CN113359358A

CN113359358A - Liquid crystal display panel and driving method of liquid crystal display panel

Info

Publication number: CN113359358A
Application number: CN202110670994.8A
Authority: CN
Inventors: 刘智
Original assignee: Wuhan China Star Optoelectronics Technology Co Ltd
Current assignee: Wuhan China Star Optoelectronics Technology Co Ltd
Priority date: 2021-06-17
Filing date: 2021-06-17
Publication date: 2021-09-07
Anticipated expiration: 2041-06-17
Also published as: CN113359358B

Abstract

The application provides a liquid crystal display panel and a driving method of the liquid crystal display panel. The liquid crystal display panel comprises a first substrate, a first common electrode, a first pixel electrode and a second pixel electrode. The first common electrode is disposed on one side of the first substrate. The first pixel electrode is positioned on one side of the first common electrode far away from the first substrate. The first pixel electrode extends in a first direction. The second pixel electrode is positioned on one side of the first common electrode far away from the first substrate. The second pixel electrode is insulated from the first pixel electrode. The second pixel electrode extends in a second direction. The second direction intersects the first direction. The liquid crystal display panel can shorten the liquid crystal rotation time, improve the response speed and avoid picture blockage or smear.

Description

Liquid crystal display panel and driving method of liquid crystal display panel

Technical Field

The present disclosure relates to the field of display technologies, and in particular, to a liquid crystal display panel and a driving method of the liquid crystal display panel.

Background

To meet the gaming experience, the display devices pursue high refresh rates of, for example, 120hz, 144hz, 165hz, 240hz, or 300 hz. Under such a high refresh rate, the liquid crystal display panel is required to have a faster response speed, so that the phenomenon of image sticking or smear does not occur.

Disclosure of Invention

In view of the above, the present application aims to provide a liquid crystal display panel and a driving method of the liquid crystal display panel, which can improve response speed.

The application provides a liquid crystal display panel, it includes:

a first substrate;

a first common electrode disposed at one side of the first substrate;

the first pixel electrode is positioned on one side, far away from the first substrate, of the first common electrode and extends along a first direction; and

the second pixel electrode is positioned on one side, far away from the first substrate, of the first common electrode, the second pixel electrode and the first pixel electrode are arranged in an insulating mode, the second pixel electrode extends along a second direction, and the second direction is intersected with the first direction.

In one embodiment, the liquid crystal display panel further includes a second substrate and a second common electrode, the second substrate is disposed opposite to the first substrate, the second common electrode is disposed on a side of the second substrate close to the first substrate, a spacing region is disposed between two adjacent first pixel electrodes, and an orthographic projection of a first portion of the second common electrode on a plane where the first pixel electrodes are located falls into the spacing region.

In one embodiment, an orthographic projection of the second common electrode on a plane on which the first pixel electrode is located falls entirely within the spacing region.

In one embodiment, the first pixel electrode includes a stripe electrode extending along the first direction, the second pixel electrode includes a stripe electrode extending along the second direction, the second pixel electrode is located between the first pixel electrode and the first common electrode, the first pixel electrode is located between the second common electrode and the second pixel electrode, and the second common electrode includes a stripe electrode extending along the first direction.

In one embodiment, the second direction is perpendicular to the first direction.

In one embodiment, an orthogonal projection of a part of the second pixel electrode on a plane where the first pixel electrode is located overlaps with the first pixel electrode, and an orthogonal projection of another part of the second pixel electrode on a plane where the first pixel electrode is located falls into a spacing region between two adjacent first pixel electrodes.

In one embodiment, the first common electrode is a planar electrode, the first pixel electrode includes a stripe-shaped electrode extending in the first direction, and the second pixel electrode includes a stripe-shaped electrode extending in the second direction;

the orthographic projections of the first pixel electrode and the second pixel electrode on the plane of the first common electrode fall within the range of the first common electrode.

In one embodiment, the liquid crystal display panel includes a plurality of pixel regions, and the start time of applying the voltage to the second pixel electrode is later than the start time of applying the voltage to the first pixel electrode in the same pixel region.

In one embodiment, the liquid crystal display panel comprises an array substrate, a color film substrate and liquid crystal arranged between the array substrate and the color film substrate,

the array substrate comprises a first substrate, a first common electrode, a first pixel electrode and a second pixel electrode;

the color film substrate comprises the second substrate, a shading part, color filters and the second common electrode, the shading part and the color filters are arranged on one side, close to the first substrate, of the second substrate, the shading part is arranged between every two adjacent color filters, and the second common electrode is arranged on one side, close to the first substrate, of the color filters.

In one embodiment, each display period of the liquid crystal display panel includes a first phase and a second phase, the start time of the first phase is before the start time of the second phase, and the driving method of the liquid crystal display panel includes:

in the first stage, a first voltage is applied to the first pixel electrode, a first electric field is formed between the first pixel electrode and the first common electrode, and liquid crystal is deflected to display an image;

in the second stage, a second voltage is applied to the second pixel electrode, and a second electric field is formed between the second pixel electrode and the first common electrode, so that the liquid crystal is rotated.

In one embodiment, the liquid crystal display panel further includes a second substrate and a second common electrode, the second substrate is disposed opposite to the first substrate, the second common electrode is disposed on a side of the second substrate close to the first substrate, a spacing region is disposed between two adjacent first pixel electrodes, and an orthographic projection of a first portion of the second common electrode on a plane where the first pixel electrodes are located falls into the spacing region;

in the first stage, a third voltage is applied to the second common electrode, and a third electric field is formed between the first part of the second common electrode and the first pixel electrode to assist the liquid crystal deflection.

In one embodiment, the start time of the second phase is the end time of the first phase.

The liquid crystal display panel is additionally provided with the second pixel electrode, and the extending direction of the first pixel electrode is set to be intersected with the extending direction of the second pixel electrode, so that the two pixel electrodes and the first common electrode can form two electric fields which are intersected in the direction. The two pixel electrodes are driven in a time-sharing mode, so that a first electric field is formed by the first pixel electrode and the first public electrode in a first stage, liquid crystal is deflected to display, a second electric field is formed by the second pixel electrode and the first public electrode in a second stage, liquid crystal is accelerated to rotate to an initial state, the rotation time of the liquid crystal can be shortened, the response speed is improved, and picture blocking or smear is avoided. Further, according to the liquid crystal display panel, the second common electrode is arranged on the color film substrate, the orthographic projection of the first part of the second common electrode on the plane where the first pixel electrodes are located falls into the interval area between two adjacent first pixel electrodes, and the first part of the second common electrode and the first pixel electrodes can form a third electric field in the first stage to assist liquid crystal deflection.

Drawings

In order to more clearly illustrate the technical solutions in the present application, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic plan view of a liquid crystal display panel according to the present application.

FIG. 2 is a schematic cross-sectional view of the first embodiment of the LCD panel of FIG. 1 along line A-A.

Fig. 3 is a schematic top view of an embodiment of a first pixel electrode, a second pixel electrode, a first common electrode, and a second common electrode in the liquid crystal display panel of fig. 2.

Fig. 4 is a schematic top view of another embodiment of the first pixel electrode, the second pixel electrode and the second common electrode in the liquid crystal display panel of fig. 2.

Fig. 5 is a schematic diagram of an electric field of the liquid crystal display panel of fig. 2 in a first stage.

FIG. 6 is a diagram illustrating electric fields in a second phase of the LCD panel of FIG. 2.

Fig. 7 is a schematic view of components of the electric field shown in fig. 5 and 6 on a plane parallel to the array substrate.

Fig. 8 is a schematic plan view illustrating a state change of liquid crystal of the liquid crystal display panel according to the present invention.

Fig. 9 is a schematic top view of one embodiment of the first pixel electrode and the second common electrode in the liquid crystal display panel of fig. 2.

Fig. 10 is a schematic diagram of components of a first electric field formed by the first common electrode and the first pixel electrode and a third electric field formed by the first portion of the second common electrode and the first pixel electrode in the liquid crystal display panel of fig. 2 in a plane parallel to the array substrate.

FIG. 11 is a schematic cross-sectional view taken along line B-B of a second embodiment of a liquid crystal display panel according to the present application.

Fig. 12 is a schematic diagram of a first embodiment of a method for driving a liquid crystal display panel according to the present application.

Fig. 13 (a) is a schematic diagram of a driving waveform of the first pixel electrode according to the first embodiment of the method for driving a liquid crystal display panel of the present application; fig. 13 (b) is a schematic diagram of a driving waveform of the second pixel electrode in the first embodiment of the method for driving a liquid crystal display panel according to the present application.

Fig. 14 is a schematic diagram of a second embodiment of a method for driving a liquid crystal display panel according to the present application.

Fig. 15 (a) is a schematic diagram of a driving waveform of the first pixel electrode in the second embodiment of the driving method of the liquid crystal display panel of the present application; fig. 15 (b) is a schematic diagram of a driving waveform of the second pixel electrode in the second embodiment of the method for driving a liquid crystal display panel according to the present application; fig. 15 (c) is a schematic diagram of a driving waveform of the second common electrode according to the second embodiment of the method for driving a liquid crystal display panel of the present application.

Fig. 16 is a graph of transmittance versus voltage for the prior art and the first embodiment of the lcd panel of the present application simulated by a computer.

Detailed Description

The technical solution in the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. It should be apparent that the described embodiments are only some embodiments of the present application, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any inventive step based on the embodiments in the present application, are within the scope of protection of the present application.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise the first and second features directly, or may comprise the first and second features not being directly connected but being in contact with each other by means of further features between them. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The application provides a liquid crystal display panel. The liquid crystal display panel in the embodiment of the present application may be used in a mobile phone, a tablet computer, a desktop computer, a laptop computer, an electronic reader, a handheld computer, an electronic display screen, a notebook computer, an ultra-mobile personal computer (UMPC), a netbook, a cellular phone, a Personal Digital Assistant (PDA), an Augmented Reality (AR) \ Virtual Reality (VR) device, a media player, a wearable device, a digital camera, a car navigator, and the like.

The liquid crystal display panel comprises a first substrate, a first common electrode, a first pixel electrode and a second pixel electrode. The first common electrode is disposed on one side of the first substrate. The first pixel electrode is positioned on one side of the first common electrode far away from the first substrate. The first pixel electrode extends in a first direction. The second pixel electrode is positioned on one side of the first common electrode far away from the first substrate. The second pixel electrode is insulated from the first pixel electrode. The second pixel electrode extends in a second direction. The second direction intersects the first direction.

The liquid crystal display panel is additionally provided with the second pixel electrode, and the extending direction of the first pixel electrode is set to be intersected with the extending direction of the second pixel electrode, so that the two pixel electrodes and the first common electrode can form two electric fields which are intersected in the direction. The two pixel electrodes are driven in a time-sharing mode, so that a first electric field is formed by the first pixel electrode and the first public electrode in a first stage, liquid crystal is deflected to display, a second electric field is formed by the second pixel electrode and the first public electrode in a second stage, liquid crystal is accelerated to rotate to an initial state, the rotation time of the liquid crystal can be shortened, the response speed is improved, and picture blocking or smear is avoided.

Hereinafter, the liquid crystal display panel of the present application will be described in detail with reference to the drawings.

Referring to fig. 1 and fig. 2, the liquid crystal display panel 100 includes an array substrate 10, a color filter substrate 20, and a liquid crystal 30. The array substrate 10 is disposed opposite to the color filter substrate 20. The liquid crystal 30 is disposed between the array substrate 10 and the color filter substrate 20.

The array substrate 10 includes a first substrate 11, a thin-film transistor layer 12, a planarization layer 13, a first common electrode 14, a first insulating layer 15, a first pixel electrode 16, a second pixel electrode 17, and a second insulating layer 18.

The first substrate 11 may be a rigid substrate such as a glass substrate or a plastic substrate, or may be a flexible substrate. The material of the flexible substrate may be selected from one or more of Polyimide (PI), polyethylene naphthalate (PEN), polyethylene terephthalate (PET), Polyarylate (PAR), Polycarbonate (PC), Polyetherimide (PEI), and Polyethersulfone (PES).

The thin-film transistor layer 12 is disposed on the first substrate 11. The thin-film transistor layer 12 includes thin-film transistors (not shown) for driving the first and

second pixel electrodes

16 and 17. In order to drive the first pixel electrode 16 and the second pixel electrode 17, respectively. Two thin film transistors may be provided in each sub-pixel, one for driving the first pixel electrode 16 and the other for driving the second pixel electrode 17. The thin film transistor includes an active layer, a source electrode, a drain electrode, and a gate electrode. It is to be understood that the present application is not limited to the structure of the thin film transistor included in the thin film transistor layer 12, and the thin film transistor may be a top gate thin film transistor, a bottom gate thin film transistor, or a double gate thin film transistor. The detailed structure of the thin film transistor is not described in detail in the present application.

A planarization layer 13 overlies thin-film-transistor layer 12. The material of the planarization layer 13 may be selected from organic materials such as acrylic resin, epoxy resin, or perfluoroalkoxy resin (PFA).

The first common electrode 14 is disposed on the planarization layer 13. The first common electrode 14 may be a planar electrode. The material of the first common electrode 14 may be a transparent metal oxide material. The transparent metal oxide material may be exemplified by: indium Tin Oxide (ITO), Indium Zinc Oxide (IZO), and the like.

The first insulating layer 15 covers the first common electrode 14. The material of the first insulating layer 15 may be selected from silicon oxide, nitrogen oxide, silicon oxynitride, and a stack thereof.

The first pixel electrode 16 is disposed on the first insulating layer 15. The material of the first pixel electrode 16 may be a transparent metal oxide material. The transparent metal oxide material may be exemplified by: indium Tin Oxide (ITO), Indium Zinc Oxide (IZO), and the like.

The second pixel electrode 17 is disposed between the first pixel electrode 16 and the first common electrode 14. The material of the second pixel electrode 17 may be a transparent metal oxide material. The transparent metal oxide material may be exemplified by: indium Tin Oxide (ITO), Indium Zinc Oxide (IZO), and the like.

The second insulating layer 18 is disposed between the first pixel electrode 16 and the second pixel electrode 17. The first pixel electrode 16 is insulated from the second pixel electrode 17 by a second insulating layer 18. The material of the second insulating layer 18 may be selected from silicon oxide, nitrogen oxide, silicon oxynitride, and a stack thereof.

Referring to fig. 3, the array substrate 10 may include a plurality of first pixel electrodes 16. The plurality of first pixel electrodes 16 each extend in the first direction D1. The plurality of first pixel electrodes 16 are arranged at intervals along the second direction D2. The first direction D1 intersects the second direction D2. In the present embodiment, the first direction D1 is perpendicular to the second direction D2. The array substrate 10 may include a plurality of second pixel electrodes 17. The plurality of second pixel electrodes 17 each extend in the second direction D2. Further, the plurality of second pixel electrodes 17 are arranged at intervals along the first direction D1. That is, the extending direction of the second pixel electrode 17 is the arrangement direction of the first pixel electrodes 16. The extending direction of the first pixel electrode 16 is the arrangement direction of the second pixel electrodes 17. It is understood that a plurality of the first pixel electrodes 16 may be arranged at intervals along a third direction, which is different from the first direction D1. The plurality of second pixel electrodes 17 may be arranged at intervals in a fourth direction, which is different from the second direction D2. That is, the extending direction of the second pixel electrode 17 is different from the arrangement direction of the first pixel electrodes 16. The extending direction of the first pixel electrode 16 and the arrangement direction of the second pixel electrodes 17 are also different.

The first pixel electrode 16 and the second pixel electrode 17 may be stripe electrodes. In conjunction with fig. 4, the first pixel electrode 16 and the second pixel electrode 17 may also be wedge-shaped electrodes. In some embodiments, one of the first pixel electrode 16 and the second pixel electrode 17 is a stripe electrode, and the other is a wedge electrode.

An orthographic projection of one part of the second pixel electrode 17 on the plane of the first pixel electrode 16 is overlapped with the first pixel electrode 16, and an orthographic projection of the other part of the second pixel electrode 17 on the plane of the first pixel electrode 16 falls into a spacing area between two adjacent first pixel electrodes 16. That is, the first pixel electrode 16 intersects the second pixel electrode 17. The orthographic projections of the first pixel electrode 16 and the second pixel electrode 17 on the plane of the first common electrode 14 fall within the range of the first common electrode 14. The first pixel electrode 16 and the second pixel electrode 17 may each form a horizontal electric field with the first common electrode 14. Since the extending directions of the first pixel electrode 16 and the second pixel electrode 17 intersect, horizontal electric fields capable of controlling the deflection or rotation of the liquid crystal in the same region are formed between the first pixel electrode 16 and the first common electrode 14 and between the second pixel electrode 17 and the first common electrode 14, respectively.

Specifically, referring to fig. 5 to 7, the liquid crystal display panel 100 of the present application includes a plurality of pixel regions. Each pixel region includes at least one first pixel electrode 16 and at least one second pixel electrode 17 therein.

The liquid crystal display panel 100 operates as follows:

each display period of the liquid crystal display panel 100 includes a first phase and a second phase. Each display period may be a frame time. The first stage is a stage of deflecting the liquid crystal from an initial state to a display state to display a picture. The second stage is a stage of turning the liquid crystal from the display state to the initial state, that is, a preparation stage of switching from the a image to the B image. The start time of applying the voltage to the second pixel electrode 17 is later than the start time of applying the voltage to the first pixel electrode 16 located in the same pixel region.

In this embodiment, the starting time of the second phase is the ending time of the first phase. I.e. the second stage is directly connected after the first stage. In other embodiments of the present application, the start time of the second phase is not limited to the end time of the first phase. As long as the start time of the first stage precedes the start time of the second stage. For example, the second stage and the first stage may also partially overlap.

In the first stage, a first electric field is formed between the first pixel electrode 16 and the first common electrode 14 for deflecting the liquid crystal 30 from an initial state to a display state. The liquid crystal 30 is deflected from an initial state to a display state under the control of the first electric field, thereby displaying an image. In the second stage, a second electric field is formed between the second pixel electrode 17 and the first common electrode 14 for turning the liquid crystal 30 to the initial state. The liquid crystal 30 is deflected from the display state to the initial state under the control of the second electric field. In the prior art, the liquid crystal 30 is deflected by the first pixel electrode 16 and the first common electrode 14 for displaying. When the voltage on the first pixel electrode 16 is removed, the liquid crystal 30 will slowly return to the original state due to the intermolecular force. In the present application, by adding the second pixel electrode 17, in the second stage, the second electric field is formed between the second pixel electrode 17 and the first common electrode 14, and the direction of the second electric field intersects with the direction of the first electric field. The accelerated liquid crystal 30 is turned from the display state to the initial state with the aid of the second electric field. As shown in fig. 7, the first electric field has a first component F1 in a plane (or horizontal plane) parallel to the surface of the array substrate 10, and the liquid crystal 30 is rotated from an initial state to a display state in the horizontal plane by the first component F1. And the second electric field also has a second component F2 in a plane (or horizontal plane) parallel to the surface of the array substrate 10, and the liquid crystal 30 is turned back to the initial state in the horizontal plane by the second component F2. More specifically, when the first direction D1 is perpendicular to the second direction D2, components of the first electric field and the second electric field on a plane parallel to the surface of the array substrate 10 are perpendicular to each other.

In conjunction with fig. 7 and 8, it should be noted that fig. 8 shows a change in the state of the liquid crystal on a plane parallel to the array substrate. In the first stage, the first component F1 of the first electric field in the horizontal plane is perpendicular to the extending direction of the first pixel electrode 16 in the first direction D1, i.e., the first component F1 of the first electric field in the horizontal plane is directed to the second direction D2, thereby deflecting the liquid crystal 30 from the initial state to the second direction D2 by an angle of, for example, 15 degrees to 45 degrees, for display. In the second stage, the second component F2 of the second electric field in the horizontal plane is perpendicular to the extending direction of the second pixel electrode 17 in the second direction D2, i.e., the second component F2 of the second electric field in the horizontal plane is directed to the first direction D1, thereby turning the liquid crystal 30 back to the first direction D1 until returning to the initial state. When the first direction D1 is perpendicular to the second direction D2, the second component F2 of the second electric field pointing to the first direction D1 is strongest, enabling the liquid crystal 30 to be turned to the initial state fastest.

It is to be understood that the initial state and the display state of the liquid crystal 30 are related to the properties of the liquid crystal, the alignment direction, and the like, and the above description is only an example, and the present application is not limited to the above embodiments.

The magnitude of the electric field force experienced by the liquid crystal 30 is inversely related to the distance between the liquid crystal 30 and the electrodes. That is, the farther the liquid crystal 30 is from the first pixel electrode 16, the smaller the force of the first electric field applied to the liquid crystal 30, and the longer the time taken to deflect the liquid crystal from the initial state to the display state. In the present embodiment, the first pixel electrode 16 for controlling the display of the liquid crystal 30 is provided on the side of the second pixel electrode 17 for assisting the rotation of the liquid crystal 30, which is closer to the liquid crystal 30, so that the deflection time of the liquid crystal 30 can be shortened and the response speed of the liquid crystal 30 can be increased.

In addition, the second pixel electrode 17 can also be used to form an electric field with the first pixel electrode 16 in the first stage, and the electric field is overlapped with the first electric field, so that the driving voltage required by the first pixel electrode 16 can be reduced, the energy consumption is reduced, the liquid crystal deflection is assisted, and the response speed is improved.

As shown in fig. 2, the color filter substrate 20 includes a second substrate 21, a light shielding portion 22, a color filter 23, and a second common electrode 24.

The second substrate 21 is disposed opposite to the first substrate 11. The second substrate 21 may be a rigid substrate such as a glass substrate or a plastic substrate, or may be a flexible substrate. The material of the flexible substrate may be selected from one or more of polyimide, polyethylene naphthalate, polyethylene terephthalate, polyarylate, polycarbonate, polyetherimide and polyethersulfone.

The light shielding portion 22 and the color filter 23 are provided on the second substrate 21 on the side closer to the first substrate 11. A light shielding portion 22 for shielding light is provided between two adjacent color filters 23.

The second common electrode 24 is disposed on a side of the color filter 23 close to the first substrate 11. The material of the second common electrode 24 may be a transparent metal oxide material. The transparent metal oxide material may be exemplified by: indium Tin Oxide (ITO), Indium Zinc Oxide (IZO), and the like.

Referring to fig. 9, the second common electrode 24 includes a first portion 241 and a second portion 242 connected to the first portion 241. A spacing area 16a is arranged between two adjacent first pixel electrodes 16, and the orthographic projection of the first part 241 of the second common electrode 24 on the plane of the first pixel electrodes 16 falls into the spacing area 16 a. The orthographic projection of the second portion 242 on the plane of the first pixel electrode 16 overlaps the first pixel electrode 16. The first portion 241 can form a horizontal electric field with the first pixel electrode 16 to assist liquid crystal deflection.

Referring to fig. 10, the orthogonal projection of the second common electrode 24 on the plane of the first pixel electrode 16 may fall into the spacing region 16 a. The first portion 241 of the second common electrode 24 is used to form a third electric field with the first pixel electrode 16 in the first stage, which third electric field is superimposed with the first electric field between the first pixel electrode 16 and the first common electrode 14. Specifically, the third electric field has a third component F3 in a plane (or horizontal plane) parallel to the surface of the array substrate 10. The third component F3, superimposed on the first component F1, can reduce the driving voltage required to apply the first pixel electrode 16, thereby reducing power consumption, and assist liquid crystal deflection, improving response speed. A vertical electric field affecting the liquid crystal deflection may be generated between the first pixel electrode 16 and a portion of the second common electrode 24 overlapping the first pixel electrode 16 in an orthogonal projection on the plane of the first pixel electrode 16. Therefore, when the orthographic projection of the second common electrode 24 on the plane of the first pixel electrode 16 completely falls into the spacing region 16a, the display effect of the display panel can be improved.

Referring to fig. 3, the second common electrode 24 extends in the first direction D1. By arranging the second common electrode 24 in parallel with the first pixel electrode 16, the uniformity of the electric field between the second common electrode 24 and the first pixel electrode 16 can be improved.

The second common electrodes 24 and the first pixel electrodes 16 are arranged in parallel to each other in the extending direction and alternately in the horizontal direction. When the second common electrode 24 and the first pixel electrode 16 are alternately disposed in the horizontal direction in parallel with each other, the driving voltage of the liquid crystal 30 is preferably reduced.

The liquid crystal 30 may be a liquid crystal commonly used in the art. For example, a negative liquid crystal may be used, and a positive liquid crystal may be used. And will not be described in detail herein.

The liquid crystal display panel 100 further includes a display structure such as an alignment film for aligning the liquid crystal 30. The description thereof is omitted here.

Referring to fig. 11, the second embodiment of the liquid crystal display panel 100 of the present application is different from the first embodiment in that:

the second pixel electrode 17 is located on a side of the first pixel electrode 16 away from the first common electrode 14.

The first pixel electrode 16 is used to display a screen, as in the first embodiment. Specifically, the first pixel electrode 16 is used to form a first electric field between the first stage and the first common electrode 14. The first electric field is used to control the liquid crystal 30 to be deflected from an initial state to a display state, thereby displaying an image. The second pixel electrode 17 is used to assist the liquid crystal 30 to turn around. The second pixel electrode 17 is used to form a second electric field between the second stage and the first common electrode 14. The second electric field assists the liquid crystal 30 in turning from the display state to the initial state. That is, the second pixel electrode 17 for assisting the liquid crystal 30 to rotate is provided on the side of the first pixel electrode 16 for controlling the display of the liquid crystal 30 close to the liquid crystal 30, so that the rotation time of the liquid crystal 30 can be shortened and the response speed of the liquid crystal 30 can be increased.

The application also provides a driving method of the liquid crystal display panel, which is used for the liquid crystal display panel. The first embodiment of the present application differs from the second embodiment only in the relative positional relationship between the first pixel electrode 16 and the second pixel electrode 17, but the driving method of the liquid crystal panel used is the same.

Each display period of the liquid crystal display panel 100 includes a first phase P1 and a second phase P2. The display period may be one frame time. The first phase P1 is a phase of deflecting the liquid crystal from the initial state to the display state to display a screen. The second phase P2 is a phase for returning the liquid crystal from the display state to the initial state, that is, a preparatory phase for switching from the a image to the B image. In one embodiment, the start time of the second phase P2 is the end time of the first phase P1. That is, the second stage P2 is directly connected after the first stage P1. In other embodiments of the present application, the start time of the second phase P2 is not limited to the end time of the first phase P1. As long as the start time of the first phase P1 is before the start time of the second phase P2. For example, the second phase P2 and the first phase P1 may also partially overlap.

Referring to fig. 2, 12 and 13 together, a first embodiment of a method for driving a liquid crystal display panel according to the present application includes:

101: in the first phase P1, a first voltage is applied to the first pixel electrode 16, a first electric field is formed between the first pixel electrode 16 and the first common electrode 14, and the liquid crystal is deflected to display an image.

In step 101, the first voltage applied to the first pixel electrode 16 may be a high potential. Specifically, in order to prevent polarization of the liquid crystal 30 material, an alternating current may be applied to the first pixel electrode 16. Note that the voltage applied to the first pixel electrode 16 in each pixel region differs depending on the image signal to be displayed in each pixel region. The second voltage applied to the first common electrode 14 may be a low potential. More specifically, the low potential may be 0V or a voltage close to 0V. Thereby, a first electric field is generated between the first pixel electrode 16 and the first common electrode 14. Since the first common electrode 14 is a planar electrode, the voltage applied to the first common electrode 14 in each pixel is the same and stable voltage. In the first stage P1, no voltage may be applied to the second pixel electrode 17, or a voltage of 0V or a voltage close to 0V may be applied to the second pixel electrode 17. An electric field is also formed between the first pixel electrode 16 and the second pixel electrode 17 due to the voltage difference. The electric field between the first pixel electrode 16 and the second pixel electrode 17 is superposed with the first electric field between the first pixel electrode 16 and the first common electrode 14, so that the magnitude of the driving voltage required by the first pixel electrode 16 can be reduced, the driving voltage of the liquid crystal display panel 100 is reduced, and the energy consumption is reduced.

102: in the second phase P2, a second voltage is applied to the second pixel electrode 17, and a second electric field is formed between the second pixel electrode 17 and the first common electrode 14.

In step 102, in the second phase P2, the application of the voltage to the first pixel electrode 16 is stopped, so that the electric field between the first pixel electrode 16 and the first and second

common electrodes

14 and 17 disappears. Next, a second voltage is applied to the second pixel electrode 17. The case of the voltage applied to the first common electrode 14 may be the same as the first phase P1. Since the second pixel electrode 17 intersects the first pixel electrode 16, a second electric field is generated between the second pixel electrode 17 and the first common electrode 14. The second electric field intersects the first electric field. Under the action of the second electric field, the liquid crystal 30 is accelerated to rotate to the initial state.

In a specific embodiment, the time t1 when the second voltage is applied to the second pixel electrode 17 is from when the voltage is removed from the first pixel electrode 16 until the liquid crystal 30 turns back to the initial state. The time t1 when the second voltage is applied to the second pixel electrode 17 is shorter than the time t2 when the first voltage is applied to the first pixel electrode 16. Since the liquid crystal 30 is deflected from the initial state to the display state, it is necessary to counter intermolecular forces of the liquid crystal 30. When the first voltage applied to the first pixel electrode 16 is removed, the liquid crystal 30 is turned around by the intermolecular force. With the assistance of the second electric field, the liquid crystal 30 will turn around for a shorter time than the liquid crystal 30 will deflect to the display state. The liquid crystal 30 can be assisted to rotate by applying a voltage for a short time, and the power consumption can be reduced. Further, the time t1 when the third voltage is applied to the second pixel electrode 17 is shorter than the time t3 when the voltage is not applied to the first pixel electrode 16, so that the display of the next frame screen is not affected.

Referring to fig. 2, 14 and 15 together, a second embodiment of a method for driving a liquid crystal display panel according to the present application includes:

101': in the first phase P1, a first voltage is applied to the first pixel electrode 16, a first electric field is formed between the first pixel electrode 16 and the first common electrode 14, and the liquid crystal is deflected to display an image; in the first phase P1, a third voltage is applied to the second common electrode 24, and a third electric field is formed between the first portion 241 of the second common electrode 24 and the first pixel electrode 16 to assist the liquid crystal deflection.

Here, in step 101', the first voltage applied to the first pixel electrode 16 may be a high potential. Specifically, in order to prevent polarization of the liquid crystal 30 material, an alternating current may be applied to the first pixel electrode 16. Note that the voltage applied to the first pixel electrode 16 in each pixel region differs depending on the image signal to be displayed in each pixel region. The second voltage applied to the first common electrode 14 may be a low potential. More specifically, the low potential may be 0V or a voltage close to 0V. Thereby, a first electric field is generated between the first pixel electrode 16 and the first common electrode 14. Since the first common electrode 14 is a planar electrode, the voltage applied to the first common electrode 14 is the same and stable voltage for each pixel. In the first stage P1, no voltage may be applied to the second pixel electrode 17, or a voltage of 0V or a voltage close to 0V may be applied to the second pixel electrode 17. An electric field is also formed between the first pixel electrode 16 and the second pixel electrode 17 due to the voltage difference. The electric field between the first pixel electrode 16 and the second pixel electrode 17 is superposed with the first electric field between the first pixel electrode 16 and the first common electrode 14, so that the magnitude of the driving voltage required by the first pixel electrode 16 can be reduced, the driving voltage of the liquid crystal display panel 100 is reduced, and the energy consumption is reduced.

A voltage of 0V or approximately 0V may be applied to the second common electrode 24, and a third electric field formed between the first pixel electrode 16 and the first portion 241 of the second common electrode 24 is overlapped with the first electric field between the first pixel electrode 16 and the first common electrode 14, so that the magnitude of the driving voltage required by the first pixel electrode 16 can be reduced, thereby reducing the driving voltage of the liquid crystal display panel 100, reducing power consumption, assisting liquid crystal deflection, and improving response speed. Although the second common electrodes 24 are stripe-shaped electrodes, the voltages applied to the second common electrodes 24 may be the same and stable voltages, or different voltages may be applied to the second common electrodes 24 according to the degree of liquid crystal deflection.

102: in the second phase P2, a second voltage is applied to the second pixel electrode 17, and a second electric field is formed between the first pixel electrode 16 and the first common electrode 14.

In step 102, in the second phase P2, the voltage application to the first pixel electrode 16 is stopped, and the electric field between the first pixel electrode 16 and the first common electrode 14, the second pixel electrode 17, and the second common electrode 24 disappears. Next, a third voltage is applied to the second pixel electrode 17. The case of the voltage applied to the first and second

common electrodes

14 and 24 may be the same as the first phase P1. Since the second pixel electrode 17 intersects the first pixel electrode 16, a second electric field is generated between the second pixel electrode 17 and the first common electrode 14. The second electric field intersects the first electric field. Under the action of the second electric field, the liquid crystal 30 is accelerated to rotate to the initial state. It is understood that an electric field can also be generated between the second pixel electrode 17 and the second common electrode 24. The electric field between the second pixel electrode 17 and the second common electrode 24 is superimposed on the second electric field, so that the liquid crystal 30 is accelerated to turn to the initial state.

In a specific embodiment, the time t1 when the second voltage is applied to the second pixel electrode 17 is from when the voltage is removed from the first pixel electrode 16 until the liquid crystal 30 turns back to the initial state. The time t1 when the second voltage is applied to the second pixel electrode 17 is shorter than the time t2 when the first voltage is applied to the first pixel electrode 16. Since the liquid crystal 30 is deflected from the initial state to the display state, it is necessary to counter intermolecular forces of the liquid crystal 30. When the first voltage applied to the first pixel electrode 16 is removed, the liquid crystal 30 is turned around by the intermolecular force. With the aid of the second electric field, the liquid crystal 30 will be turned around for a shorter time than the liquid crystal 30 is deflected to the display state. The liquid crystal 30 can be assisted to rotate by applying a voltage for a short time, and the power consumption can be reduced. Further, the time t1 when the third voltage is applied to the second pixel electrode 17 is shorter than the time t3 when the voltage is not applied to the first pixel electrode 16, so that the display of the next frame screen is not affected.

In the following, computer simulations were performed on the performance of the liquid crystal display panel of the present application and the prior art to further prove the technical effects of the liquid crystal display panel of the present application.

Referring to fig. 16, fig. 16 is a graph showing Transmittance-Voltage (Voltage-Transmittance-current) curves of the prior art and the first embodiment of the lcd panel according to the present application simulated by a computer. In fig. 16, a curve S1 shows a transmittance vs voltage curve of the liquid crystal display panel 100 according to the first embodiment of the present application, and a curve S2 shows a transmittance vs voltage curve of the liquid crystal display panel according to the related art. As shown in fig. 16, the saturation voltage V1 when the transmittance of the liquid crystal display panel 100 according to the first embodiment of the present application reaches the maximum value is 4.8V, and the saturation voltage V2 when the transmittance of the liquid crystal display panel according to the related art reaches the maximum value is 5.8V. The computer simulation result proves that the structure of the liquid crystal display panel can obtain the effect of reducing the saturation voltage, namely, the driving voltage of the liquid crystal display panel is reduced.

Referring to table 1, table 1 shows response times of comparative examples and the first embodiment of the liquid crystal display panel of the present application simulated by a computer. Specifically, the computer simulates the rise time Tr and the fall time Tf of the first embodiment of the liquid crystal display panel of the related art and the present application, and calculates the sum Tr + Tf of the rise time Tr and the fall time Tf from the rise time Tr and the fall time Tf. The liquid crystal display panel of the comparative example has the same structure as the first embodiment of the liquid crystal display panel of the present application except that it does not have the second pixel electrode and the second common electrode.

	Comparative example	First embodiment
			Tr	4.3ms	4.2ms
Tf	3.5ms	3.1ms
			Tr+Tr	7.8ms	7.3ms

From the computer simulation results, the rise time Tr and the fall time Tf of the liquid crystal display panel 100 of the present application are both reduced compared to the prior art, and the total response time is also shorter than that of the prior art liquid crystal display panel.

The liquid crystal display panel is additionally provided with the second pixel electrode, and the extending direction of the first pixel electrode is set to be intersected with the extending direction of the second pixel electrode, so that the two pixel electrodes and the first common electrode can form two electric fields which are intersected in the direction. The two pixel electrodes are driven in a time-sharing mode, so that a first electric field is formed by the first pixel electrode and the first public electrode in a first stage, liquid crystal is deflected to display, a second electric field is formed by the second pixel electrode and the first public electrode in a second stage, liquid crystal is accelerated to rotate to an initial state, the rotation time of the liquid crystal can be shortened, the response speed is improved, and picture blocking or smear is avoided. Further, according to the liquid crystal display panel, the second common electrode is arranged on the color film substrate, and the orthographic projection of the first part of the second common electrode on the plane where the first pixel electrodes are located falls into the interval area of the two adjacent first pixel electrodes. The first part of the second common electrode can form a third electric field with the first pixel electrode in the first phase to assist the liquid crystal deflection.

The foregoing provides a detailed description of embodiments of the present application, and the principles and embodiments of the present application have been described herein using specific examples, which are presented solely to aid in the understanding of the present application. Meanwhile, for those skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.

Claims

1. A liquid crystal display panel, comprising:

a first substrate;

a first common electrode disposed at one side of the first substrate;

2. The liquid crystal display panel according to claim 1, further comprising a second substrate disposed opposite to the first substrate, and a second common electrode disposed on a side of the second substrate close to the first substrate, wherein a spacing region is provided between two adjacent first pixel electrodes, and an orthographic projection of a first portion of the second common electrode on a plane on which the first pixel electrodes are disposed falls in the spacing region.

3. The liquid crystal display panel according to claim 2, wherein an orthogonal projection of the second common electrode on a plane on which the first pixel electrode is located falls within the full gap region.

4. The liquid crystal display panel according to claim 2, wherein the first pixel electrode includes a stripe electrode extending in the first direction, the second pixel electrode includes a stripe electrode extending in the second direction, the second pixel electrode is between the first pixel electrode and the first common electrode, the first pixel electrode is between the second common electrode and the second pixel electrode, and the second common electrode includes a stripe electrode extending in the first direction.

5. The liquid crystal display panel according to claim 1 or 4, wherein the second direction is perpendicular to the first direction.

6. The liquid crystal display panel according to claim 1, wherein an orthogonal projection of a part of the second pixel electrode on a plane on which the first pixel electrode is located overlaps with the first pixel electrode, and an orthogonal projection of another part of the second pixel electrode on a plane on which the first pixel electrode is located falls in a gap region between adjacent two of the first pixel electrodes.

7. The liquid crystal display panel according to claim 1, wherein the first common electrode is a face electrode, the first pixel electrode includes a stripe electrode extending in the first direction, and the second pixel electrode includes a stripe electrode extending in the second direction;

8. The liquid crystal display panel according to claim 1, wherein the liquid crystal display panel includes a plurality of pixel regions, and a start time of applying a voltage to the second pixel electrode is later than a start time of applying a voltage to the first pixel electrode located in the same pixel region.

9. The liquid crystal display panel of claim 2, wherein the liquid crystal display panel comprises an array substrate, a color filter substrate and liquid crystal disposed between the array substrate and the color filter substrate,

10. A driving method of the liquid crystal display panel according to any one of claims 1 to 9, characterized in that: each display period of the liquid crystal display panel comprises a first phase and a second phase, the starting time of the first phase is before the starting time of the second phase, and the driving method of the liquid crystal display panel comprises the following steps:

11. The method of driving a liquid crystal display panel according to claim 10, wherein: the liquid crystal display panel further comprises a second substrate and a second common electrode, the second substrate is arranged opposite to the first substrate, the second common electrode is arranged on one side, close to the first substrate, of the second substrate, a spacing area is arranged between every two adjacent first pixel electrodes, and the orthographic projection of a first part of the second common electrode on the plane where the first pixel electrodes are located falls into the spacing area;

12. The method of driving a liquid crystal display panel according to claim 10, wherein: the starting time of the second stage is the ending time of the first stage.