An optical folding assembly, camera module and electronic device

Abstract

The application provides a light folding assembly, a camera module and an electronic device. The light folding assembly comprises a light folding element and a first ink layer on the surface of the light folding element. The side of the first ink layer away from the light folding element has a plurality of convex structures, and the adjacent two convex structures have a concave space. When a bundle of stray light is incident on the outer surface of the convex structure, the convex structure can reflect the bundle of stray light in multiple different directions, thereby achieving the effect of scattering, and then weakening the intensity of the reflected light along a certain direction on the surface of the light folding element, and accordingly weakening the intensity of the reflected light entering other optical elements on the image side of the light folding element, reducing the interference of stray light, and improving the imaging quality.

Description

Technical Field

[0001] This application relates to the field of electronic device technology, and more particularly to a light folding component, a camera module, and an electronic device. Background Technology

[0002] Optical folding components are core components in compact optical systems. By reflecting or refracting light, optical folding components change the direction of light propagation, thereby utilizing the lateral space within the device to obtain a longer effective optical path or a more complex optical structure without increasing the thickness of the device, so as to achieve higher performance within a limited space.

[0003] Typically, non-effective areas of optical folding components are fitted with an extinction layer, which suppresses stray light and improves image contrast. However, the extinction layer cannot effectively eliminate stray light. For stray light at certain specific angles, when the stray light is incident on the surface of the extinction layer, it still has strong reflection energy, affecting image quality. Utility Model Content

[0004] This application provides a light folding component, a camera module, and an electronic device for reducing the reflection energy of the matting layer surface and improving image quality.

[0005] In a first aspect, this application provides an optical folding assembly. Specifically, the optical folding assembly includes an optical folding element and an matting layer located on the surface of the optical folding element. The optical folding element can be made of glass or plastic. The matting layer is a functional coating used to suppress stray light, reduce surface reflection, and improve the signal-to-noise ratio of the optical system. Optionally, the matting layer may include at least one of an ink layer and an anti-reflective coating layer.

[0006] The matting layer has multiple protrusions on the side facing away from the light-folding element, with recesses between adjacent protrusions. From a surface structure perspective, the side of the matting layer facing away from the light-folding element is not flat, but rather uneven. In terms of thickness, the matting layer is non-uniform. The thickness is greater where the protrusions are located, and less where the recesses are located.

[0007] When stray light strikes the outer surface of a raised structure, the structure reflects it in multiple directions, achieving a scattering effect. This weakens the intensity of reflected light propagating along a certain direction on the surface of the extinction layer, and consequently weakens the intensity of reflected light entering other optical elements on the image side of the optical folding assembly, reducing stray light interference and improving image quality. Furthermore, some stray light can undergo multiple reflections between different raised structures, lengthening its propagation path on the surface of the extinction layer. This causes the stray light to be absorbed by the light-absorbing material contained in the extinction layer, attenuating its energy. This further weakens the intensity of light incident on other optical elements on the image side of the optical folding assembly, reducing the impact of stray light on imaging.

[0008] When specifically setting the matting layer, the matting layer may include one structural layer or multiple structural layers. In one optional technical solution, the matting layer includes a first ink layer, and the raised structure is located on the side of the first ink layer opposite to the optical folding element. Optionally, the entire raised structure may be located within the first ink layer. In this case, the maximum height of the raised structure is less than the thickness of the first ink layer. Alternatively, other structural layers may be provided on the surface of the first ink layer, with a portion of the raised structure located within the first ink layer and another portion located within other structural layers.

[0009] In another alternative technical solution, in addition to the first ink layer, the matte layer also includes a second ink layer and an antireflective coating layer. The first ink layer, the antireflective coating layer, and the second ink layer are stacked sequentially in a direction away from the optical folding element. The end of the protrusion structure away from the optical folding element is located in the second ink layer, and the end of the protrusion structure close to the optical folding element is located in the first ink layer. The maximum height of the protrusion structure is greater than or equal to the sum of the thickness of the second ink layer and the thickness of the antireflective coating layer. Along the thickness direction of the matte layer, the recessed space between two adjacent protrusion structures penetrates the second ink layer and the antireflective coating layer.

[0010] When specifically designing the protruding structure, it can take various structural forms. In one optional technical solution, the protruding structure is a strip structure. The protruding structure can extend along a straight line, or along a broken line or curve.

[0011] In one optional technical solution, the matting layer includes a first protrusion structure and a second protrusion structure among a plurality of protrusion structures. Both the first protrusion structure and the second protrusion structure are strip structures, and the extension direction of the first protrusion structure intersects with the extension direction of the second protrusion structure.

[0012] In one optional technical solution, the matting layer includes a plurality of third protrusion structures among the plurality of protrusion structures, all of which are strip structures, and the plurality of third protrusion structures are arranged sequentially along a first direction.

[0013] In one optional technical solution, the protruding structure is a strip-shaped structure, and the protruding structure has a first sidewall and a second sidewall, which are located on opposite sides of the protruding structure's extension direction. The first and second sidewalls can be directly connected to form a V-shaped wall surface. Correspondingly, the cross-section of the protruding structure is triangular. Alternatively, the first and second sidewalls can be directly connected to form an arc-shaped wall surface. Correspondingly, the cross-section of the protruding structure can be a standard semicircle or semi-ellipse, or smaller than a semicircle, smaller than a semi-ellipse, larger than a semicircle, or larger than a semi-ellipse. Alternatively, in addition to the first and second sidewalls, the protruding structure may also include a top wall, with the first sidewall, top wall, and second sidewall connected sequentially. The cross-section of the protruding structure can be rectangular, trapezoidal, or irregular.

[0014] Besides strip structures, protrusions can also be conical, cylindrical, or spherical. These protrusions can be arranged randomly or in a matrix in a two-dimensional plane.

[0015] The spacing and size of the protrusions are closely related to the light scattering effect of the extinction layer. In one optional technical solution, along the arrangement direction of the protrusions, the maximum spacing W1 between two adjacent protrusions satisfies: W1 ≤ 100 μm. By constraining the value of W1 within 100 μm, the protrusions can be arranged more densely, thereby increasing the probability of light incident on the surface of the protrusions and allowing the light to be reflected in multiple different directions, thus improving the light scattering effect.

[0016] In another alternative technical solution, along the arrangement direction of the raised structures, the maximum width W2 of the raised structures satisfies: W2 ≤ 100 μm. By constraining the value of W2 within 100 μm, the phenomenon that the number of raised structures is limited due to the large width of the raised structures can be alleviated, further improving the light scattering effect of the matting layer.

[0017] In practice, the values ​​of W1 and W2 can both be within their respective ranges. Alternatively, only one of them can be within its respective range.

[0018] In one optional technical solution, along the arrangement direction of the protruding structures, the maximum spacing W1 between two adjacent protruding structures and the maximum width W2 of the protruding structure satisfy: 0.4 ≤ W1 / W2 ≤ 1.5. Optionally, the ratio of W1 / W2 can be 0.5, 0.7, 0.9, 1.1, 1.3, or other values ​​satisfying the above range, which are not listed in this application.

[0019] In one optional technical solution, the maximum height H of the protruding structure along the thickness direction of the matte layer and the maximum spacing W1 between two adjacent protruding structures satisfy: 0.3 ≤ H / W1 ≤ 1. Optionally, the ratio of H / W1 can be 0.4, 0.5, 0.6, 0.7, 0.8, 0.9 or other values ​​within the above range, which are not listed in this application.

[0020] When a first ink layer is applied to the surface of an optical folding element, the first ink layer can be applied to different surfaces of the optical folding element. In one optional technical solution, the optical folding element has a first surface and a second surface, the plane containing the first surface and the plane containing the second surface intersect, and a chamfered surface is provided between the first surface and the second surface. The matte layer can at least cover a portion of the first surface. Alternatively, the first ink layer can at least cover a portion of the second surface. Or, the first ink layer can at least cover a portion of the chamfered surface. In specific implementations, the first ink layer can cover at least one of the chamfered surface, the first surface, and the second surface.

[0021] The first surface can be either the incident surface or the exit surface. Alternatively, the first surface can be any surface other than the incident or exit surface. Similarly, the second surface can be either the incident surface, the exit surface, or any surface other than the incident or exit surface.

[0022] In one alternative technical solution, the light folding element is a prism or a reflector.

[0023] Secondly, this application also provides a camera module. The camera module includes an image sensor and the light folding assembly described in any of the first aspects above, with the image sensor located on the image side of the light folding assembly. In the light folding assembly, the light-absorbing layer on the surface of the light folding element has a raised structure. When stray light is incident on the outer surface of the raised structure, the raised structure can reflect this stray light in multiple different directions, thereby achieving a scattering effect. This weakens the intensity of the reflected light along a certain direction on the surface of the light-absorbing layer, and correspondingly weakens the intensity of the reflected light entering the image sensor located on the image side of the light folding assembly, reducing stray light interference and improving image quality.

[0024] Thirdly, this application also provides an electronic device. The electronic device includes a housing and the camera module described in the second aspect, the camera module being located within the housing.

[0025] During the photographing process, ambient light passes through the light-folding element assembly and is projected onto the surface of the image sensor. As the light propagates, the raised structure on the surface of the light-diffusing layer reflects stray light in multiple directions, achieving a scattering effect. This weakens the intensity of reflected light along a certain direction on the surface of the light-diffusing layer, and correspondingly weakens the intensity of reflected light entering the image sensor located on the image side of the light-folding assembly, reducing stray light interference and improving image quality. Attached Figure Description

[0026] Figure 1 A schematic diagram of the structure of an electronic device provided in an embodiment of this application;

[0027] Figure 2 This is a schematic diagram of the structure of the camera module provided in some embodiments of this application;

[0028] Figure 3 Enlarged partial views of the light folding component provided in some embodiments of this application;

[0029] Figure 4 for Figure 3 The light folding assembly shown is an AA cross-sectional view in some embodiments;

[0030] Figure 5 for Figure 3 The light folding assembly shown is an AA cross-sectional view in some other embodiments;

[0031] Figure 6 This is a schematic diagram of the structure of the matting layer provided in some embodiments of this application;

[0032] Figure 7 Schematic diagrams of the structure of the matting layer provided in the embodiments of this application in other embodiments;

[0033] Figure 8 Schematic diagrams of the structure of the matting layer provided in the embodiments of this application in other embodiments;

[0034] Figure 9 Schematic diagrams of the structure of the matting layer provided in the embodiments of this application in other embodiments;

[0035] Figure 10 Schematic diagrams of the structure of the matting layer provided in the embodiments of this application in other embodiments;

[0036] Figure 11 Schematic diagrams of the structure of the matting layer provided in the embodiments of this application in other embodiments;

[0037] Figure 12 A schematic diagram showing the arrangement of the protrusion structure provided in some embodiments of this application;

[0038] Figure 13 A schematic diagram showing the arrangement of the protrusion structure provided in the embodiments of this application in other embodiments;

[0039] Figure 14 A schematic diagram showing the arrangement of the protrusion structure provided in the embodiments of this application in other embodiments;

[0040] Figure 15 A schematic diagram showing the arrangement of the protrusion structure provided in the embodiments of this application in other embodiments;

[0041] Figure 16 Cross-sectional views of the matte layer in some embodiments provided for the present application, along the arrangement direction parallel to the protrusion structure;

[0042] Figure 17 Cross-sectional views of the matting layer in some other embodiments provided for the present application, along the arrangement direction parallel to the protrusion structure;

[0043] Figure 18 This is a schematic diagram of the structure of the light folding component provided in some embodiments of this application;

[0044] Figure 19 Schematic diagrams of the structure of the light folding component provided in the embodiments of this application in other embodiments;

[0045] Figure 20 Schematic diagrams of the structure of the light folding component provided in the embodiments of this application in other embodiments;

[0046] Figure 21 The diagram shows the fabrication of the protrusion structure in the optical folding assembly provided in this application in some embodiments.

[0047] Figure label:

[0048] 01-Housing; 011-Light-transmitting hole; 02-Camera module;

[0049] 03-Image processor; 1-Light folding assembly; 2-Image sensor;

[0050] 3-Lens; 3a-First lens; 3b-Second lens;

[0051] 4-Carrier plate; 5-Fixing component; 6-Laser component;

[0052] 10 - Optical folding element; 101 - First surface; 102 - Second surface;

[0053] 103 - Chamfered surface; 20 - Matte finish; 201 - Raised structure;

[0054] 2011 - First sidewall; 2012 - Second sidewall; 2013 - Connecting wall;

[0055] 201a - First protrusion structure; 201b - Second protrusion structure; 201c - Third protrusion structure;

[0056] 202 - First ink layer; 203 - Second ink layer; 204 - Antireflective coating layer;

[0057] C - Recessed space. Detailed Implementation

[0058] To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings. However, the exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein. The same reference numerals in the figures denote the same or similar structures, and therefore repeated descriptions of them will be omitted. The terms expressing position and direction described in the embodiments of this application are illustrative based on the accompanying drawings, but changes can be made as needed, and all such changes are included within the scope of protection of this application. The accompanying drawings of the embodiments of this application are for illustrating relative positional relationships only and do not represent actual scale.

[0059] It should be noted that specific details are set forth in the following description to facilitate understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0060] To facilitate understanding of the technical solution provided in this application, the application scenarios of this application are first introduced below. This application relates to an optical folding component, which is a device in an optical system used to change the direction of light propagation. The optical folding component can "fold" the light path through reflection or refraction to compress the system volume or achieve special optical functions. The optical folding component can be applied in camera modules, where light from the external environment changes its propagation direction after passing through the optical folding component and finally reaches the photosensitive element.

[0061] The camera module can be applied to electronic devices with shooting capabilities, such as mobile phones, tablet personal computers, laptop computers, personal computers, personal digital assistant computers (PDAs), cameras, in-vehicle devices, or wearable devices. Optionally, wearable devices include, but are not limited to, augmented reality (AR) glasses, AR headsets, virtual reality (VR) glasses, or VR headsets. Of course, the electronic device can also be other devices with shooting capabilities, which are not listed here.

[0062] Figure 1 A schematic diagram of the structure of an electronic device provided in an embodiment of this application, such as... Figure 1 As shown, the electronic device includes a housing 01 and a camera module 02, with the camera module 02 located inside the housing 01. In electronic devices such as mobile phones and tablets, the camera module 02 can be a front-facing camera module or a rear-facing camera module. The camera module 02 is used to collect ambient light and convert the image information carried by the ambient light into electrical signals.

[0063] In order for camera module 02 to capture ambient light, such as Figure 1 As shown, in some embodiments, the housing 01 has a light-transmitting hole 011, the shape of which is not limited to circular, elliptical, rectangular, or triangular. The light-transmitting hole 011 allows light from the external environment to enter the interior of the electronic device and shine onto the camera module 02. In electronic devices such as mobile phones and tablets, the light-transmitting hole 011 may be located on the back cover of the housing 01.

[0064] In other embodiments, the electronic device also includes a display screen, a portion of which is a light-transmitting area, through which ambient light can enter the interior of the electronic device and be directed toward the camera module 02.

[0065] Of course, there are other ways to enable the camera module 02 to collect ambient light, which will not be listed in this application.

[0066] Please continue to refer to this. Figure 1The aforementioned electronic device also includes an image processor 03, which is communicatively connected to the camera module 02. The image processor 03 can acquire and process image data from the camera module 02. The communication connection between the image processor 03 and the camera module 02 can include data transmission via electrical connections such as signal lines, or via coupling connections. It is understood that the image processor 03 and the camera module 02 can also achieve a communication connection through other methods capable of data transmission.

[0067] It should be noted that, Figure 1 The images only schematically illustrate some of the components contained in the electronic device; the actual shape, size, location, and construction of these components are not subject to change. Figure 1 The limitation.

[0068] Figure 2 The structural schematic diagrams of the camera module provided in the embodiments of this application in some embodiments are as follows: Figure 2 As shown, the camera module 02 includes a light folding component 1 and an image sensor 2. The image sensor 2 is located on the image side of the light folding component 1. Ambient light is incident from the object side of the light folding component 1, and after being reflected or refracted by the light folding component 1, it is emitted from the image side of the light folding component 1 and finally projected onto the surface of the image sensor 2. The image sensor 2 can convert the image information carried by the ambient light into an electrical signal.

[0069] In addition to the image sensor 2 and the light folding assembly 1, the camera module 02 may also include a lens 3. The lens 3 can be located on the object side or the image side of the light folding assembly 1. This application does not limit the number or position of the lenses 3; they can be configured according to actual needs. Figure 2 For example, in some embodiments, the camera module 02 includes a plurality of lenses 3, and the plurality of lenses 3 includes a first lens 3a and a second lens 3b, wherein the first lens 3a is located on the object side of the light folding assembly 1, and the second lens 3b is located on the image side of the light folding assembly 1. Specifically, the second lens 3b may be located between the light folding assembly 1 and the image sensor 2.

[0070] Please continue to refer to this. Figure 2The arrows in the diagram illustrate the propagation path of ambient light from the outside to the image sensor 2. Specifically, the ambient light first enters the surface of the light folding assembly 1 through the first lens 3a. After reflection or refraction by the light folding assembly 1, the propagation direction of the ambient light changes. After passing through the second lens 3b, the ambient light is finally projected onto the surface of the image sensor 2. It can be seen that the light folding assembly 1 can "fold" the light path through reflection or refraction. In the camera module 02, the effective focal length of the camera module 02 can be extended by utilizing the above-mentioned characteristics of the light folding assembly 1, while maintaining a compact design.

[0071] Figure 3 The structural schematic diagrams of the light folding component provided in the embodiments of this application in some embodiments are as follows: Figure 3 As shown, the light folding assembly 1 includes a light folding element 10 and an extinction layer 20 located on the surface of the light folding element 10. This application does not limit the type of the light folding element 10; optionally, the light folding element 10 can be a prism or a mirror. Taking a prism as an example, the light folding element 10 can be a triangular prism, a pentaprism, or a Duff prism. Figure 3 An example of a prism is given using the light folding element 10. This application does not limit the material of the light folding element 10; optionally, the material of the light folding element 10 can be glass or plastic.

[0072] The matting layer 20 is a functional coating used to suppress stray light, reduce surface reflection, and improve the signal-to-noise ratio of optical systems. In terms of materials, the matting layer 20 may include at least one of an ink layer and an anti-reflection coating layer. Both the ink layer and the anti-reflection coating layer can reduce light reflection on the surface of the matting layer 20. Specifically, the ink layer reduces reflection by absorbing incident light, while the anti-reflection coating layer reduces reflection through interference effects or a gradient refractive index structure. Optionally, the ink layer may include at least one of carbon black, nano-carbon, iron oxide or copper oxide, or a black dye. The anti-reflection coating layer may include at least one of fluorides, oxides, or nitrides. The ink layer can be prepared using screen printing or pad printing processes, and the anti-reflection coating layer can be prepared using physical vapor deposition or chemical vapor deposition processes.

[0073] From the perspective of surface structure, the side of the matting layer 20 that faces away from the light folding element 10 is not a flat surface, but an uneven surface. Figure 4 for Figure 3 The light folding assembly shown is an AA cross-sectional view in some embodiments, such as... Figure 4As shown, the matting layer 20 has multiple protrusions 201 on the side opposite to the light folding element 10, and a recessed space C is formed between two adjacent protrusions 201. The thickness of the matting layer 20 is uneven. The matting layer 20 is thicker at the locations corresponding to the protrusions 201, and thinner at the locations corresponding to the recessed spaces C.

[0074] For a single protrusion structure 201, the protrusion structure 201 can have a regular shape or an irregular shape. The outer surface of the protrusion structure 201 can include a plane or a curved surface. For multiple protrusion structures 201, the multiple protrusion structures 201 can be arranged periodically or randomly.

[0075] When a stray light is incident on the outer surface of the protrusion structure 201, the protrusion structure 201 can reflect the stray light in multiple different directions, thereby achieving a scattering effect. This weakens the intensity of the reflected light propagating along a certain direction on the surface of the extinction layer 20, and also weakens the intensity of the reflected light entering other optical elements located on the image side of the light folding assembly 1, reducing stray light interference and improving imaging quality.

[0076] In addition, some stray light can be reflected multiple times between different protrusions 201, thereby extending the propagation path of stray light on the surface of the extinction layer 20. This causes the stray light to be absorbed by the light-absorbing material contained in the extinction layer 20, which attenuates the energy of the stray light and correspondingly reduces the intensity of light incident on other optical elements on the image side of the light folding assembly 1, thereby reducing the impact of stray light on imaging.

[0077] When specifically setting the matte layer 20, such as Figure 4 As shown, in some embodiments, the matting layer 20 includes a first ink layer 202, which is located in the light-shielding area of ​​the light folding element 10, or in other words, in the non-optical area of ​​the light folding element 10. The aforementioned "light-shielding area" and "non-optical area" can be understood as areas in the light folding element 10 that do not participate in light propagation, reflection, or imaging. The matting layer 20 may include only the first ink layer 202, or it may include other structural layers in addition to the first ink layer 202.

[0078] The raised structure 201 is located on the side of the first ink layer 202 facing away from the light folding element 10. Optionally, the entire raised structure 201 can be located on the first ink layer 202. In this case, the maximum height of the raised structure 201 is less than the thickness of the first ink layer 202. In terms of composition, the raised structure 201 is entirely composed of ink material. Alternatively, in addition to the first ink layer 202, the matte layer 20 may include other structural layers, which may be located on the side of the first ink layer 202 facing away from the light folding element 10. A portion of the raised structure 201 is located on the first ink layer 202, and another portion of the raised structure 201 is located on other structural layers. It can also be understood that a portion of the raised structure 201 is composed of the material in the first ink layer 202, and another portion is composed of the material in other structural layers. Or, the entire raised structure 201 is located on the surface of the first ink layer 202, and the raised structure 201 is composed of the material of other structural layers.

[0079] Figure 5 for Figure 3 The light folding assembly shown is an AA cross-sectional view in some other embodiments, such as... Figure 5 As shown, the matting layer 20 may further include a second ink layer 203 and an antireflective coating layer 204, with the first ink layer 202, the antireflective coating layer 204, and the second ink layer 203 stacked sequentially in a direction away from the light folding element 10. The end of the protruding structure 201 away from the light folding element 10 is located in the second ink layer 203, and the end of the protruding structure 201 close to the light folding element 10 is located in the first ink layer 202. The maximum height of the protruding structure 201 is greater than or equal to the sum of the thickness of the second ink layer 203 and the thickness of the antireflective coating layer 204. Along the thickness direction of the matting layer 20, the recessed space C between two adjacent protruding structures 201 penetrates the antireflective coating layer 204 and the second ink layer 203.

[0080] In terms of composition, the raised structure 201 includes a portion of the material of the second ink layer 203 and a portion of the material of the antireflective coating layer 204. Specifically, the second ink layer 203 includes a plurality of spaced-apart first sub-parts, and the antireflective coating layer 204 includes a plurality of spaced-apart second sub-parts. Both the first and second sub-parts are components of the raised structure 201. Within the same raised structure 201, the orthographic projections of the first sub-parts and the second sub-parts on the surface of the first ink layer 202 at least partially overlap. The aforementioned raised structure 201 disrupts the continuity between the second ink layer 203 and the antireflective coating layer 204, causing the second ink layer 203 to form a plurality of spaced-apart first sub-parts, and also causing the antireflective coating layer 204 to form a plurality of spaced-apart second sub-parts.

[0081] In the above embodiments, the side of the matte layer 20 with the raised structure 201 is basically composed of ink material, thereby improving the light absorption effect and reducing reflection.

[0082] like Figure 3 As shown, in one specific embodiment, the light folding element 10 is a prism. The two right-angled faces of the prism are connected by a chamfered surface. One of the two right-angled faces is the incident surface of the light, and the other is the exit surface of the light. The chamfered surface has an matting layer 20, which has the following characteristics: Figure 5 The structure shown is as follows. Specifically, the matting layer 20 located on the chamfered surface includes a first ink layer 202, an anti-reflection film layer 204, and a second ink layer 203. This is because, during the production of the optical folding component, the first ink layer 202 is first prepared in the light-shielding area B of the prism; this light-shielding area B can include a portion of the incident surface, a portion of the exit surface, and the entire chamfered surface; then, the anti-reflection film layer 204 is prepared in the light-transmitting area D of the prism. During the preparation of the anti-reflection film layer 204, because the light-transmitting area D is close to the chamfered surface, a portion of the material of the anti-reflection film layer 204 reaches the surface of the first ink layer 202. However, during the application of the optical folding component, when ambient light is incident on the chamfered surface at a large incident angle, the anti-reflection effect of the anti-reflection film layer 204 on this portion of light is poor. Therefore, in order to reduce the reflected light from the chamfered surface, a second ink layer 203 can be prepared on the surface of the antireflective film layer 204 located on the chamfered surface, so that the matting layer 20 at the chamfered surface includes two ink layers and an antireflective film layer 204 located between the two ink layers.

[0083] In some other embodiments, the matting layer 20 may include a first ink layer 202 and an antireflective coating layer 204, which are stacked sequentially in a direction away from the light folding element 10. Specifically, the end of the protruding structure 201 away from the light folding element 10 is located on the antireflective coating layer 204, and the end of the protruding structure 201 close to the light folding element 10 is located on the first ink layer 202. The maximum height of the protruding structure 201 is less than the sum of the thickness of the first ink layer 202 and the thickness of the antireflective coating layer 204. The protruding structure 201 disrupts the continuity of the antireflective coating layer 204, causing the first ink layer 202 to be exposed from the surface of the matting layer 20. In a specific application scenario, the light-emitting surface of a prism may be provided with the aforementioned matting layer 20.

[0084] When specifically setting the protrusion structure 201, the protrusion structure 201 has a variety of structural forms. Figure 6 The structural schematic diagram of the matting layer provided in the embodiments of this application in some embodiments is shown below. Figure 6 As shown, the protrusion structure 201 can be strip-shaped. The protrusion structure 201 can extend along a straight line, or along a broken line or curve. The protrusion structure 201 has its maximum size along the extension direction.

[0085] like Figure 6 As shown, the protruding structure 201 has a first sidewall 2011 and a second sidewall 2012, wherein the first sidewall 2011 and the second sidewall 2012 are located on both sides of the extending direction of the protruding structure 201. The protruding structure 201 may also have a first endwall and a second endwall, which are located at both ends of the extending direction of the protruding structure 201. The first sidewall 2011 is located between the first endwall and the second endwall, and the second sidewall 2012 is also located between the first endwall and the second endwall. The first sidewall 2011 and the second sidewall 2012 can be planar or curved. The first sidewall 2011 forms a partial boundary of the recessed space C, and the second sidewall 2012 forms a partial boundary of another recessed space C.

[0086] Please continue to refer to this. Figure 6 In some embodiments, the first sidewall 2011 and the second sidewall 2012 can be directly connected and form a V-shape. Specifically, the first sidewall 2011 and the second sidewall 2012 are both planes, and the end of the first sidewall 2011 away from the light folding element 10 and the end of the second sidewall 2012 away from the light folding element 10 are directly connected to form an edge. The included angle between the first sidewall 2011 and the second sidewall 2012 can be an acute angle, a right angle, or an obtuse angle.

[0087] From the perspective of cross-sectional shape, the protruding structure 201 with the first sidewall 2011 and the second sidewall 2012 has a triangular cross-section. The plane containing the cross-section is perpendicular to the extending direction of the protruding structure 201.

[0088] In other embodiments, the first sidewall 2011 and the second sidewall 2012 may also be directly connected and form an arc surface. Specifically, the first sidewall 2011 and the second sidewall 2012 are both arc surfaces, with the end of the first sidewall 2011 away from the light folding element 10 and the end of the second sidewall 2012 away from the light folding element 10 directly connected and smoothly transitioned. Optionally, the arc surface formed by the first sidewall 2011 and the second sidewall 2012 can be a circular arc surface or an elliptical arc surface.

[0089] From the perspective of cross-sectional shape, the cross-section of the protruding structure 201 with the first sidewall 2011 and the second sidewall 2012 can be a standard semicircle or a semiellipse, or it can be smaller than a semicircle, smaller than a semiellipse, larger than a semicircle, or larger than a semiellipse. The plane containing the cross-section is perpendicular to the extending direction of the protruding structure 201.

[0090] Apart from Figure 6 In addition to the protrusion structure 201 shown, the protrusion structure 201 may also have other structural forms. Figure 7 Schematic diagrams of the structure of the matting layer provided in the embodiments of this application in other embodiments, such as Figure 7As shown, in addition to the first sidewall 2011 and the second sidewall 2012, the protruding structure 201 may also have a connecting wall 2013, with the first sidewall 2011, the connecting wall 2013, and the second sidewall 2012 connected in sequence. Alternatively, the first sidewall 2011 and the second sidewall 2012 are located on opposite sides of the connecting wall 2013, and the first sidewall 2011 and the second sidewall 2012 are respectively connected to the connecting wall 2013.

[0091] From the shape of the cross-section, Figure 7 The cross-section of the protruding structure 201 shown is rectangular. Specifically, in the protruding structure 201, the first sidewall 2011, the connecting wall 2013, and the second sidewall 2012 are all planes, and the first sidewall 2011 and the connecting wall 2013 are perpendicularly connected, and the second sidewall 2012 and the connecting wall 2013 are perpendicularly connected.

[0092] Figure 8 The diagram shows the structure of the matting layer provided in the embodiments of this application in other embodiments. Figure 8 The protrusion structure 201 shown is Figure 5 Compared to the convex structure 201 shown, the similarity is that... Figure 7 The shown protruding structure 201 also includes a connecting wall 2013, and the first side wall 2011, the connecting wall 2013, and the second side wall 2012 are all planar. The difference is that... Figure 6 In the shown protrusion structure 201, the first sidewall 2011 and the connecting wall 2013 are connected at an obtuse angle. The second sidewall 2012 and the connecting wall 2013 are also connected at an obtuse angle.

[0093] Figure 9 The diagram shows the structure of the matting layer provided in the embodiments of this application in other embodiments. Figure 9 The protrusion structure 201 shown is Figure 7 Compared to the convex structure 201 shown, the similarity is that... Figure 9 The shown protrusion structure 201 also includes a connecting wall 2013, and the connecting wall 2013 is planar. The difference is that... Figure 9 In the convex structure 201 shown, the first sidewall 2011 and the second sidewall 2012 are curved surfaces. The first sidewall 2011, the connecting wall 2013 and the second sidewall 2012 are connected in sequence to form an irregular structure.

[0094] For two adjacent protruding structures 201, the first sidewall 2011 of one protruding structure 201 and the second sidewall 2012 of the other protruding structure 201 form a recessed structure, and the recessed space C is the space contained in the recessed structure. The recessed structure is also strip-shaped, and the extension direction of the recessed structure is consistent with the extension direction of the protruding structure 201.

[0095] Regarding the recessed structure, the first sidewall 2011 and the second sidewall 2012 can be directly connected and form a V-shaped wall or an arc surface. Alternatively, the first sidewall 2011 and the second sidewall 2012 can also be indirectly connected through an intermediate wall. Optionally, the intermediate wall can be a plane.

[0096] In the above embodiments, the protruding structures 201 are all strip-shaped. In addition to strip-shaped, the protruding structures 201 can also be other structural forms. Figure 10 Schematic diagrams of the structure of the matting layer provided in the embodiments of this application in other embodiments, such as Figure 10 As shown, the protruding structure 201 can be a conical structure. However, the specific form of the conical structure is not limited to... Figure 10 The square pyramid shown can also be a cone, a triangular pyramid, or other conical structures.

[0097] Figure 11 Schematic diagrams of the structure of the matting layer provided in the embodiments of this application in other embodiments, such as Figure 11 As shown, the protruding structure 201 can be a spherical cap structure. However, the specific form of the spherical cap structure is not limited to... Figure 11 The cap of the sphere shown can also be the cap of an ellipsoid. Furthermore, the size of the cap can be half a sphere, or less than or more than half a sphere.

[0098] It is understood that in the above embodiments, the protruding structures 201 can be arranged in a two-dimensional plane. Alternatively, the protruding structures 201 can be arranged in a multi-row / multi-column matrix. In a 2*2 matrix, there is a recessed space C between two protruding structures 201 arranged along the row direction, and there is also a recessed space C between two protruding structures 201 arranged along the column direction.

[0099] In addition to conical and spherical structures, the protruding structure 201 can be a columnar or pyramidal structure. Among them, the columnar structure includes, but is not limited to, cylinders, triangular prisms, or square prisms.

[0100] The aforementioned spherical, conical, columnar, and pyramidal structures can be understood as having regular shapes. In other embodiments, the protruding structure 201 can also be an irregular shape.

[0101] When arranging the protruding structure 201, the protruding structure 201 can be arranged in various ways. Figure 12 A schematic diagram of the arrangement of the protrusion structure provided in the embodiments of this application in some embodiments, such as... Figure 12As shown, the protrusion structure 201 is a strip structure, and the multiple protrusion structures 201 included in the matte layer 20 include a first protrusion structure 201a and a second protrusion structure 201b, and the extension direction of the first protrusion structure 201a and the extension direction of the second protrusion structure 201b intersect.

[0102] Specifically, the intersection point formed by the extension direction of the first protrusion 201a and the extension direction of the second protrusion 201b can be located within the first protrusion 201a and the second protrusion 201b. In this case, it can be understood that the first protrusion 201a and the second protrusion 201b intersect. Alternatively, the intersection point can be located outside the first protrusion 201a and the second protrusion 201b. In this case, the first protrusion 201a and the second protrusion 201b do not intersect, but can intersect when their lengths are extended.

[0103] Please continue to refer to this. Figure 12 The matting layer 20 includes a plurality of first protrusions 201a and a plurality of second protrusions 201b. The plurality of first protrusions 201a are arranged sequentially along a first direction X, and the plurality of second protrusions 201b are arranged sequentially along a second direction Y. Furthermore, there is a recessed space C between adjacent first protrusions 201a and adjacent second protrusions 201b. Each first protrusion 201a may intersect with one or more second protrusions 201b. Similarly, each second protrusion 201b may intersect with one or more first protrusions 201a. Overall, the intersecting first protrusions 201a and second protrusions 201b form a mesh-like structure.

[0104] Figure 13 The diagram illustrates the arrangement of the protruding structures provided in this application in other embodiments, wherein the first protruding structure 201a is arranged along a first direction X, and the second protruding structure 201b is arranged along a second direction Y. The first protruding structure 201a and the second protruding structure 201b intersect perpendicularly, thereby forming a mesh.

[0105] Figure 14 The diagram shows the arrangement of the protrusion structure provided in the embodiments of this application in other embodiments. Figure 14 The protrusion structure 201 shown is Figure 12 Compared to the convex structure 201 shown, the similarity is that... Figure 14The shown protrusion structure 201 is also a strip structure, and the extending direction of the first protrusion structure 201a intersects the extending direction of the second protrusion structure 201b. The difference is that the intersection point formed by the extending direction of the first protrusion structure 201a and the extending direction of the second protrusion structure 201b is located outside the first protrusion structure 201a and the second protrusion structure 201b.

[0106] Please continue to refer to this. Figure 14 The matte layer 20 has a plurality of first protrusions 201a and a plurality of second protrusions 201b. The plurality of first protrusions 201a are arranged in a row along a first direction X, and the plurality of second protrusions 201b are also arranged in a row along the first direction X. Furthermore, the first protrusions 201a and the second protrusions 201b are staggered along a second direction Y. The aforementioned first direction X and second direction Y are two mutually perpendicular directions in the first surface.

[0107] Figure 15 This is a schematic diagram showing the arrangement of the protrusion structure provided in the embodiments of this application in other embodiments, such as... Figure 15 As shown, the protrusion structure 201 includes a plurality of third protrusion structures 201c, which are arranged at intervals along the first direction X.

[0108] When specifically setting the third protrusion structure 201c, the third protrusion structure 201c can be a strip structure. For example... Figure 15 As shown, the protrusions 201 distributed on the surface of the matte layer 20 can all be third protrusions 201c. These third protrusions 201c are arranged at intervals along the first direction X, or these third protrusions 201c are arranged in multiple rows in another direction perpendicular to the first direction X, with each row arranged at intervals along the first direction X.

[0109] In other embodiments, the third protrusion structure 201c may be the same protrusion structure 201 as the first protrusion structure 201a, or the third protrusion structure 201c may be the same protrusion structure 201 as the second protrusion structure 201b.

[0110] The spacing and size of the protrusions 201 are closely related to the light scattering effect of the matting layer 20. To clearly illustrate this point, Figure 16 Cross-sectional views of the matting layer along the arrangement direction parallel to the raised structure are shown in some embodiments. Figure 17A cross-sectional view of the matting layer along a direction parallel to the arrangement of the protruding structures is shown in some other embodiments. Specifically, when the spacing between two adjacent protruding structures 201 is large, the arrangement of the protruding structures 201 is relatively sparse, the probability of light incident on the surface of the protruding structure 201 is low, and the light scattering effect is low. Correspondingly, there will be a wider planar region between the protruding structures 201. This planar region will cause parallel incident light to be reflected in the same direction, thereby making the reflected light energy stronger. In other words, when the gap between the protruding structures 201 is large, it will be detrimental to improving the light scattering effect of the matting layer 20.

[0111] In view of the above, in some embodiments, along the arrangement direction of the protrusions 201, the maximum spacing W1 between two adjacent protrusions 201 satisfies: W1 ≤ 100 μm. By constraining the value of W1 within 100 μm, the protrusions 201 can be arranged more densely, thereby increasing the probability of light incident on the surface of the protrusions 201, allowing the light to be reflected in multiple different directions, and thus improving the light scattering effect.

[0112] Optionally, the value of W1 can be 5um, 8um, 10um, 15um, 20um, 30um, 40um, 50um, 60um, 70um, 80um, 90um or other values ​​that meet the above range, which will not be listed one by one in this application.

[0113] As an example, the maximum spacing W1 between two adjacent protrusions 201 satisfies: 20um ≤ W1 ≤ 30um. Optionally, the value of W1 can be 22um, 24um, 26um, 28um, 30um, or other values ​​that satisfy the above range, which are not listed in this application.

[0114] It is understandable that, along the arrangement direction of the protruding structures 201, when the width of the protruding structures 201 is large, the protruding structures 201 will occupy a large area, thus affecting the number of protruding structures 201 arranged in the aforementioned direction, which is detrimental to improving the light scattering effect of the matting layer 20. In view of the above, in some embodiments, along the arrangement direction of the protruding structures 201, the maximum width W2 of the protruding structures 201 satisfies: W2 ≤ 100 μm. By constraining the value of W2 within 100 μm, the phenomenon that the number of protruding structures 201 is limited due to their large width can be alleviated, further improving the light scattering effect of the matting layer 20.

[0115] Optionally, the value of W2 can be 5um, 8um, 10um, 15um, 20um, 30um, 40um, 50um, 60um, 70um, 80um, 90um or other values ​​that meet the above range, which will not be listed one by one in this application.

[0116] As an example, the maximum spacing W2 between two adjacent protrusions 201 satisfies: 20um ≤ W2 ≤ 50um. Optionally, the value of W2 can be 22um, 24um, 26um, 28um, 30um, 35um, 40um, 45um, or other values ​​that satisfy the above range, which will not be listed one by one in this application.

[0117] Taking into account the influence of the spacing between two adjacent protrusions 201 and the width of the protrusion 201 on the scattering effect of the extinction layer 20, in some embodiments, the maximum spacing W1 between two adjacent protrusions 201 and the maximum width W2 of the protrusion 201 satisfy: 0.4 ≤ W1 / W2 ≤ 1.5. Optionally, the ratio of W1 / W2 can be 0.5, 0.7, 0.9, 1.1, 1.3 or other values ​​that satisfy the above range, which are not listed one by one in this application.

[0118] The above relationship can also be understood as: 0.4W2≤W1≤1.5W2, -0.6W2≤W1-W2≤0.5W2. When the value of W2 is constant, the maximum value of W1 is 1.5W2, and the minimum value is 0.4W2. The absolute value of the difference between the two is no greater than 0.6W2, thus making the protrusions and depressions on the surface of the matting layer 20 match, avoiding an excessive difference between the protrusions and depressions, and thereby improving the light scattering effect of the matting layer 20.

[0119] Please continue to refer to this. Figure 16 and Figure 17 The maximum height H of the protruding structure 201 can be understood as the maximum depth of the recessed space C, and the maximum distance W1 between two adjacent protruding structures 201 can be understood as the maximum width of the recessed space C between the two protruding structures 201. When the maximum distance W1 between two adjacent protruding structures 201 is constant, the larger the ratio of H / W1, the larger H is, and the larger the height of the protruding structure 201, or in other words, the deeper the recessed space C. Light may not be able to reach the area near the light folding element 10 on the sidewall of the protruding structure 201, or the bottom area of ​​the sidewall, resulting in lower utilization of this area. Conversely, the smaller the ratio of H / W1, the smaller H is, and the smaller the height of the protruding structure 201, or in other words, the shallower the recessed space C. The surface of the matting layer 20 is closer to a plane, which is also not conducive to light scattering.

[0120] In view of the above, in some embodiments, the maximum height H of the protruding structure 201 and the maximum distance W1 between two adjacent protruding structures 201 satisfy: 0.3 ≤ H / W1 ≤ 1. Optionally, the ratio of H / W1 can be 0.4, 0.5, 0.6, 0.7, 0.8, 0.9 or other values ​​that satisfy the above range, which will not be listed one by one in this application.

[0121] In some embodiments, the maximum height H of the protrusion structure 201 satisfies: 3um ≤ H ≤ 10um. Optionally, the value of H can be 4um, 5um, 6um, 7um, 8um, 9um, or other values ​​that satisfy the above range, which will not be listed one by one in this application. The maximum depth of the recessed space C is also within the above range, and the maximum depth of the recessed space C is less than the thickness of the matte layer 20.

[0122] The above content describes the shape, arrangement, size, and spacing of the protrusions 201 in the matting layer 20. The following section will describe the distribution of the matting layer 20 on the surface of the light folding element 10.

[0123] When specifically setting up optical folding elements, optical folding elements can have various structural forms. Figure 18 The structural schematic diagrams of the light folding component provided in the embodiments of this application in some embodiments are as follows: Figure 18 As shown, the optical folding element 10 has a first surface 101 and a second surface 102. The plane containing the first surface 101 and the plane containing the second surface 102 intersect, and a chamfered surface 103 is provided between the first surface 101 and the second surface 102. The first surface 101 is connected to the second surface 102 through the chamfered surface 103. If the line of intersection of the plane containing the first surface 101 and the plane containing the second surface 102 is denoted as OP, then the chamfered surface 103 is located at the end of the first surface 101 and the second surface 102 closest to the line of intersection OP. The chamfered surface 103 serves as a transition connection between the first surface 101 and the second surface 102, which can reduce stress concentration at the edge of the optical folding element 10, improve the structural strength of the optical folding element 10, and extend the service life of the optical folding element 10.

[0124] When specifically designing the chamfered surface 103, the chamfered surface 103 can have various structural forms. For example... Figure 18 As shown, the chamfered surface 103 can be a plane. This chamfered surface 103 can be formed by grinding the edges of the light folding element 10, a simple manufacturing process with low cost. Besides a plane, the chamfered surface 103 can also be a curved surface. The curved surface form of the light folding component 1 will be described below.

[0125] Figure 19 and Figure 20These are schematic diagrams of the optical folding assembly provided in this application in other embodiments. The similarity between them lies in that the chamfered surface 103 between the first surface 101 and the second surface 102 is a curved surface, and the chamfered surface 103 protrudes towards the side where the intersection line OP of the first surface 101 and the second surface 102 is located. The difference between them lies in... Figure 19 The chamfered surface 103 shown is an arc surface. That is to say, the first surface 101 and the second surface 102 can be connected by a smooth arc surface. Figure 20 The chamfered surface 103 shown includes multiple sub-parts, each extending along the direction of the intersection line OP of the first surface 101 and the second surface 102. Each sub-part can be a plane or a curved surface. These multiple sub-parts are arranged side by side between the first surface 101 and the second surface 102 and connected sequentially. The connected whole protrudes towards the side of the intersection line OP, thereby serving as a transition connection between the first surface 101 and the second surface 102.

[0126] This application does not limit the number of sub-parts; however, it is understood that as the number of sub-parts increases, the chamfered surface 103 approaches a curved surface. Figure 20 In the illustrated embodiment, the chamfered surface 103 comprises three sub-parts, each of which is a plane. In other embodiments, the middle sub-part may also be curved. Furthermore, the chamfered surface 103 may also comprise other numbers of sub-parts, which are not listed here.

[0127] In the aforementioned optical folding element 10, the first ink layer 202 may cover at least a portion of the chamfered surface 103. Alternatively, the first ink layer 202 may also cover at least a portion of the first surface 101. Furthermore, the first ink layer 202 may also cover at least a portion of the second surface 102. In specific implementations, the first ink layer 202 may cover at least one of the chamfered surface 103, the first surface 101, and the second surface 102. The surface of the first ink layer 202 may also be provided with an anti-reflective coating layer 204, or a combination of the anti-reflective coating layer 204 and the second ink layer 203.

[0128] It is understood that the optical folding element 10 may have multiple main surfaces and multiple chamfered surfaces 103, with any two adjacent main surfaces connected by the chamfered surfaces 103. The first surface 101 and the second surface 102 may be any two adjacent main surfaces. Therefore, when arranging the first ink layer 202, the first ink layer 202 may be located on one or more of the main surfaces, or the first ink layer 202 may be located on one or more of the chamfered surfaces 103.

[0129] In some embodiments, the optical folding element 10 includes an incident surface and an exit surface among its plurality of main surfaces. The incident surface is located on the object side of the optical folding element 10, allowing ambient light to enter the optical folding element 10 from the incident surface. The exit surface is located on the image side of the optical folding element 10, allowing ambient light to exit from the exit surface after reflection or refraction within the optical folding element 10. The first surface 101 can be either the incident surface or the exit surface. Alternatively, the first surface 101 can be any surface other than the incident and exit surfaces. Similarly, the second surface 102 can be either the incident surface, the exit surface, or any surface other than the incident and exit surfaces.

[0130] When the first ink layer 202 is applied to the chamfered surface 103, the first ink layer 202 can cover the entire area of ​​the chamfered surface 103. When the first ink layer 202 is applied to the incident surface, the first ink layer 202 covers a portion of the incident surface. Specifically, the incident surface has a first light-transmitting area and a first light-blocking area, and the first ink layer 202 covers the first light-blocking area. The first light-blocking area can surround the first light-transmitting area, and the first light-transmitting area can be circular, elliptical, rectangular, or other shapes, which are not listed in this application. When the first ink layer 202 is applied to the exiting surface, the first ink layer 202 covers a portion of the exiting surface. The exiting surface has a second light-transmitting area and a second light-blocking area, and the first ink layer 202 covers the second light-blocking area. The second light-blocking area can surround the second light-transmitting area, and the second light-transmitting area can be circular, elliptical, rectangular, or other shapes, which are not listed in this application.

[0131] In some embodiments, the light folding element 10 includes a reflective surface, and the first surface 101 is a reflective surface. When light is incident on the reflective surface from the outside, the light can be reflected by the reflective surface and directed towards other optical elements. Optionally, the light folding element 10 can be a mirror. When the first ink layer 202 is arranged, the first ink layer 202 can be located on the reflective surface, the surface adjacent to the reflective surface, or the chamfered surface 103 between the reflective surface and other surfaces.

[0132] When the first ink layer 202 is arranged on the reflective surface, the reflective surface has a reflective area and a third light-shielding area, and the first ink layer 202 can cover the third light-shielding area. The third light-shielding area can surround the reflective area, and the reflective area can be circular, elliptical, rectangular or other shapes, which will not be listed in this application.

[0133] It is understood that in some embodiments, the light folding element 10 may not have a chamfered surface 103, and two adjacent surfaces of the light folding element 10 may intersect directly. At least a portion of the surface is provided with a first ink layer 202, and the side of the first ink layer 202 facing away from the light folding element 10 has a raised structure 201.

[0134] In addition, the light folding element 10 can be provided with a first ink layer 202 having a raised structure 201, or a first ink layer 202 without a raised structure 201 can be provided on a portion of its surface.

[0135] There are various methods for fabricating the protrusion structure 201. For example, the matting layer 20 can be treated with a laser, or it can be treated with chemical etching. Figure 21 Schematic diagrams of the fabrication process of the protrusion structure provided in the embodiments of this application in some embodiments, such as... Figure 21 As shown, the equipment for fabricating the protruding structure 201 includes a support plate 4, a fixing component 5, and a laser component 6. In the fabrication of the protruding structure 201, firstly, the optical folding component 1 is placed on the surface of the support plate 4 and fixed by the fixing component 5. The surface to be processed in the optical folding component 1 faces the laser component 6, allowing the laser beam emitted by the laser component 6 to irradiate the surface of the extinction layer 20. The laser component 6 includes a laser source and a lens assembly; the laser beam emitted by the laser source is focused into a laser spot on the surface to be processed after passing through the lens assembly. Then, the laser is moved along the Z-axis so that the emitted laser spot irradiates the surface of the extinction layer 20 at a suitable height, thereby generating a target processing depth on the surface of the extinction layer 20. Based on the desired pattern of the protruding structure 201 array, the movement of the laser component along a path parallel to the surface of the extinction layer 20 can be controlled. In practice, key parameters such as the power, frequency, and moving speed of the laser component can be adjusted.

[0136] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A light folding component, characterized in that, It includes an optical folding element and a first ink layer located on the surface of the optical folding element; the first ink layer has a plurality of protrusions on the side opposite to the optical folding element, and there is a recessed space between two adjacent protrusions.

2. The light folding component as described in claim 1, characterized in that, The optical folding assembly further includes a second ink layer and an anti-reflection film layer, wherein the first ink layer, the anti-reflection film layer and the second ink layer are stacked sequentially along a direction away from the optical folding element; The end of the protrusion structure away from the light folding element is located in the second ink layer, and the end of the protrusion structure close to the light folding element is located in the first ink layer.

3. The light folding component as described in claim 1 or 2, characterized in that, The protruding structure is a strip-shaped structure.

4. The light folding component as described in claim 3, characterized in that, The plurality of protrusion structures include a first protrusion structure and a second protrusion structure, wherein the extension direction of the first protrusion structure and the extension direction of the second protrusion structure intersect.

5. The light folding component as described in claim 3, characterized in that, The plurality of protrusion structures include a plurality of third protrusion structures, which are arranged sequentially along the first direction.

6. The light folding component as described in claim 3, characterized in that, The protruding structure has a first sidewall and a second sidewall, which are directly connected to form a V-shaped wall or an arc-shaped wall. Alternatively, the protruding structure may include a first sidewall, a top wall, and a second sidewall connected in sequence.

7. The light folding component as described in claim 1 or 2, characterized in that, Along the arrangement direction of the protrusions, the maximum spacing W1 between two adjacent protrusions satisfies: W1≤100um; And / or, along the arrangement direction of the protrusion structure, the maximum width W2 of the protrusion structure satisfies: W2≤100um.

8. The light folding component as described in claim 1 or 2, characterized in that, Along the arrangement direction of the protrusions, the maximum spacing W1 between two adjacent protrusions and the maximum width W2 of the protrusion satisfy: 0.4≤W1 / W2≤1.

5.

9. The light folding component as described in claim 1 or 2, characterized in that, The maximum height H of the protrusion along the thickness direction of the first ink layer and the maximum distance W1 between two adjacent protrusions satisfy: 0.3≤H / W1≤1.

10. The light folding assembly as described in claim 1 or 2, characterized in that, The protruding structure can be a conical structure, a cylindrical structure, or a spherical crown structure.

11. The light folding assembly as described in claim 1 or 2, characterized in that, The optical folding element has a first surface and a second surface, the plane containing the first surface and the plane containing the second surface intersect, and a chamfered surface is provided between the first surface and the second surface; The first ink layer at least partially covers the first surface; And / or, the first ink layer at least partially covers the second surface; And / or, the first ink layer at least covers a portion of the chamfered surface.

12. The light folding component as described in claim 1 or 2, characterized in that, The light folding element is a prism or a reflector.

13. A camera module, characterized in that, It includes an image sensor and a light folding assembly as described in any one of claims 1 to 12, wherein the image sensor is located on the image side of the light folding assembly.

14. An electronic device, characterized in that, It includes a housing and a camera module as described in claim 13, wherein the camera module is located within the housing.

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