CN107144990B - Multi-view angle controllable liquid crystal display device and driving method - Google Patents
Multi-view angle controllable liquid crystal display device and driving method Download PDFInfo
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- CN107144990B CN107144990B CN201710423549.5A CN201710423549A CN107144990B CN 107144990 B CN107144990 B CN 107144990B CN 201710423549 A CN201710423549 A CN 201710423549A CN 107144990 B CN107144990 B CN 107144990B
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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
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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
- G02F1/13306—Circuit arrangements or driving methods for the control of single liquid crystal cells
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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
- G02F1/1343—Electrodes
- G02F1/134309—Electrodes characterised by their geometrical arrangement
Abstract
A multi-view controllable LCD device and its driving method, wherein the LCD device comprises a first substrate, a second substrate arranged opposite to the first substrate, and a liquid crystal layer arranged between the first substrate and the second substrate, a view control electrode is arranged on the first substrate, a common electrode and a pixel electrode are arranged on the second substrate, a plurality of pixel units are formed on the second substrate by the limitation of scanning lines and data lines, the plurality of pixel units comprise a first pixel unit and a second pixel unit, liquid crystal molecules in the liquid crystal layer are initially arranged in a direction of vertical direction in the first pixel unit, the liquid crystal molecules in the liquid crystal layer are initially arranged in a direction of horizontal direction in the second pixel unit, the viewing angle control electrode comprises a first electrode part and a second electrode part which are insulated from each other, the first electrode part correspondingly covers each first pixel unit, and the second electrode part correspondingly covers each second pixel unit.
Description
Technical Field
The invention relates to the technical field of liquid crystal display, in particular to a multi-view-angle controllable liquid crystal display device and a driving method.
Background
A Liquid Crystal Display (LCD) has advantages of good picture quality, small size, light weight, low driving voltage, low power consumption, no radiation, and relatively low manufacturing cost, and is dominant in the field of flat panel displays.
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 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. At present, there are several ways to switch between a wide viewing angle and a narrow viewing angle of a liquid crystal display device.
The first is realized by attaching a shutter shielding film on the display screen, and when peep prevention is needed, the view angle can be reduced by shielding the screen by the shutter shielding film. However, in this method, an extra louver film is required to be prepared, which causes great inconvenience to a user, and one louver film can only realize one viewing angle, and once the louver film is attached, the viewing angle is fixed, and only a narrow viewing angle mode can be realized, and the wide viewing angle function cannot be displayed.
The second is to arrange a dual light source backlight system in the lcd device for adjusting the viewing angle of the lcd device, the dual light source backlight system is composed of two stacked light guide plates combined with an inverse prism sheet, the top light guide plate (LGP-T) combined with the inverse prism sheet changes the direction of the light so that the light is limited in a relatively narrow angular range, thereby realizing the narrow viewing angle of the lcd device, while the bottom light guide plate (LGP-B) combined with the inverse prism sheet functions to realize the wide viewing angle of the lcd device. However, such a dual-light source backlight system increases the thickness and cost of the liquid crystal display device, and is not suitable for the trend of thinning the liquid crystal display device.
The third is to apply a vertical electric field to the liquid crystal molecules by using a viewing angle control electrode on one side of a color filter substrate (CF), thereby realizing a narrow viewing angle mode. Referring to fig. 1 and 2, the lcd device includes a first substrate 11, a second substrate 12, and a liquid crystal layer 13 disposed between the first substrate 11 and the second substrate 12, wherein a viewing angle control electrode 111 is disposed on the first substrate 11. As shown in fig. 1, in the wide viewing angle display, the viewing angle control electrode 111 on the first substrate 11 does not apply a voltage, and the liquid crystal display device realizes the wide viewing angle display. As shown in fig. 2, when a narrow viewing angle display is required, the viewing angle control electrode 111 on the first substrate 11 is applied with a voltage, the liquid crystal molecules in the liquid crystal layer 13 are tilted due to the vertical electric field E (as shown by the arrow in the figure) while rotating horizontally, and the contrast of the liquid crystal display device is reduced due to light leakage, thereby finally realizing a narrow viewing angle. However, this method only allows the left-right viewing angle or the up-down viewing angle of one lcd panel, but does not allow the up-down viewing angle and the left-right viewing angle to be simultaneously controllable.
Disclosure of Invention
The invention aims to provide a multi-view-angle controllable liquid crystal display device and a driving method thereof, which are used for solving the defects of the conventional view angle switching mode, so that one liquid crystal display screen can realize the controllability of a left-right view angle or a top-bottom view angle, and can simultaneously realize the controllability of a top-bottom view angle and a left-right view angle.
The embodiment of the invention provides a multi-view controllable liquid crystal display device, which comprises a first substrate, a second substrate arranged opposite to the first substrate, and a liquid crystal layer positioned between the first substrate and the second substrate, wherein a view control electrode is arranged on the first substrate, a common electrode and a pixel electrode are arranged on the second substrate, a plurality of pixel units are formed on the second substrate in a limited manner by scanning lines and data lines, the plurality of pixel units comprise a first pixel unit and a second pixel unit, liquid crystal molecules in the liquid crystal layer are initially aligned in the first pixel unit along the vertical direction, the liquid crystal molecules in the liquid crystal layer are initially aligned in the second pixel unit along the horizontal direction, the view control electrode comprises a first electrode part and a second electrode part which are mutually insulated, and the first electrode part correspondingly covers each first pixel unit, the second electrode part correspondingly covers each second pixel unit.
Further, the pixel electrode includes a first pixel electrode and a second pixel electrode, the first pixel electrode is disposed in each first pixel unit, the second pixel electrode is disposed in each second pixel unit, the first pixel electrode includes a plurality of first pixel electrode stripes spaced from each other, the second pixel electrode includes a plurality of second pixel electrode stripes spaced from each other, and the extending directions of the plurality of first pixel electrode stripes and the plurality of second pixel electrode stripes are perpendicular to each other.
Further, the plurality of first pixel electrode bars extend along a vertical direction, and the plurality of second pixel electrode bars extend along a horizontal direction.
Further, each first pixel unit is arranged in a plurality of rows along the horizontal direction, each second pixel unit is also arranged in a plurality of rows along the horizontal direction, and the plurality of rows of first pixel units and the plurality of rows of second pixel units are arranged in a staggered mode.
Further, the first electrode portion includes a plurality of first viewing angle control electrode strips extending along the horizontal direction, each of the first viewing angle control electrode strips correspondingly covers one row of the first pixel units, the second electrode portion includes a plurality of second viewing angle control electrode strips extending along the horizontal direction, and each of the second viewing angle control electrode strips correspondingly covers one row of the second pixel units.
Furthermore, each first pixel unit is arranged into a plurality of columns along the vertical direction, each second pixel unit is also arranged into a plurality of columns along the vertical direction, and the plurality of columns of first pixel units and the plurality of columns of second pixel units are arranged in a staggered mode.
Further, the first electrode portion includes a plurality of first viewing angle control electrode strips extending along the vertical direction, each first viewing angle control electrode strip correspondingly covers one column of the first pixel units, the second electrode portion includes a plurality of second viewing angle control electrode strips extending along the vertical direction, and each second viewing angle control electrode strip correspondingly covers one column of the second pixel units.
Furthermore, each first pixel unit and each second pixel unit are dispersed, the adjacent positions of the first pixel unit in the vertical direction and the horizontal direction are the second pixel units, the adjacent positions of the second pixel unit in the vertical direction and the horizontal direction are the first pixel units, and the pixel units connected with the same data line are the first pixel units or the second pixel units and are alternately distributed on two sides of the data line.
Further, the first electrode portion includes a plurality of first viewing angle control electrode strips extending along the oblique direction, each of the first viewing angle control electrode strips correspondingly covers an upward column of the first pixel units, the second electrode portion includes a plurality of second viewing angle control electrode strips extending along the oblique direction, and each of the second viewing angle control electrode strips correspondingly covers an upward column of the second pixel units.
Further, the first electrode part further comprises a first conductive strip electrically connected with the plurality of first viewing angle control electrode strips, the second electrode part further comprises a second conductive strip electrically connected with the plurality of second viewing angle control electrode strips, and the first electrode part and the second electrode part are mutually inserted and matched.
The embodiment of the present invention further provides a driving method of the above-mentioned multi-view controllable liquid crystal display device, where the driving method includes:
in a wide viewing angle mode, applying a voltage signal that is the same as or has a small voltage difference with respect to the common electrode to both the first electrode portion and the second electrode portion;
in the upper, lower, left and right peep-proof mode, voltage signals with larger pressure difference relative to the common electrode are applied to the first electrode part and the second electrode part;
in a left-right peep-proof mode, a voltage signal which is the same as the common electrode or has a smaller voltage difference relative to the common electrode is applied to the first electrode part, and a voltage signal having a larger voltage difference relative to the common electrode is applied to the second electrode part;
in the up-down peep-proof mode, a voltage signal which is the same as or has a smaller voltage difference relative to the common electrode is applied to the second electrode part, and a voltage signal having a larger voltage difference relative to the common electrode is applied to the first electrode part.
Further, under a wide viewing angle mode and an up-down and left-right peep-proof mode, driving each first pixel unit and each second pixel unit to perform normal display; in the left and right peep-proof mode, driving each second pixel unit to carry out normal display, but closing each first pixel unit; in the up-down peep-proof mode, each first pixel unit is driven to perform normal display, but each second pixel unit is closed.
Further, the liquid crystal display device further includes a driving circuit, the first electrode portion and the second electrode portion are electrically connected to the driving circuit, respectively, and a desired voltage signal is applied to the first electrode portion and the second electrode portion through the driving circuit, respectively.
Furthermore, the liquid crystal display device is provided with a visual angle switching key for switching different visual angle modes of the liquid crystal display device.
According to the multi-view-angle controllable liquid crystal display device and the driving method provided by the embodiment of the invention, different voltage differences can be generated between the first electrode part and the common electrode or between the second electrode part and the common electrode by controlling the voltage applied to the first electrode part or the second electrode part of the view angle control electrode, liquid crystal molecules are controlled to generate deflection angles of different degrees, and the view angle adjustment of the liquid crystal display device is realized, so that one liquid crystal display screen can realize the controllability of the view angle in the left-right direction or the view angle in the up-down direction and the view angle in the left-right direction simultaneously, the wide-narrow view angle switching of the liquid crystal display device can be easily realized under the conditions that a shielding film is not needed, the product thickness is not basically increased, and the cost is controllable, and the defects of the existing view angle switching mode are overcome.
Drawings
Fig. 1 is a schematic cross-sectional view of a conventional liquid crystal display device under wide viewing angle display.
Fig. 2 is a schematic cross-sectional view of the liquid crystal display device of fig. 1 under a narrow viewing angle display.
FIG. 3 is an exploded view of a liquid crystal display device according to a first embodiment of the present invention.
Fig. 4 is a schematic circuit diagram of the liquid crystal display device in fig. 3.
Fig. 5 is a schematic plan view of a viewing angle control electrode on the first substrate of the liquid crystal display device in fig. 3.
FIG. 6 is a schematic cross-sectional view of the LCD device of FIG. 3 corresponding to a first pixel unit.
FIG. 7 is a schematic cross-sectional view of the LCD device of FIG. 3 corresponding to a second pixel unit.
Fig. 8a to 8c are schematic arrangement diagrams of pixel units of the liquid crystal display device in fig. 3.
Fig. 9a to 9f are views of perspective simulation of the lcd device of fig. 3 under different viewing angle modes.
Fig. 10a and 10b are schematic plan views of the liquid crystal display device in fig. 3.
Fig. 11a to 11c are schematic arrangements of pixel units of a liquid crystal display device in a second embodiment.
Fig. 12 is a schematic plan view of a viewing angle controlling electrode on the first substrate in the second embodiment.
Fig. 13a to 13c are schematic pixel unit arrangement diagrams of a liquid crystal display device in a third embodiment.
Fig. 14 is a schematic plan view of a viewing angle controlling electrode on the first substrate in the third embodiment.
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. 3 to 5, a liquid crystal display device according to a first embodiment of the invention includes a display panel 20, where the display panel 20 includes a first substrate 21, a second substrate 22 disposed opposite to the first substrate 21, and a liquid crystal layer 23 disposed between the first substrate 21 and the second substrate 22. The first substrate 21 may be a color film substrate, and the second substrate 22 may be a thin film transistor array substrate.
Referring to fig. 6 to 7, the first substrate 21 is provided with a color resist layer 211, a Black Matrix (BM)212, a planarization layer 213 and a viewing angle control electrode 214 on a side facing the liquid crystal layer 23. The color resist layer 211 is, for example, R, G, B color resist. In this embodiment, the color resist layer 211 and the black matrix 212 are disposed on the surface of the first substrate 21 on the side facing the liquid crystal layer 23, the planarization layer 213 is disposed on the color resist layer 211 and the black matrix 212, and the viewing angle control electrode 214 is disposed on the planarization layer 213, but the present invention is not limited to this structure and order.
The second substrate 22 is provided with a scan line 221, a data line 222, an active element array, a common electrode 224 and a pixel electrode 225 on a side facing the liquid crystal layer 23, but the present invention is not limited to this structure and order. The active element array is, for example, a TFT array including a plurality of TFTs 223 distributed in an array. On the second substrate 22, a plurality of pixel units arranged in an array are defined by the mutually insulated and crossed of the plurality of scanning lines 221 and the plurality of data lines 222. A TFT 223 and a pixel electrode 225 are provided in each pixel unit. It is understood that each TFT 223 includes a gate electrode electrically connected to the corresponding scan line 221, an active layer electrically connected to the corresponding data line 222, a source electrode electrically connected to the corresponding pixel electrode 225, and a drain electrode electrically connected to the corresponding pixel electrode 225.
In this embodiment, the liquid crystal display device is described by taking Fringe Field Switching (FFS) as an example, the common electrode 224 and the pixel electrode 225 are both formed on the same substrate (i.e., an array substrate), and when an electric Field for display is applied between the common electrode 224 and the pixel electrode 225, liquid crystal molecules rotate in a plane substantially parallel to the substrate to obtain a wide viewing angle.
In this embodiment, the common electrode 224 and the pixel electrode 225 are located on different layers on the second substrate 22, and an insulating layer 226 is interposed therebetween, so that the common electrode 224 and the pixel electrode 225 are insulated from each other. The pixel electrode 225 may be located above the common electrode 224, i.e., the pixel electrode 225 is closer to the liquid crystal layer 23 than the common electrode 224 (as in the present embodiment), but is not limited thereto. In other embodiments, the pixel electrode 225 may also be located below the common electrode 224, i.e., the common electrode 224 is closer to the liquid crystal layer 23 than the pixel electrode 225.
In addition, the liquid crystal display device may also adopt an In-Plane Switching (IPS) mode, that is, the common electrode 224 and the pixel electrode 225 may be located In the same layer, and at this time, the common electrode 224 and the pixel electrode 225 may be respectively made into a comb-like structure having a plurality of electrode strips and are inserted and matched with each other.
In this embodiment, only the film layer structures relevant to the present invention are illustrated on the first substrate 21 and the second substrate 22, and the film layer structures not relevant to the present invention are omitted. It is understood that the structure on the first substrate 21 and the second substrate 22 and the sequence of the film layers are not limited to this embodiment.
Referring to fig. 4 and 8a, the pixel cells on the second substrate 22 are divided into two types, i.e., a first pixel cell P1 and a second pixel cell P2. In this embodiment, the first pixel units P1 are arranged in a plurality of rows along the horizontal direction, the second pixel units P2 are also arranged in a plurality of rows along the horizontal direction, the plurality of rows of first pixel units P1 and the plurality of rows of second pixel units P2 are arranged in a staggered manner, that is, the plurality of rows of first pixel units P1 are located in the odd-numbered rows, and the plurality of rows of second pixel units P2 are located in the even-numbered rows (as shown in fig. 4 and 8 a); alternatively, the plurality of rows of the first pixel units P1 are located at even rows, and the plurality of rows of the second pixel units P2 are located at odd rows.
Referring to fig. 4, the pixel electrodes 225 on the second substrate 22 are also divided into two types, namely, a first pixel electrode 225a and a second pixel electrode 225b, wherein the first pixel electrode 225a is disposed in each first pixel unit P1, and the second pixel electrode 225b is disposed in each second pixel unit P2. The first pixel electrode 225a includes a plurality of first pixel electrode stripes 2251 spaced apart from each other, and a first slit 2252 is formed between adjacent first pixel electrode stripes 2251. The second pixel electrode 225b includes a plurality of second pixel electrode stripes 2253 spaced apart from each other, and a second slit 2254 is formed between the adjacent second pixel electrode stripes 2253.
Preferably, the plurality of first pixel electrode stripes 2251 extend in a vertical direction, the plurality of second pixel electrode stripes 2253 extend in a horizontal direction, and the plurality of first pixel electrode stripes 2251 and the plurality of second pixel electrode stripes 2253 extend in a direction perpendicular to each other.
The viewing angle control electrode 214 on the first substrate 21 is used to apply a viewing angle control voltage to control the display panel 20 to switch between a wide viewing angle and a narrow viewing angle. As shown in fig. 4 and 5, the viewing angle control electrode 214 is divided into two parts, i.e., a first electrode part 214a and a second electrode part 214b, which are insulated from each other, wherein the first electrode part 214a corresponds to cover each of the first pixel cells P1, and the second electrode part 214b corresponds to cover each of the second pixel cells P2.
In this embodiment, the first electrode portion 214a includes a plurality of first viewing angle control electrode strips 2141 extending along the horizontal direction, and each first viewing angle control electrode strip 2141 correspondingly covers one row of the first pixel units P1; the second electrode portion 214b includes a plurality of second viewing angle control electrode strips 2142 extending along the horizontal direction, and each second viewing angle control electrode strip 2142 correspondingly covers one row of the second pixel units P2. Further, the first electrode portion 214a further includes a first conductive strip 2143 electrically connected to the plurality of first viewing angle control electrode strips 2141, and the second electrode portion 214b further includes a second conductive strip 2144 electrically connected to the plurality of second viewing angle control electrode strips 2142, such that the first electrode portion 214a and the second electrode portion 214b are respectively in a comb-like structure and are mutually inserted and matched.
The viewing angle control electrode 214, the common electrode 224, and the pixel electrode 225 may be specifically made of a transparent conductive material such as Indium Tin Oxide (ITO), Indium Zinc Oxide (IZO), or the like. The viewing angle control electrode 214 is used for applying a viewing angle control voltage to control the display panel 20 to perform wide and narrow viewing angle switching; the common electrode 224 is used for applying a common voltage signal (i.e., Vcom) for picture display; the pixel electrode 225 is used for receiving a data voltage signal (i.e., Vdata) to display a picture.
Liquid crystal molecules are generally classified into positive liquid crystal molecules and negative liquid crystal molecules. In this embodiment, the liquid crystal molecules in the liquid crystal layer 23 are positive liquid crystal molecules, and the positive liquid crystal molecules have the advantage of fast response.
Referring to fig. 3 and 4, the alignment direction of the position on the first substrate 21 corresponding to each first pixel cell P1 is a1, the alignment direction of the position on the second substrate 22 corresponding to each first pixel cell P1 is B1, and the alignment directions a1 and B1 of the positions on the first substrate 21 and the second substrate 22 corresponding to each first pixel cell P1 extend along the vertical direction. Both alignment directions a1, B1 may be parallel or anti-parallel (anti-parallel in this embodiment).
The alignment direction of the position on the first substrate 21 corresponding to each second pixel cell P2 is a2, the alignment direction of the position on the second substrate 22 corresponding to each second pixel cell P2 is B2, and the alignment directions a2 and B2 of the positions on the first and second substrates 21 and 22 corresponding to each second pixel cell P2 are extended along the horizontal direction. Both alignment directions a2, B2 may be parallel or anti-parallel (anti-parallel in this embodiment).
The liquid crystal molecules in the liquid crystal layer 23 are initially aligned in the alignment directions a1 and B1, i.e., in the vertical direction, in the first pixel cell P1. The liquid crystal molecules in the liquid crystal layer 23 are initially aligned along the alignment directions a2 and B2, i.e., along the horizontal direction, in the second pixel cell P2. The initial alignment directions of the liquid crystal molecules in the first and second pixel cells P1 and P2 are perpendicular to each other.
Specifically, the first substrate 21 and the second substrate 22 may be aligned in different directions by using a photo-alignment and a mask plate, and initially, the mask plate is used to cover the region corresponding to each second pixel unit P2, and the photo-alignment is performed on the region corresponding to each first pixel unit P1; after the alignment of the region corresponding to each first pixel unit P1 is completed, the region corresponding to each first pixel unit P1 is covered by a mask plate, and the region corresponding to each second pixel unit P2 is photo-aligned, so as to form an initial multi-alignment.
By applying different viewing angle control voltages to the first electrode portion 214a or the second electrode portion 214b of the viewing angle control electrode 214, different voltage differences can be generated between the first electrode portion 214a and the common electrode 224 or between the second electrode portion 214b and the common electrode 224, that is, different tilt angles of liquid crystal molecules can be controlled, so that the adjustment of the viewing angle of the liquid crystal display device can be realized, and specifically, the following four viewing angle modes can be provided:
wide view angle mode: the first electrode portion 214a and the second electrode portion 214b both apply the same voltage signal as the common electrode 224 (or the voltage difference with respect to the common electrode 224 is small), that is, when there is no voltage difference (the voltage difference is 0V) or a small voltage difference (for example, the voltage difference is less than 1V) between the first electrode portion 214a and the common electrode 224, and there is no voltage difference or a small voltage difference between the second electrode portion 214b and the common electrode 224, the normal wide viewing angle mode is performed. In the wide viewing angle mode, the voltage difference between the first electrode portion 214a and the common electrode 224 and between the second electrode portion 214b and the common electrode 224 are preferably 0V, for example, a DC common voltage (DC Vcom) is applied to the common electrode 224, and a DC voltage equal to the DC Vcom is applied to both the first electrode portion 214a and the second electrode portion 214 b.
Peep prevention at the upper, lower, left and right sides: when a voltage signal having a large voltage difference with respect to the common electrode 224 is applied to both the first electrode portion 214a and the second electrode portion 214b, that is, a large voltage difference (for example, a voltage difference larger than 2V) exists between the first electrode portion 214a and the common electrode 224, and a large voltage difference also exists between the second electrode portion 214b and the common electrode 224, a strong vertical electric field is generated between the first substrate 21 and the second substrate 22 in the entire liquid crystal cell, so that liquid crystal molecules in regions corresponding to each of the first pixel units P1 and each of the second pixel units P2 are driven to deflect at a large angle, light leakage occurs in oblique viewing of the display screen, the contrast ratio is reduced in the oblique viewing direction, and the viewing angle is narrowed, at this time, the liquid crystal display device has a narrow viewing angle in both the up-down direction and the left-right direction, and thus realizes peeping prevention in both.
Peep-proof from left to right and up and down: when the first electrode portion 214a applies the same voltage signal as the common electrode 224 (or the voltage difference with respect to the common electrode 224 is smaller), and the second electrode portion 214b applies a voltage signal having a larger voltage difference with respect to the common electrode 224, that is, when there is no voltage difference or a smaller voltage difference between the first electrode portion 214a and the common electrode 224, and there is a larger voltage difference between the second electrode portion 214b and the common electrode 224, a stronger vertical electric field is generated in a local region corresponding to each second pixel unit P2 in the liquid crystal cell, so that liquid crystal molecules in a region corresponding to each second pixel unit P2 are driven to generate a larger angle deflection, and the liquid crystal display device realizes a narrow viewing angle in the left-right direction, but the up-down direction is still a wide viewing angle at this time, thereby realizing left-right peep prevention and up-down peep prevention.
Peep-proof up and down, peep-proof left and right: when a voltage signal with a larger voltage difference relative to the common electrode 224 is applied to the first electrode portion 214a, and a voltage signal identical to the voltage signal applied to the common electrode 224 (or the voltage difference relative to the common electrode 224 is smaller) is applied to the second electrode portion 214b (i.e., a larger voltage difference exists between the first electrode portion 214a and the common electrode 224, and a smaller voltage difference exists between the second electrode portion 214b and the common electrode 224, a stronger vertical electric field is generated in a local region corresponding to each first pixel unit P1 in a liquid crystal cell, so that liquid crystal molecules in a region corresponding to each first pixel unit P1 are driven to generate a larger angle deflection, and the liquid crystal display device realizes a narrow viewing angle in the up-down direction, but the left-right direction is still a wide viewing angle, so that up-down peeping prevention and left-right peeping prevention are realized.
The above table shows the viewing angle simulation results in different modes, and the voltage signal (Vcom) applied to the common electrode 224 is set to 0V. Wherein:
in the wide viewing angle mode, the voltage signals applied to the first electrode portion 214a and the second electrode portion 214b are all 0V, and each of the first pixel unit P1 and each of the second pixel unit P2 displays normally (i.e. the data voltage signals between 0V and 3.6V are applied to the first pixel electrode 225a and the second pixel electrode 225b respectively), and the viewing angle at the wide viewing angle is simulated as shown in fig. 9 a.
In the up-down and left-right peep-proof mode, the voltage signals applied to the first electrode part 214a and the second electrode part 214b are both 4V, each first pixel unit P1 and each second pixel unit P2 display normally (namely, the data voltage signals between 0 and 3.6V are respectively applied to the first pixel electrode 225a and the second pixel electrode 225b), when the contrast is greater than or equal to 2, the corresponding viewing angles in the up-down/left-right directions are respectively 40 °, 35 °, and 40 °, that is, the narrow viewing angle display effect is realized in the up-down and left-right directions, and the viewing angle simulation in the up-down and left-right peep-proof is shown in fig. 9 b.
In the left-right peep-proof mode, the voltage signal applied to the first electrode portion 214a is 0V, and the voltage signal applied to the second electrode portion 214b is 4V, which simulates two situations, namely, left-right peep-proof-1 and left-right peep-2, in which the left-right peep-proof-1 is the left-right peep-proof effect when each first pixel unit P1 and each second pixel unit P2 are normally displayed (i.e., the data voltage signal between 0 to 3.6V is respectively applied to the first pixel electrode 225a and the second pixel electrode 225b), when the contrast is greater than or equal to 2, the corresponding viewing angles in the up/down/left/right directions are respectively 85 °, 40 °, and 45 °, that is, when the contrast is greater than or equal to 2, the narrow viewing angle display effect is realized in the left-right direction, and the viewing angle simulation in the left-right peep-1 is as shown in fig. 9 c.
As shown in fig. 8b, the left-right peep-proof-2 is a left-right peep-proof effect when each second pixel unit P2 normally displays (i.e. the second pixel electrode 225b applies a data voltage signal of 0-3.6V), but each first pixel unit P1 is turned off (i.e. the first pixel electrode 225a always applies a 0V voltage signal), and when the contrast is greater than or equal to 2, the corresponding viewing angles in the up/down/left/right directions are respectively 85 °, 30 °, and 35 °, i.e. when the contrast is greater than or equal to 2, a better narrow viewing angle display effect is achieved compared with the left-right peep-1 in the left-right direction, and the viewing angle simulation in the left-right peep-2 is shown in fig. 9 d. It can be seen that, when left-right peeping prevention is implemented, the first pixel units P1 are turned off, and the first pixel units P1 always display a black picture, but the second pixel units P2 normally display, so that the peeping prevention effect is better than that when the first pixel units P1 are not turned off, and the peeping prevention angle can be increased by more than 10 °.
In the up-down peep-proof mode, the voltage signal applied to the first electrode portion 214a is 4V, and the voltage signal applied to the second electrode portion 214b is 0V, which simulates two situations, i.e., an up-down peep-proof-1 and an up-down peep-proof-2, in which the up-down peep-proof-1 is the up-down peep-proof effect when each first pixel unit P1 and each second pixel unit P2 are normally displayed (the data voltage signal between 0 to 3.6V is applied to the first pixel electrode 225a and the second pixel electrode 225b respectively), when the contrast is greater than or equal to 2, the corresponding viewing angles in the up/down/left/right directions are respectively 45 °, 85 °, that is, the narrow viewing angle display effect is achieved in the up-down direction, and the viewing angle simulation in the up-down peep-1 is shown in fig. 9 e.
As shown in fig. 8c, the up-and-down peep-proof-2 is an up-and-down peep-proof effect when each first pixel unit P1 normally displays (i.e. the first pixel electrode 225a applies a data voltage signal of 0-3.6V), but each second pixel unit P2 is turned off (i.e. the second pixel electrode 225b always applies a 0V voltage signal), when the contrast is greater than or equal to 2, the corresponding viewing angles in the up/down/left/right directions are respectively 25 °, 30 °, 85 °, and 85 °, that is, when the contrast is greater than or equal to 2, the better narrow viewing angle display effect is achieved by comparing the up-and-down peep-1 in the up-and-down direction, and the viewing angle simulation in the up-and-down peep-2 is as shown in fig. 9. It can be seen that, when the up-down peep prevention is implemented, the second pixel units P2 are turned off, and the second pixel units P2 always display a black picture, but the first pixel units P1 normally display, the peep prevention effect is better than that when the second pixel units P2 are not turned off, and the peep prevention angle can be improved by more than 10 °.
As shown in fig. 10a to 10b, the liquid crystal display device further includes a driving circuit 40, and the first electrode portion 214a and the second electrode portion 214b of the viewing angle control electrode 214 are electrically connected to the driving circuit 40, respectively, and since the first electrode portion 214a and the second electrode portion 214b are insulated from each other, the driving circuit 40 can apply a viewing angle control voltage to the first electrode portion 214a and the second electrode portion 214b, respectively.
In order to apply a voltage to the viewing angle control electrode 214 on the first substrate 21, in the peripheral non-display area of the liquid crystal display device, the first electrode portion 214a or the second electrode portion 214b of the viewing angle control electrode 214 is electrically conducted from the first substrate 21 to the second substrate 22 through a conductive adhesive (not shown), the driving circuit 40 provides a viewing angle control voltage to the second substrate 22, and the second substrate 22 applies the viewing angle control voltage to the first electrode portion 214a or the second electrode portion 214b of the viewing angle control electrode 214 of the first substrate 21 through the conductive adhesive.
Referring to fig. 10a and 10b, the lcd device further includes a viewing angle switch 60 for switching different viewing angle modes of the lcd device. The view switching key 60 may be a physical key (as shown in fig. 10 a), or may be a software control or application program (APP) to implement a switching function (as shown in fig. 10b, a wide view and a narrow view are set by a slider). When a user needs to switch a wide viewing angle and a narrow viewing angle, a viewing angle switching request can be sent to the liquid crystal display device by operating the viewing angle switching key 60, and finally, the driving circuit 40 controls the voltage applied to the viewing angle control electrode 214, and when the voltage difference between the viewing angle control electrode 214 and the common electrode 224 is different, the viewing angle of the liquid crystal display device is also different. In particular, in the present embodiment, the driving circuit 40 can respectively control the voltages applied to the first electrode portion 214a or the second electrode portion 214b of the viewing angle control electrode 214 to change the voltage difference between the first electrode portion 214a and the common electrode 224 or between the second electrode portion 214b and the common electrode 224, so that the user can select to realize a narrow viewing angle in the up-down or left-right directions according to different peep-proof requirements, and can also realize a narrow viewing angle in the up-down and left-right directions at the same time, and thus the liquid crystal display device of the embodiment of the present invention has strong operation flexibility and convenience.
In this embodiment, by controlling the voltage applied to the first electrode portion 214a or the second electrode portion 214b of the viewing angle control electrode 214, different voltage differences can be generated between the first electrode portion 214a and the common electrode 224 or between the second electrode portion 214b and the common electrode 224, and different deflection angles of liquid crystal molecules can be controlled, so as to adjust the viewing angle of the liquid crystal display device, so that one liquid crystal display screen can realize controllable viewing angles in the left-right direction or in the up-down direction, and can also realize controllable viewing angles in the up-down direction and in the left-right direction at the same time.
[ second embodiment ]
Referring to fig. 11a to 11c, in the embodiment, the first pixel units P1 are arranged in a plurality of columns along the vertical direction, the second pixel units P2 are also arranged in a plurality of columns along the vertical direction, the plurality of columns of first pixel units P1 are staggered with the plurality of columns of second pixel units P2, that is, the plurality of columns of first pixel units P1 are located in odd columns, and the plurality of columns of second pixel units P2 are located in even columns (as shown in fig. 11 a); alternatively, the columns of the first pixel units P1 are located at even columns, and the columns of the second pixel units P2 are located at odd columns.
In this embodiment, the pixel electrodes on the second substrate are also classified into two types, i.e., a first pixel electrode disposed in each of the first pixel cells P1 and a second pixel electrode disposed in each of the second pixel cells P2. The first pixel electrode comprises a plurality of first pixel electrode strips which are spaced from each other, and a first slit is formed between every two adjacent first pixel electrode strips. The second pixel electrode comprises a plurality of second pixel electrode strips which are spaced from each other, and a second slit is formed between every two adjacent second pixel electrode strips. Preferably, the plurality of first pixel electrode stripes extend along a vertical direction, the plurality of second pixel electrode stripes extend along a horizontal direction, and the extending directions of the plurality of first pixel electrode stripes and the plurality of second pixel electrode stripes are perpendicular to each other.
In the present embodiment, as shown in fig. 12, the viewing angle control electrode 214 is divided into two parts, i.e., a first electrode part 214a and a second electrode part 214b, which are insulated from each other, wherein the first electrode part 214a covers each of the first pixel cells P1, and the second electrode part 214b covers each of the second pixel cells P2.
In this embodiment, the first electrode portion 214a includes a plurality of first viewing angle control electrode strips 2141 extending along the vertical direction, and each first viewing angle control electrode strip 2141 correspondingly covers one row of the first pixel units P1; the second electrode portion 214b includes a plurality of second viewing angle control electrode strips 2142 extending along the vertical direction, and each second viewing angle control electrode strip 2142 correspondingly covers one column of the second pixel units P2. Further, the first electrode portion 214a further includes a first conductive strip 2143 electrically connected to the plurality of first viewing angle control electrode strips 2141, and the second electrode portion 214b further includes a second conductive strip 2144 electrically connected to the plurality of second viewing angle control electrode strips 2142, such that the first electrode portion 214a and the second electrode portion 214b are respectively in a comb-like structure and are mutually inserted and matched.
In the present embodiment, the liquid crystal molecules in the liquid crystal layer 23 are initially aligned in the vertical direction in the first pixel unit P1, and the liquid crystal molecules in the liquid crystal layer 23 are initially aligned in the horizontal direction in the second pixel unit P2. The initial alignment directions of the liquid crystal molecules in the first and second pixel cells P1 and P2 are perpendicular to each other.
Based on the same principle as the first embodiment, the present embodiment can have four viewing angle modes, i.e., a wide viewing angle mode, an upper-lower-left-right peep-proof mode, a left-right peep-proof mode, and an upper-lower peep-proof mode, by applying different viewing angle control voltages to the first electrode portion 214a or the second electrode portion 214b of the viewing angle control electrode 214.
When displaying a wide viewing angle and displaying both the top, bottom, left and right privacy mode, each of the first pixel cells P1 and each of the second pixel cells P2 are normally displayed, i.e., the first pixel electrodes and the second pixel electrodes respectively apply a data voltage signal of between 0V and 3.6V, as shown in fig. 11 a.
When the left-right peep-proof mode is displayed, each second pixel unit P2 can be made to display normally (i.e. the second pixel electrode applies a data voltage signal between 0V and 3.6V), but each first pixel unit P1 is turned off (i.e. the first pixel electrode always applies a 0V voltage signal), and each first pixel unit P1 always displays a black picture, as shown in fig. 11b, so as to obtain a better narrow viewing angle display effect in the left-right direction.
When the up-down peep-proof mode is displayed, each first pixel unit P1 can be normally displayed (i.e. the first pixel electrode applies a data voltage signal of 0-3.6V), but each second pixel unit P2 is turned off (i.e. the second pixel electrode always applies a 0V voltage signal), and each second pixel unit P2 always displays a black frame, as shown in fig. 11c, so as to obtain a better narrow viewing angle display effect in the up-down direction.
Compared with the first embodiment, when the display in the left-right peep-proof mode or the up-down peep-proof mode is realized, the data lines 222 in the odd-numbered columns or the even-numbered columns are always supplied with the dark-state voltage, so that the power consumption is low.
Other structures of this embodiment can be seen from the first embodiment, and are not described herein again.
[ third embodiment ]
Referring to fig. 13a to 13c, in the present embodiment, the first pixel units P1 and the second pixel units P2 are distributed, the adjacent positions of each first pixel unit P1 are the second pixel units P2, and the adjacent positions of each second pixel unit P2 are the first pixel units P1. The pixel units connected to the same data line 222 through the TFT 223 are the first pixel unit P1 or the second pixel unit P2 and are alternately distributed on both sides of the data line 222.
In this embodiment, the pixel electrodes on the second substrate are also classified into two types, i.e., a first pixel electrode disposed in each of the first pixel cells P1 and a second pixel electrode disposed in each of the second pixel cells P2. The first pixel electrode comprises a plurality of first pixel electrode strips which are spaced from each other, and a first slit is formed between every two adjacent first pixel electrode strips. The second pixel electrode comprises a plurality of second pixel electrode strips which are spaced from each other, and a second slit is formed between every two adjacent second pixel electrode strips. Preferably, the plurality of first pixel electrode stripes extend along a vertical direction, the plurality of second pixel electrode stripes extend along a horizontal direction, and the extending directions of the plurality of first pixel electrode stripes and the plurality of second pixel electrode stripes are perpendicular to each other.
In the present embodiment, as shown in fig. 14, the viewing angle control electrode 214 is divided into two parts, i.e., a first electrode part 214a and a second electrode part 214b, which are insulated from each other, wherein the first electrode part 214a covers each of the first pixel cells P1, and the second electrode part 214b covers each of the second pixel cells P2.
In this embodiment, the first electrode portion 214a includes a plurality of first viewing angle control electrode strips 2141 extending along a slant direction (e.g., a slant direction of 45 °), where each first viewing angle control electrode strip 2141 correspondingly covers a row of first pixel units P1 in the slant direction; the second electrode portion 214b includes a plurality of second viewing angle control electrode strips 2142 extending along a diagonal direction (e.g., a diagonal direction of 45 °), and each second viewing angle control electrode strip 2142 covers a column of second pixel units P2 in the diagonal direction. Further, the first electrode portion 214a further includes a first conductive strip 2143 electrically connected to the plurality of first viewing angle control electrode strips 2141, and the second electrode portion 214b further includes a second conductive strip 2144 electrically connected to the plurality of second viewing angle control electrode strips 2142, such that the first electrode portion 214a and the second electrode portion 214b are inserted into and mated with each other.
In the present embodiment, the liquid crystal molecules in the liquid crystal layer 23 are initially aligned in the vertical direction in the first pixel unit P1, and the liquid crystal molecules in the liquid crystal layer 23 are initially aligned in the horizontal direction in the second pixel unit P2. The initial alignment directions of the liquid crystal molecules in the first and second pixel cells P1 and P2 are perpendicular to each other.
Based on the same principle as the first embodiment, the present embodiment can have four viewing angle modes, i.e., a wide viewing angle mode, an upper-lower-left-right peep-proof mode, a left-right peep-proof mode, and an upper-lower peep-proof mode, by applying different viewing angle control voltages to the first electrode portion 214a or the second electrode portion 214b of the viewing angle control electrode 214.
When displaying a wide viewing angle and displaying both the top, bottom, left and right privacy mode, each of the first pixel cells P1 and each of the second pixel cells P2 are normally displayed, i.e., the first pixel electrodes and the second pixel electrodes respectively apply a data voltage signal of between 0V and 3.6V, as shown in fig. 13 a.
When the left-right peep-proof mode is displayed, each second pixel unit P2 can be made to display normally (i.e. the second pixel electrode applies a data voltage signal between 0V and 3.6V), but each first pixel unit P1 is turned off (i.e. the first pixel electrode always applies a 0V voltage signal), and each first pixel unit P1 always displays a black picture, as shown in fig. 13b, so as to obtain a better narrow viewing angle display effect in the left-right direction.
When the up-down peep-proof mode is displayed, each first pixel unit P1 can be normally displayed (i.e. the first pixel electrode applies a data voltage signal of 0-3.6V), but each second pixel unit P2 is turned off (i.e. the second pixel electrode always applies a 0V voltage signal), and each second pixel unit P2 always displays a black frame, as shown in fig. 13c, so as to obtain a better narrow viewing angle display effect in the up-down direction.
Compared with the first embodiment and the second embodiment, the present embodiment has good display quality, and when the display is implemented in the left-right peep-proof mode or the up-down peep-proof mode, the data lines 222 in the odd-numbered columns or the even-numbered columns are always supplied with the dark-state voltage, so the power consumption is also low.
Other structures of this embodiment can be seen from the first embodiment, and are not described herein again.
[ fourth embodiment ]
The multi-view controllable liquid crystal display device has a wide view angle mode, an upper and lower and left and right peep prevention mode, a left and right peep prevention mode and an upper and lower peep prevention mode, and the invention also provides a method for driving the liquid crystal display device, which comprises the following steps:
in the wide viewing angle mode, a voltage signal that is the same as the common electrode 224 or has a small voltage difference with respect to the common electrode 224 is applied to both the first electrode portion 214a and the second electrode portion 214 b;
in the top-bottom-left-right peep prevention mode, a voltage signal having a large voltage difference with respect to the common electrode 224 is applied to both the first electrode portion 214a and the second electrode portion 214 b;
in the left-right peep-proof mode, a voltage signal that is the same as the common electrode 224 or has a smaller voltage difference with respect to the common electrode 224 is applied to the first electrode portion 214a, and a voltage signal having a larger voltage difference with respect to the common electrode 224 is applied to the second electrode portion 214 b;
in the up-down peep prevention mode, a voltage signal that is the same as the common electrode 224 or has a small voltage difference with respect to the common electrode 224 is applied to the second electrode portion 214b, and a voltage signal having a large voltage difference with respect to the common electrode 224 is applied to the first electrode portion 214 a.
Further, in the wide viewing angle mode and the top-bottom-left-right privacy mode, the respective first pixel cells P1 and the respective second pixel cells P2 are driven for normal display; in the left-right peep-proof mode, each second pixel cell P2 is driven for normal display, but each first pixel cell P1 is turned off; in the up-down peep-proof mode, each of the first pixel cells P1 is driven for normal display, but each of the second pixel cells P2 is turned off.
Further, the liquid crystal display device includes a drive circuit 40, and the first electrode portion 214a and the second electrode portion 214b are electrically connected to the drive circuit 40, respectively, and a desired voltage signal is applied to the first electrode portion 214a and the second electrode portion 214b by the drive circuit 40, respectively.
Further, the liquid crystal display device is provided with a viewing angle switching key 60 for switching different viewing angle modes of the liquid crystal display device.
The driving method of the present embodiment is the same as the liquid crystal display device in the above embodiments, and further details of the driving method can be referred to the description of the liquid crystal display device in the above embodiments, and are not repeated herein.
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 (11)
1. A multi-view controllable liquid crystal display device comprises a first substrate (21), a second substrate (22) arranged opposite to the first substrate (21), and a liquid crystal layer (23) arranged between the first substrate (21) and the second substrate (22), wherein a view control electrode (214) is arranged on the first substrate (21), a common electrode (224) and a pixel electrode (225) are arranged on the second substrate (22), a plurality of pixel units are defined and formed on the second substrate (22) by scanning lines (221) and data lines (222), the multi-view controllable liquid crystal display device is characterized in that the plurality of pixel units are divided into two types and comprise a first pixel unit (P1) and a second pixel unit (P2), each first pixel unit (P1) is arranged in a plurality of columns along the vertical direction, each second pixel unit (P2) is also arranged in a plurality of columns along the vertical direction, the plurality of columns of first pixel units (P1) and the plurality of columns of second pixel units (P2) are arranged in a staggered manner, the liquid crystal molecules in the liquid crystal layer (23) are initially aligned in a vertical direction in the first pixel unit (P1), the liquid crystal molecules in the liquid crystal layer (23) are initially aligned in a horizontal direction in the second pixel unit (P2), the viewing angle control electrode (214) comprises a first electrode part (214a) and a second electrode part (214b) which are insulated from each other, the first electrode part (214a) correspondingly covers each first pixel unit (P1), and the second electrode part (214b) correspondingly covers each second pixel unit (P2).
2. The multi-view controllable LCD device of claim 1, wherein the first electrode portion (214a) comprises a plurality of first view control electrode strips (2141) extending along a vertical direction, each first view control electrode strip (2141) correspondingly covers one row of the first pixel units (P1), the second electrode portion (214b) comprises a plurality of second view control electrode strips (2142) extending along a vertical direction, each second view control electrode strip (2142) correspondingly covers one row of the second pixel units (P2).
3. A multi-view controllable liquid crystal display device comprises a first substrate (21), a second substrate (22) arranged opposite to the first substrate (21), and a liquid crystal layer (23) arranged between the first substrate (21) and the second substrate (22), wherein a view control electrode (214) is arranged on the first substrate (21), a common electrode (224) and a pixel electrode (225) are arranged on the second substrate (22), a plurality of pixel units are defined and formed on the second substrate (22) by scanning lines (221) and data lines (222), the multi-view controllable liquid crystal display device is characterized in that the plurality of pixel units are divided into two types, including a first pixel unit (P1) and a second pixel unit (P2), each first pixel unit (P1) and each second pixel unit (P2) are dispersed, and the upper, lower, left and right adjacent positions of each first pixel unit (P1) are second pixel units (P2), the upper, lower, left and right adjacent positions of each second pixel unit (P2) are all first pixel units (P1), and all the pixel units connected with the same data line (222) are all first pixel units (P1) or second pixel units (P2) and are alternately distributed at two sides of the data line (222); the liquid crystal molecules in the liquid crystal layer (23) are initially aligned in a vertical direction in the first pixel unit (P1), the liquid crystal molecules in the liquid crystal layer (23) are initially aligned in a horizontal direction in the second pixel unit (P2), the viewing angle control electrode (214) comprises a first electrode part (214a) and a second electrode part (214b) which are insulated from each other, the first electrode part (214a) correspondingly covers each first pixel unit (P1), and the second electrode part (214b) correspondingly covers each second pixel unit (P2).
4. The multi-view controllable LCD device of claim 3, wherein the first electrode portion (214a) comprises a plurality of first view control electrode strips (2141) extending along the oblique direction, each first view control electrode strip (2141) correspondingly covers a row of first pixel cells (P1) in the oblique direction, the second electrode portion (214b) comprises a plurality of second view control electrode strips (2142) extending along the oblique direction, each second view control electrode strip (2142) correspondingly covers a row of second pixel cells (P2) in the oblique direction.
5. The multi-view controllable lcd device of any one of claims 1 to 4, wherein the pixel electrodes (225) are divided into two categories, including a first pixel electrode (225a) and a second pixel electrode (225b), the first pixel electrode (225a) is disposed in each first pixel unit (P1), the second pixel electrode (225b) is disposed in each second pixel unit (P2), the first pixel electrode (225a) comprises a plurality of first pixel electrode stripes (2251) spaced apart from each other, the second pixel electrode (225b) comprises a plurality of second pixel electrode stripes (2253) spaced apart from each other, and the plurality of first pixel electrode stripes (2251) and the plurality of second pixel electrode stripes (2253) extend in directions perpendicular to each other.
6. The multi-view controllable lcd device of claim 5, wherein the plurality of first pixel electrode stripes (2251) extend in a vertical direction and the plurality of second pixel electrode stripes (2253) extend in a horizontal direction.
7. The controllably multi-view lcd device as claimed in claim 2 or 4, wherein the first electrode portion (214a) further comprises a first conductive strip (2143) electrically connected to the first view angle control electrode strips (2141), the second electrode portion (214b) further comprises a second conductive strip (2144) electrically connected to the second view angle control electrode strips (2142), and the first electrode portion (214a) and the second electrode portion (214b) are inserted into each other.
8. A driving method of a multi-view controllable liquid crystal display device according to any one of claims 1 to 7, the driving method comprising:
in a wide viewing angle mode, applying a voltage signal that is the same as the common electrode (224) or has a small voltage difference with respect to the common electrode (224) to both the first electrode portion (214a) and the second electrode portion (214 b);
in a peep-proof mode, voltage signals with a large voltage difference relative to the common electrode (224) are applied to the first electrode part (214a) and the second electrode part (214 b);
in a left-right peep-proof mode, a voltage signal which is the same as the common electrode (224) or has a smaller voltage difference relative to the common electrode (224) is applied to the first electrode part (214a), and a voltage signal having a larger voltage difference relative to the common electrode (224) is applied to the second electrode part (214 b);
in the up-down peep-proof mode, a voltage signal which is the same as the common electrode (224) or has a small voltage difference with respect to the common electrode (224) is applied to the second electrode portion (214b), and a voltage signal having a large voltage difference with respect to the common electrode (224) is applied to the first electrode portion (214 a).
9. The driving method of a multi-view controllable liquid crystal display device according to claim 8, wherein each of the first pixel cells (P1) and each of the second pixel cells (P2) are driven to perform normal display in a wide view mode and in both top, bottom, left and right privacy modes; in the left-right peep-proof mode, driving each second pixel unit (P2) to perform normal display, but closing each first pixel unit (P1); in the up-down peep-proof mode, each first pixel cell (P1) is driven for normal display, but each second pixel cell (P2) is turned off.
10. The method of claim 8, further comprising a driving circuit (40), wherein the first electrode portion (214a) and the second electrode portion (214b) are electrically connected to the driving circuit (40), and the driving circuit (40) is used to apply a desired voltage signal to the first electrode portion (214a) and the second electrode portion (214 b).
11. The driving method of a multi-view controllable LCD device according to claim 8, wherein the LCD device is provided with a view switching button (60) for switching different viewing angle modes of the LCD device.
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Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108564926B (en) * | 2018-01-04 | 2020-10-30 | 昆山龙腾光电股份有限公司 | Drive circuit and display device |
| CN108490696B (en) * | 2018-05-11 | 2021-03-23 | 昆山龙腾光电股份有限公司 | Liquid crystal display device and visual angle switching method thereof |
| CN108957874B (en) * | 2018-07-10 | 2022-04-22 | 昆山龙腾光电股份有限公司 | Liquid crystal display device and driving method thereof |
| CN108983462A (en) * | 2018-08-27 | 2018-12-11 | 昆山龙腾光电有限公司 | The driving method of liquid crystal display device |
| CN109188795B (en) * | 2018-10-25 | 2021-12-14 | 昆山龙腾光电股份有限公司 | Liquid crystal display device and driving method thereof |
| CN110376773B (en) * | 2019-07-22 | 2022-02-11 | 昆山龙腾光电股份有限公司 | Driving method of visual angle switchable liquid crystal display device |
| CN110703518B (en) * | 2019-10-30 | 2022-04-22 | 昆山龙腾光电股份有限公司 | Liquid crystal display device and driving method thereof |
| CN111240107A (en) * | 2020-03-18 | 2020-06-05 | 合肥鑫晟光电科技有限公司 | Pixel structure, array substrate, display panel and manufacturing method of display panel |
| CN113589558B (en) * | 2020-04-30 | 2023-04-14 | 荣耀终端有限公司 | Screen peeping prevention method and related device |
| CN113625373A (en) | 2020-05-06 | 2021-11-09 | 中强光电股份有限公司 | Display device, viewing angle limiter and manufacturing method thereof |
| CN113267924B (en) * | 2021-05-07 | 2023-01-10 | 惠州市华星光电技术有限公司 | Display panel and display device |
| CN114326199B (en) * | 2021-12-31 | 2024-04-02 | 厦门天马微电子有限公司 | Display panel and display device |
| CN116360135B (en) * | 2023-05-24 | 2023-08-18 | 惠科股份有限公司 | Peep-proof structure and electronic display device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014206639A (en) * | 2013-04-12 | 2014-10-30 | 株式会社ジャパンディスプレイ | Liquid crystal display device |
| CN104216179A (en) * | 2014-09-12 | 2014-12-17 | 东莞通华液晶有限公司 | Ultra-wide-visual-angle and ultrahigh-contrast-ratio liquid crystal display control method and ultra-wide-visual-angle and ultrahigh-contrast-ratio liquid crystal display structure |
| JP2015152695A (en) * | 2014-02-13 | 2015-08-24 | 三菱電機株式会社 | liquid crystal display device |
| CN106324873A (en) * | 2016-09-22 | 2017-01-11 | 昆山龙腾光电有限公司 | Liquid crystal display device with visual angle switchable, and method for switching visual angle |
-
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014206639A (en) * | 2013-04-12 | 2014-10-30 | 株式会社ジャパンディスプレイ | Liquid crystal display device |
| JP2015152695A (en) * | 2014-02-13 | 2015-08-24 | 三菱電機株式会社 | liquid crystal display device |
| CN104216179A (en) * | 2014-09-12 | 2014-12-17 | 东莞通华液晶有限公司 | Ultra-wide-visual-angle and ultrahigh-contrast-ratio liquid crystal display control method and ultra-wide-visual-angle and ultrahigh-contrast-ratio liquid crystal display structure |
| CN106324873A (en) * | 2016-09-22 | 2017-01-11 | 昆山龙腾光电有限公司 | Liquid crystal display device with visual angle switchable, and method for switching visual angle |
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