Display panel and driving method for display panel

Abstract

A display panel and a driving method for a display panel, which belong to the technical field of display and aim to improve the display effect. The display panel comprises a plurality of pixel units. Each of the pixel units comprises: a display medium; a common electrode, which is located on a first side of the display medium in the direction of thickness; a plurality of first electrodes, which are arranged at intervals and located on a second side of the display medium in the direction of thickness, wherein the first side is opposite the second side; and a second electrode and / or a third electrode, which are located on the second side. The second electrode is located on the side of the first electrodes facing away from the display medium, and the orthographic projection of the second electrode on the display medium at least overlaps the orthographic projection, on the display medium, of gaps between the plurality of first electrodes; and the third electrode is located at the joint of two adjacent pixel units, and the orthographic projection of the third electrode on the display medium does not overlap the orthographic projection of the first electrodes on the display medium.

Description

Display panel and method for driving the same Technical Field

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

[0002] An electrophoretic display (EPD) is a device that uses electrophoresis to display images. Specifically, an external electric field is applied to dyed charged particles, causing them to move, thereby achieving display. EPDs utilizing electrophoresis offer high display stability. Even without a continuous external electric field, the device can maintain the image display for a considerable period of time.

[0003] Overview

[0004] The present disclosure provides a display panel, comprising a plurality of pixel units, wherein the pixel units include:

[0005] a display medium comprising a plurality of charged particles;

[0006] a common electrode, located on a first side in a thickness direction of the display medium;

[0007] a plurality of first electrodes arranged at intervals, located on a second side in a thickness direction of the display medium, the first side being opposite to the second side; and

[0008] a second electrode and / or a third electrode, located on the second side;

[0009] The second electrode is located on a side of the first electrode facing away from the display medium, and the orthographic projection of the second electrode on the display medium at least covers the orthographic projections of the gaps between multiple first electrodes on the display medium; the third electrode is located at the intersection of two adjacent pixel units, and the orthographic projection of the third electrode on the display medium does not overlap with the orthographic projection of the first electrode on the display medium.

[0010] Exemplarily, the orthographic projection of the second electrode on the display medium entirely covers the orthographic projections of a plurality of the first electrodes on the display medium.

[0011] Exemplarily, the spacing distance between two adjacent first electrodes is smaller than the size of the first electrode in a target direction; wherein the target direction is a direction from one pixel unit to another adjacent pixel unit.

[0012] Exemplarily, a first spacing distance between a plurality of the first electrodes in a pixel unit including the second electrode is greater than a second spacing distance between a plurality of the first electrodes in a pixel unit not including the second electrode.

[0013] Exemplarily, the second electrode and the third electrode are included; wherein the orthographic projection of the second electrode on the display medium does not overlap with the orthographic projection of the third electrode on the display medium.

[0014] Exemplarily, the third electrode is provided in the same layer as the first electrode.

[0015] Exemplarily, the device includes the second electrode and the third electrode, and the third electrode is provided in the same layer as the second electrode.

[0016] Exemplarily, the third electrode is provided in the same layer as the first electrode; wherein the spacing distance between the third electrode and the first electrode located at the edge of the pixel unit is smaller than the spacing distance between the plurality of first electrodes.

[0017] Exemplarily, a retaining wall is provided at the junction between every two adjacent pixel units, and the retaining wall extends in the thickness direction of the display medium;

[0018] The dimension of the first blocking wall in the pixel unit having the third electrode in the thickness direction is smaller than the dimension of the second blocking wall in the pixel unit not having the third electrode in the thickness direction.

[0019] Exemplarily, a dimension of the first retaining wall in the thickness direction of the display medium is smaller than the thickness of the display medium.

[0020] Exemplarily, the orthographic projection of the third electrode on the display medium is covered by the orthographic projection of the first retaining wall on the display medium.

[0021] Exemplarily, the first electrode and the third electrode are arranged in the same layer, and there is a gap between the first retaining wall and the third electrode.

[0022] Exemplarily, the plurality of first electrodes include a plurality of sub-first electrodes arranged along an extension direction of the intersection, and the extension direction is orthogonal to an arrangement direction of two adjacent pixel units;

[0023] The orthographic projection of the third electrode on the target plane in the thickness direction of the display medium covers the orthographic projections of the plurality of sub-first electrodes on the target plane.

[0024] Exemplarily, the display panel further includes a driving module, and the pixel unit includes an edge region and a middle region enclosed by the edge region;

[0025] The plurality of first electrodes on the edge region are connected to the driving module via a same first signal line, and the first electrodes in the middle region are connected to the driving module via a same second signal line.

[0026] A method for driving a display panel is also provided, wherein the method is applied to the display panel, and the method includes:

[0027] In a first stage in which a pixel unit changes from a first display color to a second display color, determining a target direction of an electric field currently existing in the pixel unit based on the first display color;

[0028] Based on the target direction, outputting voltages that change in a time sequence to a plurality of first electrodes in the pixel unit to form an alternating electric field in the target direction; and

[0029] An auxiliary voltage is output to the second electrode and / or the third electrode to assist the alternating electric field and disperse charged particles in the display medium.

[0030] Exemplarily, outputting an auxiliary voltage to the second electrode and / or the third electrode includes:

[0031] Determine a first pixel unit and a second pixel unit that are adjacent and have opposite display color changes, the first pixel unit changes from the first display color to the second display color, and the second pixel unit changes from the second display color to the first display color;

[0032] outputting a first constant voltage to a third electrode located between the first pixel unit and the second pixel unit;

[0033] The first constant voltage is higher than the highest voltage on the first electrode in the first pixel unit, and higher than the highest voltage on the first electrode in the second pixel unit.

[0034] Exemplarily, the target direction in the first pixel unit is a thickness direction of the display medium, and the target direction in the second pixel unit is a direction orthogonal to the thickness direction; and outputting the auxiliary voltage to the second electrode and / or the third electrode includes:

[0035] outputting a voltage with the same timing as that of the first electrode to the second electrode located in the first pixel unit, so as to form an alternating electric field in the thickness direction between the second electrode and the common electrode;

[0036] A constant voltage consistent with the voltage of the common electrode is output to the second electrode located in the second pixel unit.

[0037] Exemplarily, the method further includes:

[0038] In a second stage after the first stage, based on the second display color, outputting first driving voltages corresponding to the plurality of first electrodes;

[0039] and outputting a second driving voltage to the second electrode based on the second display color;

[0040] The second driving voltage is the same as the first driving voltage, or the second driving voltage is the same as the voltage of the common electrode.

[0041] Exemplarily, the outputting the auxiliary voltage to the second electrode and / or the third electrode includes:

[0042] determining a third pixel unit and a fourth pixel unit that have the same color change and are adjacent to each other;

[0043] outputting a third constant voltage to a third electrode located between the third pixel unit and the fourth pixel unit based on the target direction;

[0044] Wherein, the third constant voltage is a preset voltage.

[0045] Exemplarily, the plurality of first electrodes in the pixel unit are divided into a first electrode group, a second electrode group, and a third electrode group, the first electrode group and the second electrode group are located in an edge region of the pixel unit, and the second electrode group is located between the first electrode and the third electrode group; outputting voltages that change in a time sequence to the plurality of first electrodes in the pixel unit based on the target direction includes:

[0046] Determine a plurality of target pixel units having the same color change;

[0047] Based on the target direction, outputting a voltage that changes according to a first time sequence to the second electrode group in each target pixel unit, and outputting a voltage that changes according to a second time sequence to the first electrode group and the third electrode group in each target pixel unit;

[0048] The method further comprises:

[0049] In a second stage after the first stage, based on the second display color, the same third driving voltage is output to the second electrode group in each of the target pixel units, and the same fourth driving voltage is output to the first electrode group and the third electrode group in each of the target pixel units.

[0050] The display panel used in the embodiment of the present disclosure includes multiple pixel units, and the pixel units include a display medium, a common electrode located on a first side in the thickness direction of the display medium, a plurality of first electrodes located on a second side opposite to the first side and arranged at intervals; and a second electrode and / or a third electrode located on the second side; wherein the second electrode is in a different layer from the first electrode, and the orthographic projection of the second electrode on the display medium at least covers the orthographic projection of the gap between the multiple first electrodes on the display medium; the third electrode is located at the intersection of two adjacent pixel units, and the orthographic projection of the third electrode on the display medium does not overlap with the orthographic projection of the first electrode on the display medium.

[0051] In this display panel, an electric field in the thickness direction of the display medium can be formed between the first electrode and the common electrode, and an electric field in the thickness direction of the display medium can also be formed between the second electrode and the common electrode. Since the second electrode at least covers the gap between the first electrodes, it can compensate for the electric field blind area in the thickness direction of the display medium caused by the spacing of the first electrodes. As a result, the electric field strength in the thickness direction of the display medium is more balanced, so that the charged particles can move evenly, thereby improving the uniformity of the display color of the display screen.

[0052] In addition, the third electrode and the first electrode are located on the same side of the display medium. Therefore, a transverse electric field can be formed between the first electrode and the third electrode in the normal direction of the thickness direction of the display medium. This transverse electric field can prevent crosstalk between charged particles in adjacent pixel units, and can further improve the uniformity of the display color of the display screen, thereby improving the display effect.

[0053] An embodiment of the present disclosure further discloses an electronic device, including: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the display panel driving method as described above when executing the computer program.

[0054] An embodiment of the present disclosure further discloses a computer-readable storage medium, which stores a computer program that enables a processor to execute the display panel driving method as described in the present disclosure.

[0055] The above description is only an overview of the technical solution of the present disclosure. In order to more clearly understand the technical means of the present disclosure, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present disclosure more obvious and easy to understand, the specific implementation methods of the present disclosure are listed below.

[0056] BRIEF DESCRIPTION OF THE DRAWINGS

[0057] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or related technologies, the following is a brief introduction to the drawings required for the description of the embodiments or related technologies. Obviously, the drawings described below are some embodiments of the present disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without inventive efforts. It should be noted that the scales in the drawings are for illustration only and do not represent the actual scale.

[0058] FIG1 shows a schematic cross-sectional structure diagram of an electrophoretic display device in the related art;

[0059] 2 to 4 are schematic cross-sectional views of three display panels according to the present embodiment;

[0060] FIG5 is a schematic top plan view of the display panel shown in FIG4 ;

[0061] FIG6 shows a schematic cross-sectional structure diagram of yet another display panel;

[0062] FIG7 is a schematic top plan view of the display panel shown in FIG6 ;

[0063] FIG8 is a schematic diagram showing the distribution of charged particles in the display panel shown in FIG2 under an electric field;

[0064] FIG9 is a schematic diagram showing the distribution of charged particles in the display panel shown in FIG3 under an electric field;

[0065] FIG10 shows a schematic cross-sectional structure diagram of yet another display panel;

[0066] FIG11 shows a schematic top plan view of yet another display panel;

[0067] FIG12 shows a schematic diagram of circuit connections of a display panel in an embodiment of the present disclosure;

[0068] FIG13 is a schematic flow chart showing the steps of a method for driving a display panel in an embodiment of the present disclosure;

[0069] FIG14 shows a schematic cross-sectional structure diagram of three adjacent pixel units;

[0070] FIG15 shows a timing voltage of a control voltage of an electrode in a pixel unit under a scenario;

[0071] FIG16 shows a driving timing diagram of the entire display panel when the display image changes from black to white;

[0072] FIG17 shows another driving timing diagram of the entire display panel when the display image changes from black to white;

[0073] FIG18 shows a driving timing diagram of the entire display panel when the display image changes from white to black;

[0074] FIG19 shows another driving timing diagram of the entire display panel when the display image changes from white to black;

[0075] FIG20 shows a driving timing diagram of two adjacent pixel units changing simultaneously and at the same frequency (displaying the same color change);

[0076] FIG. 21 shows another driving timing diagram in which two adjacent pixel units change simultaneously and at the same frequency.

[0077] Detailed description

[0078] To make the objectives, technical solutions, and advantages of the embodiments of the present disclosure more clear, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present disclosure, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present disclosure without making any creative efforts shall fall within the scope of protection of the present disclosure.

[0079] In some electrophoretic display devices, such as black and white electrophoretic display devices, it is necessary to apply an electric field to the charged particles in the electrophoretic fluid to drive the charged particles to move and thus display the corresponding colors. Generally, electrodes are set on both sides of the electrophoretic fluid. By applying voltage to the electrodes, a corresponding electric field is formed, and the charged particles move under the drive of the electric field.

[0080] 1 , a schematic cross-sectional structure diagram of an electrophoretic display device in related art is shown. As shown in FIG1 , the electrophoretic display device is divided into a plurality of pixel units, each of which includes a common electrode 10 and a split electrode 30 . The split electrode 30 and the common electrode 10 are located on opposite sides of the electrophoretic fluid 20 .

[0081] Taking the charged particles in the electrophoretic fluid as black particles as an example, when different levels are applied to the common electrode and the split electrode, for example, the split electrode voltage = -15V and the common electrode voltage = 0V, a longitudinal electric field will be formed between the common electrode and the split electrode, such as the electric field in the y direction in Figure 1, that is, the electric field in the normal direction of the electrophoretic display device, thereby driving the black charged particles to move longitudinally and spread out in the planar direction of the pixel unit, such as the bottom or top of the pixel unit, and the pixel unit displays black.

[0082] When different voltage levels are applied between multiple segmentation electrodes, for example, the voltage of the segmentation electrode located in the middle of the pixel unit is -15V, and the voltage of the segmentation electrode located at the edge is 0V, a transverse electric field is formed between the segmentation electrodes, such as the electric field in the x-direction in Figure 1, that is, the electric field in the planar direction of the electrophoretic display device, thereby driving the black charged particles to move laterally and thus distribute on the side wall of the pixel unit, that is, on one side of the pixel unit in the x-direction, and the pixel unit displays white.

[0083] Of course, when the pixel unit switches from displaying black to displaying white, the distribution of charged particles needs to be disrupted. At this time, an alternating voltage is applied to the split electrode to form an alternating electric field in the longitudinal direction (y direction), thereby disrupting the distribution of the particles. Then, a transverse electric field is formed through the split electrode to display a white picture.

[0084] When the pixel unit switches from displaying white to displaying black, the distribution of charged particles needs to be disrupted. At this time, alternating voltages with different timings are applied to different segmented electrodes to form an alternating electric field in the horizontal direction (x direction), thereby disrupting the distribution of particles. Then, a longitudinal electric field is formed by the segmented electrodes and the common electrode to display a black screen.

[0085] Although electrophoretic display can be achieved by using segmented electrodes and common electrodes in an electrophoretic display device, in practice, there is still the problem of uneven display color. Taking the charged particles in the electrophoretic fluid as black particles as an example, this unevenness is mainly manifested in the following two aspects:

[0086] First, when a black image is displayed using a vertical electric field, uneven display colors may appear within the pixel unit, such as darker black in some areas and lighter black in others.

[0087] Secondly, due to the limitations of some packaging processes of display devices, pixel units will not be completely isolated, that is, the pixel units will not be completely sealed. In this case, when the display colors of two adjacent pixels change differently, such as one changes from black to white and the other changes from white to black, a transverse electric field will exist between the pixel units. This transverse electric field will cause charged particles to move between adjacent pixel units, resulting in color crosstalk in the adjacent area between the two adjacent pixels, affecting the clarity of the displayed image.

[0088] In view of this, the present disclosure provides a display panel that is dedicated to solving any of the above-mentioned problems to improve the uniformity of the display color of the display panel. Specifically, a second electrode for assisting the longitudinal electric field is added to the pixel unit, and the uniformity of the longitudinal electric field is improved by the second electrode to improve the uniformity of the display color of a single pixel unit; and / or, a third electrode is added to the pixel unit, and a shielding electric field is formed between adjacent pixel units by the third electrode to prevent charged particles from crosstalking and moving between pixel units, so as to avoid color crosstalk in the adjacent area between two adjacent pixels.

[0089] 2 to 5 , FIG. 2 to FIG. 4 respectively show schematic cross-sectional structures of three display panels according to the present embodiment, and FIG. 5 shows a schematic top plan view of the display panel shown in FIG. 4 . As shown in FIG. 2 to FIG. 5 , the display panel of the present disclosure includes a plurality of pixel units 100 , and each pixel unit 100 may specifically include:

[0090] Display medium 11, including a plurality of charged particles;

[0091] The common electrode 12 is located on a first side in the thickness direction of the display medium 11;

[0092] a plurality of first electrodes 13 arranged at intervals, located on the second side in the thickness direction of the display medium 11, the first side being opposite to the second side; and

[0093] The second electrode 14 and / or the third electrode 17 are located on the second side;

[0094] Among them, the second electrode 14 is located on the side of the first electrode 13 facing away from the display medium, and the orthographic projection of the second electrode on the display medium at least covers the orthographic projection of the gaps between multiple first electrodes 13 on the display medium; the third electrode 17 is located at the intersection of two adjacent pixel units, and the orthographic projection of the third electrode 17 on the display medium does not overlap with the orthographic projection of the first electrode 13 on the display medium.

[0095] In this embodiment, as shown in FIG. 2 to FIG. 4 , the display panel may further include:

[0096] A first substrate 15 and a second substrate 16 disposed opposite the first substrate 15 are provided, and the display medium 11 is located between the first substrate 15 and the second substrate 16. The display medium 11 can be divided into a plurality of pixel units 100 by providing a retaining wall 18 on the side of the first substrate 15 or the second substrate 16 close to the display medium 11. The first substrate and the second substrate can both be transparent substrates, such as glass, transparent paper, etc., without particular limitation herein.

[0097] In this embodiment, the display medium can be a liquid medium, such as an electrophoretic fluid. Multiple charged particles, such as nanoparticles, can be distributed within the display medium. It should be noted that the charged particles have a specific color, such as black, white, or red. In this case, the materials of the first and second substrates can be determined based on the color of the charged particles to enable display of an image.

[0098] Among them, the common electrode can be located on the first side in the thickness direction of the display medium, and the thickness direction can refer to the normal direction of the first substrate and the second substrate. Specifically, the common electrode can be located on the side of the second substrate facing away from the display medium, and it can cover the entire surface of the display medium. For example, the common electrode can cover the entire surface of the second substrate. Generally speaking, when driving the display panel for display, the voltage on the common electrode of each pixel unit is consistent, so as to provide the same reference voltage, ensure the accuracy of the driving voltage of the first electrode on each pixel unit, and thus achieve accurate display of the picture.

[0099] In which, the first electrode can be located on the second side in the thickness direction of the display medium, and the second side is opposite to the first side. As shown in Figure 2, the first electrode can be located on the side of the first substrate close to the display medium. Thus, the first electrode and the common electrode are located on opposite sides in the thickness direction of the display medium, so that an electric field in the thickness direction can be generated between the first electrode and the common electrode, so that charged particles can move in the thickness direction.

[0100] The display panel may include the second electrode and / or the third electrode. Specifically, the display panel may include the second electrode, or only include the third electrode, or include both the second electrode and the third electrode.

[0101] In one example, as shown in FIG2 , a display panel is shown that includes a second electrode, and the second electrode is located on the second side of the display medium together with the first electrode, such as the second electrode and the first electrode are both located on the first substrate. In one example, the second electrode can be located on opposite sides of the first substrate, wherein the first electrode is located on the side of the first substrate close to the display medium, and the second electrode is located on the side of the first substrate away from the display medium. For the second electrode, it can at least cover the gaps between the first electrodes, that is, the orthographic projection of the second electrode on the first substrate will cover the gaps between the first electrodes. As shown in FIG2 and FIG5 , the second electrode fully covers multiple first electrodes.

[0102] Of course, in some other examples, referring to FIG6 and FIG7 , FIG6 shows a schematic cross-sectional structure diagram of another display panel, and FIG7 shows a schematic top plan view of the display panel shown in FIG6 , as shown in FIG6 and FIG7 , a plurality of spaced-apart second electrodes are included, and the orthographic projection of each second electrode on the first substrate can cover the orthographic projection of the gap between adjacent first electrodes on the first substrate. Specifically, in further examples, second electrodes can also be distributed between the edge of the pixel unit and the first electrode, so that the second electrode can cover the edge area of ​​the pixel unit, thereby avoiding the electric field blind zone existing in the edge area of ​​the pixel unit.

[0103] When the second electrode is used, since the second electrode at least covers the gap between the first electrodes, when an electric field in the thickness direction of the display medium is formed between the first electrode and the common electrode, the problem of a blind spot in the electric field in the thickness direction caused by the gap between the first electrodes can be compensated. In this way, the electric field in the thickness direction of the gap between the first electrodes can be provided by the second electrode, so that the electric field in the thickness direction within the pixel unit can be more balanced, making the color of the displayed picture more uniform.

[0104] Referring to Figure 8, a schematic diagram of the distribution of charged particles in the display panel shown in Figure 2 under an electric field is shown. When the charged particles are black and the pixel unit displays a black screen, the first electrode and the second electrode simultaneously provide the same voltage, such as providing a -15v voltage and the common electrode providing a 0v voltage. Then, an electric field in the thickness direction is formed between the first electrode and the common electrode, and an electric field in the thickness direction is also formed between the second electrode and the common electrode. When the electric field strength of the two is less than that of the area where the first electrode is located, there is an electric field with the same strength in the gap area of ​​the first electrode, so that there is a uniform electric field in the entire pixel unit. Therefore, compared with Figure 1, the charged particles can be more evenly laid on the plane of the pixel unit, thereby forming a uniform black color.

[0105] In another example, as shown in FIG3 , the display panel includes only a third electrode, and the third electrode is distributed at the intersection between adjacent pixel units and is located on the second side of the display medium together with the first electrode, that is, the first electrode and the third electrode are located on the same side of the display medium, and the orthographic projection of the first electrode on the display medium does not overlap with the orthographic projection of the third electrode on the display medium. For example, the third electrode and the first electrode can be located on the side of the first substrate close to the display medium, with a gap between the first electrode and the third electrode. Thus, by setting the voltage between the first electrode and the third electrode, an electric field in the plane direction of the pixel unit can be formed between the first electrode and the third electrode, thereby forming a shielding electric field between the pixel units, which can confine charged particles to the inside of the pixel unit and prevent charged particles from crosstalking between the pixel units. For example, charged particles in pixel unit A are prevented from crosstalking into pixel unit B, and charged particles in pixel unit B are prevented from crosstalking into pixel unit A.

[0106] 9 , which illustrates the distribution of charged particles in the display panel shown in FIG. 3 under an electric field, shows a schematic diagram of the distribution of charged particles in an electric field. As shown in FIG. 9 , the charged particles are black. Among the adjacent pixel units, one pixel unit 100b needs to switch from a black screen to a white screen, and one pixel unit 100a needs to switch from a white screen to a black screen. FIG. 9 illustrates a schematic diagram of the white screen ultimately displayed by pixel unit 100b and a schematic diagram of the black screen ultimately displayed by pixel unit 100a. In both cases, the charged particles in the pixel units must first be disrupted from their previous state. If the previous screen of pixel unit 100a was white, alternating voltages with different timings are applied between the multiple first electrodes in pixel unit 100a. If the previous screen of pixel unit 100b was black, alternating voltages with the same timing are applied to the multiple first electrodes in pixel unit 100b. During this process, a higher voltage can be applied to the third electrode than to the first electrode, forming an electric field with the third electrode pointing in the direction of the first electrode, thereby forming a shielding electric field between the pixel units and preventing crosstalk between charged particles during screen switching. When the next picture needs to be displayed, an electric field in the thickness direction is formed between the multiple first electrodes and the common electrode in the pixel unit 100a, and a black picture is displayed. An electric field in the plane direction is formed between the multiple first electrodes in the pixel unit 100b, and a white picture is displayed. The result can be shown in Figure 9. The charged particles do not crosstalk between the pixel units, thereby avoiding color interference between the pixel units.

[0107] In another example, as shown in FIG4 , the display panel includes a second electrode and a third electrode, and the settings of the second electrode and the third electrode can refer to the above example. In this example, the second electrode can be used to assist in the uniformity of the electric field in the thickness direction of the display medium to avoid the electric field blind spot existing in the gap between the first electrodes. The third electrode can be used to form a shielding electric field in the planar direction between the pixel units to avoid crosstalk between the charged particles between the pixel units.

[0108] In one example, the second electrode can entirely cover multiple first electrodes in a single pixel unit, but the second electrode in one pixel unit does not overlap with the second electrode in another pixel unit. This simplifies the manufacturing process of the second electrode. Specifically, when the second electrode entirely covers multiple first electrodes in a single pixel unit, for a pixel unit corresponding to 300PPI, where the pixel unit width is 85μm, the size of the second electrode in the target direction can be 60 to 85μm; the target direction is the direction from one pixel unit to another adjacent pixel unit.

[0109] In this example, referring to Figure 2, the orthographic projection of the second electrode on the first substrate may cover the orthographic projections of the multiple first electrodes on the first substrate, and the coverage may include: the orthographic projection of the second electrode on the first substrate coincides with the boundary of the orthographic projections of the multiple first electrodes on the first substrate, and the boundary of the orthographic projection of the second electrode on the first substrate exceeds the boundary with the orthographic projections of the multiple first electrodes on the first substrate, and the exceeding part may be less than 1μm.

[0110] The size of the second electrode in the arrangement direction of adjacent pixel units is 60 to 85 μm, specifically 60 μm, 70 μm, or 85 μm. There is a gap between the second electrode in one pixel unit and the second electrode in another pixel unit in adjacent pixel units, and the gap can be greater than 0 μm and less than 25 μm.

[0111] By adopting this example, the second electrode can fully cover the electric field blind area between the first electrodes as much as possible and cover the electric field blind area on the boundary of the pixel unit, thereby minimizing the black state reflectivity and improving the display color uniformity.

[0112] Specifically, for a pixel unit corresponding to 300PPI, the width of the pixel unit is 85μm, and the size of the multiple first electrodes in the target direction can be 3 to 20μm; wherein the target direction is the direction from one pixel unit to another adjacent pixel unit, that is, the arrangement direction of adjacent pixel units.

[0113] Continuing with FIG. 5 , the target direction may be the x-direction shown in FIG. The size of the first electrode in the target direction may be understood as the electrode width of the first electrode. A wider electrode width results in a wider planar coverage of the electric field between the first electrode and the common electrode, thereby reducing the area where the electric field blind spot exists. Specifically, the size of the first electrode in the target direction may be 3 μm, 4 μm, 5 μm, or 6 μm, with a maximum size of 20 μm.

[0114] Specifically, when the electrode width of the first electrode is smaller, the number of first electrodes distributed in the pixel unit can be greater, while the spacing between the first electrodes can remain consistent regardless of the electrode width. For example, the spacing between the first number of first electrodes can be consistent with the spacing between the second number of first electrodes.

[0115] Of course, in one example, the smaller the electrode width of the first electrode, the smaller the spacing between the first electrodes can be. For example, the electrode width of the first electrode in a first pixel unit is greater than the electrode width of the first electrode in a second pixel unit, and the spacing between the first electrodes in the first pixel unit is greater than the spacing between the first electrodes in the second pixel unit. In this example, the second electrode can be absent or present.

[0116] Specifically, when the electrode width of the first electrodes is wide enough and the gaps between the first electrodes are small enough, the second electrodes may not be provided, and the blind area of ​​the electric field in the thickness direction of the display medium can also be appropriately improved.

[0117] In one example, to ensure the uniformity of the electric field in the thickness direction of the display medium within the pixel unit, the spacing between the first electrodes can be reduced, thereby reducing the area where the electric field blind zone exists. The spacing between two adjacent first electrodes can be smaller than the size of the first electrode in the target direction, that is, the gap between multiple first electrodes can be smaller than the electrode width of the first electrode. Specifically, the spacing between the first electrodes can be 3μm-6μm. In this case, the gap between the first electrodes is smaller than the electrode width of the first electrode, which can reduce the electric field blind zone area in the thickness direction of the electric field and minimize the electric field non-uniformity within the pixel unit.

[0118] In some examples, the pixel unit may include a second electrode or may not include a second electrode, wherein a first spacing distance exists between multiple first electrodes in the pixel unit with the second electrode, and a second spacing distance exists between multiple first electrodes in the pixel unit without the second electrode; wherein the first spacing distance is smaller than the second spacing distance.

[0119] In this example, the pixel unit including the second electrode is referred to as the first pixel unit, and the pixel unit not including the second electrode is referred to as the second pixel unit. The first spacing distance between the multiple first electrodes in the first pixel unit can be greater than the second spacing distance between the multiple first electrodes in the second pixel unit. This is because the first pixel unit already has the second electrode, which can compensate for the electric field blind zone in the thickness direction, thereby providing an electric field in the thickness direction in the electric field blind zone, and making the electric field strength within the pixel unit more balanced. As a result, the first spacing distance between the multiple first electrodes in the first pixel unit can be larger, thereby facilitating the manufacture of the first electrodes and reducing the difficulty of manufacturing the first electrodes.

[0120] Since the second pixel unit does not include a second electrode, the second spacing distance between the first electrodes needs to be minimized. Therefore, the second spacing distance needs to be as small as possible, thereby reducing the electric field blind area in the thickness direction, thereby minimizing the area size of the electric field blind area and improving the uniformity of the electric field distribution.

[0121] In some examples, to further improve the uniformity of the electric field within the pixel unit, such as improving the uniformity of the electric field along the thickness of the display medium and ensuring uniform distribution of charged particles within the pixel unit, multiple first electrodes can be arranged to have equal dimensions. Specifically, the dimensions of different first electrodes can be the same, and these dimensions can include the dimensions of the first electrodes in a target direction. As described in the above example, the target direction is the direction from one pixel unit to another adjacent pixel unit.

[0122] In this example, the size of the first electrode in the target direction may refer to the electrode width of the first electrode, and the target direction may be the arrangement direction of multiple first electrodes. When the electrode widths of multiple first electrodes are set, the size of each first electrode in the arrangement direction can be ensured to be consistent, thereby ensuring that the electric field strength between each first electrode and the common electrode is consistent, thereby ensuring the uniformity of the electric field inside the pixel unit.

[0123] Of course, in this example, the size of the first electrode may also include a size in a direction orthogonal to the target direction, which may also be understood as the electrode length of the first electrode, wherein the electrode lengths of multiple first electrodes may also be consistent.

[0124] In some other examples, for a pixel unit corresponding to 300PPI, the width of the pixel unit is 85μm, and the number of first electrodes arranged in the target direction in the pixel unit can be at least 3, specifically 3 to 15, and the target direction is the direction in which one pixel unit points to another adjacent pixel unit.

[0125] In this example, the number of first electrodes to be included can be determined based on the resolution of the display panel. When the display resolution is high, generally the number of pixel units is greater and the size of the pixel units is smaller, so a smaller number of first electrodes can be arranged. When the display resolution is low, the number of pixel units is smaller and the size of the pixel units is larger, so a larger number of first electrodes can be arranged.

[0126] In some examples, with continued reference to FIG. 4 , including a second electrode and a third electrode, an orthographic projection of the second electrode on the display medium does not overlap with an orthographic projection of the third electrode on the display medium. For example, an orthographic projection of the second electrode on the first substrate does not overlap with an orthographic projection of the third electrode on the first substrate.

[0127] In this example, the second electrode and the third electrode can be located on the same side of the first substrate, or on opposite sides of the first substrate. Regardless of the structure, there is no overlapping portion between the second electrode and the third electrode. When adopting this design, coupling between the second electrode and the third electrode can be avoided, thereby generating unnecessary coupling electric fields and affecting the migration of charged particles.

[0128] Of course, in some other examples, the second electrode and the third electrode can be distributed on opposite sides of the first substrate, and there can be an overlapping region between the second electrode and the third electrode. Since the third electrode is mainly used to form a shielding electric field in the planar direction with the first electrode, the presence of an overlapping region between the second electrode and the third electrode does not significantly affect the shielding electric field, that is, it does not affect the crosstalk shielding of charged particles. Using this overlapping approach, because the overlap between the second electrode and the third electrode is allowed, the dimensional tolerance of the second electrode and the third electrode can be tolerated, thereby improving the process tolerance of the display panel and improving the product yield.

[0129] In some other examples, for the first electrode and the third electrode, the first electrode can be arranged in the same layer as the third electrode, for example, both are located on the side of the first substrate close to the display medium. This arrangement can form a shielding electric field in a planar direction, such as in the x-direction, inside the display medium, which can increase the strength of the shielding electric field, thereby effectively avoiding crosstalk between charged particles between pixel units. Of course, in this example, a second electrode can also be provided, and there can be no overlap between the second electrode and the third electrode. An electric field can also be formed between the second electrode and the third electrode, which can assist in shielding the electric field, thereby avoiding crosstalk between charged particles between pixel units.

[0130] In combination with the above example, when the first electrode and the third electrode are arranged in the same layer, since the first electrode and the third electrode do not overlap, there is a spacing distance between the first electrode and the third electrode. In practice, as shown in Figure 4, the spacing distance between the first electrode and the third electrode can be smaller than the spacing distance between the first electrodes.

[0131] In this example, the spacing between the third electrode and the second electrode is relatively small, thereby forming a strong shielding electric field in the area immediately adjacent to another pixel unit within the pixel unit, thereby preventing crosstalk between the pixel units by charged particles in the intersecting area of ​​the pixel units. Specifically, the first electrode and the third electrode have a third spacing distance, and the first electrodes have a fourth spacing distance. The difference between the third spacing distance and the fourth spacing distance can be approximately 0.3 μm, such as 0.15 μm to 0.35 μm.

[0132] Furthermore, when the spacing between the first electrode and the third electrode is small, a smaller voltage can be provided to the third electrode, thereby forming a stronger shielding electric field between the first electrode and the third electrode, thereby helping to reduce the power consumption of the display panel.

[0133] In another example of this example, when the first electrode and the third electrode are provided in the same layer, the dimension of the third electrode in the thickness direction of the display medium may be greater than or equal to the dimension of the first electrode in the thickness direction of the display medium.

[0134] Please refer to Figures 3 and 4. The first electrode and the third electrode are arranged in the same layer, such as being located on the side of the first substrate close to the display medium. As shown in Figure 3, the size of the first electrode in the thickness direction of the display medium can be smaller than the size of the third electrode in the thickness direction of the display medium. As a result, the shielding electric field formed between the third electrode and the first electrode has a wider coverage in the thickness direction, and the third electrode can act as a partial barrier wall, preventing crosstalk between charged particles through both the shielding electric field and physical crosstalk prevention through the third electrode.

[0135] Of course, as shown in FIG4 , the dimension of the first electrode in the thickness direction of the display medium can be equal to the dimension of the third electrode in the thickness direction of the display medium, that is, the thickness of the first electrode can be equal to the thickness of the third electrode, and the two are arranged in the same layer, so that the first electrode and the third electrode can be formed at one time in the same process, thereby improving manufacturing efficiency.

[0136] In some other examples, the first electrode and the third electrode can be arranged in different layers. For example, the first electrode is located on the side of the first substrate close to the display medium, and the third electrode is located on the side of the first substrate away from the display medium. This arrangement can still form a shielding electric field in the planar direction between the first electrode and the third electrode. Compared with the first and third electrodes being arranged in the same layer, the different layer arrangements can reduce the difficulty of aligning the first substrate and the second substrate. Because during alignment, if the retaining wall and the third electrode are both located inside the display medium, it is generally necessary to align the third electrode and the retaining wall, which obviously increases the difficulty of alignment. If the third electrode is set outside the display medium, then during alignment, it is sufficient to align the retaining wall with the gap between the first electrodes, which greatly reduces the difficulty of alignment.

[0137] In another example, a second electrode and a third electrode may be included, and the third electrode may be disposed in the same layer as the second electrode. For example, the third electrode and the second electrode may both be located on the side of the first substrate facing away from the display medium. Referring to FIG10 , a cross-sectional structural diagram of another display panel is shown. As shown in FIG10 , the display panel includes both the third electrode and the second electrode, and the third electrode and the second electrode are disposed in the same layer, with a gap between the second and third electrodes, thereby preventing crosstalk between the electrical signals therebetween.

[0138] In the display panel in this example, there can be an electric field in the planar direction between the third electrode and the second electrode. At the same time, there can also be an electric field in the planar direction between the third electrode and the first electrode. The two electric fields can be superimposed, thereby generating a shielding electric field between adjacent pixel units, thereby preventing charged particles from crosstalking between pixel units.

[0139] In this example, the third electrode is arranged outside the display medium, which can reduce the difficulty of box alignment. At the same time, compared with the case without the second electrode, the strength of the shielding electric field can be enhanced, and the crosstalk shielding of charged particles can be enhanced.

[0140] Of course, in some other implementations, there may be multiple third electrodes between adjacent pixel units. The multiple third electrodes may include electrodes arranged in the same layer as the first electrode, and electrodes arranged in the same layer as the second electrode. For example, third electrodes may be arranged on opposite sides of the first substrate, and a second electrode may be arranged on the side of the first substrate facing away from the display medium. Thus, through the third electrode, the first electrode and the second electrode, a shielding electric field is formed both inside and outside the display medium, thereby enhancing the electric field force that confines the charged particles inside the pixel unit, thereby ensuring that the charged particles only move inside the pixel unit without crosstalking with other pixel units.

[0141] As shown in Figures 2-4 and 10, in some examples, a retaining wall is set between two adjacent pixel units. For example, the retaining wall is located at the intersection between adjacent pixel units, and the retaining wall can extend in the thickness direction of the display medium to divide the display medium into multiple pixel units.

[0142] Specifically, in one example, the thickness dimension of the first retaining wall in the pixel unit having the third electrode is smaller than the thickness dimension of the second retaining wall in the pixel unit not having the third electrode. In this example, the retaining wall can be formed on the side of the second substrate closest to the display medium, and the orthographic projection of the retaining wall on the first substrate does not overlap with the orthographic projection of the first electrode on the first substrate.

[0143] Specifically, for the second retaining wall in a pixel unit that does not include a third electrode, and for the first retaining wall in a pixel unit that includes a third electrode, the size of the second retaining wall in the thickness direction of the display medium can be larger than the size of the first retaining wall in the thickness direction of the display medium. For example, the size of the second retaining wall in the thickness direction can be slightly larger than the thickness of the display medium, while the size of the first retaining wall in the thickness direction can be smaller than the thickness of the display medium.

[0144] As shown in Figures 2 and 3, Figure 2 does not include a third electrode, while Figure 3 includes a third electrode. Thus, the second barrier wall in Figure 2 may overlap with the first electrode in the thickness direction, while the first barrier wall in Figure 3 may not overlap with the first electrode in the thickness direction. This is because the presence of the third electrode can form a shielding electric field within the pixel unit, preventing charged particles from crosstalking between pixel units, thereby reducing the barrier wall's responsibility for blocking charged particles and thus lowering the thickness requirements for the first barrier wall. For display panels without a third electrode, a second barrier wall is required to prevent charged particles from crosstalking between pixel units. Therefore, the size of the second barrier wall in the thickness direction of the display medium should be as consistent as possible with the thickness of the display medium, so that the second barrier wall can achieve physical isolation of the crosstalk of charged particles as much as possible.

[0145] In a further implementation of this example, the dimension of the first retaining wall in the thickness direction of the display medium may be smaller than the thickness of the display medium.

[0146] The first retaining wall and the third electrode can be positioned opposite each other in the thickness direction of the display medium. Furthermore, the first retaining wall can be smaller than the thickness of the display medium. This arrangement allows for a slightly smaller first retaining wall, facilitating assembly. The presence of the third electrode creates a shielding electric field between pixel cells, thus reducing the requirements for the display panel's pixel wall process capability. Specifically, strict sealing between the first retaining wall and the second substrate is no longer required, thereby improving manufacturing efficiency and reducing costs.

[0147] Of course, in a display panel, all pixel units may have a third electrode, or none of the pixel units may have a third electrode. In this example, the first barrier wall and the second barrier wall refer to whether or not the third electrode is present. If all pixel units in a display panel have a third electrode, then the barrier wall in the display panel can be referred to as a first barrier wall. If none of the pixel units in a display panel have a third electrode, then the barrier wall in the display panel can be referred to as a second barrier wall. In other words, a display panel is not limited to having both a first barrier wall and a second barrier wall.

[0148] In another implementation of this example, the orthographic projection of the third electrode on the display medium may be covered by the orthographic projection of the first retaining wall on the display medium.

[0149] Continuing with FIG. 10 , each pixel unit in the display panel may include a third electrode. The third electrode may be disposed in the same layer as the first electrode so as to be located inside the display medium, or the third electrode may be disposed in a different layer from the first electrode so as to be located outside the display medium. In either configuration, the orthographic projection of the third electrode on the display medium may be covered by the orthographic projection of the first retaining wall on the display medium. For example, the orthographic projection of the third electrode on the first substrate is covered by the orthographic projection of the first retaining wall on the first substrate.

[0150] Using this example, when the third electrode is covered by the first retaining wall, the third electrode does not have a partial area that exceeds the first retaining wall, so that an electric field condition cannot be formed between the third electrode and the common electrode. Therefore, when a shielding electric field is formed between the third electrode and the first electrode, an electric field in the thickness direction can be avoided between the third electrode and the common electrode, thereby interfering with the movement of charged particles and affecting the shielding effect.

[0151] In another implementation of this example, the third electrode and the first electrode may be provided in the same layer, and a gap may exist between the first retaining wall and the third electrode.

[0152] In this example, referring to FIG3 , the third electrode and the first electrode are both located on the side of the first substrate proximate to the display medium, and the first retaining wall is located on the side of the second substrate proximate to the display medium. The first retaining wall and the third electrode are disposed relative to each other in the thickness direction of the display medium, with a gap between the first retaining wall and the third electrode. The gap can be approximately 0.01 μm in the thickness direction of the display medium, thereby reducing the sealing between the third electrode and the first retaining wall and allowing a gap to exist between them. This is because a shielding electric field can be formed between the third electrode and the first electrode. Therefore, even if the third electrode and the first retaining wall are not completely sealed, charged particles within the pixel unit can still be confined within the pixel unit, preventing crosstalk between the charged particles.

[0153] In conjunction with the above example, multiple first electrodes are arranged in an array within a pixel unit. In one arrangement, the multiple first electrodes can be arranged in multiple rows and columns within the pixel unit, wherein the row direction can be the arrangement direction of adjacent pixel units, and the column direction is orthogonal to the row direction. Referring to FIG11 , a top plan view of another display panel is shown. As shown in FIG11 , multiple first electrodes are arranged in an array within the pixel unit, wherein the multiple first electrodes include multiple sub-first electrodes 131 arranged along an extension direction at the intersection, wherein the extension direction is orthogonal to the arrangement direction of two adjacent pixel units; wherein the orthographic projection of the third electrode on the target plane in the thickness direction of the display medium covers the orthographic projections of the multiple sub-first electrodes on the target plane.

[0154] As shown in FIG11 , for two pixel cells adjacent along the x1 direction, the two pixel cells are arranged in the x1 direction, the direction of their intersection extending perpendicular to the x1 direction is the x2 direction, and the electrodes arranged along the x2 direction among the plurality of first electrodes are referred to as sub-first electrodes. For another example, for two pixel cells adjacent along the x2 direction, the two pixel cells are arranged in the x2 direction, the direction of their intersection extending perpendicular to the x2 direction is the x1 direction, and the electrodes arranged along the x1 direction among the plurality of first electrodes are referred to as sub-first electrodes 131.

[0155] Among them, since a third electrode is provided at the intersection of each two adjacent pixel units, the third electrode needs to form a planar shielding electric field with the first electrode. Therefore, the third electrode can simultaneously correspond to multiple sub-first electrodes. For example, the orthographic projection of the third electrode on the normal plane of the first substrate can cover the orthographic projections of multiple sub-first electrodes on the normal plane of the first substrate, and the normal plane of the first substrate is the aforementioned target plane. As a result, the third electrode can simultaneously form a shielding electric field with multiple spaced first sub-electrodes, thereby simplifying the manufacturing process of the third electrode. At the same time, the third electrode can be regarded as forming a continuous and uninterrupted barrier at the intersection of adjacent pixel units, isolating the crosstalk of charged particles in the pixel units.

[0156] In some other examples, to simplify and enhance the control of the electric field of each pixel unit, the third electrodes in multiple pixel units do not overlap with each other, that is, the third electrode does not overlap with any other third electrode. This allows for precise control of the shielding electric field of a single pixel unit. For example, pixel units that require a shielding electric field can be controlled separately from pixel units that do not require a shielding electric field, thereby saving power consumption of the display panel and improving control accuracy.

[0157] In some embodiments, the display panel may further include a driving module, which is used to control the electric field in each pixel unit. Specifically, the driving module can be connected to the common electrode and multiple first electrodes respectively. For multiple first electrodes, multiple first electrodes in a pixel unit can be connected to the driving module respectively through multiple signal lines.

[0158] Furthermore, since it is necessary to form an electric field in the thickness direction and an electric field in the planar direction within the pixel unit through the first electrode, different voltages need to be input to the multiple first electrodes within the pixel unit when forming the electric field in the planar direction, thereby forming a transverse electric field. The pixel unit may include an edge region and a middle region enclosed by the edge region; the multiple first electrodes located in the edge region of the pixel unit can be connected to the driving module via the same first signal line, while the multiple first electrodes located in the middle region of the pixel unit can be connected to the driving module via the same second signal line.

[0159] Referring to FIG12 , a schematic diagram of the circuit connection of the display panel is shown. As shown in FIG12 , the first electrodes located on the boundary of each pixel unit are connected to the driving module 20 by the same first signal line 191, as shown by the solid line in FIG12 . In this way, the voltages of the multiple first electrodes connected to the first signal line are consistent, and the voltage timing changes are the same. The first electrodes located in the middle area of ​​the pixel unit are connected to the driving module by the same first signal line 192, as shown by the dotted line in FIG12 . In this way, the voltages of the multiple first electrodes connected to the second signal line are consistent, and the voltage timing changes are the same. In this way, it is convenient to simplify the control logic of the multiple first electrodes when forming a lateral electric field. At the same time, it is possible to reduce the space occupied by the signal line on the display panel, thereby reducing the wiring difficulty.

[0160] Of course, in practice, each first electrode can be connected to the driving module through its own corresponding signal line, thereby achieving precise control of each first electrode.

[0161] Among them, the second electrodes in multiple pixel units can also be connected to the driving module through their own signal lines, and the third electrodes between multiple pixel units can also be connected to the driving module through their own signal lines, thereby achieving precise control of the electric field of a single pixel unit.

[0162] Below, a specific example is given to exemplarily illustrate the display panel of the present disclosure.

[0163] 4 and 5 , the pixel unit in the display panel may include:

[0164] a first substrate 15;

[0165] A second substrate 16, disposed opposite to the first substrate;

[0166] The display medium 11 is located between the first substrate and the second substrate and includes a plurality of charged particles;

[0167] A plurality of retaining walls 18 are located on a side of the second substrate close to the display medium, and the plurality of retaining walls define a plurality of pixel units 100;

[0168] The common electrode 12 is located on a side of the second substrate facing away from the display medium and entirely covers the second substrate, that is, located on a first side of the display medium in the thickness direction.

[0169] Each pixel unit includes:

[0170] A plurality of first electrodes 13 arranged at intervals are located on a side of the first substrate close to the display medium, that is, on the second side in the thickness direction of the display medium;

[0171] The second electrode 14 is located on a side of the first substrate facing away from the display medium, that is, on a second side of the display medium with the first electrode, and the orthographic projection of the second electrode on the first substrate covers the orthographic projections of the plurality of first electrodes on the first substrate;

[0172] The third electrode 17 is located on a side of the first substrate close to the display medium, that is, located on the second side of the display medium together with the first electrode, with a gap between the third electrode and the first electrode.

[0173] Among them, the spacing distance between the first electrodes is smaller than the electrode width of the first electrode; the spacing distance between the first electrode and the third electrode is smaller than the spacing distance between the first electrodes; the orthographic projection of the second electrode on the first substrate does not overlap with the orthographic projection of the third electrode on the first substrate.

[0174] The size of the third electrode in the normal direction of the first substrate is equal to the size of the first electrode in the normal direction of the first substrate.

[0175] Among them, the size of the retaining wall in the normal direction of the first substrate is smaller than the thickness of the display medium; the orthographic projection of the retaining wall on the first substrate covers the orthographic projection of the third electrode on the first substrate; and there is a small gap between the retaining wall and the third electrode, which can be about 0.01 μm. The two are not completely sealed, thereby reducing the sealing requirements of the pixel unit.

[0176] As shown in FIG11 , multiple first electrodes (called sub-first electrodes 131 ) are arranged in the extension direction of the intersection of adjacent pixel units. One third electrode can correspond to multiple sub-first electrodes at the same time, forming a shielding electric field between the multiple sub-first electrodes.

[0177] In which, the display panel may further include a driving module, and the common electrode may be connected to the driving module through a signal line. In order to achieve separate control of multiple pixel units, multiple first electrodes in the multiple pixel units may be respectively connected to the driving module so as to separately control the multiple first electrodes through the driving module, wherein the multiple second electrodes are also respectively connected to the driving module so as to independently control the multiple second electrodes; and the multiple third electrodes are also respectively connected to the driving module so as to independently control the multiple third electrodes.

[0178] Using this example display panel, on the one hand, the second electrode can compensate for the blind spot problem of the electric field in the thickness direction of the display medium caused by the gap between the first electrodes; on the other hand, the third electrode and the first electrode can form a shielding electric field within the pixel unit, thereby limiting the movement of charged particles within the pixel unit and avoiding crosstalk between charged particles between pixel units.

[0179] Based on the same inventive concept, the present disclosure further provides a method for driving a display panel. FIG13 shows a schematic flow chart of the steps of a method for driving a display panel in an embodiment. As shown in FIG13 , the driving method may include the following steps:

[0180] Step S101 : in a first stage when a pixel unit changes from a first display color to a second display color, determining a target direction of an electric field currently existing in the pixel unit based on the first display color.

[0181] Step S102: Based on the target direction, outputting voltages that change in a time sequence to a plurality of first electrodes in the pixel unit to form an alternating electric field in the target direction.

[0182] Step S103: outputting an auxiliary voltage to the second electrode and / or the third electrode to assist the alternating electric field and disperse charged particles in the display medium.

[0183] In this embodiment, the display panel may include a second electrode and / or a third electrode, wherein the first electrode in each pixel unit can be controlled individually. The method can be for controlling a single pixel unit, and the above steps can be used for each pixel unit.

[0184] The first display color is different from the second display color. For example, the first display color may be black and the second display color may be white, or the first display color may be white and the second display color may be black.

[0185] When the pixel unit changes from the first display color to the second display color, it indicates that the pixel unit needs to switch colors, and the direction of the electric field in the pixel unit needs to be changed, such as switching from a horizontal electric field to a vertical electric field, or from a vertical electric field to a horizontal electric field. During the electric field switching process, the distribution of charged particles in the pixel unit when the first display color is displayed must be disrupted. Therefore, an alternating electric field must be generated in the pixel unit to disrupt the aggregation of charged particles and disperse them into various areas of the pixel unit. This stage is called the first stage.

[0186] When generating an alternating electric field to disrupt the distribution of charged particles, that is, in the first stage, the target direction of the electric field currently existing in the pixel unit can be determined based on the first display color, thereby forming an alternating electric field in the target direction. Specifically, it is necessary to control the output voltages of multiple first electrodes to change according to the corresponding timing to generate an alternating electric field in the target direction.

[0187] For example, assuming that the charged particles are black particles, the first display color is black, and the second display color is white, then an alternating electric field needs to be formed in the thickness direction of the display medium. In this case, the voltages of all the first electrodes can be changed in the same timing, thereby forming an alternating electric field with a continuously changing direction in the thickness direction.

[0188] As another example, assuming that the charged particles are black particles, the first display color is white, and the second display color is black, an alternating electric field needs to be formed in the screen direction of the display medium. Then, some of the multiple first electrodes can change the voltage according to one timing sequence, and another part of the first electrodes can change the power supply according to another timing sequence, thereby forming an alternating electric field with a continuously changing direction in the plane direction (x direction).

[0189] In step S103 , since the display panel includes the second electrode and / or the third electrode, in the first stage, an auxiliary voltage may be output to the second electrode and / or the third electrode to assist the alternating electric field and disperse the charged particles in the display medium.

[0190] For example, if the display panel includes a second electrode and a third electrode, when forming an alternating electric field in the thickness direction, the auxiliary voltage of the second electrode can be caused to change in the same timing as the voltage of the first electrode. Thus, the auxiliary voltage of the second electrode can more evenly disperse the charged particles. When forming an alternating electric field in the planar direction, the second electrode does not need to provide an auxiliary voltage, but the third electrode can provide an auxiliary voltage. The auxiliary voltage provided by the third electrode can restrict the movement of charged particles within the pixel unit and prevent crosstalk between adjacent pixel units.

[0191] By adopting the driving method of this embodiment, the voltage of each electrode and the voltage change timing can be controlled according to the image to be displayed by each pixel unit. Since the second electrode and / or the third electrode are included, the uniformity of the display color of the display panel can be improved.

[0192] In one example, referring to Figures 14 and 15, Figure 14 shows a schematic diagram of the cross-sectional structure of three adjacent pixel units, and Figure 15 shows the timing voltage of the control voltage of the electrode in the pixel unit under a scenario. As shown in Figures 14 and 15, the scenario is for a first pixel unit and a second pixel unit that display opposite color changes.

[0193] The opposite display color change means that the first pixel unit changes from the first display color to the second display color, and the second pixel unit changes from the second display color to the first display color. For these two pixel units, a first alternating voltage can be output to the multiple first electrodes in the first pixel unit based on the target direction corresponding to the first pixel unit, and a second alternating voltage can be output to the multiple first electrodes in the second pixel unit based on the target direction corresponding to the second pixel unit.

[0194] Specifically, as shown in FIG14 , Cell1 , Cell2 , and Cell3 are three pixel units, respectively, including three first electrodes 13 . The display colors of two adjacent pixel units in the three different pixel units change in opposite directions, wherein the voltage change timing of the first electrode 13 is shown in FIG15 .

[0195] The voltage of multiple first electrodes (S1-S3, (S7-S9)) in the first pixel units Cell1 and Cell3 can be changed in the same timing sequence, thereby forming an alternating electric field with a continuously changing direction in the thickness direction; the first electrodes (S4 and S6) located at the boundary among the multiple first electrodes in the second pixel unit Cell2 can be changed in voltage in one timing sequence, and the first electrode (S5) located in the middle can be changed in voltage in another timing sequence, thereby forming an alternating electric field with a continuously changing direction in the plane direction (x direction).

[0196] In this case, as shown in FIG15 , when the auxiliary voltage is output to the second electrode and / or the third electrode, a first constant voltage may be output to the third electrode WE located between the first pixel unit and the second pixel unit, wherein the first constant voltage is higher than the highest voltage on the first electrodes (S1-S3) in the first pixel unit and higher than the highest voltage on the first electrodes (S4-S6) in the second pixel unit.

[0197] Furthermore, in the case of including a second electrode, in the first stage, as shown in FIG15 , the target direction in the first pixel unit is the thickness direction of the display medium, and the target direction in the second pixel unit is the direction orthogonal to the thickness direction. Then, a voltage with the same timing as the first electrode can be output to the second electrode in the first pixel unit to form an electric field in the thickness direction between the second electrode and the common electrode;

[0198] Furthermore, a constant voltage consistent with the voltage of the common electrode is output to the second electrode located in the second pixel unit to assist the electric field in the planar direction of the display medium in the second pixel unit.

[0199] In this example, as shown in FIG15 , the first pixel unit needs to form an alternating electric field in the thickness direction in the first stage. Then, the voltage timing of all the first electrodes (S1-S3) in the first pixel unit is consistent, and the voltage change timing of the second electrode BE1 in the first pixel unit is the same as that of the first electrode in the first pixel unit. This can avoid the problem of unevenness caused by the lack of movement of charged particles in the gap between the first electrodes due to the electric field blind spot. In addition, an electric field needs to be formed in the planar direction in the second pixel unit. At this time, in order to avoid the formation of an electric field between the common electrode and the first electrode, a second constant voltage can be output to the third electrode BE2 in the second pixel unit. The voltage value of this constant voltage can be consistent with the voltage value of the common voltage, thereby offsetting the electric field between the first electrode and the common electrode, helping to uniformly disrupt the charged particles in the planar direction.

[0200] In some examples, since the pixel unit needs to change from a first display color to a second display color, the charged particles are disrupted in the first stage, and then in the second stage, an electric field needs to be provided to move the charged particles to a position where the second display color is displayed. Specifically, in the second stage after the first stage, the first driving voltage corresponding to each of the plurality of first electrodes can be output based on the second display color.

[0201] And, outputting a second driving voltage to the second electrode based on the second display color; wherein the second driving voltage is the same as the first driving voltage, or the second driving voltage is the same as the voltage of the common electrode.

[0202] In this embodiment, the electric field direction required for the pixel unit in the second stage can be determined based on the second display color, and then, based on the electric field direction, the first driving voltage corresponding to each first electrode is output. For example, if the electric field direction is the thickness direction of the display medium, then each first electrode outputs the same first driving voltage. If the electric field direction is the plane direction of the display medium, then the first electrodes located in the edge region output one first driving voltage, and the first electrodes located in the middle region output another first driving voltage, so that an electric field is formed in the pixel unit in a direction from the middle region to the edge region, driving the charged particles to move toward the edge of the pixel unit, thereby displaying the corresponding display color.

[0203] In this example, a corresponding second driving voltage can be output to the second electrode based on the second display color, wherein the second driving voltage can be the same as the first driving voltage. For example, when the direction of the electric field is the thickness direction, the first driving voltage is the same as the second driving voltage; when the direction of the electric field is the planar direction, the second driving voltage is the same as the voltage of the common electrode. In this way, the second driving voltage can offset the weaker electric field in the thickness direction inside the pixel unit, so that the electric field inside the pixel unit is all in the planar direction.

[0204] In another embodiment, a third pixel unit and a fourth pixel unit that are adjacent and have the same color change can be determined, and a third constant voltage can be output to a third electrode located between the third pixel unit and the fourth pixel unit; wherein the third constant voltage is a preset voltage.

[0205] In this embodiment, the same color change means that the third pixel unit and the fourth pixel unit both change from the first display color to the second display color, and the frequency of the change may be the same. Therefore, the directions of the alternating electric fields in the third pixel unit and the fourth pixel unit in the first stage are consistent. In this case, a third constant voltage may be output to the third electrode located between the third pixel unit and the fourth pixel unit based on the target direction.

[0206] The third constant voltage is a preset voltage.

[0207] Among them, when the target direction is the thickness direction, it indicates that an alternating electric field in the thickness direction is to be formed. At this time, the timing changes of the voltages of the first electrodes in the third pixel unit and the fourth pixel unit are the same, and the timing changes of the voltage of the common electrode are opposite to those of the first electrode. Then, the third constant voltage of the third electrode can be a preset voltage, such as 0V.

[0208] Among them, when the target direction is a planar direction, it indicates that an alternating electric field in the planar direction is to be formed. At this time, the timing changes of the voltages of the first electrodes located at the boundaries in the third pixel unit and the fourth pixel unit are the same, and the timing changes of the voltages of the first electrodes located in the middle area are opposite. Then, the third constant voltage of the third electrode can also be 0V.

[0209] In combination with the above embodiment, the first electrode located in the edge area of ​​the pixel unit can be connected to the driving module through the same first signal line, and the first electrode located in the middle area of ​​the pixel unit can be connected to the driving module through the same second signal line. When driving, this feature can be utilized to group the pixel units that display the same color change as a group, and use the same timing control logic to control the voltage of the first electrode in the pixel units that display the same color change.

[0210] Specifically, the plurality of first electrodes in the pixel unit can be divided into a first electrode group, a second electrode group, and a third electrode group. The first electrode group and the second electrode group are located at the edge region of the pixel unit, and the second electrode group is located between the first electrode group and the third electrode group. Thus, in the first stage, for a plurality of target pixel units with the same color change, a voltage that changes according to a first time sequence can be output to the second electrode group in each target pixel unit, and a voltage that changes according to a second time sequence can be output to the first electrode group and the third electrode group in each target pixel unit.

[0211] In this example, regardless of whether the target direction is the thickness direction or the plane direction, the first electrode group and the third electrode group in multiple target pixel units can be centrally controlled as a control group, and the second electrode group in multiple target pixel units can be centrally controlled as a control group.

[0212] For example, when the target direction is the thickness direction, the second electrode group in each target pixel unit outputs a voltage that changes according to a first timing sequence, and the third electrode group and the first electrode group in each target pixel unit also output a voltage that changes according to a second timing sequence, wherein the first timing sequence and the second timing sequence can be the same.

[0213] For example, when the target direction is a planar direction, the second electrode group in each target pixel unit outputs a voltage that changes according to a first timing sequence, and the third electrode group and the first electrode group in each target pixel unit also output a voltage that changes according to a second timing sequence, wherein the first timing sequence and the second timing sequence are opposite.

[0214] This configuration simplifies the control of each pixel unit.

[0215] Then, in the second stage, the electric field direction in the second stage can be determined based on the second display color. According to the electric field direction, the same third driving voltage can be output to the second electrode group in each target pixel unit, and the same fourth driving voltage can be output to the first electrode group and the third electrode group in each target pixel unit.

[0216] For example, when the electric field direction in the second stage is the thickness direction, the third driving voltage output by the second electrode group in each target pixel unit can be the same as the fourth driving voltage output by the third electrode group and the first electrode group in each target pixel unit.

[0217] For example, when the electric field direction in the second stage is in the planar direction, the third driving voltage output by the second electrode group in each target pixel unit may be opposite to the fourth driving voltage output by the third electrode group and the first electrode group in each target pixel unit. However, the fourth driving voltages of the first electrode group and the third electrode group in different target pixel units are the same, and the third driving voltages of the second electrode groups in different target pixel units are the same.

[0218] Below, taking the display panel given in Figure 14 as an example, Cell1, Cell2, and Cell3 are three pixel units respectively, and the first electrode at the bottom of the pixel unit (taking the slit division number = 3 as an example) provides different voltages, among which Slit1, Slit4, and Slit7 are a group named D1, and the same timing is designed; among which Slit2, Slit5, and Slit8 are a group named D2, and the same timing is designed; among which Slit3, Slit6, and Slit9 are a group named D3.

[0219] Here are some example driving methods:

[0220] Example 1, as shown in FIG16, shows a driving timing diagram of the entire display panel display image changing from black to white; As shown in FIG16, the entire display panel display image changes from black to white, and the driving scheme under this structure is designed as follows:

[0221] In the first stage, an alternating electric field is applied in the longitudinal direction (thickness direction) to break up the black particles on the bottom and distribute them evenly in the cell.

[0222] In the second stage, negative potentials are applied to the first electrode D1 in the first group and the first electrode D3 in the third group, respectively, while a positive potential is applied to the first electrode D2 in the second group. The second electrode BE at the bottom does not provide a signal and is in a floating state (the initial state is 0V, which is applied before the end of stage 1). This can pull the evenly dispersed particles to both sides of the pixel unit.

[0223] Example 2, as shown in FIG17 , shows another driving timing diagram of the entire display panel display image changing from black to white; as shown in FIG17 , the difference from Example 1 is that in the second stage, a 0V voltage is applied to the second electrode BE at the bottom.

[0224] Example 3, as shown in FIG18, shows a driving timing diagram of the entire display panel display image from white to black; as shown in FIG18,

[0225] Phase 1: The first electrodes of the three groups D1, D2, and D3 apply a transverse alternating electric field to break up the black charged particles accumulated on both sides of the pixel unit and evenly distribute them inside the pixel unit;

[0226] The second stage: negative potentials are applied to the first electrodes of the three groups D1, D2, and D3 and the second electrode BE at the bottom, respectively, to form a longitudinal driving electric field with the common electrode, which can spread the evenly dispersed charged particles to the bottom.

[0227] Example 4, as shown in Figure 19, shows another driving timing diagram in which the display screen of the entire display panel changes from white to black; as shown in Figure 19, different from Example 3, in the second stage, the three groups of first electrodes D1, D2, and D3 do not provide signals and are in a floating state (the initial state is 0V, and the initial potential is input before the end of stage1), and a negative potential is applied to the bottom second electrode BE, respectively, to form a longitudinal driving electric field with the common electrode, which can spread the evenly dispersed particles to the bottom.

[0228] Example 5, as shown in FIG20 , shows a driving timing diagram of two adjacent pixel units changing at the same time and frequency (displaying the same color change), as shown in FIG20 :

[0229] Phase 1: The first electrodes of the three groups D1, D2, and D3 apply a longitudinal (transverse) alternating electric field to break up the black particles that are flat on the bottom of the cell (or accumulated on both sides of the cell) and evenly distribute them inside the cell.

[0230] In the second stage, negative potentials are applied to the first electrode D1 of the first group and the first electrode D3 of the third group, while positive potential is applied to the first electrode D2 of the second group. 0V voltage is applied to the second electrode BE and the third electrode WE at the bottom. At this time, the evenly dispersed particles can be pulled to both sides of the cell.

[0231] Example 6, as shown in Figure 21, shows another driving timing diagram in which two adjacent pixel units of the entire display panel change simultaneously and at the same frequency (display color changes are the same). As shown in Figure 21, the difference from Example 5 is that in the second stage, the bottom second electrode BE is applied with a 0V voltage, and the third electrode WE does not provide a signal and is in a floating state (the initial state is 0V, and the initial potential is input before the end of stage 1).

[0232] Example 7, as shown in Figure 15, two adjacent cells oscillate and disperse the charged particles in the horizontal and vertical directions respectively. During this stage, electric field crosstalk between pixels is likely to occur, leading to particle migration. Therefore, its control logic is:

[0233] In the first stage, a longitudinal alternating voltage is applied to the first electrodes S1, S2, S3, S7, S8, and S9, as well as the second electrode BE at the bottom of Cell1 and Cell3, forming a longitudinal alternating electric field with the common electrode to break up the black particles spread at the bottom of the cell and evenly distribute them within the pixel unit.

[0234] The first electrodes S3, S4, and S5 apply a transverse alternating electric field to break up the black particles accumulated on both sides of the cell and evenly distribute them inside the cell. The third electrode WE applies a higher positive potential (greater than the potential of the first electrodes), thus forming a shielding electric field around the retaining wall to prevent the migration of charged particles.

[0235] The embodiment of the present disclosure further provides a computer-readable storage medium, which stores a computer program that enables a processor to execute the method for driving a display panel as described in the embodiment of the present disclosure.

[0236] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0237] Finally, it should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity, or device that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, commodity, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, commodity, or device that includes the element.

[0238] The above is a detailed introduction to a display panel and a method for driving a display panel provided by the present disclosure. Specific examples are used herein to illustrate the principles and implementation methods of the present disclosure. The description of the above embodiments is only used to help understand the method and core idea of ​​the present disclosure. At the same time, for those skilled in the art, according to the idea of ​​the present disclosure, there may be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present disclosure.

[0239] Other embodiments of the present disclosure will readily occur to those skilled in the art after considering the specification and practicing the invention disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered as exemplary only, with the true scope and spirit of the present disclosure being indicated by the following claims.

[0240] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes can be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

[0241] References herein to "one embodiment," "an embodiment," or "one or more embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present disclosure. Furthermore, please note that instances of the phrase "in one embodiment" do not necessarily all refer to the same embodiment.

[0242] In the description provided herein, numerous specific details are described. However, it is understood that embodiments of the present disclosure may be practiced without these specific details. In some instances, well-known methods, structures, and techniques are not shown in detail so as not to obscure the understanding of this description.

[0243] In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in the claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The present disclosure may be implemented by means of hardware comprising several different elements and by means of a suitably programmed computer. In a unit claim enumerating several means, several of these means may be embodied by the same item of hardware. The use of the words first, second, and third etc. does not indicate any order. These words may be interpreted as names.

[0244] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present disclosure, rather than to limit them. Although the present disclosure has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present disclosure.

Claims

1. A display panel, wherein: A plurality of pixel units are included, each pixel unit comprising: a display medium comprising a plurality of charged particles; a common electrode, located on a first side in a thickness direction of the display medium; a plurality of first electrodes arranged at intervals, located on a second side in a thickness direction of the display medium, the first side being opposite to the second side; and a second electrode and / or a third electrode, located on the second side; The second electrode is located on a side of the first electrode facing away from the display medium, and the orthographic projection of the second electrode on the display medium at least covers the orthographic projections of the gaps between multiple first electrodes on the display medium; the third electrode is located at the intersection of two adjacent pixel units, and the orthographic projection of the third electrode on the display medium does not overlap with the orthographic projection of the first electrode on the display medium.

2. A display panel according to claim 1, wherein: The orthographic projection of the second electrode on the display medium covers the orthographic projections of a plurality of the first electrodes in the pixel unit on the display medium.

3. The display panel according to claim 1, wherein: The spacing distance between two adjacent first electrodes is smaller than the size of the first electrode in a target direction; wherein the target direction is a direction from one pixel unit to another adjacent pixel unit.

4. The display panel according to claim 1, wherein: A first spacing distance between a plurality of the first electrodes in a pixel unit including the second electrode is greater than a second spacing distance between a plurality of the first electrodes in a pixel unit not including the second electrode.

5. The display panel according to claim 1, wherein: It includes the second electrode and the third electrode; wherein the orthographic projection of the second electrode on the display medium does not overlap with the orthographic projection of the third electrode on the display medium.

6. The display panel according to claim 1, wherein: The third electrode is arranged in the same layer as the first electrode.

7. The display panel according to claim 1, wherein: It includes the second electrode and the third electrode, and the third electrode is arranged in the same layer as the second electrode.

8. The display panel according to claim 1, wherein: The third electrode is provided in the same layer as the first electrode; wherein the spacing distance between the third electrode and the first electrode located at the edge of the pixel unit is smaller than the spacing distance between the plurality of first electrodes.

9. The display panel according to claim 1, wherein: A retaining wall is provided at the intersection between each two adjacent pixel units, wherein the retaining wall extends in the thickness direction of the display medium; The dimension of the first blocking wall in the pixel unit having the third electrode in the thickness direction is smaller than the dimension of the second blocking wall in the pixel unit not having the third electrode in the thickness direction.

10. The display panel according to claim 9, wherein: A dimension of the first retaining wall in a thickness direction of the display medium is smaller than a thickness of the display medium.

11. The display panel according to claim 9, wherein: The orthographic projection of the third electrode on the display medium is covered by the orthographic projection of the first retaining wall on the display medium.

12. The display panel according to claim 9, wherein: The first electrode and the third electrode are arranged in the same layer, and a gap is provided between the first retaining wall and the third electrode.

13. The display panel according to claim 1, wherein: The plurality of first electrodes include a plurality of sub-first electrodes arranged along an extension direction of the intersection, wherein the extension direction is orthogonal to an arrangement direction of two adjacent pixel units; The orthographic projection of the third electrode on the target plane in the thickness direction of the display medium covers the orthographic projections of the plurality of sub-first electrodes on the target plane.

14. The display panel according to claim 1, wherein: The display panel further includes a driving module, and the pixel unit includes an edge area and a middle area enclosed by the edge area; The plurality of first electrodes on the edge region are connected to the driving module via a same first signal line, and the first electrodes in the middle region are connected to the driving module via a same second signal line.

15. A method for driving a display panel, wherein: The driving method is applied to a display panel according to any one of claims 1 to 14, and the driving method includes: In a first stage in which a pixel unit changes from a first display color to a second display color, determining a target direction of an electric field currently existing in the pixel unit based on the first display color; Based on the target direction, outputting voltages that change in a time sequence to a plurality of first electrodes in the pixel unit to form an alternating electric field in the target direction; and An auxiliary voltage is output to the second electrode and / or the third electrode to assist the alternating electric field and disperse charged particles in the display medium.

16. The method for driving a display panel according to claim 15, wherein: Outputting an auxiliary voltage to the second electrode and / or the third electrode comprises: Determine a first pixel unit and a second pixel unit that are adjacent and have opposite display color changes, the first pixel unit changes from the first display color to the second display color, and the second pixel unit changes from the second display color to the first display color; outputting a first constant voltage to a third electrode located between the first pixel unit and the second pixel unit; The first constant voltage is higher than the highest voltage on the first electrode in the first pixel unit, and higher than the highest voltage on the first electrode in the second pixel unit.

17. A method for driving a display panel according to claim 16, wherein: The target direction in the first pixel unit is the thickness direction of the display medium, and the target direction in the second pixel unit is a direction orthogonal to the thickness direction; outputting the auxiliary voltage to the second electrode and / or the third electrode includes: outputting a voltage with the same timing as that of the first electrode to the second electrode located in the first pixel unit, so as to form an alternating electric field in the thickness direction between the second electrode and the common electrode; A second constant voltage consistent with the voltage of the common electrode is output to the second electrode located in the second pixel unit.

18. The method for driving a display panel according to claim 15, wherein: The method further comprises: In a second stage after the first stage, based on the second display color, outputting first driving voltages corresponding to the plurality of first electrodes; and outputting a second driving voltage to the second electrode based on the second display color; The second driving voltage is the same as the first driving voltage, or the second driving voltage is the same as the voltage of the common electrode.

19. The method for driving a display panel according to claim 15, wherein: The outputting an auxiliary voltage to the second electrode and / or the third electrode comprises: determining a third pixel unit and a fourth pixel unit that have the same color change and are adjacent to each other; outputting a third constant voltage to a third electrode located between the third pixel unit and the fourth pixel unit based on the target direction; Wherein, the third constant voltage is a preset voltage.

20. The method for driving a display panel according to claim 15, wherein: The plurality of first electrodes in the pixel unit are divided into a first electrode group, a second electrode group, and a third electrode group, the first electrode group and the second electrode group are located in an edge region of the pixel unit, and the second electrode group is located between the first electrode group and the third electrode group; outputting voltages that change in a time sequence to the plurality of first electrodes in the pixel unit based on the target direction includes: Determine a plurality of target pixel units having the same color change; Based on the target direction, outputting a voltage that changes according to a first time sequence to the second electrode group in each target pixel unit, and outputting a voltage that changes according to a second time sequence to the first electrode group and the third electrode group in each target pixel unit; The method further comprises: In a second stage after the first stage, based on the second display color, the same third driving voltage is output to the second electrode group in each target pixel unit, and the same fourth driving voltage is output to the first electrode group and the third electrode group in each target pixel unit.

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