A display panel, a driving method thereof, and a display device

Abstract

The present invention provides a display panel, a driving method thereof, and a display device. The display panel includes: a substrate and a plurality of pixels arranged in an array on the substrate; each pixel includes: a pixel electrode, the pixel electrode includes a plurality of pixel sub-electrodes independently arranged, the plurality of pixel sub-electrodes include a control electrode and at least two auxiliary electrodes respectively located on both sides of the control electrode; a common electrode located on a side of the pixel electrode away from the substrate; an electrophoretic liquid layer located between the pixel electrode and the common electrode, and the electrophoretic liquid layer includes a plurality of charged particles with opposite electric charges; the auxiliary electrodes located at the same position in each pixel are connected to the same data line of the display panel, and the plurality of pixel sub-electrodes are configured to form a longitudinal electric field perpendicular to the substrate direction and a transverse electric field with an angle greater than 0 degrees between the direction perpendicular to the substrate direction under the control of the applied driving signal.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and in particular to a display panel, a driving method thereof and a display device. Background Art

[0002] Compared with mainstream display technologies such as LCD and OLED, the existing electronic paper display technology has the advantages of low power consumption and strong eye protection, so it is widely used. Its display principle is that the dispersed particles in the dispersant (including positively charged white particles and negatively charged black particles) produce vertical movement under the action of Coulomb force through the vertical electric field provided by the upper and lower electrodes. When the black particles are distributed on the side of the visual field directly above, it is displayed in a black state, and when the white particles are distributed on the side of the upper visual field, it is displayed in a white state. Taking the traditional capsule structure as an example, the grayscale is mainly achieved through the degree of aggregation of black and white particles at the bottom and top of the box. The more black particles on the top, the lower the brightness, and the more white particles on the top, the higher the brightness.

[0003] However, in conventional capsule-type or microcup-type electrophoretic display panels, the charged particles inside have to move a long distance under the action of the vertical electric field, resulting in slow response time and long refresh time. Summary of the invention

[0004] The present invention provides a display panel, a driving method thereof and a display device, which are used to improve picture uniformity while taking into account a narrow frame design.

[0005] In a first aspect, an embodiment of the present invention provides a display panel, including:

[0006] A substrate and a plurality of pixels arrayed on the substrate; wherein each pixel comprises:

[0007] A pixel electrode, wherein the pixel electrode comprises a plurality of pixel sub-electrodes independently arranged from each other, wherein the plurality of pixel sub-electrodes comprises a control electrode and at least two auxiliary electrodes respectively located on both sides of the control electrode;

[0008] A common electrode, located at a side of the pixel electrode away from the base substrate;

[0009] an electrophoretic liquid layer, located between the pixel electrode and the common electrode, and comprising a plurality of charged particles with opposite electrical properties;

[0010] Among them, the auxiliary electrodes located at the same position in each pixel are connected to the same data line of the display panel, and the multiple pixel sub-electrodes are used to form a longitudinal electric field perpendicular to the direction of the substrate and a transverse electric field with an angle greater than 0 degree with the direction perpendicular to the substrate under the control of the loaded driving signal.

[0011] In a possible implementation, the widths of the auxiliary electrodes corresponding to each pixel are equal, and the width of the control electrode is greater than the widths of the auxiliary electrodes.

[0012] In a possible implementation, the auxiliary electrodes at the same position in each pixel are directly connected to the same data line of the display panel. In a possible implementation, each pixel further includes a first control switch coupled to the control electrode, and the first control switch is located between the control electrode and the substrate, and the first control switch is configured to control the driving signal of the picture to be displayed in the corresponding pixel to be written into the control electrode.

[0013] In a possible implementation, each pixel further includes a second control switch coupled to each auxiliary electrode, and the second control switch is located between the corresponding auxiliary electrode and the substrate. The first pole of the second control switch is connected to the data line of the display panel, and the second pole is connected to the corresponding auxiliary electrode, and is configured to connect the auxiliary electrodes at the same position to the same data line of the display panel under the control of the gate.

[0014] In a possible implementation, each pixel further includes a reflective layer located between the substrate and the pixel electrode.

[0015] In a second aspect, an embodiment of the present invention further provides a driving method for a display panel as described in any one of the above, and each pixel includes a data writing stage, including:

[0016] In the data writing stage, the same voltage is applied to the auxiliary electrodes at the same position in each pixel, and a voltage with an absolute value greater than the absolute value of the voltage applied to the corresponding auxiliary electrodes is applied to the control electrode corresponding to each pixel, wherein the voltages applied to each pixel sub-electrode in each pixel change in a gradient manner;

[0017] A longitudinal electric field perpendicular to the substrate direction and a transverse electric field with an angle greater than 0 degrees with respect to the direction perpendicular to the substrate direction are formed.

[0018] In a possible implementation, each pixel further includes an initial stage before the data writing stage, and a particle movement stage and a reset stage sequentially arranged after the data writing stage. The method further includes:

[0019] In the initial stage, an initial pure color picture is displayed;

[0020] In the particle movement stage, the voltage applied to the control electrode in the data writing stage is maintained, and the plurality of charged particles in the electrophoresis liquid layer move under the action of the longitudinal electric field and the transverse electric field.

[0021] In the reset stage, a target screen different from the initial screen is displayed.

[0022] In a possible implementation, if the initial screen is a black screen and the target screen is a white screen, and the plurality of charged particles include positively charged white particles and negatively charged black particles, in the particle movement stage, the driving method further includes:

[0023] Applying a driving signal with a positive voltage to the control electrode, the white particles move in the direction from the pixel electrode to the common electrode under the action of the longitudinal electric field, and the black particles move towards the control electrode under the action of the transverse electric field, so as to adjust the black screen to the white screen.

[0024] In a possible implementation, if the initial screen is a white screen and the target screen is a black screen, and the plurality of charged particles include positively charged white particles and negatively charged black particles, in the particle movement stage, the driving method further includes:

[0025] Applying a driving signal with a negative voltage to the control electrode, the black particles move in the direction from the pixel electrode to the common electrode under the action of the longitudinal electric field, and the white particles move towards the control electrode under the action of the transverse electric field, so as to adjust the white screen to the black screen.

[0026] In a possible implementation, in the data writing stage, the absolute value of the voltage applied to each auxiliary electrode is 0.1 to 0.2 times the absolute value of the voltage applied to the corresponding control electrode.

[0027] In a third aspect, an embodiment of the present invention further provides a display device, including:

[0028] The display panel according to any one of the above.

[0029] The beneficial effects of the present invention are as follows:

[0030] Embodiments of the present invention provide a display panel, a driving method thereof, and a display device. The display panel includes a substrate and a plurality of pixels arranged in an array on the substrate. Each pixel includes a pixel electrode, a common electrode, and an electrophoretic liquid layer. The pixel electrode includes a plurality of pixel sub-electrodes independently arranged, and the plurality of pixel sub-electrodes include a control electrode and at least two auxiliary electrodes respectively located on both sides of the control electrode. The common electrode is located on the side of the pixel electrode away from the substrate. The electrophoretic liquid layer is located between the pixel electrode and the common electrode, and the electrophoretic liquid layer includes a plurality of charged particles with opposite electric charges. Correspondingly, the display panel is actually an electrophoretic display panel. Moreover, the auxiliary electrodes at the same position in each pixel are connected to the same data line of the display panel. Under the control of the applied driving signal, the plurality of pixel sub-electrodes can form a longitudinal electric field perpendicular to the substrate direction and a transverse electric field with an angle greater than 0 degrees with respect to the direction perpendicular to the substrate direction. In this way, the auxiliary electrodes at the same position in each pixel can write the same driving signal through the same data line. On the one hand, it ensures that the aggregation states of the charged particles in the direction parallel to the plane of the substrate are the same under the action of the transverse electric field, thereby improving the surging stability of the charged particles under the action of the transverse electric field and ensuring the uniformity of the picture. On the other hand, it reduces the total number of data lines in the display panel, saves the resources of the driving chip (Integrated Circuit, IC) used to load the driving signal to each pixel through the data line, reduces the number of pins, and also reduces the scale of the fanout area and the IC line in the display panel under the same conditions, which is beneficial to the narrow border design of the display panel.

[0031] Moreover, the charged particles can also move under the action of the longitudinal electric field, so as to realize the adjustment of black state display or white state display. In this way, the charged particles can move under the action of the transverse electric field and the longitudinal electric field generated by each pixel sub-electrode, thereby shortening the migration distance of the charged particles, shortening the response time, and reducing the refresh time. While reducing the refresh time, the uniformity of the picture is improved, and the display effect is ensured. Description of the Drawings

[0032] Figure 1 It is a schematic structural diagram of one of the non-capsule electrophoretic display panels in the related art;

[0033] Figure 2 It is a timing diagram of one of the pixel sub-electrodes corresponding to two adjacent pixels in the electrophoretic display panel in the related art;

[0034] Figure 3 It is Figure 1 A schematic diagram of the simulation result of the corresponding electric field line distribution;

[0035] Figure 4One of the top - view structural diagrams of a display panel provided by an embodiment of the present invention;

[0036] Figure 5 Is along Figure 4 One of the cross - sectional structural diagrams in the direction shown by MM therein;

[0037] Figure 6 Is Figure 5 One of the circuit structural diagrams between pixel sub - electrodes corresponding to two adjacent pixels in the display panel shown;

[0038] Figure 7 Is Figure 5 One of the circuit structural diagrams between pixel sub - electrodes corresponding to two adjacent pixels in the display panel shown;

[0039] Figure 8 Is Figure 5 One of the circuit structural diagrams between pixel sub - electrodes corresponding to two adjacent pixels in the display panel shown;

[0040] Figure 9 One of the partial cross - sectional structural diagrams of a display panel provided by an embodiment of the present invention;

[0041] Figure 10 Is Figure 5 One of the circuit structural diagrams between pixel sub - electrodes corresponding to two adjacent pixels in the display panel shown;

[0042] Figure 11 One of the method flowcharts of a driving method of a display panel provided by an embodiment of the present invention;

[0043] Figure 12 One of the method flowcharts of a driving method of a display panel provided by an embodiment of the present invention;

[0044] Figure 13 One of the timing diagrams of a driving method of a display panel provided by an embodiment of the present invention;

[0045] Figure 14 Is the adjustment process of the display panel based on Figure 13 One of the timing diagrams shown;

[0046] Figure 15 Is the adjustment process of the display panel based on Figure 13 One of the timing diagrams shown.

[0047] Explanation of reference numerals:

[0048] 10 - Substrate; 20 - Pixel; 30 - Pixel electrode; 301 - Pixel sub - electrode; 31 - Control electrode; 32 - Auxiliary electrode; 40 - Common electrode; 50 - Electrophoretic liquid layer; 11 - Another substrate; 60 - First control switch; 70 - Second control switch; 80 - Gate; 81 - Active layer; 82 - Source; 83 - Drain; 84 - Gate insulating layer; 85 - First passivation layer; 86 - Planarization layer; 87 - Light - shielding layer; 88 - Second passivation layer; 89 - Barrier wall; 90 - Reflective layer. Detailed implementation manners

[0049] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. And, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0050] Unless otherwise defined, the technical terms or scientific terms used in the present invention shall have the ordinary meanings understood by those of ordinary skill in the art to which the present invention pertains. The words such as "including" or "comprising" used in the present invention mean that the elements or objects appearing before this word cover the elements or objects listed after this word and their equivalents, without excluding other elements or objects.

[0051] It should be noted that the sizes and shapes of the various figures in the drawings do not reflect the true proportions, and the purpose is only to schematically illustrate the content of the present invention. And the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout.

[0052] In the related art, in traditional capsule - type or micro - cup - type electrophoretic display panels, the driving circuits for driving the bottom electrodes all adopt the method of writing data signals to each pixel corresponding to the bottom electrode one by one. The thin - film transistors (TFTs) are turned on row by row through the scanning control terminal, and signals are written to each bottom electrode sequentially or simultaneously. In this way, sufficient migration distance needs to be reserved for charged particles in the longitudinal direction (perpendicular to the substrate direction), and the distance between the pixel electrode and the common electrode usually needs to be 100 microns, resulting in slow response time and long refresh time.

[0053] Therefore, a non - capsule - type electrophoretic display panel as shown in Figure 1 can be adopted. Figure 1The situation of a pixel is shown. Specifically, an electrophoretic liquid layer is formed on the surface of the backplane by using the droplet or spin coating method, and then the upper substrate is covered with the electrophoretic liquid layer by the vacuum cell assembly method to form an electrophoretic display structure similar to a liquid crystal cell; among them, the electrophoretic liquid layer includes electrophoretic particles with different electricities. For example, the electrophoretic particles include positively charged white particles and negatively charged black particles. By controlling the vertical electric field generated by the electrodes located on both sides of the electrophoretic liquid layer, the aggregation degree of electrophoretic particles with different electricities at the bottom and the top of the cell is adjusted to achieve different gray levels.

[0054] Still in combination with Figure 1 As shown, the common electrode at the top of the cell is a full-surface electrode, and the pixel electrodes at the bottom of the cell include a plurality of pixel sub-electrodes independent of each other. For example, S1’, S2’, S3’ and S4’. Each pixel sub-electrode is loaded with a differential voltage signal, such as △V0’, △V1’, △V2’ and △V3’. There is a voltage difference between them, and a horizontal lateral electric field is generated in sequence. The pixel area of each pixel sub-electrode is the same, and the Data signal is provided by the TFT alone.

[0055] As Figure 2 Shown is one of the timing diagrams of the pixel sub-electrodes corresponding to two adjacent pixels in the electrophoretic display panel. Among them, pixel PX 1 includes five pixel sub-electrodes including S1, S2, S3, S4 and S5, and the potentials loaded on each pixel sub-electrode are △V1, △V2, △V3, △V4 and △V5 respectively; PX 2 includes five pixel sub-electrodes including S1’, S2’, S3’, S4’ and S5’, and the potentials loaded on each pixel sub-electrode are △V1’, △V2’, △V3’, △V4’ and △V5’ respectively; compared with pixel PX 2, there is a difference between △V1 and △V1’, resulting in a difference in the particle aggregation state under the lateral electric field, thus affecting the display brightness uniformity and the picture uniformity. Moreover, it also makes it difficult for the charged particles to return from the aggregated state to the same flat state, thus affecting the display effect of the picture. Figure 1 As shown by the dotted arrow in Figure 3 shows Figure 1 The simulation result schematic diagram of the corresponding electric field line distribution. In this way, the aggregation state of the charged particles can be changed by adjusting the lateral electric field, and then the multi-dimensional adjustment of brightness and gray level can be realized.

[0056] In actual research, the inventor of the present invention found that the voltage distribution of the pixel sub-electrodes affects the lateral electric field. In the traditional driving method, all reach the black state or the white state in the first stage. However, due to the different viscosities and migration speeds of the liquid, not all charged particles can reach the same position under the corresponding driving voltage. Even when the corresponding voltage is applied, some charged particles will settle or float again due to the action of the Coulomb force. The irregular input voltage will cause the particles to have an uncontrollable movement trajectory under the action of the lateral electric field, which in turn affects the Zeta potential, thereby causing agglomeration phenomena, making it difficult for the bottom particles to change from the aggregated state to a uniform distribution again, and seriously affecting the subsequent display effects of the white state or the black state. Among them, the Zeta potential is an important index characterizing the stability of the dispersion system and is a measure of the intensity of mutual repulsion or adsorption between particles. In addition, the gray level of the electrophoresis liquid depends on the distribution of black and white particles, and the distribution of black and white particles depends on the applied voltage. The driving waveform is the voltage time sequence. If directly driving a pixel from one gray level to another gray level, it will lead to errors in the motion state and the accumulation of non-uniform distribution. Correspondingly, the stability of the horizontal movement of the charged particles in the electrophoresis liquid is poor, resulting in poor picture consistency.

[0057] In view of this, the embodiments of the present invention provide a display panel, a driving method thereof, and a display device, which are used to improve the picture uniformity while taking into account the narrow border design.

[0058] Combined with Figures 4 to 6 shown, wherein, Figure 4 is a top view structural schematic diagram of a display panel provided by an embodiment of the present invention. Figure 5 is along Figure 4 in the direction of MM shown in the middle, which is a cross-sectional structural schematic diagram. Figure 6 is Figure 5 in the display panel shown, which is a circuit structural schematic diagram between the pixel sub-electrodes 301 corresponding to two adjacent pixels (for example, pixel 1 and pixel 2). Specifically, the display panel includes:

[0059] a substrate 10 and a plurality of pixels 20 arranged in an array on the substrate 10; among them, each pixel 20 includes:

[0060] a pixel electrode 30, the pixel electrode 30 includes a plurality of pixel sub-electrodes 301 independently arranged, and the plurality of pixel sub-electrodes 301 include a control electrode 31 and at least two auxiliary electrodes 32 respectively located on both sides of the control electrode 31;

[0061] a common electrode 40, located on the side of the pixel electrode 30 away from the substrate 10;

[0062] An electrophoretic liquid layer 50 is located between the pixel electrode 30 and the common electrode 40, and the electrophoretic liquid layer 50 includes a plurality of charged particles with opposite electrical properties;

[0063] Among them, the auxiliary electrodes 32 located at the same position in each pixel 20 are connected to the same data line of the display panel, and the multiple pixel sub-electrodes 301 are used to form a longitudinal electric field perpendicular to the direction of the base substrate 10 and a transverse electric field with an angle greater than 0 degree with the direction perpendicular to the base substrate 10 under the control of the loaded driving signal.

[0064] In the specific implementation process, the display panel includes a base substrate 10 and a plurality of pixels 20 arranged in an array on the base substrate 10, wherein the base substrate 10 may be a rigid substrate or a flexible substrate, which is not limited here. The specific number of the plurality of pixels 20 arranged in an array on the base substrate 10 can be set according to the actual application requirements, which is not limited here. In addition, each pixel 20 includes a pixel electrode 30, a common electrode 40, and an electrophoretic liquid layer 50 located between the pixel electrode 30 and the common electrode 40, wherein the pixel electrode 30 includes a plurality of pixel sub-electrodes 301 independently arranged from each other, and the plurality of pixel sub-electrodes 301 include a control electrode 31 and at least two auxiliary electrodes 32 respectively located on both sides of the control electrode 31. In one of the exemplary embodiments, the plurality of pixel sub-electrodes 301 include a control electrode 31 and two auxiliary electrodes 32. In one of the exemplary embodiments, the plurality of pixel sub-electrodes 301 include a control electrode 31 and three auxiliary electrodes 32. Of course, the specific number of the plurality of pixel sub-electrodes 301 and the at least two auxiliary electrodes 32 can be set according to the actual application requirements, which is not limited here.

[0065] In one of the exemplary embodiments, for the multiple pixel sub-electrodes 301 corresponding to the pixel electrode 30, the control electrode 31 may be located near the middle of the pixel electrode 30. The common electrode 40 may be located on the side of the pixel electrode 30 away from the base substrate 10. In one of the exemplary embodiments, it may be a planar electrode arranged on the entire surface. The material of the common electrode 40 may be indium tin oxide (ITO). The electrophoretic liquid layer 50 may include multiple charged particles with opposite electrical properties. In one of the exemplary embodiments, the multiple charged particles include positively charged white particles and negatively charged black particles. The specific number of white particles and the specific number of black particles can be set according to the actual application needs and are not limited here.

[0066] Moreover, in the specific implementation process, the physical parameters such as the shape and size of the pixel sub-electrodes 301 located at the same position in each pixel 20 are the same. Here, the "shape" can be the projected shape of the corresponding pixel sub-electrode 301 on the substrate 10, and the "size" includes the extension length along the direction parallel to the arrangement direction of the plurality of pixel sub-electrodes 301 and the extension length along the direction intersecting the arrangement direction of the plurality of pixel sub-electrodes 301. The "same" here can be approximately the same or roughly the same, and no specific limitation is made herein.

[0067] In addition, the auxiliary electrodes 32 located at the same position in each pixel 20 are connected to the same data line of the display panel. Correspondingly, the auxiliary electrodes 32 located at the same position in each pixel 20 are loaded with the same voltage through the same data line. On the one hand, it ensures that the aggregation states of the particles in the direction parallel to the plane of the substrate 10 are the same under the action of the transverse electric field, thereby improving the surging stability of the charged particles under the action of the transverse electric field and ensuring the uniformity of the picture. On the other hand, it reduces the total number of data lines in the display panel, can save the IC resources for loading the driving signals to each pixel through the data lines, reduces the number of pins, and also reduces the scale of the Fanout and IC lines in the display panel under the same conditions, which is beneficial to the narrow border design of the display panel.

[0068] Moreover, each pixel sub-electrode 301 corresponding to each pixel 20 can form a longitudinal electric field perpendicular to the substrate 10 and a transverse electric field with an angle greater than 0 degrees with the direction perpendicular to the substrate 10 under the control of the loaded driving signal. In this way, the charged particles can move under the action of the transverse electric field, so as to adjust the aggregation state of the charged particles in the direction parallel to the plane of the substrate 10; the charged particles can also move under the action of the longitudinal electric field to realize the adjustment of black state display or white state display. In this way, the charged particles can move under the action of the transverse electric field and the longitudinal electric field generated by each pixel sub-electrode 301, thereby shortening the migration distance of the charged particles, shortening the response time, reducing the refresh time, and improving the uniformity of the picture while reducing the refresh time, ensuring the display effect.

[0069] In the specific implementation process, the voltages loaded on each pixel sub-electrode 301 in each pixel 20 change in a gradient manner. In one exemplary embodiment, still in combination with Figure 5As shown, the pixel electrode 30 corresponding to the same pixel 20 includes five pixel sub-electrodes 301 including slit1, slit2, slit3, slit4, and slit5. Among them, slit3 is a control electrode, and the voltage applied thereto is +15V. Slit1, slit2, slit4, and slit5 are auxiliary electrodes, and the voltages applied thereto are -1V, -2V, 1V, and 2V in sequence. Of course, the voltages applied to the respective pixel sub-electrodes 301 corresponding to the respective pixels 20 can also be adjusted according to actual application requirements, which are not limited herein.

[0070] Moreover, the absolute value of the voltage applied to each control electrode 31 is greater than the absolute value of the voltage applied to each auxiliary electrode 32. In one exemplary embodiment, the absolute value of the voltage applied to each auxiliary electrode 32 is 0.1 to 0.2 times the absolute value of the voltage applied to the control electrode 31. In this way, under the control of the applied driving signal, the longitudinal electric field perpendicular to the substrate 10 direction formed by the control electrode 31 corresponding to each pixel 20 can effectively drive the movement of charged particles, thereby realizing grayscale adjustment and ensuring the display effect of the display panel. Moreover, under the control of the applied driving signal, each auxiliary electrode 32 corresponding to each pixel 20 can form a transverse electric field with an angle greater than 0 degrees with the direction perpendicular to the substrate 10 direction. In this way, the charged particles can move under the action of the transverse electric field, so that the aggregation state of the charged particles in the plane parallel to the substrate 10 can be adjusted. In this way, the charged particles can move under the action of the transverse electric field and the longitudinal electric field generated by each pixel sub-electrode 301, thereby shortening the migration distance of the charged particles, shortening the response time, reducing the refresh time, and while reducing the refresh time, improving the uniformity of the screen and ensuring the display effect.

[0071] It should be noted that each pixel sub-electrode 301 corresponding to the pixel electrode 30 is repeatedly arranged in the corresponding pixel. Correspondingly, the arrangement rules of the pixel sub-electrodes 301 in any two pixels are the same. In this way, the auxiliary electrodes 32 at the same position in each pixel 20 are loaded with the same voltage, and the voltages loaded on each pixel sub-electrode 301 in each pixel 20 change in a gradient manner. Correspondingly, there is a pressure difference between the pixel sub-electrodes 301, thereby improving the generation rate and uniformity of the lateral electric field. In the specific implementation process, the voltages loaded on each pixel sub-electrode 301 are different, the corresponding pressure differences between them are different, and the corresponding electric field line distributions will also be different. In practical applications, the voltages loaded on each pixel sub-electrode 301 can be adjusted according to actual application needs, so as to adjust the lateral electric field, and then change the aggregation state of particles through the lateral electric field, realizing multi-dimensional adjustment of brightness and gray scale. In addition, by adjusting the distance between each pixel sub-electrode 301 within the same pixel, the control of the frame refresh time and the adjustment of the white state brightness can be realized.

[0072] In the embodiment of the present invention, still in combination with Figure 5 As shown, the display panel further includes another substrate 11 on the side of the common electrode 40 facing away from the substrate 10. In the specific implementation process, the pattern of each pixel sub-electrode 301 corresponding to the pixel electrode 30 can be formed on the substrate 10 to obtain the corresponding first substrate; it can also be that the entire common electrode 40 is formed on another substrate 11 to obtain the corresponding second substrate; the electrophoresis liquid layer 50 can be formed on the surface of the first substrate by using the droplet (Droplet) or spin coating process; then, the first substrate and the second substrate can be boxed by using the vacuum boxing process to form a capacitive display substrate similar to a liquid crystal cell, thereby obtaining the required display panel.

[0073] In the embodiment of the present invention, still in combination with Figure 5As shown, the widths of the respective auxiliary electrodes 32 corresponding to the respective pixels 20 are equal, and the width of the control electrode 31 is greater than the widths of the respective auxiliary electrodes 32. The "equal" mentioned here can be approximately equal or roughly equal. In the specific implementation process, the ratio of the width of each auxiliary electrode 32 to the width of the control electrode 31 is less than or equal to 1:4, and the interval range between two adjacent pixel sub-electrodes 301 is greater than or equal to the process limit and less than or equal to the cell thickness of the display panel. For the specific widths of the control electrode 31 and each auxiliary electrode 32, and the specific values of the interval range between two adjacent pixel sub-electrodes 301, they can be set according to actual application needs and are not limited herein. In one exemplary embodiment, the extension lengths of the respective auxiliary electrodes 32 and the control electrode 31 corresponding to the respective pixels 20 along the first direction are equal, and the extension widths of the respective auxiliary electrodes 32 corresponding to the respective pixels 20 along the second direction intersecting the first direction are equal and less than the extension width of the control electrode 31 along the second direction. In this way, it is ensured that under the control of the applied driving signal, the longitudinal electric field perpendicular to the substrate 10 direction formed by the control electrode 31 corresponding to each pixel 20 can effectively drive the movement of charged particles, thereby realizing gray scale adjustment and ensuring the display effect of the display panel.

[0074] In the embodiment of the present invention, still in combination with Figure 6 As shown, the auxiliary electrodes 32 at the same position in each pixel 20 are directly connected to the same data line.

[0075] In the specific implementation process, taking Figure 5 the five pixel sub-electrodes 301 included in the single pixel shown as an example, Figure 6FIG. 0 shows a schematic diagram of one of the circuit structures between adjacent two pixels (for example, pixel 1 and pixel 2) in a display panel corresponding to pixel sub-electrodes 301. Specifically, the auxiliary electrodes slit1, slit2, slit4, and slit5 corresponding to pixel 1 are directly connected to data signal terminals Data1, Data2, Data4, and Data5 respectively, and the auxiliary electrode slit1' corresponding to pixel 2 is also directly connected to the data signal terminal Data1, the corresponding auxiliary electrode slit2' is also directly connected to the data signal terminal Data2, the corresponding auxiliary electrode slit4' is also directly connected to the data signal terminal Data4, and the corresponding auxiliary electrode slit5' is also directly connected to the data signal terminal Data5. The control electrode slit3 corresponding to pixel 1 is directly connected to the data signal terminal Data3, and the control electrode slit3' corresponding to pixel 2 is directly connected to the data signal terminal Data3'. Since the auxiliary electrodes 32 at the same positions of pixel 1 and pixel 2 are directly connected to the same data line of the display panel, the same driving signal can be written. In this way, on the one hand, under the action of the horizontal electric field between pixel 1 and pixel 2, the same particle aggregation state is ensured. On the other hand, the total number of data lines in the display panel is reduced, which can save the driving chip IC resources for loading driving signals to each pixel through the data lines, reduce the number of pins, and also reduce the scale of Fanout and IC lines in the display panel under the same conditions, which is beneficial to the narrow border design of the display panel.

[0076] In an embodiment of the present invention, each pixel 20 further includes a first control switch 60 coupled to the control electrode 31, and the first control switch 60 is located between the control electrode 31 and the substrate 10. The first control switch 60 is used to control the writing of the driving signal of the picture to be displayed of the corresponding pixel into the control electrode 31.

[0077] In one exemplary embodiment, in combination with Figure 5 and Figure 7 shown, wherein, Figure 7 is Figure 5Schematic diagram of one of the circuit structures between adjacent pixel sub - electrodes 301 corresponding to two adjacent pixels in the shown display panel. Specifically, each pixel 20 further includes a first control switch 60 coupled to the control electrode 31, and the first control switch 60 is located between the control electrode 31 and the substrate 10. In this exemplary embodiment, the first pole of the first control switch 60 is connected to the data line of the display panel, and the second pole is connected to the corresponding control electrode 31. In addition, in this exemplary embodiment, the auxiliary electrodes 32 at the same position in each pixel 20 are directly connected to the same data line. Still taking the pixels pixel 1 and pixel 2 shown in the figure as an example, the auxiliary electrodes slit1 and slit1’ are both directly connected to the data signal terminal Data1; the auxiliary electrodes slit2 and slit2’ are both directly connected to the data signal terminal Data2; the auxiliary electrodes slit4 and slit4’ are both directly connected to the data signal terminal Data4; the auxiliary electrodes slit5 and slit5’ are both directly connected to the data signal terminal Data5. Correspondingly, the auxiliary electrodes 32 at the same position of pixel 1 and pixel 2 are directly connected to the same data line of the display panel, so that the same driving signal can be written. Moreover, the driving signal of the picture to be displayed of the corresponding pixel can be controlled to be written into the control electrode 31 through the first control switch 60, thereby ensuring the display effect of the display panel. In one exemplary embodiment, still in combination with Figure 7 as shown, the first control switch 60 includes only one TFT. In one exemplary example, the first control switch 60 includes multiple TFTs. Of course, the first control switch 60 can be set according to actual application needs, and is not limited here.

[0078] In the embodiment of the present invention, each pixel 20 further includes a second control switch 70 coupled to each auxiliary electrode 32, and the second control switch 70 is located between the corresponding auxiliary electrode 32 and the substrate 10. The first pole of the second control switch 70 is connected to the data line of the display panel, and the second pole is connected to the corresponding auxiliary electrode 32, and is configured to connect the auxiliary electrodes 32 at the same position together with the same data line of the display panel under the control of the gate.

[0079] In one exemplary embodiment, in combination with Figure 5 and Figure 8 as shown, wherein, Figure 8 is Figure 5Schematic diagram of one of the circuit structures between adjacent pixel sub-electrodes 301 corresponding to two pixels in the shown display panel. Specifically, in addition to the first control switch 60 coupled to the control electrode 31, each pixel further includes a second control switch 70 coupled to each auxiliary electrode 32, and the second control switch 70 is located between the auxiliary electrode 32 and the substrate 10. Accordingly, the voltage writing of the auxiliary electrode 32 can be controlled by the second control switch 70. In one exemplary embodiment, still in conjunction with Figure 8 As shown, the second control switch 70 includes only one TFT. The first pole of the second control switch 70 is connected to the data line of the display panel, and the second pole is connected to the corresponding auxiliary electrode 32, and is configured to connect the auxiliary electrode 32 at the same position to the same data line of the display panel under the control of the gate. Still taking the embodiment shown in the figure as an example, the auxiliary electrode slit2 is connected to the corresponding second control switch 70, and the auxiliary electrode slit2' is connected to the corresponding second control switch 70. Under the control of the same scan signal terminal (Gate), the auxiliary electrode slit2 is connected to the auxiliary electrode slit2'. Of course, the second control switch 70 can also be multiple, and can be specifically set according to actual application needs, which is not limited herein. In this way, for the pixels in the same row, the voltage writing of the corresponding pixel sub-electrode 301 can be controlled by the same scan signal terminal (Gate); moreover, signal coupling caused by direct connection of the pixel sub-electrodes 301 at the same position of each pixel can be avoided; and the voltages written to each pixel sub-electrode 301 can also be differentially compensated by the scan control terminal, thereby avoiding the influence of leakage and ensuring the display effect of the display panel. Of course, in addition to setting the first control switch 60 and the second control switch 70 in the manner mentioned above, other methods can also be adopted according to actual application needs, which is not limited herein.

[0080] It should be noted that the first pole and the second pole of each of the above-mentioned control switches can be interchanged according to the corresponding type and the signal of the signal terminal. For example, the first pole can be the source electrode, and correspondingly the second pole can be the drain electrode. Another example is that the first pole can be the drain electrode, and correspondingly the second pole can be the source electrode, which is not limited herein.

[0081] In the embodiment of the present invention, the number, distribution density, aspect ratio and other parameters of the control switches coupled to the pixel sub-electrodes 301 at the same position in each pixel 20 are the same, so as to ensure the display uniformity of the display panel.

[0082] It should be noted that the first control switch 60 and the second control switch 70 in the embodiments of the present invention both include a gate 80, an active layer 81, a source 82, and a drain 83. Taking the example where the auxiliary electrode 32 near the edge in the pixel is coupled to the second control switch 70, the drain 83 of the TFT corresponding to the second control switch 70 is electrically connected to the auxiliary electrode 32. Combining Figure 9 with the partial cross-sectional structure schematic diagram shown, the TFT can be a bottom-gate structure. Correspondingly, the active layer 81 is located between the gate 80, the source 82, and the drain 83. The display panel includes a gate insulating layer 84 located between the active layer 81 and the gate 80, a first passivation layer 85, a planarization layer 86, and a light-shielding layer 87 located between the source 82 and the auxiliary electrode 32, and a second passivation layer 88 located on the side of the auxiliary electrode 32 away from the substrate 10. Among them, the light-shielding layer 87 is located on the surface of the auxiliary electrode 31 close to the substrate 10, and the orthographic projection of the light-shielding layer 87 on the substrate 10 completely falls within the area range of the auxiliary electrode 32 on the substrate 10. The light-shielding layer can be made of an opaque metal material, and can be specifically set according to actual application needs. In this way, the influence of external light on the working performance of the corresponding second control switch 70 is effectively avoided through the light-shielding layer 87, thereby improving the service performance of the display panel. Of course, in addition to the mentioned film layers, other film layers of the display panel can also be set according to actual application needs. For example, as Figure 5 shown, the display panel further includes a partition wall 89 provided between adjacent pixels, which will not be limited here. Still combining Figure 5 with the figure shown, the orthographic projections of the auxiliary electrode 32 at the edge and the partition wall 89 on the substrate 10 intersect, and the auxiliary electrode 32 is partially covered by the partition wall 89, and the orthographic projections of the common electrode 40 and the partition wall 89 on the substrate 10 intersect, and the common electrode 40 is partially covered by the partition wall 88; moreover, for each pixel, the exposed parts of the common electrode 40 and the corresponding auxiliary electrode 32 at the edge are flush with each other, avoiding the influence of the cell thickness.

[0083] In the specific implementation process, the TFT included in the first control switch 60 can be an N-type or a P-type. The TFT included in the second control switch 70 can be an N-type or a P-type. The material of the active layer 81 in the TFTs included in the first control switch 60 and the second control switch 70 can be amorphous silicon (a-Si), or an oxide semiconductor, or polycrystalline silicon. Correspondingly, the a-Si process can be used to fabricate the first control switch 60 and the second control switch 70, or the oxide semiconductor process can be used to fabricate the first control switch 60 and the second control switch 70, or the low-temperature polycrystalline silicon process can be used to fabricate the first control switch 60 and the second control switch 70. The specific implementation process of the fabrication process can refer to the technical implementation in the related art and will not be elaborated here.

[0084] It should be noted that, in addition to the above-mentioned several implementation manners for setting the connection relationship between the respective pixel sub-electrodes 301 corresponding to each pixel 20, it is also possible that the auxiliary electrodes 32 at the same position in each pixel 20 are respectively coupled to different data signal terminals, and each data signal terminal is used to provide the same data signal.

[0085] In the specific implementation process, taking Figure 5 the five pixel sub-electrodes 301 included in the single pixel shown as an example, Figure 10 FIG. shows a schematic diagram of one of the circuit structures between the pixel sub-electrodes 301 corresponding to two adjacent pixels (for example, pixel 1 and pixel 2) in the display panel. Specifically, the auxiliary electrodes slit1, slit2, slit4, and slit5 corresponding to pixel 1 are respectively coupled to the data signal terminals Data1, Data2, Data4, and Data5, and the auxiliary electrodes slit1', slit2', slit4', and slit5' corresponding to pixel 2 are respectively coupled to the data signal terminals Data1', Data2', Data4', and Data5'. Among them, the data signal terminals to which the auxiliary electrodes 32 at the same position are coupled provide the same data signal. Still referring to the foregoing exemplary embodiment, Data1 and Data1' are both loaded with the same data signal. Thereby, the surging stability of the charged particles under the action of the transverse electric field is improved, and the uniformity of the picture is ensured. Moreover, the control electrode slit3 corresponding to pixel 1 is coupled to the data signal terminal Data3, and the control electrode slit3' corresponding to pixel 2 is coupled to the data signal terminal Data3'.

[0086] It should be noted that Figures 6 to 8 and Figure 10 in, the capacitor C represents the capacitor formed between the corresponding pixel sub-electrode 301 and the common electrode 40. In the figure, an example is given in which one pixel electrode 30 includes five pixel sub-electrodes 301. Correspondingly, the capacitances formed between the five pixel sub-electrodes 301 and the common electrode 40 are C1 to C5 in sequence. In one exemplary embodiment, the capacitance value of the capacitor C3 may be 1 PF. Of course, the specific capacitance values of each capacitor can also be set according to actual application needs, which are not limited herein. In this way, the influence of the parasitic capacitance can be eliminated through the capacitor C, and the driving performance of the corresponding circuit is improved.

[0087] In the embodiment of the present invention, still referring to Figure 5As shown, each pixel 20 further includes a reflective layer 90 located between the substrate 10 and the pixel electrode 30. Through this reflective layer 90, the reflectivity of light can be improved, thereby enhancing the display efficiency of the display panel. In the specific implementation process, the larger the area of the reflective layer blocked by the black particles, the lower the light emission brightness of the pixel; conversely, the smaller the area of the reflective layer blocked by the black particles, the higher the light emission brightness of the pixel. In one exemplary embodiment, when the number of white particles is less than the number of black particles, the color of the reflective layer 90 can be set to white, thereby enhancing the reflection of white light by setting the reflective layer 90. In addition, by adjusting the transverse electric field and longitudinal electric field corresponding to each pixel 20, the relevant charged particles can be driven to move, thereby adjusting the aggregation degree of the corresponding charged particles at the top or bottom of the electrophoresis liquid layer 50. In practical applications, the reflectivity can be adjusted by adjusting the area of the region where the black particles cover the reflective layer, which not only increases the gray-scale adjustment dimension but also realizes the adjustment of the brightness of the display panel, ensuring the display effect of the display panel.

[0088] Based on the same inventive concept, an embodiment of the present invention further provides a driving method for the display panel as described above. For the specific structure in the display panel, reference can be made to the description of the relevant parts above, and details will not be elaborated here; each pixel includes a data writing stage, as Figure 11 shown, the driving method includes:

[0089] S101: In the data writing stage, the same voltage is applied to the auxiliary electrodes at the same position in each pixel, and a voltage with an absolute value greater than the absolute value of the voltage applied to the corresponding auxiliary electrode is applied to the control electrode corresponding to each pixel. Among them, the voltages applied to each pixel sub-electrode in each pixel change in a gradient manner;

[0090] S102: A longitudinal electric field perpendicular to the substrate direction and a transverse electric field with an angle greater than 0 degrees with respect to the direction perpendicular to the substrate direction are formed.

[0091] In the embodiment of the present invention, each pixel further includes an initial stage before the data writing stage, and a particle movement stage and a reset stage sequentially arranged after the data writing stage, as Figure 12 shown, the method further includes:

[0092] S201: In the initial stage, an initial pure color screen is displayed;

[0093] S202: In the particle movement stage, the voltage applied to the control electrode in the data writing stage is maintained, and the multiple charged particles in the electrophoresis liquid layer move under the action of the longitudinal electric field and the transverse electric field;

[0094] S203: During the reset stage, display a target solid color screen different from the initial solid color screen.

[0095] Next, take Figure 5 the shown display panel as an example, and combine it with Figure 8 the shown circuit structure and Figure 13 the shown timing diagram. Here, t1 represents the initial stage, t2 represents the data writing stage, t3 represents the particle movement stage, and t4 represents the reset stage. The specific implementation processes of steps S101 to S102 and steps S201 to S203 will be explained accordingly.

[0096] First, in the initial stage t1, display the initial solid color screen. For example, a white screen or a black screen. Correspondingly, load a low-level signal through the scan control terminal Gate, and the corresponding first control switch is turned off, and no driving signal is written to each pixel sub-electrode corresponding to the pixel. Then, in the data writing stage t2, load a high-level signal through the scan control terminal Gate, and the corresponding first control switch is turned on. The IC loads the same voltage to the corresponding auxiliary electrodes through the same data line coupled to the auxiliary electrodes at the same position in each pixel. In this way, not only is it ensured that the charged particles have the same aggregation state in the direction parallel to the plane of the substrate under the action of the horizontal electric field, improving the surging stability of the charged particles under the action of the horizontal electric field and ensuring the uniformity of the screen. In addition, the total number of data lines in the display panel is reduced, saving IC resources and being more conducive to the narrow border design of the display panel.

[0097] In addition, the voltages loaded to each pixel sub-electrode in each pixel can change in a gradient manner. Correspondingly, there is a voltage difference between the pixel sub-electrodes, thus ensuring the generation rate and uniformity of the horizontal electric field. Moreover, under the control of the driving signals loaded to each pixel sub-electrode corresponding to each pixel, a vertical electric field perpendicular to the substrate plane and a horizontal electric field with an angle greater than 0 degrees with respect to the direction perpendicular to the substrate plane are formed.

[0098] Then, in the particle motion stage t3, a low-level signal is loaded through the scan control terminal Gate to control the electrode slit3 to maintain the voltage loaded in the data writing stage under the action of the storage capacitor. Correspondingly, multiple charged particles in the electrophoresis liquid layer move under the action of the longitudinal electric field and the transverse electric field, thereby realizing the adjustment of gray scale and brightness. Then, in the reset stage t4, after the screen state writing is completed, a high-level signal is loaded through the scan control terminal Gate, and the corresponding first control switch is turned on. The IC loads a low-potential signal, such as 0 potential, to each pixel sub-electrode through the corresponding data line, so as to display a target pure-color screen different from the initial pure-color screen. For example, in the initial stage t1, the display panel displays a white screen, and in the reset stage t4, the display panel displays a black screen. Another example is that in the steady state stage t1, the display panel displays a black screen, and in the reset stage t4, the display panel displays a white screen. Among them, "Black" represents the initial black screen, and "White" represents the initial white screen.

[0099] In the embodiment of the present invention, if the initial pure-color screen is a black screen and the target pure-color screen is a white screen, and the multiple charged particles include positively charged white particles and negatively charged black particles, in the particle motion stage t3, the driving method further includes:

[0100] Loading a driving signal with a positive voltage to the control electrode, the white particles move in the direction from the pixel electrode to the common electrode under the action of the longitudinal electric field, and the black particles move towards the control electrode under the action of the transverse electric field to adjust the black screen to the white screen.

[0101] Taking the potential loaded on the common electrode as 0 potential, combined with Figure 13 the shown timing diagram and Figure 14 the shown adjustment process, where the solid arrow direction is the direction of the electric field line. Specifically, the pixel is initially in the black state display. Correspondingly, the black particles are located at the top of the electrophoresis liquid layer, and the white particles are located at the bottom of the electrophoresis liquid layer. In the particle motion stage t3, a positive voltage, such as +15V, is loaded to the control electrode, and the absolute value of the voltage loaded to each auxiliary electrode is 0.1 - 0.2 times the absolute value of the control voltage. In this way, under the action of the longitudinal electric field, the positively charged white particles move towards the top of the electrophoresis liquid layer, and the negatively charged black particles move towards the control electrode under the action of the transverse electric field, so that the pixel can be adjusted from the black screen in the black state display to the white screen in the white state display.

[0102] In the embodiment of the present invention, if the initial pure-color screen is a white screen and the target pure-color screen is a black screen, and the multiple charged particles include positively charged white particles and negatively charged black particles, in the particle motion stage t3, the driving method further includes:

[0103] A driving signal with a negative voltage is applied to the control electrode. Under the action of the longitudinal electric field, the black particles move in the direction from the pixel electrode to the common electrode, and the white particles move towards the control electrode under the action of the transverse electric field, so as to adjust the white picture to the black picture.

[0104] Taking the potential applied to the common electrode as 0 potential, combined with Figure 13 the timing diagram shown in Figure 15 and the adjustment process shown in

[0105]

[0106]

[0107]

[0108] Based on the same inventive concept, an embodiment of the present invention further provides a display device, which is the display panel as described above. The principle of solving problems by this display device is similar to that of the foregoing display panel. Therefore, the implementation of this display device can refer to the implementation of the foregoing display panel, and the repeated parts will not be described again.

[0108] In the specific implementation process, the display device provided by the embodiment of the present invention can be a reflective display device. This display device can be any product or component with a display function, such as a flatbed reader, a display, a digital photo frame, a navigator, etc. Other essential components of this display device are understood by those of ordinary skill in the art and will not be described here, nor should it be regarded as a limitation of the present invention.

[0109] Embodiments of the present invention provide a display panel, a driving method thereof, and a display device. The display panel includes a substrate and a plurality of pixels arranged in an array on the substrate. Each pixel includes a pixel electrode, a common electrode, and an electrophoretic liquid layer. The pixel electrode includes a plurality of pixel sub-electrodes independently arranged, and the plurality of pixel sub-electrodes include a control electrode and at least two auxiliary electrodes located on both sides of the control electrode respectively. The common electrode is located on the side of the pixel electrode away from the substrate. The electrophoretic liquid layer is located between the pixel electrode and the common electrode, and the electrophoretic liquid layer includes a plurality of charged particles with opposite electric charges. Correspondingly, the display panel is actually an electrophoretic display panel. Moreover, the auxiliary electrodes at the same position in each pixel are connected to the same data line of the display panel. Under the control of the applied driving signal, the plurality of pixel sub-electrodes can form a longitudinal electric field perpendicular to the substrate and a transverse electric field with an angle greater than 0 degrees with the direction perpendicular to the substrate.

[0110] The auxiliary electrodes at the same position in each pixel can write the same driving signal through the same data line. On the one hand, it ensures that the aggregation states of the charged particles in the direction parallel to the plane of the substrate are the same under the action of the transverse electric field, thereby improving the surging stability of the charged particles under the action of the transverse electric field and ensuring the uniformity of the picture. On the other hand, it reduces the total number of data lines in the display panel, can save the resources of the driving chip (Integrated Circuit, IC) used to load the driving signal to each pixel through the data line, reduces the number of pins, and also reduces the scale of the fanout area and IC lines in the display panel under the same conditions, which is beneficial to the narrow border design of the display panel.

[0111] Moreover, the charged particles can also move under the action of the longitudinal electric field, so as to realize the adjustment of black state display or white state display. In this way, the charged particles can move under the action of the transverse electric field and longitudinal electric field generated by each pixel sub-electrode, thereby shortening the migration distance of the charged particles, shortening the response time, and reducing the refresh time. While reducing the refresh time, the uniformity of the picture is improved, and the display effect is ensured.

[0112] Although the preferred embodiments of the present invention have been described, those skilled in the art can make additional changes and modifications to these embodiments once they know the basic creative concept. Therefore, the appended claims are intended to be construed to include the preferred embodiments and all changes and modifications falling within the scope of the present invention.

[0113] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application also intends to include these modifications and variations.

Claims

1. A display panel, characterized in that, include: A substrate and a plurality of pixels arrayed on the substrate; wherein each pixel comprises: A pixel electrode, wherein the pixel electrode comprises a plurality of pixel sub-electrodes independently arranged from each other, wherein the plurality of pixel sub-electrodes comprises a control electrode and at least two auxiliary electrodes respectively located on both sides of the control electrode; wherein the control electrode is located in the middle of the pixel electrode; A common electrode, located at a side of the pixel electrode away from the base substrate; an electrophoretic liquid layer, located between the pixel electrode and the common electrode, and comprising a plurality of charged particles with opposite electrical properties; Among them, the auxiliary electrodes located at the same position in each pixel are connected to the same data line of the display panel, and the multiple pixel sub-electrodes are used to form a longitudinal electric field perpendicular to the direction of the substrate and a transverse electric field with an angle greater than 0 degree with the direction perpendicular to the substrate under the control of the loaded driving signal; the voltage loaded on each of the pixel sub-electrodes in each pixel changes in a gradient.

2. The display panel according to claim 1, wherein The widths of the auxiliary electrodes corresponding to the pixels are equal, and the width of the control electrode is greater than the width of the auxiliary electrodes.

3. The display panel according to claim 2, characterized in that, The auxiliary electrodes located at the same position in each pixel are directly connected to the same data line.

4. The display panel according to claim 3, characterized in that, Each pixel also includes a first control switch coupled to the control electrode, and the first control switch is located between the control electrode and the base substrate, and the first control switch is used to control the drive signal of the corresponding pixel to be displayed to be written into the control electrode.

5. The display panel according to claim 4, wherein Each pixel also includes a second control switch coupled to each auxiliary electrode, and the second control switch is located between the corresponding auxiliary electrode and the base substrate, the first pole of the second control switch is connected to the data line of the display panel, and the second pole is connected to the corresponding auxiliary electrode, and is configured so that under the control of the gate, the auxiliary electrodes located at the same position are connected together with the same data line of the display panel.

6. The display panel according to claim 5, wherein Each pixel further includes a reflective layer located between the base substrate and the pixel electrode.

7. A driving method for a display panel according to any one of claims 1-6, characterized in that, Each pixel includes a data writing phase, including: In the data writing stage, the same voltage is applied to the auxiliary electrodes at the same position in each pixel, and a voltage whose absolute value is greater than the absolute value of the voltage applied to each corresponding auxiliary electrode is applied to the control electrode corresponding to each pixel, wherein the voltage applied to each pixel sub-electrode in each pixel changes in a gradient manner; A longitudinal electric field perpendicular to the direction of the substrate and a transverse electric field with an angle greater than 0 degree with the direction perpendicular to the substrate are formed.

8. The driving method according to claim 7, wherein, Each pixel further includes an initial stage before the data writing stage, and a particle movement stage and a reset stage sequentially arranged after the data writing stage. The method further includes: In the initial stage, an initial pure color picture is displayed; In the particle movement phase, the voltage applied to the control electrode in the data writing phase is maintained, and the plurality of charged particles in the electrophoretic liquid layer move under the action of the longitudinal electric field and the transverse electric field; In the reset phase, a target pure color picture different from the initial pure color picture is displayed.

9. The driving method according to claim 8, characterized in that, If the initial pure-color screen is a black screen, the target pure-color screen is a white screen, and the multiple charged particles include positively charged white particles and negatively charged black particles, during the particle movement stage, the driving method further includes: Applying a driving signal with a positive voltage to the control electrode, the white particles move in the direction from the pixel electrode to the common electrode under the action of the longitudinal electric field, and the black particles move towards the control electrode under the action of the transverse electric field, so as to adjust the black screen to the white screen.

10. The driving method according to claim 8, characterized in that, If the initial pure-color screen is a white screen, the target pure-color screen is a black screen, and the multiple charged particles include positively charged white particles and negatively charged black particles, during the particle movement stage, the driving method further includes: Applying a driving signal with a negative voltage to the control electrode, the black particles move in the direction from the pixel electrode to the common electrode under the action of the longitudinal electric field, and the white particles move towards the control electrode under the action of the transverse electric field, so as to adjust the white screen to the black screen.

11. The driving method according to claim 7, characterized in that, During the data writing stage, the absolute value of the voltage applied to each auxiliary electrode is 0.1 to 0.2 times the absolute value of the voltage applied to the corresponding control electrode.

12. A display device, characterized in that, Including: A display panel according to any one of claims 1 to 6.

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