High-resolution color electronic paper display module and preparation method thereof

Abstract

The invention relates to the technical field of electronic paper, in particular to a high-resolution color electronic paper display module and a preparation method thereof.The display module comprises a substrate, a mixed layer, an electrode layer and a protective layer which are sequentially arranged, and the mixed layer comprises electronic ink capsules and photoresist; the method comprises the following steps: preparing a mixed layer solution according to a preset colorization mode; coating the mixed layer solution on a substrate by using a coating process, and depositing an electrode layer on the mixed layer; and applying a voltage signal to the electrode layer according to the target display image. The invention aims to improve the display effect of the color electronic paper and reduce the production cost of the color electronic paper.

Description

Technical Field

[0001] The present invention relates to the technical field of electronic paper, and in particular to a high-resolution color electronic paper display module and a preparation method thereof. Background Art

[0002] As an emerging display technology, color electronic paper has emerged in the field of display technology with its low power consumption and paper-like texture. It has broad application prospects, especially in the fields of e-book readers and electronic tags, showing unique advantages.

[0003] At present, there are two main ways to make color electronic paper display modules. One is to cover the black and white electronic paper with a color filter. This method is prone to color deviation due to the large thickness gap between the filter layer and the electronic ink layer. This phenomenon directly limits the minimum size of the photoresist, which makes it difficult to achieve the ideal resolution, seriously affecting the display quality. The other method is to encapsulate multi-color particles in the electronic paper capsule. Its preparation process is highly complex, so that the current market is mostly limited to three-color electronic paper products of black and white plus a single other color. This preparation process has certain limitations when facing the fast and accurate presentation of complex color images, and it is difficult to mass produce on a large scale. In addition, the above two traditional production methods cannot avoid the problem of low material utilization caused by the electronic paper cutting process, which makes it difficult to effectively control production costs. Summary of the invention

[0004] In order to improve the display effect of color electronic paper and reduce the production cost of color electronic paper, the present invention provides a high-resolution color electronic paper display module and a preparation method thereof. The technical scheme adopted is as follows:

[0005] The technical solution of the first aspect of the present invention provides a high-resolution color electronic paper display module, which includes a substrate, a mixed layer, an electrode layer and a protective layer arranged in sequence, and the mixed layer includes electronic ink capsules and photoresist.

[0006] Furthermore, the mixed layer is coated on the substrate by a coating process.

[0007] Furthermore, after the mixed layer is coated on the substrate, a color electronic ink layer is constructed using a yellow light lithography method.

[0008] Furthermore, the electronic ink capsule comprises:

[0009] The first capsule is configured with black particles and red particles;

[0010] The second capsule is configured with black particles and green particles;

[0011] The third capsule is configured with black particles and blue particles.

[0012] Furthermore, the electronic ink capsule further comprises:

[0013] The fourth capsule is configured with black particles and white particles.

[0014] Furthermore, the electronic ink capsule comprises:

[0015] The fifth capsule is configured with white particles and cyan particles;

[0016] The sixth capsule is configured with white particles and magenta particles;

[0017] The seventh capsule is configured with white particles and yellow particles;

[0018] The eighth capsule is configured with white particles and black particles.

[0019] Furthermore, the substrate is an array substrate, and the array substrate is designed with a thin film transistor array arrangement.

[0020] The technical solution of the second aspect of the present invention provides a method for preparing a high-resolution color electronic paper display module, which is used for the high-resolution color electronic paper display module described in the technical solution of the first aspect of the present invention, and the method comprises:

[0021] configuring a mixed layer solution according to a preset colorization pattern;

[0022] The mixed layer solution is coated on the substrate by a coating process, and an electrode layer is deposited on the mixed layer;

[0023] A voltage signal is applied to the electrode layer according to a target display image.

[0024] Further, coating the mixed layer solution on the substrate by a coating process, and depositing an electrode layer on the mixed layer comprises:

[0025] The mixed layer solution is coated on an array-type thin film transistor substrate prepared according to a preset colorization pattern by using a coating process;

[0026] An electrode layer and a protective layer are sequentially deposited on the mixed layer.

[0027] Further, coating the mixed layer solution on the substrate by a coating process, and depositing an electrode layer on the mixed layer comprises:

[0028] Depositing an electrode layer on the protective layer, and coating the mixed layer solution on the electrode layer using a coating process;

[0029] A bonding layer is prepared on the mixed layer, and the bonding layer is used to connect with an array-type thin film transistor substrate prepared according to a preset colorization pattern.

[0030] The present invention has the following beneficial effects:

[0031] The high-resolution color electronic paper display module provided by the present invention directly realizes color display by adopting a mixed layer formed by mixing electronic ink capsules and photoresist, thereby avoiding the color deviation problem caused by light refraction and reflection angle changes caused by the multi-layer medium of the color filter; on the other hand, the photoresist can pattern the electronic ink capsules with high precision during the patterning process in the mixed layer, thereby realizing fine pixel control, improving resolution, simplifying the production process and shortening the color mixing time. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions and advantages in the embodiments of the present invention or the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0033] Figure 1 A method flow chart of a method for preparing a high-resolution color electronic paper display module provided by the present invention;

[0034] Figure 2 A schematic structural diagram of a high-resolution color electronic paper display module provided by the first embodiment of the present invention;

[0035] Figure 3 A schematic structural diagram of a high-resolution color electronic paper display module provided by a second embodiment of the present invention;

[0036] Figure 4 A schematic structural diagram of a high-resolution color electronic paper display module provided by a third embodiment of the present invention;

[0037] Figure 5 A schematic diagram of a preparation process of a method for preparing a high-resolution color electronic paper display module provided in a fourth embodiment of the present invention;

[0038] Figure 6 A schematic diagram of a preparation process of a method for preparing a high-resolution color electronic paper display module provided in a fifth embodiment of the present invention;

[0039] Icon: 100-substrate, 200-mixing layer, 300-electrode layer; 400-protective layer. DETAILED DESCRIPTION

[0040] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the following is a detailed description of a high-resolution color electronic paper display module and its preparation method according to the present invention, its specific implementation, structure, features and effects, in combination with the accompanying drawings and preferred embodiments. In the following description, different "one embodiment" or "another embodiment" does not necessarily refer to the same embodiment. In addition, specific features, structures or characteristics in one or more embodiments may be combined in any suitable form.

[0041] Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

[0042] A specific scheme of a high-resolution color electronic paper display module and a preparation method thereof provided by the present invention is described in detail below in conjunction with the accompanying drawings.

[0043] See also Figure 2 , which shows a schematic diagram of the structure of a high-resolution color electronic paper display module provided by an embodiment of the present invention, wherein the display module comprises a substrate 100, a mixed layer 200, an electrode layer 300 and a protective layer 400 arranged in sequence, wherein the mixed layer 200 comprises electronic ink capsules and photoresist;

[0044] Specifically, the electrode layer 300 is preferably a transparent electrode layer; the substrate 100 is a prepared or selected array substrate with electrical properties and pixel layout; the array substrate should have an electrode structure that can independently control each pixel area, and this embodiment preferably uses a thin-film transistor TFT (Thin-Film Transistor) array to accurately control the electric field application and signal transmission of each pixel point; the TFT drive array is an electronic component array used for flat panel displays, which mainly manufactures thin-film transistors by depositing a series of thin film materials on substrates such as glass or plastic, and then arranges these transistors into an array form to control the electrical state of each pixel; in color electronic paper, the movement of particles of different colors in each pixel point can be accurately controlled by the TFT drive array to display various colors and patterns, thereby realizing precise control of the electronic ink capsule. The mixed layer 200 of electronic ink capsules and photoresist is specifically prepared by mixing a mixed solution of electronic ink capsules and photoresist according to the required colorization mode, and the colorization mode includes but is not limited to RGB colorization mode, RGBW colorization mode, and CMYK colorization mode; by distributing electronic ink capsules with specific color combinations on the array substrate, using the transparent electrode layer to apply an electric field to control the movement and distribution state of particles in the capsules, thereby realizing the display and combination of different colors, so as to achieve a high-resolution color display effect; the protective layer 400 mainly protects the internal materials from failure caused by external water vapor penetration, and the protective layer 400 is prepared on a conventional substrate.

[0045] Examples of colors in electronic ink capsules include: black particles: pigments or material particles with light-absorbing properties, which are used in areas where color display is not required, such as displaying black or adjusting color depth and contrast by combining with other color particles. They can be moved to the visible surface of the electronic ink capsule under the action of an electric field to block light, thereby presenting a black or dark effect to form rich color levels and clear image contours; red particles: material particles that can selectively absorb and reflect light of a specific wavelength, making it appear red in the human eye; in the RGB colorization mode, red particles cooperate with green and blue particles to produce a variety of colors containing red components through combinations of different proportions, such as orange, purple, etc.; green Color particles: have the characteristics of reflecting and absorbing light in a specific green band, and are the key component in forming green and green-related mixed colors; can work with red and blue particles to create colors such as cyan and yellow; blue particles: are used to reflect and absorb light in the blue light band. In color displays, they work with red and green particles to create various blue series and mixed colors, such as dark blue, light blue, and various composite colors containing blue tones; white particles: material particles that can evenly scatter light. When white particles move to the visible surface of the capsule, they can reflect more light, making the area appear white or light tones, which helps to improve the brightness of the display and the richness of colors, especially when displaying bright scenes or image content that requires a white background.

[0046] In actual use, electronic ink capsules of different colors are combined with a photoresist mixed solution, and the mixed solution is printed on the corresponding array substrate by coating, and a color electronic ink layer is established by yellow light lithography patterning. As another embodiment, the capsule photoresist mixed layer can also be made on a transparent electrode layer prepared with a protective layer 400 substrate, and the capsule photoresist mixed layer is precisely aligned and bonded to the TFT array substrate by alignment and bonding, so that the color units are aligned one by one with the array drive units below, and then a circle of edge sealing glue is applied around the electronic paper and cured; among them, the transparent electrode material can be selected from materials with good conductivity and transparency such as indium tin oxide (ITO); the transparent electrode layer is formed by physical vapor deposition (PVD), such as sputtering coating and other processes. The electrode material is deposited on the surface of the mixed layer 200 to form a continuous, uniform and low-resistance transparent electrode layer; the protective layer 400 can be made of the same material as the substrate 100, or can be made of organic polymers or inorganic materials, and a protective layer 400 with water-blocking properties is formed by chemical vapor deposition (CVD) or coating processes; the protective layer 400 should have good wear resistance, corrosion resistance and barrier properties to protect the internal electrode layer 300, the capsule photoresist mixed layer and the array substrate from external environmental factors such as moisture, dust, mechanical scratches, etc.

[0047] During the display process, different voltage signals are applied to the electrodes on the array substrate, and the electric field force is used to drive the colored particles in the capsule to move; when a certain color needs to be displayed, the corresponding particles in the capsule containing the colored particles and black particles move to the visible surface of the capsule under the action of the electric field, and the high-resolution color image display is achieved through the combination and distribution of different colored particles and the adjustment of the background color by the black particles; in the traditional color electronic paper display technology, when a color filter is used, due to a certain thickness interval between the filter and the electronic ink layer, the light will be refracted, reflected, etc. when penetrating these different media; and, as the incident angle of the light changes, the path of refraction and reflection will also change, resulting in the light incident at different angles passing through the filter and the electronic ink layer. After the color mixing ratio changes, the color deviation phenomenon occurs; in this embodiment, since no color filter is used, but the color display is achieved by directly mixing the color particles in the electronic ink capsule, the mixed layer formed by the electronic ink capsule and the photoresist reduces the complex medium structure that the reflected light penetrates. The light mainly interacts with the electronic ink capsule in the mixed layer, avoiding the color deviation problem caused by the refraction and reflection angle changes of the light caused by the multi-layer medium. Moreover, the structure of this mixed layer is simple and uniform. When light is incident at different angles, the absorption, reflection and scattering characteristics of the color particles in the electronic ink capsules to light change less, so the color deviation caused by the incident angle of light can be effectively avoided. On the other hand, the photoresist can pattern the electronic ink capsules with high precision during the patterning process in the mixed layer; the photoresist can accurately control the distribution of the electronic ink capsules at each pixel position, so that each pixel can be accurately defined and driven. Compared with traditional display technology, this precise patterning can better achieve fine control of pixels, thereby improving the resolution of color electronic paper; the mixed layer formed by the direct mixing and fusion of electronic ink capsules and photoresist has a relatively compact and uniform internal structure, so that under the drive of the electric field, the color particles in the capsule can move more stably and orderly, thereby shortening the color mixing time; due to the compact structure of the mixed layer, the interference between adjacent pixels is small, which improves the clarity and resolution of the picture while simplifying the production process, and the overall thickness of the color electronic paper display module is thinner.

[0048] Preferably, the mixed layer 200 is coated on the substrate 100 by a coating process; after the mixed layer is coated on the substrate 100, a color electronic ink layer is constructed by yellow light lithography; wherein, the photoresist plays a role in fixing the position of the electronic ink capsules in the mixed layer; in the state of a mixed solution, the photoresist acts as a viscous medium to evenly disperse the electronic ink capsules therein; when the mixed solution is coated on the array substrate or the transparent electrode layer, the photoresist can limit the movement of the electronic ink capsules through a curing process, so that they are stably distributed at a predetermined position; preferably, when the mixed layer solution is printed on the array substrate by a coating method, the presence of the photoresist enables patterning by yellow light lithography technology; yellow light lithography is a photolithography technology that, through the sensitivity of the photoresist to light of a specific wavelength, can selectively remove or retain the photoresist and the electronic ink capsules fixed thereto during the exposure and development process, thereby forming a desired color electronic ink layer pattern, and this patterning process can accurately control the distribution of the electronic ink capsules at each pixel position, and can achieve high-resolution electronic color paper.

[0049] See also Figure 2 Preferably, the electronic ink capsule includes: a first capsule, configured with black particles and red particles; a second capsule, configured with black particles and green particles; a third capsule, configured with black particles and blue particles; this embodiment is an electronic ink capsule configuration under the RGB colorization mode; the prepared first capsule, the second capsule, and the third capsule are mixed with the photoresist in a certain proportion; then the mixed solution is coated on the pre-prepared array substrate through a coating process; during the coating process, the coating speed and time are accurately controlled according to the viscosity of the solution and the required thickness of the mixed layer; after the coating is completed, the mixed layer is cured to cross-link and cure the photoresist, thereby fixing the position of the electronic ink capsule; then a transparent electrode layer and a protective layer 400 are prepared on the cured capsule photoresist mixed layer; this embodiment is based on the RGB colorization mode, and utilizes the coordinated operation of black particles and red, green, and blue particles to accurately mix rich and diverse colors, effectively solving the color deviation problem caused by thickness intervals in the traditional color filter method, and greatly improving the accuracy and vividness of the colors in the RGB colorization mode. Because the electronic ink capsules and photoresist are mixed to form a tight and uniform mixed layer structure, the particles in the capsules can move more stably and orderly under the drive of the electric field. In addition, the photoresist can accurately control the distribution of capsules at each pixel position during the patterning process, so that the pixels can be finely controlled, thereby significantly improving the resolution of color electronic paper and being able to display images and text content clearly and delicately.

[0050] See also Figure 3Preferably, the electronic ink capsule includes: a first capsule, configured with black particles and red particles; a second capsule, configured with black particles and green particles; a third capsule, configured with black particles and blue particles; a fourth capsule, configured with black particles and white particles; this embodiment is an electronic ink capsule configuration in the RGBW colorization mode; specifically, in the actual display process, different voltage signals are applied to the electrodes on the array substrate, and the electric field force is used to drive the particles of various colors in the capsule to move; when a certain color needs to be displayed, the particles in the corresponding capsule containing the color particles and black particles move to the visible surface of the capsule under the action of the electric field; for example, if yellow is to be displayed, the second capsule containing black particles and green particles will be driven The particles in the capsule and the first capsule containing black particles and red particles move, and through the combination and distribution of particles of different colors and the adjustment of the background color by black particles, high-resolution, colorful and accurate color image display is achieved; in this embodiment, the electronic ink capsule in the RGBW colorization mode, in terms of color presentation, compared with the traditional colorization mode, adds the configuration of white particles, and through the coordinated cooperation between black, red, green, blue and white particles, the color gamut is broadened, which can not only accurately display rich and diverse colors, but also better display bright scenes and white background related content, making the image color more vivid and realistic, and effectively overcoming the problem of poor display effect caused by color limitation of traditional technology.

[0051] See also Figure 4 Preferably, the electronic ink capsule includes: a fifth capsule, configured with white particles and cyan particles; a sixth capsule, configured with white particles and magenta particles; a seventh capsule, configured with white particles and yellow particles; an eighth capsule, configured with white particles and black particles. This embodiment is an electronic ink capsule configuration in the CMYK colorization mode, which has the same display principle as the above-mentioned RGB and RGBW colorization modes, and will not be repeated again; this embodiment is based on the principle of the CMYK color mode, through the reasonable combination and synergy of white particles and cyan, magenta, yellow, and black particles, it can accurately restore a wide range of colors. Compared with the traditional RGB mode, it is more accurate in simulating printed colors, especially suitable for professional image display and printing related applications with high color accuracy requirements, and effectively solves the shortcomings of traditional color electronic paper in color reproduction.

[0052] In summary, in the electronic ink capsule configuration under these colorization modes (RGB, RGBW, CMYK), each capsule contains two color particles; when a certain color needs to be displayed, the particles in the capsule containing the target color particles and another particle that cooperates with it swim at the same time through electric field driving; taking the RGB mode to display yellow as an example, driving the capsule containing black and green particles, black and red particles, and the two particles moving at the same time can quickly mix yellow. Compared with the existing technology of dispersing multiple color particles in one capsule or mixing colors through a complex multi-layer structure, this configuration of two particles in each capsule reduces the complexity of the path of particle movement and mixing. The particles can reach the visible surface more directly and quickly for mixing, thereby effectively shortening the color mixing time and being able to display the desired color more quickly. Compared with the traditional encapsulated electronic paper colorization method, which relies on laminating a color filter on the electronic ink membrane or directly printing a color photoresist, and first laminating an electronic ink membrane on a TFT drive array bottom plate and then laminating or printing a color filter to achieve colorization, the high-resolution color electronic paper display module provided by the present invention adopts a method of directly mixing and coating capsules and photoresist, thereby avoiding the color deviation problem caused by the thickness gap between the color filter and the electronic ink membrane, and improving the color accuracy and vividness; based on the precise control of the distribution of capsules at the pixel position during patterning of the photoresist, combined with the tight and uniform structure formed by mixing, the particles can move stably and orderly, and the pixel fine control is realized, thereby improving the resolution, and the image and text can be clearly displayed; at the same time, the production process is simplified, and the complex steps such as multi-layer lamination or printing are reduced, which helps to reduce production costs and improve production efficiency.

[0053] See also Figure 1 , which shows a method flow chart of a method for preparing a high-resolution color electronic paper display module provided by an embodiment of the present invention. The technical solution of the second aspect of the present invention provides a method for preparing a high-resolution color electronic paper display module, which is used for the high-resolution color electronic paper display module described in the technical solution of the first aspect of the present invention, and the method includes:

[0054] Step S100: configuring a mixed layer solution according to a preset colorization mode; specifically, the preset colorization mode includes but is not limited to an RGB colorization mode, an RGBW colorization mode, and a CMYK colorization mode; if the RGB colorization mode is adopted, a first capsule containing black particles and red particles, a second capsule containing black particles and green particles, and a third capsule containing black particles and blue particles are prepared; for the RGBW colorization mode, in addition to the capsules corresponding to the above RGB, a fourth capsule containing black particles and white particles is also required; if it is the CMYK colorization mode, a fifth capsule containing white particles and cyan particles, a sixth capsule containing white particles and magenta particles, a seventh capsule containing white particles and yellow particles, and an eighth capsule containing white particles and black particles are prepared; the selected electronic ink capsules are mixed with the photoresist in a certain proportion until the capsules are evenly dispersed in the photoresist to form a stable mixed layer solution.

[0055] Step S200: Use a coating process to coat the mixed layer solution on the substrate, and deposit an electrode layer on the mixed layer; specifically, the substrate is preferably a thin film transistor (TFT) array to accurately control the electric field application and signal transmission of each pixel; the mixed layer solution is coated on the substrate by spin coating or slit coating process, and a color electronic ink layer is established by yellow light lithography patterning. The electrode layer is preferably a transparent electrode layer, and the transparent electrode layer is deposited on the surface of the mixed layer by physical vapor deposition (PVD), such as sputtering coating, to form a continuous, uniform and low-resistance transparent electrode layer; a protective layer can also be prepared on the transparent electrode layer, and the protective layer can be made of the same material as the substrate, or can be made of organic polymers or inorganic materials, and the protective layer is formed by chemical vapor deposition (CVD) or coating.

[0056] Step S300: Apply voltage signals to the electrode layer according to the target display image; specifically, first digitize the target display image, analyze the color information of each pixel in the image, and convert it into a corresponding voltage signal instruction; apply these voltage signals to the corresponding electrodes on the array substrate through the control circuit, and when the electrodes receive the voltage signals, they will generate an electric field in the corresponding pixel area to drive the particles in the capsule to move. For example, in RGB mode, if you want to display yellow, apply appropriate voltages to the electrodes corresponding to the capsule containing black particles and green particles and the capsule containing black particles and red particles, so that the green particles and red particles move to the visible surface of the capsule, and the black particles move to the appropriate position to adjust the color depth and contrast, thereby presenting a yellow image;

[0057] In terms of color display, this preparation method can achieve rich and accurate color presentation through a variety of preset colorization modes and corresponding electronic ink capsule configurations, effectively avoiding the color deviation problem caused by the traditional color filter method, and improving the accuracy and vividness of the color. On the other hand, based on the structure of the mixed layer of photoresist and electronic ink capsules and the coating and electrode control process, the particles in the capsule can move stably and orderly under the drive of the electric field, and the distribution of capsules at the pixel position can be accurately controlled during the patterning process, thereby achieving high-resolution display, which can clearly and delicately display images and text content. In addition, compared with traditional processes, this preparation method simplifies the production process to a certain extent, reduces the complexity of the production process, helps to reduce production costs and improve production efficiency, and provides technical support for the wide application and large-scale production of color electronic paper in many fields such as e-readers, electronic tags, and smart wearable devices.

[0058] See also Figure 5 As a preferred embodiment, the mixed layer solution is coated on the substrate by a coating process, and the electrode layer is deposited on the mixed layer, including: coating the mixed layer solution on the array thin film transistor substrate prepared according to a preset colorization pattern by a coating process; depositing the electrode layer and the protective layer on the mixed layer in sequence; the preparation process of the high-resolution color electronic paper display module in this embodiment is:

[0059] Step 1: Prepare a TFT driving array according to a preset colorization mode;

[0060] Step 2: Apply the mixed layer solution to the TFT drive array using a coating process;

[0061] Step 3: preparing a transparent electrode layer on the mixed layer;

[0062] Step 4: preparing a protective layer on top of the transparent electrode layer;

[0063] The beneficial effect of the above embodiment is that by first constructing a precise TFT drive array, precise electrical control of each pixel can be achieved to achieve high-resolution display. Each layer is prepared on the TFT drive array in sequence, and the process sequence makes the combination between each layer relatively tight and stable; during long-term use, this tight structure helps to reduce color deviation caused by interlayer displacement or mutual interference, making the color display more stable. This preparation method is easy to standardize in large-scale production, thereby improving production efficiency and reducing production costs, and is suitable for electronic paper products that require both display performance and production efficiency.

[0064] See also Figure 6As another preferred embodiment, the method of coating the mixed layer solution on the substrate by a coating process and depositing the electrode layer on the mixed layer includes: depositing the electrode layer on the protective layer and coating the mixed layer solution on the electrode layer by a coating process; preparing a bonding layer on the mixed layer and connecting the bonding layer to the array thin film transistor substrate prepared according to a preset colorization mode; specifically, the preparation process of the high-resolution color electronic paper display module in this embodiment is:

[0065] The first step: preparing a protective layer and preparing a transparent electrode layer on the protective layer;

[0066] Step 2: coating the mixed layer solution on the transparent electrode layer by a coating process;

[0067] Step 3: Prepare a bonding layer on the mixed layer; the bonding layer uses a material with bonding properties, flexibility and electrical insulation, such as a high molecular polymer film; the bonding layer material is evenly covered on the mixed layer by coating, laminating, etc., to provide a bonding interface for subsequent lamination with the TFT drive array;

[0068] Step 4: Prepare the TFT driving array according to the preset colorization pattern and align and connect it through the bonding layer;

[0069] The beneficial effect of this embodiment is that by first preparing the protective layer and the transparent electrode layer, it helps to reduce the impact of the external environment on the core components of the display module; this embodiment is more suitable for application scenarios that require higher precision of the internal structure of the display module, require good protection performance and require flexible assembly by bonding, such as high-end electronic tags and customized electronic paper display devices; it is convenient to control the quality of each layer separately during the preparation process, reducing the process compatibility problems that may arise due to the simultaneous preparation of multi-layer structures.

[0070] It should be noted that the sequence of the above embodiments of the present invention is only for description and does not represent the advantages and disadvantages of the embodiments. The processes depicted in the accompanying drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0071] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

Claims

1. A high-resolution color electronic paper display module, characterized in that: The display module comprises a substrate, a mixed layer, an electrode layer and a protective layer which are arranged in sequence, and the mixed layer comprises electronic ink capsules and photoresist.

2. The high-resolution color electronic paper display module according to claim 1, characterized in that: The mixed layer is coated on the substrate by a coating process.

3. The high-resolution color electronic paper display module according to claim 2, characterized in that: After the mixed layer is coated on the substrate, a color electronic ink layer is constructed using a yellow light lithography method.

4. The high-resolution color electronic paper display module according to claim 1, characterized in that: The electronic ink capsule comprises: The first capsule is configured with black particles and red particles; The second capsule is configured with black particles and green particles; The third capsule is configured with black particles and blue particles.

5. The high-resolution color electronic paper display module according to claim 4, characterized in that: The electronic ink capsule also includes: The fourth capsule is configured with black particles and white particles.

6. The high-resolution color electronic paper display module according to claim 1, characterized in that: The electronic ink capsule comprises: The fifth capsule is configured with white particles and cyan particles; The sixth capsule is configured with white particles and magenta particles; The seventh capsule is configured with white particles and yellow particles; The eighth capsule is configured with white particles and black particles.

7. The high-resolution color electronic paper display module according to any one of claims 1 to 6, characterized in that: The substrate adopts an array substrate, and the array substrate adopts a thin film transistor array arrangement design.

8. A method for preparing a high-resolution color electronic paper display module, characterized in that: For the high-resolution color electronic paper display module according to any one of claims 1 to 7, the method comprises: configuring a mixed layer solution according to a preset colorization pattern; The mixed layer solution is coated on the substrate by a coating process, and an electrode layer is deposited on the mixed layer; A voltage signal is applied to the electrode layer according to a target display image.

9. The method for preparing a high-resolution color electronic paper display module according to claim 8, characterized in that: The mixed layer solution is coated on the substrate by a coating process, and the electrode layer is deposited on the mixed layer, including: The mixed layer solution is coated on an array-type thin film transistor substrate prepared according to a preset colorization pattern by using a coating process; An electrode layer and a protective layer are sequentially deposited on the mixed layer.

10. The method for preparing a high-resolution color electronic paper display module according to claim 8, characterized in that: The mixed layer solution is coated on the substrate by a coating process, and the electrode layer is deposited on the mixed layer, including: Depositing an electrode layer on the protective layer, and coating the mixed layer solution on the electrode layer using a coating process; A bonding layer is prepared on the mixed layer, and the bonding layer is used to connect with an array-type thin film transistor substrate prepared according to a preset colorization pattern.

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