A display module and its preparation method, and a display device

Abstract

The present application discloses a display module and a preparation method thereof, and a display device, comprising a first substrate and a second substrate; a sealed cavity formed by the alignment of the first substrate and the second substrate is filled with ink; an isolation retaining wall is arranged between the first substrate and the second substrate to form a plurality of pixel units; the isolation retaining wall comprises a first main body arranged on the first substrate and a second main body arranged on the second substrate, and a groove matching the first main body is arranged on the second main body; there is a gap between the first main body and the groove. By forming a gap between the first main body and the second main body, the ink can flow between different pixels when filling, and during the display process, the difficulty of ink particles moving between different pixels increases.

Description

Technical Field

[0001] The present application generally relates to the field of display technology, and specifically to a display module and a preparation method thereof, and a display device. Background Art

[0002] Reflective display devices are device structures that use natural light for display. They can display clearly in strong light, weak light, and ambient light. They have the advantages of low driving voltage, energy saving, and little damage to the eyes. Currently, reflective display devices can be divided into capsule type and ink type according to the material system.

[0003] Ink-based reflective display devices use particles in the ink to achieve black and white display. Since the ink has fluidity characteristics, reflective microcups are required in the structure of ink-based reflective display devices to ensure the number of particles in the pixel area to ensure the display effect.

[0004] However, the ink-type reflective display device structure has technical difficulties in the preparation process, such as difficulty in ink filling and black particle migration leading to unstable display. Summary of the invention

[0005] In view of the above-mentioned defects or deficiencies in the prior art, it is desired to provide a display module and a preparation method thereof, and a display device, which can increase the difficulty of particle migration in different reflective cups and reduce the risk of unstable display images caused by particle migration.

[0006] In a first aspect, the present application provides a display module, comprising:

[0007] a first substrate and a second substrate;

[0008] The sealed cavity formed by the alignment of the first substrate and the second substrate is filled with ink;

[0009] An isolation barrier wall is provided between the first substrate and the second substrate to form a plurality of pixel units;

[0010] The isolation retaining wall comprises a first main body arranged on the first substrate and a second main body arranged on the second substrate, wherein the second main body is provided with a groove matched with the first main body; wherein a gap exists between the first main body and the groove.

[0011] Optionally, a packaging rubber frame for controlling the distance between the substrates is provided between the first substrate and the second substrate.

[0012] Optionally, a cross-sectional shape of the first body is an inverted trapezoid, and a first side of the inverted trapezoid close to the first substrate is longer than a second side away from the first substrate.

[0013] Optionally, the width of the inner surface of the groove is greater than the width of the second side of the first body.

[0014] Optionally, a first gap exists between a first bottom surface of the first body away from the first substrate and a second bottom surface of the groove.

[0015] Optionally, there is a second gap between the side surface of the first body and the inner surface of the groove.

[0016] Optionally, the second body includes a first part close to the second substrate and a second part arranged on the first part, the groove is arranged on the second part, the second part is a deformable polymer material, and the deformable polymer material is used to fill at least part of the gap after the first substrate and the second substrate are completed in the box.

[0017] Optionally, the groove runs through the second body, the second body is made of a deformable polymer material, and the deformable polymer material is used to fill at least a portion of the gap after the first substrate and the second substrate are assembled.

[0018] In a second aspect, the present application provides a method for preparing a display module, for preparing any of the above display modules, the method comprising:

[0019] Providing a first substrate, on which a first body is disposed;

[0020] Providing a second substrate, on which a second body is disposed;

[0021] During the box-matching process, an excess amount of ink is filled between the first substrate and the second substrate, and the excess ratio of the ink is 5% to 10%.

[0022] In a third aspect, the present application provides a display device, comprising any display module as described above.

[0023] The technical solution provided by the embodiments of the present application may have the following beneficial effects:

[0024] The display module provided in the embodiment of the present application forms a gap between the first body and the second body, so that the ink can flow between different pixels during filling, and the ink is filled evenly. During the display process, the difficulty of ink particles moving between different pixels is increased, thereby avoiding poor display and improving the display effect; the allowable ink injection amount is increased, and the precision of the equipment required by the process production is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0026] Figure 1A schematic diagram of the uneven filling of ink in different pixel walls in the prior art;

[0027] Figure 2 is a schematic diagram of particle migration between different pixels in the prior art;

[0028] Figure 3 A schematic diagram of the structure of a display module provided in an embodiment of the present application;

[0029] Figure 4 A schematic diagram of the structure of a first main body provided in an embodiment of the present application;

[0030] Figure 5 A schematic diagram of the structure of another first body provided in an embodiment of the present application;

[0031] Figure 6 An embodiment of the present application provides a top view of a first body;

[0032] Figure 7 A schematic diagram of the structure of a second body provided in an embodiment of the present application;

[0033] Figure 8 A schematic diagram of the structure of a second body provided in an embodiment of the present application;

[0034] Fig. 9 An embodiment of the present application provides a top view of a second body;

[0035] Fig.10 A schematic diagram of the structure of another display module provided in an embodiment of the present application;

[0036] Fig.11 A schematic diagram of the structure of another display module provided in an embodiment of the present application;

[0037] Fig.12 A schematic diagram of the structure of another display module provided in an embodiment of the present application;

[0038] Fig.13 A schematic diagram of a process for preparing a display module provided in an embodiment of the present application;

[0039] Fig.14 A schematic diagram of particle migration between different pixels provided in an embodiment of the present application. DETAILED DESCRIPTION

[0040] The present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the relevant invention, rather than to limit the invention. It is also necessary to explain that, for ease of description, only the parts related to the invention are shown in the accompanying drawings.

[0041] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0042] Reflective display devices are device structures that use natural ambient light for display. They can achieve clear display using ambient light in strong or weak light conditions, and have the advantages of low driving voltage, energy saving, and less damage to the eyes. Currently, reflective display devices can include: capsule-type reflective display devices and ink-type reflective display devices.

[0043] The capsule-type reflective display device realizes black and white display through the particles inside the capsule. The capsule contains black and white particles, the black particles are negatively charged, and the white particles are positively charged, and the whole microcapsule is in an electrically balanced state. When the backplane is positively charged, the black particles approach the backplane electrode, and the white particles are distributed above the microcapsule. The ambient light incident from above is reflected at the white particles in the microcapsule, and the display device is in a bright state; when the backplane is negatively charged, the white particles approach the backplane electrode, and the black particles are distributed above the microcapsule. The ambient light incident from above is absorbed by the black particles in the microcapsule, and the display device is in a dark state.

[0044] A typical ink-type reflective display device is a Clear-Ink (CID) reflective display device. The working principle of the CID reflective display device is as follows: when a voltage is applied to the electrodes in the reflective display device, the black particles in the ink will move to the side opposite to the display side. At this time, the high refractive index of the dielectric layer and the low refractive index of the ink are used to achieve total reflection to achieve a bright display; when a voltage is applied to the electrodes in the reflective display device, the black particles in the ink will move to the surface of the dielectric layer on the display side, so that the light will be directly absorbed to achieve a dark display.

[0045] It is difficult to fill ink in existing ink-emitting display devices, because each pixel of CID reflective display requires a ring-shaped baffle, so the density of the baffle on the substrate is very high. During the vacuum bonding process of the color film substrate CF and the array substrate TFT, the compressible deformation of the baffle is extremely small, so the weight of the ink drop must be very accurate, which is very easy to cause the following problems: Figure 1 In addition, because the retaining walls on the substrate are all sealed structures, it is difficult for the ink to diffuse between the upper and lower substrates, and it is easy for the ink to be filled unevenly in the retaining walls of different pixels. Figure 1 (a) shows a schematic diagram of insufficient ink filling; Figure 1 (b) shows a schematic diagram of an ink overfill; Figure 1 (c) shows a schematic diagram of uneven ink diffusion filling.

[0046] Existing ink-based emissive display devices also have the technical difficulty of black particle migration leading to unstable display. The reason why each pixel barrier of CID display adopts a closed structure design is to ensure that the number of black particles in the ink under each pixel remains stable. However, when the CID device structure is overfilled with ink during the preparation process and there is a gap between the PS and the substrate, the black ink can migrate in different pixel areas, resulting in unstable display. Figure 2 shown. Figure 2 (a) shows a schematic diagram of black particles migrating between retaining walls when the ink is overfilled; Figure 2 (b) shows a schematic diagram of black particles migrating through a contact gap between a retaining wall and a substrate.

[0047] The present application provides a display module, comprising:

[0048] A first substrate 1 and a second substrate 2;

[0049] The sealed cavity D1 formed by the alignment of the first substrate 1 and the second substrate 2 is filled with ink 3;

[0050] An isolation barrier 4 is provided between the first substrate 1 and the second substrate 2 to form a plurality of pixel units D2;

[0051] The isolation retaining wall 4 includes a first main body 41 disposed on the first substrate 1 and a second main body 42 disposed on the second substrate 2 , wherein the second main body 42 is provided with a groove 43 that matches the first main body 41 ; wherein a gap exists between the first main body 41 and the groove 43 .

[0052] In the present application, when the ink 3 is filled, a gap is formed between the first body 41 and the groove 43, so that the ink 3 can flow between different pixels during filling, so that the ink 3 can be filled evenly. After the ink 3 is filled, a relatively sealed pixel area is formed between each isolation retaining wall 4, and the ink 3 does not flow. Due to the gap between the first body 41 and the groove 43, the movement path between the particles in the ink 3 is extended, so the difficulty of the particles moving between different pixels increases.

[0053] In the embodiments of the present application, Figure 4-6 As shown, the first body 41 forms a plurality of pixel regions arranged in an array on the first substrate 1, such as Figure 7-9 As shown, the second body 42 forms a plurality of pixel regions arranged in an array on the second substrate 2. In the present application, the shape of the pixel region can be square, circular, polygonal (such as diamond or hexagonal), etc., and can be set differently depending on the device or application scenario, and the present application does not limit this.

[0054] It is understandable that the shape of the groove 43 is not limited in the embodiment of the present application, and the cross-sectional shape of the groove 43 can be a trapezoid, a square, a semicircle or other shapes. Similarly, the shape of the first body 41 that matches the groove 43 is not limited in the present application, and the shape of the first body 41 can be a direction, a trapezoid, etc., and a gap can be formed between the first body 41 and the inner surface 49 of the groove 43.

[0055] Considering the aperture ratio of the display module, the first body 41 and the second body 42 preferably have the same orthographic projection area on the same substrate. Preferably, the first contact surface 51 of the first body 41 and the first substrate 1 and the second contact surface 52 of the second body 42 and the second substrate 2 have the same area.

[0056] In the embodiment of the present application, the cross-sectional shape of the groove 43 is a square, and the cross-sectional shape of the first body 41 is an inverted trapezoid for exemplary description. The first side of the inverted trapezoid close to the first substrate 1 is longer than the second side away from the first substrate 1. The width of the inner surface 49 in the groove 43 is greater than the width of the second side of the first body 41, so that a second gap 45 exists between the side surface 48 of the first body 41 and the inner surface 49 of the groove 43.

[0057] In addition, in the embodiment of the present application, there is no restriction on the height of the first body 41, the second body 42 and the groove 43, and the mating height of the first body 41 and the second body 42 is limited by the distance between the first substrate 1 and the second substrate 2. In the embodiment of the present application, a packaging rubber frame 5 for controlling the distance between the substrates is provided between the first substrate 1 and the second substrate 2.

[0058] For example, assuming that the width of the inner surface 49 of the groove 43 is d, and the width of the second side of the first body 41 is c, there is a matching relationship between the second side width c of the first body 41 and the inner surface 49 width d of the groove 43, d = c + alignment accuracy * 2, the alignment accuracy can be selected from 1-2 μm, and the width c of the second side can be selected from 0.5-6 μm. The height of the groove 43 can be selected from 0.5-25 μm.

[0059] In the embodiment of the present application, the distance between the first substrate 1 and the second substrate 2 is limited by the packaging rubber frame 5, and a sealed cavity D1 is formed between the first substrate 1 and the second substrate 2. In one embodiment of the present application, the height of the packaging rubber frame 5 is greater than the sum of the height of the first body 41 and the height from the second bottom surface 47 of the groove 43 to the second substrate 2. Therefore, there is a first gap 44 between the first bottom surface 46 of the first body 41 away from the first substrate 1 and the second bottom surface 47 of the groove 43.

[0060] It is worth noting that the formation method of the first gap 44 is not limited in the embodiment of the present application. For example, the box spacing between the first substrate 1 and the second substrate 2 can be limited by the packaging frame 5, so that the first gap 44 is formed between the first bottom surface 46 of the first body 41 and the second bottom surface 47 of the groove 43 before the first substrate 1 and the second substrate 2 are assembled. Of course, during the assembly process, an excess amount of ink 3 can be filled so that the spacing between the first substrate 1 and the second substrate 2 increases as the amount of ink increases. At this time, the first gap 44 is formed between the first bottom surface 46 of the first body 41 and the second bottom surface 47 of the groove 43.

[0061] In the embodiment of the present application, the first substrate 1 includes a first substrate 11, a filter layer 12, a lens layer 13 and a first electrode 14. The second substrate 2 includes a second substrate 21, a thin film transistor array layer 22 and a second electrode 23.

[0062] Among them, the first substrate 11 is a transparent plate-like structure, which is the substrate substrate of the first substrate 1. The second substrate 21 is a transparent plate-like structure, which is the substrate substrate of the second substrate 2. The first substrate 11 and the second substrate 21 can be a rigid substrate or a flexible substrate. The material of the rigid substrate can be transparent glass, transparent plastic, etc., and the material of the flexible substrate can be a polymer material such as polyimide (PI), polyether sulfone (PES), polycarbonate (PC), polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polyarylate (PAR), fiberglass reinforced plastic (FRP), etc.

[0063] The filter layer 12 may include a variety of color filters, and the color filters are made of color-resistance materials. Light can display different colors after passing through different color filters. The color filters correspond to the colors of the pixels, and the pixels display colors through the corresponding color filters. Taking the RGB pixels in the embodiment of the present application as an example, the filter layer 12 includes a red filter corresponding to the red pixel, a blue filter composed of the blue pixel, and a green filter corresponding to the green pixel.

[0064] The filter layer 12 is also provided with a black matrix (BM) between adjacent color filters. The black matrix is ​​a light shielding structure for avoiding crosstalk between lights of different colors between adjacent pixels and preventing external light from irradiating into the display module from between pixels.

[0065] The first substrate 1 in the display module is provided with a lens layer 13 on the side of the filter layer 12 close to the second substrate 2. The lens layer 13 includes a plurality of lenses arranged in an array, and each pixel may correspond to one or more lenses. The lens is a convex structure made of a transparent material, which protrudes from the filter layer 12 toward the second substrate 2 and has an outward convex surface facing the second substrate 2. The outward convex surface may be a part of a spherical surface (e.g., a spherical surface or an ellipsoidal surface). For example, in an embodiment of the present application, the lens is half of a sphere, and the outward convex surface is a hemispherical surface.

[0066] The first electrode 14 may be a common electrode, and the second electrode 23 may be a pixel electrode. The first electrode 14 and the second electrode 23 may include: one or more of a whole electrode and a plurality of block electrodes. In an exemplary embodiment, the first electrode 14 is a whole electrode, that is, a plurality of pixels share the same first electrode 14. The second electrode 23 is a plurality of block electrodes, that is, a block electrode is provided in each pixel region. The first electrode 14 and the second electrode 23 may be made of a transparent material, and the transparent material for making the electrode layer may be a transparent conductive oxide material such as indium tin oxide (Indium Tin Oxide, abbreviated ITO), indium zinc oxide (Indium Zinc Oxide, abbreviated IZO), etc.

[0067] The common electrode is used to provide a common voltage for multiple pixels during display driving. The pixel electrode is connected to the driving circuit in the thin film transistor array layer 22 and is applied with a data voltage. Different data voltages result in different voltage differences between the first electrode 14 and the second electrode 23, so that the speed at which the black particles migrate away from the first substrate 1 is different, thereby achieving different display grayscales.

[0068] The thin film transistor (TFT) array layer on the second substrate 2 can be a transistor structure capable of current and voltage regulation, such as polysilicon, low temperature polysilicon or IGZO. The thin film transistor TFT array layer can specifically include: an active layer, a gate insulating layer, a gate layer, an interlayer dielectric layer, a source and drain electrode, and a planar layer stacked in sequence on the substrate. As can be seen from the above, the above TFT structure is a top gate type, wherein the TFT structure in the embodiment of the present application can also be a bottom gate type, and the embodiment of the present application is not limited thereto.

[0069] In the embodiment of the present application, the display module is used to realize reflective display with a single particle of ink 3. For each pixel unit D2, when a voltage is applied to the first electrode 14 and the second electrode 23, an electric field will be formed between the two. At this time, the charged particles in each pixel unit D2 (preferably the charged particles are black) will move under the drive of the electric field. When the charged particles move to the surface of the microstructure, the light from the outside will be absorbed by the charged particles, and the pixel unit D2 is in a black state; when the charged particles leave the surface of the microstructure, since the refractive index of the reflective layer is greater than the refractive index of the air medium, total internal reflection will occur after the light from the outside is irradiated to the microstructure, and the pixel unit D2 is in a white state, thereby realizing black and white display.

[0070] The ink 3 includes an ink solvent and black particles. The black particles are located in the ink solvent. The black particles themselves have light absorption ability and can move quickly under an electric field or voltage. The black particles can be positively charged or negatively charged, which is not limited. The material of the black particles is not limited, for example, it can be charged particles doped in a black resin.

[0071] The moving direction of the black particles is related to the direction of the electric field and the positive or negative charge of the black particles. Specifically, when the black particles in a closed chamber move only under the electric field generated by the first electrode 14 and the second electrode 23, taking the black particles with positive charge as an example, if the voltage applied by the first electrode 14 is higher than the voltage applied by the second electrode 23, the direction of the electric field is from the first electrode 14 to the second electrode 23, and the black particles move toward the second electrode 23; if the voltage applied by the first electrode 14 is lower than the voltage applied by the second electrode 23, the direction of the electric field is from the second electrode 23 to the first electrode 14, and the black particles move toward the first substrate 1.

[0072] However, the present application is not limited to this. In the embodiment of the present application, the reflective type can also be achieved through the dual-particle ink 3, wherein the dual particles are white electrophoretic particles and black electrophoretic particles, two charged particles with different photoelectric properties, charged particles with different photoelectric properties, and preferred colors of the charged particles include white, black, red, green, blue and yellow, etc., which are used to achieve black and white, single color, dual color, multi-color and true color displays.

[0073] To prevent the first electrode 14 and the second electrode 23 from being conductive, the first body 41 and the second body 42 may be made of insulating materials, such as polyimide, resin (eg, any one of acrylic resin and epoxy resin) or silicon dioxide, etc. This embodiment of the application does not limit this.

[0074] In some exemplary embodiments, Figure 7 and Fig.10As shown, the second body 42 includes a first part 31 close to the second substrate 2 and a second part 32 arranged on the first part 31, the groove 43 is arranged on the second part 32, and the second part 32 is a deformable polymer material, and the deformable polymer material is used to fill at least part of the gap after the first substrate 1 and the second substrate 2 are completed.

[0075] In some other exemplary embodiments, Figure 8 and Fig.11 As shown, the groove 43 runs through the second body 42, and the second body 42 is a deformable polymer material, and the deformable polymer material is used to fill at least part of the gap after the first substrate 1 and the second substrate 2 are assembled. For example, the width a of the deformable polymer material can be 5-50um, the width b of the groove 43 can be 1-3um, and the thickness d can be 1-5um.

[0076] It should be noted that in the embodiment of the present application, the deformable polymer material can be selected from thermoplastic polymer materials such as polyacrylate, polyurethane, polyethylene, and polypropylene, which have the characteristics of softening when heated and hardening when cooled. The setting position of the deformable polymer material is not limited in the embodiment of the present application. It can be set on the first body 41 or the second body 42. Through the first body 41 and the second body 42 that cooperate with each other, the gap between the first body 41 and the second body 42 can be maintained during the ink 3 filling process. After the ink 3 is filled, part of the material can be deformed by heating or pressurizing to complete the gap sealing, such as Fig.12 As shown, it is ensured that particles in different pixel areas of the subsequent display module do not migrate.

[0077] like Fig.13 As shown, the present application provides a method for preparing a display module, which is used to prepare any of the display modules described above, and the method comprises:

[0078] S1, providing a first substrate 1, on which a first body 41 is disposed;

[0079] S2, providing a second substrate 2, on which a second body 42 is disposed;

[0080] S3. During the box-matching process, an excess amount of ink 3 is filled between the first substrate 1 and the second substrate 2, and the excess ratio of the ink 3 is 5% to 10%.

[0081] It should be noted that there is no order relationship between step S1 and step S2, and step S1 and step S2 can be performed simultaneously. The material of the first body 41 and the second body 42 can be polyimide, resin or silicon dioxide.

[0082] The technical solution of the disclosed embodiment is explained below by taking the example of the preparation process of the display module. The "patterning process" mentioned in the disclosed embodiment includes deposition of film layer, coating of photoresist, mask exposure, development, etching, stripping of photoresist and other processes, which are known mature preparation processes. Deposition can adopt known processes such as sputtering, evaporation, chemical vapor deposition, etc., coating can adopt known coating processes, and etching can adopt known methods, which are not limited here.

[0083] In step S3, ink 3 (containing charged particles) can be injected into the pixel area by coating, screen printing or filling. The specific operation method can be selected according to the needs and is not limited here.

[0084] It is worth noting that in the embodiment of the present application, the excess ratio of the ink 3 is the amount of ink in the sealed space formed after the box is paired at the same box thickness in the prior art when the ink 3 is filled. In the embodiment of the present application, the excess ink 3 can be discharged from the sealed space by pressurization in the box pairing process, that is, the amount of ink in the sealed space formed after the box is paired at the same box thickness in the present application and the prior art scheme is the same. Of course, it can also continue to remain in the sealed space, and the present application is excessive relative to the amount of ink in the sealed space formed after the box is paired at the same box thickness in the prior art. The present application does not limit this. The allowable injection amount of ink 3 is increased in the present application, and the precision of the process production to the equipment is reduced, which is conducive to the actual production of industrialization.

[0085] During the process of aligning the boxes, when the amount of ink between the first substrate 1 and the second substrate 2 is excessive, the matching gap formed between the first body 41 and the second body 42 will increase as the amount of ink 3 filled increases, so that during the process of filling the ink 3, the ink 3 can fully flow between different pixel areas through the gap. In addition, when pressurization is applied during the alignment and bonding of the first substrate 1 and the second substrate 2, the ink 3 can continue to flow between different pixels, so that the amount of ink in different pixel areas is balanced.

[0086] When the box-matching is completed, a plurality of relatively sealed chambers are formed between the first substrate 1 and the second substrate 2, and each chamber corresponds to a pixel area. In the embodiment of the present application, even if there is an excess of ink 3 in the sealed cavity D1, or there is a partial gap between the first body 41 and the second body 42, since an absolutely sealed sealed cavity D1 is formed between the first substrate 1 and the second substrate 2, a relatively sealed environment is formed between the corresponding pixel areas, which can reduce the possibility of particles between two adjacent chambers moving through the gap. In addition, in the present application, since the first gap 44 and the second gap 45 form a curved multi-segment path, the path of the particle movement process is increased compared to the structure in the prior art, such as Fig.14(I) shows an ion migration path in the prior art, Fig.14 (I) shows an ion migration path in the prior art. The display module of the present application makes it more difficult for ions to migrate as the gap increases during the display process, further reducing the possibility of ion migration between two pixel areas and improving the display effect.

[0087] In an embodiment of the present application, the method further includes forming an edge-sealing rubber frame on the first substrate 1 or the second substrate 2. The edge-sealing rubber frame can be coated on the first substrate 1 or on the second substrate 2. For example, after the edge-sealing rubber frame is formed on the first substrate 1, ink 3 is filled in the pixel area formed by the first body 41 of the first substrate 1. After the first substrate 1 and the second substrate 2 are bonded, the substrates can be subjected to a hot pressing process under vacuum conditions to soften the edge-sealing rubber frame, thereby bonding the first substrate and the second substrate together to form a display module.

[0088] In another embodiment of the present application, when the second body 42 is a deformable polymer material, after the first substrate 1 and the second substrate 2 are bonded together, the substrates can be subjected to a hot pressing process under vacuum conditions, so that part of the polymer material is softened by the heat and deformed, and can adhere to the first body 41 to complete the sealing of the gap, thereby ensuring that particles do not migrate in different pixel areas of the subsequent display module.

[0089] The technical solution of the present application can solve the problem of the prior art that the amount of ink must be precisely controlled, reduce the precision of the equipment required by the process production, and prevent the problem of particle migration between the retaining walls when the ink 3 is overfilled. The technical solution of the present application can provide a wider range of ink amounts, and even if the allowable filling amount range of the ink 3 is increased (within the excess ratio range), the uniformity of the box thickness can still be maintained.

[0090] The present application provides a display device, including any of the display modules described above. The display device may be an electronic paper, an electronic tag, or a display device with a display function such as a television, a PC, a smart phone, a tablet computer, an e-book reader, an MP3 (Moving Picture Experts Group Audio Layer III, a standard audio layer for dynamic image experts compression) player, an MP4 (Moving Picture Experts Group Audio Layer IV, a standard audio layer for dynamic image experts compression) player, or a portable computer.

[0091] It should be understood that the orientation or position relationship indicated by terms such as "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0092] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0093] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art in the technical field of the present invention. The terms used herein are only for describing specific implementation purposes and are not intended to limit the present invention. Terms such as "setting" and the like appearing in this article can mean that one component is directly attached to another component, or that one component is attached to another component through an intermediate. Features described in this article in one embodiment may be applied to another embodiment alone or in combination with other features, unless the feature is not applicable in the other embodiment or otherwise specified.

[0094] The present invention has been described through the above-mentioned embodiments, but it should be understood that the above-mentioned embodiments are only for the purpose of example and illustration, and are not intended to limit the present invention to the described embodiments. It can be understood by those skilled in the art that more variations and modifications can be made according to the teachings of the present invention, and these variations and modifications all fall within the scope of the protection claimed by the present invention.

Claims

1. A display module, characterized in that: include: a first substrate and a second substrate; The sealed cavity formed by the alignment of the first substrate and the second substrate is filled with ink; An isolation barrier wall is provided between the first substrate and the second substrate to form a plurality of pixel units; The isolation retaining wall comprises a first main body arranged on the first substrate and a second main body arranged on the second substrate, wherein the second main body is provided with a groove matched with the first main body; wherein a gap exists between the first main body and the groove; The first body is inserted into the groove, and during the box assembly process, an excess amount of ink is filled between the first substrate and the second substrate, so that a first gap exists between a first bottom surface of the first body away from the first substrate and a second bottom surface of the groove; The second body includes a deformable polymer material, and the deformable polymer material is used to fill at least a portion of the gap after the first substrate and the second substrate are assembled to ensure that particles do not migrate in different pixel areas of the subsequent display module.

2. The display module according to claim 1, characterized in that: A packaging rubber frame for controlling the distance between the substrates is arranged between the first substrate and the second substrate.

3. The display module according to claim 1, characterized in that: The cross-section of the first body is an inverted trapezoid, and a first side of the inverted trapezoid close to the first substrate is longer than a second side away from the first substrate.

4. The display module according to claim 3, characterized in that: The width of the inner surface of the groove is greater than the width of the second side of the first body.

5. The display module according to claim 1, characterized in that: A second gap exists between the side surface of the first body and the inner surface of the groove.

6. The display module according to claim 1, characterized in that: The second body includes a first part close to the second substrate and a second part arranged on the first part, the groove is arranged on the second part, the second part is a deformable polymer material, and the deformable polymer material is used to fill at least part of the gap after the first substrate and the second substrate are completed in the box.

7. The display module according to claim 1, characterized in that: The groove runs through the second body, and the second body is made of a deformable polymer material. The deformable polymer material is used to fill at least a portion of the gap after the first substrate and the second substrate are assembled.

8. A method for preparing a display module, characterized in that: For preparing a display module according to any one of claims 1 to 7, the method comprising: Providing a first substrate, on which a first body is disposed; Providing a second substrate, on which a second body is disposed; During the box-matching process, an excess amount of ink is filled between the first substrate and the second substrate, and the excess ratio of the ink is 5% to 10%.

9. A display device, characterized in that: Comprising a display module as described in any one of claims 1-7.

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