CN117724271A - Display device, pixel unit and display panel - Google Patents

Abstract

The application provides a display device, a pixel unit and a display panel, wherein the display device comprises a display panel, the display panel comprises a plurality of pixel units, and each pixel unit comprises a common electrode, a pixel electrode, a liquid crystal unit and an auxiliary electrode. Wherein the common electrode is used for receiving a common voltage; the pixel electrode is opposite to the common electrode and is used for receiving corresponding data voltage; the liquid crystal unit is arranged between the common electrode and the pixel electrode; the auxiliary electrode is positioned on one side of the pixel electrode far away from the common electrode and is opposite to the pixel electrode, and the auxiliary electrode is used for receiving corresponding auxiliary voltage so as to form an electric field in cooperation with the common electrode and the pixel electrode, so that liquid crystal molecules in the liquid crystal unit deflect to an angle corresponding to the data voltage. The pixel unit in the display device provided by the application has the advantages that the response speed is high, and a high refresh rate can be realized.

Description

Display device, pixel unit and display panel

Technical Field

The application relates to the technical field of display, in particular to a display device, a pixel unit and a display panel.

Background

The liquid crystal display (Liquid Crystal Display, LCD) has the advantages of power saving, low radiation, small size, light weight, low price, etc., and is widely used in electronic products such as notebook computers and televisions.

With the development of liquid crystal display technology, the quality requirement for the display picture of the display device is also increasing. Since the higher the refresh rate of the liquid crystal display, the more the number of times the image is refreshed, and thus the weaker the flicker phenomenon of the image display, the higher the image quality of the picture, the refresh rate is important for improving the quality of the picture. However, since the liquid crystal molecules in the liquid crystal display need to overcome the adhesion force during the rotation process, when the rotation angle of the liquid crystal molecules is large, for example, from 90 degrees to 0 degrees, a long time delay period is required, which is a main factor for limiting the refresh rate improvement of the liquid crystal display, the conventional liquid crystal display is not suitable for electronic products with high refresh rate and high response speed.

Disclosure of Invention

In view of the above, the main purpose of the present application is to provide a display device, a pixel unit and a display panel, which are aimed at solving the problems of low response speed and inapplicability to electronic products with high refresh rate and high response speed of the existing liquid crystal display.

To achieve the above object, a first aspect of the present application provides a display device including a display panel including a plurality of pixel units, each of the pixel units including a common electrode, a pixel electrode, a liquid crystal cell, and an auxiliary electrode. Wherein the common electrode is used for receiving a common voltage; the pixel electrode is opposite to the common electrode and is used for receiving corresponding data voltage; the liquid crystal unit is arranged between the common electrode and the pixel electrode; the auxiliary electrode is positioned on one side of the pixel electrode far away from the common electrode and is opposite to the pixel electrode, and the auxiliary electrode is used for receiving corresponding auxiliary voltage so as to form an electric field in cooperation with the common electrode and the pixel electrode, so that liquid crystal molecules in the liquid crystal unit deflect to an angle corresponding to the data voltage.

According to the pixel unit in the display device, the auxiliary electrode opposite to the pixel electrode is arranged on one side, far away from the public electrode, of the pixel electrode, the auxiliary electrode is used for receiving the corresponding auxiliary voltage and is matched with the public electrode and the pixel electrode to form an electric field, so that liquid crystal molecules in the liquid crystal unit can be deflected to an angle corresponding to the data voltage more quickly, the response speed of the pixel unit can be improved, and the display device can achieve higher refresh rate.

In some embodiments, the plurality of pixel units are arranged in an array of a plurality of rows and a plurality of columns, and the display panel further includes a plurality of data lines and a light shielding electrode. The data lines extend along the column direction and are arranged at intervals along the row direction, each data line corresponds to a column of pixel units and is used for transmitting corresponding data voltages to the corresponding column of pixel units, and the data lines are positioned on one side, away from the pixel electrodes, of the layer where the auxiliary electrodes are positioned; the shading electrode is positioned between the layer where the pixel electrode is positioned and the layer where the data line is positioned, and the projection of the shading electrode on the layer where the data line is positioned at least partially covers the data line. The shading electrode and the auxiliary electrode are arranged on the same layer at intervals.

In some embodiments, the pixel units of the same polarity receive the same auxiliary voltage.

In some embodiments, the polarity inversion mode of the display panel is a column inversion mode, and the auxiliary electrodes of the pixel units located in the same column are electrically connected to each other to receive the same auxiliary voltage.

In some embodiments, the display panel further includes a first backbone electrode and a second backbone electrode, each extending in a row direction and being located at opposite ends of the display panel in a column direction, respectively; the first trunk electrode is electrically connected with the auxiliary electrodes of the pixel units in the odd columns and is used for transmitting a first auxiliary voltage to the auxiliary electrodes of the pixel units in the odd columns, and the second trunk electrode is electrically connected with the auxiliary electrodes of the pixel units in the even columns and is used for transmitting a second auxiliary voltage to the auxiliary electrodes of the pixel units in the even columns.

In some embodiments, the display device further includes a driving circuit, where the driving circuit is configured to determine a first amplitude of the first auxiliary voltage and a second amplitude of the second auxiliary voltage according to at least a target gray level to be displayed of each pixel unit in a picture to be displayed, and output the first auxiliary voltage with the first amplitude to the first main electrode and the second auxiliary voltage with the second amplitude to the second main electrode when the display panel is driven to display the picture to be displayed.

In some embodiments, the pixel cells with auxiliary electrodes electrically connected to the first main electrode are defined as a first type of pixel cells, and the pixel cells with auxiliary electrodes electrically connected to the second main electrode are defined as a second type of pixel cells; the driving circuit is used for determining a first amplitude value of the first auxiliary voltage according to a gray scale difference value between the current gray scale of each first type pixel unit and the target gray scale to be displayed, outputting the first auxiliary voltage with the first amplitude value to the first trunk electrode when the display panel is driven to display the picture to be displayed, determining a second amplitude value of the second auxiliary voltage according to a gray scale difference value between the current gray scale of each second type pixel unit and the target gray scale to be displayed, and outputting the second auxiliary voltage with the second amplitude value to the second trunk electrode when the display panel is driven to display the picture to be displayed.

In some embodiments, the first magnitude of the first auxiliary voltage is positively correlated with an average value of gray scale differences between the current gray scale of each of the first type pixel cells and the target gray scale to be displayed; the second amplitude of the second auxiliary voltage is positively correlated with the average value of gray scale differences between the current gray scale of each of the second class pixel units and the target gray scale to be displayed.

The second aspect of the present application also provides a pixel unit including a common electrode, a pixel electrode, a liquid crystal cell, and an auxiliary electrode. Wherein the common electrode is used for receiving a common voltage; the pixel electrode is opposite to the common electrode and is used for receiving corresponding data voltage; the liquid crystal unit is arranged between the common electrode and the pixel electrode; the auxiliary electrode is positioned on one side of the pixel electrode far away from the common electrode and is opposite to the pixel electrode, and the auxiliary electrode is used for receiving corresponding auxiliary voltage so as to form an electric field in cooperation with the common electrode and the pixel electrode, so that liquid crystal molecules in the liquid crystal unit deflect to an angle corresponding to the data voltage.

The third aspect of the present application also provides a display panel including a plurality of scan lines, a plurality of data lines, and a plurality of pixel units. Wherein the plurality of scanning lines extend along the row direction and are arranged at intervals along the column direction; the data lines extend along the column direction and are arranged at intervals along the row direction; the pixel units are respectively positioned at a plurality of crossing positions of the scanning lines and the data lines; wherein the pixel unit is the pixel unit of claim 10.

Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application.

Drawings

Fig. 1 is a schematic structural diagram of a pixel unit in a display panel according to the related art;

fig. 2 is a schematic structural diagram of a display device provided in the present application;

FIG. 3 is a schematic cross-sectional view of the display device shown in FIG. 2 along the direction A-A;

FIG. 4 is a schematic view showing the structure of the light shielding electrode and the auxiliary electrode in the display device shown in FIG. 2;

fig. 5 is a waveform diagram of driving signals of the display device shown in fig. 2.

The reference numerals are explained as follows:

display device 1000

Display panel 100, 100'

Driving circuit 200

Display area 101

Non-display area 102

Scan driving circuit 202

Data driving circuit 201

Pixel cell P, P'

First color pixel unit P1

Second color pixel unit P2

Third color pixel unit P3

Data line 11

Scanning line 12

Array substrate 2

Counter substrate 3

Liquid crystal cell 4

Second substrate 30

Common electrode 31

Pixel electrode 23

First branch electrode 2211

Second branch electrode 2221

First main electrode 2212

Second main electrode 2222

Auxiliary electrode 22

First substrate 20

Shading electrode 21

The following detailed description will further illustrate the application in conjunction with the above-described figures.

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without undue burden, are within the scope of the present application.

Furthermore, the terms "first," "second," and the like in the description of the present invention, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

It should be noted that, without conflict, features in embodiments of the present application may be combined with each other.

As shown in fig. 1, the conventional display panel 100 'includes a plurality of pixel units P' arranged in an array of a plurality of rows and a plurality of columns, a plurality of data lines 11, a light shielding electrode 21, and a shielding metal 14.

Wherein each data line 11 corresponds to a column of pixel units P'. Each pixel cell P' comprises a common electrode 31, a pixel electrode 23 and a liquid crystal cell 4 arranged between the common electrode 31 and the pixel electrode 23. The common electrode 31 is configured to receive a common voltage VCOM, and the pixel electrode 23 is configured to receive a data voltage Vdata corresponding to the pixel unit P ', so that an electric field with an electric field strength corresponding to the data voltage Vdata is generated between the pixel electrode 23 and the common electrode 31, and then the liquid crystal molecules in the liquid crystal unit 4 are driven to deflect to an angle corresponding to the data voltage Vdata, so that the pixel unit P' displays a target gray scale corresponding to the data voltage Vdata. The shielding metal 14 is used for performing electric field isolation between the data line 11 and the pixel electrode 23, so that an electric field generated by the data line 11 can be prevented from acting on the pixel electrode 23, and an electric field generated by the pixel electrode 23 can be prevented from acting on the data line 11. The light shielding electrode 21 is spaced apart from the pixel electrode 23 at the same interval, and in a direction perpendicular to the display panel 100', a projection of the light shielding electrode 21 covers the data line 11 and the shielding metal 14, and the light shielding electrode 21 is used for receiving a shielding voltage to form a shielding electric field in cooperation with the common electrode 31, so that liquid crystal molecules between the light shielding electrode 21 and the common electrode 31 are opaque, thereby performing light shielding on the data line 11 and the shielding metal 14.

The reason why the data voltage Vdata can realize brightness control is that the pixel unit P 'displays different gray scales is that when the voltage value of the data voltage Vdata is different, the electric field intensity generated between the pixel electrode 23 and the common electrode 31 is different, so that the deflection angles of the liquid crystal molecules in the liquid crystal unit 4 are different, and thus the light transmittance is different, and when the deflection angle of the liquid crystal molecules is 90 degrees, the light transmittance is the lowest, and at this time, the brightness of the pixel unit P' is the lowest; when the deflection angle of the liquid crystal molecules is 0 degree, the transmittance of light is the lowest, and the brightness of the pixel unit P' is the highest; when the deflection angle of the liquid crystal molecules is changed between 0 degrees and 90 degrees, the pixel unit P' can display different gray scales. However, the liquid crystal molecules need to overcome the adhesion force during the rotation process, so after the pixel electrode 23 receives the corresponding data voltage Vdata, a certain delay is required to be performed, the liquid crystal molecules can deflect to the target angle corresponding to the data voltage Vdata, and the larger the deflection angle of the liquid crystal molecules is, the longer the delay time is, for example, when the liquid crystal molecules need to deflect from 90 degrees to 0 degrees, the longest the delay time is, which is a main factor for limiting the liquid crystal display to improve the refresh rate, so the existing liquid crystal display is not suitable for electronic products with high refresh rate and high response speed.

In view of this, please refer to fig. 2-3 together, the present application provides a display device 1000, the display device 1000 includes a display panel 100, and the display panel 100 includes a plurality of pixel units P.

Wherein each of the pixel units P includes a common electrode 31, a pixel electrode 23, a liquid crystal cell 4, and an auxiliary electrode 22.

The common electrode 31 is configured to receive a common voltage VCOM.

The pixel electrode 23 is facing the common electrode 31 and is configured to receive a corresponding data voltage Vdata.

The liquid crystal cell 4 is disposed between the common electrode 31 and the pixel electrode 23.

The auxiliary electrode 22 is located at a side of the pixel electrode 23 far from the common electrode 31 and opposite to the pixel electrode 23, and the auxiliary electrode 22 is configured to receive a corresponding auxiliary voltage to form an electric field in cooperation with the common electrode 31 and the pixel electrode 23, so that the liquid crystal molecules in the liquid crystal unit 4 are deflected to an angle corresponding to the data voltage Vdata.

According to the pixel unit P in the display device 1000, the auxiliary electrode 22 opposite to the pixel electrode 23 is arranged on one side, far away from the common electrode 31, of the pixel electrode 23, so that the auxiliary electrode 22 receives corresponding auxiliary voltage and is matched with the common electrode 31 and the pixel electrode 23 to form an electric field, liquid crystal molecules in the liquid crystal unit 4 can deflect to an angle corresponding to the data voltage Vdata more quickly, the response speed of the pixel unit P can be improved, and the display device 1000 can achieve higher refresh rate.

It will be appreciated that when the voltage difference between the auxiliary voltage and the common voltage VCOM is large, the auxiliary electrode 22 and the common electrode 31 may form a strong electric field in the liquid crystal cell 4, and the electric field may generate a strong electric field force on the liquid crystal molecules in the liquid crystal cell 4, so that the liquid crystal molecules may be deflected to an angle corresponding to the data voltage Vdata more quickly against the self adhesive force under the action of the strong electric field force, so that the response speed of the pixel unit P may be improved. For example, assuming that the target gray level of the pixel unit in the current frame is L0 (corresponding to the data voltage of 8V) and the target gray level of the frame to be displayed is L255 (corresponding to the data voltage of 15V), the liquid crystal molecules in the liquid crystal unit 4 need to be deflected from 90 degrees to 0 degrees, and if the existing pixel unit P' is adopted, the liquid crystal molecules need to be deflected from 90 degrees to 0 degrees after a long delay time. In contrast, if the auxiliary electrode 22 receives an auxiliary voltage having a voltage value of 20V to 30V, the auxiliary electrode 22 cooperates with the common electrode 31 and the pixel electrode 23 to form a strong electric field in the liquid crystal cell 4, so that the liquid crystal molecules in the liquid crystal cell 4 can be deflected from 90 degrees to 0 degrees more quickly, and the response speed of the pixel cell P can be greatly improved. The test shows that the response time of the conventional display panel 100' is about 20ms when displaying in a low-temperature environment (-20 ℃ to 0 ℃), and about 12ms when displaying in a normal-temperature environment (0 ℃ to 40 ℃). In contrast, the response time of the display panel 100 provided in the present application is about 12ms when displaying in a low-temperature environment, and about 5ms when displaying in a normal-temperature environment, and the response time is greatly shortened.

In some embodiments, the plurality of pixel units P includes a plurality of first color pixel units P1, a plurality of second color pixel units P2, and a plurality of third color pixel units P3. The color of each column of pixel units is the same, and each row of pixel units is circularly arranged in the sequence of the first color pixel unit P1, the second color pixel unit P2 and the third color pixel unit P3. For example, the first color pixel unit P1, the second color pixel unit P2 and the third color pixel unit P3 may be in one-to-one correspondence with the red color pixel unit, the green color pixel unit and the blue color pixel unit, however, in other embodiments, the first color pixel unit P1, the second color pixel unit P2 and the third color pixel unit P3 may be in other color combinations, for example, the first color pixel unit P1, the second color pixel unit P2 and the third color pixel unit P3 may be in one-to-one correspondence with the red color pixel unit, the yellow color pixel unit and the blue color pixel unit, which is not limited herein.

The display panel 100 has a layered structure, wherein the same structure of each pixel unit P is located on the same layer. Specifically, in a direction perpendicular to the display surface of the display panel 100, the display panel 100 includes an array substrate 2 and a counter substrate 3 that are disposed opposite to each other, the common electrode 31 is disposed on the counter substrate 3, specifically, the counter substrate 3 further includes a second substrate 30, the common electrode 31 is disposed on a side of the second substrate 30 near the array substrate 2, and the common electrodes 31 of all the pixel units P are disposed on the same layer and are connected to each other to form a common electrode layer, so that all the pixel units P receive the same common voltage VCOM. All the liquid crystal cells 4 of the pixel units P are disposed between the array substrate 2 and the counter substrate 3 to constitute a liquid crystal layer. The pixel electrodes 23 and the auxiliary electrodes 22 are disposed on the array substrate 2, and the pixel electrodes 23 of all the pixel units P are disposed on the same layer and are isolated from each other.

The pixel electrode 23 being opposite to the common electrode 31 means that the common electrode 31 and the pixel electrode 23 are spaced apart from each other and projected to substantially coincide in a direction along the layered structure stack in the display panel 100.

The auxiliary electrode 22 and the pixel electrode 23 are opposite to each other, which means that the auxiliary electrode 22 and the pixel electrode 23 are spaced apart from each other and projected to substantially overlap each other in a direction along the lamination stack in the display panel 100.

Further, the plurality of pixel units P are arranged in an array manner with a plurality of rows and a plurality of columns, and the display panel 100 further includes a plurality of data lines 11, a plurality of scan lines 12, and a light shielding electrode 21.

The data lines 11 extend along the column direction and are arranged at intervals along the row direction, each data line 11 corresponds to a column of pixel units P and is used for transmitting a corresponding data voltage Vdata to the corresponding column of pixel units P, and the data lines 11 are located on one side of the layer where the auxiliary electrode 22 is located, which is far away from the pixel electrode 23. The scan lines 12 extend along the row direction and are arranged at intervals along the column direction, and each scan line 12 corresponds to a column of pixel units P and is used for transmitting corresponding scan signals to the corresponding column of pixel units P. The pixel units P are respectively located at a plurality of crossing positions of the scan lines 12 and the data lines 11.

The light shielding electrode 21 is located between the layer where the pixel electrode 23 is located and the layer where the data line 11 is located, and the projection on the layer where the data line 11 is located at least partially covers the data line 11.

The number of the light shielding electrodes 21 is plural, and the light shielding electrodes 21 are in one-to-one correspondence with the data lines 11, preferably, the projection of each light shielding electrode 21 on the layer where the data line 11 is located completely covers the corresponding data line 11. The shielding electrode 21 is configured to receive a shielding voltage to form a shielding electric field in cooperation with the common electrode 31, so that the liquid crystal molecules between the shielding electrode 21 and the common electrode 31 are opaque, thereby shielding the data line 11 and the shielding metal 14.

In this way, since the light shielding electrode 21 is disposed between the layer where the pixel electrode 23 is disposed and the layer where the data line 11 is disposed, the light shielding electrode 21 itself can serve the purpose of performing electric field isolation between the data line 11 and the pixel electrode 23, and therefore, compared with the conventional display panel 100', the shielding metal 14 can be omitted, so that the width of the light shielding electrode 21 can be narrower, and the aperture ratio of the pixel unit P can be improved.

In some embodiments, the light shielding electrode 21 and the auxiliary electrode 22 are disposed at a distance from each other in the same layer. The light shielding electrode 21 and the auxiliary electrode 22 may be formed by a yellow light process.

Specifically, the manufacturing process of the array substrate 2 may include: providing a first substrate 20; forming a second metal layer M2 on a side of the first substrate 20 facing the opposite substrate 3, wherein the second metal layer M2 may include the plurality of data lines 11, sources and drains of thin film transistors (Thin Film Transistor, TFTs); forming a passivation layer PV1 covering at least the second metal layer M2; forming a conductive layer on the passivation layer PV1 by a metal sputtering deposition method, and performing photoresist coating, exposure, development, etching, photoresist stripping, and the like to form the light shielding electrode 21 and the auxiliary electrode 22 having a predetermined pattern; forming an organic planarization layer PFA covering at least the light-shielding electrode 21 and the auxiliary electrode 22; the pixel electrode 23 having a predetermined pattern is formed on the organic planarization layer PFA. The array substrate 2 may further include other layered structures, for example, a first metal layer M1 (not shown) disposed between the first substrate 20 and the second metal layer M2 and the passivation layer PV1, a gate insulating layer Gi/a_si (not shown), an active layer (not shown), and a color filter layer disposed between the passivation layer PV1 and the auxiliary electrode 22, wherein the first metal layer M1 may include a gate electrode and a scan line of a thin film transistor.

Further, the display panel 100 is a liquid crystal display panel (Thin Film Transistor Liquid Crystal Display, TFT-LCD), and is scanned Line by Line in a Line-by-Line manner. Each of the pixel units P includes a thin film transistor (not shown), a liquid crystal capacitor Clc (not shown), and a storage capacitor Cst (not shown). Wherein one end of the storage capacitor Cst and the liquid crystal capacitor Clc is the pixel electrode 23, and the other end is the common electrode 31. The gates of the thin film transistors are connected to the corresponding scan lines 12 to receive the corresponding scan signals. The source of the thin film transistor is connected to the corresponding data line 11 to receive the corresponding data voltage Vdata. The drain electrode of the thin film transistor is connected to the pixel electrode 23. When the scanning signal is at a high level, the thin film transistors of the pixel units P in the corresponding row are turned on, and the data lines 11 can receive the data voltage Vdata to charge the corresponding pixel units P through the turned-on thin film transistors, i.e., write the data voltage Vdata into the pixel electrodes 23.

It will be appreciated that, since the liquid crystal molecules are polarized under the dc voltage driving to cause image retention, in order to avoid permanent damage caused by polarization of the liquid crystal molecules, the polarities of the voltage signals applied to the two ends of the liquid crystal capacitor Clc and the storage capacitor Cst are generally inverted every predetermined time, that is, the polarity inversion driving is performed on the pixel unit P. Among them, common polarity inversion methods include: including but not limited to: frame Inversion (Frame Inversion), column Inversion (column Inversion), dot Inversion (Dot Inversion), row Inversion (Row Inversion). Wherein, before the writing of the previous frame is finished and the writing of the next frame is started, if the polarities of the pixel units P on the whole frame are the same, the polarities of the voltages are all positive or all negative), namely a frame inversion mode is called; if the polarities of the pixel units P on the same column are the same, and the polarities of the pixel units P on the left and right adjacent columns are opposite, the column inversion mode is called; if the polarities of the pixel units P on the same row are the same, and the polarities of the pixel units P on the upper and lower adjacent rows are opposite, the method is called a row inversion method; if the polarity of each pixel unit P is opposite to the polarity of the pixel units P adjacent to each other in the vertical direction, the dot inversion method is called. The pixel cells P having the received data voltage Vdata higher than the common voltage VCOM are defined as positive polarity pixel cells, and the pixel cells having the received data voltage Vdata lower than the common electrode voltage VCOM are defined as negative polarity pixel cells.

In some embodiments, the pixel units P with the same polarity in the plurality of pixel units P receive the same auxiliary voltage, that is, the pixel units with the first polarity in the plurality of pixel units P each receive the first auxiliary voltage, and the pixel units with the second polarity each receive the second auxiliary voltage.

For example, when displaying a frame of picture, the first polarity and the second polarity are positive polarity and negative polarity respectively, the first auxiliary voltage is a positive polarity auxiliary voltage, that is, the voltage value of the first auxiliary voltage is higher than the common voltage VCOM, and the second auxiliary voltage is a negative polarity auxiliary voltage, that is, the voltage value of the second auxiliary voltage is lower than the common voltage VCOM.

Thus, the pixel units P with the same polarity can share an auxiliary voltage, and each pixel unit P does not need to be provided with an auxiliary voltage individually, so that the control circuit can be simplified.

In some embodiments, the polarity inversion of the display panel 100 is a column inversion, and the auxiliary electrodes 22 of the pixel units P in the same column are electrically connected to each other to receive the same auxiliary voltage.

Further, as shown in fig. 4, the display panel 100 further includes a first backbone electrode 2212 and a second backbone electrode 2222, where the first backbone electrode 2212 and the second backbone electrode 2222 each extend along a row direction and are respectively located at opposite ends in a column direction of the display panel 100. The first trunk electrode 2212 is electrically connected to the auxiliary electrodes 22 of the pixel units P in the odd columns, and is used for transmitting a first auxiliary voltage to the auxiliary electrodes 22 of the pixel units P in the odd columns, and the second trunk electrode 2222 is electrically connected to the auxiliary electrodes 22 of the pixel units P in the even columns, and is used for transmitting a second auxiliary voltage to the auxiliary electrodes 22 of the pixel units P in the even columns.

Illustratively, the auxiliary electrodes 22 of each pixel cell P in an odd-numbered column are electrically connected to each other to form a stripe-shaped electrode extending in the column direction, such as the first branch electrode 2211 shown in fig. 4, and the auxiliary electrodes 22 of each pixel cell P in an even-numbered column are electrically connected to each other to form a stripe-shaped electrode extending in the column direction, such as the second branch electrode 2221 shown in fig. 4. The first main electrode 2212 is electrically connected to each of the first branch electrodes 2211, and the second main electrode 2222 is electrically connected to each of the second branch electrodes 2221.

Thus, the pixel units P in the same column share the same branch electrode, so that the area of the electrode is larger, and the manufacturing is easier.

The display panel 100 is divided into a display area 101 and a non-display area 102 surrounding the periphery of the display area 101, the first main electrode 2212 and the second main electrode 2222 are all disposed in the non-display area 102, and the plurality of pixel units P are all disposed in the display area 101.

In some embodiments, the display device 1000 further includes a driving circuit 200, where the driving circuit 200 is configured to determine a first magnitude of the first auxiliary voltage and a second magnitude of the second auxiliary voltage according to at least a target gray level to be displayed in a picture to be displayed of each pixel unit P, and output the first auxiliary voltage having the first magnitude to the first trunk electrode 2212 and the second auxiliary voltage having the second magnitude to the second trunk electrode 2222 when driving the display panel 100 to display the picture to be displayed. The first amplitude of the first auxiliary voltage is an absolute value of a difference between a maximum value of the first auxiliary voltage and an initial value V0. The second amplitude of the second auxiliary voltage is an absolute value of a difference between a maximum value of the second auxiliary voltage and the initial value V0. Wherein the polarities of the first auxiliary voltage and the second auxiliary voltage are opposite. The polarities of the first auxiliary voltage and the second auxiliary voltage are relative to the initial value V0, that is, the voltage value is higher than the initial value V0, the polarity is positive, and the voltage value is lower than the initial value V0, the polarity is negative, wherein the initial value V0 may be the common voltage VCOM.

The driving circuit 200 includes a scan driving circuit 202 and a data driving circuit 201, where the scan driving circuit 202 is electrically connected to the plurality of scan lines 12 and is configured to provide corresponding scan signals to the plurality of scan lines 12. The data driving circuit 201 is electrically connected to the plurality of data lines 11, and is configured to provide the plurality of data lines 11 with corresponding data voltages Vdata.

Referring to fig. 5, in fig. 5, G1 is a waveform of a scan signal output by the first row scan line 12, D1 is a waveform of a data voltage Vdata output by the first column data line 11, RT1_1 is a first waveform of a first auxiliary voltage, RT1_2 is a second waveform of the first auxiliary voltage, RT1_3 is a third waveform of the first auxiliary voltage, wherein a display period of one frame of picture is T0, the first auxiliary voltage is positive, and a first amplitude V1 of the first auxiliary voltage can be determined according to a target gray scale to be displayed of each pixel unit P in the picture to be displayed. The waveform of the first auxiliary voltage may be square wave rt1_1, step wave rt1_2, step wave rt1_3 or other types shown in fig. 5. Specifically, it is found through experiments that when the pixel unit P is a large-sized pixel unit (for example, the size is greater than 150 μm), the display effect is better by providing the square-wave type first auxiliary voltage rt1_1 shown in fig. 5; when the pixel unit P is a small-sized pixel unit (e.g., smaller than 100 μm), the display effect is better by providing the step-shaped first auxiliary voltage rt1_2 shown in fig. 5; when the pixel unit P is a medium-sized pixel unit (for example, the size is 100-150 μm), the first auxiliary voltage rt1_1 is provided in a trapezoid shape as shown in fig. 5, so that the display effect is better.

For convenience of description, the pixel unit P in which the auxiliary electrode 22 is electrically connected to the first backbone electrode 2212 is defined as a first type pixel unit, and the pixel unit P in which the auxiliary electrode 22 is electrically connected to the second backbone electrode 2222 is defined as a second type pixel unit.

In some embodiments, the driving circuit 200 is configured to determine a first magnitude of the first auxiliary voltage according to a gray scale difference between a current gray scale of each of the first type pixel units and a target gray scale to be displayed, and output the first auxiliary voltage having the first magnitude to the first trunk electrode 2212 when the display panel 100 is driven to display a picture to be displayed, and determine a second magnitude of the second auxiliary voltage according to a gray scale difference between a current gray scale of each of the second type pixel units and the target gray scale to be displayed, and output the second auxiliary voltage having the second magnitude to the second trunk electrode 2222 when the display panel 100 is driven to display the picture to be displayed.

Further, the first amplitude of the first auxiliary voltage is positively correlated with an average value of gray scale differences between the current gray scale of each of the first type pixel units and the target gray scale to be displayed. The second amplitude of the second auxiliary voltage is positively correlated with the average value of gray scale differences between the current gray scale of each of the second class pixel units and the target gray scale to be displayed.

When the gray level difference between the current gray level of a first type pixel unit and the target gray level to be displayed is larger, the larger the angle that the liquid crystal molecules in the first type pixel unit need to deflect is, so that a first auxiliary voltage with higher amplitude is provided for the auxiliary electrode 22 of the first type pixel unit, and the liquid crystal molecules in the first type pixel unit can be driven to deflect to the angle corresponding to the target gray level to be displayed more quickly.

Referring to fig. 3 again, based on the same inventive concept, the present application further provides a pixel unit P including a common electrode 31, a pixel electrode 23, a liquid crystal cell 4, and an auxiliary electrode 22.

Wherein the common electrode 31 is configured to receive a common voltage VCOM.

The pixel electrode 23 is facing the common electrode 31 and is configured to receive a corresponding data voltage Vdata.

The liquid crystal cell 4 is disposed between the common electrode 31 and the pixel electrode 23.

The auxiliary electrode 22 is located at a side of the pixel electrode 23 far from the common electrode 31 and opposite to the pixel electrode 23, and the auxiliary electrode 22 is configured to receive a corresponding auxiliary voltage to form an electric field together with the common electrode 31 and the pixel electrode 23, so that the liquid crystal molecules in the liquid crystal unit 4 are deflected to an angle corresponding to the data voltage Vdata.

According to the pixel unit P provided by the application, the auxiliary electrode 22 opposite to the pixel electrode 23 is arranged on one side, far away from the common electrode 31, of the pixel electrode 23, so that the auxiliary electrode 22 receives corresponding auxiliary voltage and is matched with the common electrode 31 and the pixel electrode 23 to form an electric field, and liquid crystal molecules in the liquid crystal unit 4 can be deflected to an angle corresponding to the data voltage Vdata more quickly, and the response speed of the pixel unit P can be improved.

Based on the same inventive concept, the present application also provides a display panel 100, the display panel 100 including a plurality of scan lines 12, a plurality of data lines 11, and a plurality of pixel units P.

The plurality of scan lines 12 extend in the row direction and are arranged at intervals in the column direction.

The plurality of data lines 11 extend along the column direction and are arranged at intervals along the row direction.

The pixel units P are respectively located at a plurality of crossing positions of the scan lines 12 and the data lines 11. The pixel unit P is the pixel unit P described in the above embodiment.

According to the pixel unit P in the display panel 100, the auxiliary electrode 22 opposite to the pixel electrode 23 is arranged on one side, far away from the common electrode 31, of the pixel electrode 23, so that the auxiliary electrode 22 receives corresponding auxiliary voltage and is matched with the common electrode 31 and the pixel electrode 23 to form an electric field, and liquid crystal molecules in the liquid crystal unit 4 can deflect to an angle corresponding to the data voltage Vdata more quickly, and the response speed of the pixel unit P can be improved.

Wherein the pixel unit P and the display panel 100 correspond to the foregoing embodiments of the display device 1000, and a more detailed description can be found in the foregoing embodiments of the display device 1000.

While embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the application, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. A display device comprising a display panel, the display panel comprising a plurality of pixel cells, wherein each of the pixel cells comprises:

a common electrode for receiving a common voltage;

a pixel electrode, positive to the common electrode, for receiving a corresponding data voltage;

a liquid crystal cell disposed between the common electrode and the pixel electrode; and

the auxiliary electrode is positioned on one side, far away from the common electrode, of the pixel electrode and is opposite to the pixel electrode, and the auxiliary electrode is used for receiving corresponding auxiliary voltage so as to form an electric field in cooperation with the common electrode and the pixel electrode, so that liquid crystal molecules in the liquid crystal unit deflect to an angle corresponding to the data voltage.

2. The display device of claim 1, wherein the plurality of pixel cells are arranged in an array of rows and columns, the display panel further comprising:

the data lines extend along the column direction and are arranged at intervals along the row direction, each data line corresponds to a column of pixel units and is used for transmitting corresponding data voltages to the corresponding column of pixel units, and the data lines are positioned on one side, far away from the pixel electrodes, of the layer where the auxiliary electrodes are positioned; and

the shading electrode is positioned between the layer where the pixel electrode is positioned and the layer where the data line is positioned, and the projection of the shading electrode on the layer where the data line is positioned at least partially covers the data line;

the shading electrode and the auxiliary electrode are arranged on the same layer at intervals.

3. The display device of claim 1, wherein the pixel cells of the plurality of pixel cells having the same polarity receive the same auxiliary voltage.

4. A display device as claimed in claim 3, characterized in that the polarity inversion of the display panel is a column inversion, the auxiliary electrodes of the pixel cells in the same column being electrically connected to each other to receive the same auxiliary voltage.

5. The display device according to claim 4, wherein the display panel further comprises a first stem electrode and a second stem electrode, each of the first stem electrode and the second stem electrode extending in a row direction and being located at opposite ends of the display panel in a column direction, respectively; the first trunk electrode is electrically connected with the auxiliary electrodes of the pixel units in the odd columns and is used for transmitting a first auxiliary voltage to the auxiliary electrodes of the pixel units in the odd columns, and the second trunk electrode is electrically connected with the auxiliary electrodes of the pixel units in the even columns and is used for transmitting a second auxiliary voltage to the auxiliary electrodes of the pixel units in the even columns.

6. The display device according to claim 5, further comprising a driving circuit for determining a first magnitude of the first auxiliary voltage and a second magnitude of the second auxiliary voltage according to at least a target gray level to be displayed of each pixel unit in a picture to be displayed, and outputting the first auxiliary voltage having the first magnitude to the first trunk electrode and the second auxiliary voltage having the second magnitude to the second trunk electrode when the display panel is driven to display the picture to be displayed.

7. The display device according to claim 6, wherein a pixel cell in which an auxiliary electrode is electrically connected to the first main electrode is defined as a first type pixel cell, and a pixel cell in which an auxiliary electrode is electrically connected to the second main electrode is defined as a second type pixel cell;

the driving circuit is used for determining a first amplitude value of the first auxiliary voltage according to a gray scale difference value between the current gray scale of each first type pixel unit and the target gray scale to be displayed, outputting the first auxiliary voltage with the first amplitude value to the first trunk electrode when the display panel is driven to display the picture to be displayed, determining a second amplitude value of the second auxiliary voltage according to a gray scale difference value between the current gray scale of each second type pixel unit and the target gray scale to be displayed, and outputting the second auxiliary voltage with the second amplitude value to the second trunk electrode when the display panel is driven to display the picture to be displayed.

8. The display device of claim 7, wherein the first magnitude of the first auxiliary voltage is positively correlated with an average of gray scale differences between a current gray scale of each of the first type of pixel cells and a target gray scale to be displayed;

the second amplitude of the second auxiliary voltage is positively correlated with the average value of gray scale differences between the current gray scale of each of the second class pixel units and the target gray scale to be displayed.

9. A pixel cell, comprising:

a common electrode for receiving a common voltage;

a pixel electrode, positive to the common electrode, for receiving a corresponding data voltage;

a liquid crystal cell disposed between the common electrode and the pixel electrode; and

the auxiliary electrode is positioned on one side of the pixel electrode far away from the common electrode and is opposite to the pixel electrode layer, and the auxiliary electrode is used for receiving corresponding auxiliary voltage so as to form an electric field together with the common electrode and the pixel electrode, so that liquid crystal molecules in the liquid crystal unit deflect to an angle corresponding to the data voltage.

10. A display panel, comprising:

the scanning lines extend along the row direction and are distributed at intervals along the column direction;

the data lines extend along the column direction and are arranged at intervals along the row direction; and

a plurality of pixel units respectively positioned at a plurality of crossing positions of the plurality of scanning lines and the plurality of data lines; wherein the pixel unit is the pixel unit of claim 9.