Electronic paper display panel, preparation method thereof and display device

Abstract

The application discloses an electronic paper display panel and a preparation method and a display device thereof, and mainly relates to the technical field of display. The array substrate comprises a substrate and pixel units arranged on the substrate. The pixel units comprise connected active switches and pixel electrodes. The pixel units comprise a first region and a second region. In the first region, the distance between the pixel electrode and the common electrode layer is d1. In the second region, the distance between the pixel electrode and the common electrode layer is d2. d1 is greater than d2. The electronic paper film piece comprises first microcapsules and second microcapsules. The first microcapsules are located in the first region, and the second microcapsules are located in the second region. The diameter of the first microcapsules is smaller than that of the second microcapsules, and the first microcapsules are located on the side close to the common electrode layer. Through the above design, the uniformity of the refresh speed of the electronic paper film piece is improved, and the display effect of the electronic paper display panel is improved.

Description

Technical Field

[0001] This application relates to the field of display technology, and in particular to an electronic paper display panel, its preparation method, and a display device. Background Technology

[0002] Electronic paper technology is widely used in e-book readers, electronic tags, smart wearables and other fields. In recent years, with the continuous evolution of electronic paper technology, its application scenarios have continued to expand.

[0003] The distance between the pixel electrodes and the common electrode in current electronic paper display panels is not uniform, which leads to differences in the electric field intensity driving the electrophoretic particles in different areas. This results in poor uniformity of the refresh rate of the electronic paper film and uneven display effect of the electronic paper display panel. Summary of the Invention

[0004] The purpose of this application is to provide an electronic paper display panel and its preparation method and display device, which improves the uniformity of the refresh rate of the electronic paper film and enhances the display effect of the electronic paper display panel.

[0005] This application discloses an electronic paper display panel, which includes an array substrate, an electronic paper film, and a common electrode layer. The electronic paper film is disposed on the array substrate, and the common electrode layer is disposed on the side of the electronic paper film facing away from the array substrate.

[0006] The array substrate includes a substrate and a pixel unit disposed on the substrate. The pixel unit includes a connected active switch and a pixel electrode. The pixel unit includes a first region and a second region. In the first region, the distance between the pixel electrode and the common electrode layer is d1. In the second region, the distance between the pixel electrode and the common electrode layer is d2. d1 is greater than d2.

[0007] The electronic paper film includes a first microcapsule and a second microcapsule. The first microcapsule is located in the first region, and the second microcapsule is located in the second region. The diameter of the first microcapsule is smaller than the diameter of the second microcapsule, and the first microcapsule is located on the side closer to the common electrode layer.

[0008] Optionally, a first insulating composite layer is provided between the drain of the active switch and the pixel electrode, and a connection via is provided on the pixel unit. The connection via penetrates the first insulating composite layer, and the pixel electrode is connected to the drain of the active switch through the connection via. The area where the connection via is located forms the first area.

[0009] Optionally, the pixel unit further includes a common electrode block, a storage capacitor is formed between the common electrode block and the pixel electrode, and a second insulating composite layer and a third insulating composite layer are formed between the common electrode block and the pixel electrode, wherein the third insulating composite layer is located on the side of the second insulating composite layer opposite to the common electrode block;

[0010] The pixel unit is provided with a capacitor enhancement groove, which penetrates the third insulating composite layer. At least a portion of the pixel electrode is located within the capacitor enhancement groove, and the area where the capacitor enhancement groove is located forms the first region.

[0011] Optionally, the pixel unit further includes a third region, in which the distance between the pixel electrode and the common electrode layer is d3, and the distance between the pixel electrode and the common electrode layer in the third region is d3, wherein d3 is greater than d2;

[0012] The electronic paper film also includes a third microcapsule located in the third region. The diameter of the third microcapsule is smaller than that of the second microcapsule, and the third microcapsule is also located on the side close to the common electrode layer.

[0013] The pixel unit further includes a common electrode block, a storage capacitor is formed between the common electrode block and the pixel electrode, and a second insulating composite layer and a third insulating composite layer are formed between the common electrode block and the pixel electrode, with the third insulating composite layer located on the side of the second insulating composite layer away from the common electrode block;

[0014] The pixel unit is provided with a capacitor enhancement groove, which penetrates the third insulating composite layer. At least a portion of the pixel electrode is located within the capacitor enhancement groove, and the area where the capacitor enhancement groove is located forms the third region.

[0015] Optionally, the electronic paper film further includes a base layer and a first padding layer, wherein the first padding layer is disposed on the base layer and the first microcapsule is disposed on the first padding layer.

[0016] Optionally, the electronic paper film further includes a base layer, a first padding layer, and a second padding layer, both of which are disposed on the base layer, and the first microcapsule is disposed on the first padding layer, and the third microcapsule is disposed on the second padding layer.

[0017] Optionally, the electronic paper film further includes a first barrier wall disposed on the first pad layer, the first barrier wall being used to abut against the outer wall of the first microcapsule.

[0018] Optionally, the diameter of the electrophoretic particles in the first microcapsule is smaller than the diameter of the electrophoretic particles in the second microcapsule.

[0019] This application also discloses a method for preparing an electronic paper display panel. The method includes the following steps:

[0020] An active switch and a pixel electrode are disposed on a substrate to form an array substrate, wherein the pixel unit includes a first region and a second region. In the first region, the distance between the pixel electrode and the common electrode layer is d1, and in the second region, the distance between the pixel electrode and the common electrode layer is d2, where d1 is greater than d2.

[0021] An electronic paper film and a common electrode layer are formed on the array substrate. The electronic paper film includes a first microcapsule and a second microcapsule. The first microcapsule is located in the first region, and the second microcapsule is located in the second region. The diameter of the first microcapsule is smaller than the diameter of the second microcapsule, and the first microcapsule is located on the side closer to the common electrode layer.

[0022] This application also discloses a display device, which includes a driving circuit and an electronic paper display panel, wherein the driving circuit is connected to the electronic paper display panel.

[0023] Compared to existing electronic paper display panel solutions, the electronic paper display panel of this application has the following advantages: in the first region, the distance between the pixel electrode and the common electrode layer is d1, and in the second region, the distance is d2, since d1 is greater than d2. Therefore, by setting a first microcapsule in the first region and a second microcapsule in the second region, and setting the diameter of the first microcapsule to be smaller than that of the second microcapsule, and placing the first microcapsule on the side closer to the common electrode layer, the electrophoretic particles in the first microcapsule in the first region do not need to travel a large distance to reach the target position, thereby improving the uniformity of the refresh rate of the electronic paper film and enhancing the display effect of the electronic paper display panel. Attached Figure Description

[0024] The accompanying drawings, which form part of the specification, are used to provide a further understanding of the embodiments of this application and illustrate the implementation methods of this application, together with the textual description, to explain the principles of this application. Obviously, the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any creative effort. In the drawings:

[0025] Figure 1 This is a schematic diagram of a display device according to an embodiment of this application;

[0026] Figure 2 This is a schematic diagram of a display device according to the first embodiment of this application;

[0027] Figure 3 This is a schematic diagram of the top grid active switch according to the first embodiment of this application;

[0028] Figure 4 This is a schematic diagram of the third region of the first embodiment of this application;

[0029] Figure 5 This is a schematic diagram of the first and second padding layers according to the first embodiment of this application;

[0030] Figure 6 This is a schematic diagram of a magnetic structure according to the first embodiment of this application;

[0031] Figure 7 This is a schematic flowchart of a method for preparing an electronic paper display panel according to an embodiment of this application;

[0032] Figure 8 This is a process diagram illustrating a method for manufacturing an electronic paper display panel according to an embodiment of this application;

[0033] Figure 9 This is a schematic diagram of an electronic paper display panel according to a second embodiment of this application.

[0034] Among them, 10 is a display device; 20 is a driving circuit; 30 is an electronic paper display panel; 100 is an array substrate; 110 is a substrate; 200 is a pixel unit; 210 is an active switch; 220 is a pixel electrode; 230 is a common electrode block; 241 is a first metal layer; 242 is a first insulating layer; 243 is a second metal layer; 244 is a second insulating layer; 245 is a passivation layer; 300 is an electronic paper film; 310 is a first microcapsule; 320 is a second microcapsule; 330 is a third... Microcapsule; 341, base layer; 342, first padding layer; 343, second padding layer; 351, first barrier wall; 352, second barrier wall; 400, common electrode layer; 510, first region; 520, second region; 530, third region; 610, connecting via; 620, capacitor enhancement groove; 710, first insulating composite layer; 720, second insulating composite layer; 730, third insulating composite layer; 810, first magnetic structure; 820, second magnetic structure. Detailed Implementation

[0035] It should be understood that the terminology, specific structural and functional details used herein are merely for describing particular embodiments and are representative. However, this application may be implemented in many alternative forms and should not be construed as being limited to the embodiments set forth herein.

[0036] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating relative importance or implying the number of technical features indicated. Therefore, unless otherwise stated, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature; "multiple" means two or more. The term "comprising" and any variations thereof mean non-exclusive inclusion, where one or more other features, integers, steps, operations, units, components, and / or combinations thereof may be present or added.

[0037] In addition, terms such as “center,” “horizontal,” “up,” “down,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer” that indicate orientation or positional relationship are based on the orientation or relative positional relationship shown in the accompanying drawings. They are only for the purpose of simplifying the description of this application and do not indicate that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0038] Furthermore, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0039] The present application will now be described in detail with reference to the accompanying drawings and optional embodiments.

[0040] Figure 1 This is a schematic diagram of a display device according to an embodiment of this application, as shown below. Figure 1 As shown, this application discloses a display device 10, which includes a driving circuit 20 and an electronic paper display panel 30. The driving circuit 20 is connected to the electronic paper display panel 30 and transmits a driving voltage to the electronic paper display panel 30 to control the electronic paper display panel 30 to display an image.

[0041] This application also discloses an electronic paper display panel 30, which can be used in the display device 10 described above. Regarding the electronic paper display panel 30, this application provides the following design, which is specifically described through several embodiments:

[0042] Example 1:

[0043] Figure 2 This is a schematic diagram of a display device according to the first embodiment of this application, as shown below. Figure 1 As shown, this application discloses an electronic paper display panel 30, which includes an array substrate 100, an electronic paper film 300, and a common electrode layer 400. The electronic paper film 300 is disposed on the array substrate 100, and the common electrode layer 400 is disposed on the side of the electronic paper film 300 facing away from the array substrate 100.

[0044] The array substrate 100 includes a substrate 110 and a pixel unit 200 disposed on the substrate 110. The pixel unit 200 includes an active switch 210 and a pixel electrode 220 connected to each other. The pixel unit 200 includes a first region 510 and a second region 520. In other words, the region where the pixel unit 200 is located is divided into a first region 510 and a second region 520. Of course, it can also be divided into more regions.

[0045] Within the first region 510, the distance between the pixel electrode 220 and the common electrode layer 400 is d1, and within the second region 520, the distance between the pixel electrode 220 and the common electrode layer 400 is d2, wherein d1 is greater than d2.

[0046] The electronic paper film 300 includes a first microcapsule 310 and a second microcapsule 320. The first microcapsule 310 is located in the first region 510, and the second microcapsule 320 is located in the second region 520. The diameter of the first microcapsule 310 is smaller than the diameter of the second microcapsule 320, and the first microcapsule 310 is located on the side close to the common electrode layer 400.

[0047] The microcapsules are generally spherical in shape. When the microcapsules are of other shapes, the diameter of the first microcapsule 310 can also represent the thickness of the first microcapsule 310 along the direction of the array substrate 100 toward the common electrode layer 400. The diameter of the second microcapsule 320 can also represent the thickness of the first microcapsule 310 along the direction of the array substrate 100 toward the common electrode layer 400.

[0048] It is understood that the area above the first region 510 corresponding to the pixel electrode 220, although not in direct contact with the pixel electrode 220, should also be considered within the first region 510 of the pixel electrode 220; and the area above the second region 520 corresponding to the pixel electrode 220, although not in direct contact with the pixel electrode 220, should also be considered within the second region 520 of the pixel electrode 220.

[0049] Furthermore, the first microcapsule 310 being located within the first region 510 means that the first microcapsule 310 is completely located within the first region 510. Of course, any part of the first microcapsule 310 that extends beyond the first region 510 should also be considered as the first microcapsule 310 being located within the first region 510.

[0050] Furthermore, the fact that the second microcapsule 320 is located within the second region 520 means that the second microcapsule 320 is completely located within the second region 520. Of course, any part of the second microcapsule 320 that extends beyond the second region 520 should also be considered as the second microcapsule 320 being located within the second region 520.

[0051] Compared to existing electronic paper display panel solutions, the electronic paper display panel 30 of this application has a distance of d1 between the pixel electrode 220 and the common electrode layer 400 in the first region 510 and d2 between the pixel electrode 220 and the common electrode layer 400 in the second region 520, where d1 is greater than d2.

[0052] Therefore, by setting a first microcapsule 310 in the first region 510 and a second microcapsule 320 in the second region 520, the diameter of the first microcapsule 310 is smaller than the diameter of the second microcapsule 320, and the first microcapsule 310 is located on the side close to the common electrode layer 400, since the diameter of the first microcapsule 310 in the first region 510 is smaller than the diameter of the second microcapsule 320 in the second region 520, the electrophoretic particles in the first microcapsule 310 in the first region 510 do not need to travel a large distance to reach the target position.

[0053] In this way, even if the electric field force in the first region 510 is less than that in the second region 520, the refresh rate of the electrophoretic particles in the first microcapsule 310 in the first region 510 and the electrophoretic particles in the second microcapsule 320 in the second region 520 can be made closer, thereby improving the uniformity of the refresh rate of the electronic paper film 300 and improving the display effect of the electronic paper display panel 30.

[0054] Figure 3 This is a schematic diagram of the top grid active switch according to the first embodiment of this application, combined with... Figure 2 and Figure 3As shown, in this embodiment, a first insulating composite layer 710 is provided between the drain of the active switch 210 and the pixel electrode 220. A connection via 610 is provided on the pixel unit 200. The connection via 610 penetrates the first insulating composite layer 710. The pixel electrode 220 is connected to the drain of the active switch 210 through the connection via 610. The area where the connection via 610 is located forms the first area 510.

[0055] The connection via 610 penetrates the first insulating composite layer 710, thereby exposing the drain of the active switch 210. When the pixel electrode 220 is formed, part of the pixel electrode 220 will fall into the connection via 610 to achieve the connection between the pixel electrode 220 and the drain of the active switch 210. Since part of the pixel electrode 220 falls into the connection via 610, the distance between the pixel electrode 220 and the common electrode at the location of the connection via 610 becomes larger, thereby causing the electric field force at that location to become smaller.

[0056] In this embodiment, the area where the connecting via 610 is located is defined as the first area 510, and the area outside the connecting via 610 is defined as the second area 520.

[0057] And see Figure 2 When the active switch 210 is a bottom-gate active switch 210, the gate of the active switch 210 is in the first metal layer 241, the source and drain of the active switch 210 are in the second metal layer 243, a first insulating layer 242 is disposed between the first metal layer 241 and the second metal layer 243, and a semiconductor layer is disposed between the source and drain and the first insulating layer 242. At this time, the first insulating composite layer 710 includes a second insulating layer 244 and a passivation layer 245.

[0058] See Figure 3 When the active switch 210 is a top-gate active switch 210, the gate of the active switch 210 is in the second metal layer 243, the source and drain of the active switch 210 are in the first metal layer 241, a first insulating layer 242 is disposed between the first metal layer 241 and the second metal layer 243, and the semiconductor layer is between the source and drain and the substrate 110. In this case, the first insulating composite layer 710 includes the first insulating layer 242, the second insulating layer 244 and the passivation layer 245.

[0059] For ease of explanation, this application takes the active switch 210 as a bottom-grid type active switch 210 as an example.

[0060] Figure 4 This is a schematic diagram of the third region of the first embodiment of this application, in conjunction with... Figure 4As shown, in the electronic paper display panel 30, a large storage capacitor is required to drive the electrophoretic particles in the microcapsules to move. Therefore, a common electrode block 230 is provided. The common electrode block 230 is connected to the common electrode layer 400. In this way, a storage capacitor is formed between the pixel electrode 220 and the common electrode. Then, a storage capacitor can also be formed between the pixel electrode 220 and the common electrode block 230, so that there is enough storage capacitor to drive the electrophoretic particles in the microcapsules to move to the target position.

[0061] When the common electrode block 230 is located in the first metal layer 241, the pixel electrode 220 and the common electrode block 230 are separated by a first insulating layer 242, a second insulating layer 244 and a passivation layer 245.

[0062] When the common electrode block 230 is located in the second metal layer 243, the pixel electrode 220 and the common electrode block 230 are separated by a second insulating layer 244 and a passivation layer 245. Since the passivation layer 245 has a large thickness, generally 1mm-3mm, the storage capacitance between the pixel electrode 220 and the common electrode block 230 is small, which is not conducive to the movement of electrophoretic particles in the microcapsule. Therefore, this application provides a capacitance enhancement groove 620 on the passivation layer 245 to reduce the distance between the pixel electrode 220 and the common electrode block 230.

[0063] Specifically, in this embodiment, the pixel unit 200 further includes a third region 530, in which the distance between the pixel electrode 220 and the common electrode layer 400 is d3, and the distance between the pixel electrode 220 and the common electrode layer 400 is d3, wherein d3 is greater than d2.

[0064] The electronic paper film 300 also includes a third microcapsule 330, which is located within the third region 530. The diameter of the third microcapsule 330 is smaller than that of the second microcapsule 320, and the third microcapsule 330 is also located on the side close to the common electrode layer 400.

[0065] The pixel unit 200 further includes a common electrode block 230, a storage capacitor is formed between the common electrode block 230 and the pixel electrode 220, and a second insulating composite layer 720 and a third insulating composite layer 730 are formed between the common electrode block 230 and the pixel electrode 220, with the third insulating composite layer 730 located on the side of the second insulating composite layer 720 away from the common electrode block 230.

[0066] The pixel unit 200 is provided with a capacitor enhancement groove 620, which penetrates the third insulating composite layer 730. At least a portion of the pixel electrode 220 is located within the capacitor enhancement groove 620, and the area where the capacitor enhancement groove 620 is located forms the third region 530.

[0067] In simple terms, this application provides a connection via 610 and a capacitor enhancement groove 620 on the array substrate 100. The positions of the connection via 610 and the capacitor enhancement groove 620 both result in an increased distance between the pixel electrode 220 and the common electrode layer 400. Therefore, a first microcapsule 310 is provided in the first region 510 corresponding to the connection via 610 in the electronic paper film 300, and a third microcapsule 330 is provided in the third region 530 corresponding to the capacitor enhancement groove 620. The diameters of the first microcapsule 310 and the third microcapsule 330 are both smaller than the diameter of the second microcapsule 320.

[0068] Even if the electric field force in the first region 510 is less than that in the second region 520, and the electric field force in the third region 530 is less than that in the second region 520, the refresh rates of the electrophoretic particles in the first microcapsule 310 in the first region 510, the electrophoretic particles in the second microcapsule 320 in the second region 520, and the electrophoretic particles in the third microcapsule 330 in the third region 530 can be made closer, thereby improving the uniformity of the refresh rate of the electronic paper film 300 and improving the display effect of the electronic paper display panel 30.

[0069] For example, the common electrode block 230 is located in the first metal layer 241, and the capacitor enhancement groove 620 penetrates the third insulating composite layer 730. The third insulating composite layer 730 includes a passivation layer 245, and the second insulating composite layer 720 includes a first insulating layer 242 and a second insulating layer 244. In this case, d1 is greater than d3, and the diameter of the first microcapsule 310 is smaller than the diameter of the third microcapsule 330.

[0070] For example, the common electrode block 230 is located in the second metal layer 243, the capacitor enhancement groove 620 penetrates the third insulating composite layer 730 including a passivation layer 245, and the second insulating composite layer 720 includes a first insulating layer 242 and a second insulating layer 244. In this case, d1 is greater than d3, and the diameter of the first microcapsule 310 is smaller than the diameter of the third microcapsule 330.

[0071] For example, when the active switch 210 is a bottom-gate type active switch 210, the common electrode block 230 is located in the first metal layer 241, and the capacitor enhancement groove 620 penetrates the third insulating composite layer 730. The third insulating composite layer 730 includes a passivation layer 245 and a second insulating layer 244, while the second insulating composite layer 720 includes a first insulating layer 242. In this case, d1 is less than d3, and the diameter of the first microcapsule 310 is greater than the diameter of the third microcapsule 330.

[0072] Correspondingly, when the active switch 210 is a top-gate type active switch 210, d1 is greater than d3, and the diameter of the first microcapsule 310 is smaller than the diameter of the third microcapsule 330.

[0073] For ease of explanation, this application uses the example where the common electrode block 230 is located in the first metal layer 241, the capacitor enhancement groove 620 penetrates the third insulating composite layer 730, the third insulating composite layer 730 includes a passivation layer 245, and the second insulating composite layer 720 includes a first insulating layer 242 and a second insulating layer 244. In this case, d1 is greater than d3, and the diameter of the first microcapsule 310 is smaller than the diameter of the third microcapsule 330.

[0074] Figure 5 This is a schematic diagram of the first and second shim layers according to the first embodiment of this application, in conjunction with... Figure 5 As shown, in order to allow the first microcapsule 310 and the third microcapsule 330 to be close to the common electrode layer 400, this application can elevate them by setting a first padding layer 342 and a second padding layer 343. Specifically, the electronic paper film 300 also includes a base layer 341, a first padding layer 342 and a second padding layer 343. The first padding layer 342 and the second padding layer 343 are both disposed on the base layer 341, and the first microcapsule 310 is disposed on the first padding layer 342, and the third microcapsule 330 is disposed on the second padding layer 343.

[0075] For example, when d1 is greater than d3, the height of the first padding layer 342 is greater than the height of the second padding layer 343. In other words, the distance between the top of the first padding layer 342 and the common electrode layer 400 is less than the distance between the top of the second padding layer 343 and the common electrode layer 400, thereby balancing the refresh rates of the electrophoretic particles in the first microcapsule 310 and the electrophoretic particles in the third microcapsule 330.

[0076] For example, when d1 is less than d3, the height of the first padding layer 342 is less than the height of the second padding layer 343. In other words, the distance between the top of the first padding layer 342 and the common electrode layer 400 is greater than the distance between the top of the second padding layer 343 and the common electrode layer 400.

[0077] Furthermore, the electronic paper film 300 also includes a first barrier wall 351, which is disposed on the first pad layer 342 and is used to abut against the outer wall of the first microcapsule 310.

[0078] The electronic paper film 300 also includes a second set of barriers, the second barrier 352 being disposed on the second padding layer 343, and the second barrier 352 being used to abut against the outer wall of the third microcapsule 330.

[0079] By setting the first barrier wall 351, the first microcapsule 310 can be prevented from moving into the second region 520, and by setting the second barrier wall 352, the third microcapsule 330 can be prevented from moving into the second region 520.

[0080] For example, the first barrier wall 351 surrounds the edge of the first region 510, and the second barrier wall 352 surrounds the edge of the third region 530.

[0081] Furthermore, when displaying a single color, for example, using electrophoretic particles within the microcapsules including black and white electrophoretic particles, where the white particles are negatively charged and the black particles are positively charged, when displaying white, the white electrophoretic particles in the first region 510, the second region 520, and the third region 530 all move upwards, while the black electrophoretic particles move downwards. Since the diameter of the first microcapsule 310 in the first region 510 is smaller than the diameter of the second microcapsule 320 in the second region 520, and the diameter of the third microcapsule 330 in the third region 530 is smaller than the diameter of the second microcapsule 320 in the second region 520, the positively charged particles in the first microcapsule 310 are positioned between the negatively charged and positively charged particles in the second microcapsule 320, causing the positively charged particles in the first microcapsule 310 to pull on the negatively charged particles in the second microcapsule 320; similarly, the positively charged particles in the third microcapsule 330 are positioned between the negatively charged and positively charged particles in the second microcapsule 320, causing the positively charged particles in the third microcapsule 330 to pull on the negatively charged particles in the second microcapsule 320.

[0082] Therefore, this application uses a shielding material to prepare the first barrier wall 351 and the second barrier wall 352, such as a metal material. The thickness of the first barrier wall 351 is equal to the diameter of the first microcapsule 310, and the thickness of the second barrier wall 352 is equal to the diameter of the third microcapsule 330. In this way, the first barrier wall 351 will play a shielding role between the positively charged particles in the first microcapsule 310 and the negatively charged particles in the second microcapsule 320, but will not play a shielding role between the positively charged particles in the first microcapsule 310 and the positively charged particles in the second microcapsule 320.

[0083] Furthermore, the diameter of the electrophoretic particles within the first microcapsule 310 is smaller than the diameter of the electrophoretic particles within the second microcapsule 320. Specifically:

[0084] Because the electrophoretic particles move within the microcapsules, they are hindered by the solution inside the microcapsules. The smaller the diameter of the electrophoretic particles, the less resistance the solution exerts on them. Therefore, since the diameter of the electrophoretic particles in the first microcapsule 310 is smaller than that in the second microcapsule 320, even if the electric field force in the first region 510 is less than that in the second region 520, the refresh rates of the electrophoretic particles in the first microcapsule 310 in the first region 510 and the electrophoretic particles in the second microcapsule 320 in the second region 520 can be made closer. This further improves the uniformity of the refresh rate of the electronic paper film 300 and enhances the display effect of the electronic paper display panel 30.

[0085] For example, when the third microcapsule 330 is included, the diameter of the electrophoretic particles in the third microcapsule 330 is smaller than the diameter of the electrophoretic particles in the second microcapsule 320. The principle is the same as above and will not be repeated here.

[0086] Figure 6 This is a schematic diagram of a magnetic structure according to the first embodiment of this application, combined with... Figure 6 As shown, in order to allow the first microcapsule 310 and the third microcapsule 330 to approach the common electrode layer 400, this application can use a magnetic attraction method, specifically:

[0087] Both the first microcapsule 310 and the third microcapsule 330 are made of materials comprising magnetic Fe3O4 nanoparticles doped into the capsule wall. The electronic paper display panel 30 includes a first magnetic structure 810, which is disposed on the side of the first microcapsule 310 and the third microcapsule 330 facing away from the array substrate 100. The first microcapsule 310 attracts the first magnetic structure 810, the third microcapsule 330, and the first magnetic structure 810. For example, the first magnetic structure 810 can be disposed on the side of the common electrode layer 400 facing away from the electronic paper film 300.

[0088] The material of the first magnetic structure 810 includes Nd-Fe-B permanent magnet material, which can be prepared by chemical vapor deposition.

[0089] Figure 7 This is a schematic flowchart of a method for manufacturing an electronic paper display panel according to an embodiment of this application. Figure 8 This is a schematic diagram of the manufacturing process of an electronic paper display panel according to an embodiment of this application, combined with... Figure 7 and Figure 8 As shown, this application also discloses a method for preparing an electronic paper display panel 30. The method for preparing the electronic paper display panel 30 includes the following steps:

[0090] S1: An active switch and a pixel electrode are disposed on a substrate to form an array substrate, wherein the pixel unit includes a first region and a second region. In the first region, the distance between the pixel electrode and the common electrode layer is d1, and in the second region, the distance between the pixel electrode and the common electrode layer is d2, where d1 is greater than d2.

[0091] S2: An electronic paper film and a common electrode layer are formed on the array substrate, wherein the electronic paper film includes a first microcapsule and a second microcapsule, the first microcapsule is located in the first region, the second microcapsule is located in the second region, the diameter of the first microcapsule is smaller than the diameter of the second microcapsule, and the first microcapsule is located on the side closer to the common electrode layer.

[0092] The electronic paper film 300 and the common electrode layer 400 can be prepared separately and then attached to the array substrate 100. Alternatively, the electronic paper film 300 and the common electrode layer 400 can be prepared directly on the array substrate 100.

[0093] In the electronic paper display panel 30 of this application, the distance between the pixel electrode 220 and the common electrode layer 400 is d1 in the first region 510 and d2 in the second region 520, where d1 is greater than d2.

[0094] Then, by setting a first microcapsule 310 in the first region 510 and a second microcapsule 320 in the second region 520, the diameter of the first microcapsule 310 is smaller than the diameter of the second microcapsule 320, and the first microcapsule 310 is located on the side close to the common electrode layer 400, since the diameter of the first microcapsule 310 in the first region 510 is smaller than the diameter of the second microcapsule 320 in the second region 520, the electrophoretic particles in the first microcapsule 310 in the first region 510 do not need to travel a large distance to reach the target position.

[0095] In this way, even if the electric field force in the first region 510 is less than that in the second region 520, the refresh rate of the electrophoretic particles in the first microcapsule 310 in the first region 510 and the electrophoretic particles in the second microcapsule 320 in the second region 520 can be made closer, thereby improving the uniformity of the refresh rate of the electronic paper film 300 and improving the display effect of the electronic paper display panel 30.

[0096] Example 2:

[0097] Figure 9 This is a schematic diagram of an electronic paper display panel according to a second embodiment of this application, as shown below. Figure 9 As shown, unlike the first embodiment, in this embodiment, the first region 510 is formed in the area where the capacitor enhancement groove 620 is located. That is, the pixel unit 200 also includes a common electrode block 230. A storage capacitor is formed between the common electrode block 230 and the pixel electrode 220. A second insulating composite layer 720 and a third insulating composite layer 730 are formed between the common electrode block 230 and the pixel electrode 220. The third insulating composite layer 730 is located on the side of the second insulating composite layer 720 away from the common electrode block 230.

[0098] The pixel unit 200 is provided with a capacitor enhancement groove 620, which penetrates the third insulating composite layer 730. At least a portion of the pixel electrode 220 is located within the capacitor enhancement groove 620, and the area where the capacitor enhancement groove 620 is located forms the first region 510.

[0099] Compared to the solution in the first embodiment, this embodiment forms the first region 510 only in the area where the capacitor enhancement groove 620 is located. This way, only the first microcapsule 310 and the second microcapsule 320 need to be set, making the preparation simpler.

[0100] It should be noted that the limitations on each step involved in this solution are not considered as limiting the order of steps, provided that they do not affect the implementation of the specific solution. The steps listed first can be executed first, later, or even simultaneously. As long as this solution can be implemented, it should be considered to fall within the scope of protection of this application.

[0101] It should be noted that the inventive concept of this application can form many embodiments, but due to the limited space of the application documents, they cannot all be listed. Therefore, without conflict, the embodiments described above or the technical features can be arbitrarily combined to form new embodiments. After the embodiments or technical features are combined, the original technical effect will be enhanced.

[0102] The above description, in conjunction with specific optional embodiments, provides a further detailed explanation of this application and should not be construed as limiting the specific implementation of this application to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of this application, and all such modifications or substitutions should be considered within the scope of protection of this application.

Claims

1. An electronic paper display panel, characterized in that, The electronic paper display panel includes an array substrate, an electronic paper film, and a common electrode layer. The electronic paper film is disposed on the array substrate, and the common electrode layer is disposed on the side of the electronic paper film facing away from the array substrate. The array substrate includes a substrate and a pixel unit disposed on the substrate. The pixel unit includes a connected active switch and a pixel electrode. The pixel unit includes a first region and a second region. In the first region, the distance between the pixel electrode and the common electrode layer is d1. In the second region, the distance between the pixel electrode and the common electrode layer is d2. d1 is greater than d2. The electronic paper film includes a first microcapsule and a second microcapsule. The first microcapsule is located in the first region, and the second microcapsule is located in the second region. The diameter of the first microcapsule is smaller than the diameter of the second microcapsule, and the first microcapsule is located on the side closer to the common electrode layer.

2. The electronic paper display panel according to claim 1, characterized in that, A first insulating composite layer is provided between the drain of the active switch and the pixel electrode. A connection via is provided on the pixel unit. The connection via penetrates the first insulating composite layer. The pixel electrode is connected to the drain of the active switch through the connection via. The area where the connection via is located forms the first area.

3. The electronic paper display panel according to claim 1, characterized in that, The pixel unit further includes a common electrode block, a storage capacitor is formed between the common electrode block and the pixel electrode, and a second insulating composite layer and a third insulating composite layer are formed between the common electrode block and the pixel electrode, with the third insulating composite layer located on the side of the second insulating composite layer away from the common electrode block; The pixel unit is provided with a capacitor enhancement groove, which penetrates the third insulating composite layer. At least a portion of the pixel electrode is located within the capacitor enhancement groove, and the area where the capacitor enhancement groove is located forms the first region.

4. The electronic paper display panel according to claim 2, characterized in that, The pixel unit further includes a third region, in which the distance between the pixel electrode and the common electrode layer is d3, and the distance between the pixel electrode and the common electrode layer in the third region is d3, wherein d3 is greater than d2; The electronic paper film also includes a third microcapsule located in the third region. The diameter of the third microcapsule is smaller than that of the second microcapsule, and the third microcapsule is also located on the side close to the common electrode layer. The pixel unit further includes a common electrode block, a storage capacitor is formed between the common electrode block and the pixel electrode, and a second insulating composite layer and a third insulating composite layer are formed between the common electrode block and the pixel electrode, with the third insulating composite layer located on the side of the second insulating composite layer away from the common electrode block; The pixel unit is provided with a capacitor enhancement groove, which penetrates the third insulating composite layer. At least a portion of the pixel electrode is located within the capacitor enhancement groove, and the area where the capacitor enhancement groove is located forms the third region.

5. The electronic paper display panel according to any one of claims 2 and 3, characterized in that, The electronic paper film further includes a base layer and a first padding layer, wherein the first padding layer is disposed on the base layer and the first microcapsule is disposed on the first padding layer.

6. The electronic paper display panel according to claim 4, characterized in that, The electronic paper film further includes a base layer, a first padding layer, and a second padding layer. Both the first padding layer and the second padding layer are disposed on the base layer, and the first microcapsule is disposed on the first padding layer, while the third microcapsule is disposed on the second padding layer.

7. The electronic paper display panel according to claim 5, characterized in that, The electronic paper film also includes a first barrier wall, which is disposed on the first pad layer and is used to abut against the outer wall of the first microcapsule.

8. The electronic paper display panel according to claim 1, characterized in that, The diameter of the electrophoretic particles in the first microcapsule is smaller than the diameter of the electrophoretic particles in the second microcapsule.

9. A method for preparing an electronic paper display panel, characterized in that, The method for preparing the electronic paper display panel is used to prepare the electronic paper display panel as described in any one of claims 1-8, and the method for preparing the electronic paper display panel includes the following steps: An active switch and a pixel electrode are disposed on a substrate to form an array substrate, wherein the pixel unit includes a first region and a second region. In the first region, the distance between the pixel electrode and the common electrode layer is d1, and in the second region, the distance between the pixel electrode and the common electrode layer is d2, where d1 is greater than d2. An electronic paper film and a common electrode layer are formed on the array substrate. The electronic paper film includes a first microcapsule and a second microcapsule. The first microcapsule is located in the first region, and the second microcapsule is located in the second region. The diameter of the first microcapsule is smaller than the diameter of the second microcapsule, and the first microcapsule is located on the side closer to the common electrode layer.

10. A display device, characterized in that, The display device includes a driving circuit and an electronic paper display panel as described in any one of claims 1-8, wherein the driving circuit is connected to the electronic paper display panel.

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