A diaphragm manufacturing method, diaphragm, shell and electronic device

Abstract

The present disclosure provides a film manufacturing method, a film, a shell and an electronic device. The manufacturing method comprises: forming a microlens layer and a graphic accommodating layer on both sides of a first transparent substrate by using an embossing process. The surface of the microlens layer comprises a plurality of focusing lens units, and the surface of the graphic accommodating layer comprises a plurality of grooves. The positions of the grooves correspond to the positions of the focusing lens units one by one. The graphic filling structure is filled in the grooves. The microlens layer, the first transparent substrate, the graphic accommodating layer and the graphic filling structure constitute a suspended imaging layer. A coating layer covering the microlens layer is formed. An ink layer covering the coating layer is formed. The microlens layer and the graphic accommodating layer are formed by the embossing process, so as to improve the alignment accuracy of the focusing lens units in the microlens layer and the grooves in the graphic accommodating layer, and improve the overall presentation effect of the suspended imaging layer in the film. At the same time, the manufacturing method has a simple process, high processing efficiency and low manufacturing cost, and is conducive to industrial production.

Description

Technical Field

[0001] This disclosure relates to the field of electronic equipment technology, and in particular to a method for manufacturing a diaphragm, the diaphragm, the housing, and an electronic device. Background Technology

[0002] With the widespread use of electronic devices, in addition to providing basic communication and networking functions, electronic devices have gradually come to serve as decorative items. To ensure that the appearance of electronic devices meets users' needs, various patterns, textures, colors, or floating effects are usually set on the casing of the electronic devices.

[0003] To achieve the floating pattern effect on the casing, a microlens structure is typically incorporated inside the casing. This structure focuses external light, refracting it to create a pattern corresponding to the microlens' location, thus producing the floating effect. Currently, the process of forming microlenses involves sequentially exposing, developing, and etching a glass substrate coated with thermoplastic resin to form an array of multiple cylinders on the resin. The resin is then heated under specific conditions, causing partial melting and transforming the cylinders into microspheres, followed by cooling to obtain the microlens structure.

[0004] However, when forming microlens structures using the above method, the thermoplastic resin is difficult to shape, and the positions of the microlens structure and the pattern cannot correspond well, affecting the presentation of the levitation pattern effect. Furthermore, this method has a complex fabrication process, low processing efficiency, requires photolithography equipment, and has high manufacturing costs. Summary of the Invention

[0005] To overcome the problems existing in the related technologies, this disclosure provides a method for manufacturing a diaphragm, the diaphragm, a housing, and an electronic device.

[0006] According to a first aspect of this disclosure, a method for manufacturing a diaphragm is provided, the method comprising:

[0007] A microlens layer and an image accommodating layer are formed on both sides of a first transparent substrate using an imprinting process. The surface of the microlens layer includes multiple focusing lens units, and the surface of the image accommodating layer includes multiple grooves, the positions of which correspond one-to-one with the positions of the focusing lens units.

[0008] The groove is filled with an image filling structure, and the microlens layer, the first transparent substrate, the image accommodating layer and the image filling structure constitute a suspended imaging layer;

[0009] A coating layer is formed, which covers the microlens layer;

[0010] An ink layer is formed, which covers the coating layer.

[0011] In some embodiments of this disclosure, a graphic mold and a microlens mold are used to perform the embossing process; wherein, one of the graphic mold and the microlens mold is used as an upper mold, and the other is used as a lower mold, and the upper mold is flipped relative to the lower mold;

[0012] The surface of the lower mold is provided with a reflective layer, which is used to assist the alignment of the upper mold relative to the lower mold when they are closed.

[0013] In some embodiments of this disclosure, a microlens layer and a pattern accommodating layer are formed on both sides of a first transparent substrate using an imprinting process, including:

[0014] A transparent resin is coated on both sides of the first transparent substrate;

[0015] The first transparent substrate is placed between the upper mold and the lower mold, and the upper mold and the lower mold are controlled to close to compress the transparent resin;

[0016] The transparent resin is cured so that the transparent resin on both sides of the first transparent substrate forms the microlens layer and the graphic accommodating layer, respectively.

[0017] In some embodiments of this disclosure, a transparent resin is coated on both sides of the first transparent substrate, including:

[0018] The transparent resin is sprayed onto the surface of the lower mold;

[0019] The first transparent substrate is placed on the lower mold, and the transparent resin is sprayed onto the surface of the first transparent substrate away from the lower mold.

[0020] The first transparent substrate is rolled using rollers that move in a preset direction to coat both sides of the first transparent substrate with the transparent resin.

[0021] In some embodiments of this disclosure, when the transparent resin includes a photocurable resin, the direction of movement of the light source when curing the photocurable resin is the same as the preset direction when the roller moves.

[0022] In some embodiments of this disclosure, the method for manufacturing the diaphragm further includes:

[0023] The offset pattern layer is applied to one side of the second transparent substrate;

[0024] The offset printing pattern layer is bonded to the suspended imaging layer to form the film.

[0025] According to a second aspect of this disclosure, a diaphragm is provided, the diaphragm comprising:

[0026] A suspended imaging layer includes a microlens layer, a first transparent substrate, and an image accommodating layer stacked sequentially. The surface of the microlens layer is provided with multiple focusing lens units, and the image accommodating layer is provided with multiple grooves. The grooves accommodate image filling structures, and the positions of the image filling structures correspond one-to-one with the positions of the focusing lens units.

[0027] A coating layer that covers the microlens layer;

[0028] An ink layer that covers the coating layer.

[0029] In some embodiments of this disclosure, the focusing lens unit includes a spherical lens or an aspherical lens.

[0030] In some embodiments of this disclosure, the alignment deviation between the graphic filling structure and the focusing lens unit relative to the target alignment position is less than 15 μm; wherein, the target alignment position is the relative position of the graphic filling structure and the focusing lens unit when aligned.

[0031] In some embodiments of this disclosure, the area of ​​each focusing lens unit in the microlens layer is 0.014 mm. 2 -0.016mm 2 .

[0032] In some embodiments of this disclosure, the materials used to form the microlens layer and the graphic accommodating layer include a transparent resin.

[0033] In some embodiments of this disclosure, the material of the graphic filling structure includes one or more of pigment ink, fluorescent ink, and luminescent ink.

[0034] In some embodiments of this disclosure, the coating layer includes a metal reflective layer.

[0035] In some embodiments of this disclosure, the membrane further includes a second transparent substrate and an offset pattern layer stacked together, the offset pattern layer covering the suspended imaging layer.

[0036] According to a third aspect of this disclosure, a housing is provided, the housing including a light-transmitting body and a diaphragm provided in a second aspect of this disclosure, wherein an ink layer of the diaphragm is located away from the bonding surface between the diaphragm and the light-transmitting body.

[0037] According to a fourth aspect of this disclosure, an electronic device is provided, the electronic device comprising the housing provided in the third aspect of this disclosure.

[0038] The technical solutions provided by the embodiments of this disclosure can include the following beneficial effects: A microlens layer and an image accommodating layer are formed through an imprinting process, so that multiple focusing lens units in the microlens layer and multiple grooves in the image accommodating layer can correspond one-to-one, increasing the alignment accuracy of the focusing lens units and grooves, and improving the overall presentation effect of the suspended imaging layer in the film. At the same time, this manufacturing method is simple, efficient, and low-cost, which is beneficial for industrial production.

[0039] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0040] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0041] Figure 1 This is a flowchart illustrating a method for manufacturing a membrane according to an exemplary embodiment.

[0042] Figure 2 This is a schematic diagram illustrating the formation of a microlens layer and a pattern accommodating layer during the fabrication process of a film according to an exemplary embodiment.

[0043] Figure 3 It is shown according to an exemplary embodiment along Figure 2 A cross-sectional view along the AA direction.

[0044] Figure 4 This is a cross-sectional view illustrating the formation of a suspended imaging layer during the fabrication process of a membrane, according to an exemplary embodiment.

[0045] Figure 5 This is a cross-sectional view of a diaphragm shown according to an exemplary embodiment.

[0046] Figure 6 This is a schematic diagram of an upper mold and a lower mold according to an exemplary embodiment.

[0047] Figure 7 This is a cross-sectional view of a diaphragm shown according to another exemplary embodiment.

[0048] Figure 8 This is a cross-sectional view of a diaphragm shown according to another exemplary embodiment.

[0049] Figure 9 This is a schematic diagram of a microlens layer according to an exemplary embodiment.

[0050] Figure 10 This is a schematic diagram of the structure of the housing according to an exemplary embodiment.

[0051] Figure 11 This is a schematic diagram of the structure of the housing according to another exemplary embodiment. Detailed Implementation

[0052] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatuses and methods consistent with some aspects of the invention as detailed in the appended claims.

[0053] With the widespread use of electronic devices, in addition to providing basic communication and networking functions, electronic devices have gradually come to serve as decorative items. To ensure that the appearance of electronic devices meets users' needs, various patterns, textures, colors, or floating effects are usually set on the casing of the electronic devices.

[0054] To achieve the floating pattern effect on the casing, a microlens structure is typically incorporated inside the casing. This structure focuses external light, refracting it to create a pattern corresponding to the microlens' location, thus producing the floating effect. Currently, the process of forming microlenses involves sequentially exposing, developing, and etching a glass substrate coated with thermoplastic resin to form an array of multiple cylinders on the resin. The resin is then heated under specific conditions, causing partial melting and transforming the cylinders into microspheres, followed by cooling to obtain the microlens structure.

[0055] However, when forming microlens structures using the above method, the thermoplastic resin is difficult to shape, and the positions of the microlens structure and the pattern cannot correspond well, affecting the presentation of the levitation pattern effect. Furthermore, this method has a complex fabrication process, low processing efficiency, requires photolithography equipment, and has high manufacturing costs.

[0056] In view of this, the present disclosure provides a manufacturing method comprising: forming a microlens layer and an image accommodating layer on both sides of a first transparent substrate using an imprinting process; the surface of the microlens layer including multiple focusing lens units, and the surface of the image accommodating layer including multiple grooves, the positions of the grooves corresponding one-to-one with the positions of the focusing lens units; filling the grooves with an image filling structure; and the microlens layer, the first transparent substrate, the image accommodating layer, and the image filling structure constituting a suspended imaging layer; forming a coating layer covering the microlens layer; and forming an ink layer covering the coating layer. The microlens layer and the image accommodating layer are formed by the imprinting process to ensure the alignment accuracy between the focusing lens units in the microlens layer and the grooves in the image accommodating layer, thereby improving the overall rendering effect of the suspended imaging layer in the film. Furthermore, this manufacturing method is simple, efficient, and low-cost, making it suitable for industrial production.

[0057] An exemplary embodiment of this disclosure provides a method for manufacturing a diaphragm, with reference to... Figure 1 As shown, Figure 1 This is a flowchart illustrating a method for manufacturing a membrane according to an exemplary embodiment. The method for manufacturing a membrane includes the following steps:

[0058] Step S101: A microlens layer and an image accommodating layer are formed on both sides of the first transparent substrate using an imprinting process; wherein, the surface of the microlens layer includes multiple focusing lens units, and the surface of the image accommodating layer includes multiple grooves, the positions of the grooves corresponding one-to-one with the positions of the focusing lens units;

[0059] Step S102: Fill the groove with an image filling structure. The microlens layer, the first transparent substrate, the image accommodating layer and the image filling structure constitute a suspended imaging layer.

[0060] Step S103: Form a coating layer, which covers the microlens layer;

[0061] Step S104: Form an ink layer, which covers the coating layer.

[0062] In step S101, refer to Figure 2 and Figure 3 As shown, during the manufacturing process, an imprinting process is used to press both sides of the first transparent substrate 10, forming a microlens layer 20 including multiple focusing lens units 21 on one side of the first transparent substrate 10, and a graphic accommodating layer 30 including multiple grooves 31 on the other side of the first transparent substrate 10. During the imprinting process, a mold with a pattern or texture is used to simultaneously press both sides of the first transparent substrate 10. For example, since multiple focusing lens units 21 should be provided on the surface of the formed microlens layer 20, the focusing lens units 21 can include spherical lenses, aspherical lenses, cylindrical lenses, etc. Based on different types of focusing lens units 21, the mold corresponding to the microlens layer 20 should be provided with multiple patterns corresponding to the shape and position of the focusing lens units 21, so as to facilitate the imprinting process in forming multiple focusing lens units 21. The focusing lens units 21 are used to focus light. For example, Figure 2 and Figure 3 The focusing lens unit 21 shown is a spherical lens.

[0063] For example, since the surface of the formed graphic accommodating layer 30 should be provided with multiple grooves 31, the mold corresponding to the graphic accommodating layer 30 should be provided with multiple protrusions corresponding to the shape and position of the grooves 31, so that the positions corresponding to the protrusions form grooves 31 during the imprinting process. Exemplarily, the grooves 31 may include one or more of the following: rectangular, rhomboid, strip, circular, arc, sawtooth, wavy, etc., or the shape of the grooves 31 may be set to the shape of the desired pattern. This disclosure does not limit the shape of the grooves 31. In the formed microlens layer 20 and graphic accommodating layer 30, the position of the grooves 31 corresponds one-to-one with the position of the focusing lens unit 21. Since the grooves 31 are used to accommodate the graphic filling structure (which will be described in detail later), after the light is focused and reflected at the focusing lens unit 21 in the microlens layer 20, the pattern corresponding to the graphic filling structure exhibits the effect of floating on the surface of the film.

[0064] It should be noted that, since the formed film needs to achieve a levitation imaging effect, the first transparent substrate 10 is transparent. The material forming the first transparent substrate 10 can include plastic films with good light transmittance and mechanical strength, such as PET (Polyethylene terephthalate) and PC (Polycarbonate). Simultaneously, the materials forming the microlens layer 20 and the image accommodating layer 30 should be transparent to allow light to penetrate the image accommodating layer 30, the first transparent substrate 10, and the microlens layer 20, reaching the multiple focusing lens units 21 on the microlens layer 20 for focusing.

[0065] In step S102, combined Figure 3 and Figure 4 As shown, since the image accommodating layer 30 is transparent, the shape corresponding to the groove 31 cannot be displayed. By filling the groove 31 with an image filling structure 32, the microlens layer 20, the first transparent substrate 10, the image accommodating layer 30, and the image filling structure 32 together form a suspended imaging layer 101. The material forming the image filling structure 32 can be ink with a certain color, or fluorescent ink, luminescent ink, etc., so that when light is reflected from the focusing lens unit 21 in the microlens layer 20 to the image filling structure 32, the color and pattern in the image filling structure 32 are suspended and displayed on the surface of the film.

[0066] When forming the graphic filling structure 32, ink can be coated on the surface of the graphic receiving layer 30, so that the ink fills the groove 31, and other ink outside the groove 31 is removed with a scraper to avoid excess ink affecting the imaging of the suspended imaging layer 101. Further, the ink filling the groove 31 is cured so that the cured ink forms the graphic filling structure 32.

[0067] It is understandable that when forming the graphic filling structure 32, the grooves 31 on the graphic receiving layer 30 can be selectively filled based on the shape of the suspended pattern designed by the technician. For example, when the groove 31 is rectangular and multiple grooves 31 are arranged in an array on the graphic receiving layer 30, based on the desired pattern, such as the text "HAPPY", by selectively filling multiple grooves 31 on the graphic receiving layer 30, the graphic filling structure 32 in the filled grooves 31 combines to present the word "HAPPY", while other grooves 31 remain unfilled and blank. In this way, when the user views the film from one side of the microlens layer 20, the word "HAPPY" can appear to be suspended on the surface of the film.

[0068] In step S103, refer to Figure 5 As shown, a coating layer 40 is formed on the surface of the microlens layer 20 to cover the microlens layer 20. For example, the coating layer 40 can be formed by electroplating or coating with the same material. The coating layer 40 has the function of reflecting light, so that when a user looks at the graphic filling structure 32 from one side, the light is focused by the focusing lens unit 21 on the microlens layer 20 and reflected at the coating layer 40. The focused light then illuminates the graphic filling structure 32 corresponding to the focusing lens unit 21, thereby presenting a pattern effect that floats on the surface of the diaphragm 100.

[0069] The coating layer 40 may include a metal reflective layer and / or a dielectric reflective layer. The material of the metal reflective layer may include, but is not limited to, aluminum, gold, indium, silver, copper, etc., and the material of the dielectric reflective layer may include, but is not limited to, silicon monoxide, magnesium fluoride, silicon dioxide, aluminum oxide, etc.

[0070] In step S104, refer to Figure 5 As shown, an ink layer 50 is formed on the surface of the coating layer 40, such that the ink layer 50 covers the coating layer 40. The ink layer 50 is opaque to enhance the light reflection intensity of the coating layer 40 and to protect it. The ink layer 50 can be formed using a spraying or printing process. For example, the spraying or printing process can be repeated 3-5 times to ensure that the thickness of the formed ink layer 50 has good coverage and protective properties. The levitation imaging layer 101, the coating layer 40, and the ink layer 50 together form the film 100.

[0071] In existing technologies, focusing lens units 21 and grooves 31 are typically formed on both sides of the first transparent substrate 10 using photolithography. Since the materials of the first transparent substrate 10, the microlens layer 20, and the pattern accommodating layer 30 are all transparent, an opaque material layer needs to be coated on the surface of these materials to facilitate the exposure of the cylindrical patterns corresponding to the grooves 31 and the focusing lens units 21. Furthermore, alignment between the cylindrical patterns and the grooves 31 is crucial during exposure, making the process complex and difficult to control. After forming the cylindrical array on the microlens layer 20, the cylindrical patterns need to be shaped to transform into focusing lens units 21 of aspherical, spherical, or other shapes. However, shaping the cylindrical patterns requires complex process control, which can easily lead to positional misalignment between the shaped focusing lens units 21 and the grooves 31, or deviations from the intended shape of the shaped focusing lens units 21, resulting in poor imaging performance.

[0072] Using the method provided in this embodiment, since the microlens layer 20 and the pattern accommodating layer 30 are formed through an imprinting process, the multiple focusing lens units 21 on the microlens layer 20 and the multiple grooves 31 on the pattern accommodating layer 30 are simultaneously formed by a mold. The shape and arrangement of the required focusing lens units 21 and grooves 31 are set by the mold, resulting in high shape formation accuracy and high positional alignment precision. The light focused and reflected by the focusing lens units 21 can be better reflected to the pattern filling structure 32 filling the grooves 31, thereby improving the pattern presentation effect of the levitation imaging of the film 100 and enhancing the user experience. At the same time, the imprinting process has low operational complexity and does not require expensive equipment such as photolithography machines or complex operating processes, resulting in lower film manufacturing costs and facilitating industrial production.

[0073] In some possible implementations, combined Figure 2 and Figure 6 As shown, when forming a microlens layer 20 and an image accommodating layer 30 on both sides of the first transparent substrate 10 using an imprinting process, an image mold and a microlens mold are used for the imprinting process. The pattern on the image mold is used to form the groove 31 in the image accommodating layer 30, and the pattern on the microlens mold is used to form the focusing lens unit 21 on the microlens layer 20. The image mold and the microlens mold can be rotatably connected so that the image mold and the microlens mold can be relatively closed to perform the imprinting process.

[0074] One of the graphic mold and the microlens mold is designated as the upper mold 102, and the other as the lower mold 103. The lower mold 103 remains fixed. By controlling the rotation of the upper mold 102 relative to the lower mold 103, the graphic mold and the microlens mold can move relative to each other. Fixing one mold, rather than having both molds in motion, reduces the alignment difficulty during mold alignment and facilitates the alignment of the groove 31 in the graphic receiving layer 30 with the focusing lens unit 21 on the microlens layer 20. (Reference) Figure 6 , Figure 6 In the example, the graphic mold is used as the upper mold 102, and the microlens mold is used as the lower mold 103.

[0075] Since the lower mold 103 remains fixed, a reflective layer can be formed on its surface. This reflective layer is fixed to the surface of the lower mold 103, meaning it will not transfer to the film 100 during the closing and pressing of the lower mold 103 and the upper mold 102. When the upper mold 102 is controlled to rotate towards the lower mold 103 to close them, the lower mold 103 has a high reflectivity due to the good light reflectivity of the reflective layer, facilitating alignment between the upper mold 102 and the lower mold 103. For example, the material forming the reflective layer may include one or more of aluminum, gold, indium, silver, copper, silicon monoxide, magnesium fluoride, silicon dioxide, and aluminum oxide.

[0076] In an exemplary embodiment, step S101 of the method for manufacturing the film provided in the above embodiment involves forming a microlens layer and a pattern accommodating layer on both sides of the first transparent substrate using an imprinting process, including:

[0077] Step S201: Coat both sides of the first transparent substrate with a transparent resin;

[0078] Step S202: Place the first transparent substrate between the upper mold and the lower mold, and control the upper mold and the lower mold to close to compress the transparent resin;

[0079] Step S203: Curing the transparent resin so that the transparent resin on both sides of the first transparent substrate forms a microlens layer and a pattern accommodating layer, respectively.

[0080] In this embodiment, combined with Figure 2 and Figure 6As shown, since both the microlens layer 20 and the graphic accommodating layer 30 are transparent, transparent resin is used as the raw material for forming the microlens layer 20 and the graphic accommodating layer 30. The transparent resin can be a transparent photoinitiated curable resin or a thermosetting resin. The main resin of the transparent resin can include, but is not limited to, epoxy resin, vinyl ether, acrylate, etc. Before curing, the transparent resin is in a liquid or gel state. It is uniformly coated on both sides of the first transparent substrate 10, and then placed between the upper mold 102 and the lower mold 103. The upper mold 102 is controlled to rotate relative to the lower mold 103 so that the two are aligned and closed. The upper mold 102 and the lower mold 103 extrude the transparent resin on both sides of the first transparent substrate 10 so that the transparent resin on both sides of the first transparent substrate 10 forms the shapes of the microlens layer 20 and the graphic accommodating layer 30, respectively.

[0081] Since the transparent resin is in a liquid or gel state, it should be cured while the upper mold 102 and lower mold 103 are closed, so that the liquid or gel-like transparent resin is transformed into a solid state. The curing process can be carried out based on the type of transparent resin. For example, when the transparent resin is a thermosetting resin, the closed upper mold 102 and lower mold 103 are placed in a heating device and heated at a suitable temperature for a certain period of time to cure the transparent resin. The transparent resin adheres to both sides of the first transparent substrate 10 and forms a microlens layer 20 and a graphic accommodating layer 30, respectively.

[0082] For example, when the transparent resin is a photoinitiated curable resin, since the transparent resin needs to be exposed to a light source of a specific wavelength to cure, the upper mold 102 and / or the lower mold 103 should be made of a light-transmitting material. This allows the curing light source to irradiate the transparent mold during the curing process, causing the photoinitiator in the transparent resin to undergo a photochemical reaction. This allows the transparent resin to adhere to both sides of the first transparent substrate 10, forming a microlens layer 20 and a graphic accommodating layer 30, respectively. After curing the transparent resin, the upper mold 102 and the lower mold 103 are removed, and the focusing lens unit 21 on the microlens layer 20 and the groove 31 in the graphic accommodating layer 30 can still maintain their shapes.

[0083] In an exemplary embodiment, step S201 of the method for manufacturing the film provided in the above embodiment, which involves coating both sides of the first transparent substrate with a transparent resin, includes:

[0084] Step S301: Spray the transparent resin onto the surface of the lower mold;

[0085] Step S302: Place the first transparent substrate on the lower mold and spray a transparent resin onto the surface of the first transparent substrate away from the lower mold;

[0086] Step S303: Roller is used to press the transparent resin. The roller moves in a preset direction so that the two sides of the first transparent substrate are coated with transparent resin.

[0087] Combination Figure 2 and Figure 6 As shown, if transparent resin is first coated on both sides of the first transparent substrate 10, and then the first transparent substrate 10 coated with transparent resin is placed between the upper mold 102 and the lower mold 103, since the transparent resin is liquid or gel-like, it is easy for the transparent resin to accumulate or drip during the placement of the first transparent substrate 10. This results in uneven material distribution of the formed microlens layer 20 or pattern accommodating layer 30, affecting the positional correspondence between the focusing lens unit 21 and the groove 31, and affecting the focusing and reflection of light, resulting in poor imaging effect of the suspended pattern.

[0088] In this embodiment, the first transparent substrate 10 is placed between the upper mold 102 and the lower mold 103, and the transparent resin is disposed on both sides of the first transparent substrate 10. When disposing of the transparent resin, since the lower mold 103 remains fixed, a certain amount of transparent resin can be sprayed onto the surface of the lower mold 103 based on the pattern (graphic mold or microlens mold) corresponding to the lower mold 103 and the required thickness of the microlens layer 20 or graphic receiving layer 30 corresponding to the pattern. Then, the first transparent substrate 10 is placed on the lower mold 103 so that one side of the first transparent substrate 10 contacts the transparent resin.

[0089] After placing the first transparent substrate 10, a certain amount of transparent resin is sprayed onto the surface of the first transparent substrate 10 away from the lower mold 103, so that both sides of the first transparent substrate 10 are covered with transparent resin. Since the transparent resin distribution on both sides of the first transparent substrate 10 is uneven at this point, a roller can be used to roll the first transparent substrate 10 to ensure that the transparent resin is evenly coated on both sides of the first transparent substrate 10. For example, during the rolling process, the roller always moves along a preset direction, such as along... Figure 6 The roller can move from left to right along the Y direction, or from right to left along the Y direction, or from far to near along the X direction, or from near to far along the X direction. In other words, regardless of the direction in which the roller moves, the direction of movement remains consistent when the roller moves multiple times, in order to maintain the uniformity of the material distribution of the transparent resin and improve the stability of the microlens layer 20 and the graphic accommodating layer 30.

[0090] In some examples, when the transparent resin includes a photocurable resin, the curing process of the transparent resin requires irradiation and curing using a special light source. The direction of movement of the light source during the curing process is controlled to be the same as the preset direction of the roller movement. That is, if the roller moves from right to left along the Y direction to roll, when the light source irradiates the photocurable resin, the light source also moves from right to left along the Y direction to irradiate and cure the photocurable resin. This ensures that the force direction of the first transparent substrate 10 is the same as the curing direction of the transparent resin, improving the material stress uniformity of the film 100 and the mold, ensuring the structural stability of the microlens layer 20 and the graphic accommodating layer 30, so that the film 100 can present a stable floating pattern appearance.

[0091] In one exemplary embodiment, the method for manufacturing the diaphragm includes:

[0092] Step S401: A microlens layer and an image accommodating layer are formed on both sides of the first transparent substrate using an imprinting process; wherein, the surface of the microlens layer includes multiple focusing lens units, and the surface of the image accommodating layer includes multiple grooves, the positions of the grooves corresponding one-to-one with the positions of the focusing lens units;

[0093] Step S402: Fill the groove with an image filling structure. The microlens layer, the first transparent substrate, the image accommodating layer and the image filling structure constitute a suspended imaging layer.

[0094] Step S403: Form a coating layer, which covers the microlens layer;

[0095] Step S404: Form an ink layer, which covers the coating layer;

[0096] Step S405: Cover one side surface of the second transparent substrate with the offset pattern layer;

[0097] Step S406: Lay the offset pattern layer with the graphic receiving layer containing the graphic filling structure to form a film.

[0098] In this embodiment, the specific implementation of steps S401 to S404 is the same as or similar to the specific implementation of steps S101 to S104 in the above embodiment, and will not be described in detail here.

[0099] refer to Figure 5 and Figure 7As shown, if the film 100 only includes a levitation imaging layer 101, a coating layer 40, and an ink layer 50, since the levitation imaging layer 101 is entirely transparent except for the graphic filling structure 32, and only the graphic filling structure 32 has a certain color, the color effect presented by the film 100 is limited. Furthermore, the levitation pattern presented by focused light reflection is suspended above the transparent material, resulting in a low degree of realism in the levitation effect. Therefore, a material with a certain color or pattern can be attached to the surface of the levitation imaging layer 101 so that when the levitation pattern is presented, it is suspended above that color or pattern. In other words, that color or pattern provides a background color for the film 100, improving the presentation effect of the levitation pattern.

[0100] In this embodiment, a second transparent substrate 60 with an offset pattern layer 70 is attached to the surface of the levitation imaging layer 101. Since the offset pattern layer 70 includes a pattern formed by an offset printing process, the pattern has a certain color and shape. The offset pattern layer 70 and the levitation imaging layer 101 can be bonded together using transparent adhesive or OCA (Optically Clear Adhesive). The offset pattern layer 70 provides a background color for the film 100 to highlight the levitation pattern presented by the levitation imaging layer 101. The second transparent substrate 60 can be a transparent PC substrate or a PET substrate. The second transparent substrate 60 has a certain thickness and is positioned away from the levitation imaging layer 101 so that after the levitation imaging layer 101 presents a levitation image, the second transparent substrate 60 is located between the offset pattern layer 70 and the imaged levitation pattern, increasing the three-dimensional levitation effect of the levitation pattern and enhancing its realism.

[0101] In one exemplary embodiment, this disclosure provides a diaphragm 100, which can be formed using the diaphragm fabrication method provided in the above embodiments. (See reference...) Figure 3 and Figure 5 As shown, the film 100 includes a suspended imaging layer 101, a coating layer 40, and an ink layer 50. The suspended imaging layer 101 includes a microlens layer 20, a first transparent substrate 10, and an image accommodating layer 30 stacked sequentially. An image filling structure 32 is accommodated in the groove 31 of the image accommodating layer 30. The coating layer 40 covers the microlens layer 20, and the ink layer 50 covers the coating layer 40.

[0102] The first transparent substrate 10 is transparent, and its forming material may include PET, PC, etc. The microlens layer 20 and the graphic accommodating layer 30 are also transparent, so that light can pass through the graphic accommodating layer 30, the first transparent substrate 10, and the microlens layer 20 to reach the multiple focusing lens units 21 on the microlens layer 20 for focusing. The graphic accommodating layer 30 is provided with multiple grooves 31. Since the graphic accommodating layer 30 is transparent, the shape corresponding to the grooves 31 cannot be seen. A graphic filling structure 32 with a certain color is accommodated in the grooves 31 so that the shape of the grooves 31 can be seen, or the filling graphic filling structure 32 can present a certain pattern. The surface of the microlens layer 20 is also provided with multiple focusing lens units 21 that correspond one-to-one with the positions of the graphic filling structures 32. The focusing lens units 21 may include spherical lenses, aspherical lenses, cylindrical lenses, etc. The focusing lens units 21 are used to focus the light that passes through the microlens layer 20.

[0103] The coating layer 40 has the function of reflecting light. Since the coating layer 40 covers the microlens layer 20, it can reflect the light focused by the focusing lens unit 21. Because the focusing lens unit 21 corresponds one-to-one with the graphic filling structure 32, the light, after being focused and reflected, is projected onto the graphic filling structure 32, so that the colors and patterns in the graphic filling structure 32 are suspended and displayed on the surface of the film 100. The ink layer 50 can be an opaque ink of a certain thickness formed by spraying or printing to enhance the light reflection intensity of the coating layer 40 and protect the coating layer 40. Thus, when the user looks from one side of the graphic receiving layer 30, the light penetrates the suspended imaging layer 101, is focused by the focusing lens unit 21 on the microlens layer 20, and is reflected at the coating layer 40, so that the focused light illuminates the graphic filling structure 32 corresponding to the focusing lens unit 21. The user can perceive the imaging effect of the suspended pattern of the graphic filling structure 32 floating on the surface of the film 100.

[0104] Since the diaphragm provided in this embodiment is formed using the manufacturing method provided in the above-described embodiments of this disclosure, the shape of the focusing lens unit 21 and the groove 31 is highly formed, and the positional alignment accuracy of the two is relatively high. The light focused by the focusing lens unit 21 and reflected by the coating layer 40 can be better reflected to the graphic filling structure 32 filled in the groove 31, so as to improve the pattern presentation effect of the diaphragm 100 levitation imaging and improve the user's user experience.

[0105] In some examples, the coating layer 40 may include a metallic reflective layer and / or a dielectric reflective layer. The material of the metallic reflective layer may include, but is not limited to, aluminum, gold, indium, silver, copper, etc., and the material of the dielectric reflective layer may include, but is not limited to, silicon monoxide, magnesium fluoride, silicon dioxide, aluminum oxide, etc. When the coating layer 40 includes a metallic reflective layer, the reflective effect of the coating layer 40 is better due to the metallic luster, resulting in a better imaging effect of the levitation pattern. It should be noted that when the coating layer 40 includes a metallic reflective layer, and the film 100 is used in conjunction with a device containing electronic components, the thickness of the formed metallic reflective layer should be controlled to a small range to reduce or avoid magnetic interference caused by the metallic reflective layer to the electronic components of the device.

[0106] In some examples, since the diaphragm 100 needs to achieve a levitation imaging effect, and the microlens layer 20 and the image accommodating layer 30 are formed using an imprinting process, the materials used to form the microlens layer 20 and the image accommodating layer 30 include a transparent resin. This allows light to penetrate the image accommodating layer 30, the first transparent substrate 10, and the microlens layer 20 for focusing, and also facilitates the fabrication of the diaphragm 100. Based on the curing process of the transparent resin, the transparent resin can be a transparent photoinitiated curable resin or a thermosetting resin. The transparent resin can include a main resin and additives. The main resin can include, but is not limited to, epoxy resin, vinyl ether, acrylate, etc.

[0107] In some examples, reference Figure 5 As shown, the focusing lens unit 21 is a spherical lens, meaning that the surface of the focusing lens unit 21 is a facet of a sphere, and every point on the surface of the focusing lens unit 21 has a common center. In other examples, refer to... Figure 8 As shown, the focusing lens unit 21 is an aspherical lens, meaning that the surface of the focusing lens unit 21 is not spherically curved, and multiple points on the surface of the focusing lens unit 21 do not share a common center. Compared to cylindrical lenses, spherical and aspherical lenses can focus light rays from multiple different incident directions effectively, and the diaphragm 100 can produce better images of suspended patterns.

[0108] In some examples, reference Figure 3 and Figure 8As shown, during the fabrication of the diaphragm 100, unavoidable errors may occur during the formation of the groove 31 and the focusing lens unit 21, preventing the image filling structure 32 and the focusing lens unit 21 from being perfectly aligned. Through experimentation, the alignment deviation between the groove 31 and the focusing lens unit 21 relative to the target alignment position when they are perfectly aligned was controlled to be less than 15 μm. That is, the maximum allowable offset between the image filling structure 32 and the focusing lens unit 21 relative to the target alignment position should be less than 15 μm. This ensures that the light focused and reflected by the focusing lens unit 21 can illuminate the image filling structure 32, ensuring a good imaging effect for the suspended image.

[0109] In some examples, combined Figure 8 and Figure 9 As shown, since the diaphragm 100 provided in this disclosure is formed by the diaphragm manufacturing method provided in the above embodiments, the alignment error between the pattern filling structure 32 and the focusing lens unit 21 in the fabricated diaphragm 100 is small, and more focusing lens units 21 can be formed on the microlens layer 20 in the relatively small area of ​​the diaphragm 100. In the microlens layer 20, the area occupied by each focusing lens unit 21 can be 0.014 mm. 2 -0.016mm 2 This allows for the placement of a greater number of focusing lens units 21 with good alignment accuracy on a diaphragm 100 of the same size. Through testing, the diaphragm 100 provided in this embodiment can achieve a focusing lens range of 7000mm. 2 The diaphragm 100 forms more than 450,000 focusing lens units 21 on its surface area, and the alignment deviation between the focusing lens units 21 and the image filling structure 32 is less than 15 μm. The suspended image presented by the diaphragm 100 has a realistic and clear imaging effect.

[0110] In some examples, reference Figure 8As shown, the materials forming the graphic filling structure 32 include one or more of pigment ink, fluorescent ink, and luminescent ink. Pigment ink is ink with a preset color, so that the suspended pattern formed after light is focused onto the graphic filling structure 32 has the preset color. Fluorescent ink is ink made with fluorescent pigments. When the graphic filling structure 32 formed with fluorescent ink is focused onto light, it can absorb energy from the light and excite photons, releasing the absorbed energy in the form of low-visible light, thereby producing fluorescence and giving the suspended pattern a bright color. Luminescent ink can be ink doped with phosphorescent self-luminescent materials, and the types of phosphorescent self-luminescent materials can include sulfide series, aluminate series, and silicate series. Under the condition of light irradiation, the suspended pattern imaged by the diaphragm 100 in the graphic filling structure 32 formed with luminescent ink can display the color of the phosphorescent self-luminescent material or the ink itself. Meanwhile, the photoluminescent self-luminescent material can absorb and store laser light energy from sunlight, lamplight, ultraviolet light, stray light, etc. After the light excitation stops, such as at night when there is no light, the photoluminescent self-luminescent material in the graphic filling structure 32 releases the stored energy in the form of light, so that the diaphragm 100 can still present a floating pattern in the dark environment, increasing the fun of the imaging of the diaphragm 100 and meeting the user's needs.

[0111] In one example, reference Figure 7 As shown, the film 100 also includes a second transparent substrate 60 and an offset pattern layer 70 stacked together, with the offset pattern layer 70 covering the suspended imaging layer 101. Since the suspended imaging layer 101 is entirely transparent except for the graphic filling structure 32, and only the graphic filling structure 32 has a certain color, the color effect presented by the film 100 is limited. The suspended pattern presented by focused light reflection is suspended above the transparent material, resulting in a low degree of realism in the suspension effect. Because the offset pattern layer 70 includes a pattern formed through an offset printing process, and this pattern has a certain color and shape, the offset pattern layer 70 covers the suspended imaging layer 101 to provide a background color for the film 100, thus highlighting the suspended pattern presented by the suspended imaging layer 101. The second transparent substrate 60 can be a transparent PC substrate or a PET substrate with a certain thickness. The second transparent substrate 60 is disposed between the offset pattern layer 70 and the imaged suspended pattern, increasing the three-dimensional suspension effect of the suspended pattern and enhancing its realism.

[0112] In one exemplary embodiment, reference Figure 10 and Figure 11As shown, this disclosure provides a housing 200, which can serve as the casing for electronic devices such as mobile phones, tablets, and watches. The housing 200 includes a light-transmitting body 201 and a diaphragm 100. The diaphragm 100 can be the diaphragm 100 provided in the above embodiments of this disclosure, or it can be a diaphragm 100 manufactured using the manufacturing method provided in the above embodiments. Because the focusing lens unit 21 and the graphic filling structure 32 in the diaphragm 100 have good alignment accuracy, the diaphragm 100 can present a good floating pattern imaging effect, thereby enabling the housing 200 to also present a good floating pattern imaging effect, improving the user experience.

[0113] The light-transmitting body 201 is the main structure constituting the housing 200. The light-transmitting body 201 can be formed of materials such as glass, plastic, or transparent fiberglass composite materials to make the light-transmitting body 201 transparent. In order for the housing 200 to present a floating pattern, the ink layer 50 of the diaphragm 100 is positioned away from the bonding surface between the diaphragm 100 and the light-transmitting body 201 to prevent light from being blocked by the ink layer 50 after passing through the light-transmitting body 201, thus preventing the imaging of the floating pattern from being achieved.

[0114] In one exemplary embodiment, this disclosure also provides an electronic device, which may be a mobile phone, tablet computer, fitness tracker, watch, or similar device. The electronic device includes the housing provided in the above embodiments of this disclosure. The housing can serve as the back cover of the electronic device and is in close contact with the battery. When the housing is combined with the electronic device, the ink layer in the housing is close to the battery of the electronic device. The light-transmitting body of the housing serves as the external surface that the user touches, allowing light to penetrate the light-transmitting body of the housing during use, thereby providing the user with an imaging effect of a suspended pattern through the suspended imaging layer in the housing. Due to the good alignment accuracy of the focusing lens unit and the graphic filling structure in the housing, the imaged suspended pattern is realistic, clear, and complete, resulting in a good user experience.

[0115] Other embodiments of the invention will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of the invention are indicated by the following claims.

[0116] It should be understood that the present invention is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of the invention is limited only by the appended claims.

Claims

1. A method for manufacturing a diaphragm, characterized in that, The method for manufacturing the diaphragm includes: A microlens layer and an image accommodating layer are formed on both sides of a first transparent substrate using an imprinting process. The surface of the microlens layer includes multiple focusing lens units, and the surface of the image accommodating layer includes multiple grooves, the positions of which correspond one-to-one with the positions of the focusing lens units. The groove is filled with an image filling structure, and the microlens layer, the first transparent substrate, the image accommodating layer and the image filling structure constitute a suspended imaging layer; A coating layer is formed, which covers the microlens layer; An ink layer is formed, which covers the coating layer; The step of filling the groove with graphic filling structure includes: Based on the desired pattern, the plurality of grooves on the graphic accommodating layer are selectively filled, such that the graphic filling structure combination in the plurality of filled grooves presents the desired pattern, while the other grooves are left unfilled and in a blank state.

2. The method for manufacturing the diaphragm according to claim 1, characterized in that, The embossing process is performed using a graphic mold and a microlens mold; wherein, one of the graphic mold and the microlens mold is used as the upper mold, and the other is used as the lower mold, and the upper mold is flipped relative to the lower mold; The surface of the lower mold is provided with a reflective layer, which is used to assist the alignment of the upper mold relative to the lower mold when they are closed.

3. The method for manufacturing the diaphragm according to claim 2, characterized in that, A microlens layer and an image accommodating layer are formed on both sides of a first transparent substrate using an imprinting process, including: A transparent resin is coated on both sides of the first transparent substrate; The first transparent substrate is placed between the upper mold and the lower mold, and the upper mold and the lower mold are controlled to close to compress the transparent resin; The transparent resin is cured so that the transparent resin on both sides of the first transparent substrate forms the microlens layer and the graphic accommodating layer, respectively.

4. The method for manufacturing the diaphragm according to claim 3, characterized in that, A microlens layer and an image accommodating layer are formed on both sides of a first transparent substrate using an imprinting process, including: The transparent resin is sprayed onto the surface of the lower mold; The first transparent substrate is placed on the lower mold, and the transparent resin is sprayed onto the surface of the first transparent substrate away from the lower mold. The first transparent substrate is rolled using rollers, which move in a preset direction to coat both sides of the first transparent substrate with the transparent resin. The upper and lower molds are controlled to close to compress the transparent resin. The transparent resin is cured so that the transparent resin on both sides of the first transparent substrate forms the microlens layer and the graphic accommodating layer, respectively.

5. The method for manufacturing the diaphragm according to claim 4, characterized in that, When the transparent resin includes a photocurable resin, the direction of movement of the light source when curing the photocurable resin is the same as the preset direction when the roller moves.

6. The method for manufacturing a membrane according to any one of claims 1-5, characterized in that, The method for manufacturing the diaphragm further includes: The offset pattern layer is applied to one side of the second transparent substrate; The offset printing pattern layer is bonded to the suspended imaging layer to form the film.

7. A diaphragm, characterized in that, The membrane includes: A suspended imaging layer includes a microlens layer, a first transparent substrate, and an image accommodating layer stacked sequentially. The surface of the microlens layer is provided with multiple focusing lens units. The image accommodating layer has multiple grooves, each groove accommodating an image filling structure. The positions of the image filling structures correspond one-to-one with the positions of the focusing lens units. The multiple grooves on the image accommodating layer accommodate the image filling structures based on a desired pattern. The image filling structures in the multiple grooves accommodating the image filling structures combine to form the desired pattern, while the other grooves remain blank. A coating layer that covers the microlens layer; An ink layer that covers the coating layer.

8. The diaphragm according to claim 7, characterized in that, The focusing lens unit includes a spherical lens or an aspherical lens.

9. The diaphragm according to claim 7, characterized in that, The alignment deviation between the graphic filling structure and the focusing lens unit relative to the target alignment position is less than 15 μm; wherein, the target alignment position is the relative position of the graphic filling structure and the focusing lens unit when they are aligned.

10. The diaphragm according to claim 9, characterized in that, In the microlens layer, the area of ​​each focusing lens unit is 0.014 mm. 2 -0.016mm 2 .

11. The diaphragm according to claim 7, characterized in that, The microlens layer and the graphic accommodating layer are formed of a transparent resin.

12. The diaphragm according to claim 7, characterized in that, The material used for the graphic filling structure includes one or more of pigment ink, fluorescent ink, and luminescent ink.

13. The diaphragm according to claim 7, characterized in that, The coating layer includes a metal reflective layer.

14. The diaphragm according to any one of claims 7 to 13, characterized in that, The membrane also includes a second transparent substrate and an offset pattern layer stacked together, the offset pattern layer covering the suspended imaging layer.

15. A housing, characterized in that, The housing includes a light-transmitting body and a membrane as described in any one of claims 7 to 14, wherein the ink layer of the membrane is located away from the bonding surface between the membrane and the light-transmitting body.

16. An electronic device, characterized in that, The electronic device includes the housing as described in claim 15.

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