Ranging assembly and electronic device

Abstract

The application provides a ranging assembly and an electronic device. The ranging assembly comprises a ranging module and a light-transmitting cover plate. The ranging module comprises a transmitting module and a receiving module. The light-transmitting cover plate is located at a first side of the ranging module, the first side being a light-outgoing side of the transmitting module and a light-entering side of the receiving module. One side of the light-transmitting cover plate facing the ranging module is provided with a groove, the position of the groove corresponding to the position of a light-inlet of the receiving module. The light-transmitting cover plate has a first part corresponding to a light-outlet of the transmitting module. The ranging assembly further comprises a light-blocking structure. The light-blocking structure is located between the light-transmitting cover plate and the ranging module. At least part of the light-blocking structure is located between the groove and the first part. The light-blocking structure is used for absorbing or blocking light. The ranging assembly and the electronic device provided by the application can reduce stray light crosstalk and improve the quality of the camera module in the electronic device.

Description

Technical Field

[0001] This application relates to the field of electronic devices, and more particularly to a ranging component and an electronic device. Background Technology

[0002] Three-dimensional (3D) imaging technology is more popular than ordinary two-dimensional imaging technology because it can obtain depth information of objects, and it is widely used in electronic devices. However, the ranging components used in current 3D imaging modules suffer from stray light crosstalk, resulting in a poor user experience. Summary of the Invention

[0003] This application provides a ranging component and an electronic device that improves the problem of stray light crosstalk in the ranging component and the electronic device.

[0004] To achieve the above objectives, this application adopts the following technical solution:

[0005] In a first aspect, a ranging assembly is provided. The ranging assembly includes a ranging module and a light-transmitting cover. The ranging module includes a transmitting module and a receiving module. The light-transmitting cover is located on a first side of the ranging module, which is the light-emitting side of the transmitting module and the light-incident side of the receiving module. A groove is provided on the side of the light-transmitting cover facing the ranging module, and the position of the groove corresponds to the position of the light-incident port of the receiving module.

[0006] The ranging component provided in this application embodiment changes the shape of the traditional planar light-transmitting cover. A groove is provided on the side of the light-transmitting cover facing the ranging module, and the position of the groove corresponds to the position of the light inlet of the receiving module. This can reduce or eliminate the first and second stray lights to a certain extent, thereby reducing the noise of the data obtained by the ranging module, improving the measurement accuracy of the ranging module, and enhancing the quality of the mobile phone camera module.

[0007] In some embodiments, the light-transmitting cover has a first portion corresponding to the light-emitting port of the emitting module. The ranging assembly also includes a light-shielding structure. The light-shielding structure is located between the light-transmitting cover and the ranging module. At least a portion of the light-shielding structure is located between the recess and the first portion. The light-shielding structure is used to absorb or block light.

[0008] At least part of the light-shielding structure is located between the groove and the first part. On the one hand, it can block the detection light emitted by the transmitting module in the ranging module from entering the receiving module through the gap between the light-transmitting cover and the ranging module. On the other hand, when the light-shielding structure has the function of absorbing light, it can absorb at least part of the detection light when the detection light propagates from the side where the transmitting module is located to the receiving module through the light-transmitting cover, thereby reducing the risk of the detection light entering the receiving module through the light-transmitting cover, which can reduce the amount of first stray light entering the image sensor.

[0009] In some embodiments, the light-shielding structure has a first light-shielding portion and a second light-shielding portion. The first light-shielding portion is disposed around the groove and forms a first light-transmitting opening. The second light-shielding portion is disposed around the light-emitting opening of the emitting module and forms a second light-transmitting opening.

[0010] The first light-shielding part can filter out at least part of the aforementioned first stray light, and in conjunction with the aforementioned groove, the effect of filtering out the first stray light is even better. The second light-filtering part can absorb at least part of the light emitted by the emitting module when it shines on the light-shielding structure, thereby reducing the risk of these lights interfering with the adjacent front camera module or rear camera module after being emitted by the ranging component.

[0011] In some embodiments, the first light-transmitting aperture is a cylindrical aperture. The diameter of the first light-transmitting aperture is greater than or equal to the diameter of the first target circle. The first target circle is the circle intersecting the boundary line corresponding to the mechanical field of view of the receiving module and the side of the light-transmitting cover plate facing the ranging module. This allows the diameter of the first light-transmitting aperture to be large enough that reflected light within the mechanical field of view of the lens can enter the receiving module through the first light-transmitting aperture, thereby increasing the amount of reflected light entering the image sensor and contributing to the accurate measurement of the receiving module.

[0012] In some embodiments, the second light-transmitting opening is a cylindrical opening. The diameter of the second light-transmitting opening is greater than or equal to the diameter of the second target circle. The second target circle is the circle intersecting the boundary line corresponding to the effective field of view of the transmitting module and the side of the light-transmitting cover plate facing the ranging module. This ensures that the diameter of the second light-transmitting opening is large enough to not obstruct the emission of the detection light within the effective field of view, so that the detection range of the ranging module will not change due to the setting of the light-shielding structure.

[0013] In some embodiments, the diameter of the second light-transmitting aperture is less than or equal to the diameter of the third target circle. The third target circle is the circle intersecting the boundary line corresponding to the mechanical field of view of the transmitting module and the side of the light-transmitting cover facing the ranging module. This ensures that the second light-transmitting aperture is not too large, reducing the risk of light emitted from the light source passing through the second light-transmitting aperture out of the mechanical field of view of the transmitting module. This, to a certain extent, reduces the risk of light emitted from the light source interfering with the receiving module and other camera modules adjacent to the ranging module.

[0014] In some embodiments, the first light-shielding portion and the second light-shielding portion at least partially overlap or connect between the groove and the first portion to form a continuous structure. This light-shielding structure can absorb as much light as possible propagating from the transmitting module to the receiving module through the light-transmitting cover, thereby reducing the amount of stray light received by the image sensor and improving measurement accuracy.

[0015] In some embodiments, the light-shielding structure includes a screen-printed structure, which is screen-printed on the side of the light-transmitting cover facing the ranging module. This results in a smaller thickness of the light-shielding structure, making it easier for the phone to meet the design requirements of being thin and light. Furthermore, when the light-shielding structure uses a black ink layer, it can absorb light and reduce the amount of reflected light within the light-transmitting cover.

[0016] In some embodiments, the light-shielding structure includes a flexible structure. The light-shielding structure may consist only of a flexible structure, or it may include other structures besides the flexible structure, such as a black ink layer screen-printed on the light-transmitting cover. The flexible structure not only blocks light from passing through but also provides a buffer between the light-transmitting cover and the ranging module, reducing the risk of hard collisions between them during use, improving the stability of the phone structure, and extending the phone's lifespan.

[0017] In some embodiments, the receiving module includes a lens, a filter, and an image sensor. The lens is positioned opposite to a light-transmitting cover plate and is used to receive and shape reflected light from the target object. The filter is located on the light-emitting side of the lens and allows reflected light matching the wavelength of the probe light to pass through. The image sensor is located on the light-emitting side of the filter and is used to receive and process the reflected light passing through the filter, and convert the optical signal corresponding to the reflected light into an electrical signal.

[0018] The lens meets the following conditions:

[0019] MFOV / 2 - FOV / 2 ≥ 1°;

[0020] Here, FOV is the effective field of view of the lens; MFOV is the mechanical field of view of the lens.

[0021] In this way, only the reflected light within the effective field of view in the center of the lens is received and processed by the image sensor. This reduces interference from edge light, minimizes noise in the light signal acquired by the receiving module, and improves measurement accuracy. Furthermore, a larger effective field of view in the receiving module means more pixels and a larger data volume. Since the effective field of view of the receiving module is more than two degrees smaller than the mechanical field of view, unnecessary pixels and data volume are reduced, lowering the processing burden on the image sensor and the control chip electrically connected to it, thus improving the phone's response speed and efficiency.

[0022] In some embodiments, the light-shielding structure satisfies the following conditions:

[0023] R1≥Z gap1 ×tan(MFOV / 2)+R0;

[0024] Wherein, R1 is the radius of the circle where the groove and the side of the light-transmitting cover face towards the ranging module intersect, and it is also the radius of the first light-transmitting opening; Z gap1 R0 is the vertical distance from the vertex of the lens to the planar portion of the light-transmitting cover facing the lens; R0 is the distance between the boundary line of the mechanical field of view of the lens and the tangent of the vertex of the lens.

[0025] If R1 satisfies the above conditions, the diameter of the first light-transmitting port can be large enough so that all reflected light within the mechanical field of view of the lens can enter the receiving module through the first light-transmitting port. This results in more reflected light entering the image sensor, which helps the receiving module to make accurate measurements.

[0026] In some embodiments, the transmitting module satisfies the following conditions:

[0027] (D-MFOV) / 2-(D-FOV) / 2≥1°;

[0028] Wherein, D-MFOV is the mechanical field of view of the launch module, and D-FOV is the effective field of view of the launch module.

[0029] This can exclude edge areas with poor light uniformity in the mechanical field of view from the effective field of view, so that the detection light emitted through the effective field of view is evenly distributed, and the uniformity of the reflected light received by the receiving module will also be better, which can improve the measurement accuracy to a certain extent.

[0030] In some embodiments, the emitting module includes a light source and a diffuser. The diffuser is located on the light-emitting side of the light source.

[0031] The light-shielding structure must meet the following conditions:

[0032]

[0033] Where R2 is the radius of the circle intersecting the boundary line corresponding to the mechanical field of view of the transmitting module and the side of the light-transmitting cover facing the transmitting module, and is also the radius of the second light-transmitting opening; R3 is half the lateral dimension of the light source, which is the dimension in the arrangement direction of the transmitting and receiving modules; airgap is the distance between the light source and the diffuser in the transmitting module; d1 is the thickness of the diffuser; n is the refractive index of the diffuser; θ is the divergence angle of the light source; z gap2 It is the distance between the diffuser and the light-transmitting cover.

[0034] R2 satisfies the above conditions, which allows the diameter of the second light-transmitting port to be large enough so as not to obstruct the emission of the detection light located within the effective field of view, so that the detection range of the ranging module will not be changed due to the setting of the light-shielding structure.

[0035] In some embodiments, the light-shielding structure also satisfies the following conditions:

[0036]

[0037] R2 satisfies the above conditions, ensuring that the diameter of the second light-transmitting port is not too large. This reduces the amount of light emitted from the light source that exits beyond the mechanical field of view of the transmitting module through the second light-transmitting port, thereby reducing the risk of light emitted from the light source interfering with the receiving module and other camera modules adjacent to the ranging module to a certain extent.

[0038] In some embodiments, the light-shielding structure satisfies the following conditions:

[0039] 0≤h≤H-(R1+R2);

[0040] Where H is the distance between the optical axis of the transmitting module and the optical axis of the receiving module; h is the minimum lateral dimension of the portion of the light-shielding structure located between the first and second light-transmitting openings; R1 is the radius of the intersection circle of the groove and the side of the light-transmitting cover plate facing the ranging module, which is also the radius of the first light-transmitting opening; R2 is the radius of the intersection circle of the boundary line corresponding to the mechanical field of view of the transmitting module and the side of the light-transmitting cover plate facing the ranging module, which is also the radius of the second light-transmitting opening.

[0041] The continuous structure satisfies the above constraints, ensuring that the connection structure does not affect the aperture of the first and second light-transmitting ports. At the same time, it can absorb the light propagating from the transmitting module to the receiving module through the light-transmitting cover, thereby reducing the amount of stray light.

[0042] In some embodiments, the surface of the groove is curved. A curved surface is easier to fabricate than an uneven microstructure. Furthermore, since the curved surface of the groove is similar to the surface shape of a lens, designers can easily adjust the optical parameters of the lens, such as the radius of curvature and back focal length, based on the influence of the groove's formation on the amount of light received by the receiving module. This ensures that the groove design has little or no impact on the ranging effect of the ranging module. For example, by adjusting the optical parameters of the lens, such as the radius of curvature and optical power, the focusing effect of the lens on the reflected light entering the receiving module can be enhanced, thus ensuring that the amount of light signal acquired by the image sensor is comparable before and after the groove is set.

[0043] In some embodiments, the groove satisfies the following condition:

[0044] 1>d² / D≥1 / 3;

[0045] Where D is the thickness of the light-transmitting cover, and d2 is the distance from the apex of the groove to the side of the light-transmitting cover away from the ranging module.

[0046] The groove meets the above conditions, which ensures that the setting of the groove does not adversely affect the structural stability of the light-transmitting cover plate, and at the same time, the setting of the groove has a good filtering effect on the first and second stray light.

[0047] Secondly, an electronic device is provided. The electronic device includes a support device, a camera module mounted on the support device, and a ranging component provided by any of the above-described solutions. The camera module includes a first camera module, the ranging component and the first camera module are located on the same side of the support device, the ranging module and the first camera module share the same light-transmitting cover, and the first camera module is either a front-facing camera module or a rear-facing camera module.

[0048] Thirdly, an electronic device is provided. The electronic device includes a support device, a camera module mounted on the support device, and a ranging component provided by any of the above-described solutions. The camera module includes a front-facing camera module and a rear-facing camera module. Two ranging components are provided; one ranging component and the front-facing camera module are both located on the front of the support device, and the ranging module in this component shares the same light-transmitting cover plate as the front-facing camera module; the other ranging component and the rear-facing camera module are both located on the front of the support device, and the ranging module in this component shares the same light-transmitting cover plate as the rear-facing camera module.

[0049] In the second and third aspects, the provided electronic devices all include the ranging component provided in any of the above embodiments, which can reduce the risk of the first stray light and the second stray light entering the image sensor to a certain extent, improve the accuracy of ranging, and enhance the quality of the camera module in the electronic device. Attached Figure Description

[0050] Figure 1 A perspective structural diagram of a mobile phone provided in an embodiment of this application;

[0051] Figure 2 A partial cross-sectional view of a mobile phone provided in an embodiment of this application;

[0052] Figure 3 This is a schematic diagram of the internal structure of a mobile phone provided in an embodiment of this application;

[0053] Figure 4 This is a schematic diagram of the structure of a ranging module provided in an embodiment of this application;

[0054] Figure 5 for Figure 4 A schematic diagram of the front view structure of the ranging module shown.

[0055] Figure 6 For along Figure 5 Schematic diagram of the cross-sectional structure along line AA;

[0056] Figure 7 This is a cross-sectional view of a ranging module in a mobile phone according to an embodiment of this application. The arrows in the figure indicate the propagation path of the detection light from the transmitting module through the light-transmitting cover to the receiving module.

[0057] Figure 8 This is a cross-sectional view of a ranging module in a mobile phone according to an embodiment of this application. The arrows in the figure indicate the propagation path of the reflected light after entering the receiving module, being reflected by the filter, and then entering the image sensor.

[0058] Figure 9 This diagram illustrates the location of stray light in images captured by a camera module under different conditions. The arrows in the diagram indicate the location of the stray light.

[0059] Figure 10 A cross-sectional view of a ranging component provided in another embodiment of this application;

[0060] Figure 11 To adopt Figure 10 The diagram shown illustrates the propagation path of the probe light through the light-transmitting cover when using a ranging component. The arrows in the diagram indicate the direction of the probe light's propagation.

[0061] Figure 12 To adopt Figure 10 The diagram shown illustrates the propagation path of reflected light through the light-transmitting cover plate after being reflected by the filter in the ranging component. The arrows in the diagram indicate the propagation direction of the reflected light.

[0062] Figure 13 A schematic diagram showing the position of the light-shielding structure on the light-transmitting cover plate in a ranging component provided in an embodiment of this application;

[0063] Figure 14 A schematic diagram showing the position of the light-shielding structure on the light-transmitting cover in a ranging component provided in another embodiment of this application;

[0064] Figure 15 A schematic diagram showing the position of the light-shielding structure on the light-transmitting cover in a ranging component provided in another embodiment of this application;

[0065] Figure 16 A cross-sectional view of the assembly structure of the light-shielding structure and the light-transmitting cover plate in a ranging component provided in an embodiment of this application, when the light-shielding structure adopts the third method.

[0066] Figure 17 This is a partial cross-sectional view of the light-shielding structure in a ranging component provided in an embodiment of this application when the light-shielding structure adopts the third method. The cross-sectional lines are not shown in the figure.

[0067] Explanation of reference numerals in the attached figures:

[0068] 10. Support device; 11. Frame; 12. Housing; 13. Mounting cavity; 20. Screen assembly; 21. Main display screen; 22. Rear display screen; 30. Battery; 40. Circuit board assembly; 50. Camera module; 51. Front camera module; 52. Rear camera module; 53. Ranging module; 60. Electrical connector; 70. Light-transmitting cover; 71. First part; 80. Groove; 90. Light-shielding structure; 91. First light-shielding part; 92. Second light-shielding part; 93. First light-transmitting opening; 94. Second light-transmitting opening;

[0069] 531. Transmitting module; 532. Receiving module; 533. Fixing structure; 535. Shielding cover; 536. Silver paste; 537. Flexible circuit board;

[0070] 5311, Driver; 5312, Light source; 5313, Diffuser; 5321, Lens; 5322, Filter; 5323, Image sensor;

[0071] a. First cavity; b. Second cavity; c. First light-transmitting aperture; d. Second light-transmitting aperture; L4. Optical axis of the transmitting module; L5. Optical axis of the receiving module. Detailed Implementation

[0072] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0073] In the description of this application, it should be understood that the terms "inner" and "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0074] To facilitate a clear description of the technical solutions in the embodiments of this application, the terms "first" and "second" are used in the embodiments of this application to distinguish identical or similar items with essentially the same function and effect. For example, the first limiting part and the second limiting part are only used to distinguish different limiting parts and do not limit their order. Those skilled in the art will understand that the terms "first" and "second" do not limit the quantity or execution order, and the terms "first" and "second" are not necessarily different.

[0075] It should be noted that in this application, the terms "in one embodiment" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "in one embodiment" or "for example" in this application should not be construed as being more preferred or advantageous than other embodiments or design solutions. Specifically, the use of terms such as "in one embodiment" or "for example" is intended to present the relevant concepts in a specific manner.

[0076] In this application, unless otherwise expressly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0077] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments.

[0078] For ease of understanding, the technical terms used in this application will be explained and described below.

[0079] 3D imaging technology: is an imaging technology that creates a three-dimensional effect of an object by capturing its depth information.

[0080] Lens: A component that includes at least one lens and is capable of using the refraction principle of a lens to make light from a scene form a clear image on a focal plane.

[0081] The divergence angle of a light source refers to the angle at which a beam of light spreads outward from the waist of the light source (usually the narrowest point of the beam).

[0082] Effective field of view: refers to the field of view of the transmitting and receiving modules that can maintain high imaging quality (such as sharpness and contrast) during the imaging process of the ranging module.

[0083] Mechanical field of view: For a transmitting module, the mechanical field of view is the angle of the maximum spatial range that can be observed or detected, with the light source as the vertex. For a receiving module, the mechanical field of view is the angle formed by the two edges of the maximum physical range through which the image of the target object can pass, with the lens as the vertex. This angle is determined by both the mechanical structure design and the physical characteristics of the lens. This angle determines the field of view that the device can observe.

[0084] Radius of curvature: Curvature is a numerical value used to represent the degree of bending of a curve at a certain point. The greater the curvature, the greater the degree of bending of the curve. The reciprocal of curvature is the radius of curvature.

[0085] Back Focal Length (BFL): The minimum distance between the surface of the last lens element and the image plane. Optical back focal length is a crucial parameter in optical lens design, determining the lens's image quality and applicability.

[0086] Optical axis: refers to the center line of the light beam (light column) passing through the transmitting or receiving module, or the axis of symmetry of the transmitting or receiving module. The light beam should not undergo any change in optical properties when rotating around this axis.

[0087] Three-dimensional (3D) imaging technology is more popular than ordinary two-dimensional (2D) imaging technology due to its ability to acquire depth information of objects, and is widely used in electronic devices. 3D imaging technologies mainly include structured light technology and time-of-flight (TOF) technology. Structured light technology uses an invisible laser of a specific wavelength as a light source, projecting light carrying coded information onto a target object. A camera then captures the coded pattern on the target object, and the distortion of this pattern is calculated using appropriate devices and algorithms to obtain the target object's position and depth information. TOF technology uses the time of flight of light to determine distance. Specifically, TOF technology emits a light pulse signal (hereinafter referred to as the probe light) onto the target object, then uses a sensor to receive the reflected light. The time difference between the reflected light and the probe light is used to calculate and convert parameters such as the target object's depth information.

[0088] This application provides an electronic device. This electronic device includes, but is not limited to, mobile phones, tablets, laptops, desktop computers, multimedia players, in-vehicle devices, wearable devices, and cameras. Wearable devices include, but are not limited to, smartwatches, smart head-mounted displays, and smart glasses.

[0089] For ease of explanation, the following embodiments use a mobile phone as an example. It is understood that when the electronic device is another electronic device, such as a tablet computer or a camera, a similar setup to that of a mobile phone can be used to achieve 3D imaging, which will not be described in detail below.

[0090] Figure 1 This is a perspective structural diagram of a mobile phone provided in an embodiment of this application. Figure 1 As shown, the mobile phone includes a support device 10 and a screen assembly 20 disposed on the support device 10.

[0091] Figure 2 This is a partial cross-sectional view of a mobile phone provided in an embodiment of this application. Figure 2 As shown, the support device 10 includes a frame 11 and a housing 12. One or more frames 11 can be provided. When only one frame 11 is provided, the phone is not foldable and is a tablet phone, such as... Figure 1 As shown. When there are two or more frames 11, adjacent frames 11 are rotatably connected by a pivot. The ends of adjacent frames 11 near the pivot can rotate around the pivot, so that the ends of the two frames 11 opposite to the pivot are relatively opposite or relatively close, and the mobile phone can be in different states such as unfolded state or folded state accordingly.

[0092] Each frame 11 is provided with a housing 12. The housing 12 can be a one-piece molded structure or composed of multiple parts. The housing 12 may be located only on one side of the frame 11, such as... Figure 2 As shown, the housing 12 is located only on the back of the frame 11, forming an installation cavity 13 with the frame 11. Alternatively, the housing 12 may be located partly on the front of the frame 11 and partly on the back of the frame 11, depending on the usage requirements.

[0093] It is understandable that when there are two or more frames 11, the shape and structure of the shell 12 on each frame 11 can be the same or different, depending on the usage requirements.

[0094] The screen assembly 20 includes a main display screen 21 covering the front of the support device 10. When there is one main display screen 21 in the frame 11, it can be a flexible display screen or a rigid display screen, depending on the usage requirements; when there are two or more main display screens in the frame 11, it is a flexible display screen, which can be folded or unfolded according to the position changes between adjacent frames 11.

[0095] In addition, such as Figure 2 As shown, some mobile phone screen components 20 also include a rear display screen 22. The rear display screen 22 is located on the back of the support device 10, opposite to the main display screen 21, and the size of the rear display screen 22 is generally smaller than the size of the main display screen 21. When there are two or more frames 11, the rear display screen 22 can be located on the back of only one frame 11, or it can cover multiple frames 11, depending on the usage requirements.

[0096] The front and back sides of the aforementioned support device 10 refer to the two large surfaces of the support device 10. The front side of the support device 10 is the side used to mount the main display screen 21, and the back side of the support device 10 is the side opposite to the front side, and also the side opposite to the rear display screen 22. It can be understood that the support device 10, in its unfolded state, is generally a three-dimensional structure with a certain length, width, and height, and generally has six sides. The aforementioned large surfaces refer to the sides with a larger surface area than the other sides.

[0097] Figure 3 This is a schematic diagram of the internal structure of a mobile phone according to an embodiment of this application. The main display screen is not shown in the figure. Figure 3 As shown, in addition to the support device and screen assembly, a mobile phone generally also includes a battery 30, a circuit board assembly 40 and a camera module 50 mounted on the support device.

[0098] Generally, each frame 11 is equipped with at least one battery 30 and at least one circuit board assembly 40. In other cases, some mobile phones have more than two frames 11, and only some frames 11 may be equipped with the battery 30 and / or circuit board assembly 40, while some frames 11 may not be equipped with the battery 30 and / or circuit board assembly 40. The specific configuration can be set according to the usage requirements, and there is no unique limitation here.

[0099] The circuit board assembly 40 generally includes a circuit board and electronic components mounted on the circuit board. These electronic components include, but are not limited to, processors, antenna modules, Bluetooth modules, WiFi (Wireless-Fidelity) modules, GPS (Global Positioning System) modules, power and charging modules, or screen display and operation modules. The screen assembly needs to be electrically connected to the aforementioned screen display and operation modules to enable it to display or operate functions. The layout of the electronic components can be determined according to usage requirements. For example, a system-on-chip (SoC) or UFS (Uniform File System) chip can be mounted on one circuit board, while a USB (Universal Serial Bus) interface or SIM (Subscriber Identity Module) card can be mounted on another circuit board; alternatively, a SoC and UFS chip can be mounted on one circuit board, while a USB interface and SIM card can be mounted on another circuit board; or, a SoC and UFS chip can be mounted on one circuit board, while a USB interface and SIM card can be mounted on another circuit board. The USB interface mentioned above can be of type-A, type-B, type-C or other types depending on the needs of use, and there is no single limitation here.

[0100] Typically, the battery 30 is electrically connected to one or more circuit board assemblies 40 located on the same frame 11 via an electrical connector 60. Circuit board assemblies 40 located on the same frame 11 or different frames 11 can also be electrically connected via the electrical connector 60. The electrical connector 60 can be a flexible circuit board, a wire, a spring, etc., depending on the application requirements.

[0101] like Figure 2 As shown, the camera module 50 includes a front-facing camera module 51 and / or a rear-facing camera module 52. The front-facing camera module 51 is located on the front of the support device (which is also the front of the frame 11) and is used to capture the image in front of the main display screen 21; the rear-facing camera module 52 is located on the back of the support device (which is also the back of the frame 11) and is used to capture the image in front of the back of the phone.

[0102] The aforementioned front-facing camera module 51 and rear-facing camera module 52 can each consist of one camera or multiple cameras. When the front-facing camera module 51 or the rear-facing camera module 52 consists of multiple cameras, one camera can be the main camera, and the others can be auxiliary cameras. The structure and function of each camera can be the same or different. For example, when the rear-facing camera module 52 consists of two cameras, one camera can be used to acquire color images as the main camera, and the other camera can be used to acquire black and white images as an auxiliary camera. The phone can combine the images acquired by the two cameras to form a combined image with a higher clarity than the aforementioned color and black and white images. Alternatively, both cameras can be used to acquire color images, but at least one of the parameters—field of view, focal length, or other optical parameters—is different. The two cameras can be used separately in different scenarios or used together in the same scenario to obtain a clearer image.

[0103] like Figure 1 and Figure 3 As shown, in addition to the aforementioned front-facing camera module 51 and / or rear-facing camera module 52, the camera module 50 also includes a ranging module 53 to enable the phone to achieve 3D imaging. One or more ranging modules 53 can be provided, and they are generally used in conjunction with the front-facing camera module 51 and / or rear-facing camera module 52. For example... Figure 1 As shown, when used in conjunction with the front-facing camera module 51, the ranging module 53 is positioned on the front of the support device 10 to detect the distance between the phone and an object located in front of the main display screen 21; Figure 3 As shown, when used in conjunction with the rear camera module 52, the ranging module 53 is located on the back of the support device (i.e., the back of the frame 11) and is used to detect the distance between the phone and objects in front of the back of the phone.

[0104] Understandably, within the same mobile phone, depending on usage requirements, a ranging module 53 may be provided only for use with the front-facing camera module 51, or only for use with the rear-facing camera module 52, or both. Depending on imaging and design needs, the ranging module 53 can be positioned adjacent to or spaced apart from the front-facing camera module 51 or the rear-facing camera module 52.

[0105] The ranging module 53 can be a structured light module using structured light technology or a TOF module using TOF technology. The structured light module generally includes a projection module, a camera module, and an image processing unit. The projection module can be a projector used to project coded light (i.e., light carrying coded information) onto the target object, forming a coded pattern on the object's surface. The camera module can be an infrared camera or an RGB camera (i.e., a camera using RGB color mode, where R represents red, G represents green, and B represents blue), used to capture the coded pattern formed on the target object after the coded light shines on it, and convert the captured light signal into an electrical signal, providing a data basis for subsequent 3D reconstruction. The image processing unit includes at least one processing chip used to receive and process the electrical signal output from the camera module, and obtain the 3D morphological information of the target object (including but not limited to the target object's position and depth information) by calculating the distortion of the acquired coded pattern. The RGB color model mentioned above is an industry color standard. It obtains various colors by changing the three color channels of red (R), green (G), and blue (B) and superimposing them. RGB represents the colors of the three channels of red, green, and blue.

[0106] Figure 4 This is a schematic diagram of the structure of a ranging module provided in an embodiment of this application. The ranging module is a TOF module. Figure 4 As shown, the TOF module includes a transmitter module 531 and a receiver module 532. Figure 5 for Figure 4 The diagram shows the front view of the ranging module. Figure 6 For along Figure 5 A cross-sectional view along line AA. (e.g.) Figure 5 and Figure 6As shown, the transmitting module 531 includes a driver 5311, a light source 5312, and a diffuser 5313 located on the light-emitting side of the light source 5312. The receiving module 532 includes a lens 5321, a filter 5322, and an image sensor 5323 arranged sequentially along the propagation direction of the reflected light.

[0107] The light source 5312 typically uses a light-emitting diode (LED) or a laser emitter. Both LEDs and laser emitters generally emit infrared light. This infrared light typically has a wavelength of around 940nm, falling within the visible light range. This wavelength has the lowest quantity in the spectrum, reducing interference from ambient light on the ranging results, improving the stability and accuracy of the TOF module's ranging, and minimizing harm to human or animal targets, thus enhancing the safety of the ranging module 53. The laser emitter can be a vertical-cavity surface-emitting laser (VCSEL), or other types of lasers (such as edge-emitting semiconductor lasers, Fabry-Perot lasers, distributed feedback lasers, etc.), depending on the specific application requirements.

[0108] The driver 5311 is used to control the emission of the light source 5312 (including but not limited to controlling the working state of the light source 5312 and optimizing the waveform of the beam emitted by the light source 5312) to ensure that the beam emitted by the light source 5312 has sufficient accuracy and stability.

[0109] The diffuser 5313 is an optional component used to diffuse the light beam emitted by the light source 5312 into a more uniform surface light source to cover a larger measurement area. For ease of description, the light beam emitted by the emission module 531 will be referred to as the probe light, and the light beam emitted after passing through the diffuser 5313 will be referred to as the probe light.

[0110] Lens 5321 is used to converge the light emitted by the aforementioned transmitting module and reflected back by the target object. Lens 5321 generally includes one or more lenses. For ease of description, the light reflected back by the target object will be referred to as reflected light.

[0111] Filter 5322 is typically a narrowband filter used to allow reflected light with the same wavelength as the probe light (i.e., reflected light with a wavelength of around 940 nm) to pass through and reach the image sensor 5323, while blocking or absorbing reflected light of other wavelengths, thereby suppressing incoherent light and reducing background noise. The aforementioned incoherent light refers to reflected light with a wavelength different from the probe light. Background noise is all interference acquired during the ranging module's measurement process that is unrelated to the useful signal.

[0112] Image sensor 5323 is used to receive reflected light passing through filter 5322 and convert the optical signal into an electrical signal.

[0113] Because TOF modules have advantages such as high transmission speed, simple structure, and convenient program processing, they are more popular than structured light modules. For ease of description, the following will use the ranging module 53 as an example to explain the installation method and working principle of the ranging module 53.

[0114] The above-mentioned TOF module can be as follows Figure 3 As shown, the TOF module can be directly installed on one of the circuit board components 40 in the mobile phone, such as the circuit board component 40 where the front camera module or the rear camera module is located. In addition, the TOF module can also be installed on a separate circuit board and then connected to any circuit board component 40 through the circuit board or other electrical connectors 60.

[0115] like Figures 4 to 6 As shown, the TOF module is mounted on a flexible circuit board 537. The light source 5312, driver 5311, and image sensor 5323 in the TOF module are all fixed on the flexible circuit board 537 and electrically connected to it. These electrical connections can be achieved through soldering, spring contacts, connectors, etc. The flexible circuit board 537 has interface circuitry. The TOF module is electrically connected to any circuit board assembly in the mobile phone via this flexible circuit board 537. A control chip, such as a SOC chip, CPU, or AP (Application Processor), can be installed on the circuit board assembly electrically connected to the TOF module. This control chip can contain an algorithm calculation unit. The control chip can receive the electrical signals output by the image sensor 5323 and analyze these signals to derive the corresponding parameters of the target object (such as depth parameters, position parameters, etc.).

[0116] like Figure 6As shown, in addition to the transmitting module 531 and the receiving module 532, the TOF module also includes a fixing structure 533, within which both the transmitting module 531 and the receiving module 532 are installed. The fixing structure 533 protects the internal components of the TOF module and ensures its stable installation in the mobile phone. Specifically, the fixing structure 533 can be made of insulating materials, such as plastic, composite materials, or resin, or it can be made of metal, depending on the application requirements. The fixing structure 533 can be a one-piece molded structure or a combination structure composed of multiple components. It can be glued to the circuit board containing the transmitting module 531 and the receiving module 532, or it can be fixed to the circuit board containing the transmitting module 531 and the receiving module 532 using other fixing methods such as plug-in or snap-fit. The fixing structure 533 has at least two cavities, one cavity containing the transmitting module 531 and the other cavity containing the receiving module 532. Each of the cavities has a light-transmitting hole on the side facing away from the circuit board.

[0117] like Figure 6 As shown, the fixed structure 533 has two cavities, namely a first cavity a and a second cavity b. The first cavity a has a first light-transmitting hole c, and the second cavity b has a second light-transmitting hole d. The transmitting module 531 is located in the first cavity a, wherein the driver 5311 and the light source 5312 are located in the first cavity a and electrically connected to the corresponding circuit board. The diffuser 5313 is located at the first light-transmitting hole c and is connected to the fixed structure 533. The receiving module 532 is located in the second cavity b, wherein the image sensor 5323 is electrically connected to the corresponding circuit board. The filter 5322 is suspended in the second cavity b through a positioning structure located in the second cavity. The lens 5321 is located at the second light-transmitting hole d and is connected to the fixed structure 533, and is spaced apart from the filter 5322.

[0118] To improve the shielding effect of the TOF module, in some embodiments, a shielding cover 535 is also provided over the fixing structure 533. This shielding cover 535 can be fixedly installed on the circuit board where the TOF module is located by welding, plugging, or other methods. The shielding cover 535 is used to isolate the TOF module from other components on the mobile phone, thereby reducing the risk of electromagnetic interference between the TOF module and other components on the mobile phone. To ensure a good shielding effect, silver paste 536 can also be applied at the connection seam between the shielding cover 535 and the corresponding circuit board.

[0119] It is understandable that, in order for the ranging module to work properly, the shielding cover 535 is also provided with light-transmitting holes or openings at the corresponding positions of the first light-transmitting hole c and the second light-transmitting hole d. This ensures that the light emitted by the transmitting module 531 is not blocked by the shielding cover 535, and at the same time, the shielding cover 535 does not block the light reflected by the target object from entering the receiving module 532.

[0120] like Figure 1 and Figure 2 As shown, for aesthetic purposes and to protect the camera module 50, each of the aforementioned camera modules and ranging modules 53 is generally provided with a light-transmitting cover 70. This light-transmitting cover 70 is generally a glass cover, but it can also be a resin cover or a cover made of other materials, as long as it can provide protection and does not affect the normal operation of each camera module and ranging module 53.

[0121] In addition, to reduce the number of phone parts, facilitate assembly, and enhance the phone's aesthetics, the camera module, ranging module 53, and display screen, typically located on the same side of the support device 10, share the same light-transmitting cover 70. For example... Figure 1 As shown, when the front of the support device 10 is equipped with both a front-facing camera module 51 and a ranging module 53, the front-facing camera module 51, the ranging module 53, and the main display screen 21 share the same light-transmitting cover plate 70; when the back of the support device 10 is equipped with both a rear-facing camera module 52 and a ranging module 53, but no rear display screen 22 is provided, the rear-facing camera module 52 and the ranging module 53 share the same light-transmitting cover plate 70; when the back of the support device 10 is equipped with both a rear-facing camera module 52, a ranging module 53, and a rear display screen 22, the rear-facing camera module 52, the ranging module 53, and the rear display screen 22 share the same light-transmitting cover plate 70. It is understandable that when the rear support device 10 is equipped with a rear camera module 52, a ranging module 53 and a rear display screen 22, if the rear display screen 22 and the rear camera module 52 and the ranging module 53 are set on different frames 11, the components located on the same frame 11 can share the same light-transmitting cover 70.

[0122] Figure 7 This is a cross-sectional view of a ranging module in a mobile phone according to an embodiment of this application. The arrows in the figure indicate the propagation path of the probe light from the transmitting module through the light-transmitting cover into the receiving module. Figure 7 As shown, since the transmitting module 531 and the receiving module 532 in the ranging module 53 are generally arranged adjacent to each other, when the detection light emitted by the transmitting module 531 passes through the light-transmitting cover 70, some of the light will be reflected multiple times in the light-transmitting cover 70, and finally pass out in the corresponding area of ​​the receiving module 532, and then pass through the lens 5321 and filter 5322 of the receiving module 532 in sequence, and enter the image sensor 5323, forming the first stray light.

[0123] Figure 8 This is a cross-sectional view of a ranging module in a mobile phone according to an embodiment of this application. The arrows in the figure indicate the propagation path of reflected light after entering the receiving module, being reflected again by the filter, and then entering the image sensor. Figure 8As shown, in addition to the first type of stray light, some of the reflected light that passes through the lens 5321 and is incident on the filter 5322 is reflected upon contact with the filter 5322. This reflected light then passes through the light-transmitting cover 70 one or more times before passing sequentially through the lens 5321 and filter 5322 of the receiving module 532, and is received by the image sensor 5323, forming the second type of stray light. This stray light interferes with the measurement results of the ranging module 53, leading to problems such as poor ranging accuracy and shooting accuracy for objects with low reflectivity, such as hair strands, resulting in a poor user experience. Therefore, solving the aforementioned defects in the ranging module is a development direction for 3D imaging modules. Figure 9 As shown, Figure 9 This diagram illustrates the location of stray light in images acquired by a camera module under different conditions. The arrows indicate the locations of the stray light. Figure 9 In the diagram, (a), (b), and (c) represent the possible locations of stray light in the image under three different conditions. It is understandable that stray light in images acquired by the camera module could be located in various locations besides those where it might otherwise be present. Figure 9 Besides appearing in the positions shown in (a), (b), and (c), it may also appear in other positions, which will not be listed here.

[0124] To improve, or at least partially improve, the above-mentioned problems, one embodiment of this application provides a ranging component. Figure 10 This is a cross-sectional view of a ranging component provided in another embodiment of this application. Figure 10 As shown, the ranging assembly includes the aforementioned ranging module 53 and a light-transmitting cover 70. The light-transmitting cover 70 is located on the first side of the ranging module 53. The first side is the light-emitting side of the transmitting module 531 and the light-incoming side of the receiving module 532. A groove 80 is provided on the side of the light-transmitting cover 70 facing the ranging module 53. The position of the groove 80 corresponds to the position of the light inlet of the receiving module 532. "Corresponds" means that... Figure 10 From the viewing angle, the groove 80 is located directly above the light inlet of the receiving module 532. Reflected light passing through the groove 80 can enter the receiving module 532 through the light inlet. The light inlet of the receiving module 532 refers to the opening on the side of the receiving module 532 facing the light-transmitting cover 70 that allows light to pass through.

[0125] It is understood that the aforementioned light inlet is generally defined by the fixed structure 533 and the shielding cover 535, and may also be defined by other structures of the ranging module 53 located on the light-inlet side of the receiving module 532. For example, if the opening of the shielding cover 535 at the receiving module 532 is larger than the opening of the fixed structure 533 at the receiving module 532 (i.e., the aforementioned second light-transmitting hole d), the diameter of the light inlet can be equal to the diameter of the aforementioned second light-transmitting hole d. If the receiving module 532 has an aperture on its light-inlet side, the inner diameter of the aperture is generally smaller than the diameter of the aforementioned second light-transmitting hole d, and also smaller than the size of the opening of the shielding cover 535 at the receiving module 532. In this case, the diameter of the light inlet is generally the inner diameter of the aperture. The receiving module 532 can be exposed through this light inlet, or it can receive light through this light inlet.

[0126] The recess 80 can alter the surface shape of the portion corresponding to the light inlet of the light-transmitting cover 70 and the receiving module 532, causing the direction of light propagation to change when passing through the area where the recess 80 is located. For example... Figure 11 As shown, Figure 11 To adopt Figure 10 The diagram shows the propagation path of the probe light through the light-transmitting cover plate in the ranging component. The arrows in the diagram indicate the propagation direction of the probe light. Part of the probe light is reflected within the light-transmitting cover plate 70 and reaches the inner surface of the groove 80 (the surface within the light-transmitting cover plate where reflection occurs). Since most or all of the inner surface of the groove is no longer perpendicular to the axis of the receiving module (or is curved), the reflected light within the light-transmitting cover plate 70 changes its original propagation direction after reflection by the inner surface of the groove. It then exits through the light-transmitting cover plate 70 in a direction away from the receiving module 532, no longer or with minimal penetration through the light-transmitting cover plate 70 into the receiving module 532. This reduces the probability of these rays exiting from this area and entering the receiving module 532, thereby reducing the probability of the image sensor 5323 receiving the first stray light.

[0127] For the second type of stray light, please refer to... Figure 12 As shown, Figure 12 To adopt Figure 10 The diagram shows the propagation path of reflected light from the filter through the light-transmitting cover plate in the ranging component. The arrows in the diagram indicate the propagation direction of the reflected light. After passing through the light inlet of the receiving module 5322, the reflected light can illuminate the surface of the groove wall of the groove 80. Since most of the groove sidewall is no longer perpendicular to the axis of the receiving module, the reflected light can pass through the light-transmitting cover plate 70 and exit, or be reflected to other areas, without re-entering the receiving module 532 or with minimal re-entry. This reduces the probability of these rays re-entering the receiving module 532, thereby reducing the probability of the image sensor 5323 receiving second stray light.

[0128] In summary, the ranging component provided in this application embodiment changes the shape of the traditional planar light-transmitting cover plate. A groove 80 is provided on the side of the light-transmitting cover plate 70 facing the ranging module 53, and the position of the groove 80 corresponds to the position of the light inlet of the receiving module 532. This can reduce or eliminate the first and second stray lights to a certain extent, thereby reducing the noise of the data obtained by the ranging module, improving the measurement accuracy of the ranging module, and enhancing the quality of the mobile phone camera module.

[0129] The surface of the groove 80 can be a curved surface, such as a spherical cap structure or other curved surfaces, depending on the receiving effect of the ranging module 53.

[0130] The surface of the groove 80 is curved, which is easier to manufacture compared to using uneven microstructures. Furthermore, since the curved surface of the groove 80 is similar to the surface shape of a lens, designers can easily adjust the optical parameters such as the radius of curvature and back focal length of the lens in the lens 5321 based on the impact of the groove 80's formation on the amount of light received by the receiving module 532. This ensures that the design of the groove 80 has little or no impact on the ranging effect of the ranging module 53. For example, by adjusting the optical parameters such as the radius of curvature and optical power of the lens in the lens 5321, the focusing effect of the lens 5321 on the reflected light entering the receiving module 532 can be enhanced, thus ensuring that the amount of light signal acquired by the image sensor 5323 is roughly the same before and after the groove 80 is set.

[0131] In some embodiments, at least one of the transmitting module 531 and the receiving module 532 in the ranging module 53 meets the following condition: the effective field of view is less than the mechanical field of view.

[0132] Since the mechanical field of view is determined by the physical structure of the transmitting module 531, and the edge part of the transmitting module (which is also the edge part of the diffuser 5313) often has a weaker light homogenization effect than other parts due to the influence of optical characteristics, when the transmitting module 531 meets the above conditions, the receiving module 532 can be set to receive only the reflected light corresponding to the probe light emitted within the effective field of view. In this way, the effective field of view of the transmitting module 531 is smaller than the mechanical field of view, which can exclude at least some of the edge areas with poor light homogenization effect in the mechanical field of view from the effective field of view, so that the probe light emitted through the effective field of view is evenly distributed. In this way, the uniformity of the reflected light received by the receiving module 532 will also be better, thereby improving the measurement accuracy to a certain extent.

[0133] Since the mechanical field of view is determined by the physical structure of the lens 5321, and the edge of the lens 5321 often suffers from distortion or image quality degradation due to optical characteristics, when the receiving module 532 meets the above conditions, the receiving module 532 can be configured so that the image sensor 5323 only receives reflected light within the effective field of view of the lens 5321. In this way, the effective field of view of the lens 5321 is smaller than the mechanical field of view, which means that only the reflected light located within the effective field of view in the middle of the lens 5321 will be received and processed by the image sensor 5323. This can reduce the interference of edge light, thereby reducing the noise of the light signal acquired by the receiving module 532 to a certain extent and improving the measurement accuracy.

[0134] The effective field of view of the aforementioned launch module 531 can be more than two degrees smaller than the mechanical field of view. In this case, the launch module 531 can satisfy the following conditions:

[0135] (D-MFOV) / 2-(D-FOV) / 2≥1°;

[0136] Wherein, D-FOV is the effective field of view of the launch module 531; D-MFOV is the mechanical field of view of the launch module 531.

[0137] This can exclude edge areas with poor light uniformity in the mechanical field of view from the effective field of view, so that the detection light emitted through the effective field of view is evenly distributed, thereby making the uniformity of the reflected light received by the receiving module 532 better, which can improve the measurement accuracy to a certain extent.

[0138] The effective field of view of the aforementioned lens 5321 can also be more than two degrees smaller than the mechanical field of view. In this case, the receiving module 532 can meet the following conditions:

[0139] MFOV / 2 - FOV / 2 ≥ 1°;

[0140] Wherein, FOV is the effective field of view of lens 5321; MFOV is the mechanical field of view of lens 5321.

[0141] In this way, only the reflected light located within the effective field of view in the center of the lens 5321 is received and processed by the image sensor 5323 from the reflected light received by the lens 5321. This reduces interference from edge light and, to some extent, decreases the noise in the light signal acquired by the receiving module 532, improving measurement accuracy. Furthermore, in the receiving module 532, a larger effective field of view means more pixels and a larger data volume. Since the effective field of view of the receiving module 532 is more than two degrees smaller than the mechanical field of view, unnecessary pixels and data volume are reduced, lowering the processing burden on the image sensor 5323 and the control chip electrically connected to it, thus improving the phone's response speed and efficiency.

[0142] like Figure 12 As shown, in some embodiments, the light-transmitting cover 70 has a first portion 71 corresponding to the light-emitting port of the emitting module 531. The first portion 71 is used for the detection light emitted by the emitting module 531 to pass through. The size of the first portion 71 can be smaller than, equal to or larger than the size of the light-emitting port of the emitting module 531, depending on the specific application requirements.

[0143] It is understood that the aforementioned light-emitting port is generally defined by the fixed structure 533 and the shielding cover 535, and can also be defined by other structures of the ranging module 53 located on the light-emitting side of the transmitting module 531. For example, if the opening of the shielding cover 535 at the transmitting module 531 is larger than the opening of the fixed structure 533 at the transmitting module 531 (i.e., the aforementioned first light-transmitting hole c), the diameter of the light-emitting port can be equal to the diameter of the aforementioned first light-transmitting hole c. If the light-emitting side of the transmitting module 531 is provided with an aperture, the inner diameter of the aperture is generally smaller than the diameter of the aforementioned first light-transmitting hole c, and also smaller than the size of the opening of the shielding cover 535 at the transmitting module 531. In this case, the diameter of the light-emitting port is generally the inner diameter of the aperture. The transmitting module 531 can be exposed through this light-emitting port, or it can emit light outwards through this light-emitting port.

[0144] Corresponding to the light output port of the transmitting module 531 means that the probe light emitted through the light output port of the transmitting module 531 can be emitted through the first part 71. The first part 71 is Figure 12 The section between the dashed lines L1 and L2. It can be understood that the dashed lines L1 and L2 are auxiliary lines added to facilitate understanding of the first part at position 71, and are not structural lines of the ranging module.

[0145] like Figure 12 As shown, the ranging assembly also includes a light-shielding structure 90. The light-shielding structure 90 is located between the light-transmitting cover 70 and the ranging module 53, with at least a portion of the light-shielding structure 90 situated between the recess 80 and the first portion 71. The light-shielding structure 90 is used to absorb or block light to prevent light from passing through.

[0146] The light-shielding structure 90 can be a screen-printed structure. This screen-printed structure can be an ink layer (such as a black ink layer) screen-printed on the side of the light-transmitting cover 70 facing the ranging module 53. It can also be a flexible structure such as foam or sponge adhered to or embedded between the light-transmitting cover 70 and the ranging module 53. Other structures can also be used, as long as they can absorb or block light shining onto them. It is understandable that when the light-shielding structure 90 is manufactured using screen printing, its thickness is smaller, making it easier for the phone to meet the requirements of a thin and light design. The use of a black ink layer can absorb light, reducing the amount of reflected light within the light-transmitting cover 70. When the light-shielding structure 90 uses foam, sponge, or other structures, it can block light from passing through and also provide a buffer between the light-transmitting cover 70 and the ranging module 53, reducing the risk of hard collisions between them during use, improving the stability of the phone structure, and extending the phone's lifespan. It is understood that in some embodiments, the light-shielding structure 90 may include both the above-mentioned screen-printed structure and the above-mentioned flexible structure, that is, the screen-printed structure and the flexible structure may be used in combination.

[0147] At least a portion of the light-shielding structure 90 is located between the groove 80 and the first portion 71. On the one hand, it can block the detection light emitted by the transmitting module 531 in the ranging module 53 from entering the receiving module 532 through the gap between the light-transmitting cover plate 70 and the ranging module 53. On the other hand, when the light-shielding structure 90 has the function of absorbing light, it can absorb at least a portion of the detection light as it propagates from the side where the transmitting module 531 is located to the receiving module 532 through the light-transmitting cover plate 70, thereby reducing the risk of the detection light being reflected into the receiving module 532 through the light-transmitting cover plate 70. In other words, it can reduce the amount of first stray light entering the image sensor 5323.

[0148] It is understandable that the aforementioned light-shielding structure 90 is generally designed to avoid the light outlet of the transmitting module 531 and the light inlet of the receiving module 532. This ensures that the setting of the light-shielding structure 90 does not reduce the original transmitting field of view of the transmitting module 531 and the original receiving field of view of the receiving module 532, so that the detection range of the ranging module 53 is not affected or is only minimally affected.

[0149] The aforementioned light-shielding structure 90 can be configured in various ways. For ease of understanding, examples are provided below.

[0150] The first method, such as Figure 13 As shown, Figure 13This is a schematic diagram showing the position of the light-shielding structure 90 on the light-transmitting cover plate in a ranging component provided in one embodiment of this application. The light-shielding structure 90 can be provided only around the groove 80. This arrangement of the light-shielding structure 90 allows at least a portion of the probe light entering the light-transmitting cover plate 70 to be absorbed when reflected back to the area where the light-shielding structure 90 is located. This reduces the risk of the probe light passing through the light-transmitting cover plate 70 and illuminating the receiving module 532, or prevents the probe light from entering the receiving module 532 through the gap between the light-transmitting cover plate 70 and the ranging module 53. Using this method, the light-shielding structure 90 can filter out at least a portion of the aforementioned first stray light, and its effect in filtering out the first stray light is even better when combined with the groove 80.

[0151] The second method, such as Figure 14 As shown, Figure 14 This is a schematic diagram showing the position of the light-shielding structure on the light-transmitting cover in a ranging component provided in another embodiment of this application. The light-shielding structure 90 can be arranged only around the first part 71, that is, the light-shielding structure 90 is arranged only around the light outlet of the emitting module 531. In this way, when the light emitted by the emitting module 531 shines on the light-shielding structure 90, at least part of it can be absorbed, thereby reducing the risk that this light, after being emitted by the ranging component, will shine into the adjacent front camera module or rear camera module and cause interference to the front camera module or rear camera module.

[0152] The third method, such as Figure 15 As shown, Figure 15 This is a schematic diagram showing the position of the light-shielding structure on the light-transmitting cover plate in a ranging component provided in another embodiment of this application. A portion of the light-shielding structure 90 is disposed around the first portion 71, and another portion is disposed around the groove 80. For example... Figure 16 As shown, the light-shielding structure 90 may include a first light-shielding part 91 and a second light-shielding part 92. The first light-shielding part 91 surrounds the groove 80 and forms a first light-transmitting opening 93, while the second light-shielding part 92 surrounds the light-emitting opening of the emitting module 531 and forms a second light-transmitting opening 94. The first light-shielding part 91 and the second light-shielding part 92 may be spaced apart, or they may at least partially overlap or be connected to form a continuous structure. Figure 16 As shown, the first light-shielding part 91 and the second light-shielding part 92 are connected, and the dividing line between them is the dashed line L3. It can be understood that the dashed line L3 is an auxiliary line added for ease of understanding and is not a structural line of the light-shielding structure 90.

[0153] The light-shielding structure 90 adopts a third method, which can simultaneously possess the advantages of the first and second methods mentioned above. Furthermore, when the aforementioned continuous structure exists, the light-shielding structure 90 can absorb as much light as possible propagating from the transmitting module 531 to the receiving module 532 via the light-transmitting cover 70, thereby reducing the amount of stray light received by the image sensor 5323 to a certain extent and improving measurement accuracy.

[0154] It is understandable that in the first method described above, the light-shielding structure 90 can be arranged around the groove 80 and form the first light-transmitting opening 93. The shape and size of the first light-transmitting opening 93 can be the same as or different from the shape and size of the light inlet of the receiving module 532, as long as the arrangement of the first light-transmitting opening 93 does not affect the entry of reflected light into the receiving module 532 within the effective field of view.

[0155] In the second method described above, the light-shielding structure 90 can surround the light-emitting port of the transmitting module 531 to form the second light-transmitting port 94. The shape and size of the second light-transmitting port 94 can be the same as or different from the shape and size of the light-emitting port of the transmitting module 531, as long as the setting of the second light-transmitting port 94 does not affect the detection light within the effective field of view from being emitted through the second light-transmitting port 94.

[0156] Figure 17 This is a partial cross-sectional view of a distance measuring component provided in an embodiment of this application, where the light-shielding structure adopts a third method. Section lines are not shown in the figure. Figure 17 As shown, in some embodiments, the first light-transmitting opening 93 is a cylindrical opening. The diameter 2R1 of the first light-transmitting opening 93 is greater than or equal to the diameter of the first target circle. The first target circle is the intersection circle of the boundary line corresponding to the mechanical field of view of the receiving module 532 and the side of the light-transmitting cover plate 70 facing the ranging module.

[0157] This allows the diameter of the first light-transmitting port 93 to be large enough so that all reflected light within the mechanical field of view of the lens 5321 can enter the receiving module 532 through the first light-transmitting port 93. This results in more reflected light entering the image sensor 5323, which helps the receiving module 532 to make accurate measurements.

[0158] In some embodiments, the second light-transmitting aperture 94 is a cylindrical aperture. The diameter 2R2 of the second light-transmitting aperture is greater than or equal to the diameter of the second target circle. The second target circle is the intersection circle of the boundary line corresponding to the effective field of view of the transmitting module 531 and the side of the light-transmitting cover plate 70 facing the ranging module.

[0159] This ensures that the diameter of the second light-transmitting port 94 is large enough to not obstruct the emission of the detection light within the effective field of view, so that the detection range of the ranging module 53 will not be changed due to the setting of the light-shielding structure 90.

[0160] In some embodiments, the diameter 2R2 of the second light-transmitting aperture 94 is less than or equal to the diameter of the third target circle. The third target circle is the intersection circle of the boundary line corresponding to the mechanical field of view of the transmitting module and the side of the light-transmitting cover 70 facing the ranging module.

[0161] This ensures that the second light-transmitting port 94 is not too large, reducing the risk of light emitted from the light source 5312 passing through the second light-transmitting port 94 and exiting out of the mechanical field of view of the transmitting module 531. This, in turn, reduces the risk of light emitted from the light source 5312 interfering with the receiving module 532 and other camera modules adjacent to the ranging module 53.

[0162] When the light-shielding structure 90 adopts the first or third method, in order to ensure that the setting of the light-shielding structure 90 does not adversely affect the ranging effect of the ranging component, in some embodiments, the ranging component satisfies the following constraints:

[0163] R1≥Z gap1 ×tan(MFOV / 2)+R0;

[0164] MFOV / 2 - FOV / 2 ≥ 1°;

[0165] Where R1 is the radius of the intersection circle of the groove 80 and the light-transmitting cover 70 facing the ranging module 53, and is also half the diameter of the first light-transmitting opening 93 when it is a cylindrical opening, that is, the radius of the first light-transmitting opening 93; Z gap1 It is the vertical distance from the vertex P1 of lens 5321 to the planar portion of the light-transmitting cover 70 facing the ranging module 53; FOV is the effective field of view of lens 5321; MFOV is the mechanical field of view of lens 5321; R0 is the distance between the boundary line corresponding to the mechanical field of view of lens 5321 and the tangent corresponding to the vertex P1 of lens 5321.

[0166] If R1 satisfies the above conditions, the diameter 2R1 of the first light-transmitting port 93 can be large enough so that the reflected light within the mechanical field of view of the lens 5321 can enter the receiving module 532 through the first light-transmitting port 93. This results in more reflected light entering the image sensor 5323, which helps the receiving module 532 to make accurate measurements.

[0167] When the light-shielding structure 90 adopts the second or third method, in order to ensure that the setting of the light-shielding structure 90 does not adversely affect the ranging effect of the ranging component, in some embodiments, the ranging component satisfies the following constraints:

[0168]

[0169] Wherein, R3 is half of the lateral dimension of the light source 5312, and the lateral dimension is the direction perpendicular to the thickness of the mobile phone, which is also the arrangement direction X of the transmitting module and the receiving module; the above-mentioned lateral dimension is the dimension in the arrangement direction X of the transmitting module and the receiving module; it can be understood that when the cross-section of the light source 5312 is circular, R3 is the radius of the light source 5312.

[0170] airgap is the distance between the light source 5312 and the diffuser 5313. Figure 17 The distance between the upper surface of the light source 5312 and the lower surface of the diffuser 5313 from the shown viewpoint;

[0171] d1 is the thickness of diffuser 5313, and the refractive index of the material of diffuser 5313 is n;

[0172] θ is the divergence angle of the light source 5312;

[0173] Zgap2 is the distance between diffuser 5313 and light-transmitting cover 70, and also... Figure 17 The distance from the upper surface of the diffuser 5313 to the lower surface of the light-transmitting cover 70 from the shown viewpoint;

[0174] D-FOV is the effective field of view of the 531 launch module;

[0175] D-MFOV is the mechanical field of view of the launch module 531;

[0176] R2 is the radius of the circle where the boundary line corresponding to the mechanical field of view of the transmitting module 531 intersects with the side of the light-transmitting cover 70 facing the transmitting module. It is also half the diameter of the second light-transmitting port 94 when it is a cylindrical port, i.e., the radius of the second light-transmitting port 94.

[0177] R2 satisfies the above conditions, which makes the aperture 2R2 of the second light-transmitting port 94 large enough to not block the emission of the detection light located within the effective field of view, so that the detection range of the ranging module 53 will not be changed due to the setting of the light-shielding structure 90.

[0178] In addition to meeting the above conditions, the ranging component can also satisfy the following constraints:

[0179]

[0180] (D-MFOV) / 2-(D-FOV) / 2≥1°;

[0181] R2 satisfies the above conditions, which ensures that the diameter of the second light-transmitting port 94 is not too large. This reduces the amount of light emitted by the light source 5312 that passes through the second light-transmitting port 94 and exits beyond the mechanical field of view of the transmitting module 531. As a result, the risk of light emitted by the light source 5312 interfering with the receiving module 532 and other camera modules adjacent to the ranging module 53 can be reduced to a certain extent.

[0182] In addition to the constraints mentioned above, when the continuous structure exists, the continuous structure can satisfy the following constraints:

[0183] 0≤h≤H-(R1+R2);

[0184] Where H is the distance between the optical axis L4 of the transmitting module 531 and the optical axis L5 of the receiving module 532;

[0185] h is the minimum lateral dimension of the portion of the light-blocking structure located between the first light-transmitting opening and the second light-transmitting opening (i.e., the continuous structure mentioned above), which is the minimum dimension of the continuous structure in the X direction.

[0186] R1 is the radius of the intersection circle of the groove 80 and the light-transmitting cover 70 facing the emission module;

[0187] R2 is the radius of the circle intersecting the boundary line corresponding to the mechanical field of view of the transmitter module 531 and the side of the light-transmitting cover 70 facing the transmitter module.

[0188] It is understandable that, since a continuous structure is a three-dimensional structure with a certain length and width, the aforementioned minimum lateral dimension refers to the lateral dimension corresponding to the region with the smallest dimension in the X direction in different regions of the continuous structure.

[0189] The continuous structure satisfies the above constraints, ensuring that the connection structure does not affect the aperture of the first light-transmitting port 93 and the second light-transmitting port 94. At the same time, it can absorb the light propagating from the transmitting module 531 to the receiving module 532 through the light-transmitting cover plate 70, thereby reducing the amount of stray light.

[0190] When the light-shielding structure 90 satisfies the above constraints, the light-shielding structure 90 can improve or eliminate crosstalk stray light (i.e., the first stray light) emitted by the transmitting module and reflected by the light-transmitting cover to reach the receiving module.

[0191] In some embodiments, the groove 80 satisfies the following constraints:

[0192] 1>d² / D≥1 / 3;

[0193] Where D is the thickness of the light-transmitting cover plate 70; d2 is the distance from the apex of the groove 80 of the light-transmitting cover plate 70 to the side of the light-transmitting cover plate 70 facing away from the ranging module 53.

[0194] The groove 80 meets the above conditions, which ensures that the setting of the groove 80 does not adversely affect the structural stability of the light-transmitting cover plate 70, and at the same time, the setting of the groove 80 has a good filtering effect on the first stray light and the second stray light.

[0195] It is understandable that, depending on the usage requirements of the ranging component, the ranging component can satisfy any one or more of the above constraints, or even all of them simultaneously. When the ranging component simultaneously satisfies all of the above constraints, each part of the ranging component satisfies the following conditions:

[0196] The transmitting module 531 meets the following conditions:

[0197] (D-MFOV) / 2-(D-FOV) / 2≥1°;

[0198] The receiving module 532 meets the following conditions:

[0199] MFOV / 2 - FOV / 2 ≥ 1°;

[0200] The ranging component satisfies the following constraints:

[0201] R1≥Z gap1 ×tan(MFOV / 2)+R0;

[0202]

[0203] Continuous structures must satisfy the following constraints:

[0204] 0≤h≤H-(R1+R2);

[0205] Groove 80 satisfies the following constraints:

[0206] 1>d² / D≥1 / 3;

[0207] At this point, the ranging component effectively filters out the first and second stray lights, and can improve the quality of the camera module to a certain extent.

[0208] Another embodiment of this application provides an electronic device. For example... Figure 1 As shown, the electronic device includes a support device 10, a camera module 50 disposed on the support device 10, and a ranging component provided in any of the above embodiments. The camera module 50 includes a front-facing camera module 51. The ranging component and the front-facing camera module 51 are located on the front of the support device 10. The ranging module 53 and the front-facing camera module 51 share the same light-transmitting cover 70.

[0209] In this embodiment, the ranging module 53 and the front camera module 51 can be located in the middle area of ​​the top of the support device 10, or in the left or right area of ​​the top of the support device 10, depending on the usage requirements.

[0210] Another embodiment of this application provides an electronic device. The electronic device includes a support device, a camera module mounted on the support device, and a ranging component provided in any of the above embodiments. The camera module includes a rear-facing camera module. Both the ranging component and the rear-facing camera module are located on the back of the support device, and the ranging module and the front-facing camera module share the same light-transmitting cover.

[0211] Another embodiment of this application provides an electronic device. The electronic device includes a support device, a camera module mounted on the support device, and a ranging component provided in any of the above embodiments. The camera module includes a front-facing camera module and a rear-facing camera module. Two ranging components are provided; one ranging component and the front-facing camera module are both located on the front of the support device, and the ranging module in this component shares the same light-transmitting cover plate with the front-facing camera module; the other ranging component and the rear-facing camera module are both located on the front of the support device, and the ranging module in this component shares the same light-transmitting cover plate with the rear-facing camera module.

[0212] Regardless of the type of electronic device described above, all include the ranging component provided in any of the above embodiments, which can reduce the risk of first and second stray light entering the image sensor to a certain extent, improve the accuracy of ranging, and enhance the quality of the camera module in the electronic device.

[0213] Finally, it should be noted that 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 within the technical scope 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 ranging component, characterized in that, include: The ranging module includes a transmitting module and a receiving module; as well as A light-transmitting cover is located on the first side of the ranging module, which is the light-emitting side of the transmitting module and the light-receiving side of the receiving module. The light-transmitting cover plate has a groove on the side facing the ranging module, and the position of the groove corresponds to the position of the light inlet of the receiving module; The light-transmitting cover has a first portion corresponding to the light outlet of the emitting module; the ranging component further includes a light-shielding structure, which is located between the light-transmitting cover and the ranging module, with at least a portion of the light-shielding structure located between the groove and the first portion, and the light-shielding structure is used to absorb or block light; the light-shielding structure has a first light-shielding part and a second light-shielding part, the first light-shielding part is arranged around the groove and forms a first light-transmitting opening, and the second light-shielding part is arranged around the light outlet of the emitting module and forms a second light-transmitting opening; The surface of the groove is a continuous curved surface, and no light-shielding structure is provided inside the groove. The groove is used to cause stray light propagating through the inside of the light-transmitting cover to be reflected or refracted on the surface of the groove and deviated from the light inlet of the receiving module.

2. The ranging component according to claim 1, characterized in that, The first light-transmitting opening is a cylindrical opening, and the diameter of the first light-transmitting opening is greater than or equal to the diameter of the first target circle. The first target circle is the intersection circle of the boundary line corresponding to the mechanical field of view of the receiving module and the side of the light-transmitting cover plate facing the ranging module.

3. The ranging component according to claim 1, characterized in that, The second light-transmitting opening is a cylindrical opening, and the diameter of the second light-transmitting opening is greater than or equal to the diameter of the second target circle. The second target circle is the intersection circle of the boundary line corresponding to the effective field of view of the transmitting module and the side of the light-transmitting cover plate facing the ranging module.

4. The ranging component according to claim 3, characterized in that, The diameter of the second light-transmitting opening is less than or equal to the diameter of the third target circle, which is the intersection circle of the boundary line corresponding to the mechanical field of view of the transmitting module and the side of the light-transmitting cover plate facing the ranging module.

5. The ranging component according to any one of claims 1 to 4, characterized in that, The first light-shielding portion and the second light-shielding portion overlap or connect between the groove and the first portion to form a continuous structure.

6. The ranging component according to any one of claims 1 to 4, characterized in that, The light-shielding structure includes a screen-printed structure, which is screen-printed on the side of the light-transmitting cover facing the ranging module.

7. The ranging component according to any one of claims 1 to 4, characterized in that, The light-shielding structure includes a flexible structure.

8. The ranging component according to any one of claims 1 to 4, characterized in that, The receiving module includes: A lens, positioned opposite the light-transmitting cover, is used to receive and shape the reflected light reflected back by the target object; A filter, located on the light-emitting side of the lens, allows reflected light matching the wavelength of the probe light to pass through; and An image sensor, located on the light-emitting side of the filter, is used to receive and process reflected light passing through the filter, and convert the optical signal corresponding to the reflected light into an electrical signal; The lens meets the following conditions: Wherein, FOV is the effective field of view of the lens; MFOV is the mechanical field of view of the lens.

9. The ranging component according to claim 8, characterized in that, The light-shielding structure satisfies the following conditions: Wherein, R1 is the radius of the circle where the groove and the light-transmitting cover face towards the ranging module intersect, and it is also the radius of the first light-transmitting opening; R0 is the vertical distance from the vertex of the lens to the planar portion of the light-transmitting cover facing the lens; R0 is the distance between the boundary line of the mechanical field of view of the lens and the tangent of the vertex of the lens.

10. The ranging component according to any one of claims 1 to 4, characterized in that, The transmitting module meets the following conditions: Wherein, D-MFOV is the mechanical field of view of the transmitting module, and D-FOV is the effective field of view of the transmitting module.

11. The ranging component according to claim 10, characterized in that, The transmitting module includes: Light source; and A diffuser is located on the light-emitting side of the light source; The light-shielding structure satisfies the following conditions: ； Where R2 is the radius of the circle intersecting the boundary line corresponding to the mechanical field of view of the transmitting module and the side of the light-transmitting cover facing the transmitting module, and is also the radius of the second light-transmitting opening; R3 is half the lateral dimension of the light source, which is the dimension in the arrangement direction of the transmitting module and the receiving module; airgap is the distance between the light source and the diffuser; d1 is the thickness of the diffuser; n is the refractive index of the diffuser; θ is the divergence angle of the light source; It is the distance between the diffuser and the light-transmitting cover.

12. The ranging component according to claim 11, characterized in that, The light-shielding structure also satisfies the following conditions: 。 13. The ranging component according to claim 11 or 12, characterized in that, The light-shielding structure satisfies the following conditions: ； Wherein, H is the distance between the optical axis of the transmitting module and the optical axis of the receiving module; h is the minimum lateral dimension of the portion of the light-shielding structure located between the first light-transmitting port and the second light-transmitting port; R1 is the radius of the intersection circle of the groove and the side of the light-transmitting cover plate facing the ranging module, which is also the radius of the first light-transmitting port.

14. The ranging component according to claim 13, characterized in that, The groove satisfies the following condition: ； Where D is the thickness of the light-transmitting cover plate, and d2 is the distance from the vertex of the groove to the side of the light-transmitting cover plate facing away from the ranging module.

15. An electronic device, characterized in that, The device includes a support device, a camera module mounted on the support device, and a ranging component as described in any one of claims 1-14, wherein the camera module includes a first camera module, the ranging component and the first camera module are located on the same side of the support device, the ranging module and the first camera module share the same light-transmitting cover, and the first camera module is a front-facing camera module or a rear-facing camera module.

16. An electronic device, characterized in that, The device includes a support device, a camera module mounted on the support device, and a ranging component as described in any one of claims 1-14, wherein the camera module includes a front-facing camera module and a rear-facing camera module, and two ranging components are provided, one of which, along with the front-facing camera module, is located on the front of the support device, and the ranging module in this ranging component shares the same light-transmitting cover plate with the front-facing camera module; the other of which, along with the rear-facing camera module, is located on the front of the support device, and the ranging module in this ranging component shares the same light-transmitting cover plate with the rear-facing camera module.

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