Microlens array, manufacturing method thereof and display device

Abstract

The invention relates to a micro-lens array, a manufacturing method thereof and a display device. The micro lens array comprises a substrate base plate; the isolating layer is used for defining a plurality of light-transmitting areas on the substrate; the first lenses are arranged in the light-transmitting areas respectively, and materials for preparing the first lenses comprise temperature sensing materials so that the first lenses can sense temperature changes to deform.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a microlens array and a manufacturing method thereof, and a display device. Background Art

[0002] Display technology often has problems such as low light efficiency, color distortion, and limited viewing angle. In order to improve the display effect, researchers are constantly exploring new optical control technologies. Among them, microlens arrays, as an important optical component, are widely used in improving image contrast and enhancing reality. Summary of the invention

[0003] The present application provides a microlens array and a manufacturing method thereof, and a display device, so as to improve the display effect.

[0004] In a first aspect, a microlens array is provided, comprising: a base substrate; an isolation layer, wherein a plurality of light-transmitting regions are defined on the base substrate; and a plurality of first lenses, respectively arranged in the plurality of light-transmitting regions, wherein the material for preparing the first lenses comprises a temperature-sensitive material so that the first lenses can sense temperature changes and undergo deformation.

[0005] In some embodiments, the microlens array plate further includes: a heat conductive layer disposed on the plurality of first lenses.

[0006] In some embodiments, the first lens is a cylindrical lens, including a cylindrical portion and a lens portion, and the material used to prepare the cylindrical portion and / or the lens portion includes a temperature-sensitive material.

[0007] In some embodiments, the first lens is made of a gel solution including a temperature-sensitive material.

[0008] In some embodiments, the temperature sensing material includes polyvinylidene fluoride.

[0009] In a second aspect, a display device is provided, comprising: a display substrate, comprising a plurality of pixel areas; a first microlens array, which adopts the above-mentioned microlens array, the first microlens array and the display substrate are arranged relative to each other, the plurality of light-transmitting areas of the first microlens array correspond to the positions of the plurality of pixel areas, and the first lens of the first microlens array is located on a side of the base substrate close to the display substrate.

[0010] In some embodiments, the display substrate includes: a light-emitting film layer for emitting display light; a second microlens array arranged on the light emitting side of the light-emitting film layer, including multiple second lenses, and the multiple second lenses are respectively arranged in the multiple pixel areas.

[0011] In a third aspect, a method for manufacturing a microlens array is provided, comprising: forming an isolation layer on a base substrate, the isolation layer defining a plurality of light-transmitting areas on the base substrate; forming a plurality of first lenses in the plurality of light-transmitting areas, respectively, the material for preparing the first lenses comprising a temperature-sensitive material so that the first lenses can sense temperature changes and deform.

[0012] In some embodiments, forming a plurality of first lenses in a plurality of light-transmitting regions respectively includes: preparing a gel solution including a temperature-sensitive material; inkjet printing the gel solution in the plurality of light-transmitting regions; curing the gel solution; and graphing the cured gel solution to form a plurality of first lenses.

[0013] In some embodiments, preparing a gel solution including a temperature-sensitive material includes: mixing a temperature-sensitive material gelling agent, a plasticizer, and a solvent in a preset ratio, and stirring the mixture to form a gel solution. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 A schematic diagram of the structure of a display device in some embodiments of the present application;

[0016] Figure 2 Schematic diagram of the imaging principle of a cylindrical lens in some embodiments of the present application;

[0017] Figure 3 Schematic diagram of the structure of cylindrical lenses in some embodiments of the present application;

[0018] Figure 4 Schematic diagram of the structure of cylindrical lenses in some embodiments of the present application;

[0019] Figure 5 This is a flow chart of a method for manufacturing a microlens array in some embodiments of the present application. DETAILED DESCRIPTION

[0020] The technical solution of the present application will be described clearly and in detail below in conjunction with the drawings of the embodiments of the present application. Obviously, the embodiments described below are part of the embodiments of the present application rather than all of the embodiments, and are only used to more clearly illustrate the technical solution of the present application. Therefore, they are only used as examples, and the protection scope of the present application cannot be limited by this. Based on the described embodiments of the present application, all other embodiments that can be obtained by those skilled in the art without creative work belong to the scope of protection of the present application.

[0021] Unless otherwise defined, all technical and scientific terms used herein shall have the meanings commonly understood by technicians in the technical field of this application; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the embodiments of this application and any variations thereof are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the embodiments of this application are only used to distinguish different objects and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the embodiments of this application, unless otherwise stated, "multiple" means more than two.

[0022] Display technology often has problems such as low light efficiency, color distortion, and limited viewing angle. As an important optical component, microlens array can improve display effects and has wide applications in improving image contrast, augmented reality (AR), and virtual reality (VR).

[0023] The microlens array can be formed in the pixel area of ​​the display substrate, or can be formed on the base substrate and arranged on the display side of the display substrate. The microlens array can include a plurality of lenses distributed in an array, and each lens can correspond to one or more pixel area positions. The microlens array can include concave lenses and / or convex lenses, which can be selected according to actual application requirements.

[0024] The present application provides a microlens array that is temperature-sensitive and can achieve dynamic light regulation based on temperature. A display device that uses the microlens array of the present application can improve display effects.

[0025] The display device in the embodiment of the present application may be a display panel, or may be a device with a display function, such as a television, a tablet computer, a wearable device, a desktop computer, a laptop computer, etc.

[0026] The technical solution of the present application will be described in detail below with the accompanying drawings and specific embodiments.

[0027] like Figure 1As shown, according to some embodiments of the present application, a microlens array is provided, which includes: a first base substrate 101; an isolation layer 10, defining a plurality of light-transmitting areas 100 on the first base substrate 101; a plurality of first lenses, respectively arranged in the plurality of light-transmitting areas 100, and the material for preparing the first lenses includes a temperature-sensitive material so that the first lenses can sense temperature changes and deform.

[0028] Therefore, the microlens array is temperature sensitive and can sense temperature changes and deform, so that the microlens array can adjust the light regulation effect, for example, adjust the light transmission path and adjust the transmittance. In this way, in the key display area of ​​the image, because the pixels are brighter, the current is larger, and more heat is generated, the microlens array can sense the temperature rise in this area in real time and deform to increase the transmittance. The higher the temperature, the greater the deformation of the microlens array, resulting in display enhancement. Therefore, the deformation degree of the microlens array can be adjusted according to the needs of the display picture, and the corresponding display effect can be dynamically adjusted to make the picture more vivid and realistic.

[0029] The microlens array of the present application achieves the ray tracing effect by dynamically adjusting the pixel compensation light, making the dynamic picture more vivid and realistic. It can be applied to display, augmented reality (AR), virtual reality (VR) and other fields to achieve a three-dimensional display technology that is light, wide in viewing angle and has good dynamic compensation effect.

[0030] exist Figure 1 In the illustrated example, the first base substrate 101 can be a flexible substrate, so as to provide a deformation space for the lens. In this case, the deformation amount of the first lens can be 1-2um, which is suitable for the enhanced display of the two-dimensional display. Since the deformation amount of the first lens is small, the elastic deformation amount of the flexible substrate is sufficient to provide the required deformation space for the first lens. The material of the flexible substrate can be glass, polyimide (PI), polyethylene terephthalate (PET), polydimethylsiloxane (PDMS), etc.

[0031] It is understandable that two opposing substrates may be provided, and an isolation layer including a plurality of isolation columns may be formed between the two substrates, and the plurality of isolation columns may play a supporting role to form a deformation space between the two substrates, and provide the required deformation space for the first lens. In this case, the deformation amount of the first lens may be less than 1 mm, which is suitable for enhanced display of three-dimensional display, and sufficient deformation space may be provided between the two substrates for deformation of the first lens through the plurality of isolation columns.

[0032] In some embodiments, the first lens of the microlens array may be, but is not limited to, a cylindrical lens. A cylindrical lens array is provided on the display side of the display substrate to achieve naked-eye 3D display.

[0033] Taking a cylindrical lens as an example, the principle of the technical solution of the present application is:

[0034] like Figure 2 As shown, the spherical vertex of the cylindrical lens is selected as the origin O of the coordinate system, and its optical axis is the X-axis. Assume that F is the first focus of the cylindrical lens, H is the first principal point, its coordinate on the X-axis is XH, and f is the first focal length; F′ is the second focus of the cylindrical lens, H′ is the second principal point, H′ coincides with the origin O, and f′ is the second focal length. The light formed by the focus F′ on the image plane makes an angle θ with the optical axis and eventually falls into the human eye at point (D, v). From the geometric relationship in the figure, the relationship between the point on the image plane at a distance h from the optical axis and the eye position (D, v) can be deduced.

[0035] In the key display area of ​​the image, due to the high brightness and large current, the heat generated increases. The length d of the first lens will increase when sensing the temperature increase, thereby increasing the light transmittance in the key display area of ​​the image. In this way, the dynamic picture display will appear enhanced and the corresponding display effect can be dynamically adjusted.

[0036] The object distance S (the distance from the display substrate to the microlens array) can also be controlled to decrease by sensing the temperature increase, thereby increasing the temperature sensitivity.

[0037] According to some embodiments of the present application, when the first lens is a cylindrical lens, the first lens includes a cylindrical portion 110 and a lens portion 111. The material used to prepare the cylindrical portion 110 and / or the lens portion 111 includes a temperature-sensitive material so as to be able to sense temperature changes and adjust the length d of the cylindrical lens. The lens portion 111 may include a concave lens and / or a convex lens.

[0038] In some embodiments, the columnar portion 110 can be disposed close to the display substrate, and the material used to prepare the columnar portion 110 includes a temperature-sensitive material. Thus, the columnar portion 110 can sense temperature changes and not only adjust the length d of the columnar lens, but also adjust the distance S between the display substrate and the columnar lens array, thereby being able to better sense temperature changes in the pixel area, sense deformation due to temperature changes, and adjust the degree of deformation according to the magnitude of the temperature change, thereby having better temperature sensitivity.

[0039] exist Figure 3 In the illustrated example, the lens portion 111 of the cylindrical lens is a convex lens, that is, a single lens structure. It can be understood that the cylindrical lens of the single lens structure can also be a concave lens.

[0040] exist Figure 4 In the illustrated example, the lens portion 111 of the cylindrical lens is a lens group including a convex lens and a concave lens.

[0041] The temperature-sensitive material for preparing the lens may include polyvinylidene fluoride (PVDF), for example. When the temperature changes, the PVDF undergoes a phase change, causing the shape of the first lens to change, thereby achieving dynamic regulation of the light beam, and having excellent temperature-sensitive performance and optical performance. In addition to PVDF, the temperature-sensitive material may also include other temperature-sensitive materials, which are not listed here one by one.

[0042] According to some embodiments of the present application, the first lens 11 may be made of a gel solution including a temperature-sensitive material. In this case, the first lens of the desired shape and parameters may be obtained by an embossing process after the gel solution is solidified (to be described in detail below), and the manufacturing process is simple and the cost is low. By adjusting the concentration of the gel solution and the coating thickness, its response speed and light transmittance may be optimized.

[0043] The gel solution may also include a plasticizer and a solvent, and the plasticizer may be, for example but not limited to, diethyl adipate (DEA) to facilitate the solidification of the gel solution. The solvent facilitates uniform mixing of the plasticizer and the temperature-sensitive material, improves the solidification effect of the gel solution, and can enhance the flexibility and transparency of the gel, ensuring that the microlens array has good optical properties.

[0044] According to some embodiments of the present application, the microlens array plate may further include: a heat-conducting layer disposed on the plurality of first lenses, the heat-conducting layer having good thermal conductivity and being able to quickly conduct heat to the first lenses to achieve a rapid response.

[0045] According to some embodiments of the present application, the inner diameter of the bottom of the light-transmitting region 100 close to the first base substrate 101 can be gradually increased in the direction away from the first base substrate 101, and the cushion layer 12 can be first formed in the light-transmitting region 100 before the first lens 11 is formed in the light-transmitting region 100. Since the surface area of ​​the cushion layer 12 facing away from the first base substrate 101 is large, a first lens 11 of a sufficiently large size can be formed on the surface of the cushion layer 12. In an exemplary embodiment, the surface of the cushion layer 12 can be a shape that matches the convex surface or concave surface of the lens portion of the first lens 11, that is, the convex surface or concave surface of the lens portion of the first lens 11 can be attached to the entire surface of the cushion layer 12 to form a first lens 11 of a larger size, ensuring that the orthographic projection of the first lens 11 on the display substrate can cover the pixel area, thereby effectively regulating the light emitted from the pixel area.

[0046] The heat conducting layer can be made of heat conducting materials such as metal. The heat conducting layer can be a single layer structure or a multi-layer structure. Figure 1 In the illustrated example, the heat conducting layer includes a first heat conducting layer 102 and a second heat conducting layer 103 which are stacked.

[0047] According to some embodiments of the present application, a display device is also provided, including: a display substrate, including multiple pixel areas; a first microlens array, using the microlens array in the above embodiment, the first microlens array and the display substrate are arranged relative to each other, the multiple light-transmitting areas 100 of the first microlens array correspond to the positions of the multiple pixel areas, and the first lens 11 of the first microlens array is located on the side of the first base substrate 101 close to the display substrate.

[0048] Therefore, since the microlens array is temperature sensitive and can sense temperature changes and deform, it is possible to adjust the microlens array's control over light, for example, adjusting the transmittance. In this way, the pixels in the key display area of ​​the image are brighter, the current is larger, and more heat is generated. The microlens array senses the temperature increase in this area and can deform to increase transmittance. When the dynamic image shows this area, display enhancement will occur, thereby achieving the ability to dynamically adjust the corresponding display effect.

[0049] Each first lens 11 can correspond to a pixel area or multiple pixel areas of the display substrate, and can optically adjust the display light emitted by the corresponding pixel area, including transmittance and light transmission path. Exemplarily, multiple first lenses 11 can correspond to the positions of multiple pixel areas one by one, and can more effectively regulate the light emitted by each pixel area. Furthermore, the orthographic projection of the first lens 11 on the display substrate can be set to cover the pixel area, so as to be able to regulate the light emitted by the entire pixel area corresponding to the position.

[0050] In some embodiments, the first lens 11 may be a cylindrical lens, that is, the microlens array is a cylindrical lens array. By arranging the cylindrical lens array on the display side of the display substrate, naked-eye 3D display can be achieved.

[0051] The first micro lens array and the display substrate can be sealed and connected by a sealant, and the sealant can be, for example but not limited to, silica gel or polyurethane resin (PU glue).

[0052] The display substrate may be, for example, a quantum dot display substrate, an organic electroluminescent diode display substrate, or a liquid crystal display substrate.

[0053] In some embodiments, the display substrate may include a second base substrate 201, a pixel defining layer and a light-emitting film layer disposed on the second base substrate 201, wherein the pixel defining layer is used to define a plurality of pixel regions 200. The pixel defining layer is located in a spacing region 300 between two adjacent pixel regions 200. The pixel defining layer may be a single-layer structure or a multi-layer structure. The light-emitting film layer includes a plurality of light-emitting units 20 located in the plurality of pixel regions 200, and the light-emitting units 20 are used to emit display light.

[0054] Taking an organic light-emitting diode display substrate as an example, the light-emitting unit 20 is an organic light-emitting diode. Figure 1 In the example illustrated in , the pixel defining layer is a two-layer structure, including a first pixel defining layer 41 and a second pixel defining layer 42 stacked. The light-emitting film layer includes an organic electroluminescent diode arranged in each pixel area 200, and the organic electroluminescent diode includes an anode 21, an organic light-emitting layer 22 and a cathode 23. In some embodiments, the cathode 23 can cover multiple pixel areas 200, that is, multiple pixel areas 200 share a whole layer of cathode 23. The anodes 21 and the organic light-emitting layer 22 of multiple pixel areas 200 are separated by a pixel defining layer. The display substrate may include pixel areas 200 of multiple colors, and the organic light-emitting layers 22 in the pixel areas 200 of different colors emit light of different colors to achieve color display. Exemplarily, the display substrate may include a red pixel area 200, a green pixel area 200 and a blue pixel area 200, so that color display can be achieved through the three primary colors of RGB.

[0055] In some embodiments, the display substrate may further include a thin film transistor array layer 202 disposed on the second base substrate 201, the thin film transistor array layer 202 including a plurality of thin film transistors located in a plurality of pixel regions, and the thin film transistors are used to drive the light emitting film layer to emit display light. Taking an organic electroluminescent diode display substrate as an example, for each pixel region 200, the drain of the thin film transistor is electrically connected to the anode 21 of the organic electroluminescent diode, and is used to transmit a driving voltage to the anode 21 of the organic electroluminescent diode, thereby driving the organic electroluminescent diode to emit display light.

[0056] According to some embodiments of the present application, the display substrate may further include a second microlens array disposed on the light emitting side of the light emitting film layer, the second microlens array including a plurality of second lenses 30, and the plurality of second lenses 30 are respectively disposed in a plurality of pixel regions. That is to say, the display light emitted by the light emitting film layer first passes through the second microlens array and then is projected to the first microlens array, and the display light can generate sufficient optical path difference when it is transmitted in the second microlens array, which is conducive to effectively reducing the distance between the light emitting film layer and the first microlens array, and realizing a lighter and thinner product. When the first microlens array is a cylindrical lens array, the thickness of the naked eye 3D display product can be made lighter and thinner. And the display light can generate sufficient optical path difference when it is transmitted in the second microlens array, which can effectively increase the distance between the imaging point after being emitted from the cylindrical lens array and the cylindrical lens array, so that the stereoscopic picture presented by the naked eye 3D display is more prominent on the display side of the naked eye 3D display device, thereby improving the stereoscopic sense of the naked eye 3D display. In addition, the distance between the imaging point after being emitted from the cylindrical lens array and the cylindrical lens array increases, which can also reduce the probability of the naked-eye 3D display device generating moiré patterns and improve the display effect.

[0057] Thus, the inner lens of the pixel (the second micro lens array) and the outer lens of the pixel (the first micro lens array) are combined to form a lens group. Through the synergistic effect of the lens group, the 3D display effect can be enhanced, making the naked eye 3D product thinner and lighter, easier to carry and use. At the same time, the refraction principle of the 3D prism can be used to achieve the 3D display effect with a thinner lens.

[0058] In some embodiments, the second lens 30 may be a concave lens to increase the viewing angle and reduce image crosstalk, thereby improving user experience.

[0059] exist Figure 1 In the illustrated example, a hydrophilic film layer may be formed on the surface of the cathode 23, and a groove may be formed on the cathode 23 at a position corresponding to each pixel region. In this case, an inkjet printing process may be used to form the second lens 30 on the cathode 23. After the inkjet print head prints the organic solution to each pixel region, the organic solution tends to adhere to the sidewall of the groove having the hydrophilic film layer on the surface, so that after the organic solution is solidified, the surface of the obtained second lens 30 is an arc-shaped concave surface that is concave toward the second base substrate 201, forming a concave lens.

[0060] It is understandable that the method for making the second lens is not limited to the above method. For example, a flat layer 104 may be formed on the cathode, and a plurality of isolation columns made of a hydrophilic material may be formed on the flat layer 104. The plurality of isolation columns are arranged in the spacing area 300 between the pixel areas. After the inkjet print head prints the organic solution to each pixel area 200, the organic solution tends to the side wall of the isolation column, so that after the organic solution is solidified, the surface of the obtained second lens is an arc-shaped concave surface that is concave toward the side of the second base substrate 201, forming a concave lens.

[0061] It should be noted that the second lens of the second microlens array may also be a convex lens. The second microlens array may also be a combination of a concave lens and a convex lens, that is, concave lenses are arranged in some pixel areas, convex lenses are arranged in other pixel areas, or a combination of concave lenses and convex lenses are arranged in the same pixel area.

[0062] According to some embodiments of the present application, the first microlens array plate may further include: a heat-conducting layer disposed on the plurality of first lenses, the heat-conducting layer being located between the plurality of first lenses and the display substrate. The heat-conducting layer has good thermal conductivity and can quickly conduct heat from the display substrate to the first lenses to achieve a quick response.

[0063] The heat conducting layer can be made of heat conducting materials such as metal, etc. The heat conducting layer can be a single layer structure or a multi-layer structure.

[0064] Combination Figure 1 and Figure 5As shown, according to some embodiments of the present application, a method for manufacturing a microlens array is also provided, comprising:

[0065] Step S510, forming an isolation layer 10 on the first base substrate 101, wherein the isolation layer 10 defines a plurality of light-transmitting regions 100 on the first base substrate 101;

[0066] Step S520 , forming a plurality of first lenses 11 in the plurality of light-transmitting regions 100 , respectively. The material used to prepare the first lenses 11 includes a temperature-sensitive material so that the first lenses can sense temperature changes and deform.

[0067] Therefore, the microlens array is temperature sensitive and can sense temperature changes and deform, so that the microlens array can adjust the light regulation effect, for example, adjust the light transmission path and adjust the transmittance. In this way, in the key display area of ​​the image, because the pixels are brighter, the current is larger, and more heat is generated, the microlens array can sense the temperature rise in this area in real time and deform to increase the transmittance. The higher the temperature, the greater the deformation of the microlens array, resulting in display enhancement. Therefore, the deformation degree of the microlens array can be adjusted according to the needs of the display picture, and the corresponding display effect can be dynamically adjusted to make the picture more vivid and realistic.

[0068] According to some embodiments of the present application, forming a plurality of first lenses 11 in a plurality of light-transmitting regions 100 respectively includes:

[0069] preparing a gel solution including a temperature-sensitive material;

[0070] Inkjet printing a gel solution in the plurality of light-transmitting regions 100;

[0071] curing the gel solution;

[0072] The solidified gel solution is patterned to form a plurality of first lenses.

[0073] Thus, a plurality of lenses can be prepared by using a gel solution, and the process is simple and easy to implement.

[0074] In some embodiments, preparing a gel solution including a temperature sensing material comprises:

[0075] The temperature-sensitive material gelling agent, plasticizer and solvent are mixed in a preset ratio and stirred evenly to form a gel solution.

[0076] The gel solution prepared by the method has a good curing effect and can enhance the flexibility and transparency of the gel, thereby ensuring that the microlens array has good optical properties.

[0077] After the gel solution is prepared, the inkjet printing technology is used to form a micro-droplet array in the multiple light-transmitting areas 100 on the first base substrate 101. The size, position and shape of the micro-droplets can be accurately controlled according to the design parameters of the first lens 11. Before inkjet printing, the first base substrate 101 can be cleaned to ensure that the surface of the first base substrate 101 is clean and free of impurities to avoid affecting the optical performance of the first lens.

[0078] In some embodiments, the microlens array of the inkjet-printed gel solution can be placed under an ultraviolet lamp of a desired wavelength for curing to form a microlens array. During the curing process, parameters such as the intensity of the ultraviolet light, the irradiation time, and the temperature can be precisely controlled to improve the curing efficiency and effect.

[0079] In some embodiments, before forming the first lens in the light-transmitting region 100, a hydrogel, such as ethyl formate hydrogel or methyl propionate hydrogel, may be inkjet printed in the light-transmitting region 100. After the hydrogel is cured, the cured hydrogel may be embossed by a master plate to form a cushion layer 12 having a concave or convex surface. Subsequently, a microdroplet array may be inkjet printed on the surface of the cushion layer 12.

[0080] In some embodiments, after the microdroplet array is solidified, the solidified microdroplet array can be deformed by a nanoimprint process to form a first lens of a desired shape and size. The process of the nanoimprint process may include: making a master: making a high-precision master according to the design parameters of the first lens. The master can be in the shape of a convex lens or a concave lens for subsequent imprinting processes. The above-mentioned imprinting of the solidified hydrogel can also use this master.

[0081] Spin-coating photoresist: Spin-coat a uniform layer of photoresist on the micro-droplet array. The thickness and uniformity of the photoresist have an important impact on the subsequent imprinting effect.

[0082] Nanoimprinting: Imprinting photoresist with a master to form a microlens array that matches the shape of the master. During the imprinting process, parameters such as imprinting pressure, speed, and temperature need to be controlled.

[0083] Curing and demolding: Use ultraviolet light to cure the imprinted photoresist, then remove the master, and use etching solution to remove the photoresist to obtain a complete microlens array.

[0084] It is understandable that other graphic processing techniques may also be used to process the solidified micro-droplet array to form a first lens of a desired shape and size.

[0085] In other embodiments, the isolation layer may be made of a hydrophilic material. In this case, an inkjet printing process may be used to form a cushion layer in multiple light-transmitting areas. After the inkjet print head prints a hydrogel to each light-transmitting area, the hydrogel tends to the side wall of the isolation layer corresponding to the light-transmitting area, so that after the hydrogel is cured, the surface of the cushion layer is an arc-shaped concave surface that is recessed toward the first substrate. Similarly, in the process of forming a first lens in multiple light-transmitting areas using an inkjet printing process, after the inkjet print head prints an organic solution to each light-transmitting area, the organic solution tends to the side wall of the isolation layer corresponding to the light-transmitting area, so that after the organic solution is cured, the surface of the first lens is an arc-shaped concave surface that is recessed toward the first substrate, forming a concave lens. Similarly, the isolation layer may also be made of a hydrophobic material. In this case, an inkjet printing process can be used to form a cushion layer in multiple light-transmitting areas. After the inkjet print head prints hydrogel to each light-transmitting area, the hydrogel is alienated from the side wall of the isolation layer corresponding to the light-transmitting area, so that after the hydrogel is solidified, the surface of the cushion layer obtained is an arc-shaped convex surface that is raised away from the first substrate. Similarly, an inkjet printing process can be used to form a first lens in multiple light-transmitting areas. After the inkjet print head prints an organic solution to each light-transmitting area, the organic solution is alienated from the side wall of the isolation layer corresponding to the light-transmitting area, so that after the organic solution is solidified, the surface of the first lens obtained is an arc-shaped convex surface that is raised away from the first substrate, forming a convex lens. In the case where the first lens is a combination of a concave lens and a convex lens, the isolation layer can be set to a double-layer structure. By reasonably selecting each layer structure to be made of hydrophilic material or hydrophobic material, a desired combination of concave lenses and convex lenses can be formed, and the specific principle is similar to the above.

[0086] The hydrophilic material may include at least one of the following: polyimide, bisphenol A polycarbonate, a polymer containing an alkyl group in the main chain, and a polymer containing a cyclic rigid structure in the main chain. The polymer containing an alkyl group in the main chain may be, for example, a polymer such as polyacrylic acid, polyacrylamide, polyvinyl alcohol, polyurethane, polyphthalamide, and their derivatives. The polymer containing a cyclic rigid structure in the main chain may be, for example, a polymer such as polybenzimidazole, polyphenylquinoxaline, and their derivatives.

[0087] The hydrophobic material may include at least one of: polysiloxane, fluorine-containing polyolefin, fluorine-containing polyalkylene oxide.

[0088] According to some embodiments of the present application, the method for manufacturing a microlens array may further include: forming a heat-conducting layer on the plurality of first lenses. The heat-conducting layer has good thermal conductivity and can quickly conduct heat to the lens to achieve a rapid response.

[0089] The heat conducting layer can be made of heat conducting materials such as metals, etc. The heat conducting layer can be a single layer structure or a multi-layer structure.

[0090] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in this disclosure can be performed in parallel, sequentially or in different orders, as long as the desired results of the technical solutions disclosed in this disclosure can be achieved, and this document does not limit this.

[0091] Although the embodiments or examples of the present disclosure have been described with reference to the accompanying drawings, it should be understood that the above-mentioned methods, systems and devices are merely exemplary embodiments or examples, and the scope of the present invention is not limited by these embodiments or examples, but only by the claims after authorization and their equivalent scope. Various elements in the embodiments or examples can be omitted or replaced by their equivalent elements. In addition, each step can be performed in an order different from that described in the present disclosure. Further, the various elements in the embodiments or examples can be combined in various ways. It is important that with the evolution of technology, many elements described herein can be replaced by equivalent elements that appear after the present disclosure.

Claims

1. A microlens array, characterized in that: include: substrate substrate; An isolation layer, defining a plurality of light-transmitting areas on the base substrate; A plurality of first lenses are respectively arranged in the plurality of light-transmitting regions, and the material used to make the first lenses includes a temperature-sensitive material so that the first lenses can sense temperature changes and deform.

2. The microlens array plate according to claim 1, characterized in that: Also includes: A heat-conducting layer is disposed on the plurality of first lenses.

3. The microlens array plate according to claim 1, characterized in that: The first lens is a cylindrical lens, including a cylindrical portion and a lens portion, and the material used to prepare the cylindrical portion and / or the lens portion includes a temperature-sensitive material.

4. The microlens array plate according to claim 1, characterized in that: The first lens is made of a gel solution including a temperature-sensitive material.

5. The microlens array plate according to claim 1, characterized in that: The temperature-sensitive material includes polyvinylidene fluoride.

6. A display device, characterized in that: include: A display substrate including a plurality of pixel regions; A first microlens array, comprising the microlens array of any one of claims 1 to 5, wherein the first microlens array and the display substrate are arranged relative to each other, a plurality of light-transmitting areas of the first microlens array correspond to positions of a plurality of pixel areas, and a first lens of the first microlens array is located on a side of the base substrate close to the display substrate.

7. The display device according to claim 6, characterized in that: The display substrate comprises: A luminous film layer, used for emitting display light; The second microlens array arranged on the light emitting side of the light emitting film layer comprises a plurality of second lenses, and the plurality of second lenses are respectively arranged in the plurality of pixel areas.

8. A method for manufacturing a microlens array, characterized in that: include: forming an isolation layer on the base substrate, wherein the isolation layer defines a plurality of light-transmitting areas on the base substrate; A plurality of first lenses are respectively formed in the plurality of light-transmitting regions, and the material used to make the first lenses includes a temperature-sensitive material so that the first lenses can sense temperature changes and deform.

9. The manufacturing method according to claim 8, characterized in that: Forming a plurality of first lenses respectively in the plurality of light-transmitting regions comprises: preparing a gel solution including a temperature-sensitive material; inkjet printing the gel solution in the plurality of light-transmitting areas; Performing a solidification treatment on the gel solution; The solidified gel solution is patterned to form the plurality of first lenses.

10. The manufacturing method according to claim 8, characterized in that: The preparation of the gel solution including the temperature-sensitive material includes: The temperature-sensitive material gelling agent, plasticizer and solvent are mixed in a preset ratio and stirred evenly to form the gel solution.

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