Lens assembly, control method, camera module and electronic equipment

Abstract

The embodiment of the present application provides a lens assembly, a control method, a camera module and an electronic device, wherein the lens assembly includes a first lens unit, a second lens unit and a reflector, wherein the second lens unit is located on the object side of the first lens unit and is relatively fixed to the position of the first lens unit, and the optical axis of the second lens unit and the optical axis of the first lens unit are located in different directions. The reflector is located at the junction of the exit pupil of the first lens unit and the entrance pupil of the second lens unit, and is configured to rotate relative to the second lens unit when the field of view angle range of the second lens unit is offset relative to the target area, so that the field of view angle range of the second lens unit matches the target area. The lens assembly of the present application can not only realize the anti-shake function of the lens assembly, the camera module and the electronic device, but also can maximize the resolution of the captured image, ensure the edge quality of the picture, and improve the shooting quality.

Description

Technical Field

[0001] The present application relates to the field of electronic technology, and in particular to a camera module, a control method, a camera device and an electronic device. Background Art

[0002] In recent years, with the continuous development and widespread application of camera modules, people's pursuit of the experience of electronic devices has become more and more extreme, including the pursuit of the shooting quality of camera modules in electronic devices.

[0003] When people hold electronic devices to shoot, it is inevitable that the body will shake, which may cause the sensor in the camera module to receive different light at the same position and superimpose them, resulting in blurred final image. Especially when shooting video, the body shake will reduce the continuous stability of the video picture, and even make it impossible to see the video content clearly. The images taken by the telephoto camera module in the electronic device are most obviously affected by the body shake. The anti-shake method of electronic devices in related technologies is mainly through the optical image stabilization (Optical Image Stabilizer, OIS) of the lens or the sensor displacement optical image stabilization to achieve the anti-shake function of the electronic device and improve the shooting quality. Optical image stabilization is referred to as OIS optical image stabilization.

[0004] However, although the OIS optical image stabilization of the lens or the sensor-shift optical image stabilization can realize the anti-shake function of the electronic device, it will reduce the edge quality of the picture and affect the video quality. Summary of the invention

[0005] The present application provides a lens assembly, a control method, a camera module and an electronic device, which can not only realize the anti-shake function of the lens assembly, the camera module and the electronic device, but also maximize the resolution of the captured image, ensure the edge quality of the picture, and improve the shooting quality.

[0006] According to a first aspect of an embodiment of the present application, a lens assembly is provided, the lens assembly comprising a first lens unit, a second lens unit and a reflector, the second lens unit is located on the object side of the first lens unit and is relatively fixed to the position of the first lens unit, and the optical axis of the second lens unit and the optical axis of the first lens unit are located in different directions;

[0007] The reflector is located at the junction of the exit pupil of the first lens unit and the entrance pupil of the second lens unit, and is configured to rotate relative to the second lens unit when the field of view angle range of the second lens unit is offset relative to the target area, so as to match the field of view angle range of the second lens unit with the target area.

[0008] The present application arranges a first lens unit, a second lens unit and a reflector in a lens assembly. Since the second lens unit is located on the object side of the first lens unit and is relatively fixed in position to the first lens unit, the reflector is located at the junction of an exit pupil of the first lens unit and an entrance pupil of the second lens unit, so that the reflector can reflect the light beam emitted by the first lens unit to the second lens unit, thereby realizing the imaging function of the lens assembly and making the positions of the first lens unit and the second lens unit in the lens assembly relatively constant.

[0009] Furthermore, since the reflector is configured to rotate relative to the second lens unit to match the quasi-target area when the field angle range of the second lens unit is offset relative to the target area, when the lens assembly shakes, causing the field angle range of the first lens unit and the field angle range of the second lens unit to be offset relative to the target area, the reflector can be rotated relative to the second lens unit to ensure that the field angle range of the second lens unit matches the target area, and displacement compensation is performed on the image shake caused by the shaking of the first lens unit and the second lens unit, thereby realizing the anti-shake function of the lens assembly.

[0010] While realizing the anti-shake function of the lens assembly, since the positions of the first lens unit and the second lens unit relative to the image sensor in the camera module are relatively constant, the lens assembly of the present application can also maximize the resolution of the captured image, ensure the edge quality of the picture, and improve the shooting quality.

[0011] In some optional embodiments, the field of view angle range of the second lens unit is smaller than the field of view angle range of the first lens unit, and the field of view angle range of the second lens unit is located in the middle of the field of view angle range of the first lens unit, so that after the reflector rotates, it can be ensured that the field of view angle range of the second lens unit is still within the field of view angle range of the first lens unit, so that the field of view angle range of the second lens unit can match the target area.

[0012] In some optional embodiments, the reflector is configured to be able to rotate relative to the second lens unit around a central axis on its own mirror surface so that the field of view angle range of the second lens unit moves toward a first direction and matches the target area; wherein the first direction is opposite to the offset direction of the field of view angle range of the second lens unit.

[0013] In this way, by rotating the reflector around the central rotation axis on its own mirror surface relative to the second lens unit, the field angle range of the second lens unit can match the target area after the reflector is rotated.

[0014] In some optional embodiments, the central rotation axis includes a first rotation axis and a second rotation axis, and the first rotation axis and the second rotation axis are located in different directions of the reflector on its own mirror surface;

[0015] The offset direction includes at least one of a first offset direction and a second offset direction, the first rotation axis corresponds to one of the first offset direction and the second offset direction, and the second rotation axis corresponds to the other of the first offset direction and the second offset direction.

[0016] In this way, by setting the first rotation axis and the second rotation axis, when the field of view angle range of the second lens unit shifts toward at least one of the first offset direction and the second offset direction due to the shaking of the lens assembly, the reflector can rotate around the central rotation axis corresponding to the offset direction to ensure that the field of view angle range of the second lens unit matches the target area, thereby realizing the anti-shake function of the lens assembly and ensuring that the positions of the first lens unit and the second lens unit relative to the image sensor are relatively constant.

[0017] In some optional embodiments, the reflector is configured to rotate relative to the second lens unit at a first preset angle around a first rotation axis when the field of view angle range of the second lens unit shifts toward a first offset direction relative to the target area.

[0018] In this way, by rotating the reflector around the first rotation axis, the displacement of the field angle range of the second lens unit in the first offset direction can be compensated, which is conducive to matching the field angle range of the second lens unit with the target area in the first offset direction.

[0019] In some optional implementations, the first preset angle satisfies the condition:

[0020] α=Φ / 2

[0021] In the formula, α is the first preset angle, and Φ is the offset angle of the field of view angle range of the second lens unit relative to the target area in the first offset direction.

[0022] In this way, after the reflector is rotated about the first rotation axis relative to the second lens unit by the first preset angle, the viewing angle range of the second lens unit can match the target area in the first offset direction.

[0023] In some optional embodiments, the optical axis of the second lens unit and the optical axis of the first lens unit have an angle to facilitate the arrangement of the reflector.

[0024] In some optional embodiments, the reflector is further configured to rotate relative to the second lens unit about a second rotation axis at a second preset angle when the field of view angle range of the second lens unit shifts relative to the target area toward the second offset direction.

[0025] In this way, by rotating the reflector around the second rotation axis, the displacement of the field angle range of the second lens unit in the second offset direction can be compensated, which is conducive to matching the field angle range of the second lens unit with the target area in the second offset direction.

[0026] In some optional implementations, the second preset angle satisfies the condition:

[0027] β=Ψ / 2, where β is the second preset angle, and Ψ is the offset angle of the field angle range of the second lens unit relative to the target area in the second offset direction.

[0028] In this way, after the reflector is rotated about the second rotation axis relative to the second lens unit by the second preset angle, the viewing angle range of the second lens unit can match the target area in the second offset direction.

[0029] In some optional embodiments, the exit pupil of the first lens unit coincides with the entrance pupil of the second lens unit and is located at the center of the reflector to avoid the introduction of aberrations when the reflector rotates, thereby improving the shooting quality.

[0030] In some optional embodiments, the first lens unit includes at least one lens and is configured to compress the aperture of the incident light of the first lens unit to reduce the structural size of the reflector, facilitate the control of the reflector, enhance the reliability of the reflector rotation, and enable the lens assembly to have the characteristics of small size and light weight.

[0031] In some optional embodiments, the first lens unit includes a telephoto unit, the telephoto unit includes a first lens group and a second lens group, the first lens group and the second lens group include at least one lens; the first lens group is configured to converge incident light to the second lens group;

[0032] The second lens group is located on the object side of the first lens group and is configured to diffuse the incident light passing through the first lens group and then project it to the reflector in the form of a parallel beam.

[0033] In this way, by disposing the first lens group and the second lens group in the telephoto unit, not only the aperture of the incident light of the first lens unit can be compressed, but also the telephoto function of the lens assembly can be realized.

[0034] In some optional embodiments, the focal lengths of the first lens group and the second lens group are both positive focal lengths, and the convergence point of the first lens group is located on the object side of the second lens group, or,

[0035] The focal length of the first lens group is a positive focal length, the focal length of the second lens group is a negative focal length, and the convergence point of the first lens group is located on the image side of the second lens group.

[0036] In this way, by setting the focal lengths of the first lens group and the second lens group, the telephoto function of the telephoto unit is realized, the aperture of the incident light of the first lens unit is compressed, and the structure of the telephoto unit and the lens assembly can be made more diversified.

[0037] In some optional embodiments, the first lens unit further includes a prism, the prism is located on the object side of the first lens group, the prism includes a light incident surface, a reflection surface and a light emitting surface connected to each other, and the light emitting surface is arranged opposite to the first lens group;

[0038] The prism is configured to reflect the incident light from the light incident surface through the reflection surface and then emit the incident light from the light exit surface to the first lens group in the form of a parallel light beam.

[0039] In this way, through the setting of the prism, not only can more incident light be injected into the telephoto unit, while ensuring the telephoto function of the telephoto unit and the anti-shake function of the lens assembly to improve the shooting quality, but also the size of the lens assembly in the thickness direction of the electronic device can be compressed by deflecting the incident light on the reflection surface, which is conducive to reducing the thickness of the electronic device.

[0040] In some optional embodiments, the first lens unit is a retroreflective lens, which includes an object side and an image side. The retroreflective lens is configured to reflect incident light passing through the object side to the object side at the image side, and then to the reflector from the image side.

[0041] In this way, by setting up the folding lens, the folding lens's function of reflecting the incident light can be utilized to compress the aperture of the incident light of the first lens unit. At the same time, without increasing the thickness of the electronic device, the focal length of the lens assembly can be further increased and the volume of the lens assembly can be reduced.

[0042] In some optional embodiments, the edge area of ​​the object side surface and the middle area of ​​the image side surface are both refractive areas, the middle area of ​​the object side surface and the edge area of ​​the image side surface are both reflective areas, and the refractive area and the reflective area are smoothly connected.

[0043] In this way, by setting the refractive area and the reflective area on the object side and the image side, the folding lens can realize the folding function of the incident light entering, so as to compress the aperture of the incident light.

[0044] In some optional embodiments, the second lens unit includes at least one lens and is configured to be capable of independent imaging so as to realize the imaging function of the lens assembly.

[0045] In some optional implementations, the lens assembly is a telephoto lens assembly. In this way, the telephoto lens assembly has an anti-shake function, can maximize the resolution of the image taken by the telephoto lens assembly, ensure the edge quality of the picture, improve the shooting quality, and at the same time, can make the lens assembly have a longer focal length, so as to better show the details of distant objects in the target area.

[0046] A second aspect of an embodiment of the present application provides a control method for a lens assembly, which is applied to any of the above lens assemblies, and the control method includes:

[0047] Acquiring a vibration parameter of the lens assembly during the process of photographing the target area, the vibration parameter including at least one of a frequency and an amplitude;

[0048] Determining a rotation parameter of a reflector in the lens assembly according to the vibration parameter, wherein the rotation parameter includes a preset angle;

[0049] The reflector is controlled to rotate at a preset angle relative to the second lens unit in the lens assembly so that the viewing angle range of the second lens unit matches the target area.

[0050] In this way, when the lens assembly shakes during the process of shooting the target area, the reflector can be controlled to rotate a preset angle relative to the second lens unit in the lens assembly, so that the field of view angle range of the second lens unit matches the target area, and the image shake caused by the shaking of the first lens unit and the second lens unit is compensated for by displacement. While realizing the anti-shake function of the lens assembly, since the positions of the first lens unit and the second lens unit relative to the image sensor in the camera module are relatively constant, the lens assembly of the present application can also maximize the resolution of the captured image, ensure the edge quality of the picture, and improve the shooting quality.

[0051] In some optional implementations, determining the rotation parameters of the reflector in the lens assembly according to the vibration parameters specifically includes:

[0052] Determine, according to the vibration parameter, an offset parameter of the field angle range of the second lens unit relative to the target area during the process of the lens assembly photographing the target area, wherein the offset parameter includes at least one of an offset frequency and an offset angle;

[0053] The rotation parameters of the reflector are determined according to the offset parameters.

[0054] In this way, by determining the rotation parameters of the reflector, it can also be ensured that the reflector can rotate at the same frequency as the lens assembly, and it can be ensured that through the rotation of the reflector, the offset of the field of view angle range of the second lens unit can be compensated for, so that the field of view angle range of the second lens unit matches the target area, thereby realizing the anti-shake function of the lens assembly.

[0055] In some optional embodiments, controlling the reflector to rotate by a preset angle relative to the second lens unit so that the field of view angle range of the second lens unit matches the target area specifically includes:

[0056] When the field of view angle range of the second lens unit is offset relative to the target area, the reflector is controlled to rotate relative to the second lens unit along the central axis on its own mirror surface at a preset angle so that the field of view angle range of the second lens unit moves toward the first direction and matches the target area; wherein the first direction is opposite to the offset direction of the field of view angle range of the second lens unit.

[0057] In this way, by rotating the reflector along the central axis on its own mirror surface relative to the second lens unit by a preset angle, the field of view angle range of the second lens unit can be displaced toward the first direction, thereby performing displacement compensation for the offset of the field of view angle range of the second lens unit, ensuring that after the reflector is rotated by the preset angle, the field of view angle range of the second lens unit matches the target area.

[0058] In some optional embodiments, the central rotation axis includes a first rotation axis and a second rotation axis, the preset angle includes a first preset angle and a second preset angle, and the offset direction includes at least one of a first offset direction and a second offset direction;

[0059] Controlling the reflector to rotate relative to the second lens unit at a preset angle around a central rotation axis on its own mirror surface specifically includes:

[0060] When the field angle range of the second lens unit shifts toward a first shift direction relative to the target area, controlling the reflector to rotate relative to the second lens unit around the first rotation axis by a first preset angle;

[0061] When the viewing angle range of the second lens unit shifts toward the second shift direction relative to the target area, the reflector is controlled to rotate around the second rotation axis relative to the second lens unit at a second preset angle.

[0062] The present application can compensate for the displacement of the field of view angle range of the second lens unit in the first offset direction by rotating the reflector around the first rotation axis, which is conducive to matching the field of view angle range of the second lens unit with the target area in the first offset direction. The present application can compensate for the displacement of the field of view angle range of the second lens unit in the second offset direction by rotating the reflector around the second rotation axis, which is conducive to matching the field of view angle range of the second lens unit with the target area in the second offset direction.

[0063] In some optional implementations, the rotation parameter further includes a rotation frequency, and the rotation frequency matches the frequency of the vibration parameter so that the reflector can rotate at the same frequency as the lens assembly during shooting.

[0064] A third aspect of an embodiment of the present application provides a camera module, which includes an image sensor and a lens assembly as described above, wherein the image sensor is located on the image side of the second lens unit in the lens assembly.

[0065] The present application realizes the anti-shake function of the lens assembly by setting the lens assembly in the camera module. At the same time, the positions of the first lens unit and the second lens unit in the lens assembly relative to the image sensor are relatively constant. It can also maximize the resolution of the image taken by the camera module, ensure the edge quality of the picture, and improve the shooting quality.

[0066] A fourth aspect of an embodiment of the present application provides an electronic device, which includes a housing and the above-mentioned camera module, wherein the camera module is located in a receiving space of the housing.

[0067] This application, through the setting of a camera module in an electronic device, can not only realize the shooting and anti-shake functions of the electronic device, but also maximize the resolution of the image taken by the camera module, ensure the edge quality of the picture, and improve the shooting quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0068] Figure 1 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application;

[0069] Figure 2 A schematic diagram of partial disassembly of an electronic device provided in an embodiment of the present application;

[0070] Figure 3 A schematic diagram of the structure of a camera module provided in the related art;

[0071] Figure 4 A schematic diagram of anti-shake of a camera module provided in the related art;

[0072] Figure 5 A schematic structural diagram of a first lens assembly provided in an embodiment of the present application;

[0073] Figure 6 A schematic diagram of the field of view angle range of each lens unit in the lens assembly provided in an embodiment of the present application;

[0074] Figure 7 A schematic diagram of the structure of a reflector provided in an embodiment of the present application;

[0075] Figure 8 A schematic diagram of the anti-shake principle of the lens assembly provided in an embodiment of the present application;

[0076] Fig. 9 A schematic diagram of the structure of a second lens assembly provided in an embodiment of the present application;

[0077] Fig.10 A schematic diagram of the structure of a third lens assembly provided in an embodiment of the present application;

[0078] Fig.11 A schematic structural diagram of a fourth lens assembly provided in an embodiment of the present application;

[0079] Fig.12 A schematic structural diagram of a fifth lens assembly provided in an embodiment of the present application;

[0080] Fig.13 A schematic structural diagram of a sixth lens assembly provided in an embodiment of the present application;

[0081] Fig.14 for Fig.12 A schematic structural diagram of the first lens unit;

[0082] Fig.15 for Fig.13 A schematic structural diagram of the first lens unit;

[0083] Fig.16 A schematic diagram of the structure of another camera module provided in the related art;

[0084] Fig.17 A flowchart of a method for controlling a lens assembly provided in an embodiment of the present application;

[0085] Fig.18 for Fig.17 A schematic diagram of a process for determining the rotation parameters of a reflector in a lens assembly based on vibration parameters.

[0086] Description of reference numerals:

[0087] 100-electronic device; 1-display screen; 2-housing; 21-middle frame; 211-frame; 212-middle plate; 22-back cover; 221-lens cover plate; 3-camera module;

[0088] 31-lens assembly; 311-first lens unit; 3111-first lens group; 3112-second lens group; 3113-prism; 3113a-light incident surface; 3113b-reflection surface; 3113c-light exit surface; 3114-object side surface; 3115-image side surface; 3116-refractive region; 3117-reflection region; 3118-first transition region; 3119-second transition region; 312-second lens unit; 313-reflector; 3131-first rotation axis; 3132-second rotation axis;

[0089] 32-image sensor; 33-driving device; 34-filter; 35-lens; 36-total reflection mirror; 37-first shape memory alloy wire; 38-circuit assembly; 4-circuit board;

[0090] 200-Incident light. DETAILED DESCRIPTION

[0091] The terms used in the implementation section of this application are only used to explain the specific embodiments of this application and are not intended to limit this application.

[0092] To facilitate understanding, the relevant technical terms involved in the embodiments of the present application are first explained and illustrated.

[0093] Focal length, also known as focal length, is a measure of the concentration or dispersion of light in an optical system. It refers to the vertical distance from the optical center of a lens or lens group to the focal plane when an infinitely distant scene forms a clear image on the focal plane through a lens or lens group.

[0094] The optical axis refers to the straight line passing through the centers of each lens in the lens assembly.

[0095] Resolution reflects the fineness of the details of a bitmap image. The higher the resolution of an image, the more pixels it contains and the clearer the image.

[0096] The field of view (FOV) is the angle formed by the two edges of the maximum range through which the image of the object can pass through the lens assembly, with the lens assembly as the vertex.

[0097] The object side is the side where the object is located, with the lens assembly as the boundary, and the side of the lens in the lens assembly facing the object side is the object side of the lens.

[0098] The image side is the side where the image of the object is located, with the lens assembly as the boundary, and the side of the lens in the lens assembly facing the image side is the image side of the lens.

[0099] Entrance pupil: The aperture forms an image into the object space through the lens in front of it. This image is called the entrance pupil, or simply the entrance pupil.

[0100] Exit pupil: The aperture forms an image into the image space through the lens behind it. This image is called the exit pupil, or simply the exit pupil.

[0101] Aperture stop: In an optical system, an element that limits the aperture angle of a light beam emitted by an on-axis point is referred to as an aperture stop. It determines how large a light beam is that can enter the optical system at each point on the object.

[0102] The clear aperture, also known as the light-clearing aperture, in the camera module refers to the diameter of the circular hole produced by the variable aperture (blade group) in the center of the lens assembly when adjusting the aperture.

[0103] A telephoto lens is a photographic lens with a longer focal length than a standard lens. A telephoto lens is also called a telephoto lens or a telephoto lens. For example, the focal length of a telephoto lens ranges from 135mm to 800mm, and some are even longer.

[0104] An embodiment of the present application provides an electronic device, which may include but is not limited to a mobile phone, a tablet computer (i.e., a pad), a virtual reality (VR) device, a laptop computer, a personal computer (PC), an ultra-mobile personal computer (UMPC), a handheld computer, a smart wearable device, and other electronic devices with a shooting function.

[0105] Figure 1 A schematic diagram of the structure of an electronic device is shown. Figure 2 A schematic diagram of partial disassembly of an electronic device is shown.

[0106] refer to Figure 1 and Figure 2 As shown, the electronic device 100 provided in the embodiment of the present application may include a shell 2, the shell 2 includes a middle frame 21 and a back cover 22, wherein the middle frame 21 includes a back cover 22 connected to one side of the middle frame 21, and together with the middle frame 21, provides a structural frame for the electronic device 100.

[0107] Continue to refer Figure 2 As shown, in some embodiments, the middle frame 21 includes a middle plate 212 and a frame 211 connected to each other, and the frame 211 is arranged around the peripheral edge of the middle plate 212 and together with the middle plate 212 constitutes the middle frame 21. The frame 211 is a square ring structure composed of multiple frames 211 connected end to end.

[0108] refer to Figure 2 As shown, in some embodiments, when the electronic device 100 has a display function (for example, the electronic device 100 is a mobile phone), the electronic device 100 also includes a display screen 1, and the display screen 1 is installed on the side of the frame 211 opposite to the back cover 22. The back cover 22 is covered on one side of the middle frame 21, and together with the middle frame 21 and the back cover 22, it encloses a storage space for the electronic device 100 (not shown in the figure). The storage space can be used to accommodate structural parts such as the circuit board 4, the camera module 3, the battery, the microphone, the speaker and the earpiece of the electronic device 100. Among them, the display screen 1 is electrically connected to the circuit board 4 so that the display screen 1 can realize the display or operation function. The camera module 3 is electrically connected to the circuit board 4 so that when the user inputs a shooting command, the camera module 3 can be controlled by the circuit board 4 to capture an image, thereby realizing the shooting function of the electronic device 100.

[0109] The structure of the electronic device 100 of the embodiment of the present application is further described below by taking a mobile phone as an example.

[0110] Figure 2 It is shown that a camera module is provided in the electronic device. It should be noted that in actual applications, the number of camera modules 3 is not limited to one, and the number of camera modules 3 may also be two or more than two. In order to enhance the shooting performance of the electronic device 100, a plurality of (for example, three, four or five) camera modules 3 are usually provided in the electronic device 100. Among them, some camera modules 3 may be arranged on the side of the middle frame 21 facing the display screen 1 to form a front camera module. Other camera modules 3 may be arranged on the side of the middle frame 21 facing the back cover 22 to form a rear camera module. In the present application, the specific positions of the front camera module and the rear camera module in the electronic device 100 are not further limited.

[0111] Figure 3 This is a structural schematic diagram of a camera module provided in the related technology to facilitate understanding of the structure of the camera module.

[0112] refer to Figure 3 As shown, the camera module 3a generally includes a lens 35, an image sensor 32a, a driving device 33 and a filter 34. The lens 35 is generally composed of one or more stacked lenses (such as lenses). The lens 35 can be assembled in the driving device 33 so that the lens 35 can be driven to move by the driving device 33 to realize the zoom, focus or optical image stabilization function of the camera module 3a. The filter 34 and the image sensor 32a are sequentially arranged on the light-emitting side of the lens 35. The image sensor 32a is usually electrically connected to the circuit board 4. The light outside the electronic device 100 enters the lens 35 through the lens cover plate 221 on the light-transmitting rear cover 22, and after being emitted through the lens 35, it can pass through the filter 34 and the image sensor 32a in sequence, and after being processed by the image sensor 32a, an image is formed, thereby realizing the shooting function of the camera module 3a.

[0113] The camera module 3a in the electronic device 100 may include but is not limited to a variable focal length module such as an auto focus (AF) module, a fixed focus (FF) module, a wide-angle camera module, a telephoto camera module, a color camera module or a black and white camera module.

[0114] When people hold the electronic device 100 to shoot, it is inevitable that the body will shake. During the shaking of the body, it is possible that the sensor in the camera module 3 receives different light beams at the same position and superimposes them, resulting in blurred final image. In particular, when the camera module 3 is affected by the body shaking when shooting a video, the continuous stability of the video image will be reduced, and even the video content cannot be seen clearly. Among them, the image taken by the telephoto camera module is most obviously affected by the body shaking.

[0115] With the continuous development and wide application of the camera module 3 , people's pursuit of the experience of the electronic device 100 is becoming more and more extreme, including the pursuit of the shooting quality of the camera module 3 .

[0116] In order to overcome the influence of the shaking of the electronic device 100 on the camera module 3 during the shooting process, at present, most electronic devices 100 have an anti-shake function when shooting, so as to improve the shooting quality through the anti-shake function. The anti-shake function of the existing electronic device 100 is mainly through optical image stabilization (Optical Image Stabilizer, OIS) anti-shake or sensor displacement optical image stabilization. Among them, optical image stabilization is referred to as OIS optical image stabilization.

[0117] Figure 4 The anti-shake schematic diagram of the camera module provided in the related art is illustrated.

[0118] refer to Figure 4 As shown, the OIS optical image stabilization supported by most existing electronic devices 100 is mainly through the OIS optical image stabilization of the lens 35, and the OIS optical image stabilization of the lens 35 is mainly through the movable design of the lens 35. When the electronic device 100 shoots at the target area, the incident light 200a enters the lens 35. If the body shakes during the shooting process, the motor or the memory metal mechanical structure can push the lens 35 to move relative to the image sensor 32a along the y direction to realize the anti-shake function of the camera module 3a and the electronic device 100.

[0119] Continue to refer Figure 4 As shown, the sensor-shift optical image stabilization is mainly achieved through the movable design of the image sensor 32a. When the body of the electronic device 100 shakes during shooting, the image sensor 32a can be moved along the y direction relative to the lens 35 to realize the image stabilization function of the camera module 3a and the electronic device 100.

[0120] However, in realizing the anti-shake function of the electronic device 100, whether it is the OIS optical image stabilization of the lens 35 or the sensor displacement optical image stabilization, the lens 35 and the image sensor 32a are not moved as a whole for anti-shake, but one of the lens 35 and the image sensor 32a moves relative to the other. Although this can realize the anti-shake function of the electronic device 100, due to the separate movement of the lens 35 and the image sensor 32a, this will lose the image resolution, reduce the image edge quality, and affect the video quality.

[0121] Therefore, how to realize the anti-shake function of the electronic device 100 while effectively solving the problem of image edge quality degradation and video quality impact caused by the separate movement of the lens 35 and the image sensor 32a has become a technical problem to be solved.

[0122] In view of this, an embodiment of the present application also provides a lens assembly, which can be applied to a camera module and an electronic device. By improving the structure of the lens assembly, not only can the anti-shake function of the lens assembly, the camera module and the electronic device be achieved, but also the resolution of the image taken by the lens assembly can be maximized, ensuring the edge quality of the picture and improving the shooting quality.

[0123] The structure of the lens assembly of the present application is further described below in conjunction with the accompanying drawings and embodiments.

[0124] Figure 5 A schematic diagram of the structure of the first lens assembly is shown.

[0125] refer to Figure 5 As shown, the lens assembly 31 includes a first lens unit 311, a second lens unit 312 and a reflector 313. The second lens unit 312 is located on the object side of the first lens unit 311 and is relatively fixed to the first lens unit 311. Relatively fixed can be understood as the position of the second lens unit 312 relative to the first lens unit 311 does not change.

[0126] like Figure 5 As shown in the figure, the optical axis of the second lens unit 312 and the optical axis of the first lens unit 311 are located in different directions, and the reflector 313 is located at the junction of the exit pupil of the first lens unit 311 and the entrance pupil of the second lens unit 312, so that the reflector 313 can reflect the light beam emitted by the first lens unit 311 to the second lens unit 312 to realize the imaging function of the lens assembly 31. At the same time, since the positions of the second lens unit 312 and the first lens unit 311 are relatively fixed, the positions of the first lens unit 311 and the second lens unit 312 in the lens assembly 31 are relatively constant.

[0127] For ease of description, the optical axis of the first lens unit 311 is referred to as the first optical axis, and the optical axis of the second lens unit 312 is referred to as the second optical axis. Figure 5 The Y direction in the second optical axis can be referred to Figure 5 The first optical axis and the second optical axis have an included angle (e.g., 90 degrees) and intersect in the same plane to form the optical axis of the lens assembly 31, so that the reflector 313 can be located at the junction of the exit pupil of the first lens unit 311 and the entrance pupil of the second lens unit 312, and reflect the light beam emitted by the first lens unit 311 to the second lens unit 312.

[0128] It should be noted that Figure 5 The Y direction and the Z direction are merely schematic diagrams of the directions in which the first optical axis and the second optical axis are located, and do not constitute a limitation on the angle between the first optical axis and the second optical axis.

[0129] When the handheld electronic device 100 shakes while photographing a target area, the position of the lens assembly 31 in the electronic device 100 also shifts, which causes the field of view angle range of the first lens unit 311 and the field of view angle range of the second lens unit 312 to shift synchronously relative to the target area.

[0130] refer to Figure 5 As shown, in order to realize the imaging function of the lens assembly 31, the reflector 313 is also configured to be able to rotate relative to the second lens unit 312 when the field of view angle range of the second lens unit 312 is offset relative to the target area, so that the field of view angle range of the second lens unit 312 matches the target area. It should be noted that the field of view angle range of the second lens unit 312 matches the target area can be understood as the field of view angle range of the second lens unit 312 is aligned with the target area. In this way, when the lens assembly 31 shakes with the electronic device 100, causing the field of view angle range of the first lens unit 311 and the field of view angle range of the second lens unit 312 to be synchronously offset relative to the target area, the reflector 313 can be rotated relative to the second lens unit 312 to make the field of view angle range of the second lens unit 312 move in the direction opposite to its own offset, and the offset of the field of view angle range of the second lens unit 312 relative to the target area is compensated for, thereby ensuring that the field of view angle range of the second lens unit 312 can match the target area, and the image shake caused by the shaking of the first lens unit 311 and the second lens unit 312 is compensated for, thereby realizing the anti-shake function of the lens assembly 31.

[0131] It should be noted that, since the positions of the first lens unit 311 and the second lens unit 312 in the lens assembly 31 are relatively constant, when the reflector 313 rotates relative to the second lens unit 312, it also rotates relative to the first lens unit 311. When the lens assembly 31 is applied to the camera module 3 and the electronic device 100, the anti-shake function of the camera module 3 and the electronic device 100 can be realized.

[0132] When the electronic device 100 shakes, the lens assembly 31 and the image sensor 32 shake synchronously with the electronic device 100 as a whole. The present application only realizes the anti-shake function of the lens assembly 31 by rotating the reflector 313. Therefore, in the process of realizing the anti-shake function of the lens assembly 31, the positions of the first lens unit 311 and the second lens unit 312 relative to the image sensor 32 are relatively constant. Therefore, compared with the OIS optical image stabilization and sensor-shift optical image stabilization of the above-mentioned lens 35, the lens assembly 31 of the present application can also maximize the resolution of the captured image, ensure the edge quality of the picture, and improve the shooting quality.

[0133] Figure 6 A schematic diagram illustrating the viewing angle range of the first lens unit and the second lens unit is shown.

[0134] refer to Figure 6 As shown, the field of view angle range of the second lens unit 312 is smaller than the field of view angle range of the first lens unit 311, and the field of view angle range of the second lens unit 312 is located in the middle of the field of view angle range of the first lens unit 311. The middle of the field of view angle range can be understood as the middle area of ​​the field of view angle range, rather than the edge area, and the middle of the field of view angle range includes the symmetric center of the field of view angle range of the first lens unit 311. In this way, by limiting the field of view angle range of the first lens unit 311 and the second lens unit 312, when the lens assembly 31 shakes with the electronic device 100, after the displacement compensation of the field of view angle range of the second lens unit 312 relative to the target area is performed by rotating the reflector 313, it can be ensured that the field of view angle range of the second lens unit 312 is still within the field of view angle range of the first lens unit 311, thereby ensuring that the field of view angle range of the second lens unit 312 can match the target area.

[0135] Among them, the field of view angle range of the first lens unit 311 includes the field of view angle range and the preset jitter range (not shown in the figure) of the second lens unit 312, and the field of view angle range of the second lens unit 312 and the preset jitter range together form the field of view angle range of the first lens unit 311. The preset jitter range can be understood as a preset jitter range formed by the maximum jitter range that occurs in each possible jitter direction. The maximum jitter range can be determined by studying the law of jitter during the user's shooting process. In this application, the field of view angle range of the first lens unit 311 and the field of view angle range of the second lens unit 312 are not further limited.

[0136] In this way, when the lens assembly 31 shakes with the electronic device 100 and the field of view angle range of the second lens unit 312 is compensated for relative to the target area by the rotation of the reflector 313, the field of view angle range of the second lens unit 312 is still within the field of view angle range of the first lens unit 311 and is located in the middle of the field of view angle range of the first lens unit 311, thereby matching the target area and realizing the anti-shake function of the lens assembly 31.

[0137] Figure 7 The schematic diagram of the structure of the reflector on its own mirror side is shown. The figure does not constitute a limitation on the structure of the reflector 313, but is only for the convenience of understanding that the emitting mirror is rotating.

[0138] refer to Figure 7 Combined with Figure 5 As shown, the reflector 313 is configured to be able to rotate relative to the second lens unit 312 around the central axis on its own mirror surface, so that the field angle range of the second lens unit 312 moves toward the first direction and matches the target area. The first direction is opposite to the offset direction of the field angle range of the second lens unit 312. In this way, by rotating the reflector 313 relative to the second lens unit 312 around the central axis on its own mirror surface, while ensuring the imaging function of the lens assembly 31, the offset of the field angle range of the second lens unit 312 can be compensated by the reflector 313, so that after the reflector 313 rotates, the field angle range of the second lens unit 312 can move toward the first direction after the offset, so that the field angle range of the second lens unit 312 can match the target area, ensuring that the target area is always located at the center of the image, and realizing the anti-shake function of the lens assembly 31. It should be noted that the central axis can be understood as an axis passing through the center position of the mirror surface.

[0139] When the handheld electronic device 100 shakes while photographing the target area, the first lens unit 311 and the second lens unit 312 often have different viewing angles. Figure 6At least one of the H direction and the V direction in the embodiment is offset, so that the field of view angle ranges of the first lens unit 311 and the second lens unit 312 are offset relative to the target area.

[0140] Continue to refer Figure 7 Combined with Figure 5 As shown, the central rotation axis includes a first rotation axis 3131 and a second rotation axis 3132, and the first rotation axis 3131 and the second rotation axis 3132 are located in different directions of the reflector 313 on its own mirror surface. The direction of the first rotation axis 3131 can be understood as Figure 7 The M direction in the figure, the direction in which the second rotation axis 3132 is located can be understood as Figure 7 The offset direction includes at least one of a first offset direction and a second offset direction. The first offset direction may refer to the V direction mentioned above, and the second offset direction may refer to the H direction mentioned above.

[0141] The first rotation axis 3131 corresponds to one of the first offset direction and the second offset direction, and the second rotation axis 3132 corresponds to the other of the first offset direction and the second offset direction. For example, the first rotation axis 3131 may correspond to the first offset direction, and the second rotation axis 3132 may correspond to the second offset direction. In some embodiments, the first rotation axis 3131 may also correspond to the second offset direction, and the second rotation axis 3132 may correspond to the first offset direction.

[0142] In this way, by setting the first rotating shaft 3131 and the second rotating shaft 3132, when the field of view angle range of the second lens unit 312 is offset toward at least one of the first offset direction and the second offset direction due to the shaking of the lens assembly 31, the reflector 313 can rotate around the central rotating shaft corresponding to the offset direction to ensure that the field of view angle range of the second lens unit 312 matches the target area, thereby realizing the anti-shake function of the lens assembly 31 while ensuring that the positions of the first lens unit 311 and the second lens unit 312 relative to the image sensor 32 are relatively constant.

[0143] The following takes the example that the first rotation axis 3131 can correspond to the first offset direction and the second rotation axis 3132 can correspond to the second offset direction as an example to further illustrate the rotation and shaking principle of the reflector 313.

[0144] Figure 8 A schematic diagram illustrating the anti-shake principle of the lens assembly.

[0145] refer to Figure 8 Combined with Figure 7 and Figure 5As shown, the reflector 313 is configured to rotate relative to the second lens unit 312 around the first rotation axis 3131 (M direction) by a first preset angle when the field of view angle range of the second lens unit 312 is offset relative to the target area toward the first offset direction (V direction), so that the field of view angle range of the second lens unit 312 can move toward the target area along the first direction through the rotation of the reflector 313 around the first rotation axis 3131, thereby performing displacement compensation for the offset of the field of view angle range of the second lens unit 312 in the first offset direction, which is conducive to matching the field of view angle range of the second lens unit 312 with the target area in the first offset direction. At this time, the first direction can be understood as the opposite direction of the field of view angle range of the second lens unit 312 moving relative to the target area toward the first offset direction.

[0146] The first preset angle satisfies the condition:

[0147] α=Φ / 2

[0148] Wherein, α is a first preset angle (not shown in the figure), and Φ is an offset angle of the field of view angle range of the second lens unit 312 relative to the target area in the first offset direction (not shown in the figure).

[0149] refer to Figure 8 As shown, when the offset angle of the field of view angle range of the second lens unit 312 relative to the target area in the first offset direction is Φ, according to the reflection principle of the reflector 313, the reflector 313 only needs to rotate α around the first rotation axis 3131 relative to the second lens unit 312. After the offset, the field of view angle range of the second lens unit 312 can move toward the first direction to the initial position in the first offset direction, thereby matching the target area in the first offset direction.

[0150] refer to Figure 8 Combined with Figure 7 and Figure 5 As shown, the reflector 313 is also configured to rotate relative to the second lens unit 312 about the second rotation axis 3132 (N direction) at a second preset angle when the field of view angle range of the second lens unit 312 is offset relative to the target area toward the second offset direction (H direction), so that the field of view angle range of the second lens unit 312 can be moved toward the target area along the first direction by rotating the reflector 313 about the second rotation axis 3132, thereby performing displacement compensation for the offset of the field of view angle range of the second lens unit 312 in the second offset direction, which is conducive to matching the field of view angle range of the second lens unit 312 with the target area in the second offset direction. At this time, the first direction can be understood as the opposite direction in which the field of view angle range of the second lens unit 312 moves relative to the target area toward the second offset direction.

[0151] The second preset angle satisfies the condition:

[0152] β=Ψ / 2

[0153] In the formula, β is the second preset angle, and Ψ is the offset angle of the field of view angle range of the second lens unit 312 relative to the target area in the second offset direction (not shown in the figure).

[0154] refer to Figure 8 As shown, when the field of view angle range of the second lens unit 312 is offset by an angle Ψ relative to the target area in the second offset direction, according to the reflection principle of the reflector 313, the reflector 313 only needs to rotate β relative to the second lens unit 312 around the second rotation axis 3132. After the offset, the field of view angle range of the second lens unit 312 can move toward the first direction to the initial position in the second offset direction, thereby matching the target area in the second offset direction.

[0155] Continue to refer Figure 8 Specifically, when the electronic device 100 shakes, causing the field angle ranges of the first lens unit 311 and the second lens unit 312 to shift synchronously relative to the target area toward the first shift direction, the field angle ranges of the first lens unit 311 and the second lens unit 312 can shift relative to the target area toward V + Direction movement or V - Similarly, when the electronic device 100 shakes, causing the field angle ranges of the first lens unit 311 and the second lens unit 312 to shift relative to the target area toward the second shift direction, the field angle ranges of the first lens unit 311 and the second lens unit 312 can shift relative to the target area toward H. + Direction movement or H - Direction shifts.

[0156] The following is a view angle range of the second lens unit 312 at V + and H + Taking the deviation in the direction as an example, the anti-shake principle of the lens assembly 31 is further explained.

[0157] refer to Figure 8 As shown, when the electronic device 100 is photographing a target area and before shaking, the first lens unit 311 and the second lens unit 312 are both located at the initial positions. At this time, the field of view angle range of the second lens unit 312 is located in the middle of the field of view angle range of the first lens unit 311, and the target area is located in the middle of the field of view angle range of the first lens unit 311 and the field of view angle range of the second lens unit 312.

[0158] When the lens assembly 31 shakes due to the shaking of the electronic device 100, the field of view angles of the first lens unit 311 and the second lens unit 312 are both directed toward V + and H + When the direction is moved from the dotted frame to the solid frame, the viewing angle ranges of the first lens unit 311 and the second lens unit 312 are both relative to the target area. Figure 8 a + At this time, the reflector 313 can rotate around the first rotation axis 3131 by a first preset angle and around the second rotation axis 3132 by a second preset angle, so that the field of view of the second lens unit 312 is directed toward Figure 8 a - The direction is shifted toward the target area, and moved to the initial position of the field angle range of the second lens unit 312. At this time, the field angle range of the second lens unit 312 is located in the middle of the field angle range of the first lens unit 311, so that the lens assembly 31 can still match the target area for shooting after shaking, realizing the anti-shake function of the lens assembly 31.

[0159] When the field of view angle range of the second lens unit 312 is shifted toward other directions due to the shaking of the electronic device 100, the rotation of the reflector 313 and the movement of the field of view angle range of the second lens unit 312 can refer to the field of view angle range of the second lens unit 312 in V + and H + The description of the directional offset is not further elaborated here.

[0160] It should be noted that, generally, the rotation of the reflector 313 on the first rotation axis 3131 and the second rotation axis 3132 is a small rotation (for example, a rotation of 1-2 degrees). Figure 5 The rotation angle of the middle reflector 313 on the second rotation shaft 3132 does not constitute a limitation on the second preset angle β, but is only for the convenience of intuitively observing the rotation of the reflector 313 on the second rotation shaft 3132 .

[0161] Fig. 9 A schematic diagram of the structure of the second lens assembly is shown.

[0162] refer to Fig. 9 As shown, the exit pupil of the first lens unit 311 coincides with the entrance pupil of the second lens unit 312 and is located at the center of the reflector 313 to avoid the introduction of aberrations when the reflector 313 rotates around at least one of the first rotation axis 3131 and the second rotation axis 3132, thereby further improving the shooting quality of the lens assembly 31.

[0163] In the present application, the first lens unit 311 includes at least one lens and is configured to compress the aperture (clear aperture) of the incident light 200 of the first lens unit 311, so that after the aperture of the incident light 200 is compressed by the first lens unit 311, the structural size of the reflector 313 can be reduced, so as to facilitate the control of the reflector 313 and enhance the reliability of the rotation of the reflector 313. At the same time, the lens assembly 31 can also have the characteristics of small size and light weight, which is conducive to the miniaturization of the lens assembly 31.

[0164] Fig.10 The schematic diagram of the structure of the third lens assembly is shown. Fig.11 A structural schematic diagram of a fourth lens assembly is shown.

[0165] refer to Figures 9 to 11 As shown, in some embodiments, the first lens unit 311 may include a telephoto unit, the telephoto unit includes a first lens group 3111 and a second lens group 3112, the first lens group 3111 and the second lens group 3112 include at least one lens. The first lens group 3111 is configured to converge the incident light 200 to the second lens group 3112. The second lens group 3112 is located on the object side of the first lens group 3111, and is configured to diffuse the incident light 200 passing through the first lens group 3111 and project it to the reflector 313 as a parallel light beam. In this way, by arranging the first lens group 3111 and the second lens group 3112 in the telephoto unit, it is possible not only to compress the aperture of the incident light 200 of the first lens unit 311 and reduce the structural size and volume of the reflector 313, but also because the incident light 200 is generally parallel light, and the incident light 200 passing through the first lens group 3111 is diffused by the second lens group 3112 and then projected to the reflector 313 as a parallel light beam, so that the incident light 200 can enter the first lens unit 311 as parallel light and exit as parallel light, so as to ensure that more incident light 200 can enter the second lens unit 312, thereby realizing the telephoto function of the lens assembly 31.

[0166] In some embodiments, the focal lengths of the first lens group 3111 and the second lens group 3112 can both be positive focal lengths (eg Figure 5 ), and the convergence point of the first lens group 3111 is located on the object side of the second lens group 3112 to form a first lens unit 311. Alternatively, refer to Fig. 9As shown, in some embodiments, the focal length of the first lens group 3111 may be a positive focal length, the focal length of the second lens group 3112 may be a negative focal length, and the convergence point of the first lens group 3111 is located on the image side of the second lens group 3112 to form a second type of first lens unit 311. In this way, by setting the focal lengths of the first lens group 3111 and the second lens group 3112, the telephoto function of the telephoto unit is realized, the aperture of the incident light 200 of the first lens unit 311 is compressed, and the structure of the telephoto unit and the lens assembly 31 can be made more diversified.

[0167] It should be noted that the second type of first lens unit 311 is shorter than the first type of first lens unit 311 , which is beneficial for further reducing the size of the lens assembly 31 and realizing miniaturization of the lens assembly 31 .

[0168] The first lens group 3111 may include one lens or more (for example, greater than or equal to two) lenses, and similarly, the second lens group 3112 may also include one lens or more (for example, greater than or equal to two) lenses. In the present application, no further limitation is made on the number of the first lens group 3111 and the second lens group 3112, the structure of each lens, and the focal length, as long as the focal length of the first lens group 3111 is a positive focal length and the focal length of the second lens group 3112 is a positive focal length or a negative focal length.

[0169] refer to Fig. 9 As shown, in some embodiments, the first lens unit 311, the second lens unit 312 and the reflector 313 can be arranged in sequence along the Y direction of the electronic device 100 and located in the XY plane of the electronic device 100 to avoid the lens assembly 31 from having too much impact on the thickness of the electronic device 100, which is beneficial to the thinning of the electronic device 100.

[0170] The Y direction can be understood as the length direction of the electronic device 100, and the XY plane can be understood as the plane formed by the length direction and the width direction of the electronic device 100, which is parallel to the display surface of the display screen 1 of the electronic device 100 (such as Figure 1 shown).

[0171] At this time, if Fig. 9As shown in , the first lens unit 311 may further include a prism 3113, the prism 3113 is located on the object side of the first lens group 3111, and the prism 3113 may include a light incident surface 3113a, a reflection surface 3113b, and a light emitting surface 3113c connected to each other, and the light emitting surface 3113c is arranged opposite to the first lens group 3111. The prism 3113 may be a triangular prism 3113. The prism 3113 is configured to reflect the incident light 200 incident from the light incident surface 3113a through the reflection surface 3113b, and then project it to the first lens group 3111 from the light emitting surface 3113c as a parallel light beam. In this way, by setting the prism 3113, the incident light 200 can be deflected by 90 degrees through the reflection surface 3113b, so that the deflected incident light 200 can be emitted to the first lens group 3111 as a parallel beam, thereby compressing the lens assembly 31 in the thickness direction of the electronic device 100 ( Fig. 9 The dimension in the Z direction) is beneficial to reducing the thickness of the electronic device 100.

[0172] Furthermore, since the incident light 200 is reflected by the reflective surface 3113b and then emitted to the first lens group 3111 from the light emitting surface 3113c in a parallel light beam, more incident light 200 can be emitted into the telephoto unit, thereby ensuring the telephoto function of the telephoto unit and the anti-shake function of the lens assembly 31, thereby improving the shooting quality.

[0173] Since the focal length of the lens assembly 31 is proportional to its own length, and the length of the lens assembly 31 is limited by the thickness of the electronic device 100. Under the thickness constraint of the electronic device 100, if the length of the lens assembly 31 is longer, the focal length of the lens assembly 31 is larger, and conversely, if the length of the lens assembly 31 is smaller, the focal length of the lens assembly 31 is smaller.

[0174] like Fig.10 and Fig.11 As shown, in other embodiments, the first lens unit 311, the second lens unit 312 and the reflector 313 can also be arranged in sequence along the thickness direction of the electronic device 100. In this way, under the condition that the thickness of the electronic device 100 is not increased, compared with the structure in which the prism 3113 is provided in the lens assembly 31 (such as Figure 5 and Fig. 9 As shown in the figure, the length of the lens assembly 31 of this embodiment is limited by the thickness of the electronic device 100, so that the maximum focal length that can be achieved by the lens assembly 31 of this embodiment is smaller, but it has the characteristics of small size and light weight.

[0175] Fig.12 FIG. 3 is a schematic diagram showing the structure of a fifth lens assembly 31. Fig.13 A schematic structural diagram of a sixth lens assembly 31 is shown.

[0176] refer to Fig.12 and Fig.13 As shown, in some embodiments, the first lens unit 311 is a folding lens, and the folding lens includes an object side surface 3114 and an image side surface 3115. The folding lens is configured to reflect the incident light 200 passing through the object side surface 3114 to the object side surface 3114 at the image side surface 3115, and to emit the incident light 200 from the image side surface 3115 to the reflector 313, so as to compress the aperture of the incident light 200 of the first lens unit 311 by utilizing the folding function of the folding lens on the incident light 200 entering. Moreover, compared with the above-mentioned lens assembly 31 with a telephoto system, when the lens assembly 31 achieves the same focal length, the lens assembly 31 with the folding lens can thin the first lens unit 311 and the lens assembly 31, reduce the volume of the lens assembly 31, and when the electronic device 100 has the same thickness, the lens assembly 31 with the folding lens can be made longer, thereby further increasing the focal length of the lens assembly 31.

[0177] Therefore, the lens assembly 31 with a folding lens can further increase the focal length of the lens assembly 31 and reduce the volume of the lens assembly 31 compared to the lens assembly 31 with a folding lens without increasing the thickness of the electronic device 100.

[0178] Fig.14 for Fig.12 The schematic diagram of the structure of the first lens unit, Fig.15 for Fig.13 Schematic diagram of the structure of the first lens unit.

[0179] refer to Fig.14 and Fig.15 As shown, the edge area of ​​the object side surface 3114 and the middle area of ​​the image side surface 3115 are both refractive areas 3116, the middle area of ​​the object side surface 3114 and the edge area of ​​the image side surface 3115 are both reflective areas 3117, and the refractive areas 3116 and the reflective areas 3117 are smoothly connected. In this way, by setting the refractive area 3116 and the reflective area 3117 on the object side 3114 and the image side 3115, when the incident light 200 enters the refractive area 3116 of the object side 3114 in the form of parallel light, the incident light 200 can be reflected by the reflective area 3117 on the image side 3115 to the middle area of ​​the object side 3114, and then, the incident light 200 is reflected by the reflective area 3117 on the object side 3114 to the refractive area 3116 on the image side 3115, and finally enters from the refractive area 3116 on the image side 3115, thereby realizing the function of the reflective lens to reflect the incident light 200, thereby compressing the aperture of the incident light 200.

[0180] It should be noted that the folding lens is coated with an anti-reflection film at the refractive region 3116 of the object side surface 3114 and the image side surface 3115, so that the folding lens refracts the incident light 200 at the refractive region 3116 of the object side surface 3114 and the image side surface 3115. The folding lens is coated with a reflective film at the reflective region 3117 of the object side surface 3114 and the image side surface 3115, so that the folding lens can reflect the incident light 200 at the reflective region 3117 of the object side surface 3114 and the image side surface 3115.

[0181] refer to Fig.14 and Fig.15 As shown, a transition zone is provided between the refractive region 3116 and the reflective region 3117, and the transition zone of the object side surface 3114 between the refractive region 3116 and the reflective region 3117 is a first transition zone 3118. The first transition zone 3118 does not participate in normal imaging, and the annular band width of the first transition zone 3118 does not exceed one tenth of the radius of the object side surface 3114 in the reflective region 3117 and the image side surface 3115 in the middle region to avoid the annular band width of the first transition zone 3118 being too large to cause a dark shadow on the image.

[0182] Continue to refer Fig.14 and Fig.15 As shown, the transition zone of the image side surface 3115 between the refractive area 3116 and the reflective area 3117 is a second transition zone 3119. According to the vertex position and surface shape difference of the image side surface 3115 in the reflective area 3117 and the refractive area 3116, the reflective lens can be divided into two types.

[0183] refer to Fig.14 As shown, the vertices of the refractive area 3116 and the reflective area 3117 of the image side surface 3115 of the first folding lens coincide, and the two use the same aspheric parameter. The image side surface 3115 of the first folding lens can be plated or painted black at the second transition area 3119 to prevent stray light from affecting the imaging.

[0184] It should be noted that, in the present application, there is no further limitation on the method of black plating or black painting at the second transition zone 3119. For example, in the present application, the image side surface 3115 can be black plated at the second transition zone 3119 by silk screen printing or the like, and the image side surface 3115 can be black painted at the second transition zone 3119 by ink or the like.

[0185] refer to Fig.15As shown, the vertices of the image side surface 3115 of the second type of reflective lens in the reflection area 3117 and the refractive area 3116 do not overlap, and the aspheric parameters of the two may be the same or different. The outer diameter of the image side surface 3115 of the second type of reflective lens in the reflection area 3117 and the inner diameter of the refractive area 3116 are smoothly connected through the second transition zone 3119. The second transition zone 3119 needs to adopt necessary extinction measures. In the present application, the extinction measures for the second transition zone 3119 can refer to the processing method of the first type of reflective lens in the second transition zone 3119, and no further limitation is made here.

[0186] The second lens unit 312 may include at least one lens and be configured to be capable of independent imaging so as to realize the imaging function of the lens assembly 31 .

[0187] The lens assembly 31 of the present application is a telephoto lens assembly. In this way, the telephoto lens assembly has an anti-shake function, can maximize the resolution of the image taken by the telephoto lens assembly, ensure the edge quality of the picture, improve the continuity and stability of the video picture taken by the telephoto lens assembly, improve the shooting quality, and at the same time, the lens assembly 31 can have a longer focal length to better show the details of distant objects in the target area.

[0188] Fig.16 The schematic diagram of the structure of another camera module provided in the related art is illustrated.

[0189] refer to Fig.16 As shown, the camera module 3b includes a total reflection mirror assembly (not shown in the figure), a lens assembly 31a and a circuit assembly 38, the lens assembly 31 includes a lens 35, the total reflection mirror assembly includes a total reflection mirror 36 and a first shape memory alloy wire 37 arranged on the total reflection mirror 36, the circuit assembly 38 is used to detect the jitter parameters of the total reflection mirror 36, and calculate the displacement compensation displacement according to the jitter parameters, and output a current signal to the first shape memory alloy wire 37 after calculation, so that the first shape memory alloy wire 37 can pull the total reflection mirror 36 to the displacement compensation position under the current signal, thereby realizing the anti-shake function of the camera module 3.

[0190] However, the total reflection mirror 36 is located on the object side of the lens 35 and has a large volume, which will cause the total reflection mirror 36 to be heavy and have poor reliability, affecting the anti-shake effect of the camera module 3b. The camera module 3b is usually applied to the main camera module and the front camera module of the electronic device 100. Among them, the main camera module can be understood as the camera module 3 used in the electronic device 100 to shoot most scenes.

[0191] Compared to the above-mentioned camera module 3b, in the present application, since the reflector 313 is located inside the lens assembly 31 and the aperture of the incident light 200 is compressed by the first lens unit 311, the reflector 313 has the characteristics of small size, light weight and high reliability. Moreover, the lens assembly 31 of the present application can be used as a telephoto lens assembly and applied to the camera module 3 and the electronic device 100.

[0192] On the basis of the above, the present application also provides a control method for a lens assembly 31 , which can be applied to the above-mentioned lens assembly 31 .

[0193] The control method of the lens assembly 31 of the present application is further described below in conjunction with the accompanying drawings and embodiments.

[0194] Fig.17 A flowchart diagram of a method for controlling a lens assembly is shown.

[0195] refer to Fig.17 As shown, the control method includes:

[0196] Step S100: obtaining vibration parameters of the lens assembly during the process of photographing the target area, where the vibration parameters include at least one of frequency and amplitude;

[0197] Step S200: determining a rotation parameter of a reflector in a lens assembly according to the vibration parameter, wherein the rotation parameter includes a preset angle;

[0198] Step S300: controlling the reflector to rotate relative to the second lens unit in the lens assembly at a preset angle so that the field of view angle range of the second lens unit matches the target area.

[0199] When the lens assembly 31 shakes during the process of shooting the target area, the reflector 313 can be controlled to rotate a preset angle relative to the second lens unit 312 in the lens assembly 31, so that the field of view angle range of the second lens unit 312 matches the target area, and the image shake caused by the shaking of the first lens unit 311 and the second lens unit 312 is compensated for by displacement. While realizing the anti-shake function of the lens assembly 31, since the positions of the first lens unit 311 and the second lens unit 312 relative to the image sensor 32 in the camera module 3 are relatively constant, the lens assembly 31 of the present application can also maximize the resolution of the captured image, ensure the edge quality of the picture, and improve the shooting quality.

[0200] The structure of the lens assembly 31 may refer to the relevant description above, and will not be further elaborated here.

[0201] It should be noted that the acquisition of the vibration parameters in step S100 is obtained by a sensor of the electronic device, which can be located in the receiving cavity of the electronic device 100 and can detect at least one of the vibration amplitude and the vibration frequency of the electronic device 100 during the shooting process of the electronic device 100. Since the lens assembly 31 shakes synchronously with the electronic device 100, when the sensor detects the vibration amplitude and the vibration frequency of the electronic device 100, the vibration parameters of the lens assembly 31 during the shooting process of the target area can be obtained.

[0202] Fig.18 Indicated Fig.17 A schematic diagram of a process for determining the rotation parameters of a reflector in a lens assembly based on vibration parameters.

[0203] refer to Fig.18 As shown, in step S200, the rotation parameters of the reflector in the lens assembly are determined according to the vibration parameters, which specifically includes:

[0204] Step S210: determining, according to the vibration parameter, an offset parameter of the field angle range of the second lens unit relative to the target area during the process of the lens assembly photographing the target area, wherein the offset parameter includes at least one of an offset frequency and an offset angle;

[0205] Step S220: determining the rotation parameters of the reflector according to the offset parameters.

[0206] In this way, by determining the rotation parameters of the reflector 313, it can be ensured that the reflector 313 can rotate at the same frequency as the lens assembly 31, and it can be ensured that through the rotation of the reflector 313, the offset of the field of view angle range of the second lens unit 312 is compensated for, so that the field of view angle range of the second lens unit 312 matches the target area, thereby realizing the anti-shake function of the lens assembly 31.

[0207] It should be noted that the electronic devices (such as a processor) on the circuit board 4 in the electronic device 100 can determine the offset parameters of the field of view angle range of the second lens unit 312 relative to the target area when the lens assembly 31 is shooting the target area based on the vibration parameters, and can determine the rotation parameters of the reflector 313 by calculation based on the offset parameters.

[0208] After the rotation parameters of the reflector 313 are determined, the control unit can be used to drive the reflector 313 to rotate relative to the second lens unit 312 at a preset angle, so that the field of view of the second lens unit 312 can be moved to match the target area. The control unit can be a driving device 33 in the camera module 3, and the driving device 33 can include but is not limited to a driving motor. In this way, under the drive of the driving device 33, the reflector 313 is driven by the preset angle relative to the second lens unit 312.

[0209] The rotation parameter also includes a rotation frequency, and the rotation frequency matches the frequency of the vibration parameter, that is, the rotation frequency is the same as the frequency of the vibration parameter, so as to ensure that the reflector 313 can rotate at the same frequency as the lens assembly 31, thereby better realizing the anti-shake function of the lens assembly 31.

[0210] In step S300, controlling the reflector to rotate relative to the second lens unit by a preset angle so that the field of view angle range of the second lens unit matches the target area specifically includes:

[0211] When the field of view angle range of the second lens unit 312 is offset relative to the target area, the reflector 313 is controlled to rotate along the central axis on its own mirror surface relative to the second lens unit 312 at a preset angle so that the field of view angle range of the second lens unit 312 moves toward a first direction and matches the target area; wherein the first direction is opposite to the offset direction of the field of view angle range of the second lens unit 312.

[0212] In this way, the reflector 313 is rotated along the central axis on its own mirror surface by a preset angle relative to the second lens unit 312. While ensuring the imaging function of the lens assembly 31, the field of view angle range of the second lens unit 312 can be displaced in the direction away from the offset (the first direction), thereby compensating for the offset of the field of view angle range of the second lens unit 312, ensuring that after the reflector 313 is rotated by the preset angle, the field of view angle range of the second lens unit 312 matches the target area.

[0213] As described above, the central rotation axis includes the first rotation axis 3131 and the second rotation axis 3132 , the preset angle includes the first preset angle and the second preset angle, and the offset direction includes at least one of the first offset direction and the second offset direction.

[0214] The control of the reflector 313 to rotate to a preset angle relative to the second lens unit 312 around the central axis on its own mirror surface specifically includes:

[0215] When the field angle range of the second lens unit 312 is offset toward the first offset direction relative to the target area, the reflector 313 is controlled to rotate around the first rotation axis 3131 relative to the second lens unit 312 by a first preset angle;

[0216] When the viewing angle range of the second lens unit 312 shifts toward the second shift direction relative to the target area, the reflector 313 is controlled to rotate around the second rotation axis 3132 relative to the second lens unit 312 at a second preset angle.

[0217] The present application enables the field of view angle range of the second lens unit 312 to move toward the target area in the direction opposite to the first offset direction (first direction) through the rotation of the reflector 313 around the first rotation axis 3131, thereby performing displacement compensation for the offset of the field of view angle range of the second lens unit 312 in the first offset direction through the rotation of the reflector 313, which is beneficial for the field of view angle range of the second lens unit 312 to match the target area in the first offset direction, thereby realizing the anti-shake function of the lens assembly 31 in the first offset direction.

[0218] Correspondingly, the present application can enable the field of view angle range of the second lens unit 312 to move toward the target area in the direction opposite to the second offset direction (first direction) by rotating the reflector 313 around the second rotation axis 3132, thereby performing displacement compensation for the offset of the field of view angle range of the second lens unit 312 in the second offset direction through the rotation of the reflector 313, which is beneficial for the field of view angle range of the second lens unit 312 to match the target area in the second offset direction, thereby realizing the anti-shake function of the lens assembly 31 in the second offset direction.

[0219] It should be noted that the first preset angle, the second preset angle and the anti-shake principle of the lens assembly 31 can refer to the relevant description above, and will not be further elaborated here.

[0220] On the basis of the above, the present application further provides a camera module 3, which includes an image sensor 32 and a lens assembly 31 as described above, wherein the image sensor 32 is located on the image side of the second lens unit 312 in the lens assembly 31 (for example, Fig.13 When the incident light 200 enters the first lens unit 311 (such as a folding lens) in the form of parallel light, the first lens unit 311 compresses the aperture of the incident light 200, and the compressed incident light 200 exits the first lens unit 311, is reflected by the reflector 313 and enters the second lens unit 312, and finally converges to the image sensor 32 through the second lens unit 312 to form an image, and is processed by the image sensor 32 to form an image, thereby realizing the shooting function of the camera module 3.

[0221] The present application realizes the anti-shake function of the lens assembly 31 through the setting of the lens assembly 31 in the camera module 3. During the shooting process of the camera module 3, the positions of the first lens unit 311 and the second lens unit 312 in the lens assembly 31 relative to the image sensor 32 are relatively constant. Compared with the OIS optical image stabilization and sensor-shift optical image stabilization of the above-mentioned lens 35, the resolution of the image taken by the camera module 3 can be maximized, the edge quality of the picture can be ensured, and the shooting quality can be improved.

[0222] It should be noted that the camera module 3 of the present application also includes a driving device 33, which may include but is not limited to a driving motor. The lens assembly 31 may be assembled in the driving device 33, so that the reflector 313 of the lens assembly 31 can be driven to rotate by the driving device 33, thereby realizing the anti-shake function of the lens assembly 31 and the camera module 3. The camera module 3 of the present application also includes a filter 34, which is located between the second lens unit 312 and the image sensor 32, so as to filter the light emitted by the second lens unit 312.

[0223] Since the electronic device 100 of the present application includes a shell 2 and the above-mentioned camera module 3, the camera module 3 can replace the existing camera module 3a and be located in the accommodating space of the shell 2. On the basis of ensuring the shooting function of the electronic device 100, due to the setting of the camera module 3, the electronic device 100 can also have an anti-shake function, and can also maximize the resolution of the image taken by the camera module 3, ensure the edge quality of the picture, and improve the shooting quality.

[0224] It should be noted that other possible structures of the electronic device 100 can refer to the relevant descriptions above and will not be further elaborated here.

[0225] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, or it can be an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0226] The terms "first", "second", "third", "fourth", etc. (if any) in the description and claims of the embodiments of the present application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

Claims

1. A lens assembly, characterized in that: It comprises a first lens unit, a second lens unit and a reflector, wherein the second lens unit is located on the image side of the first lens unit and is relatively fixed to the first lens unit, and the optical axis of the second lens unit and the optical axis of the first lens unit are located in different directions; The reflector is located at the junction of the exit pupil of the first lens unit and the entrance pupil of the second lens unit, and is configured to rotate relative to the second lens unit around a central rotation axis on its own mirror surface when the field of view angle range of the second lens unit deviates relative to the target area, so that the field of view angle range of the second lens unit moves toward a first direction and matches the target area; wherein the first direction is opposite to the deviation direction of the field of view angle range of the second lens unit; The central rotation axis includes a first rotation axis and a second rotation axis, wherein the first rotation axis and the second rotation axis are located in different directions of the reflector on its own mirror surface; The offset direction includes at least one of a first offset direction and a second offset direction, the first rotation axis corresponds to one of the first offset direction and the second offset direction, and the second rotation axis corresponds to the other of the first offset direction and the second offset direction; The first lens unit includes a telephoto unit and a prism, the telephoto unit includes a first lens group and a second lens group, the first lens group and the second lens group include at least one lens; the first lens group is configured to converge the incident light to the second lens group; The second lens group is located on the image side of the first lens group and is configured to diffuse the incident light passing through the first lens group and then project it to the reflector as a parallel beam; The prism is located at the object side of the first lens group, the prism comprises a light incident surface, a reflection surface and a light emitting surface connected to each other, and the light emitting surface is arranged opposite to the first lens group; The prism is configured to allow the incident light incident from the light incident surface to be reflected by the reflection surface and then emitted from the light exit surface to the first lens group in the form of a parallel beam; The viewing angle range of the second lens unit is smaller than the viewing angle range of the first lens unit, and the viewing angle range of the second lens unit is located in the middle of the viewing angle range of the first lens unit; The exit pupil of the first lens unit coincides with the entrance pupil of the second lens unit and is located at the center of the reflector.

2. The lens assembly according to claim 1, characterized in that: The reflector is configured to rotate relative to the second lens unit by a first preset angle around the first rotation axis when the viewing angle range of the second lens unit shifts relative to the target area toward the first offset direction.

3. The lens assembly according to claim 2, characterized in that: The first preset angle satisfies the condition: In the formula, is the first preset angle, is the offset angle of the field of view angle range of the second lens unit relative to the target area in the first offset direction.

4. The lens assembly according to claim 3, characterized in that: The reflector is further configured to rotate relative to the second lens unit at a second preset angle around the second rotation axis when the field of view angle range of the second lens unit shifts relative to the target area toward the second offset direction.

5. The lens assembly according to claim 4, characterized in that: The second preset angle satisfies the condition: In the formula, is the second preset angle, is the offset angle of the field of view angle range of the second lens unit relative to the target area in the second offset direction.

6. The lens assembly according to any one of claims 1 to 5, characterized in that: An optical axis of the second lens unit and an optical axis of the first lens unit have an included angle.

7. The lens assembly according to claim 1, characterized in that: The focal lengths of the first lens group and the second lens group are both positive focal lengths, and the convergence point of the first lens group is located on the object side of the second lens group, or, The focal length of the first lens group is a positive focal length, the focal length of the second lens group is a negative focal length, and the convergence point of the first lens group is located on the image side of the second lens group.

8. The lens assembly according to claim 1, characterized in that: The first lens unit is a folding lens, which includes an object side surface and an image side surface. The folding lens is configured to reflect the incident light passing through the object side surface from the image side surface to the object side surface, and then emit the incident light from the image side surface to the reflector.

9. The lens assembly according to claim 8, characterized in that: The edge area of ​​the object side surface and the middle area of ​​the image side surface are both refractive areas, the middle area of ​​the object side surface and the edge area of ​​the image side surface are both reflective areas, and the refractive areas and the reflective areas are smoothly connected.

10. The lens assembly according to any one of claims 1-5, 7-9, characterized in that: The second lens unit includes at least one lens and is configured to be capable of imaging alone.

11. The lens assembly according to any one of claims 1-5, 7-9, characterized in that: The lens assembly is a telephoto lens assembly.

12. A method for controlling a lens assembly, characterized in that: Applied to the lens assembly according to any one of claims 1 to 11, the control method comprises: Acquiring a vibration parameter of the lens assembly during the process of photographing a target area, wherein the vibration parameter includes at least one of a frequency and an amplitude; Determining a rotation parameter of a reflector in the lens assembly according to the vibration parameter, wherein the rotation parameter includes a preset angle; The reflector is controlled to rotate at the preset angle relative to the second lens unit in the lens assembly so that the field of view angle range of the second lens unit matches the target area.

13. The control method according to claim 12, characterized in that: Determining the rotation parameters of the reflector in the lens assembly according to the vibration parameters specifically includes: Determine, according to the vibration parameter, an offset parameter of the field angle range of the second lens unit relative to the target area during the process of the lens assembly photographing the target area, wherein the offset parameter includes at least one of an offset frequency and an offset angle; The rotation parameters of the reflector are determined according to the offset parameters.

14. The control method according to claim 13, characterized in that: The controlling the reflector to rotate the preset angle relative to the second lens unit so that the field of view angle range of the second lens unit matches the target area specifically includes: When the field of view angle range of the second lens unit is offset relative to the target area, the reflector is controlled to rotate along the central axis on its own mirror surface relative to the second lens unit by the preset angle, so that the field of view angle range of the second lens unit moves toward a first direction and matches the target area; wherein the first direction is opposite to the offset direction of the field of view angle range of the second lens unit.

15. The control method according to claim 14, characterized in that: The central rotation axis includes a first rotation axis and a second rotation axis, the preset angle includes a first preset angle and a second preset angle, and the offset direction includes at least one of a first offset direction and a second offset direction; The step of controlling the reflector to rotate the preset angle around the central axis on its mirror surface relative to the second lens unit specifically includes: When the field of view angle range of the second lens unit shifts relative to the target area toward the first shift direction, controlling the reflector to rotate relative to the second lens unit around the first rotation axis by the first preset angle; When the viewing angle range of the second lens unit shifts toward the second shift direction relative to the target area, the reflector is controlled to rotate around the second rotation axis relative to the second lens unit at the second preset angle.

16. The control method according to any one of claims 12 to 15, characterized in that: The rotation parameter also includes a rotation frequency, and the rotation frequency matches the frequency of the vibration parameter.

17. A camera module, characterized in that: The lens assembly comprises an image sensor and the lens assembly as claimed in any one of claims 1 to 11, wherein the image sensor is located at the image side of the second lens unit in the lens assembly.

18. An electronic device, characterized in that: It comprises a shell and a camera module as described in claim 17, wherein the camera module is located in a receiving space of the shell.

Images