Method for processing a texture

Abstract

The application discloses a texture processing method, which comprises the following steps: calculating a curved surface model of a microlens layer through the thickness of a laminated layer and geometric parameters of the microlens, and determining a microlens layer gray scale drawing according to the pattern model; determining corresponding micro-pattern layer gray scale drawings according to preset suspension effect patterns and the geometric parameters of the microlens; respectively exposing and developing a glass substrate coated with photoresist according to the gray scale values of the microlens layer gray scale drawing and the micro-pattern layer gray scale drawing; respectively transferring the developed glass substrates using PET films, and then transferring the glass substrates to a PC texture mold after aging treatment; finally, transferring the glass substrates to PET films to obtain a periodic PET film, and then performing electroplating and ink covering operations to obtain a holographic suspension micro-nano texture product. Based on the application, the periodic structure texture product is obtained through the above processing method, and the holographic suspension effect and the product anti-counterfeiting effect are enhanced.

Description

Technical Field

[0001] This invention relates to the field of micro-nano texture processing, and more particularly to a method for processing textures. Background Technology

[0002] Existing decorative textures for films used in mobile phones and other electronic products generate exposure patterns by directly mapping conventional micro / nano grating textures to effect patterns designed using Photoshop. Shadows and substrates are then added to the edges of the patterns on the exposure patterns to create the visual effect of the patterns floating in mid-air. However, this floating effect has a limited perspective and varies significantly from different angles. Furthermore, the light and shadow of existing textures are manipulated by controlling parameters such as the angle, duty cycle, and depth of the micro / nano gratings. This information is highly reproducible and easily replicated.

[0003] Therefore, how to avoid the shortcomings of micro-nano grating texture patterns, such as a single viewing angle, large differences between different viewing angles, strong reproducibility, and easy imitation, is an urgent problem to be solved. Summary of the Invention

[0004] The main purpose of this application is to provide a texture processing method that aims to solve the problems of how to avoid the floating effect of micro-nano grating texture patterns, such as single viewing angle, strong reproducibility, and easy imitation.

[0005] To achieve the above objectives, this application provides a texture processing method, applied in the field of micro-nano texture processing technology, the texture processing method comprising the following steps:

[0006] Based on the preset magnification, preset layer thickness, preset microlens geometric parameters, and preset levitation effect pattern, grayscale images of the microlens layer and the microtext layer are obtained.

[0007] Based on the grayscale values ​​of the microlens layer grayscale pattern and the microtext layer grayscale pattern, two glass substrates coated with photoresist are exposed respectively, and the exposed glass substrates are developed.

[0008] The two exposed and developed glass substrates are transferred to two PET films respectively to obtain the first microlens layer PET texture mold and the first micro-image layer PET texture mold.

[0009] The first microlens layer PET texture mold and the first micro-image layer PET texture mold are transferred to a PC mold respectively. The PC texture mold obtained after the transfer is used to perform double-sided transfer on the untreated PET film to obtain a PET film with periodic microlenses and array image type micro-image superposition.

[0010] Electroplating and ink coating operations are performed on the PET film with the periodic microlens and array image type microtext overlay to obtain a product with holographic suspended micro-nano texture.

[0011] Optionally, the step of obtaining the grayscale images of the microlens layer and the microtext layer based on a preset magnification, a preset stacking thickness, preset microlens geometric parameters, and a preset levitation effect pattern includes:

[0012] The surface model of the microlens layer is obtained by calculation based on the preset magnification, preset stack thickness, and preset microlens geometric parameters.

[0013] The corresponding micro-text and image layer is determined based on the preset floating effect pattern and the magnification factor.

[0014] Based on the microtext layer and the surface model, determine the grayscale drawing of the microlens layer and the grayscale drawing of the microtext layer.

[0015] Optionally, the step of transferring the first microlens layer PET texture mold and the first micro-image layer PET texture mold to the PC mold respectively includes:

[0016] The first microlens layer PET texture mold and the first micro-image layer PET texture mold are subjected to aging treatment.

[0017] Optionally, the step of exposing the two photoresist-coated glass substrates separately based on the grayscale values ​​of the microlens layer grayscale pattern and the microtext layer grayscale pattern includes:

[0018] The laser direct-write exposure machine uses laser energy to expose the two glass substrates coated with photoresist based on the grayscale values ​​of the grayscale drawings of the microlens layer and the microtexture layer.

[0019] Optionally, the step of determining the corresponding micro-text / image layer based on the preset floating effect pattern and the magnification factor includes:

[0020] The size of the microtext layer grayscale drawing is calculated based on the magnification of the microlens and the size of the preset floating effect pattern.

[0021] Based on the size of the microtext layer grayscale drawing and the preset floating effect pattern, an array image type microtext layer grayscale drawing is generated.

[0022] Optionally, the step of developing the two exposed glass substrates includes:

[0023] The two exposed glass substrates are placed in a weakly alkaline developing solution for a preset time period.

[0024] After removing the two glass substrates that were placed in the weakly alkaline developing solution, rinse them in pure water.

[0025] The two cleaned glass substrates are coated with a film.

[0026] Optionally, the step of transferring the two exposed and developed glass substrates onto two PET films respectively to obtain the first microlens layer PET texture mold and the first micro-image layer PET texture mold includes:

[0027] The two developed glass substrates are coated with UV adhesive;

[0028] The two PET films are then applied to the two glass substrates coated with UV adhesive.

[0029] Two glass substrates covered by two PET films are rolled with silicone rollers at a preset speed and pressure.

[0030] Two glass substrates covered by two rolled PET films are irradiated with a curing lamp, wherein the curing lamp includes at least a mercury lamp and a halogen lamp;

[0031] The two glass substrates covered by the two cured PET films are separated to obtain the first microlens layer PET texture mold and the first micro-image layer PET texture mold.

[0032] Optionally, the PET film with the superimposed periodic microlens and array image microtext layers sequentially includes an array image microtext layer, a PET substrate layer, and a periodic microlens layer, wherein the image units of the array image microtext layer and the microlenses of the periodic microlens layer correspond one-to-one.

[0033] Optionally, the transfer process is a nanoimprinting process.

[0034] Optionally, the radius of curvature of the microlens in the periodic microlens layer is twice the thickness of the stack.

[0035] The texture processing method proposed in this application specifically involves obtaining a grayscale image of a microlens layer and a grayscale image of a microtext layer based on preset magnification, preset stacking thickness, preset microlens geometric parameters, and preset levitation effect pattern; exposing two glass substrates coated with photoresist to the grayscale images of the microlens layer and the microtext layer, and developing the exposed glass substrates; transferring the exposed and developed glass substrates to two PET films to obtain a first microlens layer PET texture mold and a first microtext layer PET texture mold; transferring the first microlens layer PET texture mold and the first microtext layer PET texture mold to a PC mold; using the PC texture mold obtained after transfer to perform double-sided transfer on the unprocessed PET film to obtain a PET film with periodic microlenses and array image type microtext overlays; and performing electroplating and ink covering operations on the PET film with periodic microlenses and array image type microtext overlays to obtain a holographic levitation micro-nano texture product. The holographic levitation micro-nano texture product achieved in this application realizes a holographic levitation effect that can float, sink, and zoom in and out within a full 360° angle range. The levitation effect changes with the human eye's viewing angle, increasing the product's visual impact and sensory experience. Furthermore, since the levitation effect is affected by multiple parameters, the product with the holographic levitation micro-nano texture has strong anti-counterfeiting properties. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the functional modules of the terminal equipment to which the texture processing apparatus of this application belongs;

[0037] Figure 2 This is a flowchart illustrating a first exemplary embodiment of the texture processing method of this application;

[0038] Figure 3 This is a schematic flowchart of a second exemplary embodiment of the texture processing method of this application;

[0039] Figure 4 This is a flowchart illustrating a third exemplary embodiment of the texture processing method of this application.

[0040] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0041] It should be understood that the specific implementation examples described herein are merely for illustrative purposes and are not intended to limit the scope of this application.

[0042] The main solution of this application embodiment is to obtain grayscale images of the microlens layer and the microtexture layer based on preset magnification, preset stack thickness, preset microlens geometric parameters, and preset levitation effect patterns. Then, a laser direct-write exposure machine is used to expose two glass substrates coated with photoresist by emitting corresponding laser energy based on the grayscale values ​​of the microlens layer and the microtexture layer. Based on this solution, by obtaining the grayscale images of the microlens layer and the microtexture layer through preset parameters, and emitting laser energy with corresponding grayscale values ​​through the laser direct-write exposure machine according to the grayscale values ​​of the images, a fast and accurate technical support for processing holographic levitation micro / nano textures is achieved.

[0043] Specifically, refer to Figure 1 , Figure 1 This is a schematic diagram of the functional modules of the terminal device to which the texture processing apparatus of this application belongs. The texture processing apparatus is a device based on the terminal device that can quickly and accurately provide technical support for processing holographic suspended micro-nano textures, and it can be carried on the terminal device in the form of hardware or software.

[0044] In this embodiment, the terminal device to which the texture processing device belongs includes at least an output module 110, a processor 120, a memory 130, and a communication module 140.

[0045] The memory 130 stores the operating system and texture processing program. The texture processing device can obtain grayscale images of the microlens layer and the microtexture layer according to preset magnification, preset stack thickness, preset microlens geometric parameters, and preset levitation effect pattern. Information such as the laser direct-write exposure machine emitting corresponding laser energy to expose the two photoresist-coated glass substrates based on the grayscale values ​​of the microlens layer and the microtexture layer grayscale images is stored in the memory 130. The output module 110 can be a display screen, etc. The communication module 140 can include a WIFI module, a mobile communication module, and a Bluetooth module, etc., and communicates with external devices or servers through the communication module 140.

[0046] The texture processing program stored in memory 130, when executed by the processor, performs the following steps:

[0047] Based on the preset magnification, preset layer thickness, preset microlens geometric parameters, and preset levitation effect pattern, grayscale images of the microlens layer and the microtext layer are obtained.

[0048] The laser direct-write exposure machine uses laser energy to expose the two glass substrates coated with photoresist based on the grayscale values ​​of the grayscale drawings of the microlens layer and the microtexture layer.

[0049] Based on, but not limited to, the terminal device architecture described above, this application proposes method embodiments.

[0050] Reference Figure 2 , Figure 2 This is a flowchart illustrating a first exemplary embodiment of a texture processing method. The texture processing method includes:

[0051] Step S100: Based on the preset magnification, preset stacking thickness, preset microlens geometric parameters, and preset levitation effect pattern, obtain the grayscale drawing of the microlens layer and the grayscale drawing of the microtext layer.

[0052] Specifically, a surface model of the microlens layer is obtained by calculation based on a preset magnification, a preset layer thickness, and preset microlens geometric parameters; a corresponding microtext layer is determined based on a preset floating effect pattern and the magnification; and a grayscale drawing of the microlens layer and a grayscale drawing of the microtext layer are determined based on the microtext layer and the surface model.

[0053] Furthermore, the preset stack thickness H refers to the thickness between the microlens layer and the micrographic layer, including the adhesive thickness and the PET substrate thickness; the lens height and curvature parameter R of the microlens layer are determined by the stack thickness H, and the relationship between the stack thickness H and the microlens curvature radius R is R = 2 * H; considering the curvature of the microlens surface, the thicker the graphic layer and the lens layer, the larger the curvature radius of the microlens and the flatter the reflective surface.

[0054] The microlens surface shape distribution equation is as follows:

[0055]

[0056] Where c is the curvature of the microlens surface, which is obtained by reversing the radius of curvature; the square of r is the sum of the squares of the coordinates of the microlens surface projected onto the two-dimensional plane; and k is adjusted according to the requirements so that the obtained microlens surface distribution reaches the preset magnification.

[0057] Furthermore, the size of a single periodic unit of microtext is determined by the size and magnification of the preset floating effect pattern, and the microtext pattern is arranged according to the micrographic array, with only a small difference in the text layer information contained in adjacent periods.

[0058] Furthermore, the size of the grayscale image of the periodic microlens arrangement in the microlens layer is slightly larger than the size of the grayscale image of the microtext layer, so that the microlens layer produces a better reflection effect on the pattern of the microtext layer.

[0059] Furthermore, a portion of microtext information can be included in a single microtext cycle, and a complete microtext layer must contain all microtext information, with only minor differences in the text layer information contained in adjacent cycles.

[0060] Step S101: Based on the grayscale values ​​of the microlens layer grayscale drawing and the microtext layer grayscale drawing, expose the two glass substrates coated with photoresist respectively, and develop the two exposed glass substrates.

[0061] Specifically, the grayscale values ​​of the microlens layer grayscale pattern and the microtext layer grayscale pattern can be used by a laser direct-write exposure machine to emit corresponding laser energy based on the grayscale values. The laser direct-write exposure machine then exposes the two glass substrates coated with photoresist based on the grayscale values ​​of the microlens layer grayscale pattern and the microtext layer grayscale pattern. After exposure, the two glass substrates are placed in a weakly alkaline developing solution for a preset time period. After being placed in the weakly alkaline developing solution, the two glass substrates are removed and rinsed in pure water. The rinsed glass substrates are then stored with a protective film, which is removed for subsequent use.

[0062] Step S102: The two exposed and developed glass substrates are transferred to two PET films respectively to obtain the first microlens layer PET texture mold and the first micro-image layer PET texture mold.

[0063] Specifically, two glass substrates after development are coated with UV adhesive; two PET films are then placed on the two glass substrates coated with UV adhesive; the two glass substrates covered with the PET films are rolled using a silicone roller at a preset speed and pressure; the two glass substrates covered with the rolled PET films are irradiated with a curing lamp; and the two glass substrates covered with the cured PET films are separated to obtain a first microlens layer PET texture mold and a first micro-image layer PET texture mold.

[0064] Step S103: Transfer the first microlens layer PET texture mold and the first micro-image layer PET texture mold to the PC mold respectively. Use the PC texture mold obtained after transfer to perform double-sided transfer on the untreated PET film to obtain a PET film with periodic microlenses and array image type micro-image superposition.

[0065] Specifically, before transferring the first microlens layer PET texture mold and the first micro-image layer PET texture mold, an aging treatment is required. The aging treatment strengthens the substrate hardness of the first microlens layer PET texture mold and the first micro-image layer PET texture mold, thereby facilitating subsequent transfer operations and storage. The transfer process used in this embodiment is nanoimprinting, which facilitates transfer and storage by transferring to a PC material mold. Therefore, PC material is required for transfer. The nanoimprinting process is used to transfer two PC material texture molds onto a PET substrate on both sides, thereby obtaining a PET film with periodic microlenses and array image type micro-image superposition.

[0066] Furthermore, during the transfer process, when transferring the PC mold of the microlens layer and the micrographic layer to the PET substrate, they must correspond one-to-one according to their respective periodic arrays. The resulting PET film, which is a superposition of periodic microlenses and array image micrographics, sequentially includes an array image micrographic layer, a PET substrate layer, and a periodic microlens layer. The microlenses are the bottom layer, and the micrographics are the top layer. The micrographic layer is closest to the human eye. Furthermore, the microlens layer is located at the bottom of the product structure. It is treated with an adhesive layer, followed by an ink layer and an electroplating layer. The electroplating layer is generally 50-200nm, and the ink layer is 10-20um. The PET substrate is 75-100um, the microlenses are generally 12um, and the micrographic layer is obtained by treating the adhesive layer and is about 2-3um. The specific thickness can be calculated according to actual needs.

[0067] Step S104: Electroplating and ink coating operations are performed on the PET film with the periodic microlens and array image type microtext overlay to obtain a holographic suspended micro-nano textured product.

[0068] Specifically, the periodic microlens surface is electroplated and covered with ink to ensure total internal reflection of light after incident on the periodic microlens surface, thereby ensuring the reflection effect of the array image type microtext. There will be slight differences in the image information in each adjacent unit of the periodic unit of the microtext layer, making it difficult to imitate.

[0069] This embodiment, through the above-described scheme, specifically obtains grayscale images of the microlens layer and the microtexture layer based on preset magnification, preset stacking thickness, preset microlens geometric parameters, and preset levitation effect patterns. Based on the grayscale values ​​of these images, two glass substrates coated with photoresist are exposed and developed. The exposed and developed glass substrates are then transferred to two PET films to obtain a first microlens layer PET texture mold and a first microtexture layer PET texture mold. These molds are then transferred to a PC mold, and the resulting PC texture mold is used to perform double-sided transfer on the untreated PET film, resulting in a PET film with periodic microlenses and array image-type microtext overlays. Electroplating and ink undercoating are then performed on the PET film with the periodic microlenses and array image-type microtext overlays to obtain a holographic levitation micro-nano textured product. Based on this solution, the microlens layer and micro-image layer are determined by preset magnification effect, levitation effect and stacking thickness, and then transfer and bonding are performed to produce holographic levitation micro-nano textured products with strong levitation effect and strong anti-counterfeiting features.

[0070] Furthermore, referring to Figure 3 , Figure 3 This is a flowchart illustrating a second exemplary embodiment of a texture processing method. The step of determining the corresponding microtext layer based on a preset floating effect pattern and the magnification factor includes:

[0071] Step S1101: Calculate the size of the microtext layer grayscale drawing based on the magnification of the microlens and the size of the preset floating effect pattern.

[0072] Specifically, the size of the preset floating effect divided by the magnification factor is the size of the grayscale drawing of the micro-text layer.

[0073] Step S1102: Generate an array image type micro-text layer grayscale drawing based on the size of the micro-text layer grayscale drawing and the preset floating effect pattern.

[0074] Specifically, to ensure the levitation effect, the preset levitation effect pattern is segmented, and the graphic information in each adjacent unit of the micro-graphic layer has slight differences, arranged in an array as follows: Figure 4 As shown.

[0075] This embodiment, through the above-described scheme, specifically calculates the size of the microtext layer grayscale image based on the magnification of the microlens and the size of the preset levitation effect pattern; then, based on the size of the microtext layer grayscale image and the preset levitation effect pattern, generates an array image-type microtext layer grayscale image. Based on this scheme, the microtext layer is determined by the magnification and the size of the levitation effect pattern, providing data support for the subsequent precise processing of holographic levitation micro / nano textures.

[0076] Furthermore, embodiments of this application also propose a texture processing apparatus, the texture processing apparatus comprising:

[0077] The calculation module is used to obtain grayscale images of the microlens layer and the microtext layer based on preset magnification, preset stacking thickness, preset microlens geometric parameters, and preset levitation effect pattern.

[0078] The control module is used to expose the two glass substrates coated with photoresist by emitting corresponding laser energy based on the grayscale values ​​of the grayscale drawings of the microlens layer and the microtexture layer using a laser direct-write exposure machine.

[0079] Furthermore, this application also proposes a terminal device, which includes a memory, a processor, and a texture processing program stored in the memory and executable on the processor. When the texture processing program is executed by the processor, it implements the steps of the texture processing method.

[0080] Since the processing program of this texture adopts all the technical solutions of all the aforementioned embodiments when it is executed by the processor, it has at least all the beneficial effects brought about by all the technical solutions of all the aforementioned embodiments, which will not be repeated here.

[0081] Furthermore, embodiments of this application also propose a readable storage medium storing a program, wherein the texture processing program, when executed by a processor, implements the steps of the texture processing method as described above.

[0082] Since the processing program of this texture adopts all the technical solutions of all the aforementioned embodiments when it is executed by the processor, it has at least all the beneficial effects brought about by all the technical solutions of all the aforementioned embodiments, which will not be repeated here.

[0083] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or system. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or system that includes that element.

[0084] The sequence numbers of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0085] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) as described above, and includes several instructions to cause a terminal device (which may be a mobile phone, computer, server, controlled terminal, or network device, etc.) to execute the methods of each embodiment of this application.

[0086] The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A method for processing textures, characterized in that, The texture processing method includes the following steps: Based on the preset magnification, preset layer thickness, preset microlens geometric parameters, and preset levitation effect pattern, grayscale images of the microlens layer and the microtext layer are obtained. Based on the grayscale values ​​of the microlens layer grayscale pattern and the microtext layer grayscale pattern, two glass substrates coated with photoresist are exposed respectively, and the exposed glass substrates are developed. The two exposed and developed glass substrates are transferred to two PET films respectively to obtain the first microlens layer PET texture mold and the first micro-image layer PET texture mold. The first microlens layer PET texture mold and the first micro-image layer PET texture mold are subjected to aging treatment; The first microlens layer PET texture mold and the first micro-image layer PET texture mold are transferred to a PC mold respectively. The PC texture mold obtained after the transfer is used to perform double-sided transfer on the untreated PET film to obtain a PET film with periodic microlenses and array image type micro-image superposition. Electroplating and ink coating operations are performed on the PET film with the periodic microlens and array image type microtext overlay to obtain a product with holographic suspended micro-nano texture.

2. The texture processing method according to claim 1, characterized in that, The steps for obtaining the grayscale images of the microlens layer and the microtext layer based on preset magnification, preset layer thickness, preset microlens geometric parameters, and preset levitation effect pattern include: The surface model of the microlens layer is obtained by calculation based on the preset magnification, preset stack thickness, and preset microlens geometric parameters. The corresponding micro-text and image layer is determined based on the preset floating effect pattern and the magnification factor. Based on the microtext layer and the surface model, determine the grayscale drawing of the microlens layer and the grayscale drawing of the microtext layer.

3. The texture processing method according to claim 1, characterized in that, The step of exposing two glass substrates coated with photoresist respectively based on the grayscale values ​​of the microlens layer grayscale pattern and the microtext layer grayscale pattern includes: The laser direct-write exposure machine uses laser energy to expose the two glass substrates coated with photoresist based on the grayscale values ​​of the grayscale drawings of the microlens layer and the microtexture layer.

4. The texture processing method according to claim 2, characterized in that, The step of determining the corresponding micro-text layer based on the preset floating effect pattern and the magnification factor includes: The size of the microtext layer grayscale drawing is calculated based on the magnification of the microlens and the size of the preset floating effect pattern. Based on the size of the microtext layer grayscale drawing and the preset floating effect pattern, an array image type microtext layer grayscale drawing is generated.

5. The texture processing method according to claim 1, characterized in that, The step of developing the two exposed glass substrates includes: The two exposed glass substrates are placed in a weakly alkaline developing solution for a preset time period. After removing the two glass substrates that were placed in the weakly alkaline developing solution, rinse them in pure water. The two cleaned glass substrates are coated with a film.

6. The texture processing method according to claim 1, characterized in that, The step of transferring the two exposed and developed glass substrates onto two PET films respectively to obtain the first microlens layer PET texture mold and the first micro-image layer PET texture mold includes: The two developed glass substrates are coated with UV adhesive; The two PET films are then applied to the two glass substrates coated with UV adhesive. Two glass substrates covered by two PET films are rolled with silicone rollers at a preset speed and pressure. Two glass substrates covered by two rolled PET films are irradiated with a curing lamp, wherein the curing lamp includes at least a mercury lamp and a halogen lamp; The two glass substrates covered by the two cured PET films are separated to obtain the first microlens layer PET texture mold and the first micro-image layer PET texture mold.

7. The texture processing method according to claim 1, characterized in that, The PET film with the superimposed periodic microlens and array image microtext layers sequentially includes an array image microtext layer, a PET substrate layer, and a periodic microlens layer, wherein the image units of the array image microtext layer and the microlenses of the periodic microlens layer correspond one-to-one.

8. The method for processing textures according to any one of claims 1-4, characterized in that, The transfer process is a nanoimprinting process.

9. The method for processing textures according to any one of claims 1-7, characterized in that, The radius of curvature of the microlens in the periodic microlens layer is twice the thickness of the stack.

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