A light shielding element, a camera module and an electronic device
By designing a meandering microstructure staircase on the surface of the light-shielding element, the problem of poor imaging quality caused by reflected light from the optical light-shielding element was solved, achieving better stray light elimination and improved imaging quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NANCHANG O FILM OPTICAL ELECTRONICS TECH CO LTD
- Filing Date
- 2025-05-29
- Publication Date
- 2026-06-12
AI Technical Summary
Existing optical light-blocking elements reflect light within the lens, resulting in poor image quality.
A light-shielding element is designed by setting microstructures on the surface of the light-shielding body. The microstructures include at least two levels of stepped structures. The stepped structures rise from the inside to the outside along the radial direction of the light-shielding element, and the outline is meandering to increase the difference in reflection angle to scatter light. The complementary design of different microstructures is combined to cover stray light across the entire wavelength range.
It effectively eliminates stray light, reduces reflected light interference, improves image quality, and enhances the imaging quality of electronic devices.
Smart Images
Figure CN224354690U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of optical imaging technology, and in particular relates to a light-shielding element, a camera module, and an electronic device. Background Technology
[0002] With the rapid development of technology and the improvement of living standards, portable electronic products such as mobile phones and tablets have developed rapidly. This has led to increasingly higher demands on imaging components used in electronic products. A lens generally consists of a lens barrel, a lens element, and an optical sash. The function of the optical sash element is to regulate the light flux in the optical system. When external light enters the lens, the optical sash element between the lens elements can block unwanted light from entering. However, when light shines on the inner diameter plane of the sash, it will reflect the beam to the lens and then back to the upper surface of the sash, resulting in poor image quality. Utility Model Content
[0003] The purpose of this invention is to provide a light-shielding element, a camera module, and an electronic device to solve the problem of stray light transmission affecting image quality.
[0004] To achieve the objectives of this utility model, the following technical solution is provided:
[0005] Firstly, this application provides a light-shielding element, comprising: a light-shielding body having a light-transmitting hole in its center, the light-shielding body including a first surface and a second surface, the first surface and the second surface being disposed opposite to each other along the axial direction of the light-shielding element; and a microstructure disposed on at least one of the first surface and the second surface, the microstructure being disposed around the periphery of the light-transmitting hole, the microstructure including at least two stepped structures, the at least two stepped structures rising from the inside to the outside along the radial direction of the light-shielding element, the outline of each stepped structure extending in a meandering manner along the circumferential direction of the light-shielding element. Thus, on the one hand, light incident on the at least two stepped structures at different positions results in different reflection angles, improving the light dispersion effect and enabling the light-shielding element to eliminate stray light; on the other hand, the meandering outline of the microstructure achieves better stray light reduction, improving image quality; and the meandering outline of each stepped structure provides sufficient structural strength, making it less prone to deformation during transportation and assembly, thus improving the light-shielding effect of the light-shielding element.
[0006] In one possible implementation, each step structure includes multiple sub-steps arranged sequentially along the circumferential direction of the light-shielding element, with a groove formed between adjacent sub-steps. When light is incident, the reflected light is irregularly scattered to reduce its energy, thereby reducing interference from the reflected light on the camera module, improving ghosting, and enhancing the imaging quality of the electronic device.
[0007] In one possible implementation, the sub-steps of the same-level stepped structure have the same shape and are uniformly arranged in a ring along the circumference of the light-shielding element. The outline of each sub-step comprises multiple outline segments, with at least two of these segments intersecting in their extension directions. These multiple outline segments include at least one of straight lines and curved lines. When the outline of the sub-step is composed of straight lines, the outline of the stepped structure is serrated, which facilitates diffuse reflection of incident light and prevents reflections, stray light, and glare at the light-transmitting aperture from affecting the imaging quality of the electronic device. When the outline of the sub-step is composed of curved lines, the outline of the stepped structure is wavy, which effectively disrupts the reflection path of stray light, thereby reducing stray light and improving the imaging quality of the electronic device.
[0008] In one possible implementation, the dimensions of the sub-steps in adjacent stepped structures increase proportionally from the inside out along the radial direction of the light-shielding element. This facilitates matching the light intensity attenuation curve, and the outer stepped structure can intercept stray light with high incident angles, effectively improving the imaging quality of electronic devices.
[0009] In one possible implementation, the microstructure is configured as two microstructures, namely a first microstructure and a second microstructure. The first microstructure is disposed on the first surface, and the second microstructure is disposed on the second surface. Both the first and second microstructures rise from the inside out along the radial direction of the light-shielding element, forming an uneven surface on the wall of the light-transmitting hole. This increases the reflective area, allowing the reflected light to be irregularly scattered after light is incident, thereby reducing the energy of the reflected light and reducing the interference of reflected light on the camera module, improving ghosting phenomena, and enhancing the imaging quality of the electronic device.
[0010] In one possible implementation, the outline of the first microstructure is configured in a fish-scale or serrated shape; and / or, the outline of the second microstructure is configured in a fish-scale or serrated shape; and / or, along the radial direction of the light-shielding element, the width of the second microstructure is greater than the width of the first microstructure; and / or, along the axial direction of the light-shielding element, the thickness of the second microstructure is greater than the thickness of the first microstructure. The second microstructure protrudes relative to the first microstructure towards the side closer to the light-transmitting aperture. The first microstructure contains at least two stepped structures, the outline of which is fish-scale shaped, which is beneficial for dispersing short-wavelength stray light; the second microstructure contains at least two stepped structures, the outline of which is serrated, which is beneficial for cutting off the reflection path of long-wavelength stray light. Thus, the optical responses of the first and second microstructures complement each other, covering stray light across the entire wavelength range.
[0011] In one possible implementation, along the radial direction of the light-shielding element, the dimension of the sub-step body in the radial direction of the light-shielding element is a first dimension, and the dimension of the light-shielding body in the radial direction of the light-shielding element is a second dimension, with the ratio of the first dimension to the second dimension ranging from 0.1 to 0.2. By controlling the ratio of the first dimension to the second dimension within a reasonable range, structural rigidity can be maintained while ensuring sufficient light-shielding area.
[0012] In one possible implementation, the number of stepped structures in each microstructure is 2 to 12; and / or, the height of each stepped structure along the axial direction of the light-shielding element is 2 μm to 4 μm. The multi-level stepped structure forms a gradient refractive index layer, reducing stray light reflection and improving the imaging quality of the electronic device. By controlling the height of each stepped structure along the axial direction of the light-shielding element within a reasonable range, structural rigidity can be maintained while ensuring sufficient light-shielding area.
[0013] Secondly, this application provides a camera module, including a lens barrel, a lens, and a light-shielding element as described above, wherein the lens and the light-shielding element are both disposed inside the lens barrel, and the light-shielding element abuts against the lens.
[0014] Thirdly, this application provides an electronic device including the camera module as described above. Attached Figure Description
[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0016] Figure 1 This is a schematic diagram of the structure of the electronic device provided in the embodiments of this application;
[0017] Figure 2 This is a cross-sectional view of the camera module provided in the embodiments of this application;
[0018] Figure 3 This is a schematic diagram of the structure of the light-shielding element provided in the first embodiment of this application;
[0019] Figure 4 yes Figure 3 A top view of the light-shielding element in the image;
[0020] Figure 5 yes Figure 4 An enlarged view of region A of the light-shielding element in the image;
[0021] Figure 6 This is a schematic diagram of the structure of the light-shielding element provided in the second embodiment of this application;
[0022] Figure 7 yes Figure 6 An enlarged view of region B of the light-shielding element;
[0023] Figure 8 A schematic diagram of the structure of the light-shielding element provided in the third embodiment of this application;
[0024] Figure 9 yes Figure 8 Cross-sectional view of the light-shielding element in the middle
[0025] Figure 10 yes Figure 9 An enlarged view of region C of the light-shielding element.
[0026] Key reference numerals: Electronic device 1000; Camera module 100; Housing 200; Display screen 300; Light-shielding element 1; Lens 2; Lens barrel 3; Light-shielding body 10; Microstructure 20; First microstructure 30; Second microstructure 40; Light-transmitting hole 110; First surface 120; Second surface 130; Stepped structure 210; Contour line 220; Sub-stepped body 230; Groove 231; Groove sidewall 2311; Groove bottom wall 2312; Contour line 232; Stepped structure 310; Contour line 320; Stepped structure 410; Contour line 420; Radial direction - X; Axial direction - Y; Circumferential direction - Z. Detailed Implementation
[0027] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0028] It is understood that the terminology in the specification, claims, and accompanying drawings of this application is for describing specific embodiments only and is not intended to limit this application. The terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish different objects, not to describe a specific order. Unless the context clearly states otherwise, the singular forms "a" and "described" are also intended to include the plural forms. The term "comprising," and any variations thereof, are intended to cover non-exclusive inclusion. Furthermore, this application can be implemented in many different forms and is not limited to the embodiments described herein. The purpose of providing the following specific embodiments is to facilitate a clearer and more thorough understanding of the disclosure of this application, wherein words indicating orientation such as up, down, left, and right refer only to the position of the illustrated structure in the corresponding drawings. In the description of this application, it should be noted that unless otherwise explicitly specified and limited, the terms "installed," "connected," "linked," and "set on" should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral connection; it can refer to a mechanical connection; it can refer to a direct connection or an indirect connection through an intermediate medium; it can refer to the internal communication between two elements. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0029] The following description provides preferred embodiments for carrying out this application; however, this description is for the purpose of illustrating the general principles of this application and is not intended to limit the scope of this application. The scope of protection of this application shall be determined by the appended claims.
[0030] Please see Figure 1 , Figure 1 This is a schematic diagram of the structure of the electronic device 1000 provided in this application embodiment. The electronic device 1000 may include, but is not limited to, devices with a camera module 100 such as mobile phones, tablets, digital cameras, multimedia players, e-book readers, laptops, in-vehicle devices, or wearable devices. It is understood that, in order to enable those skilled in the art to better understand the electronic device 1000, this application uses a mobile phone as an example for detailed description. It should be noted that the use of a mobile phone as the electronic device 1000 is for illustrative purposes only, and this application does not impose specific limitations. For example, the product type of the electronic device 1000 can also be set according to actual needs.
[0031] In this embodiment, for example, the electronic device 1000 includes a camera module 100, a housing 200, and a display screen 300. The display screen 300 is mounted on the front of the housing 200, and the camera module 100 is mounted inside the housing 200 and protrudes from the display screen 300. Specifically, the housing 200 and the display screen 300 are sealed and fixedly connected to encapsulate the camera module 100. The camera module 100 is housed within the accommodating space formed by the housing 200 and the display screen 300. The lens of the camera module 100 protrudes from the display screen 300 and serves as a front-facing camera. The camera module 100 can be disposed inside the electronic device 1000 and function as a camera. The camera module 100 is used to enable the electronic device 1000 to take photos or record videos. The camera module 100 has good image quality, thereby ensuring the photo-taking performance of the electronic device 1000. Of course, in other embodiments, the camera module 100 is installed inside the housing 200 and exposed on the back of the housing 200, that is, the camera module 100 is positioned with its back to the display screen 300 and serves as a rear camera.
[0032] Please see Figure 2 , Figure 2 This is a cross-sectional view of the camera module 100 provided in this embodiment. The camera module 100 includes a light-shielding element 1, a lens 2, and a lens barrel 3. Both the light-shielding element 1 and the lens 2 are disposed within the lens barrel 3, and the light-shielding element 1 abuts against the lens 2. The light-shielding element 3 is used to disperse strong light and block stray light, so that the camera module 100 has good image quality.
[0033] In one possible implementation, there are multiple lenses 2, which are stacked along the axial direction Y of the camera module 100 and spaced apart within the lens barrel 2. A light-shielding element 1 is disposed between two adjacent lenses 2.
[0034] It should be noted that, Figure 2 The purpose is merely to schematically describe the arrangement of the light-shielding element 1, lens 2 and lens barrel 3, and not to make specific limitations on the connection position, connection relationship and specific structure of each element. Figure 2 The structure of the camera module 100 illustrated in this embodiment is merely a schematic diagram and does not constitute a specific limitation on the camera module 100. In other embodiments of this application, the camera module 100 may include components that are more... Figure 2 The components shown may include more or fewer parts, or combinations of certain parts, or different parts, such as camera module 20, which may also include, but are not limited to, fillers, limiters, etc.
[0035] In one possible implementation, the light-shielding element 1 can be configured as a metal light-shielding structure. On the one hand, the surface of a metal light-shielding structure is not easily scratched or abraded, has high strength, is not easily deformed, and will not deform due to excessive assembly pressure during assembly; on the other hand, since the metal light-shielding structure itself has a certain weight, it will not shift position due to static electricity. Of course, in another possible implementation, the light-shielding element 1 can also be configured as a plastic light-shielding structure. On the one hand, this reduces production costs; on the other hand, because the plastic light-shielding structure has a certain degree of flexibility, it avoids the problem of breakage of the light-shielding element 1 during processing, reducing the processing difficulty of the light-shielding element 1.
[0036] Please see Figure 3 , Figure 3 This is a schematic diagram of the structure of the light-shielding element 1 provided in the first embodiment of this application. In this embodiment, the light-shielding element 1 includes a light-shielding body 10 and a microstructure 20. A light-transmitting hole 110 is provided in the middle of the light-shielding body 10 for transmitting light. The light-shielding body 10 also includes a first surface 120 and a second surface 130, which are arranged opposite to each other along the axial direction Y of the light-shielding element 1.
[0037] In this embodiment, the light-transmitting hole 110 is a circular hole, and the first surface 120 and the second surface 130 are arranged parallel to each other and have the same shape, which is annular. It is understood that the light-transmitting hole 110 can be roughly circular or other shapes, such as racetrack-shaped, elliptical, square, etc., and this embodiment does not limit it. The shapes of the first surface 120 and the second surface 130 can also be other shapes and can be different, and can also be non-parallel, depending on the specific application scenario, and this embodiment does not limit them.
[0038] In this embodiment, the first surface 120 faces the image side and the second surface 130 faces the object side. It is understood that the first surface 120 may also face the object side and the second surface 130 may face the image side; this embodiment is not limited thereto.
[0039] Microstructure 20 is disposed on at least one of the first surface 120 and the second surface 130, and is disposed around the periphery of the light-transmitting hole 110. In this embodiment, the microstructure 20 is engraved on the light-shielding body 10 using a laser femtosecond laser device. The microstructure 20 includes at least two levels of stepped structures 210, which rise from the inside to the outside along the radial direction X of the light-shielding element 1. The outline 220 of each stepped structure 210 extends in a meandering manner along the circumferential direction Z of the light-shielding element 1. Figure 3As shown, the stepped structure 210 extends along the radial direction X of the light-shielding element 1, gradually increasing in height. The height of each stepped structure 210 gradually increases along the axial direction Y, forming a terraced structure. This facilitates the light-shielding element 1 in segmenting stray light at different angles in the radial direction X, with each level handling light at a specific incident angle, ensuring that stray light at different depths is blocked. The meandering extension refers to the outline 220 of the stepped structure 210 having a curved or broken shape, such as a wavy or sawtooth path. This increases the number of light scattering and reflections, causing the stray light to attenuate after multiple refractions or reflections through a complex path. It should be noted that at least two stepped structures 210 can be integrally engraved on the same light-shielding body 10, or they can be separate structures; this application embodiment does not limit this. The microstructure 20 can also be formed by punching or injection molding; this application embodiment does not limit this either.
[0040] Thus, on the one hand, the light incident on at least two different levels of the stepped structure 210 has different reflection angles, which improves the light dispersion effect and enables the light-shielding element 1 to eliminate stray light; on the other hand, the meandering contour line 220 of the microstructure 20 can achieve a better stray light improvement effect and improve the image quality; and the meandering contour line 220 of each stepped structure 210 can provide sufficient structural strength, so that it is not easy to be deformed during transportation and assembly, thus improving the light-shielding effect of the light-shielding element 1.
[0041] In one possible implementation, a light-shielding layer is provided on the first surface 120, the second surface 130, and the wall of the light-transmitting hole 110 of the light-shielding body 10. The light-shielding layer can be a black light-shielding layer, which facilitates the elimination of stray light and prevents stray light from affecting the imaging quality of the camera module 100.
[0042] Understandably, in some other embodiments, the light-shielding body 10 can be made directly from black light-absorbing material (i.e., black material) or from light-transmitting material (i.e., white material), and then a black light-shielding layer is coated on the surface of the light-transmitting material. This application does not impose any specific limitations on this.
[0043] Please refer to the following: Figure 4 and Figure 5 , Figure 4 yes Figure 3 Top view of the light-shielding element 1 Figure 5 yes Figure 4An enlarged view of region A of the light-shielding element 1. In this embodiment, each stepped structure 210 includes multiple sub-steps 230, which are arranged sequentially along the circumferential direction Z of the light-transmitting hole 110, with a groove 231 formed between adjacent sub-steps 230. Specifically, the multiple grooves 231 are connected along the circumferential direction Z of the light-transmitting hole 110. When light is incident, the reflected light can be irregularly scattered to reduce the energy of the reflected light, thereby reducing the interference of the reflected light on the camera module 100, improving the ghosting phenomenon, and enhancing the imaging quality of the electronic device 1000.
[0044] In this embodiment, the multiple sub-steps 230 in the same-level stepped structure 210 have the same shape and are uniformly arranged in a ring along the circumference of the light-shielding element 1. The outline 232 of the sub-step 230 includes multiple outline segments, at least two of which intersect in their extending directions. These multiple outline segments include at least one of straight lines and curved lines. For example... Figure 6 and Figure 7 As shown, Figure 6 This is a schematic diagram of the structure of the light-shielding element 1 provided in the second embodiment of this application. Figure 7 yes Figure 6 An enlarged view of region B of the light-shielding element 1 shows that the outline 232 of the sub-step 230 is composed of multiple straight line segments, and the outline 220 of the step structure 210 is serrated. This facilitates diffuse reflection of incident light, preventing reflections, stray light, and glare from the light-shielding element 1 at the light-transmitting aperture 110, which would affect the imaging quality of the electronic device 1000. For example... Figure 4 and Figure 5 As shown, the outline 232 of the sub-step body 230 is composed of multiple arc segments, and the outline 220 of the step structure 210 is wavy. This effectively disrupts the reflection path of stray light, thereby reducing stray light and improving the imaging quality of the electronic device 1000.
[0045] It is understood that the shape of the outline 232 of the sub-step body 230 described above is merely an example, and it can also be composed of both straight line segments and curved line segments. This application embodiment does not limit this. The shapes of multiple sub-step bodies 230 in the same level of step structure 210 can also be different, and this application embodiment does not limit this.
[0046] Please refer to the following: Figure 5 and Figure 7In this embodiment, the dimensions of the sub-steps 230 of adjacent stepped structures 210 increase proportionally from the inside out along the radial direction X of the light-shielding element 1. Specifically, the outline 220 of adjacent stepped structures 210 increases proportionally along the center of the light-transmitting hole 110, and the maximum depth of the plurality of grooves 231 gradually increases along the radial direction X of the light-shielding element 1. This facilitates matching the light intensity attenuation curve, and the outer stepped structure 210 can intercept stray light with high incident angles, effectively improving the imaging quality of the electronic device 1000.
[0047] In one possible implementation, the maximum depth of the plurality of grooves 231 along the radial direction X of the light-shielding element 1 may gradually decrease or remain constant. The sub-step body 230 is configured as a conical structure. Specifically, in the projection plane perpendicular to the axial direction Y of the light-shielding element 1, the length of the sub-step body 230 along the circumferential direction Z of the light-shielding element 1 gradually increases from the inside to the outside.
[0048] It should be noted that the sub-steps 230 of adjacent two-level stepped structures 210 can be aligned or staggered. For example... Figure 7 As shown, the sub-steps 230 of two adjacent stepped structures 210 are aligned. For example... Figure 5 As shown, the sub-steps 230 of two adjacent stepped structures 210 are staggered, and the outline 220 of the stepped structure 210 is fish-scale shaped.
[0049] In one possible implementation, the dimensions of the sub-steps 230 of two adjacent stepped structures 210 are non-proportionally increased from the inside to the outside along the radial direction X of the light-shielding element 1. This application embodiment does not limit this.
[0050] Please see Figure 8 , Figure 8 The schematic diagram of the light-shielding element 1 provided in the third embodiment of this application shows that there are two microstructures 20, namely a first microstructure 30 and a second microstructure 40. The first microstructure 30 is disposed on the first surface 120 and around the periphery of the light-transmitting hole 110, and the second microstructure 40 is disposed on the second surface 130 and around the periphery of the light-transmitting hole 110. The structure of the first microstructure 30 may be the same as or different from the structure of the second microstructure 40. For example, the outline 310 of the first microstructure 30 may be configured as fish scales or serrated; and / or, the outline of the second microstructure may be configured as fish scales or serrated.
[0051] Specifically, the first microstructure 30 and the second microstructure 40 both rise from the inside to the outside along the radial direction X of the light-shielding element 1, forming an uneven surface on the hole wall of the light-transmitting hole 110. This increases the reflective area, allowing the reflected light to be scattered irregularly after light is incident, thereby reducing the energy of the reflected light and reducing the interference of the reflected light on the camera module 100, improving the ghosting phenomenon and enhancing the imaging quality of the electronic device 1000.
[0052] Please refer to the following: Figure 8 and Figure 9 , Figure 9 yes Figure 8 A cross-sectional view of the light-shielding element 1. In this embodiment, the different structures of the first microstructure 30 and the second microstructure 40 are used as an example for explanation. The first microstructure 30 contains at least two levels of stepped structures 310, and the outlines 320 of the at least two levels of stepped structures 310 are fish-scale shaped, which is beneficial for dispersing short-wavelength stray light; the second microstructure 40 contains at least two levels of stepped structures 410, and the outlines 420 of the at least two levels of stepped structures 410 are sawtooth shaped, which is beneficial for cutting off the reflection path of long-wavelength stray light. Thus, the optical responses of the first microstructure 30 and the second microstructure 40 complement each other, covering stray light across the entire wavelength range.
[0053] Please see Figure 9 Along the radial direction X of the light-shielding element 1, the maximum width D4 of the second microstructure is equal to the width D3 of the first microstructure 40. Specifically, along the radial direction X of the light-shielding element 1, the second microstructure 40 protrudes relative to the first microstructure 30 towards the side closer to the light-transmitting aperture 110. Misalignment may occur in the assembly of the light-shielding element 1 and the lens 2, causing stray light to enter from different angles. The protruding second microstructure 40 can better intercept light that may be deflected downwards, while the first microstructure 30 can handle upward stray light. This multi-layered design improves fault tolerance.
[0054] Please refer to the following: Figure 9 and Figure 10 , Figure 10 yes Figure 9 An enlarged view of region C of the light-shielding element 1. In this embodiment, along the axial direction Y of the light-shielding element 1, the thickness D6 of the second microstructure 40 is greater than the thickness D5 of the first microstructure 30. It should be noted that since the object side and image side of the light-shielding element 1 can be interchanged, the relationship between the first microstructure 30 and the second microstructure 40 is only relative; here, it is understood that the thickness D5 of the first microstructure 30 is different from the thickness D6 of the second microstructure 40. The difference between the thickness D5 of the first microstructure 30 and the thickness D6 of the second microstructure 40 is beneficial for light to undergo different refractions, scattering, or reflections when passing through different structures, thereby optimizing the overall stray light suppression effect.
[0055] Please refer to the following: Figure 4 and Figure 5In this embodiment, along the radial direction X of the light-shielding element 1, the sub-step 230 has a first dimension D1 in the radial direction X of the light-shielding element 1, and the light-shielding body 10 has a second dimension D2 in the radial direction X of the light-shielding element 1. The ratio of the first dimension D1 to the second dimension D2 ranges from 0.1 to 0.2. For example, the first dimension D1 is 1 μm, and the second dimension D2 is 10 μm. This ensures sufficient light-shielding area while maintaining structural rigidity.
[0056] Please refer to the following: Figure 9 and Figure 10 In this embodiment of the application, the number of stepped structures 210 in each microstructure 20 is 2 to 12 levels. For example, the number of stepped structures 210 in each microstructure 20 is 2, 4, 6, 8, 10, or 12 levels, etc. Figure 9 As shown, the first microstructure 30 contains a 12-level stepped structure 310; the second microstructure contains a 6-level stepped structure 410. Thus, the multi-level stepped structure 210 forms a gradient refractive index layer, which weakens the reflection of stray light and improves the imaging quality of the electronic device 1000.
[0057] Please see Figure 10 In this embodiment, the height of each stepped structure 210 along the axial direction Y of the light-shielding element 1 is 2µm-4µm. For example, the height of each stepped structure 210 along the axial direction Y of the light-shielding element 1 can be, but is not limited to, 2µm, 3µm, or 4µm. The height of each stepped structure 210 along the axial direction Y of the light-shielding element 1 can be understood as the length of the groove 231 along the radial direction Y. In this embodiment, as... Figure 10 As shown, the groove 231 is a right-angled groove, meaning that the sidewall 2311 of the groove 231 is perpendicular to the bottom wall 1312 of the groove 231. In some embodiments, the groove 231 can also be an obtuse-angled or acute-angled groove, meaning that the angle between the sidewall 2311 and the bottom wall 1312 of the groove 231 is an obtuse-angled or acute-angled angle. By controlling the height of each stepped structure 210 along the axial direction Y of the light-shielding element 1 within a reasonable range, it is possible to maintain structural rigidity while ensuring sufficient light-shielding area.
[0058] It should be noted that the height of each step structure 210 along the axial direction Y of the light-shielding element 1 can be the same or different; the height of the light-shielding body 10 along the axial direction Y of the light-shielding element 1 should be greater than or equal to 10um.
[0059] The above-disclosed embodiments are merely some preferred embodiments of the present utility model, and should not be construed as limiting the scope of the present utility model. Those skilled in the art can understand that implementing all or part of the above-described embodiments and making equivalent changes in accordance with the claims of the present utility model still fall within the scope of the present utility model.
Claims
1. A light-shielding element, characterized in that, include: A light-shielding body, wherein a light-transmitting hole is provided in the middle of the light-shielding body, and the light-shielding body includes a first surface and a second surface, wherein the first surface and the second surface are arranged opposite to each other along the axial direction of the light-shielding element; A microstructure is disposed on at least one of the first surface and the second surface, and the microstructure is disposed around the periphery of the light-transmitting hole. The microstructure includes at least two stepped structures, the at least two stepped structures rising from the inside to the outside along the radial direction of the light-shielding element, and the outline of each stepped structure extending in a meandering manner along the circumferential direction of the light-shielding element.
2. The light-shielding element according to claim 1, characterized in that, Each step structure includes multiple sub-steps, which are arranged sequentially along the circumferential direction of the light-shielding element, with a groove formed between two adjacent sub-steps.
3. The light-shielding element according to claim 2, characterized in that, The sub-steps of the same level of stepped structure have the same shape and are uniformly arranged in a ring along the circumference of the light-shielding element. The outline of the sub-step includes multiple outline segments, at least two of which intersect in their extension directions. The multiple outline segments include at least one of straight lines and arcs.
4. The light-shielding element according to claim 2, characterized in that, The dimensions of the sub-steps of the adjacent two levels of the stepped structure increase proportionally from the inside to the outside along the radial direction of the light-shielding element.
5. The light-shielding element according to claim 1, characterized in that, The microstructure is configured as two microstructures, namely a first microstructure and a second microstructure. The first microstructure is disposed on the first surface, and the second microstructure is disposed on the second surface.
6. The light-shielding element according to claim 5, characterized in that, The outline of the first microstructure is configured as fish scales or serrated; and / or, The outline of the second microstructure is configured as fish scales or serrated; and / or, Along the radial direction of the light-shielding element, the width of the second microstructure is greater than the width of the first microstructure; and / or, Along the axial direction of the light-shielding element, the thickness of the second microstructure is greater than the thickness of the first microstructure.
7. The light-shielding element according to claim 2, characterized in that, Along the radial direction of the light-shielding element, the dimension of the sub-step body in the radial direction of the light-shielding element is a first dimension, and the dimension of the light-shielding body in the radial direction of the light-shielding element is a second dimension. The ratio of the first dimension to the second dimension is in the range of 0.1-0.
2.
8. The light-shielding element according to any one of claims 1-7, characterized in that, The number of stepped structures in each microstructure is 2 to 12; and / or, The height of each stepped structure along the axial direction of the light-shielding element is 2µm-4µm.
9. A camera module, characterized in that, It includes a lens barrel, a lens, and a light-shielding element as described in any one of claims 1-8, wherein the lens and the light-shielding element are both disposed within the lens barrel, and the light-shielding element abuts against the lens.
10. An electronic device, characterized in that, Includes the camera module as described in claim 9.