Camera module and terminal equipment

Abstract

The utility model relates to a camera module and terminal equipment, and belongs to the technical field of optical imaging. The camera module comprises a first prism, a first lens group, a second lens group, a first driving mechanism and an image sensor; the first prism is provided with a first object side face and a first image side face which are perpendicular to each other, the first lens group is located on the light inlet side of the first object side face, the second lens group is located on the light outlet side of the first image side face, and the image sensor is located on the light outlet side of the second lens group; the first driving mechanism is used for moving the second lens group so as to adjust the distance between the second lens group and the first image side surface. According to the invention, the focal length of the camera module can be adjusted in a physical zooming mode, so that the quality of an image finally presented by the camera module is improved.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the field of optical imaging technology, and in particular, to a camera module and a terminal device. BACKGROUND

[0002] With the continuous development of optical imaging technology, the types of camera modules applied to terminal devices such as mobile phones are becoming more and more widespread. In terminal devices such as mobile phones, due to the size limitation in the thickness direction, periscopic lenses are mostly arranged to meet the long-distance shooting needs of consumers.

[0003] At present, the zoom mode of the periscopic lens camera module is usually digital zoom.

[0004] However, digital zoom uses a specific algorithm to reassign pixels to the image, simulating the effect of optical zoom, which will reduce the quality of the final presented image. UTILITY MODEL CONTENT

[0005] The present disclosure provides a camera module and a terminal device, which can solve the technical problems existing in the related art. The technical solutions of the camera module and the terminal device are as follows:

[0006] In a first aspect, the present disclosure provides a camera module, which includes a first prism, a first lens group, a second lens group, a first driving mechanism, and an image sensor.

[0007] The first prism has a first object side and a first image side perpendicular to each other, the first lens group is located on the light entrance side of the first object side, the second lens group is located on the light exit side of the first image side, and the image sensor is located on the light exit side of the second lens group.

[0008] The first driving mechanism is configured to move the second lens group to adjust the distance between the second lens group and the first image side.

[0009] In a possible implementation, the second lens group includes a first lens and a second lens, and the first lens and the second lens are arranged in sequence on the light exit side of the first image side.

[0010] The first driving mechanism is configured to move the first lens and the second lens respectively to adjust the distance between the first lens and the first image side and the distance between the second lens and the first image side respectively.

[0011] In a possible implementation, the first lens group includes a third lens and a fourth lens, and the third lens and the fourth lens are arranged in sequence on the light entrance side of the first object side.

[0012] The camera module further comprises a second driving mechanism for moving the third lens and the fourth lens respectively to adjust the distance between the third lens and the first object side and the distance between the fourth lens and the first object side respectively.

[0013] In a possible implementation, the moving stroke of the third lens and the fourth lens is not greater than 500 microns.

[0014] In a possible implementation, the camera module further comprises a second prism having a second object side and a second image side perpendicular to each other.

[0015] The second lens group is located on the light-incoming side of the second object side, and the image sensor is located on the light-outgoing side of the second image side.

[0016] In a possible implementation, the first object side and the second image side are in the same direction.

[0017] In a possible implementation, the camera module further comprises a frame body, which is a hollow cuboid structure, and the top wall of the frame body has a first light-transmitting region and a second light-transmitting region.

[0018] The first prism is fixed in the frame body, and the first object side is arranged opposite to the first light-transmitting region.

[0019] The second prism is fixed in the frame body, and the second image side is arranged opposite to the second light-transmitting region.

[0020] The second lens group is located between the first prism and the second prism.

[0021] The first lens group is located outside the frame body.

[0022] The image sensor is located outside the frame body.

[0023] In a possible implementation, the first driving mechanism is a voice coil motor.

[0024] In a second aspect, the embodiments of the present disclosure provide a terminal device, which comprises the camera module in the first aspect and possible implementation manners thereof.

[0025] In a possible implementation, the terminal device further comprises a power supply module and a control module.

[0026] The power supply module is electrically connected with the first driving mechanism.

[0027] The control module is electrically connected with the power supply module.

[0028] The technical solutions provided by the embodiments of the present disclosure have at least the following beneficial effects.

[0029] The camera module provided by the embodiments of the present disclosure can adjust the distance between the second lens group and the first image side by the first driving mechanism, and can realize physical zoom. In the process of adjusting the second lens group to move towards the first image side, the overall focal length of the camera module increases, which can meet the requirement of long-distance shooting. In the process of adjusting the second lens group to move away from the first image side, the overall focal length of the camera module decreases, which can meet the requirement of close-range shooting. Compared with the digital zoom method in the related art, the technical solutions provided by the embodiments of the present disclosure do not need to perform pixel reallocation on the image, and thus the image quality finally presented by the camera module can be improved.

[0030] It should be understood that the foregoing general description and the following detailed description are only exemplary and explanatory, and cannot limit the present disclosure. BRIEF DESCRIPTION OF DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present disclosure, and other drawings can be obtained by those skilled in the art without creative effort.

[0032] Figure 1 is a structural schematic diagram of a camera module according to an embodiment of the present disclosure;

[0033] Figure 2 is a structural schematic diagram of a camera module according to an embodiment of the present disclosure;

[0034] Figure 3 is a structural schematic diagram of a camera module according to an embodiment of the present disclosure;

[0035] Figure 4 is a structural schematic diagram of a terminal device according to an embodiment of the present disclosure.

[0036] LEGEND

[0037] 1, first prism;

[0038] 101, first object side; 102, first image side;

[0039] 2, first lens group;

[0040] 21, third lens; 22, fourth lens;

[0041] 3, second lens group;

[0042] 31. First lens; 32. Second lens;

[0043] 4. First drive mechanism;

[0044] 5. Image sensor;

[0045] 6. Second drive mechanism;

[0046] 7. Second prism;

[0047] 701. Side view of the second object; 702. Side view of the second image;

[0048] 8. Frame;

[0049] 801, First light-transmitting area; 802, Second light-transmitting area;

[0050] 100. Camera module; 200. Power supply module; 300. Control module. Detailed Implementation

[0051] To make the objectives, technical solutions, and advantages of this disclosure clearer, the embodiments of this disclosure will be described in further detail below with reference to the accompanying drawings.

[0052] This disclosure provides a camera module, such as... Figure 1 As shown, the camera module includes a first prism 1, a first lens group 2, a second lens group 3, a first drive mechanism 4, and an image sensor 5.

[0053] The first prism 1 has a first object side 101 and a first image side 102 that are perpendicular to each other. The first mirror group 2 is located on the light-incident side of the first object side 101, the second mirror group 3 is located on the light-outceasing side of the first image side 102, the image sensor 5 is located on the light-outceasing side of the second mirror group 3, and the first drive mechanism 4 is used to move the second mirror group 3 to adjust the distance between the second mirror group 3 and the first image side 102.

[0054] Specifically, such as Figure 3 As shown, the camera module also includes a frame 8, which is a hollow cubic structure. The top wall of the frame 8 has a first light-transmitting area 801. A first prism 1 is disposed inside the frame 8 and fixedly connected to it. A first drive mechanism 4 is disposed inside the frame 8 and fixedly connected to it. A second lens group 3 is disposed inside the first drive mechanism 4. A first lens group 2 is disposed outside the frame 8 and is arranged opposite to the first light-transmitting area 801.

[0055] For example, the first prism 1 and the first driving mechanism 4 can be bonded to the frame 8 respectively, or they can be snapped to the frame 8 respectively. As for the connection method between the components in the camera module, the technicians can set it according to actual needs. This disclosure does not limit the method.

[0056] Thus, the distance between the second lens group 3 and the first image side surface 102 can be adjusted by the first driving mechanism 4, physical zoom can be achieved, and the overall focal length of the camera module increases during adjustment of the second lens group 3 to move toward the first image side surface 102, which can meet the requirements of long-distance shooting, and the overall focal length of the camera module decreases during adjustment of the second lens group 3 to move away from the first image side surface 102, which can meet the requirements of close-range shooting. Compared with the digital zoom method in the related art, the technical solution provided in the embodiment of the present disclosure does not need to perform pixel reallocation on the image, and thus the image quality finally presented by the camera module can be improved.

[0057] In some possible embodiments, the first driving mechanism 4 is a voice coil motor.

[0058] As shown in Figure 1 The first driving mechanism 4 includes a shell and a coil (not shown), the shell has a receiving cavity, the second lens group 3 is arranged in the receiving cavity, the shape of the receiving cavity can be cylindrical, and the axial direction of the receiving cavity is the direction in which the first image side surface 102 points to the image sensor 5.

[0059] In implementation, by controlling the current flowing through the coil, the magnetic field excited by the coil can be controlled to change, thereby controlling the movement of the second lens group 3 in the first driving mechanism 4, and the movement direction of the second lens group 3 is the direction in which the first image side surface 102 points to the image sensor 5 or the direction in which the image sensor 5 points to the first image side surface 102. As the second lens group 3 gradually approaches the first image side surface 102 (i.e., the distance between the second lens group 3 and the image sensor 5 gradually increases), the overall focal length of the camera module gradually increases, and in the case where the object distance does not change, the image magnification received by the image sensor 5 gradually increases, which can meet the requirements of long-distance shooting of the user. Correspondingly, as the second lens group 3 gradually approaches away from the first image side surface 102 (i.e., the distance between the second lens group 3 and the image sensor 5 gradually decreases), the overall focal length of the camera module gradually decreases, and in the case where the object distance does not change, the image magnification received by the image sensor 5 gradually decreases, which can meet the requirements of close-range shooting of the user. At the same time, since the camera module adjusts the focal length by physical zoom, the image received by the image sensor 5 will not be digitally adjusted, and thus the image quality finally presented by the camera module can be improved.

[0060] In some examples, the second lens group 3 includes a first lens 31 and a second lens 32.

[0061] As shown in Figure 1As shown, the second lens group 3 includes a first lens 31 and a second lens 32. The optical axes of the first lens 31, the second lens 32 and the first image side surface 102 are arranged coaxially, and the first lens 31 and the second lens 32 are arranged sequentially on the light-emitting side of the first image side surface 102.

[0062] Specifically, two coils may be provided inside the housing of the first driving mechanism 4. The two coils are distributed at intervals in the direction of the first image side 102 pointing towards the image sensor 5. One coil is used to drive the first lens 31 to move, and the other coil is used to drive the second lens 32 to move.

[0063] In one example, both the first lens 31 and the second lens 32 are convex lenses.

[0064] Using the technical solution provided in this embodiment, the second lens group 3 includes two lenses: a first lens 31 and a second lens 32. The first driving mechanism 4 can adjust the distance between the first lens 31 and the first image-side surface 102, and the distance between the second lens 32 and the first image-side surface 102, respectively. Thus, as the first lens 31 moves closer to the first image-side surface 102, the overall focal length of the camera module gradually increases. Furthermore, as the second lens 32 moves closer to the first image-side surface 102, the overall focal length of the camera module can be further increased, thereby increasing the upper limit of the magnification of the image received by the image sensor 5.

[0065] In some possible embodiments, the first lens group 2 includes a third lens 21 and a fourth lens 22.

[0066] like Figure 1 As shown, the first lens group 2 includes a third lens 21 and a fourth lens 22. The third lens 21, the fourth lens 22 and the optical axis of the first object side 101 are arranged coaxially, and the third lens 21 and the fourth lens 22 are arranged sequentially on the light-incident side of the first object side 101.

[0067] Furthermore, the camera module also includes a second drive mechanism 6, which is a voice coil motor. The second drive mechanism 6 includes a housing and two coils (not shown). The housing has a receiving cavity, in which the third lens 21 and the fourth lens 22 are respectively disposed. The shape of the receiving cavity can be cylindrical, and the axial direction of the receiving cavity is the optical axis direction of the first object side surface 101. The two coils respectively drive the third lens 21 and the fourth lens 22 to move in the optical axis direction of the first object side surface 101, so as to adjust the distance between the third lens 21 and the first object side surface 101, and the distance between the fourth lens 22 and the first object side surface 101, respectively.

[0068] In implementation, by adjusting the position of the first lens group 2 through the first driving mechanism 4, the overall focal length of the camera module can be adjusted, so that the size of the image received by the image sensor 5 changes, and in this process, focusing needs to be achieved by moving the first lens group 2 to ensure the sharpness of the image received by the image sensor 5.

[0069] By adopting the technical solutions provided in the embodiments of the present disclosure, the second driving mechanism 6 can control the third lens 21 and the fourth lens 22 to move in the optical axis direction of the first object side 101 (i.e., the thickness direction of the camera module) respectively, so as to complete focusing with a smaller moving stroke, and further, the camera module can be thinner, which is conducive to the miniaturization design of the camera module.

[0070] Exemplarily, the moving stroke of the third lens 21 and the fourth lens 22 is not greater than 500 microns.

[0071] In some possible embodiments, the camera module further includes a second prism 7.

[0072] As shown in Figure 2 , the camera module further includes a second prism 7, the second prism 7 has a second object side 701 and a second image side 702 which are perpendicular to each other, the second lens group 3 is located at the light entrance side of the second object side 701, and the image sensor 5 is located at the light exit side of the second image side 702.

[0073] Specifically, the first image side 102 is arranged opposite to the second object side 701, the second lens group 3 is located between the first image side 102 and the second object side 701, and the first driving mechanism 4 is used to drive the second lens group 3 to move between the first image side 102 and the second object side 701.

[0074] In this way, the optical path between the first lens group 2 and the image sensor 5 can be increased, so as to improve the upper limit of the focal length of the camera module, so that the camera module can be used as a long-focus camera module.

[0075] Further, as shown in Figure 3As shown, the camera module further includes a frame body 8, the frame body 8 is a hollow cube structure, a top wall of the frame body 8 has a first light transmission region 801 and a second light transmission region 802, the first prism 1 is arranged inside the frame body 8 and fixedly connected with the frame body 8, and the first object side 101 is arranged opposite to the first light transmission region 801. The second prism 7 is arranged inside the frame body 8 and fixedly connected with the frame body 8, the second image side 702 is arranged opposite to the second light transmission region 802 and fixedly connected with the frame body 8. The second lens group 3 is arranged inside the first driving mechanism 4, the first driving mechanism 4 is arranged inside the frame body 8 and located between the first image side 102 and the second object side 701. The first lens group 2 and the image sensor 5 are arranged outside the frame body 8 respectively, the first lens group 2 is arranged opposite to the first light transmission region 801, and the image sensor 5 is arranged opposite to the second light transmission region 802.

[0076] By arranging the second prism 7 between the second lens group 3 and the image sensor 5 and arranging the image sensor 5 outside the frame body 8, the upper limit of the focal length of the camera module can be further improved.

[0077] Optionally, for the first prism 1 and the second prism 7, the first object side 101 and the second image side 702 can be arranged in the same direction.

[0078] In this way, the image sensor 5 is arranged on the light-out side of the second image side 702, the first lens group 2 is arranged on the light-in side of the first object side 101, and the image sensor 5 and the first lens group 2 are located on the same side in the thickness direction of the camera module, and thus the camera module can be made thinner, which is beneficial to the miniaturization design of the camera module.

[0079] The technical scheme provided by the embodiment of the present disclosure at least has the following beneficial effects:

[0080] The camera module provided by the embodiment of the present disclosure can adjust the distance between the second lens group 3 and the first image side 102 through the first driving mechanism 4, and can realize physical zoom. In the process of adjusting the second lens group 3 to move towards the first image side 102, the overall focal length of the camera module increases, which can meet the demand of long-distance shooting. In the process of adjusting the second lens group 3 to move away from the first image side 102, the overall focal length of the camera module decreases, which can meet the demand of close-range shooting. Compared with the digital zoom method in the related art, the technical scheme provided by the embodiment of the present disclosure does not need to re-allocate pixels of an image, and thus the image quality finally presented by the camera module can be improved.

[0081] The terminal device provided by the embodiment of the present disclosure includes the camera module 100 described above. As Figure 4As shown, the terminal device further comprises a power supply module 200 and a control module 300, the power supply module 200 is electrically connected with the first driving mechanism 4, and the control module 300 is electrically connected with the power supply module 200.

[0082] The power supply module 200 is configured to supply power for the first driving mechanism 4, and in the case that the first driving mechanism 4 is a voice coil motor, the power supply module 200 is configured to supply current for a coil in the voice coil motor. The control module 300 is electrically connected with the power supply module 200, and is configured to control the size and direction of the current flowing through the coil in the voice coil motor based on the focal length adjustment instruction, so as to adjust the distance between the second lens group 3 and the first image side surface 102.

[0083] In the embodiments of the present disclosure, the terminal device can be a smart phone, a tablet computer, a notebook computer, or other electronic devices with communication functions, and the specific technology and specific device form adopted by the terminal device are not limited in the present disclosure.

[0084] In the description of the present disclosure, the description of the terms "some embodiments", "one embodiment", "some embodiments", "illustrative embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiments or examples are included in at least one embodiment or example of the present disclosure.

[0085] It can be understood that "multiple" in the present disclosure means two or more, and other quantifiers are similar. The association relationship of the associated objects is described, which means that there can be three relationships, for example, A and / or B can represent three cases of A alone, A and B together, and B alone. The character " / " generally represents an "or" relationship between the associated objects before and after it. The singular form of "one", "said" and "the" is also intended to include the plural form, unless the context clearly indicates otherwise.

[0086] It can be further understood that the terms "first", "second", and the like are used to describe various information, but these information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other, and do not represent a specific order or importance. In fact, the expressions of "first", "second", and the like can be completely interchangeable. For example, the first information can also be referred to as the second information, and similarly, the second information can also be referred to as the first information without departing from the scope of the present disclosure.

[0087] It should be further understood that the terms "center", "longitudinal", "lateral", "front", "back", "up", "down", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are used to indicate the orientation on the drawings as presented in the application and are not meant to limit or confuse the scope of the application to a particular orientation, configuration or operation of the devices or elements being referred to.

[0088] It should be further understood that the terms "mounting", "connecting", "connecting", "fixing" and the like should be interpreted broadly, for example, they can be fixed connection, can also be detachable connection, or integral molding; can be mechanical connection, can also be electrical connection or can communicate with each other; can be direct connection between the two without other components, can also be indirect connection through intermediate media, can be internal communication of two elements or interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present disclosure can be understood according to the specific circumstances.

[0089] It should be further understood that although the operations in the embodiments of the present disclosure are described in a specific order in the drawings, it should not be understood as requiring the specific order or serial order shown, or requiring all the operations shown to obtain the desired results. In a specific environment, multitasking and parallel processing can be advantageous.

[0090] Other embodiments of the present disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the aspects disclosed herein. The present disclosure is intended to cover any variations, uses or adaptations of the present disclosure following, in general, the principles of the present disclosure and including such departures from the present disclosure that come within known or customary practice within the art to which the present disclosure pertains. The specification and examples are to be regarded as illustrative only, and the true scope and spirit of the present disclosure are indicated by the following claims.

[0091] It should be understood that the present disclosure is not limited to the precise structures described and shown in the drawings, and various modifications and changes can be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A camera module, comprising: The camera module comprises a first prism (1), a first lens group (2), a second lens group (3), a first driving mechanism (4) and an image sensor (5); The first prism (1) has a first object side (101) and a first image side (102) which are perpendicular to each other, the first lens group (2) is located on the light entrance side of the first object side (101), the second lens group (3) is located on the light exit side of the first image side (102), and the image sensor (5) is located on the light exit side of the second lens group (3); The first driving mechanism (4) is used for moving the second lens group (3) to adjust the distance between the second lens group (3) and the first image side (102).

2. The camera module of claim 1, wherein, The second lens group (3) comprises a first lens (31) and a second lens (32), and the first lens (31) and the second lens (32) are arranged in sequence on the light exit side of the first image side (102); The first driving mechanism (4) is used for moving the first lens (31) and the second lens (32) respectively to adjust the distance between the first lens (31) and the first image side (102) and the distance between the second lens (32) and the first image side (102) respectively.

3. The camera module of claim 1, wherein, The first lens group (2) comprises a third lens (21) and a fourth lens (22), and the third lens (21) and the fourth lens (22) are arranged in sequence on the light entrance side of the first object side (101); The camera module further comprises a second driving mechanism (6), and the second driving mechanism (6) is used for moving the third lens (21) and the fourth lens (22) respectively to adjust the distance between the third lens (21) and the first object side (101) and the distance between the fourth lens (22) and the first object side (101) respectively.

4. The camera module of claim 3, wherein, The moving stroke of the third lens (21) and the fourth lens (22) is not greater than 500 microns.

5. The camera module of claim 1, wherein, The camera module further comprises a second prism (7), and the second prism (7) has a second object side (701) and a second image side (702) which are perpendicular to each other; The second lens group (3) is located on the light entrance side of the second object side (701), and the image sensor (5) is located on the light exit side of the second image side (702).

6. The camera module of claim 5, wherein, The first object side (101) and the second image side (702) are in the same direction.

7. The camera module of claim 6, wherein, The camera module further comprises a frame body (8), and the frame body (8) is a hollow cuboid structure, the top wall of the frame body (8) has a first light transmission area (801) and a second light transmission area (802); The first prism (1) is fixed in the frame body (8), and the first object side (101) is arranged opposite to the first light transmission area (801); The second prism (7) is fixed in the frame body (8), and the second image side (702) is arranged opposite to the second light transmission area (802); The second lens group (3) is located between the first prism (1) and the second prism (7); The first lens group (2) is located outside the frame body (8). The image sensor (5) is located outside the frame body (8).

8. The camera module of any one of claims 1 to 7, wherein, The first driving mechanism (4) is a voice coil motor.

9. A terminal device, comprising: The terminal device comprises the camera module (100) according to any one of claims 1 to 8.

10. The terminal device according to claim 9, characterized by The terminal device further comprises a power supply module (200) and a control module (300); The power supply module (200) is electrically connected with the first driving mechanism (4); The control module (300) is electrically connected with the power supply module (200).

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