid crystal display device driving method for driving the liquid crystal display device, the liquid crystal display device driving method comprising:
in a first wide viewing angle mode, a voltage difference smaller than a first preset value is applied between the first electrode and the second electrode, and a voltage difference smaller than the first preset value is applied between the third electrode and the fourth electrode.
In one embodiment, the method for driving a liquid crystal display device further includes:
in a full narrow viewing angle mode, applying a voltage difference greater than or equal to the first preset value between the first electrode and the second electrode, and applying a voltage difference greater than or equal to the first preset value between the third electrode and the fourth electrode;
in a second wide view angle mode, applying a voltage difference larger than or equal to a third preset value between the first electrode and the second electrode, and applying a voltage difference larger than or equal to the third preset value between the third electrode and the fourth electrode, wherein liquid crystal molecules of the second liquid crystal layer and the third liquid crystal layer are turned to generate a first pretilt angle relative to the second substrate, and the second pretilt angle is larger than the first pretilt angle;
in a left and right narrow viewing angle mode, applying a voltage difference greater than or equal to a third preset value between the first electrode and the second electrode, and applying a voltage difference greater than or equal to the first preset value between the third electrode and the fourth electrode;
and in an up-and-down narrow viewing angle mode, applying a voltage difference larger than or equal to the first preset value between the first electrode and the second electrode, and applying a voltage difference larger than or equal to a third preset value between the third electrode and the fourth electrode, wherein the third preset value is larger than the first preset value.
According to the liquid crystal display device and the driving method thereof, the first light modulator and the second light modulator can be arranged to realize display in multiple modes of wide visual angle, left and right narrow visual angle, up and down narrow visual angle and full narrow visual angle, the penetration rate and the contrast ratio of the front view are not influenced in the narrow visual angle mode, and the display effect is good. In addition, the display panel between the first light modulator and the second light modulator can be matched with various display modes, and the first light modulator and the second light modulator which are orthogonal in the direction of alignment are respectively positioned on two sides of the display panel to form visual angle complementation with the display panel to replace a compensation film, so that the color cast can be improved well.
Drawings
Fig. 1 is a schematic structural diagram of a liquid crystal display device according to a first embodiment of the invention.
Fig. 2 is a display effect image in a wide viewing angle display mode of the liquid crystal display device shown in fig. 1.
Fig. 3 is a graph of measured luminance of a sample in a wide viewing angle display mode of the liquid crystal display device shown in fig. 1.
Fig. 4 is a schematic structural diagram of the liquid crystal display device shown in fig. 1 in a full narrow viewing angle mode under the driving method of the second embodiment.
Fig. 5 is a display effect image in the full narrow viewing angle display mode of the liquid crystal display device shown in fig. 1.
Fig. 6 is a graph of measured luminance of the sample in the full narrow viewing angle display mode of the liquid crystal display device shown in fig. 1.
Fig. 7 is a schematic structural diagram of the liquid crystal display device shown in fig. 1 in a left-right narrow viewing angle mode under the driving method of the second embodiment.
Fig. 8 is a schematic structural diagram of the liquid crystal display device shown in fig. 1 in a vertical narrow viewing angle mode under the driving method of the second embodiment.
Fig. 9 is a schematic structural diagram of the liquid crystal display device shown in fig. 1 in a full narrow viewing angle mode under the driving method of the third embodiment.
Fig. 10 is a schematic structural diagram of the liquid crystal display device shown in fig. 1 in a wide viewing angle mode under the driving method of the third embodiment.
Fig. 11 is a schematic structural diagram of the liquid crystal display device shown in fig. 1 in a left-right narrow viewing angle mode under the driving method of the third embodiment.
Fig. 12 is a schematic structural diagram of the liquid crystal display device shown in fig. 1 in a vertical narrow viewing angle mode under the driving method of the third embodiment.
Fig. 13 is a schematic structural diagram of the liquid crystal display device shown in fig. 1 in a first wide viewing angle mode under the driving method of the fourth embodiment.
Fig. 14 is a schematic structural diagram of the liquid crystal display device shown in fig. 1 in a full narrow viewing angle mode under the driving method of the fourth embodiment.
Fig. 15 is a schematic structural diagram of the liquid crystal display device shown in fig. 1 in a second wide viewing angle mode under the driving method of the fourth embodiment.
Fig. 16 is a schematic structural diagram of the liquid crystal display device shown in fig. 1 in a left-right narrow viewing angle mode under the driving method of the fourth embodiment.
Fig. 17 is a schematic structural diagram of the liquid crystal display device shown in fig. 1 in a vertical narrow viewing angle mode under the driving method of the fourth embodiment.
Fig. 18 is a schematic structural view of a liquid crystal display device according to a fifth embodiment of the present invention.
Fig. 19 is a schematic view of a light receiving principle of the liquid crystal display device shown in fig. 18.
Fig. 20 is a schematic structural diagram of a third light-receiving lens of a liquid crystal display device according to another embodiment of the invention.
Fig. 21 is a schematic structural diagram of a fourth light-receiving lens of a liquid crystal display device according to yet another embodiment of the invention.
Fig. 22 is a schematic structural diagram of a fifth light-receiving lens of a liquid crystal display device according to still another embodiment of the invention.
Detailed Description
To further illustrate the technical means and effects of the present invention adopted to achieve the predetermined objects, the following detailed description of the embodiments, structures, features and effects of the present invention will be made with reference to the accompanying drawings and examples.
First embodiment
Referring to fig. 1, the lcd device according to the first embodiment of the present invention includes a display panel 10, a first polarizing plate 20, a second polarizing plate 30, a first light modulator 50, a third polarizing plate 60, a second light modulator 80, and a fourth polarizing plate 90. In the present embodiment, the first polarizing plate 20 and the second polarizing plate 30 are respectively disposed on the first side and the second side of the display panel 10, the first light modulator 50 is disposed on the side of the first polarizing plate 20 away from the display panel 10, the third polarizing plate 60 is disposed on the side of the first light modulator 50 away from the first polarizing plate 20, the second light modulator 80 is disposed on the side of the second polarizing plate 30 away from the display panel 10, and the fourth polarizing plate 90 is disposed on the side of the second light modulator 80 away from the second polarizing plate 30.
The display panel 10 includes a first substrate 102, a second substrate 104, and a first liquid crystal layer 106 disposed between the first substrate 102 and the second substrate 104. In this embodiment, the first substrate 102 may be an array substrate, and includes a first substrate 1022, a thin film transistor (not shown), a common electrode 1024, and a pixel electrode 1026, where a plurality of pixel units are defined by the scan lines and the data lines, and each pixel unit has a pixel electrode 1026 and a thin film transistor therein. The common electrode 1024 and the pixel electrode 1026 are insulated from each other. Specifically, in the present embodiment, the common electrode 1024 and the pixel electrode 1026 are located in different layers, a first insulating layer 1027 is interposed between the common electrode 1024 and the pixel electrode 1024, the pixel electrode 1026 is disposed above the common electrode 1024, the pixel electrode 1026 is a slit-shaped electrode, and the common electrode 1024 is a planar electrode covering the entire surface of the first substrate 1022. The second substrate 104 may be a color filter substrate, and the color filter substrate includes a second substrate 1042 and a color resist layer 1044 disposed on the second substrate 1042. The color-resist layer 1044 is, for example, R, G, B color resist. A color resist layer 1044 is provided on the surface of the second substrate 1042 on the side close to the first liquid crystal layer 106. A Black Matrix (BM) may be disposed between the color resists of the color resist layer 1044 to prevent light of different colors from being mixed. The first liquid crystal layer 106 may be a horizontally aligned liquid crystal, a vertically aligned liquid crystal, a Twisted Nematic (TN) liquid crystal, or other liquid crystal display technologies, which are not described in detail herein. In the present embodiment, the first liquid crystal layer 106 is an In-Plane Switching (IPS) liquid crystal. Also, in the present embodiment, positive liquid crystal molecules are used for the first liquid crystal layer 106. It is understood that the first liquid crystal layer 106 may also use negative liquid crystal molecules.
The first dimmer 50 includes a third substrate 502, a first electrode 503, a fourth substrate 505, a second electrode 506, and a second liquid crystal layer 508. The second liquid crystal layer 508 is sandwiched between the third substrate 502 and the fourth substrate 505. The first electrode 503 and the second electrode 506 are provided on the third substrate 502 and the fourth substrate 505, respectively. In this embodiment, the first electrode 503 is disposed on the third substrate 502 near the second liquid crystal layer 508, and the second electrode 506 is disposed on the fourth substrate 505 near the second liquid crystal layer 508. Specifically, a second insulating layer 509 may be further provided between the fourth substrate 505 and the second electrode 506. In the present embodiment, the second liquid crystal layer 508 employs positive liquid crystal molecules. It is to be understood that the second liquid crystal layer 508 may also employ negative liquid crystal molecules.
Specifically, the first dimmer 50 further includes a first alignment portion disposed at a corner of the first electrode 503, and a second alignment portion disposed at a corner of the second electrode 506, where the first alignment portion and the second alignment portion are disposed correspondingly, so as to align the third substrate 502 provided with the first electrode 503 and the fourth substrate 505 provided with the second electrode 506 during assembly. Specifically, the first bit alignment portion may be a Black Matrix (BM). A support pillar is also provided between the first electrode 503 and the second electrode 506.
The second dimmer 80 includes a fifth substrate 802, a third electrode 803, a sixth substrate 805, a fourth electrode 806, and a third liquid crystal layer 808. A third liquid crystal layer 808 is sandwiched between the fifth substrate 802 and the sixth substrate 805. A third electrode 803 and a fourth electrode 806 are provided on the fifth substrate 802 and the sixth substrate 805, respectively. In this embodiment, the third electrode 803 is disposed on the side of the fifth substrate 802 close to the third liquid crystal layer 808, and the fourth electrode 806 is disposed on the side of the sixth substrate 805 close to the third liquid crystal layer 808. Specifically, a third insulating layer 809 may be further provided between the sixth substrate 805 and the fourth electrode 806. In this embodiment, the third liquid crystal layer 808 employs positive liquid crystal molecules. It is understood that negative liquid crystal molecules can also be used for the third liquid crystal layer 808.
Specifically, the second light modulator 80 further includes a third alignment portion disposed at a corner of the third electrode 803, and a fourth alignment portion disposed at a corner of the fourth electrode 806, where the third alignment portion and the fourth alignment portion are disposed correspondingly, so as to align the fifth substrate 802 provided with the third electrode 803 and the sixth substrate 805 provided with the fourth electrode 806 during assembly. Specifically, the third bit alignment portion may be a Black Matrix (BM). A support pillar is also provided between the third electrode 803 and the fourth electrode 806.
The alignment direction of the third liquid crystal layer 808 of the second dimmer 80 is different from the alignment direction of the second liquid crystal layer 508 of the first dimmer 50, that is, the alignment direction of the third liquid crystal layer 808 of the second dimmer 80 intersects with the alignment direction of the second liquid crystal layer 508 of the first dimmer 50. Specifically, in the present embodiment, the alignment direction of the third liquid crystal layer 808 of the second dimmer 80 is perpendicular to the alignment direction of the second liquid crystal layer 508 of the first dimmer 50. More specifically, the alignment direction of the third liquid crystal layer 808 of the second dimmer 80 is 0 °, and the alignment direction of the second liquid crystal layer 508 of the first dimmer 50 is 90 °. It is understood that the alignment direction of the third liquid crystal layer 808 of the second light modulator 80 and the alignment direction of the second liquid crystal layer 508 of the first light modulator 50 can be adjusted within a certain range between about 0 ° and about 90 °, as long as the tilt pretilt angle of the liquid crystal molecules in the vertical direction is less than 15 °, so that light passing through the liquid crystal in all directions can pass through the liquid crystal, and a conventional wide viewing angle display mode is formed. The alignment direction of the third liquid crystal layer 808 of the second dimmer 80 is different from the alignment direction of the second liquid crystal layer 508 of the first dimmer 50, so that the liquid crystal phase retardation of the first dimmer 50 and the second dimmer 80 can be between 500nm and 1000nm, preferably 700 nm.
The transmission axis direction of the third polarizing plate 60 is perpendicular to the transmission axis direction of the fourth polarizing plate 90. The transmission axis direction of the first polarizing plate 20 is perpendicular to the transmission axis direction of the second polarizing plate 30. Specifically, the transmission axis direction of the third polarizing plate 60 is parallel to the transmission axis direction of the first polarizing plate 20, and the transmission axis direction of the fourth polarizing plate 90 is parallel to the transmission axis direction of the second polarizing plate 30. In this embodiment, the polarization angles of the first polarizing plate 20 and the third polarizing plate 60 are 0 °, and the polarization angles of the second polarizing plate 30 and the fourth polarizing plate 90 are 90 °. It is understood that the transmission axis of each polarizer may be in other directions.
In this embodiment, the lcd device further includes a backlight module (not shown), the backlight module is disposed on a side of the second light modulator 80 away from the display panel 10, and the backlight module can be a light-collecting backlight module, which can collect light to ensure a display effect.
In the liquid crystal display device, the liquid crystal display device can be switched among a wide viewing angle mode, a right-left narrow viewing angle mode, a top-bottom narrow viewing angle mode, and a top-bottom-right-left narrow viewing angle mode by controlling voltage signals applied to the first electrode 503, the second electrode 506, the third electrode 803, and the fourth electrode 806.
In the first viewing angle mode (i.e., a wide viewing angle display mode in which the liquid crystal molecules of the second and third liquid crystal layers are positive liquid crystal molecules), as shown in fig. 1, a voltage of 0V is applied between the first electrode 503 and the second electrode 506, and a voltage of 0V is applied between the third electrode 803 and the fourth electrode 806. At this time, light passing through the second and third liquid crystal layers 508 and 808 in all directions can pass through the first and second dimmers 50 and 80, and a wide viewing angle display mode is formed. It is to be understood that in the wide viewing angle mode, the voltage difference between the first electrode 503 and the second electrode 506, and between the third electrode 803 and the fourth electrode 806 may not be 0V, and may be, for example, an ac voltage having a magnitude of 0.1V to 0.5V. The frequency of the alternating voltage may be 60Hz to 150 Hz. Fig. 2 and fig. 3 are respectively shown for a display effect image and a sample measured brightness image in a wide viewing angle display mode. Generally, the first viewing angle mode is an initial mode of the liquid crystal display device.
In the second viewing angle mode (i.e., the full narrow viewing angle display mode in which the liquid crystal molecules of the second and third liquid crystal layers are positive liquid crystal molecules), as shown in fig. 4, a voltage larger than OV is applied between the first electrode 503 and the second electrode 506, and a voltage larger than OV is applied between the third electrode 803 and the fourth electrode 806. At this time, the liquid crystal molecules of the second liquid crystal layer 508 and the third liquid crystal layer 808 are turned and tilted with respect to the third substrate 502, so that the incident light which is not vertically incident on the second liquid crystal layer 508 and the third liquid crystal layer 808 generates a phase retardation and cannot pass through the second polarizing plate 30 or the third polarizing plate 60, thereby limiting the viewing angle width and brightness of the upper and lower sides and the left and right sides of the liquid crystal display device, and forming a vertically and horizontally narrow viewing angle display mode. It is understood that in the full narrow viewing angle mode, the voltage difference between the first electrode 503 and the second electrode 506, and between the third electrode 803 and the fourth electrode 806 is preferably an alternating voltage having an amplitude of 1V to 3V. The frequency of the alternating voltage may be 60Hz to 150 Hz. Fig. 5 and fig. 6 are respectively shown for a display effect image and a sample measured brightness image in the full narrow viewing angle display mode.
In the third viewing angle mode (i.e., the left-right narrow viewing angle display mode when the liquid crystal molecules of the second and third liquid crystal layers are positive liquid crystal molecules), as shown in fig. 7, a voltage of 0V is applied between the first electrode 503 and the second electrode 506, and a voltage greater than OV is applied between the third electrode 803 and the fourth electrode 806. At this time, the light passing through the second liquid crystal layer 508 in all directions passes through the first light modulator 50, and the liquid crystal molecules passing through the third liquid crystal layer 808 are turned and tilted with respect to the third substrate 502, so that the incident light which is not vertically incident on the third liquid crystal layer 808 is phase-delayed and cannot pass through the second polarizing plate 30, thereby limiting the viewing angle width and brightness of the left and right sides of the liquid crystal display device, and forming a left and right narrow viewing angle display mode. It is understood that in the full narrow viewing angle mode, the voltage difference between the first electrode 503 and the second electrode 506 may not be 0V, for example, an ac voltage with a magnitude of 0.1V to 0.5V, and the voltage difference between the third electrode 803 and the fourth electrode 806 is preferably an ac voltage with a magnitude of 1V to 3V. The frequency of the alternating voltage may be 60Hz to 150 Hz.
In the fourth viewing angle mode (i.e., the left-right narrow viewing angle display mode in which the liquid crystal molecules of the second and third liquid crystal layers are positive liquid crystal molecules), as shown in fig. 8, a voltage larger than OV is applied between the first electrode 503 and the second electrode 506, and a voltage of 0V is applied between the third electrode 803 and the fourth electrode 806. At this time, the light passing through the third liquid crystal layer 808 in all directions can pass through the second light modulator 80, and the liquid crystal molecules passing through the second liquid crystal layer 508 are turned and tilted with respect to the third substrate 502, so that the incident light which is not vertically incident on the second liquid crystal layer 508 generates a phase delay and cannot pass through the third polarizer 60, thereby limiting the viewing angle width and brightness at the upper and lower sides of the liquid crystal display device, and forming a narrow viewing angle display mode. It is understood that in the full narrow viewing angle mode, the voltage difference between the first electrode 503 and the second electrode 506 is preferably an ac voltage having a magnitude of 1V to 3V, and the voltage difference between the third electrode 803 and the fourth electrode 806 may not be 0V, for example, an ac voltage having a magnitude of 0.1V to 0.5V. The frequency of the alternating voltage may be 60Hz to 150 Hz.
In another embodiment, a voltage of 5V may be applied between the first electrode 503 and the second electrode 506, and a voltage of 0V may be applied between the third electrode 803 and the fourth electrode 806. At this time, light passing through the second and third liquid crystal layers 508 and 808 in all directions can pass through the first and second dimmers 50 and 80, and another wide viewing angle display mode is formed. It is to be understood that in the wide viewing angle mode, the voltage difference between the first electrode 503 and the second electrode 506 may not be 5V, but may be a value greater than 5V, and the voltage difference between the third electrode 803 and the fourth electrode 806 may not be 0V, for example, an ac voltage with an amplitude of 0.1V to 0.5V. The frequency of the alternating voltage may be 60Hz to 150 Hz. When the voltage difference is greater than or equal to 5V, the liquid crystal molecules rotate by a larger angle and return to the non-light-receiving state. By applying a voltage of 5V between the first electrode 503 and the second electrode 506, a finger-pressure stripe generated when the first dimmer 50 is de-energized or energized with a low voltage can be prevented, improving a display effect, and power consumption can be reduced by de-energizing or energizing the second dimmer 80. It is understood that a voltage difference of 5V or more than 5V may be applied between the third electrode 803 and the fourth electrode 806, and a wide viewing angle display may also be achieved, but when the second light modulator 80 is not powered or is powered at a low voltage, the second light modulator does not generate a finger-pressing stripe, and has no influence on the display effect.
In the embodiment, in the wide viewing angle mode, the left and right narrow viewing angles mode or the up and down narrow viewing angle mode, the alternating voltage with the amplitude of 0.1V-0.5V is applied, so that the liquid crystal has a smaller inclination angle, the display effect of the current display mode is not influenced, the liquid crystal can quickly turn when the alternating voltage with the amplitude of 1V-3V is subsequently applied, and the response speed can be accelerated.
This liquid crystal display device, the accessible sets up first light modulator and second light modulator and realizes the demonstration of wide visual angle, about narrow visual angle, narrow visual angle and full narrow visual angle multimode about, to do not influence the penetration rate and the contrast of orthographic view under narrow visual angle mode, the display effect is good. In addition, the display panel between the first light modulator and the second light modulator can be matched with various display modes, and the first light modulator and the second light modulator which are orthogonal in the direction of alignment are respectively positioned on two sides of the display panel to form visual angle complementation with the display panel to replace a compensation film, so that the color cast can be improved well.
Second embodiment
A second embodiment of the present invention provides a liquid crystal display device driving method of driving the liquid crystal display device of the first embodiment described above, in which the second liquid crystal layer 508 and the third liquid crystal layer 808 are both positive liquid crystals, the liquid crystal display device driving method including:
a voltage difference smaller than a first preset value is applied between the first electrode 503 and the second electrode 506, and a voltage difference smaller than the first preset value is applied between the third electrode 803 and the fourth electrode 806. The first preset value can be 0V, and can also be an alternating voltage with the amplitude of 0.1V-0.5V. At this time, light passing through the second and third liquid crystal layers 508 and 808 in all directions can pass through the first and second dimmers 50 and 80, and a wide viewing angle display mode is formed. In this embodiment, the wide viewing angle display mode is an initial display mode of the liquid crystal display device.
The liquid crystal display device driving method further includes: a voltage difference greater than or equal to a first preset value is applied between the first electrode 503 and the second electrode 506, and a voltage difference greater than or equal to a first preset value is applied between the third electrode 803 and the fourth electrode 806. The voltage difference between the first electrode 503 and the second electrode 506, and between the third electrode 803 and the fourth electrode 806 is preferably an alternating voltage having an amplitude of 1V to 3V. At this time, the liquid crystal molecules of the second liquid crystal layer 508 and the third liquid crystal layer 808 are turned and tilted with respect to the third substrate 502, so that the incident light which is not vertically incident on the second liquid crystal layer 508 and the third liquid crystal layer 808 generates a phase retardation and cannot pass through the second polarizing plate 30 or the third polarizing plate 60, thereby limiting the viewing angle width and brightness of the upper and lower sides and the left and right sides of the liquid crystal display device, and forming a vertically and horizontally narrow viewing angle display mode.
The liquid crystal display device driving method further includes: a voltage difference smaller than a first preset value is applied between the first electrode 503 and the second electrode 506, and a voltage difference greater than or equal to the first preset value is applied between the third electrode 803 and the fourth electrode 806. The first preset value can be 0V, and can also be an alternating voltage with the amplitude of 0.1V-0.5V. The voltage difference between the third electrode 803 and the fourth electrode 806 is preferably an alternating voltage having a magnitude of 1V to 3V. At this time, the light passing through the second liquid crystal layer 508 in all directions passes through the first light modulator 50, and the liquid crystal molecules passing through the third liquid crystal layer 808 are turned and tilted with respect to the third substrate 502, so that the incident light which is not vertically incident on the third liquid crystal layer 808 is phase-delayed and cannot pass through the second polarizing plate 30, thereby limiting the viewing angle width and brightness of the left and right sides of the liquid crystal display device, and forming a left and right narrow viewing angle display mode.
The liquid crystal display device driving method further includes: a voltage difference greater than or equal to a first preset value is applied between the first electrode 503 and the second electrode 506, and a voltage difference smaller than the first preset value is applied between the third electrode 803 and the fourth electrode 806. The first preset value can be 0V, and can also be an alternating voltage with the amplitude of 0.1V-0.5V. The voltage difference between the third electrode 803 and the fourth electrode 806 is preferably an alternating voltage having a magnitude of 1V to 3V. At this time, the light passing through the third liquid crystal layer 808 in all directions can pass through the second light modulator 80, and the liquid crystal molecules passing through the second liquid crystal layer 508 are turned and tilted with respect to the third substrate 502, so that the incident light which is not vertically incident on the second liquid crystal layer 508 generates a phase delay and cannot pass through the third polarizer 60, thereby limiting the viewing angle width and brightness at the upper and lower sides of the liquid crystal display device, and forming a narrow viewing angle display mode.
In another embodiment, a voltage difference greater than a second preset value may be applied between the first electrode 503 and the second electrode 506, and a voltage difference less than the first preset value may be applied between the third electrode 803 and the fourth electrode 806. The first preset value can be 0V, or an alternating voltage with amplitude of 0.1V-0.5V, and the second preset value can be 5V or more than 5V. At this time, light passing through the second and third liquid crystal layers 508 and 808 in all directions can pass through the first and second dimmers 50 and 80, and a wide viewing angle display mode is formed. By applying a voltage of 5V between the first electrode 503 and the second electrode 506, a finger-pressure stripe generated when the first dimmer 50 is de-energized or energized with a low voltage can be prevented, improving a display effect, and power consumption can be reduced by de-energizing or energizing the second dimmer 80. It is understood that a voltage difference of 5V or more than 5V may be applied between the third electrode 803 and the fourth electrode 806, and a wide viewing angle display may also be achieved, but when the second light modulator 80 is not powered or is powered at a low voltage, the second light modulator does not generate a finger-pressing stripe, and has no influence on the display effect.
This liquid crystal display device, the accessible sets up first light modulator and second light modulator and realizes the demonstration of wide visual angle, about narrow visual angle, narrow visual angle and full narrow visual angle multimode about, to in the penetration rate and the contrast of narrow visual angle mode lower part influence front view, the display effect is good. In addition, the display panel between the first light modulator and the second light modulator can be matched with various display modes, and the first light modulator and the second light modulator which are orthogonal in the direction of alignment are respectively positioned on two sides of the display panel to form visual angle complementation with the display panel to replace a compensation film, so that the color cast can be improved well.
Third embodiment
A third embodiment of the present invention provides a method for driving the liquid crystal display device of the first embodiment, in which the second liquid crystal layer 508 and the third liquid crystal layer 808 of the liquid crystal display device are both negative liquid crystals, the initial pretilt angles of the liquid crystal molecules of the second liquid crystal layer 508 and the third liquid crystal layer 808 are first pretilt angles, and the first pretilt angles may be about 60 °, that is, the liquid crystal display device is in a full narrow viewing angle display mode, that is, in this embodiment, the full narrow viewing angle display mode is the initial display mode of the liquid crystal display device. The liquid crystal display device driving method includes:
a voltage difference smaller than a first preset value is applied between the first electrode 503 and the second electrode 506, and a voltage difference smaller than the first preset value is applied between the third electrode 803 and the fourth electrode 806. The first preset value can be 0V, and can also be an alternating voltage with the amplitude of 0.1V-0.5V. At this time, as shown in fig. 9, the pretilt angles of the liquid crystal molecules of the second liquid crystal layer 508 and the third liquid crystal layer 808 with respect to the third substrate 502 cause phase retardation of the light incident on the second liquid crystal layer 508 and the third liquid crystal layer 808, but the light cannot pass through the second polarizing plate 30 or the third polarizing plate 60, so that the viewing angle widths and the luminances of the upper and lower sides and the left and right sides of the liquid crystal display device are reduced, and a vertically, horizontally, and fully narrow viewing angle display mode is formed.
The liquid crystal display device driving method further includes: a voltage difference greater than or equal to a first preset value is applied between the first electrode 503 and the second electrode 506, and a voltage difference greater than or equal to a first preset value is applied between the third electrode 803 and the fourth electrode 806. The voltage difference between the first electrode 503 and the second electrode 506, and between the third electrode 803 and the fourth electrode 806 is preferably an alternating voltage having an amplitude of 1V to 3V. At this time, as shown in fig. 10, the liquid crystal molecules of the second liquid crystal layer 508 and the third liquid crystal layer 808 are turned to be substantially horizontal, and light passing through the second liquid crystal layer 508 and the third liquid crystal layer 808 in all directions can pass through the first light modulator 50 and the second light modulator 80, thereby forming a wide viewing angle display mode.
The liquid crystal display device driving method further includes: a voltage difference greater than or equal to a first preset value is applied between the first electrode 503 and the second electrode 506, and a voltage difference smaller than the first preset value is applied between the third electrode 803 and the fourth electrode 806. The first preset value can be 0V, and can also be an alternating voltage with the amplitude of 0.1V-0.5V. The voltage difference between the third electrode 803 and the fourth electrode 806 is preferably an alternating voltage having a magnitude of 1V to 3V. At this time, as shown in fig. 11, light passing through the second liquid crystal layer 508 in all directions passes through the first light modulator 50, and liquid crystal molecules passing through the third liquid crystal layer 808 have a pretilt angle with respect to the third substrate 502, so that incident light which is not vertically incident to the third liquid crystal layer 808 is subjected to phase retardation and cannot pass through the second polarizing plate 30, thereby limiting the viewing angle width and luminance on the left and right sides of the liquid crystal display device, and forming a display mode with narrow viewing angles on the left and right sides.
The liquid crystal display device driving method further includes: a voltage difference smaller than a first preset value is applied between the first electrode 503 and the second electrode 506, and a voltage difference greater than or equal to the first preset value is applied between the third electrode 803 and the fourth electrode 806. The first preset value can be 0V, and can also be an alternating voltage with the amplitude of 0.1V-0.5V. The voltage difference between the third electrode 803 and the fourth electrode 806 is preferably an alternating voltage having a magnitude of 1V to 3V. At this time, as shown in fig. 12, light passing through the third liquid crystal layer 808 in all directions passes through the second light modulator 80, and liquid crystal molecules passing through the second liquid crystal layer 508 are tilted with respect to the third substrate 502, so that incident light which is not vertically incident on the second liquid crystal layer 508 is phase-delayed and cannot pass through the third polarizing plate 60, thereby limiting the viewing angle width and brightness at the upper and lower sides of the liquid crystal display device, and forming a narrow viewing angle display mode.
This liquid crystal display device, the accessible sets up first light modulator and second light modulator and realizes the demonstration of wide visual angle, about narrow visual angle, narrow visual angle and full narrow visual angle multimode about, to do not influence the penetration rate and the contrast of orthographic view under narrow visual angle mode, the display effect is good. In addition, the display panel between the first light modulator and the second light modulator can be matched with various display modes, and the first light modulator and the second light modulator which are orthogonal in the direction of alignment are respectively positioned on two sides of the display panel to form visual angle complementation with the display panel to replace a compensation film, so that the color cast can be improved well.
Fourth embodiment
A fourth embodiment of the present invention provides a method for driving the liquid crystal display device of the first embodiment, in which the second liquid crystal layer 508 and the third liquid crystal layer 808 of the liquid crystal display device are both negative liquid crystals, and in an initial state, the initial pretilt angles of the liquid crystal molecules of the second liquid crystal layer 508 and the third liquid crystal layer 808 are second pretilt angles greater than the first pretilt angle, the second pretilt angle may be about 80 °, which corresponds to a first wide viewing angle mode of the liquid crystal display device, and the first pretilt angle may be about 60 °, which corresponds to a full narrow viewing angle display mode of the liquid crystal display device, that is, in this embodiment, the first wide viewing angle display mode is an initial display mode of the liquid crystal display device. The liquid crystal display device driving method includes:
a voltage difference smaller than a first preset value is applied between the first electrode 503 and the second electrode 506, and a voltage difference smaller than the first preset value is applied between the third electrode 803 and the fourth electrode 806. The first preset value can be 0V, and can also be an alternating voltage with the amplitude of 0.1V-0.5V. At this time, as shown in fig. 13, the larger second pretilt angles of the liquid crystal molecules of the second liquid crystal layer 508 and the third liquid crystal layer 808 with respect to the third substrate 502 enable light passing through the second liquid crystal layer 508 and the third liquid crystal layer 808 in all directions to substantially pass through the first light modulator 50 and the second light modulator 80, thereby forming the first wide viewing angle display mode.
The liquid crystal display device driving method further includes: a voltage difference greater than or equal to a first preset value is applied between the first electrode 503 and the second electrode 506, and a voltage difference greater than or equal to a first preset value is applied between the third electrode 803 and the fourth electrode 806. The first preset value can be an alternating voltage with the amplitude of 1V-3V. The voltage difference between the first electrode 503 and the second electrode 506 and between the third electrode 803 and the fourth electrode 806 is preferably an alternating voltage having an amplitude of 1V to 3V. At this time, as shown in fig. 14, the liquid crystal molecules of the second liquid crystal layer 508 and the third liquid crystal layer 808 are turned to generate a first pretilt angle with respect to the third substrate 502, so that the incident light which is not vertically incident on the second liquid crystal layer 508 and the third liquid crystal layer 808 generates a phase retardation and cannot pass through the second polarizing plate 30 or the third polarizing plate 60, thereby limiting the viewing angle width and brightness of the upper and lower sides and the left and right sides of the liquid crystal display device, and forming a full narrow viewing angle display mode.
The liquid crystal display device driving method further includes: a voltage difference greater than or equal to a third preset value is applied between the first electrode 503 and the second electrode 506, and a voltage difference smaller than the third preset value is applied between the third electrode 803 and the fourth electrode 806. The third preset value can be an alternating voltage with the amplitude of 5V-10V. The voltage difference between the first electrode 503 and the second electrode 506 and between the third electrode 803 and the fourth electrode 806 is preferably an alternating voltage having an amplitude of 5V to 10V. The third preset value is greater than the first preset value. At this time, as shown in fig. 15, the liquid crystal molecules of the second liquid crystal layer 508 and the third liquid crystal layer 808 are turned to be substantially horizontal, and light passing through the second liquid crystal layer 508 and the third liquid crystal layer 808 in all directions can pass through the first light modulator 50 and the second light modulator 80, thereby forming a second wide viewing angle display mode.
The liquid crystal display device driving method further includes: a voltage difference greater than or equal to a third preset value is applied between the first electrode 503 and the second electrode 506, and a voltage difference greater than or equal to a first preset value is applied between the third electrode 803 and the fourth electrode 806. At this time, as shown in fig. 16, all the light passing through the second liquid crystal layer 508 in all directions passes through the first light modulator 50, and the liquid crystal molecules passing through the third liquid crystal layer 808 have a pretilt angle with respect to the third substrate 502, so that the incident light which is not vertically incident to the third liquid crystal layer 808 is phase-delayed and cannot pass through the second polarizing plate 30, thereby limiting the viewing angle width and brightness on the left and right sides of the liquid crystal display device, and forming a display mode with narrow viewing angles on the left and right sides.
The liquid crystal display device driving method further includes: a voltage difference greater than or equal to a first preset value is applied between the first electrode 503 and the second electrode 506, and a voltage difference greater than or equal to a third preset value is applied between the third electrode 803 and the fourth electrode 806. At this time, as shown in fig. 17, light passing through the third liquid crystal layer 808 in all directions passes through the second light modulator 80, and liquid crystal molecules passing through the second liquid crystal layer 508 are tilted with respect to the third substrate 502, so that incident light which is not vertically incident on the second liquid crystal layer 508 is phase-delayed and cannot pass through the third polarizing plate 60, thereby limiting the viewing angle width and brightness at the upper and lower sides of the liquid crystal display device, and forming a narrow viewing angle display mode.
This liquid crystal display device, the accessible sets up first light modulator and second light modulator and realizes the demonstration of wide visual angle, about narrow visual angle, narrow visual angle and full narrow visual angle multimode about, to do not influence the penetration rate and the contrast of orthographic view under narrow visual angle mode, the display effect is good. In addition, the display panel between the first light modulator and the second light modulator can be matched with various display modes, and the first light modulator and the second light modulator which are orthogonal in the direction of alignment are respectively positioned on two sides of the display panel to form visual angle complementation with the display panel to replace a compensation film, so that the color cast can be improved well.
Because when setting up the initial pretilt angle of liquid crystal, its angle is restricted by the manufacturing process, and is difficult to control, in this embodiment, through setting up the angle of second pretilt angle great, make liquid crystal display device realize narrow visual angle through subsequent voltage control and show, the accessible control voltage realizes the accurate control at liquid crystal inclination, guarantees the effect at narrow visual angle.
The driving method of the liquid crystal display device of this embodiment is the same as the liquid crystal display device of the above embodiment, and further details of the driving method can be referred to the description of the liquid crystal display device in the above embodiment, and are not repeated herein.
Fifth embodiment
As shown in fig. 18, the structure of the liquid crystal display device according to the fifth embodiment of the present invention is substantially the same as that of the liquid crystal display device according to the first embodiment, except that the liquid crystal display device according to the present embodiment further includes a first protective layer 511 disposed between the third substrate 502 and the first electrode 503, and a second protective layer 811 disposed between the fifth substrate 802 and the third electrode 803, a first light receiving lens 513 is disposed between the first protective layer 511 and the third substrate 502, a second light receiving lens 813 is disposed between the second protective layer 811 and the fifth substrate 802, light receiving directions of the first light receiving lens 513 and the second light receiving lens 813 are perpendicular to each other, a refractive index of the first protective layer 511 is smaller than a refractive index of the first light receiving lens 513, and a refractive index of the second protective layer 811 is smaller than a refractive index of the second light receiving lens 813. In this embodiment, the first light receiving lens 513 includes a plurality of first protruding strips arranged in parallel at intervals, and each of the first protruding strips includes a light receiving surface facing the fourth polarizing plate 90; the second light receiving lens 813 includes a plurality of second protruding strips arranged in parallel at intervals, each second protruding strip includes a light receiving surface facing one side of the fourth polarizer 90, and the second protruding strips are perpendicular to the first protruding strips. Specifically, the cross sections of the first protruding strips and the second protruding strips may be trapezoidal, but of course, the cross sections of the first protruding strips and the second protruding strips may also be other shapes such as triangular. As shown in fig. 19, a schematic diagram of the first light collecting lens 513 collecting light is shown, where the first light collecting lens 513 collects light left and right.
It is to be understood that the first light collecting lens 513 and the second light collecting lens 813 may be disposed at other positions of the liquid crystal display device, for example, on both the fourth substrate 505 and the sixth substrate 805.
In this embodiment, the lcd device further includes a backlight module (not shown), and the backlight module is disposed on a side of the second light modulator 80 away from the display panel 10. Since the first light collecting lens 513 and the second light collecting lens 813 collect light, the backlight module in this embodiment can be a common non-light-collecting backlight module, and still can ensure the display effect.
This liquid crystal display device, the accessible sets up first light modulator and second light modulator and realizes the demonstration of wide visual angle, about narrow visual angle, narrow visual angle and full narrow visual angle multimode about, to do not influence the penetration rate and the contrast of orthographic view under narrow visual angle mode, the display effect is good. In addition, the display panel between the first light modulator and the second light modulator can be matched with various display modes, and the first light modulator and the second light modulator which are orthogonal in the direction of alignment are respectively positioned on two sides of the display panel to form visual angle complementation with the display panel to replace a compensation film, so that the color cast can be improved well.
In another embodiment, as shown in fig. 20, a third light receiving lens 515 and a third protective layer 517 may also be disposed in the first light modulator 50, a light receiving direction of the third light receiving lens 515 is parallel to a light receiving direction of the first light receiving lens 513, projections of the third light receiving lens 515 and the first light receiving lens 513 on the third substrate 502 are arranged in a staggered manner, the third light receiving lens 515 is located between the first protective layer 511 and the third protective layer 517, and a refractive index of the third protective layer 517 is smaller than a refractive index of the third light receiving lens 515. Specifically, the third light receiving lens 515 includes a plurality of third protruding strips arranged in parallel at intervals, each of the third protruding strips includes a light receiving surface facing one side of the fourth polarizing plate 90, and projections of the plurality of first protruding strips and the plurality of third protruding strips on the third substrate 502 are alternately arranged and are parallel to each other. Receive parallel and staggered two through setting up of light direction and receive optical lens, can receive light with more light, receive the light effect better. It is understood that a light collecting lens may be additionally disposed in the second light modulator 80. It is understood that the two light-receiving lenses with parallel and staggered light-receiving directions can also be disposed at different positions of the liquid crystal display device, for example, one is disposed in the first light modulator 50 and one is disposed in the second light modulator 80, and in any case, the positions thereof are not limited herein.
In still another embodiment, as shown in fig. 21, the liquid crystal display device may include a fourth light-receiving lens, the fourth light-receiving lens includes a plurality of lens groups 520, each lens group 520 is disposed corresponding to one pixel unit P of the liquid crystal display device, each lens group 520 includes a first lens 522 and a second lens 524, and light-receiving directions of the first lens 522 and the second lens 524 are perpendicular to each other. Specifically, the first lens 522 includes a plurality of fourth convex strips arranged in parallel at intervals, and the second lens 524 includes a plurality of fifth convex strips arranged in parallel at intervals, wherein the fifth convex strips are arranged perpendicular to the fourth convex strips. Specifically, the cross sections of the fourth ridge and the fifth ridge may be trapezoidal, but of course, the cross sections of the fourth ridge and the fifth ridge may be other shapes such as triangular. By the arrangement, only one layer of light receiving lens is needed to be arranged, light receiving in four directions of up, down, left and right can be achieved, and the liquid crystal display device is thinner. Here, the specific installation position of the fourth light collecting lens in the liquid crystal display device is not limited.
In another embodiment, as shown in fig. 22, the lcd device may include a fifth light-receiving lens, and the fifth light-receiving lens includes a plurality of protrusions 530 in the shape of truncated cones. Specifically, the protrusion 530 is disposed corresponding to the pixel unit P of the liquid crystal display device, and one or more protrusions 530 may be disposed corresponding to each pixel unit P. By arranging the fifth light receiving lens to include a plurality of circular truncated cone-shaped protrusions 530, light in all directions can be received only by arranging one light receiving lens, so that the light receiving effect is good, and the liquid crystal display device is thinner. It is understood that the protrusion 530 may also be shaped like a frustum of a pyramid, for example, and can also collect light in four directions, i.e., up, down, left, and right. Here, the specific arrangement position of the fifth light collecting lens in the liquid crystal display device is not limited.
It is understood that the driving methods of the liquid crystal display devices according to the second to fourth embodiments can be applied to the liquid crystal display device according to this embodiment, and are not described herein again.
Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (10)

1. A liquid crystal display device includes a display panel (10), a first polarizing plate (20), a second polarizing plate (30), a first light modulator (50), a third polarizing plate (60), a second light modulator (80), and a fourth polarizing plate (90), the first polarizing plate (20) and the second polarizing plate (30) are respectively disposed on a first side and a second side of the display panel (10), the first light modulator (50) is disposed on a side of the first polarizer (20) away from the display panel (10), the third polarizer (60) is located on the side of the first light modulator (50) away from the first polarizer (20), the second light modulator (80) is located on a side of the second polarizer (30) away from the display panel (10), the fourth polarizer (90) is located on the side of the second light modulator (80) away from the second polarizer (30);
the first dimmer (50) comprises a third substrate (502), a first electrode (503), a fourth substrate (505), a second electrode (506) and a second liquid crystal layer (508), wherein the second liquid crystal layer (508) is clamped between the third substrate (502) and the fourth substrate (505), and the first electrode (503) and the second electrode (506) are respectively arranged on the third substrate (502) and the fourth substrate (505); the second light modulator (80) comprises a fifth substrate (802), a third electrode (803), a sixth substrate (805), a fourth electrode (806) and a third liquid crystal layer (808), wherein the third liquid crystal layer (808) is sandwiched between the fifth substrate (802) and the sixth substrate (805), and the third electrode (803) and the fourth electrode (806) are respectively arranged on the fifth substrate (802) and the sixth substrate (805).
2. The lcd apparatus of claim 1, wherein the alignment direction of the third lc layer (808) of the second dimmer (80) is perpendicular to the alignment direction of the second lc layer (508) of the first dimmer (50).
3. The liquid crystal display device according to claim 1, wherein the direction of the transmission axis of the third polarizing plate (60) is perpendicular to the direction of the transmission axis of the fourth polarizing plate (90); and/or the transmission axis direction of the first polarizing plate (20) is perpendicular to the transmission axis direction of the second polarizing plate (30).
4. The lcd apparatus of claim 1, further comprising a first light collecting lens (513) and a second light collecting lens (813), wherein light collecting directions of the first light collecting lens (513) and the second light collecting lens (813) are perpendicular to each other; or, the liquid crystal display device further comprises a first light-receiving lens (513), a second light-receiving lens (813) and a third light-receiving lens (515), the light-receiving directions of the first light-receiving lens (513) and the second light-receiving lens (813) are perpendicular to each other, the light-receiving direction of the third light-receiving lens (515) is parallel to the light-receiving direction of the first light-receiving lens (513), and the projections of the third light-receiving lens (515) and the first light-receiving lens (513) on the third substrate (502) are arranged in a staggered manner.
5. The lcd apparatus of claim 1, further comprising a fourth light-receiving lens, wherein the fourth light-receiving lens comprises a plurality of lens groups (520), each lens group (520) is disposed corresponding to a pixel unit (P) of the lcd apparatus, each lens group (520) comprises a first lens (522) and a second lens (524), and light-receiving directions of the first lens (522) and the second lens (524) are perpendicular to each other; alternatively, the liquid crystal display device further comprises a fifth light-receiving lens, and the fifth light-receiving lens comprises a plurality of bosses (530) in a circular truncated cone shape or a truncated pyramid shape.
6. The liquid crystal display device according to claim 1, wherein the second liquid crystal layer (508) and the third liquid crystal layer (808) are negative liquid crystals, an initial pretilt angle of liquid crystal molecules of the second liquid crystal layer (508) and the third liquid crystal layer (808) is a second pretilt angle larger than a first pretilt angle at which the liquid crystal display device is in a full narrow viewing angle mode, at which the liquid crystal display device is in a first wide viewing angle mode, and the first wide viewing angle display mode is the initial display mode of the liquid crystal display device.
7. A liquid crystal display device driving method for driving a liquid crystal display device according to any one of claims 1 to 5, the second liquid crystal layer (508) and the third liquid crystal layer (808) being positive liquid crystals, the liquid crystal display device driving method comprising:
in a wide viewing angle mode, applying a voltage difference smaller than a first preset value between the first electrode (503) and the second electrode (506), and applying a voltage difference smaller than the first preset value between the third electrode (803) and the fourth electrode (806); or, a voltage difference greater than a second preset value is applied between the first electrode (503) and the second electrode (506), and a voltage difference smaller than a first preset value is applied between the third electrode (803) and the fourth electrode (806), wherein the second preset value is greater than the first preset value; or, a voltage difference larger than a second preset value is applied between the first electrode (503) and the second electrode (506), and a voltage difference larger than the second preset value is applied between the third electrode (803) and the fourth electrode (806), wherein the second preset value is larger than the first preset value;
in a full narrow viewing angle mode, applying a voltage difference greater than or equal to a first preset value between the first electrode (503) and the second electrode (506), and applying a voltage difference greater than or equal to the first preset value between the third electrode (803) and the fourth electrode (806);
in a left-right narrow viewing angle mode, a voltage difference smaller than a first preset value is applied between the first electrode (503) and the second electrode (506), and a voltage difference larger than or equal to the first preset value is applied between the third electrode (803) and the fourth electrode (806);
in a top-bottom narrow viewing angle mode, a voltage difference greater than or equal to the first preset value is applied between the first electrode (503) and the second electrode (506), and a voltage difference smaller than the first preset value is applied between the third electrode (803) and the fourth electrode (806).
8. A liquid crystal display device driving method for driving a liquid crystal display device according to any one of claims 1 to 5, the second liquid crystal layer (508) and the third liquid crystal layer (808) being negative liquid crystals, the liquid crystal display device driving method comprising:
in a full narrow viewing angle mode, applying a voltage difference smaller than a first preset value between the first electrode (503) and the second electrode (506), and applying a voltage difference smaller than the first preset value between the third electrode (803) and the fourth electrode (806);
in a wide viewing angle mode, applying a voltage difference greater than or equal to the first preset value between the first electrode (503) and the second electrode (506), and applying a voltage difference greater than or equal to the first preset value between the third electrode (803) and the fourth electrode (806);
in a left-right narrow viewing angle mode, a voltage difference greater than or equal to the first preset value is applied between the first electrode (503) and the second electrode (506), and a voltage difference smaller than the first preset value is applied between the third electrode (803) and the fourth electrode (806);
in the up-and-down narrow viewing angle mode, a voltage difference smaller than the first preset value is applied between the first electrode (503) and the second electrode (506), and a voltage difference greater than or equal to the first preset value is applied between the third electrode (803) and the fourth electrode (806).
9. A liquid crystal display device driving method for driving the liquid crystal display device according to claim 6, characterized by comprising:
in a first wide viewing angle mode, a voltage difference smaller than a first preset value is applied between the first electrode (503) and the second electrode (506), and a voltage difference smaller than the first preset value is applied between the third electrode (803) and the fourth electrode (806).
10. The liquid crystal display device according to claim 9, wherein the liquid crystal display device driving method further comprises:
in a full narrow viewing angle mode, applying a voltage difference greater than or equal to the first preset value between the first electrode (503) and the second electrode (506), and applying a voltage difference greater than or equal to the first preset value between the third electrode (803) and the fourth electrode (806);
in a second wide viewing angle mode, applying a voltage difference larger than or equal to a third preset value between the first electrode (503) and the second electrode (506), applying a voltage difference larger than or equal to a third preset value between the third electrode (803) and the fourth electrode (806), and turning liquid crystal molecules of the second liquid crystal layer (508) and the third liquid crystal layer (808) to generate the first pretilt angle relative to the second substrate (502);
in a left-right narrow viewing angle mode, a voltage difference greater than or equal to the third preset value is applied between the first electrode (503) and the second electrode (506), and a voltage difference greater than or equal to the first preset value is applied between the third electrode (803) and the fourth electrode (806);
in an up-and-down narrow viewing angle mode, a voltage difference greater than or equal to the first preset value is applied between the first electrode (503) and the second electrode (506), and a voltage difference greater than or equal to a third preset value is applied between the third electrode (803) and the fourth electrode (806), wherein the third preset value is greater than the first preset value.
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