Camera module and terminal device

Abstract

The application provides a camera module and a terminal device. In the camera module, the first optical lens assembly and the second optical lens assembly can be used for receiving light from an object; the first light path folding element and the third light path folding element are arranged on the two sides of the second light path folding element; the first light path folding element and the second light path folding element cooperate to fold the light path of the light from the first optical lens assembly and focus the light to the first image sensor; the third light path folding element and the second light path folding element cooperate to fold the light path of the light from the second optical lens assembly and focus the light to the second image sensor. The first light path folding element and the third light path folding element share one second light path folding element, so that the light path of the light from the first optical lens assembly and the light path of the light from the second optical lens assembly can be folded respectively, which is beneficial to reducing the volume of the camera module.

Description

Technical Field

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

[0002] With the development of technology, mobile phones and other electronic devices are integrating more and more functions, including photography. Furthermore, users' requirements for mobile phones and other electronic devices are gradually increasing. For example, they want to have higher optical zoom, higher image quality, and be thinner and lighter.

[0003] Currently, two or more lenses are used in combination to improve image quality. However, in order to obtain a higher optical zoom, each lens needs to be equipped with a functional component that can fold the optical path. As a result, the camera module is large, the internal space of the electronic device is underutilized, and it is not conducive to achieving a thinner and lighter design. Summary of the Invention

[0004] This application provides a camera module and terminal device to reduce the size of the camera module and facilitate the miniaturization of the terminal device.

[0005] In a first aspect, a camera module is provided, which can be applied to terminal devices such as mobile phones, tablets, or PDAs, and includes: a first optical lens assembly, a second optical lens assembly, a light adjustment assembly, a first image sensor, and a second image sensor; wherein, both the first and second optical lens assemblies can be used to receive light from a photographed object; the light adjustment assembly includes a first optical path folding element, a second optical path folding element, and a third optical path folding element, with the first and third optical path folding elements arranged on both sides of the second optical path folding element; the first and second optical path folding elements cooperate to fold the light from the first optical lens assembly and focus the light onto the first image sensor; the third and second optical path folding elements cooperate to fold the light from the second optical lens assembly and focus the light onto the second image sensor. The first and third optical path folding elements share a single second optical path folding element, which allows for optical path folding of light from the first and second optical lens assemblies respectively, without the need to pair a separate optical path folding element for each of the first and third optical path folding elements. This helps to reduce the size of the camera module.

[0006] There are multiple ways in which the first optical path folding element and the second optical path folding element cooperate to fold the light path. In a specific feasible implementation, the first optical path folding element has M1 first reflective surfaces, all of which face the second optical path folding element. The second optical path folding element has M2 second reflective surfaces, all of which face the first optical path folding element. The light from the first optical lens assembly is reflected between the M1 first reflective surfaces and the M2 second reflective surfaces to fold the light path, and the folded light is reflected to the first image sensor. There are several ways in which the second and third optical path folding elements can work together to fold the light path. In one specific implementation, the second optical path folding element includes M3 third reflective surfaces, all of which face the third optical path folding element. The third optical path folding element includes M4 fourth reflective surfaces, all of which face the second optical path folding element. Light from the second optical lens assembly is reflected between the M3 third reflective surfaces and the M4 fourth reflective surfaces to fold the light path, and the folded light is reflected to the second image sensor. Here, M1, M2, M3, and M4 are all positive integers. Alternatively, the light path can also be folded through refraction.

[0007] In one specific implementation scheme, M1 first reflective surfaces are sequentially connected along the direction away from the first optical lens assembly, and M2 second reflective surfaces are sequentially connected. When M1 ≤ M2, each of the M1 first reflective surfaces is parallel to one of the M2 second reflective surfaces; when M1 > M2, each of the M2 second reflective surfaces is parallel to one of the M1 first reflective surfaces. The included angle θ1 between any two adjacent first reflective surfaces satisfies: 60° ≤ θ1 ≤ 120°, and the included angle θ2 between any two adjacent second reflective surfaces satisfies: 60° ≤ θ2 ≤ 120°. This facilitates the assembly of the camera module and avoids a certain degree of tilt in the image formed on the first image sensor.

[0008] In one specific implementation, |M1-M2|=1, where, when M1>M2, the last first reflective surface is bent towards the second optical path folding element and used to reflect light from the preceding first reflective surface along a first direction to the first image sensor, where the first direction is the direction from the first optical path folding element to the third optical path folding element, and the last first reflective surface refers to the first reflective surface farthest from the first optical lens assembly; when M1<M2, the last second reflective surface is bent towards the first optical path folding element and used to reflect light from the preceding second reflective surface along a second direction to the first image sensor, where the second direction is the direction from the third optical path folding element to the first optical path folding element, and the last second reflective surface refers to the second reflective surface farthest from the first optical lens assembly. This fully utilizes the spatial length in the first direction (or the second direction) to increase the optical path length without increasing the size of the camera module perpendicular to the first direction.

[0009] In a specific feasible implementation, M3 third reflective surfaces and M4 fourth reflective surfaces are sequentially connected along the direction away from the second optical lens assembly. When M3 ≤ M4, each of the M3 third reflective surfaces is parallel to one of the M4 fourth reflective surfaces; when M3 > M4, each of the M4 fourth reflective surfaces is parallel to one of the M3 third reflective surfaces; and the included angle θ3 between any two adjacent third reflective surfaces satisfies: 60° ≤ θ3 ≤ 120°. This facilitates the assembly of the camera module, avoids a certain tilt in the image formed on the second image sensor, and the included angle θ4 between any two adjacent fourth reflective surfaces satisfies: 60° ≤ θ4 ≤ 120°.

[0010] In a specific implementation scheme, |M3-M4|=1, where, when M3>M4, the last third reflective surface is bent towards the third optical path folding element and used to reflect light from the previous third reflective surface along the first direction to the second image sensor, where the first direction is the direction from the first optical path folding element to the third optical path folding element, and the last third reflective surface refers to the third reflective surface farthest from the second optical lens assembly; when M3<M4, the last fourth reflective surface is bent towards the third optical path folding element and used to reflect light from the previous fourth reflective surface along the second direction to the second image sensor, where the second direction is the direction from the third optical path folding element to the first optical path folding element, and the last fourth reflective surface refers to the fourth reflective surface farthest from the second optical lens assembly; this fully utilizes the spatial length in the first direction (or the second direction) to increase the optical path length without increasing the size of the camera module perpendicular to the first direction.

[0011] In one specific feasible implementation, M2 = M3, with M2 second reflective surfaces corresponding one-to-one with M3 third reflective surfaces. Each pair of corresponding second and third reflective surfaces are arranged back-to-back and parallel to each other. This reduces the size of the camera module in the direction from the first optical path folding element to the third optical path folding element.

[0012] In another specific implementation scheme, M2 = M3, and the M2 second reflecting surfaces correspond one-to-one with the M3 third reflecting surfaces. Each set of corresponding second and third reflecting surfaces is set opposite to each other, and the included angle θ5 between each set of corresponding second and third reflecting surfaces satisfies: 0° < θ5 < 180°.

[0013] The first, second, third, and fourth reflecting surfaces can be formed in various ways. In one specific implementation, at least a portion of the M1 first reflecting surfaces are reflecting surfaces of plane mirrors, and / or, at least a portion of the first reflecting surfaces are the inner or outer sides of the right-angled facet of a right-angled triangular prism; at least a portion of the M2 second reflecting surfaces are reflecting surfaces of plane mirrors, and / or, at least a portion of the second reflecting surfaces are the inner or outer sides of the right-angled facet of a right-angled triangular prism; at least a portion of the M3 third reflecting surfaces are reflecting surfaces of plane mirrors, and / or, at least a portion of the third reflecting surfaces are the inner or outer sides of the right-angled facet of a right-angled triangular prism; at least a portion of the M4 fourth reflecting surfaces are reflecting surfaces of plane mirrors, and / or, at least a portion of the fourth reflecting surfaces are the inner or outer sides of the right-angled facet of a right-angled triangular prism.

[0014] In another specific implementation, the second optical path folding element includes at least one right-angled prism; the inner sides of the two right-angled faces of each right-angled prism face towards the first optical path folding element and form two second reflective surfaces; the outer sides of the two right-angled faces of each right-angled prism face towards the third optical path folding element and form two third reflective surfaces.

[0015] In another specific implementation, the second optical path folding element includes at least one plane mirror; one side of each plane mirror faces the first optical path folding element and forms a second reflective surface, and the other side faces the third optical path folding element and forms a third reflective surface.

[0016] In order to focus the first optical lens assembly and the second optical lens assembly, in a specific implementation, the camera module further includes a driving component; the driving component is used to adjust the distance between the first optical path folding element and the second optical path folding element so that light from the first optical lens assembly is focused onto the first image sensor, and to adjust the distance between the second optical path folding element and the third optical path folding element so that light from the second optical lens assembly is focused onto the second image sensor.

[0017] In a more specific implementation, the driving component is specifically used to: drive the second optical path folding element to move toward the first optical path folding element, or to move toward the third optical path folding element.

[0018] In another, more specific implementation, the driving component is specifically used to: drive the first optical path folding element toward or away from the second optical path folding element; and drive the third optical path folding element toward or away from the second optical path folding element.

[0019] Secondly, a terminal device is provided, which may be a mobile phone, tablet computer, or PDA, and includes: a protective case, and a camera module as provided in any of the above technical solutions; wherein the camera module is disposed inside the protective case. The first and third optical path folding elements of the camera module share a single second optical path folding element, which allows for optical path folding of light from the first optical lens assembly and light from the second optical lens assembly, respectively, without the need to pair a separate optical path folding element for each of the first and third optical path folding elements. This helps to reduce the size of the camera module, thereby facilitating the thinning and lightening of the terminal device. Attached Figure Description

[0020] Figure 1 This diagram illustrates the application of the camera module provided in this application in a mobile phone.

[0021] Figure 2a This application shows a perspective view of a camera module provided in an embodiment of the present application;

[0022] Figure 2b Indicate Figure 2a Top view of the camera module shown;

[0023] Figure 2c express Figure 2a The diagram shown is a schematic of the camera module after the enclosure 61 has been removed.

[0024] Figure 2d It shows the transmission path of light passing through the first optical lens assembly 50a;

[0025] Figure 2e It shows Figure 2d A variation;

[0026] Figure 3 A schematic diagram showing a possible lens combination for the first optical lens assembly 50a is provided.

[0027] Figure 4a Indicate Figures 2a to 2c A schematic diagram of the cooperation between the light adjustment component and the driving component in the corresponding embodiment;

[0028] Figure 4b Indicate Figures 2a to 2c Another schematic diagram of the cooperation between the light adjustment component and the driving component in the corresponding embodiment;

[0029] Figure 5a Indicate Figure 2a A variation of the camera module shown;

[0030] Figure 5b Indicate Figure 2a Another variation of the camera module shown;

[0031] Figure 6 Indicate Figure 2a Another variation of the camera module shown;

[0032] Figure 7 Indicate Figure 2a Another variation of the camera module shown;

[0033] Figure 8 Indicate Figure 2a Another variation of the camera module shown;

[0034] Figure 9 This paper shows a top view of another camera module provided in an embodiment of this application;

[0035] Figure 10a This paper shows a top view of another camera module provided in an embodiment of this application;

[0036] Figure 10b Indicate Figure 10a A 3D view of the camera module shown;

[0037] Figure 10c Indicate Figure 10b The diagram shown is an illustration of the camera module after the housing has been removed.

[0038] Figure 11 This application shows a perspective view of another camera module provided in an embodiment of the present application;

[0039] Figure 12 This shows a perspective view of another camera module provided in an embodiment of this application. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of this application clearer, the application will now be described in further detail with reference to the accompanying drawings.

[0041] To facilitate understanding of the camera module provided in this application embodiment, its application scenario will be explained first. The camera module can be used in terminal devices such as mobile phones, tablets and PDAs (personal digital assistants) that have the need to take pictures, record videos or otherwise capture images. Figure 1 This diagram illustrates the application of the camera module provided in this embodiment in a mobile phone. (Reference) Figure 1 Taking a mobile phone as an example, the mobile phone may include a protective case 03, a mid-frame 04, and a display screen 02. The display screen 02 may be located on the front of the mid-frame 04, and the protective case 03 on the back of the mid-frame 04. The arrangement of the protective case 03, mid-frame 04, and display screen 02 can be known or existing technologies, which will not be elaborated here. The terminal device also includes a camera module 01 provided in this application embodiment, which is located between the protective case 03 and the mid-frame 04. The back of the protective case 03 has a light-receiving port, through which ambient light enters the terminal device and then into the camera module 01 for imaging. However, it should be understood that... Figure 1 The scenario of the camera module 01 is merely illustrative. For example, the aforementioned camera module 01 can also serve as the front-facing camera module of a mobile phone.

[0042] The camera module provided in the embodiments of this application will be described below with reference to the accompanying drawings.

[0043] Figure 2a This application shows a perspective view of a camera module provided in an embodiment. Figure 2b Indicate Figure 2a The top view of the camera module shown. Figure 2c express Figure 2a The diagram shown is an illustration of the camera module after removing the enclosure 61; combined with... Figures 2a to 2c For example, the camera module 01 includes a housing, a periscope mirror 40, a first optical lens assembly 50a, a second optical lens assembly 50b, a light adjustment assembly 10, a first image sensor 20a, and a second image sensor 20b. The housing includes a bottom wall 63 (whose surface is parallel to the xoy plane) and a surrounding wall 61 (parallel to the z-axis) disposed along the edge of the bottom wall 63. The housing may also include a cover with a light-collecting opening to form an accommodating space together with the bottom wall 63 and the surrounding wall 61. The first optical lens assembly 50a, the second optical lens assembly 50b, the light adjustment assembly 10, the first image sensor 20a, and the second image sensor 20b are all disposed within the aforementioned accommodating space.

[0044] The periscope mirror 40 forms an acute angle with the surface of the bottom wall 63, which can be between 30° and 60°, for example, 30°, 45° or 60°. The first optical lens assembly 50a and the second optical lens assembly 50b are arranged side by side (e.g., along the y-axis) and are both located in the x-direction of the periscope mirror 40. The light entrance of the first optical lens assembly 50a and the light entrance of the second optical lens assembly 50b both face the mirror surface of the periscope mirror 40.

[0045] The principal optical axes of the first optical lens assembly 50a and the second optical lens assembly 50b are parallel to each other, such as both extending along the x-axis. It should be understood that "parallel" here means substantially parallel, that is, for those skilled in the art, it can be strictly parallel, or it can have a certain angle (such as an angular error within ±3°). Furthermore, the parallelism is merely exemplary and not limited to this. The principal optical axis can refer to a straight line passing through the centers of the two spherical surfaces of the lens. Figure 3 A schematic diagram of a possible lens combination for the first optical lens assembly 50a is shown, wherein lens 101 is a convex-planar lens, and lens 102 is a concave-concave lens. The principal optical axis of lens 101 is coaxial with the principal optical axis of lens 102 and is referred to as the principal optical axis of the first optical lens assembly 50a. This principal optical axis passes sequentially through the center of the convex surface (spherical surface) of lens 101 and the centers of the two concave surfaces (spherical surfaces) of lens 102. The principal optical axis of the second optical lens assembly 50b refers to the above description of the principal optical axis of the first optical lens assembly 50a.

[0046] The light adjustment assembly 10 is located on the side away from the periscope mirror 40 (i.e., on the side in the x direction) of the first optical lens assembly 50a and the second optical lens assembly 50b. The light adjustment assembly 10 includes a first optical path folding element 11, a second optical path folding element 12 and a third optical path folding element 13 arranged sequentially along the negative y-axis.

[0047] The first optical path folding element 11 includes N1 flat plane mirrors arranged along the x-axis, where N1 is a positive integer. Figure 2a In the diagram, N1 = 2. The first optical path folding element 11 exemplarily includes a plane mirror 11i and a plane mirror 11j. The plane mirror 11i has two surfaces arranged opposite to each other, wherein the surface facing the second optical path folding element 12 is a first reflecting surface 1a. The first reflecting surface 1a can be formed by coating a reflective material, and the first reflecting surface 1a is exemplarily perpendicular to the surface of the bottom wall 63. The angle between the first reflecting surface 1a and the principal optical axis of the first optical lens assembly 50a is denoted as α1 (not shown in the figure), and the angle between the first reflecting surface 1b and the principal optical axis of the first optical lens assembly 50a is denoted as α2 (not shown in the figure).1和 α2 can be an acute angle, for example, between 30° and 75°, such as 30°, 45°, and 75°. α1 and α2 can be equal or unequal. Figure 2a Taking α1 = 45° as an example, the light outlet of the first optical lens assembly 50a is positioned opposite to the first reflecting surface 1a. Similarly, the plane mirror 11j has two opposing surfaces, with the surface facing the second optical path folding element 12 being the first reflecting surface 1b. The plane mirrors 11i and 11j form a structure with a cross-section roughly "V" shaped. The first reflecting surface 1a and the first reflecting surface 1b are connected (or, in other words, the first reflecting surface 1a and the first reflecting surface 1b are continuously arranged; the term "connected" will be used for similar explanations and will not be elaborated further) and the included angle is θ1, which satisfies: 60° ≤ θ1 ≤ 120°. Specifically, θ1 can be 60°, 75°, 90°, 105°, or 120°. Figure 2a Taking θ1 = 90° as an example, other settings for plane mirror 11j can be referenced from the settings for plane mirror 11i.

[0048] Similar to the first optical path folding element 11, the second optical path folding element 12 also includes N2 flat plane mirrors arranged along the x-axis, where N2 is a positive integer. Figure 2a In this configuration, N2 = 2, meaning the second optical path folding element 12 includes plane mirrors 12i and 12j, which together form a structure with a roughly "V"-shaped cross-section. Unlike the first optical path folding element 11, both surfaces of plane mirror 12i have reflective capabilities. The surface facing the first optical path folding element 11 is the second reflecting surface 2a, and the surface facing the third optical path folding element 13 is the third reflecting surface 3a. Both surfaces of plane mirror 12j also have reflective capabilities; one surface is the second reflecting surface 2b, and the other is the third reflecting surface 3b. The second reflecting surface 2a and the second reflecting surface 2b are connected, and the included angle θ2 satisfies: 60° ≤ θ2 ≤ 120°. θ2 can specifically be 60°, 75°, 90°, 105°, or 120°. Figure 2a Taking θ2 = 90° as an example. The third reflecting surface 3a and the third reflecting surface 3b are connected at an angle θ. 3， θ3 satisfies: 60°≤θ3≤120°, where θ3 can be 60°, 75°, 90°, 105°, or 120°. Figure 2a Taking θ3 = θ2 = 90° as an example, the angle between the second reflecting surface 2a and the principal optical axis of the first optical lens assembly 50a is denoted as β1 (not shown in the figure), and the angle between the second reflecting surface 2b and the principal optical axis of the first optical lens assembly 50a is denoted as β2 (not shown in the figure). Both β1 and β2 can be acute angles, for example, between 30° and 75°, such as 30°, 45°, and 75°. β1 and β2 can be equal or unequal. Figure 2a Taking β1 = β2 = 45° as an example, the angle between the third reflecting surface 3a and the principal optical axis of the second optical lens assembly 50b is denoted as γ1 (not shown in the figure), and the angle between the third reflecting surface 3b and the principal optical axis of the second optical lens assembly 50b is denoted as γ2 (not shown in the figure). Both γ1 and γ2 can be acute angles, for example, between 30° and 75°, such as 30°, 45°, and 75°. γ1 and γ2 can be equal or unequal. Figure 2a Taking γ1=γ2=45° as an example, the light outlet of the second optical lens assembly 50b is positioned opposite to the third reflecting surface 3a.

[0049] The third optical path folding element 12 also includes N3 flat plane mirrors arranged along the x-axis, where N3 is a positive integer. Figure 2a In this context, N3 = 2, meaning the third optical path folding element 13 includes plane mirrors 13i and 13j, which together form a structure with a roughly "V"-shaped cross-section. The surface of plane mirror 13i facing the second optical path folding element 12 is the fourth reflecting surface 14a, and the surface of plane mirror 13j facing the second optical path folding element 12 is the fourth reflecting surface 14b. The fourth reflecting surfaces 14a and 14b are connected and form an included angle θ4, which satisfies the condition: 60° ≤ θ4 ≤ 120°. Specifically, θ4 can be 60°, 75°, 90°, 105°, or 120°. Figure 2a Taking θ4 = 90° as an example. The angle between the fourth reflecting surface 4a and the principal optical axis of the second optical lens assembly 50b is denoted as δ1 (not shown in the figure), and the angle between the second reflecting surface 2b and the principal optical axis of the first optical lens assembly 50a is denoted as δ2 (not shown in the figure). Both δ1 and δ2 can be acute angles, for example, between 30° and 75°, such as 30°, 45°, and 75°. δ1 and δ2 can be equal or unequal. Figure 2a Taking δ1=δ2=45° as an example.

[0050] Continue to refer to Figures 2a to 2c The first image sensor 20a is located on the side of the first optical path folding element 11 and the second optical path folding element 12 that is away from the first optical lens assembly 50a, and its light-collecting surface faces the first reflective surface 1b. Figure 2a In this example, the light-receiving surface of the first image sensor 20a is perpendicular to the surface of the bottom wall 63 and to the principal optical axis of the first optical lens assembly 50a. Similarly, the second image sensor 20b is located on the side of the second optical path folding element 12 and the third optical path folding element 13 away from the second optical lens assembly 50b, and its light-receiving surface faces the third reflective surface 3b. Figure 2a In this example, the light-collecting surface of the second image sensor 20b is perpendicular to the surface of the bottom wall 63 and to the main optical axis of the first optical lens assembly 50a.

[0051] The zoom ratio of the first optical lens assembly 50a can be 7X, and the zoom ratio of the second optical lens assembly 50b can be 12X.

[0052] The following is about Figures 2a to 2c The light transmission path in the camera module shown is explained.

[0053] refer to Figures 2a to 2c When the camera module 01 is used to take a picture (or record video) of the subject, light from the subject shines on the periscope mirror 40 in a direction substantially parallel to the z-axis, and is then reflected by the periscope mirror 40 to the light entrance of the first optical lens assembly 50a and the light entrance of the second optical lens assembly 50b, respectively. The subject can be objects that reflect light, such as people, buildings, plants, and animals, or objects with self-illuminating functions, such as the moon and lamps.

[0054] In this process, the light rays passing through the first optical lens assembly 50a are incident on the first reflective surface 1a of the first optical path folding element 11, then reflected by the first reflective surface 1a to the second reflective surface 2a of the second optical path folding element 12, then reflected by the second reflective surface 2a to the second reflective surface 2b, then reflected by the second reflective surface 2b to the first reflective surface 1b, and finally reflected by the first reflective surface 1b to the light-collecting surface of the first image sensor 20a. The first image sensor 20a processes the received light rays into an electrical signal containing image information of the subject, thereby completing the photographing (or recording) of the subject. After the light rays are reflected multiple times between the first optical path folding element 11 and the second optical path folding element 12, their optical path is folded. That is, after the light rays are transmitted from the light outlet of the first optical lens assembly 50a, they do not travel in a straight line to the light-collecting surface of the first image sensor 20a, but rather the optical path is folded into a tortuous shape. Thus, the optical path between the first optical lens assembly 50a and the first image sensor 20a is extended within a limited space, so that the first optical lens assembly 50a has a higher optical zoom ratio. In other words, when the first optical lens assembly 50a and the first image sensor 20a have a higher optical zoom ratio, the straight line length between the first optical lens assembly 50a and the first image sensor 20a can be shortened, thereby facilitating the reduction of the size of the camera module.

[0055] Similarly, the light rays after passing through the second optical lens assembly 50b are incident on the third reflecting surface 3a of the second optical path folding element 12, then reflected by the third reflecting surface 3a to the fourth reflecting surface 4a of the third optical path folding element 13, then reflected by the fourth reflecting surface 4a to the fourth reflecting surface 4b, then reflected by the fourth reflecting surface 4b to the third reflecting surface 3b, and finally reflected by the third reflecting surface 3b to the light-collecting surface of the second image sensor 20b. The second image sensor 20b processes the received light rays into an electrical signal containing image information of the subject, thereby completing the photographing (or recording) of the subject. The second optical path folding element 12 and the third optical path folding element 13 work together to achieve optical path folding of the light rays transmitted from the second optical lens assembly 50b. For an analysis of the effects described in this section, please refer to the previous section's analysis of the first optical lens assembly 50a, the first optical path folding element 11, and the second optical path folding element 12.

[0056] exist Figures 2a to 2c In the corresponding embodiment, the light from the first optical lens assembly 50a and the light from the second optical lens assembly 50b are optically folded, and the second optical path folding element 12 is used to cooperate with the first optical path folding element 11 and the third optical path folding element 13 respectively, without having to pair a separate optical path folding element for the first optical path folding element 11 and the third optical path folding element 13. This is equivalent to saving one optical path folding element, reducing costs, and saving internal space of the camera module 01, which is conducive to further miniaturization of the camera module 01.

[0057] In addition, in order to further miniaturize the camera module 01, some structures of the first optical path folding element 11, such as the connection between plane mirror 11i and plane mirror 11j, can be fitted into the area between plane mirror 12i and plane mirror 12j; correspondingly, the connection between plane mirror 12i and plane mirror 12j can also be fitted into the area between plane mirror 13i and plane mirror 13j.

[0058] To further illustrate the periscope reflection principle of periscope mirror 40, Figure 2d This illustrates the transmission path of light passing through the first optical lens assembly 50a, with reference to... Figure 2dThe periscope mirror 40 is a plane mirror. Ambient light is reflected by the periscope mirror 40 to the first optical lens assembly 50a, and then transmitted to the light adjustment assembly 10. The light is folded by the light adjustment assembly 10 and then directed to the first image sensor 20a. The reflection and deflection of the light by the periscope mirror 40 allows the first optical lens assembly 50a to be arranged along the x-axis, rather than perpendicular to the x-axis, which helps to reduce the thickness of the camera module 01. Furthermore, to better focus the light from the subject onto the periscope mirror 40 before reflection, two focusing lenses 90 can be added to the incident light direction of the periscope mirror 40. The two focusing lenses 90 correspond one-to-one with the positions of the first optical lens assembly 50a and the second optical lens assembly 50b, respectively. Light passing through one focusing lens 90 is reflected by the periscope mirror 40 to the first optical lens assembly 50a, and light passing through the other focusing lens 90 is reflected by the periscope mirror 40 to the second optical lens assembly 50b.

[0059] Figure 2e It shows Figure 2d A variation, Figure 2e The periscope reflector 40, which is composed of plane mirrors, is replaced with a right-angled triangular prism. Exemplarily, one right-angled face of this prism is parallel to the surface of the bottom wall 63. It should be understood that "parallel" here means substantially parallel; that is, for those skilled in the art, it can be strictly parallel or have a certain angle, and it is positioned away from the bottom wall 63. The other right-angled face is perpendicular to the surface of the bottom wall 63 and faces the first optical lens assembly 50a and the second optical lens assembly 50b. The inclined plane between the two right-angled faces is perpendicular to the surface of the bottom wall 63 and faces towards the first optical lens assembly 50a and the second optical lens assembly 50b. Figure 2d The periscope reflector 40 has its reflecting surfaces set at the same angle and position. Light enters the right-angle prism from a surface parallel to the bottom wall 63, and is reflected by the inner side of the aforementioned inclined surface. The reflected light then exits perpendicularly through another right-angle surface to the first optical lens assembly 50a. The term "right-angle surface" in this section is explained as follows: In a right-angle prism, of the three sides connecting the top and bottom surfaces, two sides are perpendicular to each other, and the third side connects these two perpendicular sides. Either of the two perpendicular sides is called a right-angle surface of the right-angle prism.

[0060] Back Figure 2cThe camera module 01 may also include an optical image stabilization (OIS) motor 80, which is connected to the periscope mirror 40. Based on the detected jitter information, the OIS motor 80 drives the periscope mirror 40 to move in the opposite direction to the jitter, thereby compensating for the jitter of the light rays incident on the periscope mirror 40, so that the light rays reflected by the periscope mirror 40 are reflected as accurately as possible to the first optical lens assembly 50a and the second optical lens assembly 50b, thereby improving the image quality.

[0061] The first optical lens assembly 50a and the second optical lens assembly 50b share a periscope mirror 40. Therefore, only one optical image stabilization motor 80 is needed for shake compensation, which helps to reduce costs.

[0062] In addition, a light-blocking plate 62 is provided between the first optical lens assembly 50a and the second optical lens assembly 50b. The light-blocking plate 62 can extend from the periscope mirror 40 to the vicinity of the second optical path folding element 12 to direct the light transmitted from the first optical lens assembly 50a toward the second image sensor 20b, while preventing the light transmitted from the second optical lens assembly 50b from hitting the first image sensor 20a.

[0063] It should be noted that the light transmitted from the first optical lens assembly 50a, if only illuminating the light-receiving surface of the first image sensor 20a, cannot form a clear image. Appropriate adjustments are needed to focus the light onto the light-receiving surface of the first image sensor 20a. Specifically, for example, depending on the distance of the subject, the position of the first optical lens assembly 50a can be adjusted along its principal optical axis, or the position of the first image sensor 20a can be adjusted (e.g., along the x-axis) to control the path length (image distance) of the light from the light outlet of the first optical lens assembly 50a to the first image sensor 20a. A similar method can be used to adjust the positions of the second optical lens assembly 50b and the second image sensor 20b to achieve the same purpose.

[0064] However, the above methods for adjusting the image distance are merely exemplary, and other methods for adjusting the image distance are also provided in the embodiments of this application.

[0065] Figure 4a Indicate Figures 2a to 2c The schematic diagram of the cooperation between the light adjustment component and the driving component in the corresponding embodiment shows that the driving component is in Figures 2a to 2c It is not shown in the document. Please refer to [the document / reference]. Figure 4aThe driving assembly includes a first driving motor 71 and a second driving motor 72, both of which can be autofocus (AF) motors. The output of the first driving motor 71 is connected to the first optical path folding element 11 to drive it to move back and forth along the y-axis, thereby adjusting the distance between the first reflecting surface 1a and the second reflecting surface 2a, and the distance between the first reflecting surface 1b and the second reflecting surface 2b. This changes the degree of optical path folding of the light transmitted from the first optical lens assembly 50a, and consequently, the image distance. Depending on the distance of the subject (i.e., different object distances), the first driving motor 71 drives the first optical path folding element 11 closer to or further away from the second optical path folding element 12, focusing the folded light onto the light-collecting surface of the first image sensor 20a. For example, when the first optical path folding element 11 approaches the second optical path folding element 12, the optical path is shortened; when the first optical path folding element 11 moves away from the second optical path folding element 12, the optical path is lengthened. Similarly, the output of the second drive motor 72 is connected to the third optical path folding element 13 to drive the third optical path folding element 13 to move closer to or away from the second optical path folding element 12, so that the light transmitted from the second optical lens assembly 50b is focused onto the light-collecting surface of the second image sensor 20b.

[0066] exist Figure 4a In the focusing method shown, the first optical path folding element 11 and the third optical path folding element 13 are driven respectively, so the first optical lens assembly 50a and the second optical lens assembly 50b can focus simultaneously. However, it is also possible to focus on one of them first and then focus on the other.

[0067] Furthermore, the first drive motor 71 only drives the first optical path folding element 11, so only the travel range of the first optical path folding element 11 needs to be considered; similarly, the second drive motor 72 only needs to consider the travel range of the third optical path folding element 13, so the travel requirements for the first drive motor 71 and the second drive motor 72 are relatively low.

[0068] Furthermore, during the above adjustment process, the second optical path folding element 12 remains stationary, facilitating precise control of the distance between the first optical path folding element 11 and the second optical path folding element 12, as well as the distance between the third optical path folding element 13 and the second optical path folding element 12. However, if the adjustment speed is to be accelerated, the second optical path folding element 12 can also be driven simultaneously.

[0069] Back Figures 2a to 2c The camera module 01 also includes a flexible circuit board 30, which extends through the bottom of the enclosure 61 into the housing and is electrically connected to the first drive motor 71 and the second drive motor 72 to provide control signals and power to the first drive motor 71 and the second drive motor 72.

[0070] Figure 4b Indicate Figures 2a to 2c The schematic diagram of the cooperation between the light adjustment component and the driving component in the corresponding embodiment shows that the driving component is in Figures 2a to 2c Not shown in the image. (With) Figure 4a The corresponding embodiment differs in that the driving component includes a third driving motor 73. The output end of the third driving motor 73 is connected to the second optical path folding element 12 and is used to drive the second optical path folding element 12 to move along the y-axis between the first optical path folding element 11 and the third optical path folding element 13, so that the second optical path folding element 12 moves closer to the first optical path folding element 11 and away from the third optical path folding element 13, or moves closer to the third optical path folding element 13 and away from the first optical path folding element 11. For example, when focusing first using the first optical lens assembly 50a, the third driving motor 73 can first drive the distance between the second optical path folding element 12 and the first optical path folding element 11 to a specified distance, so that the light transmitted from the first optical lens assembly 50a is focused onto the first image sensor 20a. After the first image sensor 20a reaches the specified exposure time, the third driving motor 73 can then drive the distance between the second optical path folding element 12 and the third optical path folding element 13 to a specified distance, so that the light transmitted from the second optical lens assembly 50b is focused onto the second image sensor 20b. The first optical lens assembly 50a can be a color camera, and the second optical lens assembly 50b can be a monochrome camera. To avoid the third drive motor 73 blocking light, it can be positioned one layer above the second optical path folding element 12 in the positive z-axis direction or the negative z-axis direction. Alternatively, the third drive motor 73 can be positioned on the side of the third optical path folding element 13 opposite to the second optical path folding element 12, with its output end connected to the second optical path folding element 12 via a transmission component bypassing the third optical path folding element 13. This eliminates the need for separate layers between the third drive motor 73 and the second optical path folding element 12, ensuring that the camera module 01 has a smaller thickness in the z-axis direction.

[0071] exist Figure 4b In the embodiment shown, focusing on the first optical lens assembly 50a and the second optical lens assembly 50b can be completed sequentially by using only one motor, the third drive motor 73, which can further reduce the size of the camera module 01 and reduce costs.

[0072] The third drive motor 73 also receives control signals and electrical energy through the flexible circuit board 30.

[0073] Figures 2a to 4b The corresponding embodiments are merely exemplary. The light adjustment component 10 in the camera module 01 can also have various variations, some of which are listed below.

[0074] Figure 5a It shows Figure 2a The image shown is a variation of the camera module; for simplicity, Figure 5a It is not shown (but it does not not exist). Figure 2a The housing and flexible circuit board 30 in the middle. Figure 5a The camera module 01 shown is Figures 2a to 2c The difference in the corresponding embodiments is that the first optical path folding element 11 includes two sets. Figure 2a The structure consists of a "V" shape formed by plane mirrors 11i and 11j. The latter group (the group farther from the first optical lens assembly 50a) of the "V" shape can be considered as a translation of the former group (the group closer to the first optical lens assembly 50a) along the x-axis. Furthermore, the free end of the plane mirror 11j of the former "V" shape is connected to the free end of the plane mirror 11i of the latter "V" shape. The angle between the first reflecting surface 1b of the former "V" shape and the first reflecting surface 1a of the latter "V" shape is θ1.

[0075] Similarly, the second optical path folding element 12 also includes two sets of "V"-shaped structures arranged and connected along the x-direction, and the third optical path folding element 13 also includes two sets of "V"-shaped structures arranged and connected along the x-direction.

[0076] The light transmitted from the first optical lens assembly 50a follows the following path: first first reflecting surface 1a, first second reflecting surface 2a, first second reflecting surface 2b, first first reflecting surface 1b, second first reflecting surface 1a, second second reflecting surface 2a, second second reflecting surface 2b, and second first reflecting surface 1b, and is transmitted from the second first reflecting surface 1b to the first image sensor 20a. The light transmitted from the second optical lens assembly 50b follows the following path: first third reflecting surface 3a, first fourth reflecting surface 4a, first fourth reflecting surface 4b, first third reflecting surface 3b, second third reflecting surface 3a, second fourth reflecting surface 4a, second fourth reflecting surface 4b, and second third reflecting surface 3b, and is transmitted from the second third reflecting surface 3b to the second image sensor 20b. In this section, "the m-th and n-th reflecting surface" refers to the m-th and n-th reflecting surface along the x-axis, where m and n are both positive integers.

[0077] pass Figure 5aThe illustrated arrangement further extends the light path length from the first optical lens assembly 50a to the first image sensor 20a, and the light path length from the second optical lens assembly 50b to the second image sensor 20b. It should be understood that the number of "V"-shaped structures included in the first optical path folding element 11, the second optical path folding element 12, and the third optical path folding element 13 are exemplary. The number of "V"-shaped structures can be set to one or more as needed, and the arrangement of each pair of adjacent "V"-shaped structures is referenced. Figure 5a The method described above, by increasing the number of "V"-shaped structures, extends the light path length from the first optical lens assembly 50a to the first image sensor 20a, and the light path length from the second optical lens assembly 50b to the second image sensor 20b, while maintaining the direction of the light emitted from the light adjustment assembly 10.

[0078] Figure 5b Indicate Figure 2a Another variation of the camera module shown, wherein, with Figure 2a compared to, Figure 5b The illustrated embodiment omits plane mirrors 11j, 12j, and 13j. The path of light transmitted from the first optical lens assembly 50a is: first reflecting surface 1a, second reflecting surface 2a, and first image sensor 20a; the path of light transmitted from the second optical lens assembly 50b is: third reflecting surface 3a, fourth reflecting surface 4a, and second image sensor 20b.

[0079] Figure 6 Indicate Figure 2a Another variation of the camera module shown. Figure 6 The camera module 01 shown is Figure 2a The difference in the shown camera module 01 is that the first optical path folding element 11 further includes a plane mirror 11k. The plane mirror 11k has two opposing surfaces, one of which is a first reflecting surface 1a (a second first reflecting surface 1a along the positive x-axis). The second first reflecting surface 1a is in contact with the first reflecting surface 1b, and the angle between the second first reflecting surface 1a and the first reflecting surface 1b is θ1. The first image sensor 20a is located in the negative direction of the plane mirror 11k, and the light-collecting surface of the first image sensor 20a is exemplarily substantially perpendicular to the y-axis. Figure 2a Based on the light transmission path in the light adjustment assembly 10 shown, light is reflected from the first reflecting surface 1b to the second first reflecting surface 1a, and then reflected by the second first reflecting surface 1a to the light-collecting surface of the first image sensor 20a. Therefore, Figure 5a The light adjustment component 10 shown is in Figure 2aBased on the light adjustment component 10 shown, the optical path length from the first optical lens component 50a to the first image sensor 20a is extended. Furthermore, the first image sensor 20a is no longer arranged sequentially with the first optical lens component 50a and the light adjustment component 10 along the longitudinal direction (x-axis direction), but is arranged laterally along the negative y-axis direction. This reduces the longitudinal length of the camera module 01 and makes full use of the lateral length of the camera module 01, which facilitates the miniaturization of the camera module 01.

[0080] Figure 7 Indicate Figure 2a Another variation of the camera module shown. (Reference) Figure 7 ,and Figure 6 Similarly, it can also be done in Figure 2a Based on this, a plane mirror (with a second third reflecting surface 3a forming an angle θ2 with the first third reflecting surface 3b) is added to the second optical path folding element 12 in the positive x-axis direction. Simultaneously, the second image sensor 20b is shifted to the negative y-axis direction of this plane mirror. This plane mirror is used to reflect the light reflected to the first third reflecting surface 3b laterally (in the negative y-axis direction) back to the second image sensor 20b. This achieves the same effect as... Figure 6 A similar effect.

[0081] You can also follow Figure 6 and Figure 7 The above-described method simultaneously adds a plane mirror in the positive x-axis direction of both the first optical path folding element 11 and the second optical path folding element 12. Furthermore, the plane mirror added to the second optical path folding element 12 has two reflective surfaces (a second reflective surface and a third reflective surface). By adjusting the position of the second image sensor 20b accordingly, it is also possible to achieve the same effect as... Figure 6 Similar purpose.

[0082] or, Figure 8 Indicate Figure 2a Another variation of the camera module shown. (Reference) Figure 8 ,exist Figure 2a Based on the illustrated embodiment, plane mirrors 11j and 12j are removed, and the positions of the first image sensor 20a and the second image sensor 20b are adjusted accordingly. The light-collecting surface of the second image sensor 20b is aligned with the fourth reflective surface 4b, which also achieves the desired effect. Figure 6 A similar effect.

[0083] Figures 6 to 8 The corresponding embodiments can all utilize the lateral (y-axis direction) dimension to extend the optical path, but this is merely exemplary. Regarding the cooperation relationship between the first optical path folding element 11 and the second optical path folding element 12, to achieve the purpose of extending the optical path using the lateral dimension, it is only necessary to satisfy:

[0084] |M1-M2|=1, where M1 is the number of first reflecting surfaces on the first optical path folding element 11, and M2 is the number of second reflecting surfaces on the second optical path folding element 12. Both M1 and M2 are positive integers. When M1>M2, the last first reflecting surface (such as…) Figure 6 The second first reflecting surface 1a) along the positive x-axis is bent toward the direction of the second optical path folding element, and is used to fold the previous first reflecting surface (such as the last first reflecting surface) from the last first reflecting surface. Figure 6 The light rays from the first reflecting surface 1b along the positive x-axis are reflected to the first image sensor along a first direction, wherein the first direction (e.g., the light rays from the first reflecting surface 1b along the positive x-axis are reflected to the first image sensor along a first direction) Figure 6 The negative y-axis direction in the image refers to the direction from the first optical path folding element to the third optical path folding element. The last first reflecting surface refers to the first reflecting surface that is furthest from the first optical lens assembly. When M1 < M2, the last second reflecting surface bends in the direction of the first optical path folding element and is used to reflect the light from the previous second reflecting surface of the last second reflecting surface to the first image sensor along the second direction. The second direction is the direction from the third optical path folding element to the first optical path folding element.

[0085] Regarding the cooperation between the second optical path folding element 12 and the third optical path folding element 13, to achieve the purpose of extending the optical path by utilizing the lateral dimension, it is only necessary to satisfy:

[0086] |M3-M4|=1, where M3 is the number of third reflecting surfaces on the second optical path folding element 12, and M4 is the number of fourth reflecting surfaces on the third optical path folding element 14. Both M3 and M4 are positive integers. When M3>M4, the last third reflecting surface (such as…) Figure 7 The second first reflecting surface 3a) along the positive x-axis is bent toward the direction of the third optical path folding element, and is used to fold the previous third reflecting surface (such as the last third reflecting surface) from the last third reflecting surface. Figure 7 The light rays from the first reflecting surface 3b along the positive x-axis in the first direction (e.g., the light rays from the first reflecting surface 3b along the positive x-axis in the first direction) are along ... Figure 7 The negative y-axis direction in the image is reflected to the second image sensor, where the first direction is the direction from the first optical path folding element to the third optical path folding element; when M3 < M4, the last fourth reflecting surface (such as...) is reflected to the second image sensor. Figure 8 The first fourth reflecting surface 4b) along the positive x-axis is bent towards the direction of the third optical path folding element, and is used to redirect the light from the M3 fourth reflecting surface along the second direction (such as...). Figure 8 The positive y-axis direction of the light is reflected to the second image sensor, where the second direction is the direction from the third optical path folding element to the first optical path folding element.

[0087] Figures 2a to 8In the corresponding embodiments, the second optical path folding element 12 includes a plurality of plane mirrors connected sequentially along the x-axis, and the surface of each plane mirror facing the first optical path folding element 11 forms a second reflecting surface, and the surface facing the third optical path folding element 13 forms a third reflecting surface. However, this is merely exemplary, and the second optical path folding element 12 may include at least one plane mirror.

[0088] Furthermore, in the above embodiments, the number of second reflective surfaces M2 is equal to the number of third reflective surfaces M3, and there is a one-to-one correspondence between the M2 second reflective surfaces and the M3 third reflective surfaces. Each pair of corresponding second and third reflective surfaces is arranged opposite to each other and parallel to each other. It should be understood that "arranged opposite to each other" here means that the second and third reflective surfaces are located on opposite sides of the medium, positioned opposite each other, and facing opposite directions; "parallel" here means substantially parallel, that is, for those skilled in the art, it can be strictly parallel, or it can have a certain angle (such as an angle error within ±3°). However, this is merely an example.

[0089] Figure 9 This paper shows a top view of another camera module provided in an embodiment of this application. Figure 9 The camera module 01 shown is Figure 2a The difference in the camera module 01 shown is that the opening of the V-groove structure formed by the first reflecting surface 1a and the first reflecting surface 1b faces the second optical path folding element 12, and the opening of the V-groove structure formed by the fourth reflecting surface 4a and the fourth reflecting surface 4b faces the second optical path folding element 12. The second reflecting surface 2a and the second reflecting surface 2b on the second optical path folding element 12 are arranged opposite to and parallel to the first reflecting surface 1a and the first reflecting surface 1b, respectively. The third reflecting surface 3a and the third reflecting surface 3b are arranged opposite to and parallel to the fourth reflecting surface 4a and the fourth reflecting surface 4b, respectively. Here, "parallel" means substantially parallel, that is, for those skilled in the art, it can be strictly parallel, or it can have a certain angle (such as an angle error within ±3°). The angle θ5 between the second reflecting surface 2a and the third reflecting surface 3a, and the angle θ5 between the second reflecting surface 2b and the third reflecting surface 3b, both satisfy: 0° < θ5 < 180°.

[0090] Figure 10a This paper shows a top view of another camera module provided in an embodiment of this application. Figure 10b Indicate Figure 10a A 3D view of the camera module shown. Figure 10c Indicate Figure 10b The diagram shown is an illustration of the camera module after the housing has been removed. Figures 10a to 10c The illustrated embodiments and Figures 2a to 2cThe difference lies in replacing the "V"-shaped structure composed of plane mirrors 11i and 11j in the first optical path folding element 11 with a right-angled triangular prism. The outer side of one right-angled facet of the right-angled triangular prism serves as the first reflecting surface 1a, and the outer side of the other right-angled facet serves as the first reflecting surface 1b. Correspondingly, the "V"-shaped structure composed of plane mirrors 12i and 12j in the second optical path folding element 12 is also replaced with a right-angled triangular prism. The inner side of one right-angled facet serves as the second reflecting surface 2a, and the outer side serves as the third reflecting surface 3a; the inner side of the other right-angled facet serves as the second reflecting surface 2b, and the outer side serves as the third reflecting surface 3b. Furthermore, the "V"-shaped structure composed of plane mirrors 13i and 13j in the third optical path folding element 13 is replaced with a right-angled triangular prism. The inner side of one right-angled facet serves as the fourth reflecting surface 4a, and the inner side of the other right-angled facet serves as the fourth reflecting surface 4b. Figures 10a to 10c Zhongyu Figures 2a to 2c The reflective surfaces with the same name in the diagram have the same function, where θ1 = θ2 = θ3 = θ4 = 90°.

[0091] Similarly, including but not limited to Figures 2a to 8 Any "V" shaped structure can be replaced by a right-angled triangular prism. The replacement method can be found in [reference needed]. Figures 10a to 10c The form is as follows. Furthermore, each reflecting surface can be replaced by the inner or outer side of a right-angled facet of a right-angled prism.

[0092] Furthermore, each first reflecting surface can be formed by the inner or outer side of a right-angled facet of a right-angled prism, or by the reflecting surface of a plane mirror. Therefore, when the first optical path folding element 11 has M1 first reflecting surfaces, at least a portion of the first reflecting surfaces are the reflecting surfaces of a plane mirror, and / or, at least a portion of the first reflecting surfaces are the inner or outer side of a right-angled facet of a right-angled prism; this is also true for each second reflecting surface, each third reflecting surface, and each fourth reflecting surface.

[0093] The second optical path folding element 12 may include at least one right-angled prism, or at least one plane mirror, or may be composed of both a plane mirror and a right-angled prism.

[0094] All of the above embodiments satisfy the following:

[0095] Condition 1: Along the direction away from the first optical lens assembly (as referenced) Figure 5a , Figure 6 and Figure 8 In the positive x-axis direction), M1 first reflecting surfaces are connected sequentially (M1 first reflecting surfaces are set continuously), and M2 second reflecting surfaces are connected sequentially (M2 second reflecting surfaces are set continuously). When M1≤M2 (e.g. Figure 5a and Figure 8 Each of the M1 first reflecting surfaces is parallel to one of the M2 second reflecting surfaces; when M1>M2 (e.g. Figure 6 Each of the M2 second reflecting surfaces is parallel to one of the M1 first reflecting surfaces; or, in other words, along a direction away from the first optical lens assembly (refer to...). Figure 5a , Figure 6 and Figure 8 In the x-axis (positive direction), the i-th first reflecting surface and the i-th second reflecting surface are set opposite and parallel to each other, where i is a positive integer and i≤P, and P takes the smaller value of M1 and M2. In the statement "the i-th first reflecting surface and the i-th second reflecting surface are set opposite and parallel to each other", the first i and the second i always refer to the same value, such as both equal to 1, or both equal to 2; and the included angle θ1 between any two adjacent first reflecting surfaces satisfies: 60°≤θ1≤120°, and the included angle θ2 between any two adjacent second reflecting surfaces satisfies: 60°≤θ2≤120°. Therefore, the included angle θ1 between any two adjacent first reflecting surfaces is equal to the included angle θ2 between any two adjacent second reflecting surfaces. It should be understood that "parallel" in this paragraph refers to substantial parallelism, that is, for those skilled in the art, it can be strictly parallel or have a certain angle (such as an angle error within ±3°).

[0096] Condition 2: Along the direction away from the second optical lens assembly (as referenced) Figure 5a , Figure 6 , Figure 7 and Figure 8 In the positive x-axis direction), M3 third reflecting surfaces are connected sequentially (M3 third reflecting surfaces are set continuously), and M4 fourth reflecting surfaces are connected sequentially (M4 fourth reflecting surfaces are set continuously). When M3≤M4 (e.g. Figure 8 Each of the M3 third reflecting surfaces is parallel to one of the M4 fourth reflecting surfaces; when M3>M4 (e.g. Figure 7 Each of the M4 fourth reflecting surfaces is parallel to one of the M3 third reflecting surfaces; in other words, along the direction away from the second optical lens assembly (as referenced) Figure 5a , Figure 6 , Figure 7 and Figure 8In the x-axis (positive direction), the j-th third reflecting surface and the j-th fourth reflecting surface are set opposite to each other and parallel, where j is a positive integer and j≤Q, and Q takes the smaller value of M3 and M4. The first j and the second j in the statement "the j-th third reflecting surface and the j-th fourth reflecting surface are set opposite to each other and parallel" are always equal, such as both equal to 1 or both equal to 2; and the included angle θ3 between any two adjacent third reflecting surfaces satisfies: 60°≤θ3≤120°, and the included angle θ4 between any two adjacent fourth reflecting surfaces satisfies: 60°≤θ4≤120°. Therefore, the included angle θ3 between any two adjacent third reflecting surfaces is equal to the included angle θ4 between any two adjacent fourth reflecting surfaces. It should be understood that "parallel" in this paragraph refers to substantial parallelism, that is, for those skilled in the art, it can be strictly parallel or have a certain angle (such as an angle error within ±3°).

[0097] However, this is merely an example, and the camera module provided in this application embodiment may only satisfy one of conditions one and condition two.

[0098] Alternatively, neither condition one nor condition two can be satisfied. Specifically, this could mean that the angle between the first reflecting surface and the corresponding second reflecting surface is greater than zero (i.e., θ1 is not equal to θ2), and the angle between the third reflecting surface and the corresponding fourth reflecting surface is greater than zero (i.e., θ3 is not equal to θ4). Alternatively, the first and second reflecting surfaces may not have a one-to-one correspondence, nor may the third and fourth reflecting surfaces have a one-to-one correspondence. As long as the following condition is met, it is acceptable:

[0099] The first optical path folding element has M1 first reflective surfaces, and the second optical path folding element has M2 second reflective surfaces. Light from the first optical lens assembly is reflected between the M1 first reflective surfaces and the M2 second reflective surfaces to fold the optical path, and the folded light is reflected to the first image sensor. The second optical path folding element includes M3 third reflective surfaces, and the third optical path folding element includes M4 fourth reflective surfaces. Light from the second optical lens assembly is reflected between the M3 third reflective surfaces and the M4 fourth reflective surfaces to fold the optical path, and the folded light is reflected to the second image sensor. Wherein, M1, M2, M3, and M4 are all positive integers.

[0100] Besides using reflection to fold the light path, the principle of refraction can also be used to fold the light path. Therefore, to achieve the effect of the first and third light path folding elements sharing the second light path folding element, thereby reducing the size of the camera module, it is only necessary to satisfy:

[0101] The light adjustment assembly includes a first optical path folding element, a second optical path folding element, and a third optical path folding element, with the first and third optical path folding elements positioned on either side of the second optical path folding element. The first and second optical path folding elements cooperate to fold the light from the first optical lens assembly and focus it onto the first image sensor. The third optical path folding element cooperates with the second optical path folding element to fold the light from the second optical lens assembly and focus it onto the second image sensor.

[0102] This application also provides some other specific forms of the camera module 01.

[0103] Figure 11 This shows a perspective view of another camera module provided in an embodiment of this application. Figure 11 and Figures 10a to 10c The difference in the corresponding embodiment is that the first optical path folding element 11 is removed, and the first image sensor 20a can be appropriately placed closer to the first optical lens assembly 50a, so that the light passing through the first optical lens assembly 50a directly hits the first image sensor 20a. Any right-angle prism can be replaced with a "V"-shaped structure composed of two plane mirrors.

[0104] Figure 12 This shows a perspective view of another camera module provided in an embodiment of this application. Figure 12 and Figure 2b The difference is that the light adjustment component 10 is completely removed.

[0105] Based on the same technical concept, this application also provides a terminal device, which can be a mobile phone, tablet computer, or PDA (personal digital assistant) or other device with functions such as taking pictures, recording videos or capturing other images.

[0106] This terminal device can be referenced. Figure 1Taking a mobile phone as an example, the mobile phone may include a protective case 03, a mid-frame 04, and a display screen 02. The display screen 02 may be located on the front of the mid-frame 04, and the protective case 03 may be located on the back of the mid-frame 04. The way the protective case 03, mid-frame 04, and display screen 02 are combined may be known or existing technologies, which will not be described in detail here. The terminal device also includes a camera module 01 provided in this application embodiment, which is located between the protective case 03 and the mid-frame 04. The back of the protective case 03 has a light-collecting port, through which ambient light enters the terminal device and enters the camera module 01 for imaging. The periscope mirror 40 is opposite to the light-collecting port, and the periscope mirror 40, the first optical lens assembly 50a (second optical lens assembly 50b), and the light adjustment assembly 10 are arranged in a direction parallel to the display screen 02. It should be understood that "parallel" in this paragraph refers to substantial parallelism, that is, for those skilled in the art, it can be strictly parallel or have a certain angle (such as an angle error within ±3°).

[0107] It should be understood that, in Figure 1 In the middle, the camera module 01 is covered by the protective shell 03, so it can also be said that the camera module 01 is located inside the protective shell 03.

[0108] As can be seen from the analysis of the camera module 01 provided in the foregoing embodiments, the camera module 01 has a miniaturized structure. Therefore, the use of the camera module 01 in the terminal device also facilitates miniaturization.

[0109] Furthermore, the components in the accompanying drawings of the embodiments of this application are only for illustrating the working principle of the camera module or terminal device and do not actually reflect the actual size relationship of each component.

[0110] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A camera module, characterized in that, include: The system comprises a first optical lens assembly, a second optical lens assembly, a light adjustment assembly, a first image sensor, and a second image sensor; wherein... Both the first optical lens assembly and the second optical lens assembly are used to receive light from the subject. The light adjustment assembly includes a first optical path folding element, a second optical path folding element, and a third optical path folding element, with the first optical path folding element and the third optical path folding element arranged on both sides of the second optical path folding element; The first optical path folding element and the second optical path folding element cooperate to fold the light from the first optical lens assembly and focus it onto the first image sensor; The third optical path folding element and the second optical path folding element cooperate to fold the light from the second optical lens assembly and focus it onto the second image sensor.

2. The camera module according to claim 1, characterized in that, The first optical path folding element has M1 first reflective surfaces, all of which face the second optical path folding element. The second optical path folding element has M2 second reflective surfaces, all of which face the first optical path folding element. Light from the first optical lens assembly is reflected between the M1 first reflective surfaces and the M2 second reflective surfaces to fold the light path, and the folded light is reflected to the first image sensor. The second optical path folding element includes M3 third reflective surfaces, all of which face the third optical path folding element. The third optical path folding element includes M4 fourth reflective surfaces, all of which face the second optical path folding element. Light from the second optical lens assembly is reflected between the M3 third reflective surfaces and the M4 fourth reflective surfaces to fold the optical path, and the folded light is reflected to the second image sensor. Where M1, M2, M3 and M4 are all positive integers.

3. The camera module according to claim 2, characterized in that, Along a direction away from the first optical lens assembly, M1 first reflective surfaces are connected in sequence, and M2 second reflective surfaces are connected in sequence. When M1≤M2, each of the M1 first reflective surfaces is parallel to one of the M2 second reflective surfaces; when M1>M2, each of the M2 second reflective surfaces is parallel to one of the M1 first reflective surfaces. The included angle θ1 between any two adjacent first reflective surfaces satisfies: 60°≤θ1≤120°, and the included angle θ2 between any two adjacent second reflective surfaces satisfies: 60°≤θ2≤120°.

4. The camera module according to claim 3, characterized in that, |M1-M2|=1, where, When M1 > M2, the last first reflective surface bends towards the second optical path folding element and is used to reflect the light from the previous first reflective surface of the last first reflective surface along the first direction to the first image sensor, wherein the first direction is the direction from the first optical path folding element to the third optical path folding element, and the last first reflective surface refers to the first reflective surface that is furthest away from the first optical lens assembly. When M1 < M2, the last second reflective surface bends towards the first optical path folding element and is used to reflect the light from the previous second reflective surface of the last second reflective surface along the second direction to the first image sensor, wherein the second direction is the direction in which the third optical path folding element points to the first optical path folding element, and the last second reflective surface refers to the second reflective surface that is furthest away from the first optical lens assembly.

5. The camera module according to claim 2, characterized in that, Along a direction away from the second optical lens assembly, M3 third reflective surfaces are connected in sequence, and M4 fourth reflective surfaces are connected in sequence. When M3 ≤ M4, each of the M3 third reflective surfaces is parallel to one of the M4 fourth reflective surfaces; when M3 > M4, each of the M4 fourth reflective surfaces is parallel to one of the M3 third reflective surfaces. The included angle θ3 between any two adjacent third reflective surfaces satisfies: 60°≤θ3≤120°, and the included angle θ4 between any two adjacent fourth reflective surfaces satisfies: 60°≤θ4≤120°.

6. The camera module according to claim 5, characterized in that, |M3-M4|=1, where, When M3 > M4, the last third reflective surface bends towards the third optical path folding element and is used to reflect the light from the previous third reflective surface from the last third reflective surface to the second image sensor along a first direction, wherein the first direction is the direction from the first optical path folding element to the third optical path folding element, and the last third reflective surface refers to the third reflective surface that is furthest away from the second optical lens assembly. When M3 < M4, the last fourth reflective surface bends towards the second optical path folding element and is used to reflect the light from the previous fourth reflective surface from the last fourth reflective surface to the second image sensor along the second direction, wherein the second direction is the direction from the third optical path folding element to the first optical path folding element, and the last fourth reflective surface refers to the fourth reflective surface that is furthest away from the second optical lens assembly.

7. The camera module according to claim 2, characterized in that, M2 = M3, with M2 second reflective surfaces corresponding one-to-one with M3 third reflective surfaces. Each pair of corresponding second and third reflective surfaces are arranged opposite to each other and are parallel to each other.

8. The camera module according to claim 2, characterized in that, M2 = M3, and the M2 second reflective surfaces correspond one-to-one with the M3 third reflective surfaces. Each pair of corresponding second and third reflective surfaces are set opposite to each other, and the included angle θ5 between each pair of corresponding second and third reflective surfaces satisfies: 0° < θ5 < 180°.

9. The camera module according to claim 2, characterized in that, At least a portion of the M1 first reflecting surfaces are reflecting surfaces of plane mirrors, and / or at least a portion of the first reflecting surfaces are the inner or outer side of the right-angled face of a right-angled prism. At least a portion of the M2 second reflecting surfaces are reflecting surfaces of plane mirrors, and / or at least a portion of the second reflecting surfaces are the inner or outer side of the right-angled face of a right-angled prism; At least a portion of the M3 third reflecting surfaces are reflecting surfaces of plane mirrors, and / or at least a portion of the third reflecting surfaces are the inner or outer side of the right-angled face of a right-angled prism; At least a portion of the M4 fourth reflecting surfaces are reflecting surfaces of plane mirrors, and / or at least a portion of the fourth reflecting surfaces are the inner or outer side of the right-angled face of a right-angled prism.

10. The camera module according to claim 2, characterized in that, The second optical path folding element includes at least one right-angled prism; The inner sides of the two right-angled faces of each right-angled prism face the first optical path folding element and form two second reflective surfaces; The outer sides of the two right-angled faces of each right-angled prism face towards the third optical path folding element, forming two third reflective surfaces.

11. The camera module according to claim 2, characterized in that, The second optical path folding element includes at least one plane mirror; One side of each of the plane mirrors faces the first optical path folding element and forms a second reflective surface, while the other side faces the third optical path folding element and forms a third reflective surface.

12. The camera module according to any one of claims 1 to 11, characterized in that, The camera module also includes a driving component; The driving component is used to adjust the distance between the first optical path folding element and the second optical path folding element so that light from the first optical lens assembly is focused onto the first image sensor, and to adjust the distance between the second optical path folding element and the third optical path folding element so that light from the second optical lens assembly is focused onto the second image sensor.

13. The camera module according to claim 12, characterized in that, The driving component is specifically used for: The second optical path folding element is driven to move closer to the first optical path folding element, or to move closer to the third optical path folding element.

14. The camera module according to claim 12, characterized in that, The driving component is specifically used for: Drive the first optical path folding element closer to or further away from the second optical path folding element; and Drive the third optical path folding element to move closer to or further away from the second optical path folding element.

15. A terminal device, characterized in that, include: A protective casing, and a camera module as described in any one of claims 1 to 14; The camera module is located inside the protective shell.

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