TOF module and electronic device

Abstract

This utility model provides a TOF module and an electronic device. The TOF module includes a transmitting unit, a receiving unit, and a prism. The transmitting unit is used to emit light to a target object, and the receiving unit is used to receive light reflected back from the target object. The prism includes a main body, a transmitting optics, and a receiving optics. The main body is disposed in the optical path of the transmitting unit and the receiving unit. The transmitting optics and the receiving optics are respectively located on adjacent sides of the main body. The transmitting optics is used to emit the light emitted by the transmitting unit. The light emitted by the transmitting unit passes through the main body and is emitted through the transmitting optics. The receiving optics is used to receive the light reflected by the main body and direct it toward the receiving unit. The transmitting optics allows the light reflected back from the target object to pass through, and it is reflected by the main body and directed toward the receiving unit from the receiving optics.

Description

Technical Field

[0001] This utility model relates to the field of TOF technology, and in particular to a TOF module and electronic device. Background Technology

[0002] TOF (Time of Flight) technology continuously sends light pulses to the target, which are reflected upon encountering the target object. The sensor then receives the light returning from the object and calculates the distance to the photographed object by measuring the time difference or phase difference between the emission and reception of the light, thus generating depth information. This is further combined with traditional close-up photography to present the three-dimensional outline of the object in an image format where different colors represent different distances.

[0003] Currently, TOF cameras in the mobile phone industry mainly consist of a transmitter module and a receiver module. The transmitter module emits light, and the receiver module receives light. The transmitter module requires components such as a DOE or diffuser (as a diffractive lens to expand the measurement range of the TOF module), a collimating lens, a VCSEL (vertical laser emitter), a bracket, a ceramic substrate, and a circuit board. The receiver module requires components such as a lens, a bracket, a circuit board, and a chip. The composition of the diffractive and collimating lenses in the transmitter module increases its height to some extent. Similarly, the receiver module's lens, composed of multiple glass or plastic lenses, and its relatively large size, further increases its height. This results in an increased overall height and larger size of the TOF module, making it unsuitable for miniaturization and hindering miniaturized module design. Utility Model Content

[0004] To overcome the shortcomings of the prior art, the present invention aims to provide a compact TOF module and electronic device.

[0005] This invention provides a TOF module, including a transmitting unit, a receiving unit, and a prism. The transmitting unit emits light to a target object, and the receiving unit receives light reflected from the target object. The prism includes a main body, a transmitting optics, and a receiving optics. The main body is disposed in the optical path of the transmitting unit and the receiving unit. The transmitting optics and the receiving optics are located on adjacent sides of the main body. The transmitting optics emit the light received from the transmitting unit. The light emitted by the transmitting unit passes through the main body and is emitted through the transmitting optics. The receiving optics receive the light reflected from the main body and direct it toward the receiving unit. The transmitting optics allows light reflected from the target object to pass through, and the light is reflected by the main body and directed toward the receiving unit from the receiving optics.

[0006] In one embodiment of the present invention, the side of the main body includes a first surface, a second surface and a third surface connected in sequence. The first surface and the second surface are perpendicular to each other. The first surface is located on the side of the third surface away from the transmitting unit. The second surface is disposed close to the receiving unit. A first receiving groove is formed on the first surface and a second receiving groove is formed on the second surface. The transmitting optical device is placed in the first receiving groove and the receiving optical device is placed in the second receiving groove.

[0007] In one embodiment of this utility model, the third surface intersects the first surface at a first angle, and the third surface intersects the second surface at a second angle. The angle range of the first angle is 30° to 60°, and the angle range of the second angle is 30° to 60°.

[0008] In one embodiment of the present invention, the TOF module further includes a one-way transparent film, which is disposed on and attached to the third surface. One side of the one-way transparent film faces the emitting unit and allows light emitted by the emitting unit to pass through. The other side of the one-way transparent film can reflect the light emitted from the emitting unit to the receiving optical device and then direct it toward the receiving unit.

[0009] In one embodiment of the present invention, the emitting optical device is a diffraction device, which includes a substrate layer and a microstructure layer. The microstructure layer includes a nanostructure, and the nanostructure includes a hole formed in the substrate layer.

[0010] In one embodiment of the present invention, the receiving optical device includes a first optical film, a second optical film, and a third optical film stacked sequentially. The first optical film is located on the side of the second optical film close to the receiving unit. The first optical film is used to increase the transmittance of light. The second optical film is used to uniformly project the received light onto the receiving unit. The third optical film is used to filter out light sources of excess wavelengths and increase the transmittance of light sources of the desired wavelength.

[0011] In one embodiment of this utility model, the TOF module further includes a circuit board, which includes a first board segment, a first connecting board segment, and a second board segment. The receiving unit is mounted on the first board segment, and the transmitting unit is mounted on the second board segment. The first board segment and the second board segment are connected perpendicularly to each other through the first connecting board segment. The first board segment is parallel to the second surface, and the second board segment is parallel to the first surface.

[0012] In one embodiment of the present invention, the TOF module further includes a support frame, which is fixedly connected to the second plate segment. The support frame has a receiving cavity, and the prism is placed in the receiving cavity and is relatively fixedly connected to the support frame.

[0013] In one embodiment of this utility model, the support frame includes a first end plate and a second end plate that are adjacent and perpendicular to each other. The first end plate has a first clearance groove, and the second end plate has a second clearance groove. Both the first clearance groove and the second clearance groove are connected to the receiving cavity. The first end plate and the second end plate abut against the first plate segment and the second plate segment, respectively. The transmitting unit is placed in the first clearance groove, and the receiving unit is placed in the second clearance groove. The support frame also has a clearance hole that is connected to the receiving cavity and is used to allow light passing through the transmitting optical device to be directed to the target object.

[0014] This invention also provides an electronic device, including the TOF module as described above.

[0015] In the TOF module and electronic device of this invention, the transmission and reception functions are achieved by setting a prism, which reduces the number of optical elements in the TOF module, making the overall design more compact and reducing the size and weight of the TOF module, thus meeting the trend of miniaturization. At the same time, the prism can change the direction of light propagation, allowing the light to propagate along a specific path, thereby improving the utilization rate of light. In the TOF module, the prism can ensure that the emitted light accurately illuminates the target object and receive the reflected light, thereby improving the accuracy of ranging. Attached Figure Description

[0016] Figure 1This is a schematic diagram of the structure of a TOF module according to an embodiment of the present invention.

[0017] Figure 2 This is an exploded structural diagram of a TOF module according to an embodiment of the present invention.

[0018] Figure 3 This is a cross-sectional view of a TOF module according to an embodiment of the present invention.

[0019] Figure 4 This is a schematic diagram of the structure of the prism in a TOF module according to an embodiment of the present invention.

[0020] Figure 5 This is a schematic diagram showing the connection between the main body and the emitting optical device of a TOF module according to an embodiment of the present invention.

[0021] Figure 6 This is a schematic diagram of the structure of the transmitting optical device of a TOF module according to an embodiment of the present invention.

[0022] Figure 7 for Figure 6 Sectional view at point AA.

[0023] Figure 8 This is a schematic diagram of the unfolded circuit board of a TOF module according to an embodiment of the present invention. Detailed Implementation

[0024] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0025] This utility model provides a TOF module, such as Figures 1-5 As shown, a TOF module of one embodiment includes a transmitting unit 10, a receiving unit 20, and a prism 30. The transmitting unit 10 is used to emit light to a target object, and the receiving unit 20 is used to receive the light reflected back from the target object. The prism 30 includes a main body 31, a transmitting optics 32, and a receiving optics 33. The main body 31 is disposed in the optical path of the transmitting unit 10 and the receiving unit 20, and the transmitting optics 32 and the receiving optics 33 are respectively located on adjacent sides of the main body 31. The main body 31 is a transparent substrate (such as crystal, glass, etc.) that allows light to pass through. The transmitting optics 32 is used to emit the light received from the transmitting unit 10. The light emitted by the transmitting unit 10 passes through the main body 31 and is emitted through the transmitting optics 32. The receiving optics 33 is used to receive the light reflected by the main body 31 and direct it to the receiving unit 20. The transmitting optics 32 allows the light reflected back from the target object to pass through, and it is reflected by the main body 31 and directed from the receiving optics 33 to the receiving unit 20. Figure 3In the structure shown, the dashed lines with arrows represent the paths of light rays.

[0026] It can be understood that a TOF module includes a transmitter module and a receiver module. The transmitter module is used to emit light, and the receiver module is used to receive light. The transmitter module includes a transmitter unit 10, a main body 31, and a transmitting optics 32. The receiver module includes a receiver unit 20, a receiving optics 33, and a main body 31.

[0027] In the TOF module of this invention, the prism 30 is used to realize both transmission and reception functions, which reduces the number of optical elements in the TOF module, making the overall design more compact and reducing the size and weight of the TOF module, thus meeting the trend of miniaturization. At the same time, in the TOF module, the prism 30 can ensure that the emitted light accurately illuminates the target object and receive the reflected light, thereby improving the accuracy of ranging.

[0028] In this embodiment, as Figures 4-5 As shown, the cross-section of the prism 30 is generally triangular. The side of the main body 31 includes a first surface 311, a second surface 312, and a third surface 315 connected in sequence. The first surface 311 is perpendicular to the second surface 312. The first surface 311 is located on the side of the third surface 315 away from the transmitting unit 10, and the second surface 312 is located close to the receiving unit 20. A first receiving groove 313 is formed at the first surface 311 of the main body 31, and a second receiving groove 314 is formed at the second surface 312 of the main body 31. The transmitting optical device 32 is placed in the first receiving groove 313, and the receiving optical device 33 is placed in the second receiving groove 314.

[0029] Specifically, the transmitting unit 10 emits light, which passes through the main body 31 and is directed towards the target object via the transmitting optics 32. The transmitting optics 32 functions as a diffraction lens and collimating lens in existing TOF modules, reducing the number of optical elements in the TOF module and thus decreasing the module's height, resulting in a more compact overall design and reduced module size and weight. The prism 30 precisely controls the direction of light propagation. Since both the transmitting optics 32 and the receiving optics 33 are mounted on the main body 31, and both transmission and reception are performed through a single prism 30, the path heights of the transmitted and received light rays are ensured to be identical, thereby improving ranging accuracy.

[0030] In this embodiment, the third surface 315 intersects the first surface 311 at a first included angle, and the third surface 315 intersects the second surface 312 at a second included angle. The angle range of the first included angle is 30° to 60°, and the angle range of the second included angle is also 30° to 60°. Preferably, the first included angle is 45°, the second included angle is 45°, and the cross-section of the prism 30 is an isosceles right triangle. The prism 30 with an isosceles right triangle cross-section can effectively disperse light, effectively change the direction of light propagation, or reflect light in a specific direction. This type of prism has a fixed geometry, making the refraction angle easy to calculate and predict. For example, when light enters the prism from one surface, it will be refracted at a 90-degree angle, making it easy to calculate the paths of the incident and outgoing rays.

[0031] Those skilled in the art can set the angle of the first included angle to be 30°, 35°, 37°, 40°, 42°, 44°, 46°, 48°, 50°, 55°, 58°, 60°, etc., according to the actual situation, and correspondingly the angle of the second included angle to be 60°, 55°, 53°, 50°, 48°, 46°, 42°, 40°, 35°, 32°, 30°, etc., without making a unique limitation here.

[0032] In this embodiment, the TOF module also includes a one-way transparent film 40. The one-way transparent film 40 is disposed on and attached to the third surface 315. One side of the one-way transparent film 40 faces the emitting unit 10 and allows light emitted by the emitting unit 10 to pass through. The other side of the one-way transparent film 40 can reflect light reflected from the target object to the receiving optics 33 and then to the receiving unit 20. Specifically, the one-way transparent film 40 mainly allows light emitted by the emitting unit 10 to pass through (the side of the one-way transparent film 40 near the emitting unit 10 allows light to pass through), and then the light passes through the main body 31 and is emitted from the emitting optics 32 onto the target object. The emitted light is reflected back by the target object, passes through the emitting optics 32, and penetrates the main body 31 along the reflected path, and is directed to the side of the one-way vision film 40 away from the emitting unit 10 (the side of the one-way vision film 40 away from the emitting unit 10 blocks the light from passing through and can reflect the light). At this time, the one-way vision film 40 reflects the light to change the direction of the light, so that the light path is directed towards the receiving optics 33, and the light passes through the receiving optics 33 and is directed to the receiving unit 20.

[0033] In this embodiment, as Figures 6-7 As shown, the emitting optical device 32 is a diffraction device, which includes a substrate layer 321 and a microstructure layer 322. The microstructure layer 322 includes nanostructures, which include pores formed in the substrate layer 321.

[0034] Specifically, in this embodiment, the substrate layer 321 has a receiving cavity and multiple transmission holes. Each transmission hole extends along the thickness direction of the substrate layer 321 and reaches both sides of the substrate layer 321. The transmission holes and the receiving cavity are connected. A microstructure layer 322 is placed within the receiving cavity. The microstructure layer 322 utilizes nanomaterials to significantly enhance the diffraction, scattering, or absorption characteristics of light. For example, the surface plasmon resonance (SPR) effect can be achieved using nanoscale metal particles, which enable these particles to exhibit strong scattering or absorption characteristics under specific wavelengths of light. By precisely designing and manufacturing nanomaterials, the propagation direction, speed, and mode of light can be controlled. This capability allows diffraction devices to achieve complex optical functions at a smaller scale, such as super-resolution imaging, beam shaping, and optical filtering. The high precision characteristics of nanomaterials enable diffraction devices to achieve higher spatial resolution than traditional optical elements.

[0035] In another preferred embodiment, the transmission aperture may include a first transmission aperture and a second transmission aperture. The diameter of the first transmission aperture is larger than that of the second transmission aperture. There are multiple first and second transmission apertures, and each first transmission aperture is coaxially arranged with one second transmission aperture. The first transmission aperture has a length extending along the thickness direction of the substrate layer 321 and extends to one side of the substrate layer 321. The second transmission aperture has a length extending along the thickness direction of the substrate layer 321 and extends to the other side of the substrate layer 321. Both the first and second transmission apertures are connected to the accommodating cavity. The opening of the second transmission aperture faces the emitting unit 10. The light emitted by the emitting unit 10 passes through the main body 31, through the second transmission aperture, and exits through the first transmission aperture. Entering through the smaller diameter second transmission aperture and exiting through the larger diameter first transmission aperture is beneficial for enhancing the diffraction effect, reducing the sharpness of the light spot edge, and improving the imaging quality. Enhancing Diffraction: When light passes through a very small aperture, it undergoes significant diffraction. Diffraction refers to the bending of light waves as they bypass obstacles or pass through slits. When light enters through a small aperture, the light wave is greatly bent, and this effect is most pronounced when the size of the aperture is comparable to the wavelength of the light. Reducing the Sharpness of the Light Spot Edge: After entering through a small aperture, light exits through a larger aperture, resulting in a more uniform beam. The diffusion effect of the larger aperture softens the edges of the light spot, creating a smoother spot. This is useful in some optical applications, such as lighting design where uniform illumination is required. Improving Image Quality: In imaging systems, diffraction affects image quality. By adjusting the aperture, the degree of diffraction can be controlled, thereby improving the resolution and sharpness of the imaging system.

[0036] In this embodiment, the receiving optical device 33 includes a first optical film 331, a second optical film 332, and a third optical film 333 stacked sequentially. The first optical film 331 is located on the side of the second optical film 332 away from the receiving unit 20. The first optical film 331 is used to increase the transmittance of light. The second optical film 332 is used to uniformly project the received light onto the receiving unit 20. The third optical film 333 is used to filter out light sources of excess wavelengths and increase the transmittance of light sources of the desired wavelength.

[0037] Specifically, the first optical film 331 can be an antireflective coating, also known as an anti-reflective film or a non-reflective film. Its main function is to reduce or eliminate reflected light from the surface of optical lenses such as lenses, prisms, and plano mirrors, thereby increasing the intensity of transmitted light and making the optical system image clearer. The second optical film 332 is an optical film containing nanomaterials, whose main function is to ensure that the received light source is uniformly transmitted to every corner of the receiving unit 20. The third optical film can be a narrowband coating, whose main function is to reduce light reflection, increase light transmittance, filter out light sources of excess wavelengths, and increase the transmittance of light sources of the required wavelengths (coatings for various light and wavelength bands such as infrared cut-off sheets and infrared light).

[0038] In this embodiment, the TOF module also includes a circuit board 50, which includes a first board segment 51, a first connecting board segment 52, and a second board segment 53. The receiving unit 20 is mounted on the first board segment 51, and the transmitting unit 10 is mounted on the second board segment 53. The first board segment 51 and the second board segment 53 are connected perpendicularly to each other through the first connecting board segment 52. The first board segment 51 is parallel to the second surface 312, and the second board segment 53 is parallel to the first surface 311.

[0039] Specifically, both the first segment 51 and the second segment 53 are rigid-flex circuit boards. The main functions of rigid-flex circuit boards are to improve the overall performance of the circuit board, reduce its size and weight, enrich design space, increase integration, and meet the stability and reliability requirements in complex environments. A rigid-flex circuit board is formed by combining flexible and rigid circuit boards through processes such as lamination, creating a circuit board with both FPC (Flexible Printed Circuit Board) and PCB (Printed Circuit Board) characteristics. This technology not only improves the overall performance of the circuit board but also greatly enriches the design space of electronic products. By increasing the integration of the circuit board, it reduces its size and weight, making electronic devices lighter and more efficient. Both the first segment 51 and the second segment 53 have steel sheets attached to their bottoms, primarily to improve their strength and stability and prevent deformation or damage.

[0040] Specifically, the first connecting section 52 is a flexible circuit board, a type of circuit board with high flexibility. Unlike traditional rigid circuit boards, flexible circuit boards can maintain the stability of electrical connections when bent, folded, or even rolled up. The first connecting section 52 can be bent to form a 90° angle between the first section 51 and the second section 53. During the assembly of the TOF device, the circuit board 50 can be... Figure 8 The device is laid out horizontally, with the receiving unit 20 and the transmitting unit 10 mounted on the first board segment 51 and the second board segment 53, respectively, and electrically connected in, for example, conventional manner.

[0041] In this embodiment, the circuit board 50 further includes a second connecting section 54 and a third section 55. The second connecting section 54 is a flexible circuit board, and the third section 55 is the same as the first section 51 and the second section 53, both being rigid-flex circuit boards with a steel sheet attached to the bottom. A connector 70 is mounted on the third section 55, and the connector 70 is electrically connected to an external circuit. The first section 51 and the second section 53 are electrically connected through the first connecting section 52, and the second section 53 and the third section 55 are electrically connected through the second connecting section 54.

[0042] It should be noted that the first board segment 51 is also connected to components such as storage chips and capacitors, and the second board segment 53 is also connected to components such as resistors and capacitors.

[0043] In this embodiment, the TOF module further includes a support frame 60, which is fixedly connected to the second plate segment 53. The support frame 60 has a receiving cavity, and the prism 30 is placed in the receiving cavity and fixedly connected to the support frame 60. Specifically, the support frame 60 has an adjacent and mutually perpendicular first end plate 61 and a second end plate 62, which abut against the first plate segment 51 and the second plate segment 53, respectively. In other embodiments, to further compact the structure and reduce the overall size, clearance structures, such as clearance grooves (not shown in the figure), corresponding to the transmitting unit 10 and the receiving unit 20, can be formed in the first end plate 61 and the second end plate 62, respectively. During assembly, the transmitting unit 10 and the receiving unit 20 are respectively fitted into the corresponding clearance structures. The support frame 60 also has clearance holes 63, which are connected to the receiving cavity and are used to allow light passing from the transmitting optical device 32 to be directed to the target object.

[0044] In this embodiment, the transmitting unit 10 includes a vertical laser emitter 11, a diffuser 12, a base 13, and a driver chip 14. The base 13 is connected to the second plate segment 53, and the vertical laser emitter 11 is connected to the base 13. The vertical laser emitter 11 is electrically connected to the second plate segment 53 through the base 13 and is used to emit a laser beam. The diffuser 12 is mounted on the base 13 and is located in the optical path of the laser beam emitted by the vertical laser emitter 11. Its main function is to change the propagation direction and intensity distribution of the beam, causing the beam to diffuse during propagation. The receiving unit 20 may include, for example, an existing image sensor chip, and is electrically connected to the first plate segment 51. The driver chip 14 is disposed on the upper surface of the second plate segment 53 and is electrically connected to the second plate segment 53. The base 13 is electrically connected to the driver chip 14 through the second plate segment 53.

[0045] The beneficial effects of the TOF module in this embodiment are as follows:

[0046] 1) Improved light utilization: Prisms can change the direction of light propagation, allowing light to travel along a specific path, thereby improving light utilization. In a TOF module, prisms ensure that the emitted light accurately illuminates the target object and receive the reflected light, thus improving ranging accuracy.

[0047] 2) Optimizing beam quality: Prisms can break down light into different wavelengths or directions through beam splitting or dispersion. In a TOF module, prisms can optimize the quality of the emitted beam, making it more uniform and stable, thereby improving the stability and reliability of ranging.

[0048] 3) Reducing measurement errors: Since prisms can change the direction of light propagation, measurement errors can be reduced by adjusting the angle and position of the prisms. In TOF modules, prisms ensure that the paths of emitted and received light rays are consistent, thereby reducing measurement errors caused by light deflection or scattering.

[0049] 4) Expanding the measurement range: By adjusting the angle and position of the prism, the propagation path and range of light can be changed. In a TOF module, the prism can expand the measurement range, enabling the module to measure targets at greater distances.

[0050] 5) Simplified optical path: Prisms can change the direction of light propagation, making the transmission and reception paths more compact, which is beneficial for the miniaturization design of modules.

[0051] 6) Improved accuracy: Prisms can precisely control the direction of light propagation. Since both transmission and reception are carried out through the same prism, it can ensure that the paths of the transmitted and received light rays are highly consistent, thereby improving the ranging accuracy.

[0052] 7) Compact design: Using the same prism for both transmission and reception reduces the number of optical components in the module, making the overall design more compact and reducing the size and weight of the module.

[0053] 8) Reduce interference: The guidance of the prism can reduce interference from ambient light or other light sources and improve the signal-to-noise ratio.

[0054] 9) Enhanced stability: The use of prisms can ensure the stability of the optical path and reduce performance fluctuations caused by vibration or temperature changes.

[0055] 10) Reduced costs: The simplified optical design reduces manufacturing costs while also reducing the complexity of calibration and maintenance.

[0056] The specific assembly process of the TOF module in this embodiment is as follows:

[0057] 1) The transmitting unit 10 is installed on the first board segment 51 and electrically connected by the connecting line; the receiving unit 20 is installed on the second board segment 53 and electrically connected by the connecting line; and the connector 70 is installed on the third board segment 55.

[0058] 2) The prism 30 and the support frame 60 are installed and connected to form an optical module, and then the optical module is installed on the second plate segment 53, located above the transmitting unit 10;

[0059] 3) Bend the first connecting plate segment 52 so that the first plate segment 51 and the second plate segment 53 form a 90° angle. The first plate segment 51 is rotated through the first connecting plate segment 52 to abut against the side of the support frame 60. The support frame 60 covers the receiving unit 20, and the assembly is completed.

[0060] This invention also includes an electronic device, comprising the TOF module as described above.

[0061] In this document, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art will understand the specific meaning of these terms based on the specific circumstances.

[0062] In this document, the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inner", "outer", "vertical", and "horizontal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the purpose of clarifying the technical solution and for the convenience of description, and therefore should not be construed as limiting the present utility model.

[0063] In this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, which includes not only the elements listed but also other elements not expressly listed.

[0064] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A TOF module, characterized in that, The device includes a transmitting unit (10), a receiving unit (20), and a prism (30). The transmitting unit (10) emits light to a target object, and the receiving unit (20) receives light reflected from the target object. The prism (30) includes a main body (31), a transmitting optics (32), and a receiving optics (33). The main body (31) is located in the optical path of the transmitting unit (10) and the receiving unit (20). The transmitting optics (32) and the receiving optics (33) are located adjacent to the main body (31). On both sides, the emitting optical device (32) is used to emit the light emitted by the emitting unit (10) and the light emitted by the emitting unit (10) passes through the main body (31) and is emitted through the emitting optical device (32). The receiving optical device (33) is used to receive the light reflected by the main body (31) and shoot it toward the receiving unit (20). The emitting optical device (32) allows the light reflected back from the target object to pass through, and is reflected by the main body (31) and shot toward the receiving unit (20) from the receiving optical device (33).

2. The TOF module according to claim 1, characterized in that, The side of the main body (31) includes a first surface (311), a second surface (312) and a third surface (315) connected in sequence. The first surface (311) and the second surface (312) are perpendicular to each other. The first surface (311) is located on the side of the third surface (315) away from the transmitting unit (10). The second surface (312) is located close to the receiving unit (20). A first receiving groove (313) is provided at the first surface (311) and a second receiving groove (314) is provided at the second surface (312). The transmitting optical device (32) is placed in the first receiving groove (313) and the receiving optical device (33) is placed in the second receiving groove (314).

3. The TOF module according to claim 2, characterized in that, The third surface (315) intersects the first surface (311) at a first angle, and the third surface (315) intersects the second surface (312) at a second angle. The angle range of the first angle is 30° to 60°, and the angle range of the second angle is 30° to 60°.

4. The TOF module according to claim 3, characterized in that, The TOF module also includes a one-way transparent film (40), which is disposed on the third surface (315) and attached to the third surface (315). One side of the one-way transparent film (40) faces the transmitting unit (10) and allows light emitted by the transmitting unit (10) to pass through. The other side of the one-way transparent film (40) can reflect light to the receiving optical device (33) and direct it toward the receiving unit (20).

5. The TOF module according to claim 1, characterized in that, The emitting optical device (32) is a diffraction device, which includes a substrate layer (321) and a microstructure layer (322). The microstructure layer (322) includes a nanostructure, which includes a structure with pores formed in the substrate layer (321).

6. The TOF module according to claim 1, characterized in that, The receiving optical device (33) includes a first optical film (331), a second optical film (332), and a third optical film (333) stacked in sequence. The first optical film (331) is located on the side of the second optical film (332) away from the receiving unit (20). The first optical film (331) is used to increase the transmittance of light. The second optical film (332) is used to uniformly project the received light onto the receiving unit (20). The third optical film (333) is used to filter out light sources of excess wavelengths and increase the transmittance of light sources of the required wavelengths.

7. The TOF module according to claim 2, characterized in that, The TOF module also includes a circuit board (50), which includes a first board segment (51), a first connecting board segment (52), and a second board segment (53). The receiving unit (20) is mounted on the first board segment (51), and the transmitting unit (10) is mounted on the second board segment (53). The first board segment (51) and the second board segment (53) are connected perpendicularly to each other through the first connecting board segment (52). The first board segment (51) is parallel to the second surface (312), and the second board segment (53) is parallel to the first surface (311).

8. The TOF module according to claim 7, characterized in that, The TOF module also includes a support frame (60), which is fixedly connected to the second plate segment (53). The support frame (60) has a receiving cavity, and the prism (30) is placed in the receiving cavity and is relatively fixedly connected to the support frame (60).

9. The TOF module according to claim 8, characterized in that, The support frame (60) includes a first end plate (61) and a second end plate (62) that are adjacent and perpendicular to each other. The first end plate (61) and the second end plate (62) abut against the first plate segment (51) and the second plate segment (53) respectively. The support frame (60) is also provided with a clearance hole (63), which is connected to the receiving cavity and is used to allow light passing through the emitting optical device (32) to be directed to the target object.

10. An electronic device, characterized in that, Includes the TOF module as described in any one of claims 1 to 9.

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