Camera module and electronic equipment

Abstract

The utility model provides a camera module and electronic equipment. The camera module comprises an image sensor, a metasurface lens and a support. The support comprises a first part and a second part which are movably connected, the metasurface lens is assembled at a first axial position of the first part, and the image sensor is assembled at a second axial position of the second part. The first portion includes a first end remote from the second portion, and the second portion includes a second end remote from the first portion. The stent includes a folded state in which a distance between the first end and the second end is less than a focal length, and an unfolded state in which a distance between the first axial position and the second axial position is equal to the focal length. The support can be switched between the folded state and the unfolded state through the relative movement of the first part and the second part, the focusing function can be achieved in the using state, and occupied space in the non-using state is reduced.

Description

Technical Field

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

[0002] Metasurface lens is a new type of micro-nano component that can realize lens functions, but its size is much smaller than that of traditional lenses. Therefore, when metasurface lens is applied to camera module, it reduces the space occupied by camera module based on the thickness advantage of the body structure.

[0003] However, due to the focal length, the camera module containing the metasurface lens still has a large size requirement in the optical axis direction, which affects the lightness and aesthetics of the electronic device. Utility Model Content

[0004] The present invention provides a camera module and an electronic device to solve related technical problems.

[0005] A first aspect of the present disclosure provides a camera module, comprising:

[0006] Image sensor;

[0007] Metasurface lens;

[0008] A bracket comprises a first part and a second part which are movably connected, wherein the metasurface lens is assembled at a first axial position of the first part, and the image sensor is assembled at a second axial position of the second part; the first part comprises a first end away from the second part, and the second part comprises a second end away from the first part; the bracket comprises a folded state in which the distance between the first end and the second end is less than the focal length, and an unfolded state in which the distance between the first axial position and the second axial position is equal to the focal length.

[0009] Optionally, the metasurface lens includes at least one substrate and a plurality of microstructures disposed on at least one side of the substrate.

[0010] Optionally, the material of the substrate includes one of silicon dioxide, glass, and sapphire;

[0011] And / or, the material of the microstructure includes one of silicon nitride, gallium nitride, titanium oxide, gallium phosphide, and silicon.

[0012] Optionally, the metasurface lens is assembled at the first end, and the image sensor is assembled at the second end.

[0013] Optionally, the bracket further includes a third part disposed between the first part and the second part; the first part and / or the second part are movably connected to the third part.

[0014] Optionally, the camera module further includes a first driving mechanism, and an output end of the first driving mechanism is connected to the first part and / or the second part.

[0015] Optionally, the camera module further includes a second driving mechanism; the metasurface lens is movably connected to the first part, and an output end of the second driving mechanism is connected to the metasurface lens.

[0016] Optionally, the camera module further includes a third driving mechanism; the image sensor is movably connected to the second part, and an output end of the third driving mechanism is connected to the image sensor.

[0017] Optionally, the movement direction of the output end of the third driving mechanism includes a first direction parallel to the optical axis and / or a second direction perpendicular to the optical axis.

[0018] According to a second aspect of the present disclosure, an electronic device is provided, comprising: any camera module described in the first aspect.

[0019] The technical solution provided by the present disclosure can at least achieve the following beneficial effects:

[0020] The bracket of the camera module disclosed in the present invention includes a first part and a second part that are movably connected. The bracket can switch between a folded state and an unfolded state by the relative movement of the first part and the second part, and can realize the focusing function in the use state and reduce the space occupied in the non-use state. When the bracket is in the folded state, the distance between the first end of the first part and the second end of the second part is less than the folded state of the focal length, and the thickness of the bracket in the optical axis direction is reduced to reduce the space occupied by the camera module. When the bracket is in the unfolded state, the distance between the first axial position where the metasurface lens is installed and the second axial position where the image sensor is installed is equal to the focal length, so as to provide a structural basis for the focusing function of the camera module.

[0021] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present specification. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the specification and, together with the description, serve to explain the principles of the specification.

[0023] Figure 1 is a schematic cross-sectional structure diagram of a camera module in an exemplary embodiment of the present disclosure when the bracket is in a folded state;

[0024] Figure 2is a schematic cross-sectional structure diagram of a camera module in an exemplary embodiment of the present disclosure when the bracket is in an unfolded state;

[0025] Figure 3 is a schematic diagram of a three-dimensional structure of a camera module in an exemplary embodiment of the present disclosure when the bracket is in an unfolded state;

[0026] Figure 4 is a partial structural schematic diagram of a camera module in an exemplary embodiment of the present disclosure;

[0027] Figure 5 is a schematic diagram of a three-dimensional structure of a metasurface structure in an exemplary embodiment of the present disclosure;

[0028] Figure 6 It is one of the cross-sectional structural schematic diagrams of a camera module in an exemplary embodiment of the present disclosure;

[0029] Figure 7 is a schematic cross-sectional structure diagram of a camera module in another exemplary embodiment of the present disclosure when the bracket is in a folded state;

[0030] Figure 8 is a schematic cross-sectional structural diagram of a camera module in another exemplary embodiment of the present disclosure when the bracket is in an unfolded state;

[0031] Fig. 9 This is a second schematic cross-sectional structure diagram of a camera module in an exemplary embodiment of the present disclosure;

[0032] Fig.10 This is a third schematic diagram of a cross-sectional structure of a camera module in an exemplary embodiment of the present disclosure;

[0033] Fig.11 This is a fourth schematic diagram of a cross-sectional structure of a camera module in an exemplary embodiment of the present disclosure;

[0034] Fig.12 It is a structural block diagram of a camera module in an exemplary embodiment of the present disclosure. DETAILED DESCRIPTION

[0035] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementations described in the following exemplary embodiments do not represent all implementations consistent with this specification. Instead, they are merely examples of devices and methods consistent with some aspects of this specification as detailed in the appended claims.

[0036] The terms used in this disclosure are only for the purpose of describing specific embodiments and are not intended to limit the disclosure. Unless otherwise defined, the technical terms or scientific terms used in this specification should be understood by people with ordinary skills in the field to which the disclosure belongs. The words "first", "second" and similar words used in this specification and claims do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one" or "one" do not indicate a quantitative limit, but indicate the existence of one. "Multiple" or "several" means two and more than two. Unless otherwise specified, words such as "front", "rear", "lower" and / or "upper" are only for the convenience of explanation and are not limited to one position or one spatial orientation. Words such as "include" or "comprise" mean that the elements or objects appearing in front of "include" or "comprise" include the elements or objects listed after "include" or "comprise" and their equivalents, and do not exclude other elements or objects. Words such as "connect" or "connected" are not limited to physical or mechanical connections, and can include electrical connections, whether direct or indirect.

[0037] The terms used in this specification are for the purpose of describing specific embodiments only and are not intended to limit the present disclosure. The singular forms of "a", "the" and "the" used in this specification and the appended claims are also intended to include plural forms unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0038] Metasurface lenses are a new type of micro-nano element that can realize lens functions, but their size is much smaller than traditional lenses. Therefore, when metasurface lenses are applied to camera modules, the space occupied by the camera modules is reduced based on the thickness advantage of the fuselage structure. However, due to the existence of focal length, the size requirements of camera modules containing metasurface lenses in the optical axis direction are still large, which affects the lightness and aesthetics of electronic devices.

[0039] The present disclosure provides a camera module. Figure 1 is a schematic cross-sectional structure diagram of a camera module in an exemplary embodiment of the present disclosure when the bracket is in a folded state. Figure 2 is a schematic cross-sectional structure diagram of a camera module in an exemplary embodiment of the present disclosure when the bracket is in an unfolded state. Figure 3 FIG. 1 is a schematic diagram of a three-dimensional structure of a camera module in an exemplary embodiment of the present disclosure when the bracket is in an unfolded state. Figure 1-Figure 3As shown, the dot-dash line represents the direction of the optical axis, and the camera module 1 includes an image sensor 12, a metasurface lens 11, and a bracket 13. The bracket 13 includes a first portion 131 and a second portion 132 that are movably connected, the metasurface lens 11 is assembled at a first axial position of the first portion 131, and the image sensor 12 is assembled at a second axial position of the second portion 132. The first portion 131 includes a first end 1311 away from the second portion 132, and the second portion 132 includes a second end 1321 away from the first portion 131. The bracket 13 includes a folded state in which the distance between the first end 1311 and the second end 1321 is less than the focal length, and an unfolded state in which the distance between the first axial position and the second axial position is equal to the focal length.

[0040] Since the bracket 13 of the camera module 1 includes a first part 131 and a second part 132 that are movably connected, the bracket 13 can switch between a folded state and an unfolded state by the relative movement of the first part 131 and the second part 132, so that the focusing function can be realized in the use state and the space occupied in the non-use state is reduced. When the bracket 13 is in the folded state, the distance between the first end 1311 of the first part 131 and the second end 1321 of the second part 132 is less than the folded state of the focal length, and the thickness of the bracket 13 in the optical axis direction is reduced to reduce the space occupied by the camera module 1. When the bracket 13 is in the unfolded state, the distance between the first axial position where the metasurface lens 11 is installed and the second axial position where the image sensor 12 is installed is equal to the focal length, so as to provide a structural basis for the focusing function of the camera module 1.

[0041] like Figure 4 , Figure 5 As shown, the metasurface lens 11 includes a substrate 111 and a microstructure 112. The principle of the metasurface lens 11 is based on the precise control of the light wave by its microstructure 112. The microstructure 112 can effectively adjust the phase and amplitude of the incident light, thereby realizing the focusing, imaging and wavefront modulation of the light wave. Among them, the microstructure 112 can refer to a structure with a size order of micrometer or nanometer. In some embodiments, the metasurface lens 11 includes at least one substrate 111 and a plurality of microstructures 112 arranged on at least one side of the substrate 111, so as to realize the light regulation function of the metasurface lens 11 through the microstructure 112. Among them, the microstructure 112 can be arranged on the same side of the substrate 111 to reduce the processing difficulty and thickness. Alternatively, the microstructure 112 can also be arranged on both sides of the substrate 111 to enhance the light regulation effect. For example, the microstructure 112 can be arranged on the side of the substrate 111 facing the incident light source.

[0042] The phase distribution on the surface of the superlens is as follows:

[0043]

[0044] Among them, A i is the coefficient variable, i corresponds to different working wavelengths; r is the distance between a certain point on the metalens and the center of the circle. For the visible light band, 400nm-700nm, each wavelength corresponds to an A i The coefficient value corresponds to different phase distributions. By precisely designing the size of the microstructure 112 unit on the metasurface lens 11, different wavelengths have different responses when incident to meet the phase distribution of different wavelengths, thereby achieving achromatic visible light imaging. The main body of the metasurface lens 11 is a nano-pillar microstructure 112, which is arranged periodically. The period is the distance between the centers of two adjacent pillars, and the period can be between 200nm-400nm. The height of the nano-pillar can be between 300nm-700nm. When the nano-pillar is a cylinder, the diameter can be between 50nm-200nm.

[0045] It should be noted that the material of the substrate 111 includes one of silicon dioxide, glass, and sapphire. The material of the microstructure 112 includes one of silicon nitride, gallium nitride, titanium oxide, gallium phosphide, and silicon.

[0046] In some embodiments, the metasurface lens 11 is assembled at the first end 1311, and the image sensor 12 is assembled at the second end 1321. The metasurface lens 11 and the image sensor 12 are assembled at the opposite ends of the first part 131 and the second part 132 to effectively utilize the length of the first part 131 and the second part 132, reduce the space occupied by the camera module 1, and facilitate the assembly of the metasurface lens 11 and the image sensor 12. At this time, the focal length of the first axial position and the second axial position in the unfolded state is the distance from the first end 1311 to the second end 1321 of the bracket 13 in the unfolded state.

[0047] In other embodiments, the metasurface lens 11 may also be assembled at other axial positions of the first portion 131 , and the image sensor 12 may also be assembled at other axial positions of the second portion 132 .

[0048] In some embodiments, the bracket 13 may include only a first portion 131 and a second portion 132 to form a two-stage folding structure. When the bracket 13 is in a folded state, at least a portion of the first portion 131 and the second portion 132 in the optical axis direction may overlap so that the distance between the first end 1311 and the second end 1321 is less than the focal length. For example, the diameter of the first portion 131 may be less than the diameter of the second portion 132, and is accommodated in the accommodation space formed by the second portion 132 in the folded state. When the bracket 13 needs to switch from the folded state to the unfolded state, the first portion 131 and / or the second portion 132 moves in the optical axis direction until the distance between the first axial position and the second axial position is equal to the focal length to achieve focus shooting. When the bracket 13 needs to switch from the unfolded state to the folded state, the first portion 131 and / or the second portion 132 moves in the optical axis direction so that the distance between the first end 1311 and the second end 1321 is less than the focal length.

[0049] In the above embodiment, if Figure 6 As shown, the camera module 1 may further include a first driving mechanism 15 , and an output end of the first driving mechanism 15 is connected to the first part 131 and / or the second part 132 to drive the first part 131 and / or the second part 132 to move.

[0050] For example, the first driving mechanism 15 is connected to the first part 131. When it is necessary to take a photo, the chip component sends a command to control the output end to stretch the bracket 13 and push the lens away from the image sensor 12. At the same time, the Hall sensor detects the position of the metasurface lens 11 through a signal. When the predetermined distance is reached, a signal is sent back to the chip component, and then the output end of the first driving mechanism 15 is controlled to stop through a command. After the photo is taken, the chip component sends a command, and the output end of the first driving mechanism 15 can retract the bracket 13, and the metasurface lens 11 and the image sensor 12 are folded together to form an ultra-thin module structure.

[0051] In other embodiments, Figure 7 , Figure 8As shown, the bracket 13 also includes a third part 133 disposed between the first part 131 and the second part 132 to form a three-stage folding structure. The first part 131 and / or the second part 132 are movably connected to the third part 133 so that the first part 131, the second part 132 and the third part 133 can be sequentially unfolded in the direction of the optical axis, which helps to increase the focal length. The first part 131, the second part 132 and the third part 133 can also be retracted and folded in the direction of the optical axis to reduce the thickness of the bracket 13. For example, in the folded state, at least a portion of the first part 131 can be accommodated in the accommodation space formed by the third part 133, and at least a portion of the third part 133 can also be accommodated in the accommodation space formed with the second part 132, so that the distance between the first end 1311 and the second end 1321 is less than the focal length, thereby achieving folding.

[0052] In this embodiment, the output end of the first driving mechanism 15 of the camera module 1 is connected to at least two of the first part 131, the second part 132, and the third part 133 to drive at least two of the first part 131, the second part 132, and the third part 133 to move.

[0053] In some embodiments, Fig. 9 As shown, the camera module 1 may include a second driving mechanism 16, the metasurface lens 11 is movably connected to the first part 131, and the output end of the second driving mechanism 16 is connected to the metasurface lens 11 to utilize the movement of the metasurface lens relative to the first part 131 to achieve anti-shake and / or auxiliary focusing functions.

[0054] The movement direction of the output end of the second driving mechanism 16 includes a first direction parallel to the optical axis and / or a second direction perpendicular to the optical axis. When the output end of the second driving mechanism 16 moves along the first direction, it can cooperate with the relative movement of the first part 131 and the second part 132 to achieve fine focus. Among them, the movement accuracy of the second driving mechanism 16 can be higher than that of the first driving mechanism 15, so that after the first driving mechanism 15 pushes the metasurface lens 11 to a suitable position from the image sensor 12, the second driving mechanism 16 accurately adjusts the relative position of the metasurface lens 11 and the image sensor 12 to achieve fine focus. When the output end of the second driving mechanism 16 moves along the first direction and / or the second direction, an anti-shake function can be achieved.

[0055] In other embodiments, Fig.10 As shown, the camera module 1 may include a third driving mechanism 17, the image sensor 12 is movably connected to the second part 132, and the output end of the third driving mechanism 17 is connected to the image sensor 12 to utilize the movement of the image sensor 12 relative to the second part 132 to achieve anti-shake and / or auxiliary focusing functions.

[0056] The movement direction of the output end of the third driving mechanism 17 includes a first direction parallel to the optical axis and / or a second direction perpendicular to the optical axis. When the output end of the third driving mechanism 17 moves along the first direction, it can cooperate with the relative movement of the first part 131 and the second part 132 to achieve fine focus. Among them, the movement accuracy of the third driving mechanism 17 can be higher than that of the first driving mechanism 15, so that after the first driving mechanism 15 pushes the metasurface lens 11 to a suitable position from the image sensor 12, the third driving mechanism 17 accurately adjusts the relative position of the metasurface lens 11 and the image sensor 12 to achieve fine focus. When the output end of the third driving mechanism 17 moves along the first direction and / or the second direction, an anti-shake function can be achieved.

[0057] It should be noted that if Fig.11 , Fig.12 As shown, the camera module 1 can simultaneously have a first driving mechanism 15, a second driving mechanism 16 and a third driving mechanism 17, the metasurface lens 11 is movably connected to the first part 131, and the image sensor 12 is movably connected to the second part 132. Through the comprehensive control of the chip component and the Hall sensor, the focusing, fine focusing and anti-shake functions in the above embodiments can be realized.

[0058] The first drive mechanism 15, the second drive mechanism 16 and the third drive mechanism 17 can be drivers such as motors for controlling the extension and compression of the bracket 13. When taking pictures is not needed, the bracket 13 is in a folded state. Since the metasurface lens 11 is extremely light and thin, the entire camera module 1 can be compressed to a state with extremely low thickness, which saves a lot of space for the whole machine and solves the problem of the camera protruding from the body of the electronic device 2. When taking pictures is needed, the driver pushes the bracket 13 to extend, and controls the distance between the metasurface lens 11 and the image sensor 12 according to the chip instructions to complete the focus shooting. After taking pictures, the bracket 13 can be recycled and folded, realizing an ultra-light and thin camera module 1, which helps to improve the lightness and aesthetics of the electronic device 2.

[0059] In addition, the first driving mechanism 15, the second driving mechanism 16 and the third driving mechanism 17 may include a driving part and a transmission part, and the transmission part is connected to the first part 131, the second part 132, the third part 133, the metasurface lens 11 and the image sensor 12. The driving part includes a voice coil motor, a piezoelectric ceramic motor or a stepping motor. The transmission part includes a gear set, a lead screw structure, etc.

[0060] Furthermore, the camera module 1 may further include an aperture 14, for example Figure 4 Above the metasurface lens 11 is a circular aperture 14 for controlling the total amount of light incident on the lens.

[0061] The present disclosure further provides an electronic device 2, which includes the camera module 1 mentioned above.

[0062] Since the bracket 13 of the camera module 1 includes a first part 131 and a second part 132 that are movably connected, the bracket 13 can be switched between a folded state and an unfolded state by the relative movement of the first part 131 and the second part 132, so that the focusing function can be realized in the use state and the space occupied in the non-use state is reduced. When the bracket 13 is in the folded state, the distance between the first end 1311 of the first part 131 and the second end 1321 of the second part 132 is less than the folded state of the focal length, and the thickness of the bracket 13 in the optical axis direction is reduced to reduce the space occupied by the camera module 1. When the bracket 13 is in the folded state, the end of the camera module 1 facing the incident light source can be flush with the housing of the electronic device 2 to enhance the aesthetics of the electronic device 2. When the bracket 13 is in the unfolded state, the distance between the first axial position where the metasurface lens 11 is installed and the second axial position where the image sensor 12 is installed is equal to the focal length, so as to provide a structural basis for the focusing function of the camera module 1.

[0063] It should be noted that the electronic device 2 may be a mobile phone, a tablet computer, a wearable device, a vehicle-mounted terminal, a medical terminal, etc., and the present disclosure does not limit this.

[0064] The above is only a preferred embodiment of the present disclosure and does not limit the present disclosure in any form. Although the present disclosure has been disclosed as a preferred embodiment as above, it is not used to limit the present disclosure. Any technician familiar with this profession can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present disclosure. However, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present disclosure without departing from the content of the technical solution of the present disclosure are still within the scope of the technical solution of the present disclosure.

Claims

1. A camera module, characterized in that: include: Image sensor; Metasurface lens; A bracket comprises a first part and a second part which are movably connected, wherein the metasurface lens is assembled at a first axial position of the first part, and the image sensor is assembled at a second axial position of the second part; the first part comprises a first end away from the second part, and the second part comprises a second end away from the first part; the bracket comprises a folded state in which the distance between the first end and the second end is less than the focal length, and an unfolded state in which the distance between the first axial position and the second axial position is equal to the focal length.

2. The camera module according to claim 1, characterized in that: The metasurface lens includes at least one substrate and a plurality of microstructures disposed on at least one side of the substrate.

3. The camera module according to claim 2, characterized in that: The material of the substrate includes one of silicon dioxide, glass and sapphire; And / or, the material of the microstructure includes one of silicon nitride, gallium nitride, titanium oxide, gallium phosphide, and silicon.

4. The camera module according to claim 1, characterized in that: The metasurface lens is assembled at the first end, and the image sensor is assembled at the second end.

5. The camera module according to claim 1, characterized in that: The bracket further includes a third part arranged between the first part and the second part; the first part and / or the second part is movably connected to the third part.

6. The camera module according to claim 1, characterized in that: It also includes a first driving mechanism, wherein an output end of the first driving mechanism is connected to the first part and / or the second part.

7. The camera module according to claim 1, characterized in that: It also includes a second driving mechanism; the metasurface lens is movably connected to the first part, and the output end of the second driving mechanism is connected to the metasurface lens.

8. The camera module according to claim 1, characterized in that: It also includes a third driving mechanism; the image sensor is movably connected to the second part, and the output end of the third driving mechanism is connected to the image sensor.

9. The camera module according to claim 8, characterized in that: The movement direction of the output end of the third driving mechanism includes a first direction parallel to the optical axis and / or a second direction perpendicular to the optical axis.

10. An electronic device, characterized in that: include: A camera module as described in any one of claims 1 to 9.

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