Camera module and electronic device

Abstract

This application relates to a camera module and electronic device. The camera module includes a lens, an image acquisition module, an optical transmission element, and a stray light elimination structure. The optical transmission element is configured such that light captured by the lens can enter the optical transmission element from the light-transmitting surface and be reflected sequentially through a first reflective surface, a light-transmitting surface, a second reflective surface, a light-transmitting surface, and a third reflective surface to the image acquisition module. The stray light elimination structure is used to eliminate stray light in the light reflected by at least one of the first reflective surface, the second reflective surface, and the light-transmitting surface. The camera module and electronic device of this application improve the telephoto shooting effect by using multiple reflections of light through the optical transmission element and reduce the module height to facilitate module miniaturization. Moreover, by using the stray light elimination structure to eliminate stray light in the light reflected by at least one of the first reflective surface, the second reflective surface, and the light-transmitting surface, stray light is less likely to enter the image acquisition module, thereby reducing glare.

Description

Technical Field

[0001] This application relates to the field of camera device technology, and in particular to a camera module and electronic device. Background Technology

[0002] With the development of mobile phone imaging, consumers have higher and higher requirements for the image quality of photos and videos taken by mobile phones, especially for long-distance shooting. However, the longer the focal length of the telephoto module required for long-distance shooting, the larger the module will be (especially the height), which contradicts the goal of making the whole device thinner and lighter.

[0003] To reduce the height of telephoto modules, periscope modules are typically designed by adding a right-angle prism to deflect the light path. Compared to conventional upright modules, the right-angle prism in a periscope module simply deflects the optical axis by 90°, changing the direction of the light path from the height direction to the length direction. While this reduces the module height, making it comparable to an upright module in terms of height, thus facilitating telephoto shooting while maintaining the slimness of electronic devices, the longer the lens focal length, the larger the module's length becomes. The periscope module's length is significantly longer than that of an upright module, which in turn occupies more space in the length of the electronic device and compresses the battery's length design.

[0004] In related technologies, in order to balance the height and length of the camera module, based on the periscope design concept, an attempt is made to use a prism to deflect light multiple times to achieve a reasonable balance between the height and length of the module for telephoto shooting.

[0005] However, an increase in the number of light reflections in the camera module increases the likelihood of glare during imaging. Summary of the Invention

[0006] This application provides a camera module and electronic device to solve the problem of how to balance telephoto shooting effect and module miniaturization while reducing glare.

[0007] On one hand, this application provides a camera module, including:

[0008] Lens;

[0009] An image acquisition module is spaced apart from the lens, and the optical axis of the image acquisition module is parallel to the optical axis of the lens;

[0010] An optical transmission element includes a light-transmitting surface, a first reflective surface, a second reflective surface, and a third reflective surface. The light-transmitting surface is perpendicular to the optical axis of the lens, and the second reflective surface is parallel to the light-transmitting surface. The lens and the image acquisition module are both located on the side of the second reflective surface facing away from the light-transmitting surface. The first reflective surface and the third reflective surface are both located between the light-transmitting surface and the second reflective surface, and are inclined outward relative to the second reflective surface. The optical transmission element is configured such that light collected by the lens can enter the optical transmission element from the light-transmitting surface and be reflected sequentially through the first reflective surface, the light-transmitting surface, the second reflective surface, the light-transmitting surface, and the third reflective surface to the image acquisition module.

[0011] A stray light elimination structure is disposed in the optical path between the first reflective surface and the third reflective surface of the optical transmission element. The stray light elimination structure is used to eliminate stray light in the light reflected by at least one of the first reflective surface, the second reflective surface and the light-transmitting surface.

[0012] On the other hand, this application provides an electronic device including the camera module as described above.

[0013] The aforementioned camera module and electronic device not only achieve multiple reflections of light to improve telephoto shooting effects and reduce module height by configuring optical transmission elements to allow light collected by the lens to enter the optical transmission elements from the light-transmitting surface and be reflected sequentially through the first reflective surface, the light-transmitting surface, the second reflective surface, the light-transmitting surface, and the third reflective surface to the image acquisition module, but also utilize a stray light elimination structure to eliminate stray light in the light reflected by at least one of the first reflective surface, the second reflective surface, and the light-transmitting surface, making it less likely for stray light to enter the image acquisition module, thereby reducing glare. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application 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 application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a rear view schematic diagram of an electronic device in one embodiment.

[0016] Figure 2 This is a schematic diagram of the camera module in one embodiment.

[0017] Figure 3 This is a schematic diagram of the optical path of a camera module in one embodiment.

[0018] Figure 4 This is a schematic diagram of the structure of the optical transmission element of the camera module in one embodiment.

[0019] Figure 5 This is a schematic diagram of the impurity removal structure in the optical transmission element of a camera module in one embodiment.

[0020] Figure 6 for Figure 5 The diagram shows the optical path of one of the stray beams from the camera module.

[0021] Figure 7 This is a schematic diagram of the impurity removal structure in the optical transmission element of the camera module in another embodiment.

[0022] Figure 8 for Figure 7 The diagram shows the optical path of one of the stray beams from the camera module.

[0023] Figure 9 This is a schematic diagram of the impurity removal structure in the optical transmission element of the camera module in another embodiment.

[0024] Figure 10 This is a schematic diagram of the optical transmission element of the camera module in another embodiment.

[0025] Figure 11 This is a schematic diagram of the structure of the first prism in some embodiments.

[0026] Figure 12 This is a schematic diagram of the structure of the first reflective surface, the second reflective surface, and the third reflective surface in some embodiments.

[0027] Figure 13 This is a schematic diagram of the structure of the first reflective surface in some embodiments.

[0028] Figure 14 This is a schematic diagram of the structure of the third reflective surface in some embodiments.

[0029] Figure 15 This is a schematic diagram of the structure of the light-transmitting surface in some embodiments.

[0030] Figure 16 This is a schematic diagram of the image acquisition module of a camera module in one embodiment.

[0031] Figure 17 This is a schematic diagram of the structure of an electronic device in one embodiment.

[0032] Figure label:

[0033] 10. Electronic device; 11. Housing; 111. Light-transmitting part; 12. Decorative part; 20. Camera module; 20a. Base; 22. Lens; 221. Fixed lens group; 222. Movable lens group; 22a. Lens; 23. Image acquisition module; 23a. Mounting base; 23b. Support base; 231. Circuit board; 232. Image sensor; 24. Optical transmission element; 24a. First reflective surface; 24b. Third reflective surface; 24c. Light-transmitting surface; 24d. Second reflective surface; 24e. Refractive part; 24f. First light-transmitting area; 24g. Second light-transmitting area; 241. First prism; 241a. First adhesive surface; 241b. 242. Second prism; 243. Third prism; 246. Anti-reflective coating; 247. Chamfer; 248. Glue; 249. Light-absorbing material layer; 25. Impurity removal structure; 251. First aperture; 252. Second aperture; 253. Light-shielding sheet; 254. Air layer; 255. Light-blocking component; C1. First groove; C2. Second groove; C3. Third groove; 244. First light-absorbing component; 245. Second light-absorbing component; FR. Reflective film; OIS. Anti-shake module; 201. Flexible support sheet; 201a. Connecting part; 201b. Floating part; 201c. Elastic component; 202. Magnet; 203. Coil; 26. Filter element. Detailed Implementation

[0034] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings. Preferred embodiments of this application are shown in the drawings. However, this application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of this application.

[0035] As used herein, "electronic device" refers to, but is not limited to, a device capable of receiving and / or transmitting communication signals connected via any one or more of the following connection methods:

[0036] (1) Via wired connection, such as via Public Switched Telephone Networks (PSTN), Digital Subscriber Line (DSL), digital cable, or direct cable connection;

[0037] (2) Via wireless interface, such as cellular network, wireless local area network (WLAN), digital television network such as DVB-H network, satellite network, AM-FM broadcast transmitter.

[0038] An electronic device configured to communicate via a wireless interface can be referred to as a "mobile terminal". Examples of mobile terminals include, but are not limited to, the following electronic devices:

[0039] (1) Satellite phone or cellular phone;

[0040] (2) A Personal Communications System (PCS) terminal that can combine cellular radio telephone with data processing, fax and data communication capabilities;

[0041] (3) Radio telephone, pager, Internet / intranet access, web browser, notepad, calendar, personal digital assistant (PDA) equipped with a Global Positioning System (GPS) receiver;

[0042] (4) Conventional above-knee and / or palm-sized receivers;

[0043] (5) Conventional knee-mounted and / or handheld wireless telephone transceivers, etc.

[0044] Please see Figure 1 As shown, the electronic device 10 includes a housing 11, and components such as a camera module 20, a motherboard (not shown), and a battery (not shown) are disposed within the space enclosed by the housing 11. The motherboard may integrate the processor, power management module, storage unit, and baseband chip of the electronic device 10. It is understood that the electronic device 10 in this embodiment includes, but is not limited to, mobile phones, tablet computers, and other portable electronic devices 10.

[0045] In some embodiments, the housing 11 is provided with a light-transmitting portion 111. This light-transmitting portion 111 can be a light-entry hole penetrating the housing 11, or it can be a structural component such as glass or light-transmitting plastic. Taking the housing 11 having a light-entry hole as an example, the camera module 20 is disposed within the space enclosed by the housing 11, and the lens 22 of the camera module 20 is positioned corresponding to the light-entry hole, so that light from outside the electronic device 10 can enter the lens 22 to meet the needs of the camera module 20 for imaging.

[0046] Combination Figure 2 As shown, the camera module 20 includes a lens 22, an image acquisition module 23, an optical transmission element 24, and a noise reduction structure 25. The image acquisition module 23 is spaced apart from the lens 22, and the optical axis of the image acquisition module 23 is parallel to the optical axis of the lens 22. In this embodiment, the lens 22 and the image acquisition module 23 are located on the same side of the optical transmission element 24.

[0047] To facilitate understanding, the structure of the optical transmission element 24 will be explained below.

[0048] Combination Figure 3 As shown, the optical transmission element 24 includes a light-transmitting surface 24c, a first reflective surface 24a, a second reflective surface 24d, and a third reflective surface 24b. The light-transmitting surface 24c is perpendicular to the optical axis of the lens 22, and the second reflective surface 24d is parallel to the light-transmitting surface 24c. That is, the second reflective surface 24d and the light-transmitting surface 24c are two parallel surfaces in the optical transmission element 24. In this embodiment, both the lens 22 and the image acquisition module 23 are located on the side of the second reflective surface 24d that faces away from the light-transmitting surface 24c. Since the optical axes of the lens 22 and the image acquisition module 23 are parallel and both perpendicular to the light-transmitting surface 24c, both the lens 22 and the image acquisition module 23 are oriented towards the light-transmitting surface 24c of the optical transmission element 24 along their respective optical axes.

[0049] The first reflective surface 24a and the third reflective surface 24b are both located between the light-transmitting surface 24c and the second reflective surface 24d, and are tilted outward relative to the second reflective surface 24d. The optical transmission element 24 is configured such that the light collected by the lens 22 can enter the optical transmission element 24 from the light-transmitting surface 24c, and be reflected sequentially through the first reflective surface 24a, the light-transmitting surface 24c, the second reflective surface 24d, the light-transmitting surface 24c and the third reflective surface 24b to the image acquisition module 23.

[0050] The stray light elimination structure 25 is disposed in the optical path between the first reflective surface 24a and the third reflective surface 24b of the optical transmission element 24, and is used to eliminate stray light in the light reflected by at least one of the first reflective surface 24a, the second reflective surface 24d and the light-transmitting surface 24c.

[0051] The aforementioned camera module 20 not only achieves multiple reflections of light to enhance telephoto shooting effects by enabling the light collected by the lens 22 to enter the optical transmission element 24 from the light-transmitting surface 24c, and then be reflected sequentially through the first reflective surface 24a, the light-transmitting surface 24c, the second reflective surface 24d, the light-transmitting surface 24c, and the third reflective surface 24b to the image acquisition module 23, but also utilizes the anti-sparking structure 25 set on the optical transmission element 24 to eliminate stray light in the light reflected by at least one of the first reflective surface 24a, the second reflective surface 24d, and the light-transmitting surface 24c, making it less likely for stray light to enter the image acquisition module 23, thereby reducing glare.

[0052] In some embodiments, the first reflective surface 24a and the third reflective surface 24b are both connected between the light-transmitting surface 24c and the second reflective surface 24d, and the first reflective surface 24a and the third reflective surface 24b are inclined relative to the light-transmitting surface 24c towards the second reflective surface 24d. It should be noted that the angle between the first reflective surface 24a and the light-transmitting surface 24c can be less than or equal to 45°, for example, it can be 20° to 35°, and the angle between the third reflective surface 24b and the light-transmitting surface 24c can be less than or equal to 45°, for example, it can be 20° to 35°.

[0053] The first reflective surface 24a is opposite to the lens 22 along the optical axis of the lens 22, and the third reflective surface 24b is opposite to the image acquisition module 23 along the optical axis of the image acquisition module 23, so that the light collected by the lens 22 can be reflected by multiple surfaces of the optical transmission element 24 and finally emitted to the image acquisition module 23 for imaging.

[0054] In this embodiment, the optical transmission element 24 can be composed of multiple prisms or be a single integrated structure. For ease of understanding, the corresponding technical solutions for eliminating stray light will be described below in conjunction with the structure of the optical transmission element 24.

[0055] Combination Figure 4 and Figure 5 As shown, in some embodiments, the optical transmission element 24 includes a first prism 241, a second prism 242, and a third prism 243. The first prism 241 includes a first adhesive surface 241a and a second adhesive surface 241b that are inclined inward relative to the second reflective surface 24d. The second prism 242 is glued to the first adhesive surface 241a with adhesive 248, and the third prism 243 is glued to the second adhesive surface 241b with adhesive 248. In this embodiment, the absolute value of the difference between the refractive index of the adhesive 248 and the refractive index of the material used in the optical transmission element 24 is less than or equal to 0.05, in order to reduce the probability of glare.

[0056] like Figure 5 As shown, the stray light elimination structure 25 includes a first light barrier 251, which is disposed on the first adhesive surface 241a and is used to eliminate stray light in the light reflected from the first reflective surface 24a through the light-transmitting surface 24c.

[0057] The stray light elimination structure 25 includes a second light barrier 252, which is disposed on the second adhesive surface 241b and is used to eliminate stray light in the reflected light from the second reflective surface 24d.

[0058] In the above embodiment, a light barrier is provided at the bonding surface between the prisms to block stray light, reducing the amount of stray light entering the image acquisition module 23 and thus lowering the probability of glare. The first light barrier 251 and the second light barrier 252 can be formed by screen printing. For example, light barriers can be formed by screen printing light-blocking ink at the positions of the first bonding surface 241a and the second bonding surface 241b corresponding to the stray light irradiation, thereby blocking the stray light and reducing the probability of stray light entering the image acquisition module 23, thus reducing the probability of glare.

[0059] Combination Figure 5 and Figure 6As shown, the surface of the second prism 242 facing the first adhesive surface 241a can be parallel to the first adhesive surface 241a, and the second adhesive surface 241b can be parallel to the surface of the third prism 243 facing the second adhesive surface 241b. When the imaging light is reflected once or multiple times within the second prism 242 and strikes the interface between the second prism 242 and the adhesive 248 between the second prism 242 and the first prism 241, and when it is reflected within the first prism 241 and strikes the interface between the first prism 241 and the adhesive 248 between the first prism 241 and the third prism 243, since both the surface of the second prism 242 facing the first adhesive surface 241a and the second adhesive surface 241b are inclined to the light-transmitting surface 24c, the imaging light is... The angle of incidence of the second prism 242 toward the surface of the first adhesive surface 241a and the angle of incidence of the second adhesive surface 241b will not be too large. The imaging light is not easily reflected on the surface of the second prism 242 toward the first adhesive surface 241a and the second adhesive surface 241b. It is easy to pass through the glue 248 between the first prism 241 and the second prism 242 and into the second prism 242. It is also easy to pass through the glue 248 between the second prism 242 and the third prism 243 and into the third prism 243. Stray light incident from inside the second prism 242 onto the surface of the second prism 242 facing the first prism 241, and from inside the first prism 241 onto the second adhesive surface 241b, typically has an incident angle much larger than that of the imaging light. Combined with the design that the refractive index of the adhesive 248 between the second prism 242 and the first prism 241, and the adhesive 248 between the first prism 241 and the third prism 243, is lower than that of the first prism 241 and the second prism 242, stray light is more likely to undergo total internal reflection on the surface of the second prism 242 facing the first adhesive surface 241a and the second adhesive surface 241b, thus deviating from the propagation path of the imaging light. For example, the stray light, after reflection, exits the second prism 242 from the light-transmitting surface 24c, or exits the first prism 241 from the second reflective surface 24d, thereby reducing stray light. As can be seen, by setting three adhesive prisms in the optical transmission element 24 and designing the angles of the first adhesive surface 241a and the second adhesive surface 241b, as well as the adhesive 248, the stray light reduction method is not limited by the incident position of the stray light. It can also reduce stray light that hits the middle part of the surface of the second prism 242 facing the first adhesive surface 241a and the middle part of the second adhesive surface 241b, effectively improving the imaging quality of the camera module 20.

[0060] In another embodiment where the optical transmission element 24 is equipped with a glued prism, a prism structure can be divided into three glued prisms: a first prism 241, a second prism 242, and a third prism 243. The stray light reduction effect is achieved by designing the refractive index and angle of the glue 248 between the first prism 241 and the second prism 242, and between the second prism 242 and the third prism 243. Thus, the stray light reduction design is tightly integrated with the prism structure of the optical transmission element 24, without increasing the space occupied by the optical transmission element 24. Furthermore, by dividing the optical transmission element 24 into three glued prisms and designing the refractive index and angle of the glue 248 between the three prisms, the glue 248 between the second prism 242 and the first prism 241, and the glue 248 between the first prism 241 and the third prism 243, can reduce stray light twice, for example... Figure 6 The stray light transmission path indicated by the dashed arrow allows stray light that was not reduced between the second prism 242 and the first prism 241 to be reduced again between the first prism 241 and the third prism 243 when it travels from the first prism 241 to the second cemented surface 241b. This effectively improves the stray light reduction effect and thus enhances the imaging quality of the camera module 20.

[0061] In some embodiments, the optical transmission element 24 satisfies the condition: arcsin(n2 / n1) ≤ π / 2 - a; where n1 is the refractive index of the second prism 242, n2 is the refractive index of the adhesive 248 between the second prism 242 and the first prism 241, and a is the radian of the angle between the surface of the second prism 242 facing the first adhesive surface 241a and the light-transmitting surface 24c. π / 2 - a represents the angle of incidence of stray light parallel to the light-transmitting surface 24c on the surface of the second prism 242 facing the first adhesive surface 241a. When the above conditions are met, the stray light parallel to the light-transmitting surface 24c and the stray light incident on the surface of the second prism 242 facing the first adhesive surface 241a at a larger incident angle are both at an incident angle greater than the critical angle of total internal reflection. This can increase the probability of total internal reflection of stray light on the surface of the second prism 242 facing the first adhesive surface 241a, thereby improving the effect of stray light reduction.

[0062] Understandably, through the rational design of the three cemented prisms, light can undergo five reflections within the optical transmission element 24, effectively extending the light transmission path within the optical transmission element 24 and achieving the effect of folded light path, adapting to the telephoto design of the lens 22, while also helping to reduce the space occupied by the camera module 20. Meanwhile, by... Figure 5As can be seen from the transmission path of the imaging light shown, the surface of the second prism 242 facing the first adhesive surface 241a and the second adhesive surface 241b are inclined to the light-transmitting surface 24c, and the surface of the second prism 242 facing the first adhesive surface 241a and the light-transmitting surface 24c form an acute angle, while the second adhesive surface 241b and the light-transmitting surface form an obtuse angle. This design can be combined with the design of the five-fold reflection transmission path of the optical transmission element 24, effectively reducing the incident angle when the imaging light hits the surface of the second prism 242 facing the first adhesive surface 241a and the second adhesive surface 241b, reducing the reflection probability of the imaging light on the surface of the second prism 242 facing the first adhesive surface 241a and the second adhesive surface 241b, thereby reducing the influence of the setting of the glue 248 between the three prisms on the transmission of the imaging light.

[0063] In some embodiments, the angle between the first adhesive surface 241a and the light-transmitting surface 24c, and the acute angle between the second adhesive surface 241b and the light-transmitting surface 24c are 30°-45°. This is beneficial for adapting to the transmission path of imaging light, reducing the impact of the adhesive 248 on the transmission process of imaging light, and increasing the incident angle of stray light on the surface of the second prism 242 facing the first adhesive surface 241a and the second adhesive surface 241b, thereby increasing the reflection probability of stray light and improving the effect of stray light reduction.

[0064] In some embodiments, the optical transmission element satisfies: n1 / n2 ≥ 1.22, where n1 is the refractive index of the first prism 241 and the second prism 242, and n2 is the refractive index of the adhesive 248 between the first prism 241 and the second prism 242, and the refractive index of the adhesive 248 between the first prism 241 and the third prism 243. Combining the calculation formula for the critical angle of total internal reflection, it can be seen that when the above condition is met, stray light incident on the surface of the second prism 242 facing the first adhesive surface 241a at an incident angle greater than or equal to 45° can undergo total internal reflection and be reduced on the surface of the second prism 242 facing the first adhesive surface 241a. This can be coordinated with the angle range between the surface of the second prism 242 facing the first adhesive surface 241a and the light-transmitting surface 24c, effectively reducing most of the stray light and improving the stray light reduction effect. In some embodiments, the optical transmission element 24 satisfies: 1.6≤n1≤2.2; 1.3≤n2≤1.6. For example, the refractive index of the first prism 241 and the second prism 242 can be 2.05, and the refractive index of the glue 248 between the first prism 241 and the second prism 242, and the glue 248 between the second prism 242 and the third prism 243 can be 1.4.

[0065] In some embodiments, the distance between the surface of the second prism 242 facing the first adhesive surface 241a and the first adhesive surface 241a, and the distance between the surface of the third prism 243 facing the second adhesive surface 241b and the second adhesive surface 241b, i.e., the thickness of the adhesive 248 between the second prism 242 and the first prism 241, and between the first prism 241 and the third prism 243, is 1.5um-15um. This ensures that there is sufficient distance between the first prism 241 and the second prism 242, and between the second prism 242 and the third prism 243, to provide a structural basis for the total internal reflection of stray light by the adhesive 248. At the same time, it can also reduce the impact of the adhesive 248 on the structural reliability and volume of the optical transmission element 24.

[0066] refer to Figure 5 As shown, in some embodiments, the first adhesive surface 241a and the second adhesive surface 241b are connected, so the first prism 241 can be approximately triangular in shape, with the first adhesive surface 241a, the second adhesive surface 241b, and the second reflective surface 24d being the three sides of the first prism 241. (Reference) Figure 6 As shown, in some other embodiments, the first adhesive surface 241a and the second adhesive surface 241b are spaced apart, and a portion of the light-transmitting surface 24c is connected to the first adhesive surface 241a and the second adhesive surface 241b. In this case, the first prism 241 can be approximately in the shape of a trapezoidal prism with a cross-section. The portion of the light-transmitting surface 24c and the second reflective surface 24d correspond to the top and bottom surfaces of the trapezoid, respectively.

[0067] refer to Figure 5 As shown, in some embodiments, the first reflective surface 24a is connected to the surface of the second prism 242 facing the first adhesive surface 241a, and the surface of the third prism 243 facing the second adhesive surface 241b is connected to the third reflective surface 24b. Therefore, both the second prism 242 and the third prism 243 can be approximately triangular in shape. (Reference) Figure 6 As shown, in some other embodiments, the first reflective surface 24a and the surface of the second prism 242 facing the first adhesive surface 241a are spaced apart, a portion of the second reflective surface 24d is connected to the first reflective surface 24a and the surface of the second prism 242 facing the first adhesive surface 241a, the surface of the third prism 243 facing the second adhesive surface 241b is spaced apart from the third reflective surface 24b, and a portion of the second reflective surface 24d is connected to the surface of the third prism 243 facing the second adhesive surface 241b and the third reflective surface 24b. In this case, the second prism 242 and the third prism 243 can be approximately in the shape of a trapezoidal prism with a cross-section.

[0068] It should be noted that in embodiments where the optical transmission element 24 includes a first prism 241, a second prism 242, and a third prism 243, the impurity removal structure 25 can also be other structures. For example, combined with... Figure 7As shown, the stray light elimination structure 25 includes a light-shielding plate 253. The light-shielding plate 253 is inserted into the first adhesive surface 241a and / or the second adhesive surface 241b. The center of the light-shielding plate 253 is hollowed out to form an air layer 254. The air layer 254 is used to perform total internal reflection on at least a portion of the stray light, so that at least a portion of the stray light exits the optical transmission element 24 from the second reflective surface 24d. In this embodiment, normal imaging light can pass through the air layer 254 to reach the image acquisition module 23 for imaging. However, because the incident angle of stray light is larger than that of normal imaging light, it is more likely to exceed the critical angle of total internal reflection. Therefore, when the stray light passes through the air layer 254, it undergoes total internal reflection and cannot enter the image acquisition module 23, thereby reducing the interference of stray light on imaging and reducing the probability of glare.

[0069] Combination Figure 7 and Figure 8 As shown, it can be understood that an air layer 254 is formed between the second prism 242 and the first prism 241, and between the first prism 241 and the third prism 243. The refractive index of the air layer 254 is close to 1, and there is a greater difference in refractive index between it and the second prism 242 and the first prism 241. This can effectively reduce the critical angle of total internal reflection of stray light on the surface of the second prism 242 facing the first cemented surface 241a and on the second cemented surface 241b, thereby increasing the probability of total internal reflection of stray light and further improving the effect of stray light reduction.

[0070] Combination Figure 9 As shown, in some embodiments, the optical transmission element 24 is a one-piece prism structure. It should be noted that the impurity-removing structure 25 can be formed by a special structural design of the optical transmission element 24. For example, when the optical transmission element 24 is a one-piece prism structure, the prism structure has a first groove C1, a second groove C2, and a third groove C3 arranged parallel to each other at intervals. The impurity-removing structure 25 includes a light-blocking element 255 or a light-absorbing element disposed within the first groove C1, the second groove C2, and the third groove C3. Thus, the impurity-removing structure 25 can be obtained simply by slotting the relevant positions of the optical transmission element 24 and appropriately setting light-blocking or light-absorbing elements. This structure is simple to manufacture, improves manufacturing efficiency, and reduces manufacturing costs.

[0071] Continue reading Figure 9As shown, the first groove C1 and the third groove C3 both penetrate the second reflective surface 24d and are located at both ends of the second reflective surface 24d, respectively. The second groove C2 penetrates the light-transmitting surface 24c and is located in the middle of the light-transmitting surface 24c. The depth directions of the first groove C1, the second groove C2, and the third groove C3 are all perpendicular to the light-transmitting surface 24c, and their length directions are all parallel to the longitudinal section of the prism. The longitudinal section of the prism structure is the plane determined by the optical axis of the lens 22 and the optical axis of the image acquisition module 23. In this embodiment, by using the light-blocking element 255 or the light-absorbing element in the first groove C1, the second groove C2, and the third groove C3 of the optical transmission element 24 to block or absorb stray light, the probability of stray light entering the image acquisition module 23 is reduced, thereby improving the glare phenomenon.

[0072] It should be noted that the light-blocking component 255 or the light-absorbing component can be formed by ink coated on the first groove C1, the second groove C2 and the third groove C3. This processing method is simple, makes it easy to manufacture qualified impurity-removing structures 25, improves yield and reduces costs.

[0073] The light-transmitting surface 24c has a first light-transmitting area 24f and a second light-transmitting area 24g. The first light-transmitting area 24f is opposite to the lens 22, and the second light-transmitting area 24g is opposite to the image acquisition module 23. The first light-transmitting area 24f and / or the second light-transmitting area 24g are provided with an anti-reflection coating 246, thereby improving the transmittance of light collected by the lens 22 into the optical transmission element 24 and the transmittance of light emitted from the optical transmission element 24 to the image acquisition module 23, so as to improve the imaging quality.

[0074] In some embodiments, the first reflective surface 24a is a total internal reflection surface. Specifically, the incident angle of the light reflected from the first reflective surface 24a to the light-transmitting surface 24c is greater than or equal to the critical angle, so that total internal reflection occurs at the light-transmitting surface 24c, thereby allowing more normal imaging light to enter the image acquisition module 23. Correspondingly, the incident angle of the light reflected from the light-transmitting surface 24c to the second reflective surface 24d is greater than or equal to the critical angle, so that total internal reflection occurs at the second reflective surface 24d, thereby allowing more normal imaging light to enter the image acquisition module 23 to improve image quality.

[0075] The first reflective surface 24a and / or the third reflective surface 24b are provided with a reflective film FR, thereby increasing the reflectivity of light and allowing more normal imaging light to enter the image acquisition module 23, thus improving image quality. The reflective film FR can be an anti-reflective film, used to increase the reflectivity of the corresponding reflective surface of the optical transmission element 24, in order to improve the imaging quality of the camera module 20.

[0076] It should be noted that the surface area of ​​the light-transmitting element, excluding the effective imaging light, can be shielded to further reduce glare. Shielding methods include, but are not limited to, screen printing shielding ink or depositing a light-absorbing film. For example, at least one of the first reflective surface 24a and the third reflective surface 24b may have a light-absorbing material layer 249 attached around the reflective film FR; the light-absorbing material layer 249 is used to absorb stray light.

[0077] To facilitate understanding, the camera module 20 will be further explained below using the example of both the first reflective surface 24a and the third reflective surface 24b being provided with light-absorbing material layers 249.

[0078] Continue to combine Figure 10 As shown, the light-absorbing material layer 249 disposed on the first reflective surface 24a is referred to as the "first light-absorbing element 244", and the light-absorbing material layer 249 disposed on the third reflective surface 24b is referred to as the "second light-absorbing element 245". The first light-absorbing element 244 is annular and encloses and defines a first reflective area on the first reflective surface 24a. The second light-absorbing element 245 is annular and encloses and defines a second reflective area on the third reflective surface 24b. In this way, while the first light-absorbing element 244 and the second light-absorbing element 245 absorb stray light, the first reflective area and the second reflective area can still meet the requirements for light reflection.

[0079] The first light-absorbing element 244 and the second light-absorbing element 245 can be formed on the optical transmission element 24 by screen printing or spin coating ink, or they can be formed on the optical transmission element 24 by coating. No limitation is made here.

[0080] In embodiments where a reflective film FR is provided on the first reflective surface 24a and / or the third reflective surface 24b, the reflective film FR on the first reflective surface 24a covers the first reflective area, and the reflective film FR on the second reflective surface 24d covers the second reflective area. In this way, the reflective film FR in the corresponding reflective area can increase the reflectivity of light, and the first light-absorbing element 244 or the second light-absorbing element 245 around the corresponding reflective film FR can absorb stray light. This facilitates increasing the amount of normal imaging light entering the image acquisition module 23 while reducing the probability of stray light entering the image acquisition module 23, thereby improving image quality.

[0081] refer to Figure 11As shown, in some embodiments, the first aperture 251 surrounds the edge of the first adhesive surface 241a and is joined end to end. For example, the first aperture 251 is a U-shaped structure set along the edge of the first adhesive surface 241a and surrounding the adhesive 248 or air layer 254. The second aperture 252 surrounds the second adhesive surface 241b and is joined end to end. For example, the second aperture 252 is a U-shaped structure set along the edge of the second adhesive surface 241b and surrounding the adhesive 248 or air layer 254. This facilitates the adaptation of the transmission position of the imaging light between the second prism 242 and the first prism 241, and between the first prism 241 and the third prism 243. It is less likely to affect the transmission of the imaging light, and at the same time, it is beneficial for the first aperture 251 and the second aperture 252 to absorb stray light with different transmission positions than the imaging light, further improving the stray light reduction effect.

[0082] Combination Figure 12 , Figure 13 and Figure 14 As shown, when the first reflective surface 24a and the third reflective surface 24b are provided with a reflective film FR and a light-absorbing material layer 249, the reflective film FR on the first reflective surface 24a is connected to the edge of the first reflective surface 24a near the light-transmitting surface 24c, and the light-absorbing material layer 249 on the first reflective surface 24a avoids the reflective film FR from approaching the edge of the light-transmitting surface 24c, for example, it is a U-shaped structure that surrounds part of the reflective film FR and opens towards the light-transmitting surface 24c. The light-absorbing material layer 249 on the third reflective surface 24b surrounds the reflective film FR and is connected end to end, for example, it is a U-shaped structure that surrounds the reflective film FR. Therefore, the incident position of the imaging light on the first reflective surface 24a and the third reflective surface 24b can be adapted to achieve sufficient transmission of the imaging light, and the coverage area of ​​the light-absorbing material layer 249 on the first reflective surface 24a and the third reflective surface 24b can be significantly increased without affecting the transmission of the imaging light, thereby improving the absorption effect of stray light.

[0083] In some embodiments, a reflective film FR may also be provided on the second reflective surface 24d, and a light-absorbing material layer 249 may also be provided on the second reflective surface 24d surrounding the reflective film FR. The types of the reflective film FR and the light-absorbing material layer 249 on the second reflective surface 24d may be the same as those on the first reflective surface 24a. Providing the reflective film FR and the light-absorbing material layer 249 on the second reflective surface 24d, and designing the layout of the reflective film FR and the light-absorbing material layer 249, is beneficial to improving the reflectivity of imaging light on the second reflective surface 24d, improving light utilization efficiency, and also beneficial to absorbing stray light other than imaging light incident on the second reflective surface 24d, improving the stray light reduction effect, thereby improving the imaging quality of the camera module 20.

[0084] Combination Figure 15As shown, in some embodiments, the antireflective coating 246 disposed in the first light-transmitting area 24f is opposite to the lens 22, and the antireflective coating 246 disposed in the second light-transmitting area 24g is opposite to the image acquisition module 23, so as to improve the transmittance of imaging light on the light-transmitting surface 24c, improve the light utilization efficiency, and thereby improve the imaging brightness and imaging quality of the camera module 20. In some embodiments, the first light-transmitting area 24f and the second light-transmitting area 24g are further provided with a light-absorbing material layer 249. The antireflective coating 246 disposed in the first light-transmitting area 24f is connected to the edge of the first light-transmitting area 24f near the first reflective surface 24a. The light-absorbing material layer 249 disposed in the first light-transmitting area 24f surrounds a portion of the antireflective coating 246 and avoids the antireflective coating 246 from approaching the edge of the first reflective surface 24a, for example, a U-shaped structure with the opening facing the first reflective surface 24a. The light-absorbing material layer 249 disposed in the second light-transmitting area 24g surrounds the anti-reflection film 246 and is connected end to end, for example, in a U-shaped structure surrounding the anti-reflection film 246. The light-absorbing material layer 249 disposed in the first light-transmitting area 24f and the light-absorbing material layer 249 disposed in the second light-transmitting area 24g can be interconnected. Thus, the light-absorbing material layer 249 can adapt to the incident position of the imaging light on the light-transmitting surface 24c, which not only does not easily affect the transmission of the imaging light, but also increases the coverage area of ​​the light-absorbing material layer 249 on the light-transmitting surface 24c, effectively absorbing stray light other than the imaging light, improving the stray light reduction effect, and thereby improving the imaging quality of the camera module 20.

[0085] In some embodiments, the lens 22 includes a fixed lens group 221 and a movable lens group 222 arranged coaxially. Since the fixed lens group 221 and the movable lens group 222 are coaxially arranged, the optical axes of the fixed lens group 221 and the movable lens group 222 coincide, and these optical axes are also the optical axis of the lens 22. The movable lens group 222 is located between the fixed lens group 221 and the optical transmission element 24 along the optical axis of the lens 22. The camera module 20 also includes a first driving assembly for driving the movable lens group 222 to move relative to the fixed lens group 221 along the optical axis for focusing.

[0086] In some embodiments, the optical transmission element 24 includes a refractive section 24e located on the optical path from the light collected by the lens 22 to the image acquisition module 23, and used to refract the light passing through the refractive section 24e. The refractive section 24e coordinates the focusing effect generated when the movable lens group 222 moves relative to the fixed lens along the optical axis, thereby reducing the number of lenses 22a in the movable lens group 222. This reduces the load on the movable lens group 222 from the first drive assembly, allowing for a smaller first drive assembly to meet zoom requirements, thus contributing to the overall miniaturization of the camera module 20. It should be noted that the movable lens group 222 may include one or more lenses 22a with optical power. The fixed lens group 221 has more lenses 22a than the movable lens group 222, thereby reducing the motion load on the movable lens group 222.

[0087] The refractive portion 24e can either focus or diffuse light. For example, the light-transmitting surface 24c has a convex spherical surface, at which the refractive portion 24e is formed, thus focusing the light passing through it. In some embodiments, the light-transmitting surface 24c has a concave spherical surface, at which the refractive portion 24e is formed, thus diffuses the light passing through it.

[0088] In some embodiments, the camera module 20 further includes a second drive assembly for driving the movable lens group 222 to move relative to the fixed lens group 221 along a direction perpendicular to the optical axis or to deflect it about a direction perpendicular to the optical axis for image stabilization. It should be noted that because high-magnification telephoto lenses have a large EFL (Effective Focal Length), achieving the same close-up shooting and image stabilization effect requires a large focusing distance and image stabilization distance (both are proportional to the focal length). This design reduces the focusing distance and image stabilization distance of the camera module 20 compared to moving the entire lens 22 to achieve focusing and image stabilization. The camera module 20 using the embodiments of this application reduces the focusing distance by 50% to 80% and the image stabilization distance by 1 / 3 to 1 / 2 compared to conventional lens movement schemes.

[0089] In some embodiments, the camera module 20 satisfies the condition: 2≤EFL1 / EFL2≤5, where EFL1 is the effective focal length of the movable lens group 222 and EFL2 is the total effective focal length of the fixed lens group 221 and the movable lens group 222.

[0090] It should be noted that, in addition to image stabilization on the lens 22 side, image stabilization can also be performed on the image acquisition module 23 side.

[0091] Combination Figure 16As shown, in some embodiments, the image acquisition module 23 includes a mounting base 23a, a circuit board 231, an image sensor 232, and an image stabilization module (OIS). The mounting base 23a is fixed to the optical transmission element 24. The image sensor 232 has a photosensitive surface, and the side of the image sensor 232 facing away from the photosensitive surface is attached to and electrically connected to the circuit board 231. The image stabilization module (OIS) is disposed within the mounting base 23a and is used to move the image sensor 232 in a translational motion on the side where the light-transmitting surface 24c is located, thereby adjusting the projection area of ​​the photosensitive surface on the third reflective surface 24b along the axial direction of the image sensor 232 to achieve image stabilization. In this embodiment, image stabilization is achieved by moving the image sensor 232 within the image acquisition module 23 based on the image stabilization module (OIS), thus eliminating the need for image stabilization on the lens 22 side, thereby achieving miniaturization.

[0092] The image stabilization module (OIS) includes a flexible support plate 201, a magnet 202, and a coil 203. The flexible support plate 201 includes a connecting portion 201a and a floating portion 201b. The connecting portion 201a is fixed to the mounting base 23a, and the side of the circuit board 231 facing away from the image sensor 232 is fixed to the floating portion 201b. The floating portion 201b is elastically connected to the connecting portion 201a, which can be achieved through an elastic element 201c such as a spring or sheet spring, allowing the floating portion 201b to float relative to the connecting portion 201a when subjected to external force. The flexible support plate 201 itself is made of a material capable of elastic deformation. For example, the flexible support plate 201 can be a steel sheet with perforations. The elastic modulus of the steel sheet at the corresponding perforated position is less than the elastic modulus at the unperforated position. Therefore, the perforation allows the flexible support plate 201 to have the connecting portion 201a and the floating portion 201b elastically connected to each other.

[0093] Magnet 202 and coil 203 are arranged opposite each other. When coil 203 is energized, coil 203 and magnet 202 generate a magnetic force to drive image sensor 232 to translate relative to mounting base 23a within the plane of photosensitive surface. During the translation of image sensor 232 relative to mounting base 23a, floating part 201b is displaced relative to connecting part 201a. When the magnetic force is eliminated, floating part 201b returns to its initial position relative to connecting part 201a, allowing image sensor 232 to return to its initial position before the OIS (Optical Image Stabilization) module operates. In this embodiment, the OIS module drives the translation of image sensor 232 to adjust its position relative to mounting base 23a, thereby compensating for shake during the shooting process of camera module 20, achieving image stabilization, and improving image clarity.

[0094] The placement of the magnet 202 and the coil 203 should be sufficient to enable the image sensor 232 to translate relative to the mounting base 23a for optical image stabilization. For example, one of the magnet 202 and the coil 203 may be located on the mounting base 23a or the connecting part 201a, while the other may be located on the floating part 201b or the circuit board 231.

[0095] In the camera module 20, one or more sets of magnets 202 and coils 203 are arranged on each of the four sides corresponding to the image sensor 232, so that the image sensor 232 can translate in any direction in the two-dimensional space of the plane where its photosensitive surface is located.

[0096] Image sensor 232 includes, but is not limited to, charge-coupled device (CCD) or complementary metal-oxide-semiconductor sensor (CMOSSensor).

[0097] It should be noted that, in combination Figure 2 As shown, in some embodiments, the camera module 20 includes a base 20a, which serves as a carrier for mounting an optical transmission element 24. The optical transmission element 24 mounted on the base 20a is used to reflect light, so that the light captured by the lens 22 can be transmitted to the image acquisition module 23.

[0098] Combination Figure 2 and Figure 16 As shown, the mounting base 23a of the image acquisition module 23 is fixed to the base 20a. The mounting base 23a and the base 20a can be connected by a snap-fit ​​or by adhesive, which is not limited here.

[0099] In some embodiments, the camera module 20 further includes a filter element 26, which is used to filter out interfering light and prevent interfering light from hitting the image sensor 232 and affecting normal imaging. In one embodiment, the filter element 26 can be an infrared cutoff filter.

[0100] Furthermore, a support base 23b is provided within the mounting base 23a, and the support base 23b is connected to the circuit board 231. The filter element 26 is connected to the support base 23b and is located between the image sensor 232 and the optical transmission element 24. In this way, by utilizing the stacking of the filter element 26 in the thickness direction of the image sensor 232, the height difference between the lens 22 and the mounting base 23a is reduced, so that the height difference between the lens 22 and the mounting base 23a is not too large, which is conducive to the thin and light design of the electronic device 10. At the same time, it also avoids the decorative part 12 from being too obtrusive on the back of the housing 11, so as to maintain the overall aesthetic appearance of the electronic device 10.

[0101] Please see again. Figure 5 As shown, in some embodiments, chamfers 247 may be provided at the junction of the light-transmitting surface 24c and the first reflective surface 24a, and at the junction of the light-transmitting surface 24c and the third reflective surface 24b. The chamfers 247 may be approximately perpendicular to the optical axis of the lens 22. For example, the chamfers 247 can be formed by cutting the opposite ends of the optical transmission element 24 corresponding to the light-transmitting surface 24c. Since the two chamfers 247 are located at the outermost parts of the two ends of the optical transmission element 24 in the length direction, providing chamfers 247 can avoid the risk of the optical transmission element 24 forming two sharp points at both ends in the length direction, which could easily collide with other components and cause chipping. It also helps to reduce the length of the optical transmission element 24.

[0102] Furthermore, in some embodiments, the optical transmission element 24 may also include a light-absorbing element or a light-blocking element 255 disposed at the chamfer 247. The light-absorbing element or the light-blocking element 255 can absorb or block stray light incident on the chamfer 247. The light-absorbing element or the light-blocking element 255 may be formed by ink coated on the chamfer 247, or by a screen-printed structure or dielectric film layer disposed at the chamfer 247. It is understood that the setting of the chamfer 247 can easily change the reflection direction of stray light after it is incident on the chamfer 247, making it easier for stray light to be transmitted by the optical transmission element 24 and incident on the image acquisition module 23. The light-absorbing element or the light-blocking element 255 disposed at the chamfer 247 can compensate for the influence of the chamfer 247 on the reflection of stray light, effectively suppress stray light by absorbing or blocking stray light, and improve the imaging quality of the camera module 20.

[0103] refer to Figure 17 , Figure 17 This is a schematic diagram of the structure of an electronic device 10 provided in an embodiment of this application. The electronic device 10 may include a radio frequency (RF) circuit 501, a memory 502 including one or more computer-readable storage media, an input unit 503, a display unit 504, a sensor 505, an audio circuit 506, a wireless Fidelity (WiFi) module 507, a processor 508 including one or more processing cores, and a power supply 509, among other components. Those skilled in the art will understand that... Figure 17 The structure of the electronic device 10 shown does not constitute a limitation on the electronic device 10. It may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0104] The radio frequency (RF) circuit 501 can be used to send and receive information, or to receive and send signals during a call. Specifically, it receives downlink information from the base station and hands it over to one or more processors 508 for processing; additionally, it sends uplink data to the base station. Typically, the RF circuit 501 includes, but is not limited to, an antenna, at least one amplifier, a tuner, one or more oscillators, a Subscriber Identity Module (SIM) card, a transceiver, a coupler, a low-noise amplifier (LNA), a duplexer, etc. Furthermore, the RF circuit 501 can also communicate wirelessly with networks and other devices. This wireless communication can use any communication standard or protocol, including but not limited to GSM, GPRS, CDMA, WCDMA, LTE, email, and SMS.

[0105] Memory 502 can be used to store applications and data. The applications stored in memory 502 contain executable code. Applications can be composed of various functional modules. Processor 508 executes various functional applications and data processing by running the applications stored in memory 502. Memory 502 may primarily include a program storage area and a data storage area. The program storage area may store the operating system, applications required for at least one function (such as sound playback, image playback, etc.), etc.; the data storage area may store data created based on the use of electronic device 10 (such as audio data, phonebook, etc.). Furthermore, memory 502 may include high-speed random access memory and may also include non-volatile memory, such as at least one disk storage device, flash memory device, or other volatile solid-state storage device. Accordingly, memory 502 may also include a memory controller to provide access to memory 502 for processor 508 and input unit 503.

[0106] Input unit 503 can be used to receive input numbers, character information, or user characteristic information (such as fingerprints), and to generate keyboard, mouse, joystick, optical, or trackball signal inputs related to user settings and function control. Specifically, in one embodiment, input unit 503 may include a touch-sensitive surface and other input devices. The touch-sensitive surface, also known as a touch display or touchpad, can collect user touch operations on or near it (such as user operations using fingers, styluses, or any suitable object or accessory on or near the touch-sensitive surface) and drive corresponding connection devices according to a pre-set program. Optionally, the touch-sensitive surface may include a touch detection device and a touch controller. The touch detection device detects the user's touch orientation and the signal generated by the touch operation, transmitting the signal to the touch controller; the touch controller receives touch information from the touch detection device, converts it into touch point coordinates, sends it to the processor 508, and can receive and execute commands from the processor 508.

[0107] Display unit 504 can be used to display information input by the user or information provided to the user, as well as various graphical user interfaces of electronic device 10. These graphical user interfaces can be composed of graphics, text, icons, video, and any combination thereof. Display unit 504 may include a display panel. Optionally, the display panel can be configured in the form of a liquid crystal display (LCD), organic light-emitting diode (OLED), etc. Further, a touch-sensitive surface can cover the display panel. When the touch-sensitive surface detects a touch operation on or near it, it transmits the information to processor 508 to determine the type of touch event. Subsequently, processor 508 provides corresponding visual output on the display panel according to the type of touch event. Although in Figure 17 In this embodiment, the touch-sensitive surface and the display panel are two separate components for implementing input and output functions. However, in some embodiments, the touch-sensitive surface and the display panel can be integrated to achieve both input and output functions. It is understood that the display screen may include an input unit 503 and a display unit 504.

[0108] The electronic device 10 may also include at least one sensor 505, such as a light sensor, a motion sensor, and other sensors. Specifically, the light sensor may include an ambient light sensor and a proximity sensor. The ambient light sensor can adjust the brightness of the display panel according to the ambient light level, and the proximity sensor can turn off the display panel and / or backlight when the electronic device 10 is moved to the ear. As a type of motion sensor, a gravity acceleration sensor can detect the magnitude of acceleration in various directions (generally three axes). When stationary, it can detect the magnitude and direction of gravity and can be used for applications that recognize the phone's posture (such as landscape / portrait switching, related games, magnetometer posture calibration), vibration recognition related functions (such as pedometer, tapping), etc. Other sensors that may be configured in the electronic device 10, such as gyroscopes, barometers, hygrometers, thermometers, and infrared sensors, will not be described in detail here.

[0109] Audio circuit 506 provides an audio interface between the user and electronic device 10 via a speaker and microphone. Audio circuit 506 converts received audio data into electrical signals, transmits them to the speaker, and the speaker outputs them as sound signals. Conversely, the microphone converts collected sound signals into electrical signals, which are then received by audio circuit 506, converted back into audio data, and processed by processor 508. The audio data is then transmitted via radio frequency circuit 501 to, for example, another electronic device 10, or output to memory 502 for further processing. Audio circuit 506 may also include a headphone jack to facilitate communication between peripheral headphones and electronic device 10.

[0110] WiFi (Wireless Fidelity) is a short-range wireless transmission technology. Electronic device 10, through WiFi module 507, can help users send and receive emails, browse web pages, and access streaming media, providing users with wireless broadband internet access. Although Figure 17 The wireless fidelity module 507 is shown, but it is understood that it is not a necessary component of the electronic device 10 and can be omitted as needed without changing the nature of the invention.

[0111] The processor 508 is the control center of the electronic device 10. It connects various parts of the electronic device 10 via various interfaces and lines. By running or executing applications stored in the memory 502 and calling data stored in the memory 502, it performs various functions and processes data of the electronic device 10, thereby providing overall monitoring of the electronic device 10. Optionally, the processor 508 may include one or more processing cores; preferably, the processor 508 may integrate an application processor and a modem processor, wherein the application processor mainly handles the operating system, user interface, and applications, while the modem processor mainly handles wireless communication. It is understood that the modem processor may not be integrated into the processor 508.

[0112] The electronic device 10 also includes a power supply 509 that supplies power to the various components. Preferably, the power supply 509 can be logically connected to the processor 508 through a power management system, thereby enabling functions such as charging, discharging, and power consumption management through the power management system. The power supply 509 may also include one or more DC or AC power supplies, recharging systems, power fault detection circuits, power converters or inverters, power status indicators, and other arbitrary components.

[0113] although Figure 17 As not shown in the diagram, the electronic device 10 may also include a Bluetooth module, etc., which will not be described in detail here. In specific implementation, the above modules can be implemented as independent entities, or they can be arbitrarily combined and implemented as the same or several entities. For the specific implementation of the above modules, please refer to the previous method embodiments, which will not be described in detail here.

[0114] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0115] The above embodiments merely illustrate several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A camera module, characterized in that, include: Lens; An image acquisition module is spaced apart from the lens, and the optical axis of the image acquisition module is parallel to the optical axis of the lens; An optical transmission element includes a light-transmitting surface, a first reflective surface, a second reflective surface, and a third reflective surface. The light-transmitting surface is perpendicular to the optical axis of the lens, and the second reflective surface is parallel to the light-transmitting surface. The lens and the image acquisition module are both located on the side of the second reflective surface facing away from the light-transmitting surface. The first reflective surface and the third reflective surface are both located between the light-transmitting surface and the second reflective surface, and are inclined outward relative to the second reflective surface. The optical transmission element is configured such that light collected by the lens can enter the optical transmission element from the light-transmitting surface and be reflected sequentially through the first reflective surface, the light-transmitting surface, the second reflective surface, the light-transmitting surface, and the third reflective surface to the image acquisition module. The optical transmission element includes a first prism, a second prism, and a third prism. The first prism includes a first adhesive surface and a second adhesive surface that are inclined inward relative to the second reflective surface. The second prism is connected to the first adhesive surface, and the third prism is connected to the second adhesive surface.

2. The camera module of claim 1, wherein, An air layer is provided between the first adhesive surface and the second adhesive surface, and / or between the second adhesive surface and the third prism, the air layer being used for total internal reflection of at least a portion of stray light.

3. The camera module according to claim 2, characterized in that, The first adhesive surface and the second prism are filled with glue, the second adhesive surface and the third prism are glued together, and an air layer is provided. The air layer is used to perform total internal reflection of at least part of the stray light, so that at least part of the stray light is emitted from the second reflective surface of the optical transmission element.

4. The camera module of claim 3, wherein, The optical transmission element satisfies the following condition: n1 / n2 ≥ 1.22; 1.6≤n1≤2.2； 1.3≤n2≤1.6； Wherein, n1 is the refractive index of the first prism and the second prism, and n2 is the refractive index of the glue between the first prism and the second prism.

5. The camera module of claim 3, wherein, The camera module includes a first aperture and a second aperture. The first aperture is disposed on the first adhesive surface and is arranged around the adhesive between the first adhesive surface and the second prism. The second aperture is disposed on the second adhesive surface and is arranged around the air layer between the second adhesive surface and the third prism.

6. The camera module according to claim 1, characterized in that, It also includes a stray light elimination structure, which is disposed in the optical path between the first reflective surface and the third reflective surface of the optical transmission element. The stray light elimination structure is used to eliminate stray light in the light reflected by at least one of the first reflective surface, the second reflective surface and the light-transmitting surface.

7. The camera module according to claim 6, characterized in that, The impurity removal structure includes a light-shielding sheet, with the light-shielding sheet inserted into the first adhesive surface and / or the second adhesive surface, and the center of the light-shielding sheet is hollowed out to form an air layer.

8. The camera module according to claim 6, characterized in that, The impurity elimination structure includes a first light barrier, which is disposed on the first adhesive surface and is used to eliminate stray light in the light reflected from the first reflective surface through the light-transmitting surface; the impurity elimination structure includes a second light barrier, which is disposed on the second adhesive surface and is used to eliminate stray light in the light reflected from the second reflective surface.

9. The camera module according to claim 8, characterized in that, The first light barrier surrounds the edge of the first adhesive surface and is joined end to end, and the second light barrier surrounds the edge of the second adhesive surface and is joined end to end.

10. The camera module according to claim 1, characterized in that, Both the first reflective surface and the third reflective surface are connected between the light-transmitting surface and the second reflective surface, and the first reflective surface and the third reflective surface are inclined relative to the light-transmitting surface towards the second reflective surface. The first reflective surface is opposite to the lens along the optical axis of the lens, and the third reflective surface is opposite to the image acquisition module along the optical axis of the image acquisition module.

11. The camera module according to claim 1, characterized in that, The second prism is glued to the first adhesive surface, and the third prism is glued to the second adhesive surface. The absolute value of the difference between the refractive index of the glue and the refractive index of the material used in the optical transmission element is less than or equal to 0.

05.

12. The camera module of claim 1, wherein, The angle between the first adhesive surface and the light-transmitting surface, and the acute angle between the second adhesive surface and the light-transmitting surface, are 30°-45°.

13. The camera module according to claim 1, characterized in that, The distance between the surface of the second prism facing the first adhesive surface and the first adhesive surface, and the distance between the surface of the third prism facing the second adhesive surface and the second adhesive surface, are 1.5um-15um.

14. The camera module of claim 1, wherein, The first adhesive surface is connected to the second adhesive surface.

15. The camera module of claim 1, wherein, The first adhesive surface and the second adhesive surface are spaced apart, and a portion of the light-transmitting surface is connected to the first adhesive surface and the second adhesive surface.

16. The camera module of claim 1, wherein, The first reflective surface and the second prism are connected to the surface of the first adhesive surface, and the surface of the third prism facing the second adhesive surface is connected to the third reflective surface.

17. The camera module of claim 1, wherein, The first reflective surface is spaced apart from the surface of the second prism facing the first adhesive surface, the surface of the third prism facing the second adhesive surface is spaced apart from the third reflective surface, a portion of the second reflective surface is connected to the first reflective surface and the surface of the second prism facing the first adhesive surface, and another portion of the second reflective surface is connected to the surface of the third prism facing the second adhesive surface and the third reflective surface.

18. The camera module of claim 1, wherein, The light-transmitting surface has a first light-transmitting area and a second light-transmitting area. The first light-transmitting area is opposite to the lens, and the second light-transmitting area is opposite to the image acquisition module. Anti-reflection coatings are provided on the first light-transmitting area and the second light-transmitting area.

19. The camera module according to claim 18, characterized in that, The first light-transmitting area and the second light-transmitting area are further provided with light-absorbing material layers. The anti-reflective film in the first light-transmitting area is connected to the edge of the first light-transmitting area near the first reflective surface. The light-absorbing material layer in the first light-transmitting area is disposed around a portion of the anti-reflective film and avoids the edge of the anti-reflective film near the first reflective surface. The light-absorbing material layer in the second light-transmitting area surrounds the anti-reflective film and is connected end to end.

20. The camera module according to claim 1, characterized in that, The first reflective surface is provided with a reflective film and a light-absorbing material layer. The light-absorbing material layer is used to absorb stray light. The reflective film is connected to the edge of the first reflective surface near the light-transmitting surface. The light-absorbing material layer surrounds a portion of the reflective film and avoids the reflective film from approaching the edge of the light-transmitting surface.

21. The camera module according to claim 1, characterized in that, The third reflective surface is provided with a reflective film and a light-absorbing material layer. The light-absorbing material layer is used to absorb stray light and surrounds the reflective film with the ends connected.

22. The camera module according to claim 1, characterized in that, The second reflective surface is provided with a reflective film, and the second reflective surface is also provided with a light-absorbing material layer surrounding the reflective film.

23. The camera module according to claim 1, characterized in that, The incident angle of the light reflected from the first reflective surface to the light-transmitting surface is greater than or equal to the critical angle of total internal reflection, so that total internal reflection occurs at the light-transmitting surface; the incident angle of the light reflected from the light-transmitting surface to the second reflective surface is greater than or equal to the critical angle of total internal reflection, so that total internal reflection occurs at the second reflective surface.

24. The camera module of claim 1, wherein, The angle between the first reflective surface and the light-transmitting surface, and the angle between the third reflective surface and the light-transmitting surface, are 20° to 35°.

25. The camera module of claim 1, wherein, The junction of the light-transmitting surface and the first reflective surface, as well as the junction of the light-transmitting surface and the third reflective surface, are provided with chamfers.

26. The camera module according to claim 25, characterized in that, The optical transmission element also includes a light-absorbing element or a light-blocking element with the chamfered corner.

27. The camera module of claim 1, wherein, The lens includes a fixed lens group and a movable lens group arranged on the same optical axis. The movable lens group is located between the fixed lens group and the optical transmission element along the optical axis of the lens. The camera module also includes a first driving component, which is used to drive the movable lens group to move relative to the fixed lens group along the optical axis for focusing.

28. The camera module according to claim 27, characterized in that, The camera module further includes a second driving component, which is used to drive the movable lens group to move relative to the fixed lens group along a direction perpendicular to the optical axis or to deflect around a direction perpendicular to the optical axis for image stabilization.

29. The camera module according to claim 27, characterized in that, The image acquisition module includes a mounting base, a circuit board, an image sensor, and an image stabilization module. The mounting base is fixed to the optical transmission element. The image sensor has a photosensitive surface, and the side of the image sensor facing away from the photosensitive surface is attached to the circuit board and electrically connected to the circuit board. The image stabilization module is disposed in the mounting base and is used to drive the image sensor to translate along the side where the light-transmitting surface is located, so as to adjust the projection area of ​​the photosensitive surface on the third reflective surface along the axial direction of the image sensor to achieve image stabilization.

30. An electronic device, characterized in that, Includes the camera module as described in any one of claims 1-29.

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