Display device

Abstract

The invention discloses a display device. The display device comprises a first substrate, a second substrate and an electrophoresis layer, wherein the first substrate and the second substrate are oppositely arranged; the electrophoresis layer is arranged between the first substrate and the second substrate; a rough dielectric layer is arranged on one side, close to the electrophoresis layer, of the first substrate, the rough dielectric layer is made of a lyophilic material, and the surface of one side, close to the electrophoresis layer, of the rough dielectric layer is in contact with the electrophoresis layer; the roughness of the surface of one side, close to the electrophoresis layer, of the rough dielectric layer is greater than that of the surface of one side, close to the electrophoresis layer, of the first substrate; and the diffusion speed of electrophoresis ink droplets is accelerated.

Description

Technical Field

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

[0002] Total reflection display devices reflect ambient light to achieve display, without the need for backlight, and have the characteristics of eye protection and low power consumption, especially in outdoor, sunlight or other strong light sources, the display effect is good. Total reflection display devices can be applied to various display devices, such as smart wearables, outdoor billboards, handheld terminals, etc. Summary of the invention

[0003] The embodiments of the present application provide a display device and a method for manufacturing the same, which accelerate the diffusion speed of electrophoretic ink droplets.

[0004] The embodiment of the present application provides a display device, comprising: a first substrate and a second substrate arranged opposite to each other, and an electrophoretic layer arranged between the first substrate and the second substrate; the electrophoretic layer comprises first electrophoretic particles and second electrophoretic particles having opposite electrical properties, the first electrophoretic particles are configured to absorb visible light, and the second electrophoretic particles are configured to reflect visible light;

[0005] A rough dielectric layer is provided on the side of the first substrate close to the electrophoretic layer. The rough dielectric layer is a liquid-philic material. The surface of the rough dielectric layer close to the electrophoretic layer is in contact with the electrophoretic layer. The roughness of the surface of the rough dielectric layer close to the electrophoretic layer is greater than the roughness of the surface of the first substrate close to the electrophoretic layer.

[0006] In an exemplary embodiment, the electrophoretic layer is an oily liquid, and the rough medium layer is an oleophilic material; or, the electrophoretic layer is an aqueous liquid, and the rough medium layer is a hydrophilic material.

[0007] In an exemplary embodiment, the rough dielectric layer includes a substrate and at least one protrusion, the substrate is disposed on the surface of the first substrate on a side close to the electrophoretic layer, the at least one protrusion is disposed on the surface of the substrate on a side close to the electrophoretic layer, the at least one protrusion protrudes toward a direction close to the electrophoretic layer, the at least one protrusion extends into the surface of the electrophoretic layer on a side close to the first substrate, and the at least one protrusion is configured to increase the roughness of the surface of the rough dielectric layer on a side close to the electrophoretic layer.

[0008] In an exemplary embodiment, the at least one protrusion is shaped like a cone or a triangular pyramid.

[0009] In an exemplary embodiment, the height of the at least one protrusion is greater than or equal to 0.5 micrometers and less than or equal to 3 micrometers, and the height of the protrusion is the maximum dimension of the protrusion in a direction perpendicular to the plane where the display device is located.

[0010] In an exemplary embodiment, at least two protrusions in the rough dielectric layer have different heights; or, all protrusions in the rough dielectric layer have substantially the same height, the protrusion height being the maximum dimension of the protrusion in a direction perpendicular to the plane where the display device is located.

[0011] In an exemplary embodiment, the protrusions in the rough medium layer are arranged along a first direction to form a protrusion row, and the protrusion rows are arranged in sequence along a second direction to form a protrusion array, the outer contours of the orthographic projections of adjacent protrusions in the protrusion row on the plane where the display device is located contact each other, and the outer contour of the orthographic projection of one protrusion in the protrusion row on the plane where the display device is located contacts the outer contour of the orthographic projection of a corresponding protrusion in an adjacent protrusion row on the plane where the display device is located; and / or, the protrusions in the rough medium layer are arranged along a first direction to form a first protrusion row and a second protrusion row, and the first protrusion row and the second protrusion row are arranged alternately along the second direction to form a protrusion array, the outer contour of the orthographic projection of one protrusion in the first protrusion row on the plane where the display device is located contacts the outer contours of the orthographic projections of two corresponding protrusions in an adjacent second protrusion row on the plane where the display device is located, and the first direction and the second direction intersect with each other.

[0012] In an exemplary embodiment, the first substrate includes a first oscillation line and a second oscillation line spaced apart in a direction parallel to the plane where the display device is located, the orthographic projections of the first oscillation line and the second oscillation line on the plane where the display device is located overlap with the orthographic projections of electrophoretic ink droplets used to form the electrophoretic layer on the plane where the display device is located, the first oscillation line is configured to apply a first oscillation voltage, the second oscillation line is configured to apply a second oscillation voltage, the first oscillation voltage is different from the second oscillation voltage, and the first oscillation line and the second oscillation line apply oscillation waves to the electrophoretic ink droplets through a voltage difference.

[0013] In an exemplary embodiment, in a first time period, the first oscillation routing and the second oscillation routing apply a first oscillation wave to the electrophoretic ink droplet through a voltage difference; in a second time period, the first oscillation routing and the second oscillation routing apply a second oscillation wave to the electrophoretic ink droplet through a voltage difference, and the first oscillation wave and the second oscillation wave have opposite phases.

[0014] In an exemplary embodiment, the first substrate includes a plurality of data lines extending along the second direction, the plurality of data lines are arranged at intervals along the first direction, at least some of the plurality of data lines serve as the first oscillation routing line and the second oscillation routing line, and the first oscillation routing line is adjacent to the second oscillation routing line; and / or, at least one data line other than the first oscillation routing line and the second oscillation routing line is arranged between the first oscillation routing line and the second oscillation routing line, and the first direction and the second direction intersect with each other.

[0015] In an exemplary embodiment, the first substrate includes a plurality of gate lines extending along a first direction, the plurality of gate lines are arranged at intervals along a second direction, at least some of the plurality of gate lines serve as the first oscillation routing and the second oscillation routing, and the first oscillation routing is adjacent to the second oscillation routing; and / or, at least one gate line other than the first oscillation routing and the second oscillation routing is arranged between the first oscillation routing and the second oscillation routing, and the first direction and the second direction intersect with each other.

[0016] In an exemplary embodiment, it also includes an isolation wall, which is arranged between the first substrate and the second substrate, and the isolation wall separates the electrophoretic layer to form a plurality of electrophoretic units, and the orthographic projection of the surface of the isolation wall close to the first substrate on the plane where the display device is located does not overlap with the orthographic projection of the rough medium layer on the plane where the display device is located.

[0017] In an exemplary embodiment, the first substrate includes a first base, a driving circuit layer arranged on a side of the first base close to the electrophoretic layer, and a first electrode arranged on a side of the driving circuit layer close to the electrophoretic layer; the rough dielectric layer is arranged on a surface of the first electrode close to the electrophoretic layer; the second substrate includes a second base, a color film structure layer arranged on a side of the second base close to the electrophoretic layer, and a second electrode arranged on a side of the color film structure layer close to the electrophoretic layer.

[0018] Other features and advantages of the present application will be described in the following description, and partly become apparent from the description, or be understood by implementing the present application. Other advantages of the present application can be realized and obtained by the schemes described in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide an understanding of the technical solution of the present application and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the technical solution of the present application and do not constitute a limitation on the technical solution of the present application.

[0020] Figure 1is a schematic diagram of a cross-sectional structure of a related display device;

[0021] Figure 2 is a schematic cross-sectional structure diagram of another related display device;

[0022] Figure 3 It is a schematic diagram of the planar structure of another related display device after electrophoretic ink droplets are formed on the first substrate;

[0023] Figure 4 is a schematic diagram of a planar structure of another related display device in a display state;

[0024] Figure 5 A schematic cross-sectional structure diagram of a display device provided in an embodiment of the present disclosure;

[0025] Figure 6 A schematic diagram of a planar structure of a partition wall in a display device provided by an embodiment of the present disclosure;

[0026] Figure 7 A schematic diagram of a cross-sectional structure of a rough dielectric layer in a display device provided by an embodiment of the present disclosure;

[0027] Figure 8a A three-dimensional image of a protrusion in a display device provided by an embodiment of the present disclosure;

[0028] Figure 8b A schematic diagram of a planar structure of a protrusion in a display device provided in an embodiment of the present disclosure;

[0029] Figure 9a A three-dimensional diagram of another protrusion in a display device provided by an embodiment of the present disclosure;

[0030] Figure 9b A schematic diagram of another planar structure of a protrusion in a display device provided in an embodiment of the present disclosure;

[0031] Fig.10a A three-dimensional diagram of another protrusion in a display device provided by an embodiment of the present disclosure;

[0032] Fig.10b A schematic diagram of another planar structure of a protrusion in a display device provided in an embodiment of the present disclosure;

[0033] Fig.11 A schematic diagram of the planar structure of a first substrate in a display device provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0034] The present application describes multiple embodiments, but the description is exemplary rather than restrictive, and it is obvious to those skilled in the art that there may be more embodiments and implementations within the scope of the embodiments described in the present application. Although many possible feature combinations are shown in the drawings and discussed in the specific embodiments, many other combinations of the disclosed features are also possible. Unless specifically limited, any feature or element of any embodiment may be used in combination with any other feature or element in any other embodiment, or may replace any other feature or element in any other embodiment.

[0035] The present application includes and contemplates combinations of features and elements known to those of ordinary skill in the art. The embodiments, features and elements disclosed in the present application may also be combined with any conventional features or elements to form a unique invention scheme. Any features or elements of any embodiment may also be combined with features or elements from other invention schemes to form another unique invention scheme. Therefore, it should be understood that any feature shown and / or discussed in the present application may be implemented individually or in any appropriate combination. Therefore, except for the limitations made according to the attached claims and their equivalents, the embodiments are not subject to other restrictions. In addition, various modifications and changes may be made within the scope of protection of the attached claims.

[0036] In addition, when describing representative embodiments, the specification may have presented the method and / or process as a specific sequence of steps. However, to the extent that the method or process does not rely on the specific order of the steps described herein, the method or process should not be limited to the steps of the specific order described. As will be understood by those of ordinary skill in the art, other sequences of steps are also possible. Therefore, the specific sequence of the steps set forth in the specification should not be interpreted as a limitation to the claims. In addition, the claims for the method and / or process should not be limited to the steps of performing them in the order written, and those skilled in the art can easily understand that these sequences can be changed and still remain within the spirit and scope of the embodiments of the present application.

[0037] Figure 1 FIG. 1 is a schematic diagram of a cross-sectional structure of a related display device. Figure 1As shown, the relevant display device can be a microcapsule structure. The relevant display device includes a first substrate 100' and a second substrate 200' arranged relatively to each other, and an electrophoretic layer 300' arranged between the first substrate 100' and the second substrate 200'. The first substrate 100' can be used as an array substrate, and the first substrate 100' includes a first base 101' and a first electrode 102' arranged on the side of the first substrate 101' close to the electrophoretic layer 300'. The second substrate 200' can be used as a color filter substrate, and the second substrate 200' includes a second base 201' and a second electrode 202' arranged on the side of the second substrate 201' close to the electrophoretic layer 300'. The electrophoretic layer 300' includes at least one microcapsule 301', and a plurality of black microparticles 31' and white microparticles 32' are arranged in the microcapsule 301', and the plurality of black microparticles 31' are all negatively charged, and the plurality of white microparticles 32' are all positively charged. The plurality of black particles 31' and the plurality of white particles 32' can move under the drive of the voltage between the first electrode 102' and the second electrode 202', so that the sub-pixels of the display device are in a bright state or a dark state. When a positive voltage is input to the first electrode 102' and a negative voltage is input to the second electrode 202', the plurality of black particles 31' move in a direction close to the first electrode 102', so that the plurality of black particles 31' are distributed on the side of the plurality of white particles 32' close to the first electrode 102'; the plurality of white particles 32' move in a direction close to the second electrode 202', so that the plurality of white particles 32' are distributed on the side of the plurality of black particles 31' close to the second electrode 202'; at this time, the ambient light incident from the second substrate 200' is reflected at the plurality of white particles 32' in the microcapsule 301', so that the sub-pixels of the display device are in a bright state. When a negative voltage is input to the first electrode 102' and a positive voltage is input to the second electrode 202', the plurality of black particles 31' move in a direction close to the second electrode 202', so that the plurality of black particles 31' are distributed on the side of the plurality of white particles 32' close to the second electrode 202'; the plurality of white particles 32' move in a direction close to the first electrode 102', so that the plurality of white particles 32' are distributed on the side of the plurality of black particles 31' close to the first electrode 102'; at this time, the ambient light incident from the second substrate 200' is absorbed by the plurality of black particles 31' in the microcapsule 301', so that the sub-pixels of the display device are in a dark state.

[0038] Figure 2 FIG. 1 is a schematic diagram of a cross-sectional structure of another related display device. Figure 2As shown, the relevant display device can be a microcup structure (Microcup). The relevant display device includes a first substrate 100' and a second substrate 200' arranged relatively to each other, and an electrophoretic layer 300' arranged between the first substrate 100' and the second substrate 200'. The first substrate 100' can be used as an array substrate, and the first substrate 100' includes a first base 101', a driving circuit layer 103' arranged on the side of the first substrate 101' close to the electrophoretic layer 300', and a first electrode 102' arranged on the side of the driving circuit layer 103' close to the electrophoretic layer 300'. The second substrate 200' can be used as a color filter substrate, and the second substrate 200' includes a second base 201', a color filter structure layer 203' arranged on the side of the second base 201' close to the electrophoretic layer 300', and a second electrode 202' arranged on the side of the color filter structure layer 203' close to the electrophoretic layer 300'. The electrophoretic layer 300' includes a plurality of electrophoretic units 310', each of which includes a dispersion medium, a plurality of electrophoretic particles, a charge control agent and a dispersant. The plurality of electrophoretic particles include a plurality of black particles and a plurality of white particles. The plurality of black particles and the plurality of white particles can move under the drive of the voltage between the first electrode 102' and the second electrode 202', so as to realize that the sub-pixels of the display device are in a bright state or a dark state. The relevant display device also includes an isolation wall 400' arranged between the first substrate 100' and the second substrate 200'. The isolation wall 400' is connected to the first substrate 100' at one end perpendicular to the plane direction of the display device (the third direction D3), and the isolation wall 400' is connected to the second substrate 200' at the other end perpendicular to the plane direction of the display device (the third direction D3). The isolation wall 400', the first substrate 100' and the second substrate 200' form a plurality of independent microcavities. Each electrophoretic unit 310' of the electrophoretic layer 300' is arranged in a corresponding microcavity. The isolation wall 400' separates adjacent electrophoretic units 310', thereby preventing the electrophoretic particles in adjacent electrophoretic units 310' from flowing mutually, thereby ensuring the display effect of the display device.

[0039] Figure 3 FIG. 1 is a schematic diagram of a planar structure of another related display device after electrophoretic ink droplets are formed on a first substrate. A display device with a microcup structure generally uses a drip filling process (One Drop Filling) to form an electrophoretic layer. The preparation process of forming an electrophoretic layer by the drip filling process (One Drop Filling) includes: first forming a retaining wall 104' at the edge of the first substrate; then dripping a plurality of electrophoretic ink droplets 105' on the first substrate, and the plurality of electrophoretic ink droplets 105' diffuse on the first substrate to form an electrophoretic layer, such as Figure 3 As shown; then, a separation wall is formed on the second substrate; then, the first substrate and the second substrate are assembled to achieve the encapsulation of the electrophoretic ink droplets.

[0040] Through research by the inventors of this application, it was found that after electrophoretic ink droplets were dripped on the first substrate, the electrophoretic ink droplets diffused slowly on the surface of the first substrate. When the first substrate was aligned with the second substrate, the electrophoretic particles in the electrophoretic ink droplets were not evenly dispersed, resulting in boundaries between adjacent electrophoretic ink droplets. After the first substrate was aligned with the second substrate, the isolation wall on the second substrate restricted the flow of the electrophoretic ink droplets, resulting in the electrophoretic ink droplets being unable to form a uniform electrophoretic layer. The electrophoretic particles in the electrophoretic layer were unevenly dispersed, affecting the display effect of the display device.

[0041] Figure 4 FIG. 1 is a schematic diagram of a planar structure of another related display device in a display state. Figure 4 As shown, the related display device has horizontal and vertical stripes 500' in the display state because the electrophoretic particles in the electrophoretic layer are not evenly dispersed. For example, the display device has horizontal and vertical white stripes 500' in the dark state; or the display device has horizontal and vertical black stripes 500' in the bright state.

[0042] The embodiment of the present application provides a display device, comprising: a first substrate and a second substrate arranged opposite to each other, and an electrophoretic layer arranged between the first substrate and the second substrate; the electrophoretic layer comprises first electrophoretic particles and second electrophoretic particles having opposite electrical properties, the first electrophoretic particles are configured to absorb visible light, and the second electrophoretic particles are configured to reflect visible light;

[0043] A rough dielectric layer is provided on the side of the first substrate close to the electrophoretic layer. The rough dielectric layer is a liquid-philic material. The surface of the rough dielectric layer close to the electrophoretic layer is in contact with the electrophoretic layer. The roughness of the surface of the rough dielectric layer close to the electrophoretic layer is greater than the roughness of the surface of the first substrate close to the electrophoretic layer.

[0044] In an exemplary embodiment, the electrophoretic layer is an oily liquid, and the rough medium layer is an oleophilic material; or, the electrophoretic layer is an aqueous liquid, and the rough medium layer is a hydrophilic material.

[0045] In an exemplary embodiment, the rough dielectric layer includes a substrate and at least one protrusion, the substrate is disposed on the surface of the first substrate on a side close to the electrophoretic layer, the at least one protrusion is disposed on the surface of the substrate on a side close to the electrophoretic layer, the at least one protrusion protrudes toward a direction close to the electrophoretic layer, the at least one protrusion extends into the surface of the electrophoretic layer on a side close to the first substrate, and the at least one protrusion is configured to increase the roughness of the surface of the rough dielectric layer on a side close to the electrophoretic layer.

[0046] Figure 5 FIG. 1 is a schematic cross-sectional view of a display device provided in an embodiment of the present disclosure. In an exemplary embodiment, Figure 5 As shown, the display device of the embodiment of the present disclosure may be a microcup structure. On a plane perpendicular to the display device, the display device of the embodiment of the present disclosure includes a first substrate 100 and a second substrate 200 arranged opposite to each other, and an electrophoretic layer 300 and a partition wall 400 arranged between the first substrate 100 and the second substrate 200. The first substrate 100 may be used as an array substrate, the first substrate 100 includes a first electrode 102, the second substrate 200 may be used as a color film substrate, and the second substrate 200 includes a second electrode 202. The electrophoretic layer 300 includes a plurality of first electrophoretic particles 31 and a plurality of second electrophoretic particles 32, the first electrophoretic particles 31 are configured to absorb visible light, the second electrophoretic particles 32 are configured to reflect visible light, and the electrical properties of the first electrophoretic particles 31 are opposite to those of the second electrophoretic particles 32. The isolation wall 400 is connected to the first substrate 100 and the second substrate 200 at both ends perpendicular to the plane direction (third direction D3) where the display device is located, and the isolation wall 400 separates the electrophoretic layer 300 to form a plurality of independent electrophoretic units 310. The plurality of first electrophoretic particles 31 and the plurality of second electrophoretic particles 32 in each electrophoretic unit 310 can move under the voltage applied by the first electrode 102 and the second electrode 202. When the plurality of first electrophoretic particles 31 move to the side close to the second substrate 200 under the voltage applied by the first electrode 102 and the second electrode 202, the plurality of first electrophoretic particles 31 absorb the ambient light incident from the second substrate 200, so that the sub-pixels of the display device are in a dark state; when the plurality of second electrophoretic particles 32 move to the side close to the second substrate 200 under the voltage applied by the first electrode 102 and the second electrode 202, the plurality of second electrophoretic particles 32 reflect the ambient light incident from the second substrate 200, so that the sub-pixels of the display device are in a bright state.

[0047] In an exemplary embodiment, the first substrate 100 includes a first base 101, a driving circuit layer 103 disposed on a side of the first base 101 close to the electrophoretic layer 300, and a first electrode 102 disposed on a side of the driving circuit layer 103 close to the electrophoretic layer 300. The first base 101 may be a flexible base, or may be a rigid base. The driving circuit layer 103 includes at least a driving circuit, and the driving circuit may include a transistor and a storage capacitor. The first electrode 102 may be a transparent electrode, for example, indium tin oxide (ITO), and the first electrode 102 is connected to the driving circuit. Among them, the first electrodes 102 of each sub-pixel of the display device are disconnected from each other.

[0048] In an exemplary embodiment, the second substrate 200 includes a second base 201, a color filter structure layer 203 disposed on a side of the second base 201 close to the electrophoretic layer 300, and a second electrode 202 disposed on a side of the color filter structure layer 203 close to the electrophoretic layer 300. The second base 201 may be a flexible base, or may be a rigid base. The color filter structure layer 203 includes a filter layer 2031 and a light blocking layer 2032. The second electrode 202 may be a transparent electrode, for example, indium tin oxide (ITO), and the second electrode 202 is connected to the driving circuit. The second electrodes 202 of each sub-pixel of the display device are interconnected integral structures.

[0049] In an exemplary embodiment, the electrophoretic layer 300 includes a plurality of electrophoretic units 310, and the electrophoretic units 310 include a dispersion medium, a plurality of electrophoretic particles, a charge control agent, and a dispersant. The plurality of electrophoretic particles include a plurality of first electrophoretic particles 31 and a plurality of second electrophoretic particles 32, the first electrophoretic particles 31 are configured to absorb visible light, the second electrophoretic particles 32 are configured to reflect visible light, and the electrical properties of the first electrophoretic particles 31 are opposite to those of the second electrophoretic particles 32, for example, the first electrophoretic particles 31 may be black particles with negative charges, and the second electrophoretic particles 32 may be white particles with positive charges.

[0050] In an exemplary embodiment, the first electrophoretic particles 31 and the second electrophoretic particles 32 can move under the drive of the voltage between the first electrode 102 and the second electrode 202, so that the sub-pixels of the display device are in a bright state or a dark state. For example, when a positive voltage is input to the first electrode 102 and a negative voltage is input to the second electrode 202, the plurality of first electrophoretic particles 31 in the electrophoretic unit 310 move in a direction close to the first electrode 102, so that the plurality of first electrophoretic particles 31 are distributed on the side of the plurality of second electrophoretic particles 32 close to the first electrode 102; the plurality of second electrophoretic particles 32 move in a direction close to the second electrode 202, so that the plurality of second electrophoretic particles 32 are distributed on the side of the plurality of first electrophoretic particles 31 close to the second electrode 202; at this time, the ambient light incident from the second substrate 200 is reflected at the plurality of second electrophoretic particles 32 in the electrophoretic unit 310, so that the sub-pixels of the display device are in a bright state, such as Figure 5 When a negative voltage is input to the first electrode 102 and a positive voltage is input to the second electrode 202, the plurality of first electrophoretic particles 31 in the electrophoretic unit 310 move in a direction close to the second electrode 202, so that the plurality of first electrophoretic particles 31 are distributed on the side of the plurality of second electrophoretic particles 32 close to the second electrode 202; the plurality of second electrophoretic particles 32 move in a direction close to the first electrode 102, so that the plurality of second electrophoretic particles 32 are distributed on the side of the plurality of first electrophoretic particles 31 close to the first electrode 102; at this time, the ambient light incident from the second substrate 200 is absorbed by the plurality of first electrophoretic particles 31 in the electrophoretic unit 310, so that the sub-pixels of the display device are in a dark state.

[0051] In an exemplary embodiment, the electrophoretic unit 310 of the electrophoretic layer 300 is arranged corresponding to the filter layer 2031 of the color filter structure layer 203, and the orthographic projection of the electrophoretic unit 310 of the electrophoretic layer 300 on the plane where the display device is located overlaps at least partially with the orthographic projection of the filter layer of the color filter structure layer 203 on the plane where the display device is located. For example, the orthographic projection of the electrophoretic unit 310 of the electrophoretic layer 300 on the plane where the display device is located includes the orthographic projection of the filter layer 2031 of the color filter structure layer 203 on the plane where the display device is located.

[0052] In an exemplary embodiment, the isolation wall 400 is disposed between the first substrate 100 and the second substrate 200, and the isolation wall 400 is connected to the driving circuit layer 103 of the first substrate 100 at one end perpendicular to the plane direction (third direction D3) where the display device is located, and the isolation wall 400 is connected to the second electrode 202 of the second substrate 200 at the other end perpendicular to the plane direction (third direction D3) where the display device is located. The isolation wall 400, the first substrate 100, and the second substrate 200 form a plurality of microcavities independent of each other, and each electrophoretic unit 310 of the electrophoretic layer 300 is disposed in a corresponding microcavity, and the isolation wall 400 separates adjacent electrophoretic units 310, thereby preventing electrophoretic particles in adjacent electrophoretic units 310 from flowing to each other.

[0053] In an exemplary embodiment, the orthographic projection of the isolation wall 400 on the plane where the display device is located overlaps at least partially with the orthographic projection of the light blocking layer 2032 of the color filter structure layer 203 on the plane where the display device is located. For example, the orthographic projection of the isolation wall 400 on the plane where the display device is located is located in the orthographic projection of the light blocking layer 2032 of the color filter structure layer 203 on the plane where the display device is located.

[0054] In an exemplary embodiment, the cross-sectional shape of the isolation wall 400 in the direction perpendicular to the plane of the display device (third direction D3) is an inverted trapezoid. In some embodiments, the cross-sectional shape of the isolation wall in the direction perpendicular to the plane of the display device (third direction D3) can be a regular trapezoid or a rectangle.

[0055] Figure 6 FIG. 1 is a schematic diagram of a planar structure of a partition wall in a display device provided in an embodiment of the present disclosure. In an exemplary embodiment, Figure 6 As shown, on a plane parallel to the display device, the isolation wall 400 is in a grid shape, a plurality of rectangular openings are arranged in the isolation wall 400, and the electrophoresis unit 310 is arranged in the rectangular openings.

[0056] In an exemplary embodiment, if Figure 5As shown, the display device of the embodiment of the present disclosure further includes a rough dielectric layer 500, which is disposed on the surface of the first electrode 102 of the first substrate 100 close to the electrophoretic layer 300, and the rough dielectric layer 500 is a lyophilic material. The orthographic projection of the rough dielectric layer 500 on the plane where the display device is located overlaps at least partially with the orthographic projection of the electrophoretic layer 300 on the plane where the display device is located, and the surface of the rough dielectric layer 500 close to the electrophoretic layer 300 contacts the surface of the electrophoretic layer 300 close to the first substrate 100. The roughness of the surface of the rough dielectric layer 500 close to the electrophoretic layer 300 is greater than the roughness of the surface of the first substrate 100 close to the electrophoretic layer 300. For example, the roughness of the surface of the rough dielectric layer 500 close to the electrophoretic layer 300 is greater than the roughness of the surface of the first electrode 102 close to the electrophoretic layer 300.

[0057] The display device of the disclosed embodiment diffuses electrophoretic ink droplets on the surface of the rough dielectric layer 500. The roughness of the surface of the rough dielectric layer 500 close to the electrophoretic layer 300 is greater than the roughness of the surface of the first substrate 100 close to the electrophoretic layer 300. This increases the contact area between the electrophoretic ink droplets and the surface of the rough dielectric layer 500, increases the wettability of the electrophoretic ink droplets, and accelerates the diffusion speed of the electrophoretic ink droplets.

[0058] The display device of the embodiment of the present disclosure uses the rough dielectric layer 500 as a lyophilic material to increase the wettability of the electrophoretic ink droplets and accelerate the diffusion speed of the electrophoretic ink droplets.

[0059] In an exemplary embodiment, the electrophoretic layer 300 is an oily liquid, and the rough dielectric layer 500 is an oleophilic material. For example, the rough dielectric layer 500 is an alkane material.

[0060] The display device of the embodiment of the present disclosure reduces the contact angle of the electrophoretic ink droplets forming the electrophoretic layer 300 , increases the wettability of the electrophoretic ink droplets, and accelerates the diffusion speed of the electrophoretic ink droplets by making the electrophoretic layer 300 an oily liquid and the rough medium layer 500 an oleophilic material.

[0061] In an exemplary embodiment, the electrophoretic layer 300 is an aqueous liquid, and the rough medium layer 500 is a hydrophilic material.

[0062] The display device of the embodiment of the present disclosure reduces the contact angle of the electrophoretic ink droplets forming the electrophoretic layer 300 , increases the wettability of the electrophoretic ink droplets, and accelerates the diffusion speed of the electrophoretic ink droplets by making the electrophoretic layer 300 an aqueous liquid and the rough medium layer 500 a hydrophilic material.

[0063] In an exemplary embodiment, the rough dielectric layer 500 includes a substrate 52 and at least one protrusion 51, the substrate 52 is disposed on the surface of the first electrode 102 of the first substrate 100 close to the electrophoretic layer 300, the at least one protrusion 51 is disposed on the surface of the substrate 52 close to the electrophoretic layer 300, the at least one protrusion 51 protrudes toward the direction close to the electrophoretic layer 300, the at least one protrusion 51 extends into the surface of the electrophoretic layer 300 close to the first substrate 100, and the at least one protrusion 51 is configured to increase the roughness of the surface of the rough dielectric layer 500 close to the electrophoretic layer 300.

[0064] The display device of the embodiment of the present disclosure increases the roughness of the surface of the rough medium layer 500 close to the electrophoretic layer 300 by at least one protrusion 51, so that the contact area between the electrophoretic ink droplets and the surface of the rough medium layer 500 is larger, the wettability of the electrophoretic ink droplets is increased, and the diffusion speed of the electrophoretic ink droplets is accelerated.

[0065] In an exemplary embodiment, the rough dielectric layer 500 includes a plurality of raised regions 501, which are disposed in a microcavity formed by the isolation wall 400, the first substrate 100, and the second substrate 200, and a protrusion 51 of at least one raised region 501 extends into a surface of the electrophoresis unit 310 in the corresponding microcavity on a side close to the first substrate 100.

[0066] In an exemplary embodiment, the orthographic projection of the rough dielectric layer 500 on the plane where the display device is located does not overlap with the orthographic projection of the surface of the isolation wall 400 close to the first substrate on the plane where the display device is located.

[0067] Figure 7 FIG. 1 is a schematic cross-sectional structure diagram of a rough dielectric layer in a display device provided in an embodiment of the present disclosure. In an exemplary embodiment, Figure 5 and Figure 7 As shown, one end of the protrusion 51 perpendicular to the plane where the display device is located is connected to the surface of the substrate 52 close to the electrophoretic layer 300, and the other end of the protrusion 51 perpendicular to the plane where the display device is located extends in a direction close to the electrophoretic layer 300 and extends into the surface of the electrophoretic layer 300 close to the first substrate 100. The protrusion 51 and the substrate 52 can be made of the same material and connected to each other as a whole.

[0068] In an exemplary embodiment, the cross section of at least one protrusion 51 perpendicular to the plane where the display device is located is triangular. The height h of at least one protrusion 51 is greater than or equal to 0.5 micrometers and less than or equal to 3 micrometers. The height h of the protrusion 51 is the maximum dimension of the protrusion in a direction perpendicular to the plane where the display device is located.

[0069] The display device of the embodiment of the present disclosure can increase the roughness of the surface of the rough medium layer close to the electrophoretic layer 300 by making the height h of the protrusion 51 greater than or equal to 0.5 microns and less than or equal to 3 microns, and can prevent the protrusion 51 from affecting the display.

[0070] In an exemplary embodiment, at least two protrusions 51 in the rough dielectric layer have different heights h; or, the heights h of all protrusions 51 in the rough dielectric layer are substantially the same.

[0071] In an exemplary embodiment, the protrusion 51 may be formed using an exposure process or an imprint process.

[0072] According to the Wenzel model, the display device of the embodiment of the present disclosure spreads the electrophoretic ink droplets on the protrusions 51 of the rough medium layer 500. The protrusions 51 increase the roughness of the surface of the rough medium layer 500, thereby increasing the actual contact area of ​​the electrophoretic ink droplets, increasing the wettability of the electrophoretic ink droplets, and accelerating the diffusion speed of the electrophoretic ink droplets.

[0073] The Wenzel model introduces the roughness factor r on the basis of Young's equilibrium equation. The conditions for establishing the model are: 1. The local contact angle of the rough dielectric layer surface conforms to the Young's equation; 2. The surface of the rough dielectric layer has a certain roughness and the chemical composition is evenly distributed; 3. The roughness of the rough dielectric layer surface is smaller than the size of the electrophoretic ink droplet. The roughness r of the rough dielectric layer surface is defined as:

[0074]

[0075] Wherein, Ssurface is the actual surface area of ​​the protruding structure layer, Sprojection is the relative surface area of ​​the orthographic projection of the actual surface area of ​​the protruding structure layer on the plane where the total reflection display device is located, Ssurface>Sprojection, r>1.

[0076] During the diffusion process of the electrophoretic ink droplet, the distance the electrophoretic ink droplet moves on the surface of the rough dielectric layer is dx, and the contact angle of the electrophoretic ink droplet on the protrusion on the rough dielectric layer is θ r , the change in surface energy per unit length and the distance moved dx satisfy the following relationship: dE = r(γ SL -γ SG )dx+γ LG dx cosθ r When in equilibrium, that is, dE = 0, combined with the formula: The Wenzel model can be derived: cosθ r =rcosθ.

[0077] It can be deduced from the Wenzel model that the wetting and spreading effect on a rough surface is better than that on a smooth surface. When r>1, and the contact angle θ on a smooth surface is <90°, then θr<θ, that is, the wetting angle of the liquid on a rough surface is smaller than that on a smooth surface; when the roughness of the rough medium layer increases, the wetting enhancement effect becomes more obvious as r increases. When θ>90°, the wetting angle of the liquid on a rough surface is greater than that on a smooth surface, which increases the hydrophobicity of the liquid. The greater the roughness, the stronger the hydrophobicity.

[0078] Figure 8a A three-dimensional image of a protrusion in a display device provided by an embodiment of the present disclosure; Figure 8b This is a schematic diagram of a planar structure of a protrusion in a display device provided by an embodiment of the present disclosure. Figure 8b for Figure 8a In an exemplary embodiment, as Figure 8a and Figure 8b As shown, the shape of the protrusion 51 may be conical, and the shape of the orthographic projection of the protrusion 51 on the plane where the display device is located is circular.

[0079] In an exemplary embodiment, the protrusions 51 in the rough medium layer are arranged along the first direction D1 to form a protrusion row 52, ​​and the protrusion rows 52 are arranged in sequence along the second direction D2 to form a protrusion array, and the outer contours of the orthographic projections of adjacent protrusions 51 in the protrusion row 52 on the plane where the display device is located are in contact with each other. The outer contour of the orthographic projection of a protrusion 51 in the current protrusion row 52 on the plane where the display device is located is in contact with the outer contour of the orthographic projection of a protrusion 51 in the previous row of protrusion rows 52 on the plane where the display device is located; the outer contour of the orthographic projection of a protrusion 51 in the current row of protrusion rows 52 on the plane where the display device is located is in contact with the outer contour of the orthographic projection of a protrusion 51 in the next row of protrusion rows 52 on the plane where the display device is located. The first direction D1 and the second direction D2 intersect each other, and for example, the first direction D1 and the second direction D2 are perpendicular to each other.

[0080] Figure 9a A three-dimensional diagram of another protrusion in a display device provided by an embodiment of the present disclosure; Figure 9b This is a schematic diagram of another planar structure of a protrusion in a display device provided by an embodiment of the present disclosure. Figure 9b for Figure 9a In an exemplary embodiment, as Figure 9a and Figure 9b As shown, the shape of the protrusion 51 may be conical, and the shape of the orthographic projection of the protrusion 51 on the plane where the display device is located is circular.

[0081] In an exemplary embodiment, some protrusions 51 in the rough medium layer are arranged along the first direction D1 to form a first protrusion row 521, and some protrusions 51 in the rough medium layer are arranged along the first direction D1 to form a second protrusion row 522. The first protrusion row 521 and the second protrusion row 522 are arranged alternately along the second direction D2 to form a protrusion array. The center of the orthographic projection of the protrusions 51 in the first protrusion row 521 on the plane where the display device is located is alternately arranged with the center of the orthographic projection of the protrusions 51 in the second protrusion row 522 on the plane where the display device is located in the second direction D2. The outer contour of the orthographic projection of one protrusion 51 in the first protrusion row 521 on the plane where the display device is located contacts the outer contour of the orthographic projection of two protrusions 51 in the adjacent second protrusion row 522 on the plane where the display device is located. The first direction D1 and the second direction D2 intersect each other, and for example, the first direction D1 and the second direction D2 are perpendicular to each other.

[0082] Fig.10a A three-dimensional diagram of another protrusion in a display device provided by an embodiment of the present disclosure; Fig.10b This is a schematic diagram of another planar structure of a protrusion in a display device provided by an embodiment of the present disclosure. Fig.10b for Fig.10a In an exemplary embodiment, as Fig.10a and Fig.10b As shown, the shape of the protrusion 51 may be a triangular pyramid, and the shape of the orthographic projection of the protrusion 51 on the plane where the display device is located is a triangle.

[0083] In an exemplary embodiment, some protrusions 51 in the rough dielectric layer are arranged along the first direction D1 to form a first protrusion row 521, and some protrusions 51 in the rough dielectric layer are arranged along the first direction D1 to form a second protrusion row 522. The first protrusion row 521 and the second protrusion row 522 are arranged alternately along the second direction D2 to form a protrusion array. One corner of the orthographic projection of each protrusion 51 on the plane where the display device is located is arranged toward the second direction D2, and one corner of the orthographic projection of each protrusion 51 on the plane where the display device is located is arranged toward the opposite direction of the second direction D2. The two sides of the orthographic projection of one protrusion 51 in the first protrusion row 521 on the plane where the display device is located are respectively in contact with one side of the orthographic projection of two protrusions 51 in the adjacent second protrusion row 522 on the plane where the display device is located. The first direction D1 and the second direction D2 intersect each other, and for example, the first direction D1 and the second direction D2 are perpendicular to each other.

[0084] Fig.11 FIG. 1 is a schematic diagram of a planar structure of a first substrate in a display device provided in an embodiment of the present disclosure. In an exemplary embodiment, Fig.11 As shown, the first substrate 100 includes at least one oscillation wiring group, the orthographic projection of the at least one oscillation wiring group on the plane where the display device is located overlaps with the orthographic projection of the electrophoretic ink droplets used to form the electrophoretic layer on the plane where the display device is located, and the oscillation wiring group is configured to apply oscillation waves to the electrophoretic ink droplets to oscillate the electrophoretic ink droplets, thereby accelerating the diffusion speed of the electrophoretic ink droplets.

[0085] In an exemplary embodiment, at least one oscillation line group includes a first oscillation line 61 and a second oscillation line 62 spaced apart in a direction parallel to the plane where the display device is located. The extension direction of the first oscillation line 61 in at least one oscillation line group is substantially parallel to the extension direction of the second oscillation line 62. The orthographic projections of the first oscillation line 61 and the second oscillation line 62 on the plane where the display device is located overlap with the orthographic projections of the electrophoretic ink droplets on the plane where the display device is located. The first oscillation line 61 is configured to apply a first oscillation voltage (e.g., 0V), and the second oscillation line 62 is configured to apply a second oscillation voltage (e.g., +15V or -15V). The first oscillation voltage is different from the second oscillation voltage. The first oscillation line 61 and the second oscillation line 62 apply oscillation waves to the electrophoretic ink droplets through a voltage difference to oscillate the electrophoretic ink droplets, thereby accelerating the diffusion speed of the electrophoretic ink droplets.

[0086] The display device of the embodiment of the present disclosure applies an oscillation wave to the electrophoretic ink droplets through the first oscillation wiring 61 and the second oscillation wiring 62 to accelerate the diffusion speed of the electrophoretic ink droplets and ensure that the electrophoretic layer formed by the electrophoretic ink droplets is uniform.

[0087] When the electrophoretic ink droplets are poured onto the surface of the rough dielectric layer 500 on the first substrate 100, in the first time period, a first oscillation voltage is applied to the first oscillation wiring 61, and the first oscillation voltage may be 0V. A second oscillation voltage is applied to the second oscillation wiring 62, and the second oscillation voltage may be +15V. The first oscillation wiring 61 and the second oscillation wiring 62 apply a first oscillation wave to the electrophoretic ink droplets through a voltage difference. The frequency of the first oscillation wave may be 1 Hz. The first oscillation wave can oscillate the electrophoretic ink droplets to accelerate the diffusion speed of the electrophoretic ink droplets. In the second time period, a first oscillation voltage is applied to the first oscillation wiring 61, and the first oscillation voltage may be 0V. A second oscillation voltage is applied to the second oscillation wiring 62, and the second oscillation voltage may be -15V. The first oscillation wiring 61 and the second oscillation wiring 62 apply a second oscillation wave to the electrophoretic ink droplets through a voltage difference. The second oscillation wave has an opposite phase to the first oscillation wave. The frequency of the second oscillation wave may be 1 Hz. The second oscillation wave can oscillate the electrophoretic ink droplets to accelerate the diffusion speed of the electrophoretic ink droplets.

[0088] The display device of the disclosed embodiment applies the first oscillation wave and the second oscillation wave with opposite phases to the electrophoretic ink droplets through the first oscillation line 61 and the second oscillation line 62 in different time periods, thereby accelerating the diffusion speed of the electrophoretic ink droplets and ensuring that the electrophoretic layer formed by the electrophoretic ink droplets is uniform.

[0089] In an exemplary embodiment, the first substrate 100 includes a plurality of gate lines 63 extending along a first direction D1, the plurality of gate lines 63 are arranged at intervals along a second direction D2, at least some of the plurality of gate lines 63 serve as the first oscillation routing lines 61, and at least some of the plurality of gate lines 63 serve as the second oscillation routing lines 62. For example, the gate lines 63 in odd-numbered rows of the plurality of gate lines 63 serve as the first oscillation routing lines 61, and the gate lines 63 in even-numbered rows of the plurality of gate lines 63 serve as the second oscillation routing lines 62, and the first oscillation routing lines 61 are adjacent to the second oscillation routing lines 62.

[0090] In some embodiments, at least one gate line other than the first oscillation line and the second oscillation line is arranged between the first oscillation line and the second oscillation line, that is, at least one gate line other than the first oscillation line and the second oscillation line is arranged between the gate line serving as the first oscillation line and the gate line serving as the second oscillation line. For example, the gate line in the first row serves as the first oscillation line, the gate line in the third row serves as the second oscillation line, and the gate line in the second row is arranged between the first oscillation line and the second oscillation line, and neither serves as the first oscillation line or the second oscillation line. Among them, the number of gate lines other than the first oscillation line and the second oscillation line arranged between the first oscillation line and the second oscillation line can be adjusted according to the volume of the electrophoretic ink droplet. The larger the volume of the electrophoretic ink droplet, the more gate lines other than the first oscillation line and the second oscillation line are arranged between the first oscillation line and the second oscillation line.

[0091] In an exemplary embodiment, the first substrate 100 includes a plurality of data lines 64 extending along the second direction D2, the plurality of data lines 64 are arranged at intervals along the first direction D1, at least some of the plurality of data lines 64 serve as the first oscillation routing lines 61, and at least some of the plurality of data lines 64 serve as the second oscillation routing lines 62. For example, the data lines 64 in odd columns of the plurality of data lines 64 serve as the first oscillation routing lines 61, and the data lines 64 in even columns of the plurality of data lines 64 serve as the second oscillation routing lines 62, and the first oscillation routing lines 61 are adjacent to the second oscillation routing lines 62.

[0092] In some embodiments, at least one data line other than the first oscillation line and the second oscillation line is arranged between the first oscillation line and the second oscillation line, that is, at least one data line other than the first oscillation line and the second oscillation line is arranged between the data line serving as the first oscillation line and the data line serving as the second oscillation line. For example, the data line in the first column serves as the first oscillation line, the data line in the third column serves as the second oscillation line, and the data line in the second column is arranged between the first oscillation line and the second oscillation line, and neither serves as the first oscillation line or the second oscillation line. Among them, the number of data lines other than the first oscillation line and the second oscillation line arranged between the first oscillation line and the second oscillation line can be adjusted according to the volume of the electrophoretic ink droplet. The larger the volume of the electrophoretic ink droplet, the more data lines other than the first oscillation line and the second oscillation line are arranged between the first oscillation line and the second oscillation line.

[0093] In an exemplary embodiment, the first substrate 100 is provided with a first solder pad 71 and a second solder pad 72 on the side opposite to the first direction D1. The gate line 63 serving as the first oscillation line 61 is connected to the first solder pad 71 through the first connecting line 81, and the first solder pad 71 can apply a first oscillation voltage to the gate line 63 serving as the first oscillation line 61 through the first connecting line 81; the gate line 63 serving as the second oscillation line 62 is connected to the second solder pad 72 through the second connecting line 82, and the second solder pad 72 can apply a second oscillation voltage to the gate line 63 serving as the second oscillation line 62 through the second connecting line 82.

[0094] In an exemplary embodiment, the first substrate 100 is provided with a third pad 73 and a fourth pad 74 on the side opposite to the second direction D1. The data line 64 serving as the first oscillation routing 61 is connected to the third pad 73 through the third connecting routing 83, and the third pad 73 can apply a first oscillation voltage to the data line 64 serving as the first oscillation routing 61 through the third connecting routing 83; the data line 64 serving as the second oscillation routing 62 is connected to the fourth pad 74 through the fourth connecting routing 84, and the fourth pad 74 can apply a second oscillation voltage to the data line 64 serving as the second oscillation routing 62 through the fourth connecting routing 84.

[0095] In an exemplary embodiment, a cutting line 90 is provided at the edge of the first substrate 100, and a cutting line 90 is provided between the first pad 71, the second pad 72, the third pad 73, and the fourth pad 74 and the edge of the first substrate 100. When the first oscillation trace 61 and the second oscillation trace 62 apply oscillation waves to the electrophoretic ink droplets to accelerate the diffusion of the electrophoretic ink droplets to form an electrophoretic layer, the first pad 71, the second pad 72, the third pad 73, and the fourth pad 74 can be cut along the cutting line 90 by a cutting device to separate the first pad 71, the second pad 72, the third pad 73, and the fourth pad 74 from the first substrate.

[0096] The manufacturing process of the display device in the embodiment of the present disclosure includes:

[0097] Step (1): forming a driving circuit layer and a first electrode on a first substrate in sequence to form a first substrate, wherein the driving circuit layer includes a plurality of gate lines 63 extending along a first direction D1 and a plurality of data lines 64 extending along a second direction D2, the plurality of gate lines 63 are arranged at intervals along the second direction D2, the plurality of data lines 64 are arranged at intervals along the first direction D1, and the plurality of gate lines 63 and the plurality of data lines 64 are arranged to cross each other.

[0098] Step (2): connect the odd-numbered row gate lines 63 to the first pad 71 through the first connecting wire 81, so that the odd-numbered row gate lines 63 serve as the first oscillation wire 61; connect the even-numbered row gate lines 63 to the second pad 72 through the second connecting wire 82, so that the even-numbered row gate lines 63 serve as the second oscillation wire 62; connect the odd-numbered column data lines 64 to the third pad 73 through the third connecting wire 83, so that the odd-numbered column data lines 64 serve as the first oscillation wire 61; connect the even-numbered column data lines 64 to the fourth pad 74 through the fourth connecting wire 84, so that the even-numbered column data lines 64 serve as the second oscillation wire 62; then, form a rough dielectric layer on the surface of the first electrode of the first substrate through a stamping or exposure process to increase the roughness; then, form a retaining wall at the edge of the first substrate, the height of the retaining wall being substantially the same as the height of the isolation wall to be formed subsequently, and the retaining wall can prevent the electrophoretic ink droplets from overflowing, such as Fig.11 shown.

[0099] Step (3): forming a color filter structure layer and a second electrode on the second substrate in sequence to form a second substrate; then, forming an isolation wall on the second substrate by nano-imprinting or exposure process.

[0100] Step (4): drop an electrophoretic ink droplet onto the rough dielectric layer on the first substrate; then, in a first time period, apply a first oscillation voltage (e.g., 0V) to the gate line 63 as the first oscillation line 61 through the first pad 71, and apply a second oscillation voltage (e.g., +15V) to the gate line 63 as the second oscillation line 62 through the second pad 72. The first oscillation line 61 and the second oscillation line 62 apply a first oscillation wave to the electrophoretic ink droplet through a voltage difference. The frequency of the first oscillation wave can be 1 Hz. The first oscillation wave can The electrophoretic ink droplets are vibrated to speed up the diffusion of the electrophoretic ink droplets; in the second time period, a first oscillation voltage (for example, 0V) is applied to the gate line 63 as the first oscillation wiring 61 through the first pad 71, and a second oscillation voltage (for example, -15V) is applied to the gate line 63 as the second oscillation wiring 62 through the second pad 72. The first oscillation wiring 61 and the second oscillation wiring 62 apply a second oscillation wave to the electrophoretic ink droplets through a voltage difference. The frequency of the second oscillation wave can be 1 Hz, and the second oscillation wave can oscillate the electrophoretic ink droplets. , accelerating the diffusion speed of the electrophoretic ink droplets; in the third time period, a first oscillation voltage (for example, 0V) is applied to the data line 64 as the first oscillation wiring 61 through the third pad 73, and a second oscillation voltage (for example, +15V) is applied to the data line 64 as the second oscillation wiring 62 through the fourth pad 74. The first oscillation wiring 61 and the second oscillation wiring 62 apply a first oscillation wave to the electrophoretic ink droplets through a voltage difference. The frequency of the first oscillation wave can be 1 Hz. The first oscillation wave can oscillate the electrophoretic ink droplets to accelerate the diffusion speed of the electrophoretic ink droplets; in the fourth time period, a first oscillation voltage (for example, 0V) is applied to the data line 64 as the first oscillation wiring 61 through the third pad 73, and a second oscillation voltage (for example, -15V) is applied to the data line 64 as the second oscillation wiring 62 through the fourth pad 74. The first oscillation wiring 61 and the second oscillation wiring 62 apply a second oscillation wave to the electrophoretic ink droplets through a voltage difference. The frequency of the second oscillation wave can be 1 Hz. The second oscillation wave can oscillate the electrophoretic ink droplets to accelerate the diffusion speed of the electrophoretic ink droplets. At this time, the electrophoretic ink droplets spread to form a uniform electrophoretic layer.

[0101] Step (5): forming a frame glue on the second substrate.

[0102] Step (6): align the first substrate and the second substrate, and cure the frame glue by ultraviolet light and heating.

[0103] Step (7): Use a cutting device to cut along the cutting line 90 to separate the first pad 71, the second pad 72, the third pad 73 and the fourth pad 74 from the first substrate, thereby completing the preparation of the display device.

[0104] The present disclosure also provides a method for preparing a display device, comprising:

[0105] forming a first substrate and a second substrate which are opposite to each other and an electrophoretic layer which is arranged between the first substrate and the second substrate;

[0106] A rough dielectric layer is disposed on the side of the first substrate close to the electrophoretic layer. The rough dielectric layer is a lyophilic material. The roughness of the surface of the rough dielectric layer close to the electrophoretic layer is greater than the roughness of the surface of the first substrate close to the electrophoretic layer.

[0107] The present disclosure also provides a display device, which includes the aforementioned display device. The display device can be any product or component with a display function, such as a smart wearable, an outdoor billboard, a mobile phone, a tablet computer, a television, a display, a laptop computer, a digital photo frame, a navigator, etc., but the embodiments of the present invention are not limited thereto.

[0108] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0109] In addition, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first", "second", etc. may explicitly or implicitly include at least one of the features.

[0110] In the description of the present application, “plurality” means at least two, for example, two, three, etc., unless otherwise clearly and specifically defined.

[0111] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0112] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0113] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0114] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A display device, characterized in that: include: A first substrate and a second substrate arranged opposite to each other, and an electrophoretic layer arranged between the first substrate and the second substrate; The electrophoretic layer includes first electrophoretic particles and second electrophoretic particles having opposite electrical properties, wherein the first electrophoretic particles are configured to absorb visible light, and the second electrophoretic particles are configured to reflect visible light; A rough dielectric layer is provided on the side of the first substrate close to the electrophoretic layer. The rough dielectric layer is a liquid-philic material. The surface of the rough dielectric layer close to the electrophoretic layer is in contact with the electrophoretic layer. The roughness of the surface of the rough dielectric layer close to the electrophoretic layer is greater than the roughness of the surface of the first substrate close to the electrophoretic layer.

2. The display device according to claim 1, characterized in that The electrophoretic layer is an oily liquid, and the rough medium layer is an oleophilic material; or, the electrophoretic layer is an aqueous liquid, and the rough medium layer is a hydrophilic material.

3. The display device according to claim 1, characterized in that The rough dielectric layer includes a substrate and at least one protrusion, wherein the substrate is arranged on the surface of the first substrate on the side close to the electrophoretic layer, the at least one protrusion is arranged on the surface of the substrate on the side close to the electrophoretic layer, the at least one protrusion protrudes toward the electrophoretic layer, the at least one protrusion extends into the surface of the electrophoretic layer on the side close to the first substrate, and the at least one protrusion is configured to increase the roughness of the surface of the rough dielectric layer on the side close to the electrophoretic layer.

4. The display device according to claim 3, characterized in that The at least one protrusion is in a cone or triangular pyramid shape.

5. The display device according to claim 3, characterized in that: The height of the at least one protrusion is greater than or equal to 0.5 micrometers and less than or equal to 3 micrometers, and the height of the protrusion is the maximum dimension of the protrusion in a direction perpendicular to the plane where the display device is located.

6. The display device according to claim 3, characterized in that: At least two protrusions in the rough dielectric layer have different heights; or, all protrusions in the rough dielectric layer have substantially the same height, and the height of the protrusion is the maximum dimension of the protrusion in a direction perpendicular to the plane where the display device is located.

7. The display device according to claim 3, characterized in that: The protrusions in the rough dielectric layer are arranged along a first direction to form a protrusion row, and the protrusion rows are arranged in sequence along a second direction to form a protrusion array, the outer contours of the orthographic projections of adjacent protrusions in the protrusion row on the plane where the display device is located are in contact with each other, and the outer contour of the orthographic projection of one protrusion in the protrusion row on the plane where the display device is located is in contact with the outer contour of the orthographic projection of a corresponding protrusion in an adjacent protrusion row on the plane where the display device is located; And / or, the protrusions in the rough medium layer are arranged along a first direction to form a first protrusion row and a second protrusion row, the first protrusion row and the second protrusion row are arranged alternately along a second direction to form a protrusion array, the outer contour of the orthographic projection of one protrusion in the first protrusion row on the plane where the display device is located contacts the outer contours of the orthographic projections of corresponding two protrusions in the adjacent second protrusion row on the plane where the display device is located, and the first direction and the second direction intersect each other.

8. The display device according to any one of claims 1 to 7, characterized in that: The first substrate includes a first oscillation line and a second oscillation line spaced apart in a direction parallel to the plane where the display device is located, the orthographic projections of the first oscillation line and the second oscillation line on the plane where the display device is located overlap with the orthographic projections of electrophoretic ink droplets used to form the electrophoretic layer on the plane where the display device is located, the first oscillation line is configured to apply a first oscillation voltage, and the second oscillation line is configured to apply a second oscillation voltage, the first oscillation voltage is different from the second oscillation voltage, and the first oscillation line and the second oscillation line apply oscillation waves to the electrophoretic ink droplets through a voltage difference.

9. The display device according to claim 8, characterized in that: In a first time period, the first oscillation line and the second oscillation line apply a first oscillation wave to the electrophoretic ink droplet through a voltage difference; in a second time period, the first oscillation line and the second oscillation line apply a second oscillation wave to the electrophoretic ink droplet through a voltage difference, and the first oscillation wave and the second oscillation wave have opposite phases.

10. The display device according to claim 8, characterized in that: The first substrate includes a plurality of data lines extending along the second direction, the plurality of data lines are arranged at intervals along the first direction, at least some of the plurality of data lines serve as the first oscillation routing line and the second oscillation routing line, and the first oscillation routing line is adjacent to the second oscillation routing line; and / or, at least one data line other than the first oscillation routing line and the second oscillation routing line is arranged between the first oscillation routing line and the second oscillation routing line, and the first direction and the second direction intersect with each other.

11. The display device according to claim 8, characterized in that The first substrate includes a plurality of gate lines extending along a first direction, the plurality of gate lines are arranged at intervals along a second direction, at least some of the plurality of gate lines serve as the first oscillation routing and the second oscillation routing, and the first oscillation routing is adjacent to the second oscillation routing; and / or, at least one gate line other than the first oscillation routing and the second oscillation routing is arranged between the first oscillation routing and the second oscillation routing, and the first direction and the second direction intersect with each other.

12. The display device according to any one of claims 1 to 7, characterized in that: It also includes an isolation wall, which is arranged between the first substrate and the second substrate. The isolation wall separates the electrophoretic layer to form a plurality of electrophoretic units. The orthographic projection of the surface of the isolation wall close to the first substrate on the plane where the display device is located does not overlap with the orthographic projection of the rough medium layer on the plane where the display device is located.

13. The display device according to any one of claims 1 to 7, characterized in that: The first substrate includes a first base, a driving circuit layer arranged on the side of the first base close to the electrophoretic layer, and a first electrode arranged on the side of the driving circuit layer close to the electrophoretic layer; the rough medium layer is arranged on the surface of the first electrode close to the electrophoretic layer; the second substrate includes a second base, a color film structure layer arranged on the side of the second base close to the electrophoretic layer, and a second electrode arranged on the side of the color film structure layer close to the electrophoretic layer.

Images