Display panel and display device

Abstract

The invention discloses a display panel and a display device.The display panel comprises a first substrate, a second substrate and an electrophoresis layer located between the first substrate and the second substrate and further comprises cofferdams located between the first substrate and the second substrate, and the multiple cofferdams correspond to multiple first electrodes on the first substrate; the orthographic projection of the cofferdam on the first substrate at least surrounds one side of the orthographic projection of the first electrode on the first substrate, so that when the display panel is in a first state, the first electrode and the second electrode are used for controlling the black particles to move towards the first electrode and controlling the white particles to move towards the second electrode; the cofferdam is used for blocking the black particles moving to the corresponding area of the first electrode, so that the probability that the black particles are diffused from the corresponding area of the first electrode to the corresponding area of the second electrode due to the concentration gradient is reduced; the stability of the display panel in the first state is improved.

Description

Technical Field

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

[0002] Electronic paper display technology combines the advantages of traditional paper and modern digital display technologies. Its low power consumption and wide viewing angle make it popular with users. However, the stability of the transparent state of current electronic paper-based display panels needs to be improved. Summary of the Invention

[0003] In view of the above problems, the present application provides a display panel and a display device to improve the stability of the display panel when it is in a transparent state. The specific solution is as follows:

[0004] A display panel, comprising:

[0005] a first substrate and a second substrate arranged opposite to each other;

[0006] an electrophoretic layer located between the first substrate and the second substrate, the electrophoretic layer comprising a dielectric layer and electrophoretic particles located in the dielectric layer;

[0007] a plurality of electrodes located on a side of the first substrate facing the second substrate, the plurality of electrodes including a plurality of first electrodes and a plurality of second electrodes, the second electrodes being transparent electrodes;

[0008] a plurality of dams located between the first substrate and the second substrate, the plurality of dams being arranged corresponding to the plurality of first electrodes, and the orthographic projections of the dams on the first substrate surrounding at least one side of the orthographic projection of the first electrode on the first substrate;

[0009] The dam has at least one gap, and the display panel has a first state. In the first state, the transmittance of the area corresponding to the first electrode is less than the transmittance of the area corresponding to the second electrode.

[0010] A display device comprises the above-mentioned display panel.

[0011] The display panel provided by the embodiment of the present application not only includes a first substrate, a second substrate, and an electrophoretic layer located between the first substrate and the second substrate, but also includes a dam located between the first substrate and the second substrate. Multiple dams are arranged corresponding to multiple first electrodes on the first substrate, and the orthographic projection of the dam on the first substrate at least surrounds one side of the orthographic projection of the first electrode on the first substrate. Therefore, when the display panel is in the first state, the first electrode and the second electrode are used to control the movement of black particles to the position of the first electrode and the movement of white particles to the position of the second electrode, so that the transmittance of the area corresponding to the first electrode is less than the transmittance of the area corresponding to the second electrode, and the dam is used to block the black particles moving to the area corresponding to the first electrode, thereby reducing the probability of their diffusion from the area corresponding to the first electrode to the area corresponding to the second electrode due to concentration gradient, thereby improving the stability of the display panel in maintaining the first state. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The above and other features, advantages, and aspects of the various embodiments of the present disclosure will become more apparent with reference to the following detailed description in conjunction with the accompanying drawings. Throughout the drawings, the same or similar reference numerals represent the same or similar elements. It should be understood that the drawings are schematic and that the originals and elements are not necessarily drawn to scale.

[0013] Figure 1 Schematic diagram of the distribution of black particles and white particles in the display panel when the display panel is in a transparent state;

[0014] Figure 2 Schematic diagram of the distribution of black particles and white particles in the display panel when the display panel is in a white state;

[0015] Figure 3 Schematic diagram of the distribution of black particles and white particles in the display panel when the display panel is in a black state;

[0016] Figure 4 is a schematic diagram of the distribution of black particles and white particles in the display panel when the display panel is in a grayscale state;

[0017] Figure 5 A cross-sectional view of a display panel provided in this application;

[0018] Figure 6 A partial top view of a display panel provided in this application;

[0019] Figure 7 A partial enlarged view of a display panel provided in this application;

[0020] Figure 8 for Figure 7 Cross-sectional view along direction AA1;

[0021] Figure 9A partial enlarged view of a display panel provided in this application;

[0022] Figure 10 for Figure 9 Cross-sectional view along direction AA1;

[0023] Figure 11 A partial top view of another display panel provided in this application;

[0024] Figure 12 A partial top view of another display panel provided in the present application;

[0025] Figure 13 A partial top view of another display panel provided in this application;

[0026] Figure 14 for Figure 12 A schematic projection diagram of a structure consisting of four adjacent cofferdams in the row direction and the column direction and their corresponding first electrodes on the first substrate;

[0027] Figure 15 A partial top view of another display panel provided in the present application;

[0028] Figure 16 for Figure 15 A schematic projection diagram of a structure consisting of four adjacent cofferdams in the row direction and the column direction and their corresponding first electrodes on the first substrate;

[0029] Figure 17 A partial top view of another display panel provided in this application;

[0030] Figure 18 for Figure 17 A schematic projection diagram of a structure consisting of four adjacent cofferdams in the row direction and the column direction and their corresponding first electrodes on the first substrate;

[0031] Figure 19 A partial top view of another display panel provided in the present application;

[0032] Figure 20 for Figure 19 A schematic projection diagram of a structure consisting of four adjacent cofferdams in the row direction and the column direction and their corresponding first electrodes on the first substrate;

[0033] Figure 21 A partial top view of another display panel provided in this application;

[0034] Figure 22 for Figure 21 A schematic projection diagram of a structure consisting of four adjacent cofferdams in the row direction and the column direction and their corresponding first electrodes on the first substrate;

[0035] Figure 23 A partial top view of another display panel provided in the present application;

[0036] Figure 24 for Figure 23 A schematic projection diagram of a structure consisting of four adjacent cofferdams in the row direction and the column direction and their corresponding first electrodes on the first substrate;

[0037] Figure 25 A partial top view of another display panel provided in this application;

[0038] Figure 26 for Figure 25 A schematic projection diagram of a structure consisting of four adjacent cofferdams in the row direction and the column direction and their corresponding first electrodes on the first substrate;

[0039] Figure 27 A partial top view of another display panel provided in the present application;

[0040] Figure 28 for Figure 27 A schematic projection diagram of a structure consisting of four adjacent cofferdams in the row direction and the column direction and their corresponding first electrodes on the first substrate;

[0041] Figure 29 A partial top view of another display panel provided in this application;

[0042] Figure 30 for Figure 29 A schematic projection diagram of a structure consisting of four adjacent cofferdams in the row direction and the column direction and their corresponding first electrodes on the first substrate;

[0043] Figure 31 A partial top view of another display panel provided in the present application;

[0044] Figure 32 for Figure 31 A schematic projection diagram of a structure consisting of four adjacent cofferdams in the row direction and the column direction and their corresponding first electrodes on the first substrate;

[0045] Figure 33 A partial top view of another display panel provided in this application;

[0046] Figure 34 for Figure 33 A schematic projection diagram of a structure consisting of four adjacent cofferdams in the row direction and the column direction and their corresponding first electrodes on the first substrate;

[0047] Figure 35 A partial top view of another display panel provided in the present application;

[0048] Figure 36 for Figure 35 A schematic projection diagram of a structure consisting of four adjacent cofferdams in the row direction and the column direction and their corresponding first electrodes on the first substrate;

[0049] Figure 37 A partial top view of another display panel provided in this application;

[0050] Figure 38 for Figure 37 A schematic projection diagram of a structure consisting of four adjacent cofferdams in the row direction and the column direction and their corresponding first electrodes on the first substrate;

[0051] Figure 39 A partial top view of another display panel provided in the present application;

[0052] Figure 40 for Figure 39 A schematic projection diagram of a structure consisting of four adjacent cofferdams in the row direction and the column direction and their corresponding first electrodes on the first substrate;

[0053] Figure 41 A partial top view of another display panel provided in this application;

[0054] Figure 42 for Figure 41 A schematic projection diagram of a structure consisting of four adjacent cofferdams in the row direction and the column direction and their corresponding first electrodes on the first substrate;

[0055] Figure 43 A partial top view of another display panel provided in the present application;

[0056] Figure 44 for Figure 43 A schematic projection diagram of a structure consisting of four adjacent cofferdams in the row direction and the column direction and their corresponding first electrodes on the first substrate;

[0057] Figure 45 for Figure 41 Cross-sectional view along BB1;

[0058] Figure 46 A partial top view of another display panel provided in the present application;

[0059] Figure 47 A partial top view of another display panel provided in this application;

[0060] Figure 48 A partial top view of another display panel provided in the present application;

[0061] Figure 49 A partial top view of another display panel provided in this application;

[0062] Figure 50 A partial top view of another display panel provided in the present application;

[0063] Figure 51 A partial top view of another display panel provided in this application;

[0064] Figure 52 A partial top view of another display panel provided in the present application;

[0065] Figure 53 A partial top view of another display panel provided in this application;

[0066] Figure 54 A partial top view of another display panel provided in the present application;

[0067] Figure 55 A partial top view of another display panel provided in this application;

[0068] Figure 56 A partial top view of another display panel provided in the present application;

[0069] Figure 57 A partial top view of another display panel provided in this application;

[0070] Figure 58 A partial top view of another display panel provided in the present application;

[0071] Figure 59 A partial top view of another display panel provided in this application;

[0072] Figure 60 for Figure 59 A cross-sectional view along CC1;

[0073] Figure 61 for Figure 59 Another cross-sectional view along CC1;

[0074] Figure 62 A schematic diagram of a display device provided in one embodiment of the present application. DETAILED DESCRIPTION

[0075] The following will be combined with the accompanying drawings in the embodiments of this application to clearly and completely describe the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0076] It will be apparent to those skilled in the art that various modifications and variations can be made to this application without departing from the spirit or scope of this application. Therefore, this application is intended to cover modifications and variations of this application that fall within the scope of the corresponding claims (technical solutions claimed for protection) and their equivalents. It should be noted that the embodiments provided in the examples of this application may be combined with each other unless there is any inconsistency.

[0077] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the present application is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0078] As described in the background technology section, when a display panel based on the current electronic paper display technology is in a transparent state, the stability of the transparent state needs to be improved.

[0079] The display panel based on the electronic paper display technology includes an upper substrate and a lower substrate arranged opposite to each other, and black particles and white particles located between the upper substrate and the lower substrate. Figure 1-Figure 4 As shown, Figure 1 shows a schematic diagram of the distribution of black particles and white particles when the display panel is in a transparent state; Figure 2 shows a schematic diagram of the distribution of black particles and white particles when the display panel is in a white state; Figure 3 shows a schematic diagram of the distribution of black particles and white particles when the display panel is in a black state; Figure 4 A schematic diagram showing the distribution of black particles and white particles when the display panel is in a grayscale state is shown.

[0080] from Figure 1 It can be seen that when the display panel is in a transparent state, the black particles are only located in the non-transparent area, and the concentration gradient in the transparent area and the non-transparent area is large. In order to maintain the transparency of the display panel, the electrode area in the non-transparent area is smaller, resulting in a narrow aggregation area of the black particles, which makes it difficult to maintain vertical concentration. As a result, some of the black particles are easily diffused from the non-transparent area to the transparent area, affecting the transparency of the display panel and making the transparency of the display panel less stable.

[0081] In view of this, an embodiment of the present application provides a display panel, such as Figure 5 As shown, the display panel includes:

[0082] A first substrate 10 and a second substrate 20 arranged opposite to each other;

[0083] an electrophoretic layer located between the first substrate 10 and the second substrate 20 , the electrophoretic layer including a dielectric layer and electrophoretic particles 30 located in the dielectric layer;

[0084] A plurality of electrodes 40 are located on the side of the first substrate 10 facing the second substrate 20 . The plurality of electrodes 40 include a plurality of first electrodes 41 and a plurality of second electrodes 42 . The second electrodes 42 are transparent electrodes.

[0085] A plurality of dams 50 are located between the first substrate 10 and the second substrate 20. The plurality of dams 50 are arranged corresponding to the plurality of first electrodes 40. The orthographic projections of the dams 50 on the first substrate 10 surround at least one side of the orthographic projection of the first electrode 41 on the first substrate 10.

[0086] The dam 50 has at least one gap 51 , and the display panel has a first state. In the first state, the transmittance of the area corresponding to the first electrode 41 is less than the transmittance of the area corresponding to the second electrode 42 .

[0087] It should be noted that in the embodiment of the present application, the electrophoretic particles 30 in the electrophoretic layer include black particles 31 and white particles 32, and the movement of the black particles 31 and the white particles 32 is controlled by the first electrode 41 and the second electrode 42, so that the display panel switches between different transparencies.

[0088] The display panel provided in the embodiment of the present application not only includes a first substrate 10, a second substrate 20, and an electrophoretic layer located between the first substrate 10 and the second substrate 20, but also includes a cofferdam 50 located between the first substrate 10 and the second substrate 20. The multiple cofferdams 50 are arranged corresponding to the multiple first electrodes 41 on the first substrate 10, and the orthographic projection of the cofferdam 50 on the first substrate 10 surrounds at least one side of the orthographic projection of the first electrode 41 on the first substrate 10. Therefore, when the display panel is in the first state, the first electrode 41 and the second electrode 42 are used to control the movement of the black particles 31 to the position of the first electrode 41 and the movement of the white particles 32 to the position of the second electrode 42, so that the transmittance of the area corresponding to the first electrode 41 is less than the transmittance of the area corresponding to the second electrode 42, and the cofferdam 50 is used to block the black particles 31 moving to the area corresponding to the first electrode 41, thereby reducing the probability of their diffusion from the area corresponding to the first electrode 41 to the area corresponding to the second electrode 42 due to the concentration gradient, thereby improving the stability of the display panel in maintaining the first state.

[0089] Optionally, in one embodiment of the present application, the first state of the display panel is a transparent state of the display panel, but the present application does not limit this. As long as the transmittance of the area corresponding to the first electrode is less than the transmittance of the area corresponding to the second electrode when the display panel is in the first state, it can be sufficient.

[0090] On the basis of any of the above embodiments, in one embodiment of the present application, the first electrode 41 may be a non-transparent electrode or a transparent electrode. It should be noted that when the first electrode 41 is a transparent electrode, the surface of the first electrode 41 is also covered with a functional layer, so that the area where the first electrode 41 is located is a non-light-transmitting area. Optionally, in one embodiment of the present application, the functional layer may be a color film layer, so that the functional layer on the surface of the first electrode 41 is used to reflect the ambient light at the first electrode 41, so that the area where the first electrode 41 is located is displayed in color; in another embodiment of the present application, the functional layer may also be a reflective layer, so that the functional layer on the surface of the first electrode 41 is used to reflect the ambient light at the first electrode 41, so as to improve the display brightness of the display panel when it is in a white state. In other embodiments of the present application, the functional layer may also be other functional layers, as long as the second electrode 42 is a transparent electrode and the area where the first electrode 41 is located is in a non-transparent state.

[0091] On the basis of any of the above embodiments, in one embodiment of the present application, the display panel further has a second state. In this embodiment, in the first state, the transmittance of the area corresponding to the first electrode 41 and the transmittance of the area corresponding to the second electrode 42 have a first difference. In the second state, the transmittance of the area corresponding to the first electrode 41 and the transmittance of the area corresponding to the second electrode 42 have a second difference. The second difference is smaller than the first difference, that is, the transparency of the display panel in the second state is smaller than the transparency of the display panel in the first state. For example, the first state of the display panel is a transparent state, and the second state of the display panel is a non-transparent state, such as a grayscale state, a black state, or a white state. The present application does not limit this, and it depends on the specific circumstances.

[0092] On the basis of any of the above embodiments, in one embodiment of the present application, as Figure 6 As shown, the dams 50 correspond one-to-one with the first electrodes 41, so that the black particles located in the corresponding areas of each first electrode 41 can be reduced in probability of diffusing to the corresponding areas of the second electrode 42 due to the concentration gradient by using the corresponding dams 50. Furthermore, the one-to-one correspondence between the dams 50 and the first electrodes 41 can confine the black particles in the corresponding areas of each first electrode 41 to the corresponding areas of the first electrode 41, further reducing the mobility of the black particles in the corresponding areas of the first electrode 41.

[0093] Based on the above embodiment, in one embodiment of the present application, continue as follows Figure 6 As shown, the orthographic projection of the dam 50 on the first substrate 10 surrounds the orthographic projection of the first electrode 41 on the first substrate 10, as shown in FIG. Figure 7-10 As shown, Figure 8 for Figure 7 Cross-sectional view along AA1, Figure 10 for Figure 9In the cross-sectional view along AA1, the dam 50 has the gap 51 in at least some areas close to the second substrate 20, so that the black particles in the corresponding areas of each first electrode 41 can be confined to the corresponding areas of each first electrode 41 by using the dam, further reducing the fluidity of the black particles located in the corresponding areas of the first electrode 41, and using the gap 51 to allow the black particles 31 and the white particles 32 to flow between the corresponding areas of the first electrode 41 and the corresponding areas of the second electrode 42 under the control of the first electrode 41 and the second electrode 42.

[0094] Specifically, when the state of the display panel is switched to the first state, the black particles 31 move to the top of the first electrode 41 through the gap 51 of the cofferdam 50 under the action of the electric field formed between the first electrode 41 and the second electrode 42, and gather in the area above the first electrode 41 close to the side of the first substrate 10 under the action of gravity. The cofferdam 50 is arranged around the first electrode 41, and the gap 51 of the cofferdam 50 is located on the side of the cofferdam 50 close to the second substrate 20, so that the black particles 31 gathered in the area of the first electrode 41 cannot diffuse to the corresponding area of the second electrode 42 due to the concentration gradient, thereby improving the stability of the display panel to maintain the first state.

[0095] Optionally, in one embodiment of the present application, Figure 7 and Figure 8 As shown, in the direction perpendicular to the plane where the first substrate 10 is located, the cofferdam 50 is a polygonal structure, and the cofferdam 50 has a gap 51 on at least one side of the polygon; in another embodiment of the present application, as shown Figure 9 and Figure 10 As shown, in the direction perpendicular to the plane where the first substrate 10 is located, the cofferdam 50 is a polygonal structure, and the cofferdam 50 has a notch 51 on at least one corner of the polygon. In other embodiments of the present application, the cofferdam 50 may also have a notch 51 on at least one side and at least one corner of the polygon. For example, the cofferdam 50 has the same height at all places, but there is a certain air gap between the cofferdam 50 and the second substrate 20 to form the notch of the cofferdam. The present application does not limit this, and it depends on the specific situation.

[0096] It should be noted that, in the above embodiment, compared with the notch 51 on at least one corner of the polygon corresponding to the cofferdam 50, the notch 51 on at least one side of the polygon corresponding to the cofferdam 50 allows the electrophoretic particles to move along a shorter path when the display panel switches between different states (for example, between the first state and the second state), thereby making the display panel switch between different states faster and improving the response speed of the display panel when switching between different states.

[0097] Specifically, in another embodiment of the present application, in order to further improve the response speed of the display panel switching between different states, when the dam 50 has a gap 51 on at least one side of the polygon, the dam 50 has a gap 51 on each side of the polygon located between the first electrode 41 and the second electrode 42, such as Figure 7 When the cofferdam 50 corresponds to at least one corner of the polygon having a gap 51, the cofferdam 50 corresponds to each corner of the polygon having a gap 51, as shown Figure 9 As shown, but this application does not limit this, and the specific circumstances will depend on the circumstances.

[0098] It should be noted that, based on the above embodiments, in one embodiment of the present application, the orthographic projection area of the first electrode 41 on the first substrate 10 is smaller than the orthographic projection area of the second electrode 42 on the first substrate 10, so as to make room for setting the cofferdam 50 by reducing the size of the first electrode on the first substrate, thereby adding the cofferdam 50 to the display panel without affecting the resolution of the display panel, but the present application does not limit this, and the specific situation depends on the circumstances.

[0099] Optionally, in one embodiment of the present application, the overall size of the projection area of the first electrode 41 and the dam 50 on the first substrate 10 is the same as the size of the projection area of the second electrode 42 on the first substrate 10, so that the dam 50 is set around the first electrode 41 without changing the size and layout of other structures outside the first electrode 41 in the display panel, but the present application does not limit this, and it depends on the specific situation.

[0100] On the basis of any embodiment of the present application, in one embodiment of the present application, when the cofferdam 50 corresponds to the first electrode 41 one by one, as shown in FIG. Figure 11 and Figure 12 As shown, the display panel includes a plurality of first repeating units 60 . The first repeating unit 60 includes n×n electrodes. The electrodes located at the four corners of the repeating unit 60 are first electrodes 41 , and the remaining electrodes are second electrodes 42 .

[0101] It should be noted that, in this embodiment, n can be any integer not less than 2. Taking n as 3 as an example, the first repeating unit in the display panel provided in the embodiment of the present application is illustrated below, but the present application does not limit this, and the specific situation depends on it.

[0102] It should also be noted that the above-mentioned embodiments are based on the example that the orthographic projection of the cofferdam 50 on the first substrate 10 surrounds the orthographic projection of the first electrode 41 on the first substrate 10, and the cofferdam 50 has the above-mentioned gap 51 in at least some areas close to the second substrate 20, to describe the display panel provided by the embodiments of the present application, but the present application is not limited to this. In other embodiments of the present application, the gap of the cofferdam 50 can also be set in at least one side direction of the first electrode 41 toward the second electrode 42 to increase the speed of the electrophoretic particles flowing between the corresponding area of the first electrode 41 and the corresponding area of the second electrode 42 when the display panel switches between different states.

[0103] Optionally, in one embodiment of the present application, continue as Figure 12 As shown, the display panel includes a plurality of first repeating units 60, and the first repeating unit 60 includes n×n electrodes. The electrodes located at the four corners of the repeating unit 60 are first electrodes 41, and the remaining electrodes are second electrodes 42. In a plane parallel to the first substrate 10, the notch direction of the cofferdam 50 exposes at least one side of the first electrode 41 to increase the speed of the electrophoretic particles flowing between the area corresponding to the first electrode 41 and the area corresponding to the second electrode 42 when the display panel switches between different states, and at least one second electrode 42 is provided in the direction of the notch 51 of the cofferdam 50 to utilize the cofferdam to prevent black particles from gathering in the area corresponding to the first electrode 41 and diffusing to the area corresponding to the second electrode 42 due to the gradient concentration along the non-notch direction of the cofferdam 50, thereby improving the stability of the display panel in maintaining the first state.

[0104] Based on the above embodiment, in one embodiment of the present application, Figure 12 As shown, parallel to the plane where the first substrate 10 is located, the notch direction of the cofferdam 50 exposes one side of the first electrode 41, and at least one second electrode 42 is provided in the notch 51 direction of the cofferdam 50, so as to utilize the cofferdam to prevent black particles from gathering in the corresponding area of the first electrode 41 and diffusing to the corresponding area of the second electrode 42 along the non-notch direction of the cofferdam 50 due to the gradient concentration, thereby further reducing the probability of black particles gathering in the corresponding area of the first electrode 41 and diffusing to the corresponding area of the second electrode 42 due to the gradient concentration.

[0105] Optionally, in one embodiment of the present application, continue as Figure 12 As shown, the side of the dam 50 that exposes the first electrode 41 in the direction of the notch is not provided with a side edge. For example, the orthographic projection of the dam 50 on the first substrate 10 is a U-shaped structure, with the notch 51 facing the second electrode 42, so as to reduce the probability of the black particles in the electrophoretic particles diffusing from the area corresponding to the first electrode 41 to the area corresponding to the second electrode 42 due to the concentration gradient through the U-shaped structure. In other embodiments of the present application, the side of the dam 50 that exposes the first electrode 41 in the direction of the notch may also be provided with a partial side edge, such as Figure 13 As shown, this application does not limit this and the specific circumstances will depend on the specific situation.

[0106] The following describes a case where the orthographic projection of the dam 50 on the first substrate 10 is a U-shaped structure and the gap of the dam 50 exposes one side of the first electrode 41 in a plane parallel to the first substrate 10 , taking the case where the orthographic projection of the dam 50 on the first substrate 10 is a U-shaped structure as an example.

[0107] Optionally, in one embodiment of the present application, the gap of the cofferdam corresponding to the first electrode in the first row and first column of the first repeating unit faces the first direction (right) or the second direction (downward);

[0108] The gap of the cofferdam corresponding to the first electrode in the first row and the nth column of the first repeating unit faces the third direction (left) or the second direction (downward);

[0109] The gap of the cofferdam corresponding to the first electrode located in the nth row and the first column of the first repeating unit faces the first direction (right) or the fourth direction (upward);

[0110] The gap of the cofferdam corresponding to the first electrode located in the nth row and the nth column of the first repeating unit faces the third direction (left) or the fourth direction (upward);

[0111] Among them, the first direction and the third direction are row directions, the first direction is the direction of the i-th column electrode among the multiple first electrodes pointing to the i+1-th column electrode, and the third direction is the direction of the i+1-th column electrode pointing to the i-th column electrode, such as the first direction points to the right, and the third direction points to the left; the second direction and the fourth direction are column directions, the second direction is the direction of the i-th row electrode among the multiple first electrodes pointing to the i+1-th row electrode, and the fourth direction is the direction of the i+1-th row electrode pointing to the i-th row electrode, such as the second direction points downward, and the fourth direction points upward; i is an arbitrary positive integer.

[0112] Specifically, in one embodiment of the present application, Figure 12 and Figure 14 As shown, Figure 14 for Figure 12 Schematic diagram of a projection of a structure 70 consisting of four adjacent dams 50 and their corresponding first electrodes 41 in the row and column directions on the first substrate 10. In this embodiment, in the first repeating unit 60, the gaps of the dams 50 corresponding to the first electrodes 41 in the first row and first column of the first repeating unit 60 face the second direction Y-;

[0113] The gap of the cofferdam 50 corresponding to the first electrode 41 in the first row and the nth column in the first repeating unit 60 faces the third direction X-;

[0114] The gap of the cofferdam 50 corresponding to the first electrode 41 in the nth row and the first column of the first repeating unit 60 faces the first direction X+;

[0115] The gap of the dam 50 corresponding to the first electrode 41 located in the n-th row and the n-th column of the first repeating unit 60 faces the fourth direction Y+.

[0116] In another embodiment of the present application, Figure 15 and Figure 16 As shown, Figure 16 for Figure 15 Schematic diagram of a projection of a structure 70 consisting of four adjacent dams 50 and their corresponding first electrodes 41 in the row and column directions on the first substrate 10. In this embodiment, in the first repeating unit 60, the gaps of the dams 50 corresponding to the first electrodes 41 in the first row and first column of the first repeating unit 60 face the second direction Y-;

[0117] The gap of the cofferdam 50 corresponding to the first electrode 41 in the first row and the nth column in the first repeating unit 60 faces the second direction Y−;

[0118] The gap of the cofferdam 50 corresponding to the first electrode 41 in the nth row and the first column of the first repeating unit 60 faces the first direction X+;

[0119] The gap of the dam 50 corresponding to the first electrode 41 located in the n-th row and the n-th column of the first repeating unit 60 faces the fourth direction Y+.

[0120] In another embodiment of the present application, Figure 17 and Figure 18 As shown, Figure 18 for Figure 17 Schematic diagram of a projection of a structure 70 composed of four adjacent dams 50 and their corresponding first electrodes 41 in the row and column directions on the first substrate 10. In this embodiment, in the first repeating unit 60, the gaps of the dams 50 corresponding to the first electrodes 41 located in the first row and first column of the first repeating unit 60 face the first direction X+;

[0121] The gap of the cofferdam 50 corresponding to the first electrode 41 in the first row and the nth column in the first repeating unit 60 faces the third direction X-;

[0122] The gap of the cofferdam 50 corresponding to the first electrode 41 in the nth row and the first column of the first repeating unit 60 faces the first direction X+;

[0123] The gap of the dam 50 corresponding to the first electrode 41 located in the n-th row and the n-th column of the first repeating unit 60 faces the fourth direction Y+.

[0124] In another embodiment of the present application, Figure 19 and Figure 20 As shown, Figure 20 for Figure 19Schematic diagram of a projection of a structure 70 composed of four adjacent dams 50 and their corresponding first electrodes 41 in the row and column directions on the first substrate 10. In this embodiment, in the first repeating unit 60, the gaps of the dams 50 corresponding to the first electrodes 41 located in the first row and first column of the first repeating unit 60 face the first direction X+;

[0125] The gap of the cofferdam 50 corresponding to the first electrode 41 in the first row and the nth column in the first repeating unit 60 faces the second direction Y−;

[0126] The gap of the cofferdam 50 corresponding to the first electrode 41 in the nth row and the first column of the first repeating unit 60 faces the first direction X+;

[0127] The gap of the dam 50 corresponding to the first electrode 41 located in the n-th row and the n-th column of the first repeating unit 60 faces the fourth direction Y+.

[0128] In another embodiment of the present application, Figure 21 and Figure 22 As shown, Figure 22 for Figure 21 Schematic diagram of a projection of a structure 70 consisting of four adjacent dams 50 and their corresponding first electrodes 41 in the row and column directions on the first substrate 10. In this embodiment, in the first repeating unit 60, the gaps of the dams 50 corresponding to the first electrodes 41 in the first row and first column of the first repeating unit 60 face the second direction Y-;

[0129] The gap of the cofferdam 50 corresponding to the first electrode 41 in the first row and the nth column in the first repeating unit 60 faces the third direction X-;

[0130] The gap of the cofferdam 50 corresponding to the first electrode 41 in the nth row and the first column of the first repeating unit 60 faces the fourth direction Y+;

[0131] The gap of the dam 50 corresponding to the first electrode 41 located in the n-th row and the n-th column of the first repeating unit 60 faces the fourth direction Y+.

[0132] In another embodiment of the present application, Figure 23 and Figure 24 As shown, Figure 24 for Figure 23 Schematic diagram of a projection of a structure 70 consisting of four adjacent dams 50 and their corresponding first electrodes 41 in the row and column directions on the first substrate 10. In this embodiment, in the first repeating unit 60, the gaps of the dams 50 corresponding to the first electrodes 41 in the first row and first column of the first repeating unit 60 face the second direction Y-;

[0133] The gap of the cofferdam 50 corresponding to the first electrode 41 in the first row and the nth column in the first repeating unit 60 faces the second direction Y−;

[0134] The gap of the cofferdam 50 corresponding to the first electrode 41 in the nth row and the first column of the first repeating unit 60 faces the fourth direction Y+;

[0135] The gap of the dam 50 corresponding to the first electrode 41 located in the n-th row and the n-th column of the first repeating unit 60 faces the fourth direction Y+.

[0136] In another embodiment of the present application, Figure 25 and Figure 26 As shown, Figure 26 for Figure 25 Schematic diagram of a projection of a structure 70 composed of four adjacent dams 50 and their corresponding first electrodes 41 in the row and column directions on the first substrate 10. In this embodiment, in the first repeating unit 60, the gaps of the dams 50 corresponding to the first electrodes 41 located in the first row and first column of the first repeating unit 60 face the first direction X+;

[0137] The gap of the cofferdam 50 corresponding to the first electrode 41 in the first row and the nth column in the first repeating unit 60 faces the third direction X-;

[0138] The gap of the cofferdam 50 corresponding to the first electrode 41 in the nth row and the first column of the first repeating unit 60 faces the fourth direction Y+;

[0139] The gap of the dam 50 corresponding to the first electrode 41 located in the n-th row and the n-th column of the first repeating unit 60 faces the fourth direction Y+.

[0140] In another embodiment of the present application, Figure 27 and Figure 28 As shown, Figure 28 for Figure 27 Schematic diagram of a projection of a structure 70 composed of four adjacent dams 50 and their corresponding first electrodes 41 in the row and column directions on the first substrate 10. In this embodiment, in the first repeating unit 60, the gaps of the dams 50 corresponding to the first electrodes 41 located in the first row and first column of the first repeating unit 60 face the first direction X+;

[0141] The gap of the cofferdam 50 corresponding to the first electrode 41 in the first row and the nth column in the first repeating unit 60 faces the second direction Y−;

[0142] The gap of the cofferdam 50 corresponding to the first electrode 41 in the nth row and the first column of the first repeating unit 60 faces the fourth direction Y+;

[0143] The gap of the dam 50 corresponding to the first electrode 41 located in the n-th row and the n-th column of the first repeating unit 60 faces the fourth direction Y+.

[0144] In another embodiment of the present application, Figure 29 and Figure 30 As shown, Figure 30 for Figure 29 Schematic diagram of a projection of a structure 70 consisting of four adjacent dams 50 and their corresponding first electrodes 41 in the row and column directions on the first substrate 10. In this embodiment, in the first repeating unit 60, the gaps of the dams 50 corresponding to the first electrodes 41 in the first row and first column of the first repeating unit 60 face the second direction Y-;

[0145] The gap of the cofferdam 50 corresponding to the first electrode 41 in the first row and the nth column in the first repeating unit 60 faces the third direction X-;

[0146] The gap of the cofferdam 50 corresponding to the first electrode 41 in the nth row and the first column of the first repeating unit 60 faces the first direction X+;

[0147] The gap of the cofferdam 50 corresponding to the first electrode 41 located in the n-th row and the n-th column of the first repeating unit 60 faces the third direction X-.

[0148] In another embodiment of the present application, Figure 31 and Figure 32 As shown, Figure 32 for Figure 31 Schematic diagram of a projection of a structure 70 consisting of four adjacent dams 50 and their corresponding first electrodes 41 in the row and column directions on the first substrate 10. In this embodiment, in the first repeating unit 60, the gaps of the dams 50 corresponding to the first electrodes 41 in the first row and first column of the first repeating unit 60 face the second direction Y-;

[0149] The gap of the cofferdam 50 corresponding to the first electrode 41 in the first row and the nth column in the first repeating unit 60 faces the second direction Y−;

[0150] The gap of the cofferdam 50 corresponding to the first electrode 41 in the nth row and the first column of the first repeating unit 60 faces the first direction X+;

[0151] The gap of the cofferdam 50 corresponding to the first electrode 41 located in the n-th row and the n-th column of the first repeating unit 60 faces the third direction X-.

[0152] In another embodiment of the present application, Figure 33 and Figure 34 As shown, Figure 34 for Figure 33Schematic diagram of a projection of a structure 70 composed of four adjacent dams 50 and their corresponding first electrodes 41 in the row and column directions on the first substrate 10. In this embodiment, in the first repeating unit 60, the gaps of the dams 50 corresponding to the first electrodes 41 located in the first row and first column of the first repeating unit 60 face the first direction X+;

[0153] The gap of the cofferdam 50 corresponding to the first electrode 41 in the first row and the nth column in the first repeating unit 60 faces the third direction X-;

[0154] The gap of the cofferdam 50 corresponding to the first electrode 41 in the nth row and the first column of the first repeating unit 60 faces the first direction X+;

[0155] The gap of the cofferdam 50 corresponding to the first electrode 41 located in the n-th row and the n-th column of the first repeating unit 60 faces the third direction X-.

[0156] In another embodiment of the present application, Figure 35 and Figure 36 As shown, Figure 36 for Figure 35 Schematic diagram of a projection of a structure 70 composed of four adjacent dams 50 and their corresponding first electrodes 41 in the row and column directions on the first substrate 10. In this embodiment, in the first repeating unit 60, the gaps of the dams 50 corresponding to the first electrodes 41 located in the first row and first column of the first repeating unit 60 face the first direction X+;

[0157] The gap of the cofferdam 50 corresponding to the first electrode 41 in the first row and the nth column in the first repeating unit 60 faces the second direction Y−;

[0158] The gap of the cofferdam 50 corresponding to the first electrode 41 in the nth row and the first column of the first repeating unit 60 faces the first direction X+;

[0159] The gap of the cofferdam 50 corresponding to the first electrode 41 located in the n-th row and the n-th column of the first repeating unit 60 faces the third direction X-.

[0160] In another embodiment of the present application, Figure 37 and Figure 38 As shown, Figure 38 for Figure 37 Schematic diagram of a projection of a structure 70 consisting of four adjacent dams 50 and their corresponding first electrodes 41 in the row and column directions on the first substrate 10. In this embodiment, in the first repeating unit 60, the gaps of the dams 50 corresponding to the first electrodes 41 in the first row and first column of the first repeating unit 60 face the second direction Y-;

[0161] The gap of the cofferdam 50 corresponding to the first electrode 41 in the first row and the nth column in the first repeating unit 60 faces the third direction X-;

[0162] The gap of the cofferdam 50 corresponding to the first electrode 41 in the nth row and the first column of the first repeating unit 60 faces the fourth direction Y+;

[0163] The gap of the cofferdam 50 corresponding to the first electrode 41 located in the n-th row and the n-th column of the first repeating unit 60 faces the third direction X-.

[0164] In another embodiment of the present application, Figure 39 and Figure 40 As shown, Figure 40 for Figure 39 Schematic diagram of a projection of a structure 70 consisting of four adjacent dams 50 and their corresponding first electrodes 41 in the row and column directions on the first substrate 10. In this embodiment, in the first repeating unit 60, the gaps of the dams 50 corresponding to the first electrodes 41 in the first row and first column of the first repeating unit 60 face the second direction Y-;

[0165] The gap of the cofferdam 50 corresponding to the first electrode 41 in the first row and the nth column in the first repeating unit 60 faces the second direction Y−;

[0166] The gap of the cofferdam 50 corresponding to the first electrode 41 in the nth row and the first column of the first repeating unit 60 faces the fourth direction Y+;

[0167] The gap of the cofferdam 50 corresponding to the first electrode 41 located in the n-th row and the n-th column of the first repeating unit 60 faces the third direction X-.

[0168] In another embodiment of the present application, Figure 41 and Figure 42 As shown, Figure 42 for Figure 41 Schematic diagram of a projection of a structure 70 composed of four adjacent dams 50 and their corresponding first electrodes 41 in the row and column directions on the first substrate 10. In this embodiment, in the first repeating unit 60, the gaps of the dams 50 corresponding to the first electrodes 41 located in the first row and first column of the first repeating unit 60 face the first direction X+;

[0169] The gap of the cofferdam 50 corresponding to the first electrode 41 in the first row and the nth column in the first repeating unit 60 faces the third direction X-;

[0170] The gap of the cofferdam 50 corresponding to the first electrode 41 in the nth row and the first column of the first repeating unit 60 faces the fourth direction Y+;

[0171] The gap of the cofferdam 50 corresponding to the first electrode 41 located in the n-th row and the n-th column of the first repeating unit 60 faces the third direction X-.

[0172] In another embodiment of the present application, Figure 43 and Figure 44 As shown, Figure 44 for Figure 43 Schematic diagram of a projection of a structure 70 composed of four adjacent dams 50 and their corresponding first electrodes 41 in the row and column directions on the first substrate 10. In this embodiment, in the first repeating unit 60, the gaps of the dams 50 corresponding to the first electrodes 41 located in the first row and first column of the first repeating unit 60 face the first direction X+;

[0173] The gap of the cofferdam 50 corresponding to the first electrode 41 in the first row and the nth column in the first repeating unit 60 faces the second direction Y−;

[0174] The gap of the cofferdam 50 corresponding to the first electrode 41 in the nth row and the first column of the first repeating unit 60 faces the fourth direction Y+;

[0175] The gap of the cofferdam 50 corresponding to the first electrode 41 located in the n-th row and the n-th column of the first repeating unit 60 faces the third direction X-.

[0176] like Figure 45 As shown, Figure 45 Shown Figure 41 Cross-sectional view along BB1 direction, from Figure 45 It can be seen that the present application is Harry, and the cofferdam 50 adopts a U-shaped structure, which can block the diffusion of black particles from three directions, thereby improving the stability of the display panel to maintain the first state.

[0177] It should be noted that the above embodiments all describe the display panel provided by the embodiments of the present application by taking the example that the gap of the cofferdam 50 exposes one side of the first electrode 41 in the direction parallel to the plane of the first substrate 10, but the present application is not limited to this. In other embodiments of the present application, in the direction parallel to the plane of the first substrate 10, the gap of the cofferdam 50 can also expose two sides or three sides of the first electrode 41, depending on the specific circumstances.

[0178] The following describes a situation in which the gaps of the dam 50 expose both sides of the first electrode 41 in a direction parallel to the plane of the first substrate 10 .

[0179] Optionally, in one embodiment of the present application, Figure 46As shown, in the direction perpendicular to the plane where the first substrate 10 is located, the cofferdam 50 is an L-shaped structure, and the orthographic projection of the cofferdam 50 on the first substrate 10 surrounds the two adjacent sides of the orthographic projection of the first electrode 41 on the first substrate 10, so as to block the black particles gathered in the corresponding area of the first electrode 41 from diffusing to the area where the second electrode 42 is located due to the concentration gradient from both sides of the first electrode 41, thereby improving the stability of the display panel in maintaining the first state.

[0180] Optionally, in one embodiment of the present application, continue as Figure 46 As shown, in the first repeating unit 60, the gaps of each cofferdam 50 face the interior of the first repeating unit 60, allowing the black particles and white particles in each first repeating unit 60 to move within the first repeating unit 60. This reduces the resistance to movement of the electrophoretic particles in different areas of each first repeating unit 60, and also reduces the probability of electrophoretic particles in different first repeating units 60 moving between different first repeating units 60, thereby improving the stability of the display panel in maintaining the first state. However, this application is not limited to this, and the specific application will depend on the specific situation.

[0181] It should be noted that the above embodiments describe the display panel by taking the display panel including multiple first repeating units as an example. In other embodiments of the present application, the display panel may also include multiple second repeating units, depending on the specific situation.

[0182] Optionally, in one embodiment of the present application, Figure 47 As shown, the display panel includes a plurality of second repeating units 80, each of which includes three adjacent electrodes located in the same row. The second repeating unit 80 includes two first electrodes 41 and one second electrode 42, and the second electrode 42 is located between the two first electrodes 41. In this embodiment, in a direction perpendicular to the plane of the first substrate 10, the gap 51 of the dam 50 is located on the side of the first electrode 41 facing the second electrode 42, so that the electrophoretic particles in the area where the first electrode 41 and the area where the second electrode 42 are located can move between the area where the first electrode 41 and the area where the second electrode 42 are located under the control of the first electrode 41 and the second electrode 42. When the display panel is in the first state, the dam is used to block the black particles accumulated in the area where the first electrode 41 is located from at least one side of the first electrode 41, thereby reducing the probability of the black particles accumulated in the area where the first electrode 41 being diffused to the area where the second electrode 42 due to the concentration gradient, thereby improving the stability of the display panel in maintaining the first state.

[0183] Based on the above embodiments, in one embodiment of the present application, Figure 48As shown, the gap direction of the cofferdam 50 corresponding to the first electrode 41 in the same column of the multiple electrodes is the same, so as to reduce the resistance of the electrophoretic particles located in the corresponding area of the second electrode 42 to move between different second repeating units 80, thereby improving the response speed of the display panel switching between different states; in another embodiment of the present application, Figure 47 As shown, the gaps of the dams 50 corresponding to the first electrodes 41 in the same column among the multiple electrodes are in opposite directions to increase the resistance of the black particles moving to the corresponding area of the second electrode 42 between different second repeating units 80, but this application does not limit this and it depends on the specific situation.

[0184] Optionally, based on the above embodiment, in one embodiment of the present application, as Figure 49 and Figure 50 As shown, the display panel further includes: at least one row of second electrodes 42 located between adjacent rows of second repeating units 80, so as to increase the proportion of the second electrodes 42 in the display panel and improve the transparency of the display panel when in a transparent state.

[0185] In another embodiment of the present application, the display panel includes a plurality of second repeating units 80, each of which includes three adjacent electrodes located in the same row. The second repeating unit 80 includes two first electrodes 41 and one second electrode 42, with the second electrode 42 located between the two first electrodes 41. At least one row of second electrodes 42 is disposed between adjacent rows of second repeating units 80. In this embodiment, in a direction perpendicular to the plane of the first substrate 10, the gap 51 of the dam 50 is located on the side of the first electrode 41 facing the second electrode 42, so that electrophoretic particles in the region of the first electrode 41 and the region of the second electrode 42 can move between the region of the first electrode 41 and the region of the second electrode 42 under the control of the first electrode 41 and the second electrode 42. When the display panel is in a first state, the dam is used to block black particles accumulated in the region of the first electrode 41 from at least one side of the first electrode 41, thereby reducing the probability of black particles accumulated in the region of the first electrode 41 diffusing to the region of the second electrode 42 due to a concentration gradient, thereby improving the stability of the display panel in maintaining the first state. At least one row of second electrodes 42 is disposed between adjacent rows of second repeating units 80 to increase the proportion of the second electrodes 42 in the display panel and improve the transparency of the display panel in a transparent state.

[0186] It should be noted that, in this embodiment, in the direction perpendicular to the plane of the first substrate 10, the second electrode 42 toward which the notch 51 of the cofferdam 50 points can be the second electrode 42 located in the same second repeating unit 80 as the cofferdam 50, or the second electrode 42 in other second repeating units 80, or the second electrode 42 located between adjacent rows of second repeating units. This application does not impose any restrictions on this, and the specific situation depends on the circumstances.

[0187] Optionally, in one embodiment of the present application, Figure 49 and Figure 50 As shown, the second repeating unit 80 includes a first first electrode 41 and a second first electrode 42 arranged along the row direction, and the gap direction of the cofferdam 50 corresponding to the first first electrode 41 and the gap direction of the cofferdam 50 corresponding to the second first electrode 42 are both in the row direction; in another embodiment of the present application, as shown Figure 51 and Figure 52 As shown, the second repeating unit 80 includes a first first electrode 41 and a second first electrode 42 arranged along the row direction. The gap direction of the cofferdam 50 corresponding to the first first electrode 41 and the gap direction of the cofferdam 50 corresponding to the second first electrode 42 are both in the column direction, which can be the fourth direction Y-, as shown in FIG. Figure 51 As shown, they can also be in the second direction Y+, such as Figure 52 As shown, the gap direction of the cofferdam 50 corresponding to the first first electrode 42 can also be the second direction Y-, and the gap direction of the cofferdam 50 corresponding to the second first electrode 42 can be the fourth direction Y+, as shown in FIG. Figure 53 Alternatively, the gap direction of the cofferdam 50 corresponding to the first first electrode 42 is the fourth direction Y+, and the gap direction of the cofferdam 50 corresponding to the second first electrode 42 is the second direction Y-, as shown in FIG. Figure 54 As shown, this application does not limit this and the specific circumstances will depend on the specific situation.

[0188] In another embodiment of the present application, Figures 55-58 As shown, the second repeating unit 80 includes a first first electrode 41 and a second first electrode 42 arranged along the row direction. The gap direction of the cofferdam 50 corresponding to the first first electrode 41 and the gap direction of the cofferdam 50 corresponding to the second first electrode 42 can also be one in the row direction and the other in the column direction.

[0189] Specifically, in one embodiment of the present application, Figure 55 As shown, the gap direction of the cofferdam 50 corresponding to the first first electrode 42 in the second repeating unit 80 is the second direction Y-, and the gap direction of the cofferdam 50 corresponding to the second first electrode 42 is the third direction X-; in another embodiment of the present application, as shown Figure 56As shown, the gap direction of the cofferdam 50 corresponding to the first first electrode 42 in the second repeating unit 80 is the fourth direction Y+, and the gap direction of the cofferdam 50 corresponding to the second first electrode 42 is the third direction X-; in another embodiment of the present application, as shown Figure 57 As shown, the gap direction of the cofferdam 50 corresponding to the first first electrode 42 in the second repeating unit 80 is the first direction X+, and the gap direction of the cofferdam 50 corresponding to the second first electrode 42 is the fourth direction Y+; in another embodiment of the present application, as shown Figure 58 As shown, the gap direction of the cofferdam 50 corresponding to the first first electrode 42 in the second repeating unit 80 is the first direction X+, and the gap direction of the cofferdam 50 corresponding to the second first electrode 42 is the second direction Y-. This application does not limit this, and it depends on the specific situation.

[0190] In another embodiment of the present application, Figure 59 and Figure 60 As shown, Figure 60 for Figure 59 In the cross-sectional view along CC1, the multiple electrodes include a first electrode 41 and a second electrode 42 arranged in an interlaced manner perpendicular to the extension direction of the first electrode 41. The first electrode 41 includes a first portion 411, a second portion 412 and a third portion 413 arranged along its extension direction. One first electrode 41 corresponds to two cofferdams 50, one cofferdam 50 is arranged on the side of the first portion 411 away from the third portion 412, and its notch is directed toward the first portion 411, and the other cofferdam 50 is arranged on the side of the third portion 413 away from the first portion 411, and its notch is directed toward the third portion 413, so as to utilize the two cofferdams 50 to block the black particles gathered in the corresponding area of the first electrode 41, thereby alleviating the phenomenon that the black particles gathered in the corresponding area of the first electrode 41 diffuse to the area where the second electrode 42 is located due to the concentration gradient.

[0191] Optionally, in one embodiment of the present application, continue as Figure 60 As shown, in the direction perpendicular to the plane of the first substrate 10, the height of the second part 412 is different from the heights of the first part 411 and the third part 413, so that after the first electrode 41 and the second electrode 42 are powered off, the electric field strength E2 of the area corresponding to the second part 412 is different from the electric field strength E1 of the area corresponding to the first part 411 and the third part 413, thereby confining the black particles gathered in the area corresponding to the first electrode 41 in the cofferdam 50.

[0192] It should be noted that, in this embodiment, when the display panel switches to the first state, the first electrode 41 and the second electrode 42 are first used to control the black particles in the electrophoretic particles to move to the corresponding area of the first electrode 41, and then the first electrode 41 and the second electrode 42 are powered off. The different heights of the first part 411, the second part 412 and the third part 413 in the first electrode 41 are used to redistribute the charge in the area where the first electrode 41 is located, so that the black particles moved to the corresponding area of the first electrode 41 continue to move into the cofferdam 50, so that the cofferdam 50 is used to block the black particles, thereby reducing the probability of black particles diffusing to the corresponding area of the second electrode 42 due to different concentration gradients, and improving the stability of the display panel in the first state.

[0193] Optionally, in one embodiment of the present application, continue as Figure 60 As shown, the height of the second portion 412 is less than the height of the first portion 411 and the third portion 413, so that in the direction perpendicular to the first substrate 10, the cross-sectional view of the first electrode 41 is concave, but the present application is not limited to this. In other embodiments of the present application, the height of the second portion 412 may also be greater than the height of the first portion 411 and the third portion 413, so that in the direction perpendicular to the first substrate 10, the cross-sectional view of the first electrode 41 is convex, as shown in FIG. Figure 61 As shown, subject to availability.

[0194] Based on any of the above embodiments, in one embodiment of the present application, the first substrate 10 includes a drive circuit that provides a voltage signal to the first electrode 41 and the second electrode 42. The drive circuit is used to control the voltage on the first electrode 41 and the second electrode 42, thereby controlling the movement of the electrophoretic particles. Optionally, the drive circuit can be located in the area corresponding to the first electrode 41, or in the area corresponding to the cofferdam 42, or partially in the area corresponding to the first electrode 41 and partially in the area corresponding to the cofferdam 42. This application does not impose any restrictions on this, as long as it does not affect the transparent display of the display panel.

[0195] Correspondingly, such as Figure 62 As shown, an embodiment of the present application further provides a display device, which includes the display panel provided by any of the above embodiments. Since the content of the display panel has been described in detail in the above embodiments, it will not be repeated here.

[0196] Optionally, in one embodiment of the present application, the display device can be a mobile phone, a tablet computer, a wearable device, an in-vehicle device, an augmented reality (AR) / virtual reality (VR) device, a laptop computer, an ultra-mobile personal computer (UMPC), a netbook, a personal digital assistant (PDA), etc., and the embodiment of the present application does not impose any restrictions on this.

[0197] In summary, the display panel and the display device including the display panel provided in the embodiments of the present application not only include a first substrate 10, a second substrate 20, and an electrophoretic layer located between the first substrate 10 and the second substrate 20, but also include a dam 50 located between the first substrate 10 and the second substrate 20. The multiple dams 50 are arranged corresponding to the multiple first electrodes 41 on the first substrate 10, and the orthographic projection of the dam 50 on the first substrate 10 at least surrounds one side of the orthographic projection of the first electrode 41 on the first substrate 10. Therefore, when the display panel is in the first state, the first electrode 41 and the second electrode 42 are used to control the movement of the black particles 31 to the position of the first electrode 41 and the movement of the white particles 32 to the position of the second electrode 42, so that the transmittance of the area corresponding to the first electrode 41 is less than the transmittance of the area corresponding to the second electrode 42, and the dam 50 is used to block the black particles 31 moving to the area corresponding to the first electrode 41, thereby reducing the probability of their diffusion from the area corresponding to the first electrode 41 to the area corresponding to the second electrode 42 due to the concentration gradient, thereby improving the stability of the display panel in maintaining the first state.

[0198] The various embodiments in this specification are described in a progressive, parallel, or combined manner. Each embodiment focuses on the differences from other embodiments, and reference can be made to the common and similar parts between the various embodiments. For the devices disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple. For relevant parts, refer to the description of the methods.

[0199] It should be noted that, in the description of the present application, it should be understood that the description of the drawings and embodiments is illustrative rather than restrictive. It should also be noted that, in this article, relational terms such as first and second, etc. are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that the article or equipment comprising a series of elements includes not only those elements, but also includes other elements that are not clearly listed, or also includes elements that are inherent to such article or equipment. In the absence of more restrictions, the elements limited by the statement "comprise one..." do not exclude the presence of other identical elements in the article or equipment comprising the above elements.

[0200] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present application. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A display panel, characterized in that: include: a first substrate and a second substrate arranged opposite to each other; an electrophoretic layer located between the first substrate and the second substrate, the electrophoretic layer comprising a dielectric layer and electrophoretic particles located in the dielectric layer; a plurality of electrodes located on a side of the first substrate facing the second substrate, the plurality of electrodes including a plurality of first electrodes and a plurality of second electrodes, the second electrodes being transparent electrodes; a plurality of dams located between the first substrate and the second substrate, the plurality of dams being arranged corresponding to the plurality of first electrodes, and the orthographic projections of the dams on the first substrate surrounding at least one side of the orthographic projection of the first electrode on the first substrate; The dam has at least one gap, and the display panel has a first state. In the first state, the transmittance of the area corresponding to the first electrode is less than the transmittance of the area corresponding to the second electrode.

2. The display panel according to claim 1, wherein: The display panel further has a second state, in which, in the first state, the light transmittance of the area corresponding to the first electrode and the light transmittance of the area corresponding to the second electrode have a first difference; in the second state, the light transmittance of the area corresponding to the first electrode and the light transmittance of the area corresponding to the second electrode have a second difference; The second difference is smaller than the first difference.

3. The display panel according to claim 1, wherein: The cofferdams correspond to the first electrodes one by one.

4. The display panel according to claim 3, wherein: The orthographic projection of the dam on the first substrate surrounds the orthographic projection of the first electrode on the first substrate, and at least a portion of a side of the dam close to the second substrate has the gap.

5. The display panel according to claim 4, wherein: In a direction perpendicular to the plane where the first substrate is located, the cofferdam is a polygonal structure, and the cofferdam has the notch on at least one side corresponding to the polygon.

6. The display panel according to claim 4, wherein: In a direction perpendicular to the plane where the first substrate is located, the cofferdam is a polygonal structure, and the cofferdam has the notch on at least one corner corresponding to the polygon.

7. The display panel according to claim 3, wherein: The display panel includes multiple first repeating units, each of which includes n×n electrodes. The electrodes located at the four corners of the repeating unit are the first electrodes, and the remaining electrodes are the second electrodes. In a plane parallel to the first substrate, the gap direction of the cofferdam exposes at least one side of the first electrode, and at least one second electrode is provided in the gap direction of the cofferdam.

8. The display panel according to claim 7, wherein: The gap of the cofferdam corresponding to the first electrode in the first row and first column of the first repeating unit faces the first direction or the second direction; The gap of the cofferdam corresponding to the first electrode in the first row and the nth column of the first repeating unit faces the third direction or the second direction; The gap of the cofferdam corresponding to the first electrode located in the nth row and the first column of the first repeating unit faces the first direction or the fourth direction; The gap of the cofferdam corresponding to the first electrode located in the nth row and the nth column of the first repeating unit faces the third direction or the fourth direction; The first direction and the third direction are row directions, the first direction is from the i-th column electrode to the i+1-th column electrode among the plurality of first electrodes, and the third direction is from the i+1-th column electrode to the i-th column electrode; The second direction and the fourth direction are column directions. The second direction is from the i-th row electrode to the i+1-th row electrode in the plurality of first electrodes. The fourth direction is from the i+1-th row electrode to the i-th row electrode. i is any positive integer.

9. The display panel according to claim 7, wherein: In a direction perpendicular to the plane where the first substrate is located, the cofferdam is an L-shaped structure, and the orthographic projection of the cofferdam on the first substrate surrounds two adjacent sides of the orthographic projection of the first electrode on the first substrate.

10. The display panel according to claim 9, wherein: In the first repeating unit, the gap of each cofferdam faces the interior of the first repeating unit.

11. The display panel according to claim 3, wherein The display panel includes a plurality of second repeating units, each of the second repeating units includes three electrodes located in the same row and adjacent to each other, and the second repeating unit includes two first electrodes and one second electrode, wherein the second electrode is located between the two first electrodes; In a direction perpendicular to the plane where the first substrate is located, the gap of the cofferdam is located on a side of the first electrode facing the second electrode.

12. The display panel according to claim 11, wherein: The gap directions of the cofferdams corresponding to the first electrodes in the same column among the plurality of electrodes are the same.

13. The display panel according to claim 11, wherein: The gaps of the dams corresponding to the first electrodes in the same row of the plurality of electrodes are in opposite directions.

14. The display panel according to claim 12 or 13, wherein: The display panel further includes at least one row of second electrodes located between adjacent rows of second repeating units.

15. The display panel according to claim 1, wherein The multiple electrodes include first electrodes and second electrodes arranged alternately along an extension direction perpendicular to the first electrode, the first electrode includes a first part, a second part and a third part arranged along its extension direction, one first electrode corresponds to two cofferdams, one cofferdam is set on the side of the first part away from the third part, and its notch direction is toward the first part, and the other cofferdam is set on the side of the third part away from the first part, and its notch direction is toward the third part.

16. The display panel according to claim 15, wherein: In a direction perpendicular to the plane where the first substrate is located, the height of the second portion is different from the heights of the first portion and the third portion.

17. The display panel according to claim 16, wherein: The second portion has a height greater than that of the first portion and the third portion.

18. The display panel according to claim 16, wherein: The second portion has a height smaller than that of the first portion and the third portion.

19. A display device, characterized in that: The display panel comprises the display panel according to any one of claims 1 to 18.

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