Electronic paper display device, manufacturing method thereof and electronic equipment

Abstract

The invention provides an electronic paper display device, a manufacturing method thereof and electronic equipment, and relates to the field of display. The electronic paper display device comprises a first substrate, a second substrate, a flowing medium layer and a barrier wall, the first substrate comprises a first electrode layer and a blocking lug boss, and the first electrode layer is used for covering the blocking lug boss; the second substrate comprises a second electrode layer opposite to the first electrode layer, and the second electrode layer comprises a plurality of pixel units; the flowing medium layer is arranged between the first substrate and the second substrate, and the flowing medium layer comprises filling liquid and conductive particles; and the barrier wall is arranged between the first substrate and the second substrate, is connected with the first electrode layer and the second electrode layer, is arranged on the peripheral side of the pixel unit, and is also propped against the barrier lug boss through the first electrode layer. According to the electronic paper display device provided by the invention, the condition of abnormal overturning of the conductive particles can be effectively avoided, so that the contrast ratio and the display effect of the electronic paper display device are improved.

Description

Technical Field

[0001] This application relates to the field of displays, and more particularly to an electronic paper display device, a method for manufacturing an electronic paper display device, and an electronic device. Background Technology

[0002] Electronic paper, with its passive light emission and paper-like image display characteristics, is widely used in display fields such as e-readers and electronic tags. The visible surface of an electronic paper display device is generally the surface corresponding to the top substrate (CF). The array substrate acts as a driving switch to control the electric field, and the electric field controls the color change of the particles in the paste to display the desired image.

[0003] In related technologies, pixel units are generally separated by barrier walls. However, when an electronic paper display device drives the display of different colors, although the pixel units are separated by barrier walls, the electric fields at the top of the pixel units still interfere with each other, causing abnormal flipping of conductive particles. This leads to color distortion and low contrast in the electronic paper display device, affecting the final display effect. Summary of the Invention

[0004] The main objective of this application is to provide an electronic paper display device, a method for manufacturing an electronic paper display device, and an electronic device that can effectively avoid abnormal flipping of conductive particles, thereby improving the contrast and display effect of the electronic paper display device.

[0005] In a first aspect, this application provides an electronic paper display device, which includes a first substrate, a second substrate, a flow medium layer, and a barrier wall;

[0006] The first substrate includes a first electrode layer and a blocking protrusion, wherein the first electrode layer is used to cover the blocking protrusion;

[0007] The second substrate includes a second electrode layer disposed opposite to the first electrode layer, and the second electrode layer includes a plurality of pixel units;

[0008] The flow medium layer is disposed between the first substrate and the second substrate, and the flow medium layer includes a filling liquid and conductive particles;

[0009] The barrier wall is disposed between the first substrate and the second substrate and is connected to the first electrode layer and the second electrode layer. The barrier wall is disposed on the periphery of the pixel unit and abuts against the barrier protrusion through the first electrode layer.

[0010] Secondly, this application provides a method for manufacturing an electronic paper display device, the method comprising:

[0011] Provide a first substrate and a second substrate;

[0012] A blocking protrusion is formed on the surface of the first substrate;

[0013] A first electrode layer is formed on the surface of the first substrate, and the first electrode layer covers the blocking protrusion.

[0014] By aligning and attaching the blocking protrusion covered with the first electrode layer to its corresponding blocking wall, an electronic paper display device is obtained.

[0015] Thirdly, this application provides an electronic device, which includes an electronic paper display device as described in any embodiment of this application, or is prepared by a manufacturing method of an electronic paper display device as described in any embodiment of this application.

[0016] This application provides an electronic paper display device, a method for manufacturing the electronic paper display device, and an electronic device. The electronic paper display device includes a first substrate, a second substrate, a flow medium layer, and a barrier wall. The first substrate includes a first electrode layer and a barrier protrusion, with the first electrode layer covering the barrier protrusion. The second substrate includes a second electrode layer disposed opposite to the first electrode layer, and the second electrode layer includes a plurality of pixel units. The flow medium layer is disposed between the first substrate and the second substrate, and includes a filling liquid and conductive particles. The barrier wall is disposed between the first substrate and the second substrate, and is connected to the first electrode layer and the second electrode layer. The barrier wall is disposed around the pixel units, and the barrier wall also abuts against the barrier protrusion through the first electrode layer. Therefore, when the electronic paper display device is driven to display different colors, the barrier protrusion can effectively suppress interference of the top electric field between pixel units, thereby blocking the flow of the filling liquid between pixel units and effectively preventing abnormal flipping of conductive particles, thus improving the contrast of the electronic paper display device and enhancing the viewing experience. Attached Figure Description

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0018] Figure 1 This is a top view of an electronic paper display device provided in an embodiment of this application;

[0019] Figure 2 for Figure 1 A schematic diagram of the cross-sectional structure along the Aa direction;

[0020] Figure 3 This is a cross-sectional view of a first substrate provided in an embodiment of this application;

[0021] Figure 4 A top view of another electronic paper display device provided in an embodiment of this application;

[0022] Figure 5 This application provides a schematic flowchart of a method for manufacturing an electronic paper display device according to an embodiment of the present application.

[0023] Figure 6 A cross-sectional view of another first substrate provided in an embodiment of this application;

[0024] Figure 7 A schematic block diagram of the structure of an electronic device provided in this application embodiment;

[0025] Figure label:

[0026] 100. Electronic paper display device;

[0027] 10. First substrate; 11. First electrode layer; 12. Blocking protrusion; 13. Hollow area;

[0028] 20. Second substrate; 21. Second electrode layer;

[0029] 30. Flow medium layer;

[0030] 40. Barrier wall;

[0031] 1000. Electronic devices. Detailed Implementation

[0032] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0033] The flowchart shown in the attached diagram is for illustrative purposes only and does not necessarily include all content and operations / steps, nor does it necessarily have to be performed in the order described. For example, some operations / steps can be broken down, combined, or partially merged, so the actual execution order may change depending on the actual situation.

[0034] It should be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the application. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0035] It should be understood that, in order to clearly describe the technical solutions of the embodiments of this application, the terms "first" and "second" are used in the embodiments of this application to distinguish identical or similar items with essentially the same function and effect. For example, the first callback function and the second callback function are only used to distinguish different callback functions and do not limit their order. Those skilled in the art will understand that the terms "first" and "second" do not limit the quantity or execution order, and the terms "first" and "second" do not necessarily mean they must be different.

[0036] It should also be understood that the term "and / or" as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0037] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0038] Electronic paper (ePaper) is a novel reflective display technology. Its core technology uses electronic ink to display images and text, achieving a display effect close to traditional paper. It boasts unique advantages such as paper-like display, low power consumption, and eye-friendliness. Major applications of ePaper include e-book readers, electronic tags, educational equipment, smart wearable devices, IoT displays, and advertising and information displays. With continuous technological advancements, the application scenarios of ePaper are expected to expand further, making it one of the important future development directions for display technology.

[0039] In related technologies, pixel units are generally separated by a barrier wall, and the first substrate and the second substrate are connected by the barrier wall. Since the barrier wall does not suppress interference from the top electric field, the top electric fields between pixel units may still interfere with each other, leading to abnormal flipping of conductive particles. This, in turn, causes color distortion and low contrast in the electronic paper display device, affecting the final display effect.

[0040] To address the aforementioned issues, this application provides an electronic paper display device that, when driving the display of different colors, can effectively suppress interference of the top electric field between pixel units by blocking the protrusions, thereby blocking the flow of filling liquid between pixel units and effectively preventing abnormal flipping of conductive particles, thus improving the contrast of the electronic paper display device and enhancing the viewing experience.

[0041] For example, the electronic paper display device provided in this application can be a micro-cavity electronic paper display (MED) or other electronic paper display devices, without any specific limitation.

[0042] Among them, microcavity electronic paper display (MED) is a display that uses a dam structure to surround each pixel unit on the surface of a thin film transistor (TFT) and uses electronic paste as display particles. Combined with a glass plate, it forms a microcavity structure. The color change of the particles in the paste is controlled by an electric field, and the display effect of high contrast, high reflection and high color gamut is achieved by the reflection of light by the particles.

[0043] Please see Figure 1 and Figure 2 , Figure 1 This is a top view of an electronic paper display device provided in an embodiment of this application. Figure 2 for Figure 1 A schematic diagram of the cross-sectional structure along the Aa direction.

[0044] like Figure 1 and Figure 2 As shown, the electronic paper display device 100 includes a first substrate 10, a second substrate 20, a flow medium layer 30, and a barrier wall 40; the first substrate 10 includes a first electrode layer 11 and a barrier protrusion 12, the first electrode layer 11 being used to cover the barrier protrusion 12; the second substrate 20 includes a second electrode layer 21 disposed opposite to the first electrode layer 11, the second electrode layer 21 including a plurality of pixel units.

[0045] Specifically, the side of the first substrate 10 facing away from the second substrate 20 forms the display surface of the electronic paper display device 100. When the electronic paper display device 100 is in a flat position, the first substrate 10 is generally disposed on the top of the electronic paper display device 100, so the first substrate 10 can be referred to as the top substrate. The second substrate 20 is generally disposed on the bottom of the electronic paper display device 100. The second substrate 20 can be referred to as the array substrate. The array substrate includes a second electrode layer 21 disposed opposite to the first electrode layer 11. The second electrode layer 21 includes a plurality of pixel units, and the second electrode layer 21 can be referred to as a pixel electrode.

[0046] For example, the array substrate can be a driving plate for driving the movement of conductive particles within the flow dielectric layer 30. The first substrate 10 and the second substrate 20 can be correspondingly arranged in a first direction, which can be a vertical direction, i.e., the thickness direction of the electronic paper display device 100.

[0047] like Figure 3 As shown, specifically, the blocking protrusion 12 is disposed on the surface of the first substrate 10 opposite to the second substrate 20, and extends a certain length in the direction of the second substrate 20, thereby effectively blocking the interference of the top electric field between pixel units.

[0048] For example, the blocking protrusion 12 can be any structure capable of suppressing the interference of the top electric field, or it can be a structure made of any material capable of suppressing the interference of the top electric field, without being specifically limited here.

[0049] A flow medium layer 30 is disposed between the first substrate 10 and the second substrate 20. The flow medium layer 30 includes a filling liquid and conductive particles. The conductive particles may include black particles and white particles with different electrical properties.

[0050] Specifically, the flow medium layer 30 is disposed between the top substrate and the array substrate, and the flow medium layer 30 forms a closed cavity containing a filling liquid and conductive particles distributed in the filling liquid.

[0051] For example, black and white particles can have different electrical charges. For instance, white particles may carry a negative charge and black particles may carry a positive charge; or white particles may carry a positive charge and black particles may carry a negative charge. No specific limitation is made here.

[0052] Black and white particles can undergo electrophoresis under voltage, controlling their positional distribution within the fluid dielectric layer 30 and thus creating different grayscale levels on the screen surface. Utilizing the principle of attraction between positive and negative particles, when an electric field is applied, corresponding black or white particles move to the top of the fluid dielectric layer 30, allowing the user to see black or white within that area (pixel unit). Applying different voltages to the same fluid dielectric layer 30 will result in a half-black, half-white appearance at the top, allowing the user to see gray within that area (pixel unit).

[0053] Specifically, the first electrode layer 11 and the second electrode layer 21 work together to drive the black and white particles in the flow medium layer 30 to arrange themselves so as to achieve the display and switching of different images.

[0054] The barrier wall 40 is disposed between the first substrate 10 and the second substrate 20 and is connected to the first electrode layer 11 and the second electrode layer 21. The barrier wall 40 is disposed on the periphery of the pixel unit and the barrier wall 40 also abuts against the barrier protrusion 12 through the first electrode layer 11.

[0055] Specifically, the barrier wall 40 is disposed at the edge of the flow medium layer 30, and the two ends of the support wall are respectively connected to the first electrode layer 11 and the second electrode layer 21. By setting the barrier wall 40, the compressive strength between the first electrode layer 11 and the second electrode layer 21 can be improved.

[0056] Specifically, the barrier wall 40 is also disposed between multiple pixel units, and the barrier wall 40 surrounding any pixel unit forms a sealed space for serving as the flow medium layer 30. The sealed space is filled with a filling liquid and conductive particles.

[0057] For example, the barrier wall 40 is disposed around the pixel unit. By disposing of the barrier wall 40, on the one hand, it can provide additional mechanical structural strength to the flow medium layer 30, preventing the first substrate 10 and the second substrate 20 from crushing the flow medium layer 30 during the bonding process, thereby improving the production yield and product reliability. On the other hand, it can provide a more stable and regular accommodating space for the filling liquid, improving the control accuracy and stability of the control electric field, enhancing the refresh efficiency and color gamut effect of the electronic paper display device 100, and preventing color mixing and miscoloring.

[0058] Specifically, the barrier wall 40 abuts against the barrier protrusion 12 through the first electrode layer 11, so that the barrier wall 40 and the barrier protrusion 12 block each pixel unit, and the barrier wall 40 and the barrier protrusion 12 located on the periphery of the pixel unit abut against each other to support the first substrate 10, thereby forming a sealed space of the flow medium layer 30 corresponding to each pixel unit.

[0059] Because a blocking protrusion 12 is provided at the first substrate 10, the blocking protrusion 12 can effectively suppress the interference of the top electric field between pixel units, thereby blocking the flow of filling liquid between pixel units and effectively avoiding the abnormal flipping of conductive particles, thereby improving the contrast of the electronic paper display device 100 and improving the viewing experience of the electronic paper display device 100.

[0060] In some embodiments, the material of the blocking protrusion 12 is an insulating material with an optical density greater than 2.4 and a reflectivity less than 18%.

[0061] Optical density (OD) is a physical quantity that describes the light-blocking ability of a material. It is defined as the logarithm of the ratio of incident light intensity to transmitted light intensity, and the calculation formula is OD = lg(incident light / transmitted light) or OD = lg(1 / transmittance).

[0062] Specifically, since the blocking protrusion 12 needs to suppress interference of the top electric field between pixel units and avoid affecting the normal display of pixel units, the material of the blocking protrusion 12 generally needs to be an insulating material with an optical density greater than 2.4 and a reflectivity less than 18%. This allows it to effectively suppress interference of the top electric field between pixel units without affecting the normal display of pixel units, thereby effectively preventing abnormal flipping of conductive particles.

[0063] In some embodiments, the material of the blocking protrusion 12 is black resin.

[0064] Specifically, since electronic paper display devices 100 can generally achieve color display, and color display itself is achieved using the three primary colors of red, green and blue, and electronic paper display devices 100 are reflective displays, using colors other than black may affect the contrast of electronic paper display devices 100.

[0065] Preferably, the material of the blocking protrusion 12 is black resin material, which can effectively suppress the interference of the top electric field between pixel units and effectively avoid abnormal flipping of conductive particles, while also ensuring that the contrast of the electronic paper display device 100 meets the corresponding display requirements.

[0066] In some embodiments, the projection of the blocking protrusion 12 coincides with the projection of the blocking wall 40 in the thickness direction of the electronic paper display device 100.

[0067] Specifically, in the thickness direction (i.e., the first direction) of the electronic paper display device 100, the projection of the blocking protrusion 12 coincides with the projection of the blocking wall 40, that is, the cross-sectional area of ​​the blocking protrusion 12 is the same as the cross-sectional area of ​​the blocking wall 40. This allows for a larger contact area when the blocking protrusion 12 and the blocking wall 40 abut against each other, resulting in greater support stability of the blocking protrusion 12 and the blocking wall 40 for the first substrate 10, thereby improving the stability of the electronic paper display device 100.

[0068] It should be noted that, in the thickness direction of the electronic paper display device 100, the projection of the blocking protrusion 12 and the projection of the blocking wall 40 may not coincide. For example, the projection of the blocking protrusion 12 and the projection of the blocking wall 40 can coincide, that is, the blocking protrusion 12 and the blocking wall 40 can abut against each other.

[0069] In some embodiments, the barrier wall 40 and the barrier protrusion 12 are used to form a plurality of sealed and non-connected pixel units.

[0070] Specifically, since the barrier wall 40 abuts against the barrier protrusion 12 through the first electrode layer 11, the barrier wall 40 and the barrier protrusion 12 block each pixel unit, thereby enclosing each pixel unit into a sealed space, and finally forming multiple sealed and non-connected pixel units.

[0071] like Figure 4 As shown, in some embodiments, the blocking protrusion 12 is disposed between adjacent pixel units.

[0072] Specifically, the blocking protrusion 12 can be disposed between adjacent pixel units. That is, for any pixel unit, a blocking protrusion 12 is disposed on the adjacent edge between the pixel unit and another pixel unit, and the blocking wall 40 abuts against the blocking protrusion 12 through the first electrode layer 11. For the outermost region (i.e., the edge that is not adjacent to another pixel unit), the blocking protrusion 12 may not be disposed. Since there are no adjacent pixel units in the outermost region, there will be no mutual interference of the top electric fields between pixel units. Therefore, the blocking protrusion 12 may not be disposed in the outermost region, and the first substrate 10 and the second substrate 20 can be directly connected through the blocking wall 40.

[0073] It should be noted that for any adjacent pixel unit, the barrier wall 40 abuts against the corresponding barrier protrusion 12, thereby effectively suppressing the interference of the top electric field between pixel units and blocking the flow of filling liquid between pixel units, thus effectively avoiding the abnormal flipping of conductive particles.

[0074] In some embodiments, the first electrode layer 11 and the second electrode layer 21 are made of indium tin oxide (ITO). Indium tin oxide has good electrical conductivity and is inexpensive, which helps to reduce production costs.

[0075] In some embodiments, the cross-sectional shape of the blocking protrusion 12 includes a circle, a square, a triangle, and a rhombus.

[0076] For example, the cross-sectional shape of the blocking protrusion 12 can be any shape such as circle, square, triangle and rhombus, as long as the blocking protrusion 12 can abut against the blocking wall 40, and no specific limitation is made here.

[0077] It should be noted that the cross-sectional shape of the barrier wall 40 can also be any shape. For example, the cross-sectional shape of the barrier wall 40 can be the same as or different from the cross-sectional shape of the barrier protrusion 12. No specific limitation is made here.

[0078] In some embodiments, the first substrate 10 further includes a color filter layer, which is disposed at least in the light-transmitting area of ​​the first substrate 10.

[0079] The color filter layer can be composed of an array of red, green and blue filters. Each pixel is divided into three sub-pixels, each corresponding to a filter of a different color. The brightness of each sub-pixel can be controlled by adjusting the transmittance, and various colors are generated by mixing the three primary colors.

[0080] Specifically, a color filter layer is provided at least in the light-transmitting area of ​​the first substrate 10. When the reflected light from the particles on top of the flow medium layer 30 passes through the light-transmitting area, the reflected light also passes through the color filter layer. Therefore, by adjusting the transmittance of the color filter layer, the electronic paper display device 100 can display the corresponding color, thereby realizing the color display of the electronic paper display device 100 and improving the color vividness and image clarity of the electronic paper display device 100.

[0081] In some embodiments, the second substrate 20 further includes a thin-film transistor, an insulating layer is disposed between the second electrode layer 21 and the thin-film transistor, the insulating layer has a through hole, and the second electrode layer 21 is electrically connected to the thin-film transistor at the through hole.

[0082] For example, the shape of the connecting hole can be a frustum, a cuboid, or other shapes, and is not specifically limited here.

[0083] Specifically, the thin-film transistor includes a gate, a semiconductor, a source, and a drain. The drain and the second electrode layer 21 are electrically connected to each other at a via. Furthermore, the electronic paper display device 100 also includes scan lines and data lines. The scan lines and data lines intersect each other and define multiple pixel units. Specifically, in each pixel unit, the gate is connected to the scan line, the source is connected to the data line, the drain is electrically connected to the source, and the drain and the second electrode layer 21 are electrically connected through a via.

[0084] Please see Figure 5 This application also proposes a method for manufacturing an electronic paper display device, such as... Figure 5 As shown, the manufacturing method of the electronic paper display device may include steps S101 to S104.

[0085] S101, Provide a first substrate and a second substrate.

[0086] The material of the first substrate 10 can be glass, acrylic sheet, polyethylene terephthalate (PET), polyethylene naphthalate (PEN), or polyimide film, etc., without specific limitations.

[0087] The second substrate 20 can be an array substrate, which can form multiple pixel units. It should be understood that the multiple pixel units can be arranged at intervals to form an array, or they can be arranged closely together to form an array. Those skilled in the art can design it according to actual needs, and no specific limitations are made here.

[0088] S102, forming a blocking protrusion on the surface of the first substrate.

[0089] For example, the blocking protrusion 12 can be any structure capable of suppressing electric field interference, or it can be a structure made of any material capable of suppressing electric field interference, without any specific limitation.

[0090] Taking the material of the blocking protrusion 12 as black resin as an example, the blocking protrusion 12 is formed on the surface of the first substrate 10.

[0091] like Figure 6 As shown, by way of example, a first substrate 10 is first provided, and a black resin layer is formed on the surface of the first substrate 10; the black resin layer is exposed and developed to form a black resin layer with a hollow area 13, which is the blocking protrusion 12 provided in the embodiment of this application.

[0092] For example, a black resin material is spin-coated onto the surface of a clean and dry first substrate 10, followed by baking to form a black resin layer. After baking, the first substrate 10 with the spin-coated black resin material is exposed using a photolithography machine. After the exposure, a developing solution is used for development. After development, the substrate is rinsed repeatedly with deionized water to obtain a black resin layer with a hollow area 13.

[0093] It should be noted that the position of the blocking protrusion 12 corresponds to the position of the blocking wall 40. Specifically, the blocking protrusion 12 can be formed in the first substrate 10 at the corresponding position of the blocking wall 40.

[0094] S103. A first electrode layer is formed on the surface of the first substrate, and the first electrode layer covers the blocking protrusion.

[0095] like Figure 3As shown, by way of example, a first electrode layer 11 can be formed on the surface of the first substrate 10 so that the first electrode layer 11 covers the blocking protrusion 12 located on the surface of the first substrate 10.

[0096] For example, a metal thin film can be formed on the surface of the first substrate 10 and the surface of the blocking protrusion 12 using a vapor deposition process. The metal thin film is the first electrode layer 11, wherein the metal thin film covers the blocking protrusion 12 and the first substrate 10.

[0097] S104. Align and attach the blocking protrusion covered with the first electrode layer to its corresponding blocking wall to obtain an electronic paper display device.

[0098] Specifically, the blocking protrusion 12 covered with the first electrode layer 11 can be aligned and attached to its corresponding blocking wall 40, so that the blocking protrusion 12 covered with the first electrode layer 11 and its corresponding blocking wall 40 abut against each other. Thus, when the electronic paper display device 100 is driving to display different colors, the blocking protrusion 12 can effectively suppress the interference of the top electric field between pixel units, thereby blocking the flow of filling liquid between pixel units and effectively avoiding the abnormal flipping of conductive particles, thereby improving the contrast of the electronic paper display device 100 and improving the viewing experience of the electronic paper display device 100.

[0099] It should be noted that the positions of the blocking protrusions 12 correspond to the positions of the blocking walls 40, so that the blocking protrusions 12 can all abut against the corresponding blocking walls 40, thereby further improving the support effect on the first substrate 10 and improving the stability of the electronic paper display device 100.

[0100] like Figure 7 As shown in the embodiments of this application, an electronic device 1000 is also proposed, which includes the electronic paper display device 100 as described in any embodiment of this application. This electronic device 1000 does not exhibit abnormal conductive particle flipping and has high contrast, resulting in a superior visual experience.

[0101] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. They can refer to a mechanical connection or an electrical connection. They can refer to a direct connection or an indirect connection through an intermediate medium, and they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0102] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0103] The foregoing disclosure provides many different embodiments or examples for implementing different structures of this application. To simplify the disclosure, specific examples of components and arrangements are described above. Of course, these are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this application, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0104] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with an embodiment or example is 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. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0105] The above embodiments are merely preferred embodiments of this application and should not be construed as limiting the scope of protection of this application. Any non-substantial changes and substitutions made by those skilled in the art based on this application shall fall within the scope of protection claimed by this application.

Claims

1. An electronic paper display device, characterized in that, include: A first substrate, the first substrate including a first electrode layer and a blocking protrusion, the first electrode layer being used to cover the blocking protrusion; The second substrate includes a second electrode layer disposed opposite to the first electrode layer, and the second electrode layer includes a plurality of pixel units; A flow medium layer is disposed between the first substrate and the second substrate, and the flow medium layer includes a filling liquid and conductive particles; A barrier wall is disposed between the first substrate and the second substrate and connected to the first electrode layer and the second electrode layer. The barrier wall is disposed on the periphery of the pixel unit and abuts against the barrier protrusion through the first electrode layer.

2. The electronic paper display device according to claim 1, characterized in that, The material of the blocking protrusion is an insulating material with an optical density greater than 2.4 and a reflectivity less than 18%.

3. The electronic paper display device according to claim 2, characterized in that, The material of the blocking protrusion is black resin.

4. The electronic paper display device according to claim 1, characterized in that, In the thickness direction of the electronic paper display device, the projection of the blocking protrusion coincides with the projection of the blocking wall.

5. The electronic paper display device according to claim 1, characterized in that, The barrier wall and the barrier protrusion are used to form a plurality of sealed and non-connected pixel units.

6. The electronic paper display device according to claim 1, characterized in that, The blocking protrusions are disposed between adjacent pixel units.

7. The electronic paper display device according to claim 1, characterized in that, The materials of the first electrode layer and the second electrode layer are indium tin oxide.

8. The electronic paper display device according to claim 1, characterized in that, The cross-sectional shape of the blocking protrusion includes circular, square, triangular and rhomboid shapes.

9. A method for manufacturing an electronic paper display device, characterized in that, The method includes: Provide a first substrate and a second substrate; A blocking protrusion is formed on the surface of the first substrate; A first electrode layer is formed on the surface of the first substrate, and the first electrode layer covers the blocking protrusion. By aligning and attaching the blocking protrusion covered with the first electrode layer to its corresponding blocking wall, an electronic paper display device is obtained.

10. An electronic device, characterized in that, The electronic device includes the electronic paper display device according to any one of claims 1-8, or is prepared by the manufacturing method of the electronic paper display device according to claim 9.

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