Electronic paper display device and electronic device

Abstract

The application discloses an electronic paper display device, which comprises a top substrate provided with a first electrode layer, a bottom substrate provided with a second electrode layer, a filling layer provided with an electronic paste, a first blocking structure and a second blocking structure. The filling layer is arranged between the top substrate and the bottom substrate. The first blocking structure is arranged on the periphery of the filling layer. The second blocking structure is arranged on the periphery of the first blocking structure. The first blocking structure and the second blocking structure are both located between the top substrate and the bottom substrate and are connected with the top substrate and the bottom substrate. The first blocking structure and the second blocking structure are spaced apart and form a first buffer cavity. In this way, the electronic paste can be prevented from overflowing or flowing into the display area from the frame glue during the packaging process, so that display abnormalities are avoided. The application also provides an electronic device with the electronic paper display device.

Description

Technical Field

[0001] This application relates to the field of electronic paper technology, and more particularly to an electronic paper display device and electronic device. Background Technology

[0002] Among electronic paper technologies, electrophoretic display technology has developed the fastest. It uses charged particles to migrate under the influence of an electric field to display different images and is widely used in display fields such as e-readers and electronic tags.

[0003] In the manufacturing process of existing electronic paper display products, adhesive and electronic paste must be applied first, and then the upper board and substrate are bonded together. The frame adhesive is cured by applying pressure and baking. During the pressure process, the frame adhesive and paste are squeezed and flowed together, causing the paste to flow out or the frame adhesive to flow into the display area, resulting in display abnormalities and frame defects. Utility Model Content

[0004] The main objective of this application is to provide an electronic paper display device that addresses the issues of slurry overflowing into the display area or border adhesive flowing into the display area during the encapsulation process, resulting in display abnormalities and border defects.

[0005] To achieve the above objectives, this application provides an electronic paper display device, the electronic paper display device comprising: A top substrate, on which a first electrode layer is disposed; A bottom substrate, the bottom substrate including a second electrode layer; A filler layer is disposed between the top substrate and the bottom substrate, and an electronic paste is disposed within the filler layer, forming a display area; A first blocking structure is disposed on the periphery of the display area, located between the top substrate and the bottom substrate, and in contact with the top substrate and the bottom substrate; and The second blocking structure is disposed on the periphery of the first blocking structure and located between the top substrate and the bottom substrate, and is in contact with the top substrate and the bottom substrate, wherein the first blocking structure and the second blocking structure are spaced apart and form a first buffer cavity.

[0006] As can be seen from the above technical solution, this application, by setting a second blocking structure, forms a buffer cavity between the electronic paste and the frame adhesive, which can accommodate overflowing plasma or inward flowing frame adhesive, and absorb material displaced during the pressure encapsulation process. This prevents plasma from overflowing or frame adhesive from flowing into the effective display area, thus avoiding display abnormalities and frame defects. Furthermore, this application also provides an electronic device, including the aforementioned electronic paper display device. Attached Figure Description

[0007] Figure 1 This is a schematic diagram of the structure of an electronic paper display device provided in an embodiment of this application; Figure 2 This is a schematic diagram of the structure of an electronic paper display device provided in another embodiment of this application; Figure 3 A partial structural schematic diagram of the electronic paper display device provided in this application; Figure 4 Another partial structural schematic diagram of the electronic paper display device provided in this application; Figure 5a and Figure 5b This is a schematic diagram of the structure of the first buffer chamber; Figure 6a and Figure 6b A schematic diagram of the deformed structure of the third blocking structure; Figures 7a to 7c This is a schematic diagram of the deformed structure of the second blocking structure.

[0008] Figure label: 10. Electronic paper display device; 11. Top substrate; 111. First electrode layer; 12. Bottom substrate; 121. Second electrode layer; 13. Filling layer; 14. First barrier structure; 141. First buffer cavity; 1411, First buffer chamber; 15, Second blocking structure; 151, First blocking component; 152. Second barrier; 153. Second buffer chamber; 154. Third barrier; 1531. Second buffer chamber; 16. Third barrier structure; 17. Fourth barrier structure; 18. Sealant; A. Display area; B. Non-display area. Detailed Implementation

[0009] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application. All other embodiments obtained by those skilled in the art based on the embodiments in this application without inventive effort are within the scope of protection of this application.

[0010] Please see Figures 1 to 3 This application provides an electronic paper display device 10, including: a top substrate 11, a bottom substrate 12, a filling layer 13, a first blocking structure 14 and a second blocking structure 15.

[0011] A first electrode layer 111 is disposed on the top substrate 11, a second electrode layer 121 is disposed on the bottom substrate 12, a filling layer 13 is disposed between the top substrate 11 and the bottom substrate 12, and an electronic paste is disposed in the filling layer 13, forming a display area A.

[0012] The first blocking structure 14 is disposed on the periphery of the display area A and is located between the top substrate 11 and the bottom substrate 12, and is in contact with the top substrate 11 and the bottom substrate 12.

[0013] The second blocking structure 15 is disposed on the periphery of the first blocking structure 14 and is located between the top substrate 11 and the bottom substrate 12, and is in contact with the top substrate 11 and the bottom substrate 12. The first blocking structure 14 and the second blocking structure 15 are spaced apart and form a first buffer cavity 141.

[0014] In this embodiment, a first buffer cavity 141 is formed by providing a second blocking structure 15 at intervals around the first blocking structure 14. With this configuration, when the electronic paper display device 10 is pressurized during encapsulation, and the electronic paste flows and is pushed against each other, the first buffer cavity 141 can contain the overflowing electronic paste, preventing the electronic paste from overflowing into the frame area and causing frame defects.

[0015] like Figure 2 and Figure 3 As shown, in some embodiments, the electronic paper display device 10 further includes a fourth blocking structure 17, which is arranged in an array on the second electrode layer 121 and divides the filling layer 13 into multiple pixel electrode units. The fourth blocking structure 17 is disposed between the top substrate 11 and the bottom substrate 12, and its two ends are respectively connected to the top substrate 11 and the bottom substrate 12. Each pixel electrode unit is provided with electronic paste.

[0016] It is understood that the fourth blocking structure 17 can be one or more, and is not limited. For example, there can be multiple fourth blocking structures 17, and multiple fourth blocking structures 17 are arranged in an array along the first direction in the display area A; or, there can be multiple fourth blocking structures 17, and multiple fourth blocking structures 17 are arranged in an array along the second direction in the display area A; or, there can be multiple fourth blocking structures 17, and multiple fourth blocking structures 17 are arranged in an alternating array along the first direction and the second direction in the display area A. Optionally, the first direction and the second direction are set at an angle, for example, the first direction and the second direction are perpendicular to each other.

[0017] In this embodiment, in order to prevent the disordered flow of conductive particles in the electronic paste and thus maintain the stability of the image, the filling layer 13 is divided into multiple non-connected spaces by setting a fourth blocking structure 17 to form multiple pixel electrode units, and the electronic paste is uniformly disposed in each space, thereby improving the display effect of the electronic paper display device 10.

[0018] It should also be noted that in some specific examples, the bottom substrate 12 includes a display area A and a non-display area B. The area corresponding to the filling layer 13 on which the electronic paste is disposed is the display area A, and the area outside the filling layer 13 is the non-display area B. The non-display area B is also provided with an electrical connection area, such as the metal pad area of ​​the driver chip (IC) and the flexible circuit board (FPC). During operation, the flexible circuit board transmits electrical signals to the driver chip, and the driver chip then controls the pixel electrode through the metal pad area, thereby driving the electronic paste to move to present an image.

[0019] Specifically, in some examples, the first electrode layer 111 and the second electrode layer 121 are vertically aligned to jointly drive the electron paste between them to align, thereby enabling the display and switching of different images. It should be understood that the first electrode layer 111 and the second electrode layer 121 are conductive materials, such as ITO, but not limited to these. The electron paste includes at least conductive particles.

[0020] In some embodiments, the electronic paper display device 10 further includes a sealant 18 disposed on the side of the second blocking structure 15 away from the first buffer cavity 141, and used to connect the top substrate 11 and the bottom substrate 12.

[0021] For example, such as Figure 3 As shown, a first blocking structure 14 surrounds the periphery of the display area A, and a second blocking structure 15 surrounds the periphery of the first blocking structure 14. A first buffer cavity 141 is formed between the first blocking structure 14 and the second blocking structure 15. A sealant 18 is provided on the side of the second blocking structure 15 away from the first buffer cavity 141 for fixing and connecting the top substrate 11 and the bottom substrate 12. With this configuration, during the encapsulation and pressurization process of the electronic paper display device 10, when the electronic paste and the sealant 18 flow against each other, the first buffer cavity 141 can contain the overflowing electronic paste and sealant 18, which can prevent the electronic paste from overflowing outwards into the display area A or the sealant 18 from flowing inwards into the display area A, causing crosstalk and resulting in display abnormalities or poor bezels.

[0022] Further, please refer to Figure 4 , Figure 5a and Figure 5b In some implementations, such as Figure 4As shown, the distance d between the first blocking structure 14 and the second blocking structure 15 satisfies 500μm ≥ d ≥ 50μm. It can be understood that the second blocking structure 15 serves as a secondary outer layer of protection. An appropriate distance d between the first blocking structure 14 and the second blocking structure 15 prevents the filling material from overflowing under pressure or aging. For example, if d is too small, the material may be squeezed into the cavity; if d is too large, the sealing effect may be reduced.

[0023] Specifically, such as Figure 5a As shown, the spacing between the two sides of the first buffer cavity 141 gradually increases from the top substrate 11 towards the bottom substrate 12. Alternatively, as... Figure 5b As shown, the distance between the two sides of the first buffer cavity 141 gradually decreases from the top substrate 11 to the bottom substrate 12.

[0024] It is understood that in this embodiment, the first buffer cavity 141 is trapezoidal or inverted trapezoidal in shape, which has a better anti-overflow effect. For example, when the first buffer cavity 141 is trapezoidal, the top opening is narrow, which can physically limit the upward diffusion of the electronic paste due to capillary action or pressure difference during filling or encapsulation, reducing the risk of overflow. At the same time, when the temperature rises, the volume of the electronic paste expands, and the wide space at the bottom can accommodate the expanding liquid, reducing the lateral pressure on the first barrier structure 14 and the second barrier structure 15, and preventing cracking. When the first buffer cavity 141 is inverted trapezoidal, the first barrier structure 14 forms a receiving cavity with a narrow bottom opening and a wide top opening, which can facilitate the injection of electronic paste into the filling layer 13, reduce filling defects such as air bubbles or incomplete filling, and at the same time, due to the enhanced sealing at the narrow bottom opening, it can prevent the electronic paste from leaking downwards into the driving circuit or edge area.

[0025] Please see Figure 6a and Figure 6b In some embodiments, the electronic paper display device 10 further includes a third blocking structure 16, which is located between and connected to the first blocking structure 14 and the second blocking structure 15, and divides the first buffer cavity 141 into at least two first buffer chambers 1411. This arrangement not only divides the first buffer cavity 141 into multiple first buffer chambers 1411, forming a multi-level buffer, but also, as an internal support beam, the third blocking structure 16 forms a three-dimensional grid support with the first blocking structure 14 and the second blocking structure 15, further enhancing the mechanical strength of the display device.

[0026] In some specific examples, the third blocking structure 16 is connected to the top substrate 11 and the bottom substrate 12. It can be understood that the two ends of the third blocking structure 16 are connected to the top substrate 11 and the bottom substrate 12 respectively, which can serve as a load-bearing support column to enhance the overall mechanical support and prevent the filling layer 13 between the top substrate 11 and the bottom substrate 12 from collapsing in the middle due to external pressure, thus affecting the uniformity of the display.

[0027] Optionally, there may be multiple third blocking structures 16, and the extending directions of adjacent third blocking structures 16 may be different. For example, such as... Figure 6a As shown, the two adjacent third blocking structures 16 extend in directions orthogonal to the first blocking structure 14 and the second blocking structure 15 at 90°, or, as Figure 6b As shown, the two adjacent third blocking structures 16 extend in directions that are at different angles to the first blocking structure 14. This arrangement can form a stable support between the top substrate 11 and the bottom substrate 12.

[0028] Please see Figure 7a In some specific examples, the second blocking structure 15 includes at least a first blocking member 151 and a second blocking member 152, wherein the first blocking member 151 is disposed on the periphery of the first blocking structure 14 and is located between the top substrate 11 and the bottom substrate 12, and is in contact with the top substrate 11 and the bottom substrate 12.

[0029] The second blocking member 152 is disposed on the periphery of the first blocking member 151 and is located between the top substrate 11 and the bottom substrate 12, and is in contact with the top substrate 11 and the bottom substrate 12. The first blocking member 151 and the second blocking member 152 are spaced apart and form a second buffer cavity 153.

[0030] In this embodiment, since the second blocking structure 15 includes at least a first blocking member 151 and a second blocking member 152, that is, at least a first buffer cavity 141 and a second buffer cavity 153 are sequentially formed on the periphery of the filling layer 13, this arrangement can effectively improve the overflow prevention effect. It can be understood that by setting a second blocking structure 15 with multiple blocking members to form multiple buffer cavities, a stepped blocking effect can be formed, intercepting overflow step by step and further improving the overflow prevention effect. Furthermore, the multi-cavity structure can disperse the kinetic energy or thermal expansion pressure of the electronic paste flow, preventing overload of a single buffer cavity from affecting the sealing performance.

[0031] Please see Figure 7b and Figure 7cIn some embodiments, the second blocking structure 15 further includes a third blocking member 154, which is located between the first blocking member 151 and the second blocking member 152, and is connected to the first blocking member 151 and the second blocking member 152, thus dividing the second buffer cavity 153 into at least two second buffer chambers 1531. In other words, the second buffer cavity 153 can be spatially divided by the third blocking member 154 to form a labyrinthine barrier, thereby achieving multi-stage overflow control. It should be noted that the third blocking member 154 can also play a supporting and stabilizing role, thereby improving the compressive strength of the overall structure.

[0032] In some specific examples, the third barrier 154 is connected to the top substrate 11 and the bottom substrate 12. It can be understood that the third barrier 154 directly connects the top substrate 11 and the bottom substrate 12, effectively improving the support effect. More specifically, there are multiple third barrier 154s, and the extending directions of adjacent third barrier 154s may be different or the same. For example, as... Figure 7b As shown, the two adjacent third blocking members 154 extend along a direction that forms a 90° angle with the first blocking member 151, or, as Figure 7c As shown, the two adjacent third barrier members 154 extend in directions with different angles to the first barrier member 151 to form a mesh support structure, which can evenly distribute mechanical stress from any direction (such as bending, squeezing, vibration) and avoid local collapse caused by insufficient support in one direction.

[0033] This application also provides an electronic device including the aforementioned electronic paper display device 10. Therefore, this electronic device has the relevant beneficial effects of the aforementioned embodiments, which will not be elaborated upon here.

[0034] The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. An electronic paper display device, characterized in that, include: A top substrate, on which a first electrode layer is disposed; A bottom substrate, the bottom substrate including a second electrode layer; A filler layer is disposed between the top substrate and the bottom substrate, and an electronic paste is disposed within the filler layer, forming a display area; A first blocking structure is disposed on the periphery of the display area and located between the top substrate and the bottom substrate, and is in contact with the top substrate and the bottom substrate; and The second blocking structure is disposed on the periphery of the first blocking structure and located between the top substrate and the bottom substrate, and is in contact with the top substrate and the bottom substrate, wherein the first blocking structure and the second blocking structure are spaced apart and form a first buffer cavity.

2. The electronic paper display device according to claim 1, characterized in that, The distance d between the first blocking structure and the second blocking structure satisfies 500μm≥d≥50μm.

3. The electronic paper display device according to claim 1, characterized in that, The distance between the two sides of the first buffer cavity gradually increases from the top substrate to the bottom substrate. Alternatively, the distance between the two sides of the first buffer cavity gradually decreases from the top substrate towards the bottom substrate.

4. The electronic paper display device according to claim 1, characterized in that, The second blocking structure includes at least a first blocking member and a second blocking member, wherein the first blocking member is disposed on the periphery of the first blocking structure and is located between the top substrate and the bottom substrate, and is in contact with the top substrate and the bottom substrate; The second blocking member is disposed on the periphery of the first blocking member and is located between the top substrate and the bottom substrate, and is in contact with the top substrate and the bottom substrate, wherein the first blocking member and the second blocking member are spaced apart and form a second buffer cavity.

5. The electronic paper display device according to claim 4, characterized in that, The second blocking structure further includes a third blocking member, which is located between the first blocking member and the second blocking member, and is connected to the first blocking member and the second blocking member, and divides the second buffer cavity to form at least two second buffer chambers.

6. The electronic paper display device according to claim 5, characterized in that, The third blocking member is connected to the top substrate and the bottom substrate; And / or, there are multiple third blocking elements, and the extension directions of two adjacent third blocking elements are different.

7. The electronic paper display device according to claim 1, characterized in that, The electronic paper display device further includes a third blocking structure, which is located between the first blocking structure and the second blocking structure and is connected to the first blocking structure and the second blocking structure, and divides the first buffer cavity to form at least two first buffer chambers.

8. The electronic paper display device according to claim 7, characterized in that, The third blocking structure is in contact with the top substrate and the bottom substrate; And / or, there are multiple third blocking structures, and the extension directions of two adjacent third blocking structures are different.

9. The electronic paper display device according to claim 1, characterized in that, It also includes a sealant disposed on the side of the second barrier structure away from the first buffer cavity, and used to connect the top substrate and the bottom substrate.

10. An electronic device, characterized in that, Includes the electronic paper display device according to any one of claims 1-9.

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