Patent Publication Number: US-2021195076-A1

Title: Tof camera module, electronic device, and assembly method

Description:
TECHNICAL FIELD 
     The present invention relates to field of depth information camera modules, and in particular to a TOF camera module, an electronic device and an assembly method. 
     TECHNICAL BACKGROUND 
     TOF camera module, i.e., Time of Flight, refers to the use of a sensor to emit modulated light, and then after the light encountering the object and being reflected, the sensor calculates a time difference or phase difference between the emitted light and the light reflected by the object, so that the depth information about the object is obtained. 
     At present, in field of electronic devices, especially mobile electronic devices, with the advancement of technology and the upgrading of consumer demand, there are more and more requirements for cameras, the consumers not only hope to obtain clear images through the camera, but also hope that the entire electronic device has more functions, for example, the camera was rear-mounted at the beginning to shoot objects, and then a flashlight was added to satisfy the consumers to use the camera in low light conditions, later a front camera is added to allow the consumers to directly capture their own images during the use of the electronic device. 
     Mobile electronic devices have developed much nowadays, from the beginning, they have been equipped with one camera and gradually upgraded to two cameras or even three cameras, in the future, they may be equipped with camera modules for acquiring depth information, the functions of the entire electronic device are becoming more and more powerful, its structure and design are becoming more and more complex. 
     Obviously, the space available for carrying functional modules in the entire electronic device is limited, the TOF camera module itself occupies more space than a single camera, because in a single TOF camera module, it includes a Floodlight and a receiving module, wherein the floodlight is used for emitting light, the receiving module is used for receiving light, the size of the receiving module is similar to the size of a normal camera, the floodlight further occupies at least part of the installation space of the electronic device. 
     How to save more installation space for the electronic device equipped with the TOF camera module when carrying other functional modules in the future, or how to make the electronic device carry more functional modules, is a matter of concern problem. 
     BRIEF SUMMARY OF THE INVENTION 
     An object of the present invention is to provide a TOF camera module, an electronic device, and an assembly method, wherein the TOF camera module has a smaller area size to reduce the space occupied during installation. 
     Another object of the present invention is to provide a TOF camera module, an electronic device and an assembly method, wherein a first circuit board of the TOF camera module has a smaller area size. 
     Another object of the present invention is to provide a TOF camera module, an electronic device and an assembly method, wherein the TOF camera module includes a floodlight module and a receiving module, and a second circuit board of the floodlight modules has a smaller area size. 
     Another object of the present invention is to provide a TOF camera module, an electronic device and an assembly method, wherein the first circuit board of the receiving module has a smaller area size. 
     Another object of the present invention is to provide a TOF camera module, an electronic device and an assembly method, wherein at least one electronic component of the TOF camera module is arranged on a back side of the first circuit board to reduce the area size of the TOF camera module. 
     Another object of the present invention is to provide a TOF camera module, an electronic device and an assembly method, wherein at least one electronic component of the floodlight is arranged on a back side of the circuit board of the receiving module to reduce the area size of the TOF camera module. 
     Another object of the present invention is to provide a TOF camera module, an electronic device, and an assembly method, wherein at least one electronic component of the receiving module is arranged on the back side of the circuit board of the receiving module to reduce the area size of the TOF camera module. 
     Another object of the present invention is to provide a TOF camera module, an electronic device and an assembly method, wherein the TOF camera module can be installed with more electronic components while maintaining a certain area size. 
     Another object of the present invention is to provide a TOF camera module, an electronic device and an assembly method, wherein the TOF camera module can be smaller in size while maintaining a certain number of the electronic components. 
     Another object of the present invention is to provide a TOF camera module, an electronic device and an assembly method, wherein a photosensitive element of the receiving module can be designed to be larger while maintaining a certain area size of the TOF camera module size. According to one aspect of the present invention, the present invention provides a TOF camera module, wherein the TOF camera module includes: 
     a floodlight module; 
     a receiving module; and 
     a plurality of electronic components, wherein the receiving module includes a first lens assembly, a first photosensitive element, and a first circuit board, and the first lens assembly provides an optical path for light to pass through and reach the photosensitive element to perform photoelectric conversion, the first photosensitive element is conductively connected to the first circuit board, and the floodlight module is conductively connected to the receiving module, and the first circuit board has a front side and a back side, and the first photosensitive element is located on the front side of the first circuit board, and at least a part of the plurality of electronic components is located on the back side of the first circuit board. 
     According to an embodiment of the present invention, the at least part of the electronic components located on the back side of the first circuit board is conductively connected to a main body of the receiving module. 
     According to an embodiment of the present invention, the at least part of the electronic components on the back side of the first circuit board is conductively connected to the floodlight module. 
     According to an embodiment of the present invention, the at least part of the electronic components located on the back side of the first circuit board are conductively connected to the main body of the receiving module, and the at least part of the electronic components located on the back side of the first circuit board are conductively connected to the floodlight module. 
     According to an embodiment of the present invention, the floodlight module includes a light emitting element, a bracket, and a second circuit board, wherein the light emitting element is conductively connected to the second circuit board, the bracket is supported on the second circuit board and surrounds the light-emitting element, and the floodlight module is supported on the first circuit board of the receiving module. The second circuit board of the floodlight module is directly and conductively connected to the first circuit board of the receiving module. 
     According to an embodiment of the present invention, further including a flexible connector, wherein the first circuit board of the floodlight module is conductively connected to the first circuit board of the receiving module through the flexible connector. 
     According to an embodiment of the present invention, the bracket of the floodlight module is integrally formed on the second circuit board through a ceramic sintering process. 
     According to an embodiment of the present invention, at least a part of the second circuit board of the floodlight module is located above the first circuit board. 
     According to an embodiment of the present invention, it further includes a support base, wherein the floodlight module includes a light emitting element, a bracket and a second circuit board, and the light emitting element is conductively connected to the second circuit board, the bracket is supported on the second circuit board and surrounds the light emitting element, and the support base is located between the second circuit board and the first circuit board, and the floodlight module is supported on the first circuit board through the support base. 
     According to an embodiment of the present invention, it further includes a conductive member, wherein the conductive member is located on the support base, and the conductive member conducts the first circuit board with the second circuit board. 
     According to an embodiment of the present invention, the support base has an upper surface, wherein the second circuit board is supported on the upper surface, and the support base has a groove, wherein the groove is formed on the upper surface, the conductive member has a first conductive end and a second conductive end, wherein the second conductive end is conductively connected to the second circuit board and is accommodated in the groove, and the first conductive end is conductively connected to the first circuit board. 
     According to an embodiment of the present invention, the conductive member is wrapped in the support base. 
     According to an embodiment of the present invention, further including a flexible connector, wherein the first circuit board is conductively connected to the second circuit board through the flexible connector, and the at least part of the electronic components located on the back side of the first circuit board are conductively connected to the second circuit board through the flexible connector. 
     According to an embodiment of the present invention, the support base is integrally formed on the second circuit board of the floodlight module through a ceramic sintering process. 
     According to an embodiment of the present invention, the support base, the bracket and the second circuit board are integrally formed by a ceramic sintering process. 
     According to an embodiment of the present invention, further including a protective member, wherein the protective member is located on the back side of the first circuit board, the protective member forms a protective cavity, and the electronic components located on the back side of the first circuit board are accommodated in the protective cavity. 
     According to an embodiment of the present invention, the protective member is a surrounding wall. 
     According to an embodiment of the present invention, it further includes a protective layer, wherein the protective layer is located in the protective cavity and covers the electronic components. 
     According to an embodiment of the present invention, the protective member includes a surrounding wall and a bottom wall, wherein the bottom wall covers an opening of the protective cavity. 
     According to an embodiment of the present invention, the protective member is integrally formed on the first circuit board through a molding process. 
     According to an embodiment of the present invention, a height of the protective member ranges from 0.35 mm to 0.5 mm. 
     According to an embodiment of the present invention, a height of the floodlight module is not greater than 4.5 mm. 
     According to an embodiment of the present invention, an area size range of the TOF camera module is not greater than 10.5 mm*6.6 mm. 
     According to an embodiment of the present invention, an area size of the TOF camera module is not greater than 12 mm*7 mm. 
     According to an embodiment of the present invention, the floodlight module and the receiving module have a height difference, and a range of the height difference does not exceed 0.15 mm. 
     According to another aspect of the invention, there is provided an electronic device including: 
     an electronic device main body; and 
     a TOF camera module described above, wherein the TOF camera module is provided in the electronic device body. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1A  is a perspective view of a TOF camera module according to a preferred embodiment of the present invention. 
         FIG. 1B  is a cross-sectional view of a TOF camera module according to a preferred embodiment of the present invention. 
         FIG. 2  is a schematic diagram of an electronic device according to a preferred embodiment of the present invention. 
         FIG. 3  is a schematic diagram of a TOF camera module according to a preferred embodiment of the present invention. 
         FIG. 4A  is a schematic diagram of a TOF camera module according to a preferred embodiment of the present invention. 
         FIG. 4B  is a schematic diagram of a TOF camera module according to a preferred embodiment of the present invention. 
         FIG. 5A  is a schematic diagram of a TOF camera module according to a preferred embodiment of the present invention. 
         FIG. 5B  is a schematic diagram of a TOF camera module according to a preferred embodiment of the present invention. 
         FIG. 6A  is a schematic diagram of a TOF camera module according to a preferred embodiment of the present invention. 
         FIG. 6B  is a schematic diagram of a TOF camera module according to a preferred embodiment of the present invention. 
         FIG. 7A  is a schematic diagram of a floodlight module according to a preferred embodiment of the present invention. 
         FIG. 7B  is a schematic diagram of a floodlight module according to a preferred embodiment of the present invention. 
     
    
    
     DETAILED DESCRIPTION OF EMBODIMENTS 
     The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments in the following description are only examples, and those skilled in the art can think of other obvious variations. The basic principles of the present invention defined in the following description can be applied to other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention. 
     Those skilled in the art should understand that, in the disclosure of the present invention, the terms “longitudinal”, “lateral”, “upper”, “lower”, “front”, “rear”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inner”, “outer”, etc. are based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and to simplify the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so the above terms should not be understood as limiting the present invention. 
     It can be understood that the term “a” should be understood as “at least one” or “one or more”, that is, in one embodiment, the number of an element may be one, while in other embodiments, the number can be multiple, and the term “a” cannot be understood as a restriction on the number. 
       FIGS. 1A and 1B  show a TOF camera module  1  according to a preferred embodiment of the present invention, and  FIG. 2  shows an electronic device  1000  with the TOF camera module  1 . 
     The electronic device  1000  includes an electronic device main body  2  and the TOF camera module  1 , wherein the TOF camera module  1  is provided on the electronic device main body  2 . The electronic device  1000  may also include at least one camera module, such as a tele-photo camera module, a medium-focus camera module, and a wide-angle camera module. 
     The TOF camera module  1  has a smaller area size, so the electronic device main body  2  reserves more installation space for installing the camera module or other units. 
     Specifically, the TOF camera module  1  includes a floodlight assembly  100  and a receiving module assembly  200 , wherein the floodlight assembly  100  is conductively connected to the receiving module assembly  200 , the floodlight assembly  100  is used to emit light, and the light is reflected by at least one object, and the receiving module assembly  200  receives the reflected light, so as to obtain the depth information of the object based on a time difference or a phase difference between the emitted light and the reflected light. 
     The TOF camera module  1  includes a floodlight module  10 , a receiving module  20 , and at least one electronic component  30 , wherein at least one of the electronic components  30  is conductively connected to the floodlight module  10 , at least one of the electronic components  30  is conductively connected to the receiving module  20 , the electronic components  30  being conductive can be understood to mean that at least part of the electronic components  30  are used to support the corresponding floodlight assembly  100  or/and the receiving module assembly  200  to work. 
     Further, the floodlight assembly  100  includes the floodlight module  10  and at least one electronic component  30 , wherein the electronic component  30  is conductively connected to the floodlight module  10 . The receiving module assembly  200  includes the receiving module  20  and at least one electronic component  30 , wherein the electronic component  30  is conductively connected to the receiving module  20 . 
     The receiving module  20  includes a first lens assembly  21 , a first photosensitive element  22 , and a first circuit board  23 , wherein the first lens assembly  21  provides an optical path for light to pass through and reach the first photosensitive element  22  to perform photoelectric conversion, and the first photosensitive element  22  is conductively connected to the first circuit board  23 . 
     The first lens assembly  21  includes a first lens  211  and a base  212 , wherein the base  212  surrounds to form a light window, and the first lens  211  is supported on the base  212  and held in a photosensitive path of the first photosensitive element  22 , thus, the light passes through the first lens  211  and then reaches the first photosensitive element  22  through the light window. 
     The floodlight module  10  includes a projection assembly  11  and a second circuit board  12 , wherein the projection assembly  11  is conductively connected to the second circuit board  12 , and the second circuit board  12  is conductively connected to the first circuit board  23  of the receiving module  20 . The second circuit board  12  may be a ceramic substrate, a rigid-flex board, a circuit board, or the like. In the present invention, at least a part of the second circuit board  12  of the floodlight module  10  is located above the first circuit board  23 , that is, when the second circuit board  12  is orthographically projected along a height direction to the first circuit board  23 , at least a part of it is located in the range of the first circuit board  23 , that is, when the second circuit board  12  is projected relative to the first circuit board  23 , at least part of it is located in the first circuit board  23 . 
     The projection assembly  11  further includes a light emitting element  111  and a bracket  112 , wherein the light emitting element  111  is conductively supported on the second circuit board  12 , and the bracket  112  is supported on the second circuit board  12  and the bracket  112  forms an accommodating cavity, and the light-emitting element  111  is accommodated in the accommodating cavity. 
     The projection assembly  11  may further include an optical auxiliary element  113 , wherein the optical auxiliary element  113  is supported by the bracket  112  and held in a light-emitting path of the light-emitting element  111 , and after the light-emitting element  111  emits light, the light passes through the optical auxiliary element  113  and then radiates outward. The optical auxiliary element  113  may be an optical diffractive element, and the optical auxiliary element  113  is used to assist the light-emitting element  111  to radiate light outward, and the type of the optical auxiliary element  113  is not a limitation to the present invention. 
     Further, the bracket  112  is integrally formed on the second circuit board  12 , such as integrally formed by ceramic sintering, or integrally formed by molding. The bracket  112  may also be installed on the second circuit board  12  by means of assembling. And preferably, the bracket  112  and the second circuit board  12  are integrally formed by ceramic sintering. 
     Referring to  FIG. 7A , the second circuit board  12  includes a conductive portion  121  and an insulating portion  122 , wherein the insulating portion  122  is connected to the conductive portion  121 , and the insulating portion  122  with the bracket  112  may be integrally formed on the conductive portion  121 , for example, it is integrally formed by molding. 
     It can be understood that the bracket  112  of the floodlight module  10  and the insulating portion  122  of the second circuit board  12  may be made of same or different materials. The heat dissipation performance of the material of the second circuit board  12  of the floodlight module  10  may be better than or close to that of the material of the bracket  112 . The second circuit board  12  and the bracket  112  may be integrally formed, or the bracket  112  may be attached to the second circuit board  12 , how the two are formed is not a limitation to the present invention. 
     Further, for the entire TOF camera module  1 , a height of the floodlight module  10  is generally lower than a height of the receiving module  20 , and for the floodlight module  10 , its height can be adjusted by a height of the bracket  112 , the higher the height of the bracket  112  is, the higher is the height of the floodlight module  10 , and the lower the height of the bracket  112  is, the lower is the height of the floodlight module  10 . 
     In some embodiments of the present invention, the height of the floodlight module  10  is within 4.5 mm. In some examples of the present invention, the height of the floodlight module  10  is between 4 mm and 4.5 mm. 
     In this example, the second circuit board  12  of the floodlight module  10  is directly and conductively connected to the first circuit board  23  of the receiving module  20 . The second circuit board  12  has a front side and a back side, wherein the front side of the second circuit board  12  is used to support the light emitting element  111 , and the light emitting element  111  is conductively connected to the second circuit board  12 , the back side of the second circuit board  12  is used to contact the first circuit board  23 , and the second circuit board  12  is conductively connected to the first circuit board  23 . 
     The first circuit board  23  has a front side and a back side, wherein the front side of the first circuit board  23  is conductively connected to the first photosensitive element  22 , and the front side of the first circuit board  23  and the back side of the second circuit board  12  are opposed to each other. 
     The second circuit board  12  is provided with at least one first conductive end  1210  and at least one second conductive end  1220 , wherein the first conductive end  1210  is located on the front side of the second circuit board  12 , and the second conductive end  1220  is located on the back side of the second circuit board  12 , the first conductive end  1210  and the second conductive end  1220  can be conducted to each other, and the first conductive end  1210  contacts conductively directly with the light-emitting element  111 . 
     When the floodlight module  10  is installed on the first circuit board  23  of the receiving module  20 , the second conductive end  1220  can be conducted to the first circuit board  23 . It may be that the second conductive end  1220  can be directly conducted to a conductive end of the first circuit board  23 . 
     Further, some of the electronic components  30  are conductively connected to the first circuit board  23  of the receiving module  20 , and some of the electronic components  30  are conductively connected to the second circuit board  12  of the floodlight module  10 . At least a part of the electronic component  30  is arranged on the back side of the first circuit board  23  of the receiving module  20 . Preferably, at least a part of the electronic component  30  of the floodlight assembly  100  is arranged on the back side of the first circuit board  23  of the receiving module  20 , for example, the electronic component  30  is implemented as a driver of the light-emitting element  111  of the floodlight module  10 , and it may also be a capacitor, a resistor, or the like. In other embodiments of the present invention, the at least part of the electronic components  30  arranged on the back side of the first circuit board  23  are the electronic components  30  of the receiving module assembly  200 , that is, it is used to support the operation of the receiving module  20 . In other embodiments of the present invention, the at least part of the electronic components  30  arranged on the back side of the first circuit board  23  is used to support the operation of the floodlight module  10 , and the others are used to support the operation of the receiving module  20 . 
     The back side of the first circuit board  23  of the receiving module  20  may be a flat surface, and the electronic components  30  may be arranged on the first circuit board  23  by mounting. A groove may be formed on the back side of the first circuit board  23  of the receiving module  20 , and the electronic component  30  can be mounted on the position of the groove, thereby lowering a thickness between the first circuit board  23  and the electronic component  30 . The electronic component  30  may also be arranged on the first circuit board  23  in a manner of being at least partially covered on the first circuit board  23 . Those skilled in the art can understand that the foregoing manner does not limit the connection manner between the electronic component  30  and the first circuit board  23 . 
     In this way, a size of the second circuit board  12  of the floodlight module  10  can be reduced because an installation space reserved by the second circuit board  12  of the floodlight module  10  for the electronic component  30  can be reduced, so that an area size of the entire floodlight module  10  can be reduced, and the requirements for size can be reduced, by which the electronic device main body  2  provides an installation space of the TOF camera module  1 . In other words, the electronic device main body  2  can accommodate more functional modules, such as a flashlight, and different types of camera modules, etc. 
     It is understandable that the electronic components  30  of the floodlight assembly  100  may be partially arranged on the back side of the first circuit board  23  of the receiving module assembly  200 , that is, the electronic components  30  of the floodlight assembly  100  may also be partially arranged on the front side of the second circuit board  12  of the floodlight module  10 . Whether the electronic components  30  of the floodlight assembly  100  are located on the second circuit board  12  of the floodlight module  10  or the first circuit board  23  of the receiving module assembly  200 , the electronic components  30  of the floodlight assembly  100  are conductively connected to the second circuit board  12  of the floodlight module  10  to make the floodlight assembly  100  to work. 
     The electronic components  30  of the floodlight module  10  located on the first circuit board  23  of the receiving module assembly  200  is conductively connected to the second circuit board  12  of the floodlight module  10  through the first circuit board  23  of the receiving module assembly  200 , and the electronic component  30  of the floodlight assembly  100  located on the second circuit board  12  of the floodlight module  10  contacts directly conductively to the second circuit board  12 . 
     Further, the electronic components  30  of the receiving module assembly  200  are arranged on the front side of the first circuit board  23  of the receiving module assembly  200 , and are located around the first photosensitive element  22 , and are respectively conductively connected to the first circuit board  23 . The electronic components  30  of the receiving module assembly  200  may be partially disposed on the back side of the first circuit board  23  of the receiving module assembly  200 , thereby facilitating the reduction of the size of the first circuit board  23  of the receiving module assembly  200 , because the space reserved by the first circuit board  23  of the receiving module  200  for the electronic components  30  of the receiving module assembly  200  can be reduced. The electronic components  30  of the receiving module assembly  200  located on the back side of the first circuit board  23  of the receiving module assembly  200  are conductively connected to the first circuit board  23 . 
     The receiving module  20  further includes a protective member  24 , wherein the protective member  24  is located below the first circuit board  23 , and the protective member  24  forms a protective cavity  240 , wherein the electronic components  30  located on the back side of the first circuit board  23  are accommodated in the protective cavity  240 . 
     In this example, the protective member  24  is a surrounding wall, the protective member  24  extends downward from the first circuit board  12 , and an opening of the protective cavity  240  is exposed to the outside, it can be directly observed on the back side of the first circuit board  12  that the electronic components  30  are installed on the back side of the first circuit board  12 , in this way, on one hand, it can avoid that the contact of dust and other contaminants with the electronic component  30  located on the back side of the first circuit board  23 , on the other hand, the protective member  24  keeps the electronic component  30  in a relatively suspended state, wherein the protective member  24  is preferably higher than the electronic component  30 , so that when the TOF camera module  1  is installed in the electronic device main body  2 , the TOF camera module  1  is supported by the protective member  24  in the electronic device main body  2 , thereby preventing the electronic component  30  from being squeezed during the installation process, so that the electronic component  30  can be in a suspended state relative to the protective member  24 , that is, the back side of the electronic component  30  may not be in contact with the electronic device main body  2 , or the electronic component  30  does not have to withstand large squeezing. Specifically, the electronic components  30  and the protective member  24  are arranged on the back side of the first circuit board  23 , and the electronic components  30  are housed in the protective cavity  240  enclosed by the protective member  24 , the height of the electronic component  30  is preferably lower than the height of the protective member  24 . 
     In other examples of the present invention, referring to  FIG. 4B , the protective member  24  is arranged on the back side of the first circuit board  23  of the receiving module  20 , and the receiving module  20  further includes a protective layer  25 , wherein the protective layer  25  is located in the protective cavity  240  and is formed of a protective material. The protective material can be a protective material such as glue, the protective layer  25  can seal the electronic element  30  to a certain extent, for example, to prevent the electronic component  30  from being permeated by water or contaminated by other substances thereby affecting a normal operation of the electronic components  30 . 
     The electronic components  30  located on the first circuit board  23  of the receiving module assembly  200  may be mounted on the back side of the first circuit board  23 , or may be at least partially embedded inside the first circuit board  23 . Those skilled in the art can understand that the connection between the electronic components  30  located on the first circuit board  23  of the receiving module assembly  200  and the first circuit board  23  is only an example here but not a limitation. 
     The protective member  24  may be installed on the back side of the first circuit board  23 , or may be integrally formed with the first circuit board  23 . 
     In some examples of the present invention, the height range of the protective member  24  is 0.35 mm-0.5 mm. In some examples of the present invention, the height of the protective member  24  is 0.45 mm. 
     In this example, the area size of the TOF camera module  1  is within 10.5 mm*6.6 mm. In some examples of the present invention, the area size of the TOF camera module  1  is within 20 mm*6.1 mm. 
     Further, the TOF camera module includes a cover  70 , wherein the cover  70  is installed on the floodlight module  10  to protect the floodlight module  10 , and at the same time the light radiated by the light-emitting element  111  may pass through the cover  70  to propagate outward. 
     The floodlight module  10  and the receiving module  20  of the TOF camera module have a height difference, the range of the height difference does not exceed 0.15 mm, that is, the height difference range of the upper surfaces of the floodlight module  10  and the receiving module  20  does not exceed 0.15 mm, the height of the floodlight module  10  may be slightly higher than the height of the receiving module  20 , or the height of the floodlight module  10  may be slightly lower than the receiving module  20 . 
       FIG. 3  shows a TOF camera module  1  according to another preferred embodiment of the present invention. 
     Specifically, the TOF camera module  1  includes a floodlight assembly  100  and a receiving module assembly  200 , wherein the floodlight assembly  100  is conductively connected to the receiving module assembly  200 , the floodlight assembly  100  is used to emit light, and the light is reflected by at least one object, and the receiving module assembly  200  receives the reflected light, so as to obtain the depth information of the object based on the time difference or the phase difference between the emitted light and the reflected light. 
     The TOF camera module  1  includes a floodlight module  10 , a receiving module  20 , and at least one electronic component  30 , wherein at least one of the electronic components  30  is conductively connected to the floodlight module  10 , at least one of the electronic components  30  is conductively connected to the receiving module  20 . 
     Further, the floodlight assembly  100  includes the floodlight module  10  and at least one electronic component  30 , wherein the electronic component  30  is conductively connected to the floodlight module  10 . 
     The receiving module assembly  200  includes the receiving module  20  and at least one electronic component  30 , wherein the electronic component  30  is conductively connected to the receiving module  20 . 
     The TOF camera module  1  further includes a flexible connector  40 , wherein the flexible connector  40  is respectively conductively connected to the floodlight module  10  and the receiving module  20 , or in other words, the floodlight module  10  is conductively connected to the receiving module  20  through the flexible connector  40 , and the receiving module  20  is conductively connected to the floodlight module  10  through the flexible connector  40 . 
     The receiving module  20  includes a first lens assembly  21 , a first photosensitive element  22 , and a first circuit board  23 , wherein the first lens assembly  21  provides an optical path for light to pass through and reach the first photosensitive element  22  to perform photoelectric conversion, and the first photosensitive element  22  is conductively connected to the first circuit board  23 . 
     The first lens assembly  21  includes a first lens  211  and a base  212 , wherein the base  212  surrounds to form a light window, and the first lens  211  is supported on the base  212  and held at a photosensitive path of the first photosensitive element  22 , so that the light passes through the first lens  211  and then reaches the first photosensitive element  22  through the light window. 
     The floodlight module  10  includes a projection assembly  11  and a second circuit board  12 , wherein the projection assembly  11  is conductively connected to the second circuit board  12 , and the second circuit board  12  is conductively connected to the first circuit board  23  of the receiving module  20 . Specifically, the second circuit board  12  of the floodlight module  10  is conductively connected to the first circuit board  23  of the receiving module through the flexible connector  40 . 
     The projection assembly  11  further includes a light emitting element  111  and a bracket  112 , wherein the light emitting element  111  is conductively supported on the second circuit board  12 , and the bracket  112  is supported on the second circuit board  12  and the bracket  112  forms an accommodating cavity, and the light-emitting element  111  is accommodated in the accommodating cavity. 
     The projection assembly  11  may further include an optical auxiliary element  113 , wherein the optical auxiliary element  113  is supported by the bracket  112  and held in a light-emitting path of the light-emitting element  111 , and after the light-emitting element  111  emits light, the light passes through the optical auxiliary element  113  and then radiates outward. The optical auxiliary element  113  may be an optical diffractive element, and the optical auxiliary element  113  is used to assist the light-emitting element  111  to radiate light outward, and the type of the optical auxiliary element  113  is not a limitation to the present invention. 
     Further, the bracket  112  is integrally formed on the second circuit board  12 , such as being integrally formed by ceramic sintering, or being integrally formed by molding. The bracket  112  may also be installed on the second circuit board  12  by means of assembling. In this example, the bracket  112  is integrally formed on the second circuit board  12  by the ceramic sintering. 
     Referring to  FIG. 7A , the second circuit board  12  includes a conductive portion  121  and an insulating portion  122 , wherein the insulating portion  122  is connected to the conductive portion  121 , and the insulating portion  122  may be integrally formed with the bracket  112  on the conductive portion  121 , such as being integrally formed by molding, or by ceramic sintering. 
     It can be understood that the bracket  112  of the floodlight module  10  and the insulating portion  122  of the second circuit board  12  may be made of same or different materials. The heat dissipation performance of the material of the second circuit board  12  of the floodlight module  10  may be better than or close to that of the material of the bracket  112 . 
     Further, for the entire TOF camera module  1 , the height of the floodlight module  10  is generally lower than the height of the receiving module assembly  200 , for the floodlight module  10 , its height can be adjusted by the height of the bracket  112 , the higher the height of the bracket  112  is, the higher is the height of the floodlight module  10 , and the lower the height of the bracket  112  is, the lower is the height of the floodlight module  10 . 
     In some embodiments of the present invention, the height of the floodlight module  10  is within 4.5 mm. In some examples of the present invention, the height of the floodlight module  10  is between 4 mm and 4.5 mm. 
     In some examples of the present invention, the thickness of the first circuit board  23  of the receiving module  20  is within 0.4 mm, and may be 0.35 mm. The number of layers of the first circuit board  23  may be 3 to 7 layers, for example, 6 layers. 
     In this example, the second circuit board  12  of the floodlight module  10  is conductively connected to the first circuit board  23  of the receiving module  20  through the flexible connector  40 . The second circuit board  12  has a front side and a back side, wherein the front side of the second circuit board  12  is used to support the light emitting element  111 , and the light emitting element  111  is conductively connected to the second circuit board  12 . 
     The first circuit board  23  has a front side and a back side, wherein the front side of the first circuit board  23  is conductively connected to the first photosensitive element  22 , and the front side of the first circuit board  23  and the back side of the second circuit board  12  are opposed to each other. 
     The second circuit board  12  is provided with at least one first conductive end  1210  and at least one second conductive end  1220 , wherein the first conductive end  1210  is located on the front side of the second circuit board  12 , and the second conductive ends  1220  are located on a side surface of the second circuit board  12 , the first conductive ends  1210  and the second conductive ends  1220  can be conducted to each other, and the first conductive ends  1210  are conductively and directly contacted with the light-emitting element  111 . In this example, the first conductive end  1210  is formed on an upper surface of the conductive portion  121 , and the second conductive end  1220  is formed on a side surface of the conductive portion  121 . 
     When the floodlight module  10  is installed on the first circuit board  23  of the receiving module  20 , the second conductive end  1220  can be conducted to the first circuit board  23 . In this example, the second conductive end  1220  is conducted to the first circuit board  23  through the flexible connector  40 . 
     The second conductive end  1220  may be located on the back surface or the side surface of the second circuit board  12 . 
     In this example, the floodlight module  10  is still installed on the first circuit board  23  of the receiving module  20 , but the main body of the floodlight module  10  and the receiving module  20  are connected to each other through the flexible connector  40 , such as a soft board. 
     Further, a part of the electronic components  30  are conductively connected to the first circuit board  23  of the receiving module  20 , and a part of the electronic components  30  are conductively connected to the second circuit board  12  of the floodlight module  10 . The at least part of the electronic component  30  that is conductively connected to the floodlight module  10  is arranged on the back side of the first circuit board  23  of the receiving module  20 . In this way, the size of the second circuit board  12  of the floodlight module  10  can be reduced because the installation space reserved by the second circuit board  12  of the floodlight module  10  for the electronic component  30  can be reduced, so that an area size of the entire floodlight module  10  can be reduced, and the requirements of the installation space provided by the electronic device main body  2  for the TOF camera module  1  can be reduced. In other words, the electronic device main body  2  can accommodate more functional modules, such as a flashlight, and different types of camera modules, etc. 
     It is understandable that the electronic components  30  of the floodlight assembly  100  may be partially arranged on the back side of the first circuit board  23  of the receiving module  29 , that is, the electronic components  30  of the floodlight assembly  100  may also be partially arranged on the front side of the second circuit board  12  of the floodlight module  10 . Regardless of whether the electronic components  30  of the floodlight  10  are located on the second circuit board  12  of the floodlight module  10  or the first circuit board  23  of the receiving module  20 , the electronic components  30  of the floodlight assembly  100  are conductively connected to the second circuit board  12  of the floodlight module  10 . The electronic components  30  of the floodlight module  10  located on the first circuit board  23  of the receiving module  20  can be connected to the second circuit board  12  of the floodlight module  10  through the first circuit board  23  of the receiving module  20 , the electronic components  30  of the floodlight assembly  100  located on the second circuit board  12  of the floodlight module  10  is directly and conductively contacted with the second circuit board  12 . 
     Further, the electronic components  30  of the receiving module assembly  200  are arranged on the front side of the first circuit board  23  of the receiving module  20 , and located around the first photosensitive element  22 , and are respectively conductively connected to the first circuit board  23 . The electronic components  30  of the receiving module assembly  200  may be partially arranged on the back side of the first circuit board  23  of the receiving module  20 , thereby facilitating to reduce the size of the first circuit board  23  of the receiving module  20 , because the installation space reserved by the first circuit board  23  of the receiving module  20  for the electronic components  30  of the receiving module assembly  200  can be reduced. The electronic components  30  of the receiving module assembly  200  located on the back side of the first circuit board  23  of the receiving module  20  are conductively connected to the first circuit board  23 . 
     The receiving module  20  further includes a protective member  24 , wherein the protective member  24  is located below the first circuit board  23 , and the protective member  24  forms a protective cavity  240 , wherein the electronic components  30  located on the back side of the first circuit board  23  are accommodated in the protective cavity  240 . 
     In this way, on one hand, dust and other contaminants can be prevented from contacting the electronic components  30  located on the back side of the first circuit board  23 , and on the other hand, the protective member  24  keeps the electronic components  30  in a suspended state. 
     It is worth mentioning that, in this example, the protective member  24  includes a protective surrounding wall  241  and a protective bottom wall  242 , the protective surrounding wall  241  surrounds the protective cavity  240 , and the protective bottom wall  242  closes an opening of the protective cavity  240 , the protective bottom wall  242  is connected to the protective surrounding wall  241 , so that the contaminants cannot enter the protective cavity  240  from a bottom side upwards to cause a contamination to the electronic components  30 . 
     The electronic components  30  located on the first circuit board  23  of the receiving module  20  may be mounted on the back side of the first circuit board  23 , or may be at least partially covered on the first circuit board  23 . Those skilled in the art can understand that the connection between the electronic components  30  located on the first circuit board  23  of the receiving module  20  and the first circuit board  23  here is only an example but not a limitation. 
     The protective member  24  may be installed on the back side of the first circuit board  23 , or may be integrally formed with the first circuit board  23 . 
     It is understandable that the protective member  24  can be made of metal material, so that the TOF camera module  1  can be grounded through the protective member  24 , thereby further improving a grounding performance of the TOF camera module  1 , and at the same time, the protective member  24  made of metal material can also enhance the heat dissipation performance of the position. On one hand, it can help the first circuit board  23  to dissipate heat, and on the other hand, it can also help the electronic component  30  located on the front side of the first circuit board  23  or the back side of the first circuit board  23  dissipate heat. 
     Further, the TOF camera module includes a cover  70 , wherein the cover  70  is installed on the floodlight module  10  to protect the floodlight module  10 , and at the same time, the light radiated by the light-emitting element  111  may pass through the cover  70  to propagate outward. 
       FIGS. 4A and 4B  respectively show a modified embodiment of the TOF camera module  1  in the above preferred embodiment, in the example shown in  FIG. 4A , the protective member  24  is integrally formed on the first circuit board  23  of the receiving module  20 , and is located on the back side of the first circuit board  23 . 
     The first circuit board  23  of the receiving module  20  is conductively connected to the second circuit board  12  of the floodlight module  10  through the flexible connector  40 . 
     The electronic components  30  located on the first circuit board  23  of the receiving module  20  are embedded by the protective member  24  during the integral forming process of the protective member  24 . In this way, not only can the electronic components  30  be protected, but also a flat surface can be provided. The bottom side of the protective member  24  is the bottom surface of the TOF camera module  1 , so that the bottom surface of the TOF camera module  1  formed by a molding process can be a flat surface, which is convenient for subsequent installation of the TOF camera module  1  and other equipments described. 
     Optionally, the protective member  24  may be integrally formed on the back side of the first circuit board  23  by molding. The protective member  24  formed by the molding process has a slope, which facilitates the demolding of upper and lower molding die during the molding process. 
     Further, in this example, the bracket  112  and the second circuit board  12  are separately formed, that is, the bracket  112  is installed on the second circuit board  12 , such as in a way of adhering. 
     In the example shown in  FIG. 4B , the protective member  24  is provided on the back side of the first circuit board  23  of the receiving module  20 . 
     The second circuit board  12  of the floodlight module  10  is directly and conductively connected to the first circuit board  23  of the receiving module  20 . 
     The receiving module  20  further includes a protective layer  25 , wherein the protective layer  25  fills the position of the protective cavity  240  and is formed of a protective material, the protective material may be a protective material such as glue, the protective layer  25  can seal the electronic component  30  to a certain extent, for example, to prevent the electronic component  30  from being contaminated by water or other substances thereby affecting the normal operation of the electronic component  30 . The thickness of the protective layer  25  may be higher or lower than the height of the protective member  24 , and may also be equal to the height of the protective member  24 . 
       FIG. 5A  shows a TOF camera module  1  according to a preferred embodiment of the present invention. 
     Specifically, the TOF camera module  1  includes a floodlight assembly  100  and a receiving module assembly  200 , wherein the floodlight assembly  100  is conductively connected to the receiving module assembly  200 , so the floodlight assembly  100  is used to emit light, and the light is reflected by at least one object, and the receiving module assembly  200  receives the reflected light, so as to obtain the depth information of the object based on a time difference or a phase difference between the emitted light and the reflected light. 
     The TOF camera module  1  includes a floodlight module  10 , a receiving module  20 , and at least one electronic component  30 , wherein at least one of the electronic components  30  is conductively connected to the floodlight module  10 , at least one of the electronic components  30  is conductively connected to the receiving module  20 . 
     Further, the floodlight assembly  100  includes the floodlight module  10  and at least one electronic component  30 , wherein the electronic component  30  is conductively connected to the floodlight module  10 . The receiving module assembly  200  includes the receiving module  20  and at least one electronic component  30 , wherein the electronic component  30  is conductively connected to the receiving module  20 . 
     In another modified embodiment of the present invention, at least one of the electronic components  30  is arranged on the back side of the second circuit board  12  of the floodlight module  10 . 
     The TOF camera module  1  further includes a flexible connector  40 , wherein the flexible connector  40  is respectively conductively connected to the floodlight module  10  and the receiving module  20 , or in other words, the floodlight module  10  is conductively connected to the receiving module  20  through the flexible connector  40 , and the receiving module  20  is conductively connected to the floodlight module  10  through the flexible connector  40 . 
     The TOF camera module  1  further includes a support base  50 , wherein the support base  50  supports the floodlight module  10  on the receiving module  20 , and the floodlight module  10  and the receiving module  20  are connected to each other through the support base  50 . 
     It is worth noting that in this example, the support base  50  is a hollow structure. 
     The receiving module  20  includes a first lens assembly  21 , a first photosensitive element  22 , and a first circuit board  23 , wherein the first lens assembly  21  provides an optical path for light to pass through and reach the first photosensitive element  22  to perform photoelectric conversion, and the first photosensitive element  22  is conductively connected to the first circuit board  23 . 
     The first lens assembly  21  includes a first lens  211  and a base  212 , wherein the base  212  surrounds to form a light window, and the first lens  211  is supported on the base  212  and held in a photosensitive path of the first photosensitive element  22 , so that the light passes through the first lens  211  and then reaches the first photosensitive element  22  through the light window. 
     The floodlight module  10  includes a projection assembly  11  and a second circuit board  12 , wherein the projection assembly  11  is conductively connected to the second circuit board  12 , and the second circuit board  12  is conductively connected to the first circuit board  23  of the receiving module  20 . The second circuit board  12  may be a ceramic substrate, a rigid-flex board, a circuit board, or the like. 
     The projection assembly  11  further includes a light emitting element  111  and a bracket  112 , wherein the light emitting element  111  is conductively supported on the second circuit board  12 , and the bracket  112  is supported on the second circuit board  12  and the bracket  112  forms an accommodating cavity, and the light-emitting element  111  is accommodated in the accommodating cavity. 
     The projection assembly  11  may further include an optical auxiliary element  113 , wherein the optical auxiliary element  113  is supported by the bracket  112  and held in a light-emitting path of the light-emitting element  111 , and after the light-emitting element  111  emits light, the light passes through the optical auxiliary element  113  and then radiates outward. The optical auxiliary element  113  may be an optical diffractive element, and the optical auxiliary element  113  is used to assist the light-emitting element  111  to radiate light outward, the type of the optical auxiliary element  113  is not a limitation to the present invention. 
     Further, the bracket  112  may be integrally formed on the second circuit board  12 , such as by ceramic sintering. The bracket  112  may also be installed on the second circuit board  12  by means of assembling. 
     The second circuit board  12  includes a conductive portion  121  and an insulating portion  122 , wherein the insulating portion  122  is connected to the conductive portion  121 , and the insulating portion  122  and the bracket  112  can be integrally formed on the conductive portion  121 , such as by molding or ceramic sintering. 
     It can be understood that the bracket  112  of the floodlight module  10  and the insulating portion  122  of the second circuit board  12  may be made of same or different materials. The heat dissipation performance of the material of the second circuit board  12  of the floodlight module  10  may be better than or close to that of the material of the bracket  112 . 
     Further, for the entire TOF camera module  1 , the height of the floodlight module  10  is generally lower than the height of the receiving module  20 , and for the floodlight module  10 , its height can be adjusted by the height of the bracket  112 , the higher the height of the bracket  112  is, the higher is the height of the floodlight module  10 , and the lower the height of the bracket  112  is, the lower is the height of the floodlight module  10 . 
     In some embodiments of the present invention, the height of the floodlight module  10  is within 4.5 mm. In some examples of the present invention, the height of the floodlight module  10  is between 4 mm and 4.5 mm. 
     In this example, the second circuit board  12  of the floodlight module  10  is conductively connected to the first circuit board  23  of the receiving module  20  through the flexible connector  40  located in the support base  50 . 
     The second circuit board  12  is provided with at least one first conductive end  1210  and at least one second conductive end  1220 , wherein the first conductive end  1210  is located on the front side of the second circuit board  12 , and the second conductive ends  1220  are located on a side of the second circuit board  12 , the first conductive ends  1210  and the second conductive ends  1220  can be connected to each other, and the first conductive ends  1210  can be conductively directly contacted to the light-emitting element  111 . 
     When the floodlight module  10  is installed on the first circuit board  23  of the receiving module  20 , the second conductive end  1220  can be conducted to the first circuit board  23 . In this example, the second conductive end  1220  is conducted to the first circuit board  23  through the flexible connector  40 . 
     The support base  50  can be made by injection molding, molding, ceramic die-casting and other processes. 
     It is worth mentioning that in this example, the support base  50  is integrally formed on the second circuit board  12  of the floodlight module  10 . 
     It is understandable that the second circuit board  12  itself can be manufactured through an integrated manufacturing process such as injection molding, molding, and ceramic sintering, the production materials of the support base  50  and the insulating portion  122  of the second circuit board  12  can be different. After the second circuit board  12  is integrally formed, the support base  50  is integrally formed on the second circuit board  12 . Preferably, the second circuit board  12  is integrally formed by ceramic sintering. 
     The support base  50  and the insulating portion  122  may also be integrally formed on the conductive portion  121 , that is, the support base  50  and the insulating portion  122  of the second circuit board  12  may be integrally formed. This method is beneficial to the connection strength between the support base  50  and the floodlight module  20 . 
     Further, a part of the electronic components  30  are conductively connected to the first circuit board  23  of the receiving module  20 , and a part of the electronic components  30  are conductively connected to the second circuit board  12  of the floodlight module  10 . At least part of the electronic component  30  that is conductively connected to the floodlight module  10  is arranged on the back side of the first circuit board  23  of the receiving module  20 . In this way, the size of the second circuit board  12  of the floodlight module  10  can be reduced because the installation space reserved by the second circuit board  12  of the floodlight module  10  for the electronic component  30  can be reduced, so that an area size of the entire floodlight module  10  can be reduced, and the requirements of the installation space provided by the electronic device main body  2  for the TOF camera module  1  can be reduced. In other words, the electronic device main body  2  can accommodate more functional modules, such as a flashlight, and different types of camera modules, etc. 
     It is understandable that the electronic components  30  of the floodlight assembly  100  may be partially arranged on the back side of the first circuit board  23  of the receiving module  20 , that is, the electronic components  30  of the floodlight assembly  100  may also be partially arranged on the front side of the second circuit board  12  of the floodlight module  10 . Regardless of whether the electronic components  30  of the floodlight assembly  100  are located on the second circuit board  12  of the floodlight module  10  or the first circuit board  23  of the receiving module  20 , the electronic components  30  of the floodlight assembly  100  are conductively connected to the second circuit board  12  of the floodlight module  10 . The electronic components  30  of the floodlight assembly  100  located on the first circuit board  23  of the receiving module  20  are conductively connected to the second circuit board  12  of the floodlight module  10  through the first circuit board  23  of the receiving module  20  and the the flexible connector  40 , and the electronic components  30  of the floodlight assembly  100  located on the second circuit board  12  of the floodlight module  10  are directly and conductively contacted to the second circuit board  12 . 
     Further, the electronic components  30  of the receiving module assembly  200  are arranged on the front side of the first circuit board  23  of the receiving module  20 , and located around the first photosensitive element  22 , and are respectively conductively connected to the first circuit board  23 . The electronic components  30  of the receiving module assembly  200  may be partially arranged on the back side of the first circuit board  23  of the receiving module  20 , thereby facilitating to reduce the size of the first circuit board  23  of the receiving module  20 , because the installation space reserved by the first circuit board  23  of the receiving module  20  for the electronic components  30  of the receiving module assembly  200  can be reduced. The electronic components  30  of the receiving module assembly  200  located on the back side of the first circuit board  23  of the receiving module  20  are conductively connected to the first circuit board  23 . 
     The receiving module  20  further includes a protective member  24 , wherein the protective member  24  is located below the first circuit board  23 , and the protective member  24  forms a protective cavity  240 , wherein the electronic components  30  located on the back side of the first circuit board  23  are accommodated in the protective cavity  240 . On one hand, this can prevent dust and other contaminants from contacting the electronic components  30  located on the back side of the first circuit board  23 , and on the other hand, the protective member  24  keeps the electronic component  30  in a suspended state. 
     Specifically, the protective member  24  has a bottom side, the electronic component  30  has a front side and a back side, wherein the front side of the electronic component  30  is connected to the back side of the first circuit board  23  of the receiving module  20 , the back side of the electronic component  30  is exposed in the protective cavity  240 , and the position of the bottom side of the protective member  24  is lower than the back side of the electronic component  30 , so that when the TOF camera module  1  is installed on a circuit board of the electronic device main body  2 , the TOF camera module  1  is supported on the electronic device main body  2  via the bottom side of the protective member  24 , thereby preventing the electronic component  30  from being squeezed during the installation process, so that the electronic component  30  can be in a suspended state relative to the protective member  24 , that is, the back side of the electronic component  30  may not be in contact with the electronic device main body  2 , or the back side of the electronic component  30  may not have to bear large squeezing. 
     The electronic components  30  located on the first circuit board  23  of the receiving module  20  may be mounted on the back side of the first circuit board  23 , or may be at least partially covered on the first circuit board  23 . Those skilled in the art can understand that the connection between the electronic components  30  located on the first circuit board  23  of the receiving module  20  and the first circuit board  23  here is only an example but not a limitation. 
     The protective member  24  may be installed on the back side of the first circuit board  23 , or may be integrally formed with the first circuit board  23 . 
     In some examples of the present invention, the range of the height of the protective member  24  is 0.35 mm˜0.5 mm. In some examples of the present invention, the height of the protective member  24  is 0.45 mm. 
     In this example, the area size of the TOF camera module  1  is within 12 mm*7 mm. In some examples of the present invention, the area size of the TOF camera module  1  is within 11.6 mm*6.5 mm. 
     Further, the TOF camera module includes a cover  70 , wherein the cover  70  is installed on the floodlight module  10  to protect the floodlight module  10 , and at the same time, the light radiated by the light-emitting element  111  may pass through the cover  70  to propagate outward. 
       FIG. 5B  shows a modified embodiment of the TOF camera module  1  according to the above-mentioned preferred embodiment of the present invention. 
     Specifically, the TOF camera module  1  includes a floodlight assembly  100  and a receiving module assembly  200 , wherein the floodlight assembly  100  is conductively connected to the receiving module assembly  200 , the floodlight assembly  100  is used to emit light, and the light is reflected by at least one object, and the receiving module assembly  200  receives the reflected light, so as to obtain the depth information of the object based on a time difference or a phase difference between the emitted light and the reflected light. 
     The TOF camera module  1  includes a floodlight module  10 , a receiving module  20 , and at least one electronic component  30 , wherein at least one of the electronic components  30  is conductively connected to the floodlight module  10 , and at least one of the electronic components  30  is conductively connected to the receiving module  20 . 
     Further, the floodlight assembly  100  includes the floodlight module  10  and at least one electronic component  30 , wherein the electronic component  30  is conductively connected to the floodlight module  10 . The receiving module assembly  200  includes the receiving module  20  and at least one electronic component  30 , wherein the electronic component  30  is conductively connected to the receiving module  20 . 
     The TOF camera module  1  further includes a support base  50 , wherein the support base  50  supports the floodlight module  10  on the receiving module  20 . It is worth noting that in this example, the support base  50  has a hollow structure. 
     The TOF camera module  1  further includes a conductive member  60 , wherein the conductive member  60  includes a conductive body  61  and has a first connection end  611  and a second connection end  612 , and the first connection end  611  and the second connecting ends  612  are respectively located at two ends of the conductive body  61  and are conducted to the floodlight module  10  and the receiving module  20  respectively. The conductive body  61  can transmit electrical signals. The support base  50  is integrally formed on the conductive member  60 . It is worth mentioning that the conductive member  60  in the present invention may be a straight wire, so that the floodlight module  10  can communicate with the receiving module  20 ; the conductive element  60  may also be implemented as a multilayer to be arranged inside the support body  50  to implement conduction. 
     The support base  50  may be obtained by injection molding, molding, ceramic die-casting and other processes, and the conductive member  60  is wrapped by injection molding material, molding material or ceramic die-casting material. 
     The receiving module  20  includes a first lens assembly  21 , a first photosensitive element  22 , and a first circuit board  23 , wherein the first lens assembly  21  provides an optical path for light to pass through and reach the first photosensitive element  22  to perform photoelectric conversion, and the first photosensitive element  22  is conductively connected to the first circuit board  23 . 
     The first lens assembly  21  includes a first lens  211  and a base  212 , wherein the base  212  surrounds to form a light window, and the first lens  211  is supported on the base  212  and held at a photosensitive path of the first photosensitive element  22 , so that the light passes through the first lens  211  and then reaches the first photosensitive element  22  through the light window. 
     In this example, the first lens assembly  21  and the floodlight module  10  are independently held on the first circuit board  23  respectively. In other words, there is no physical contact between the first lens assembly  21  and the floodlight module  10  in space. 
     Optionally, the support base  50  may be integrally formed on the base  212 , and in a length direction, the base  212  and the support base  50  respectively provide a solid support for the first lens  211  and the floodlight module  10 . The integrated support base  50  and the base  212  make the combination between the two more stable. 
     Further, in this example, the floodlight module  10  includes a projection assembly  11  and a second circuit board  12 , wherein the projection assembly  11  is conductively connected to the second circuit board  12 ; the second circuit board  12  is conductively connected to the first circuit board  23  of the receiving module  20 . Specifically, the second circuit board  12  of the floodlight module  10  is conductively connected to the first circuit board  23  of the receiving module  20  through the conductive member  60 . The second circuit board  12  may be a ceramic substrate, a rigid-flex board, a circuit board, or the like. 
     The projection assembly  11  further includes a light emitting element  111  and a bracket  112 , wherein the light emitting element  111  is conductively supported on the second circuit board  12 , and the bracket  112  is supported on the second circuit board  12  and the bracket  112  forms an accommodating cavity, wherein the light-emitting element  111  is accommodated in the accommodating cavity. 
     The projection assembly  11  may further include an optical auxiliary element  113 , wherein the optical auxiliary element  113  is supported by the bracket  112  and held in a light-emitting path of the light-emitting element  111 , and after the light-emitting element  111  emits light, the light passes through the optical auxiliary element  113  and then radiates outward. The optical auxiliary element  113  may be an optical diffractive element, and the optical auxiliary element  113  is used to assist the light emitting element  111  to radiate light outward, and the type of the optical auxiliary element  113  is not a limitation to the present invention. 
     Further, the bracket  112  may be integrally formed on the second circuit board  12 , such as by ceramic sintering. The bracket  112  may also be installed on the second circuit board  12  by means of assembling. 
     Further, for the entire TOF camera module  1 , the height of the floodlight module  10  is generally lower than the height of the receiving module  20 , and for the floodlight module  10 , the height can be adjusted by the height of the bracket  112 , the higher the height of the bracket  112  is, the higher is the height of the floodlight module  10 , and the lower the height of the bracket  112  is, the lower is the height of the floodlight module  10 . 
     In some embodiments of the present invention, the height of the floodlight module  10  is within 4.5 mm. In some examples of the present invention, the height of the floodlight module  10  is between 4 mm and 4.5 mm. 
     In this example, the second circuit board  12  of the floodlight module  10  is conductively connected to the first circuit board  23  of the receiving module  20  through the conductive member  60 . The second circuit board  12  has a front side and a back side, wherein the front side of the second circuit board  12  is used to support the light emitting element  111 , and the light emitting element  111  is conductively connected to the second circuit board  12 . 
     The first circuit board  23  of the receiving module  20  has a front side and a back side, wherein the front side of the first circuit board  23  is conductively connected to the first photosensitive element  22 . 
     The second circuit board  12  is provided with at least one first conductive end  1210  and at least one second conductive end  1220 , wherein the first conductive end  1210  is located on the front side of the second circuit board  12 , and the second conductive end  1220  is located on the back side of the second circuit board  12 , the first conductive end  1210  and the second conductive end  1220  can be conducted to each other, and the first conductive end  1210  contacts conductively directly with the light-emitting element  111 . 
     When the floodlight module  10  is installed on the first circuit board  23  of the receiving module  20 , the second conductive end  1220  can be connected to the first circuit board  23 . In this example, the second conductive end  1220  is conducted to a conductive end of the first circuit board  23  through the conductive member  60 . 
     In specific implementation, it is necessary to apply conductive medium between the second conductive end  1220  of the second circuit board  12  of the floodlight module  10  and the first connection end  611  of the conductive member  60 , such as conductive silver glue, this can establish a stable electrical connection between the second circuit board  12  and the conductive member  60 . However, the commonly used conductive medium usually has fluidity, and it is inevitable that the conductive medium may overflow during the process of applying the conductive medium, which may cause the floodlight module  10  to be short-circuited and other faults. It is worth mentioning that the conductive medium can not only electrically connect the second circuit board  12  and the conductive member  60 , but also fix the second circuit board  12  and the conductive member  60 . 
     Correspondingly, in view of the above technical problems, in a preferred embodiment of the present invention, the support base  50  is further provided with at least one groove  500 , wherein the groove  500  is respectively provided on an electrical connection site of the second circuit board  12  and the conductive member  60 , this is used to prevent the overflow of the conductive medium from causing the floodlight module  10  to be short-circuited. More specifically, as shown in  FIG. 5B , in a preferred embodiment of the present invention, the groove  500  is formed as a recess on an upper surface of the support base  50 , and the first connection end  611  of the conductive member  60  is exposed to at least one of the grooves  500 . Correspondingly, when the floodlight module  20  is mounted on the upper surface of the support base  50 , the second conductive ends  1220  are respectively corresponded to and embedded in the groove  500  to contact with the conductive member  611  of the conductive member  60 . Here, at least one of the grooves  500  is provided with a conductive medium, and when the floodlight module  10  is mounted on the support base  50 , at least one of the grooves  500  is sealed by the second circuit board  12  to prevent the conductive medium from overflowing and causing short-circuit and other faults. 
     It is worth mentioning that when the floodlight module  10  is mounted on the support base  50 , the groove  500  can be regarded as an alignment reference of the floodlight module  10 , which is beneficial to make the floodlight module  10  be positioned and installed on the upper surface of the support base  50 . 
     The conductive member  60  can be embedded in the support base  50 , which can avoid short-circuit and other faults between the conductive members  60 , and can also prevent the conductive member  60  from being oxidized. 
     When the support base  50  is integrally formed by molding, a penetrating hole may be formed in the support base  50 , and then the conductive member  60  may be installed in the through hole. 
     In this example, the floodlight module  10  is still installed on the first circuit board  23  of the receiving module  20 , but the floodlight module  10  and the receiving module  20  are connected to each other through the conductive member  60 . 
     The support base  50  can be made by injection molding, molding, ceramic die-casting and other processes. The surface of the conductive body  61  of the conductive member  60  may be covered with a layer of insulating material. 
     Further, a part of the electronic components  30  are conductively connected to the first circuit board  23  of the receiving module  20 , and a part of the electronic components  30  are conductively connected to the second circuit board  12  of the floodlight module  10 . The at least part of the electronic component  30  that is conductively connected to the floodlight module  10  is arranged on the back side of the first circuit board  23  of the receiving module  20 . In this way, the size of the second circuit board  12  of the floodlight module  10  can be reduced because the installation space reserved by the second circuit board  12  of the floodlight module  10  for the electronic components  30  can be reduced, so that an area size of the entire floodlight module  10  can be reduced, and the requirements for size can be reduced, by which the electronic device main body  2  provides an installation space for the TOF camera module  1 . In other words, the electronic device main body  2  can accommodate more functional modules, such as a flashlight, and different types of camera modules, etc. 
     It is understandable that the electronic components  30  of the floodlight module  10  may be partially arranged on the back side of the first circuit board  23  of the receiving module  20 , that is, the electronic components  30  of the floodlight assembly  100  may also be partially arranged on the front side of the second circuit board  12  of the floodlight module  10 . Regardless of whether the electronic components  30  of the floodlight assembly  100  are located on the second circuit board  12  of the floodlight module  10  or the first circuit board  23  of the receiving module  20 , the electronic components  30  of the floodlight assembly  100  are conductively connected to the second circuit board  12  of the floodlight module  10 . The electronic components  30  of the floodlight assembly  100  located on the first circuit board  23  of the receiving module  20  are conductively connected to the second circuit board  12  of the floodlight module  10  through the first circuit board  23  of the receiving module  20  and the conductive member  60 , and the electronic components  30  of the floodlight module  10  located on the second circuit board  12  of the floodlight module  10  are directly and conductively contacted with the second circuit board  12 . 
     Further, the electronic components  30  of the receiving module assembly  200  are arranged on the front side of the first circuit board  23  of the receiving module  20 , and are located around the first photosensitive element  22 , and are respectively conductively connected to the first circuit board  23 . The electronic components  30  of the receiving module assembly  200  may be partially arranged on the back side of the first circuit board  23  of the receiving module  20 , thereby facilitating to reduce the size of the first circuit board  23  of the receiving module  20 , because the installation space reserved by the first circuit board  23  of the receiving module  20  for the electronic components  30  of the receiving module assembly  200  can be reduced. The electronic components  30  of the receiving module assembly  200  located on the back side of the first circuit board  23  of the receiving module  20  are conductively connected to the first circuit board  23 . 
     The receiving module  20  further includes a protective member  24 , wherein the protective member  24  is located below the first circuit board  23 , and the protective member  24  forms a protective cavity  240 , and the electronic components  30  located on the back side of the first circuit board  23  are accommodated in the protective cavity  240 . 
     In this way, on one hand, dust and other contaminants can be prevented from contacting the electronic components  30  located on the back side of the first circuit board  23 , and on the other hand, the protective member  24  keeps the electronic components  30  in a suspended state. Specifically, the protective member  24  has a bottom side, and the electronic component  30  has a front side and a back side, wherein the front side of the electronic component  30  is connected to the back side of the first circuit board  23  of the receiving module  20 , and the back side of the electronic component  30  is exposed in the protective cavity  240 , and the position of the bottom side of the protective member  24  is lower than the back side of the electronic component  30 , thereby when the TOF camera module  1  is installed on a circuit board of the electronic device main body  2 , the TOF camera module  1  is supported on the electronic device main body  2  through the bottom side of the protective member  24 , this prevents the electronic component  30  from being squeezed during the installation process, so that the electronic component  30  can be in a suspended state relative to the protective member  24 , that is, the back side of the electronic component  30  may not be in contact with the electronic device main body  2 , or the back side of the electronic component  30  may not have to bear large squeezing. 
     The electronic components  30  located on the first circuit board  23  of the receiving module  20  may be embedded on the back side of the first circuit board  23 , or may be at least partially embedded on the first circuit board  23 . Those skilled in the art can understand that the connection between the electronic components  30  located on the first circuit board  23  of the receiving module  20  and the first circuit board  23  here is only an example but not a limitation. 
     The protective member  24  may be installed on the back side of the first circuit board  23 , or may be integrally formed with the first circuit board  23 . 
     It is understandable that the protective member  24  can be made of a metal material, so that the TOF camera module  1  can be grounded through the protective member  24  to further provide the grounding performance of the TOF camera module  1 . Meanwhile, the protective member  24  made of metal material can also enhance the heat dissipation performance on the position, and on one hand, it can help the first circuit board  23  to dissipate heat, and on the other hand, it can also help the electronic component  30  located on the front side of the first circuit board  23  or on the back side of the first circuit board  23  dissipate heat. 
     In some other examples of the present invention, the support base  50  is connected to the floodlight module  10  and the receiving module  20  by means of assembling. 
     The second circuit board  12  of the floodlight module  10  is conductively connected to the first circuit board  23  of the receiving module  20  through the conductive member  60  in the support base  50 , therefore, the at least part of the electronic components  30  located on the back side of the first circuit board  23  are conductively connected to the second circuit board  12  of the floodlight module  10  through the first circuit board  23  and the conductive member  60 . 
     In some other examples of the present invention, the protective member  24  is integrally formed on the first circuit board  23  of the receiving module  20  and is located on the back side of the first circuit board  23 . The electronic components  30  located on the first circuit board  23  of the receiving module  20  are embedded on the protective member  24  during the integral forming process of the protective member  24 . In this way, not only can the electronic components  30  be protected, but also a flat surface can be provided. The bottom side of the protective member  24  is the lower surface of the TOF camera module  1 , so that the lower surface of the TOF camera module  1  formed by a molding process can be a flat surface, which is convenient for subsequent installation of the TOF camera module  1  and other devices described. 
     In other examples of the present invention, such as the example shown in  FIG. 4B , the protective member  24  is provided on the back side of the first circuit board  23  of the receiving module  20  and the receiving module  20  further includes a protective layer  25 , wherein the protective layer  25  is located in the protective cavity  240  and is formed of a protective material, the protective material can be a protective material such as glue, the protective layer  25  can seal the electronic component  30  to a certain extent. For example, if the electronic component  30  is permeated by water or is contaminated by other substances, a normal operation of the electronic component  30  will be affected. 
     It is understandable that in other examples of the present invention, the support base  50  may be integrally formed on the first circuit board  23  of the receiving module  20 . 
     Further, the TOF camera module includes a cover  70 , wherein the cover  70  is installed on the floodlight module  10  to protect the floodlight module  10 , and at the same time, the light radiated by the light-emitting element  111  may pass through the cover  70  to propagate outward. 
       FIG. 6A  shows a TOF camera module  1  according to a preferred embodiment of the present invention. 
     Specifically, the TOF camera module  1  includes a floodlight assembly  100  and a receiving module assembly  200 , wherein the floodlight assembly  100  is conductively connected to the receiving module assembly  200 , so the floodlight assembly  100  is used to emit light, and the light is reflected by at least one object, and the receiving module assembly  200  receives the reflected light, so as to obtain the depth information of the object based on a time difference or a phase difference between the emitted light and the reflected light. 
     The TOF camera module  1  includes a floodlight module  10 , a receiving module  20 , and at least one electronic component  30 , wherein at least one of the electronic components  30  is conductively connected to the floodlight module  10 , and at least one of the electronic components  30  is conductively connected to the receiving module  20 . 
     Further, the floodlight assembly  100  includes the floodlight module  10  and at least one electronic component  30 , wherein the electronic component  30  is conductively connected to the floodlight module  10 . The receiving module assembly  200  includes the receiving module  20  and at least one electronic component  30 , wherein the electronic component  30  is electrically connected to the receiving module  20 . 
     The TOF camera module  1  further includes a flexible connector  40 , wherein the flexible connector  40  is conductively connected to the floodlight module  10  and the receiving module  20 , or in other words, the floodlight module  10  is conductively connected to the receiving module  20  through the flexible connector  40 , and the receiving module  20  is conductively connected to the floodlight module  10  through the flexible connector  40 . 
     The TOF camera module  1  further includes a support base  50 , wherein the support base  50  supports the floodlight module  10  on the receiving module  20 . 
     The receiving module  20  includes a first lens assembly  21 , a first photosensitive element  22 , and a first circuit board  23 , wherein the first lens assembly  21  provides an optical path for light to pass through and reach the first photosensitive element  22  to perform photoelectric conversion, and the first photosensitive element  22  is conductively connected to the first circuit board  23 . 
     The first lens assembly  21  includes a first lens  211  and a base  212 , wherein the base  212  surrounds to form a light window, and the first lens  211  is supported on the base  212  and held at the photosensitive path of the first photosensitive element  22 , so that the light passes through the first lens  211  and then reaches the first photosensitive element  22  through the light window. The floodlight module  10  includes a projection assembly  11  and a second circuit board  12 , wherein the projection assembly  11  is conductively connected to the second circuit board  12 , and the second circuit board  12  is conductively connected to the first circuit board  23  of the receiving module  20 . The second circuit board  12  may be a ceramic substrate, a rigid-flex board, a circuit board, or the like. 
     The projection assembly  11  further includes a light emitting element  111  and a bracket  112 , wherein the light emitting element  111  is conductively supported on the second circuit board  12 , and the bracket  112  is supported on the second circuit board  12  and the bracket  112  forms an accommodating cavity, and the light-emitting element  111  is accommodated in the accommodating cavity. 
     The projection assembly  11  may further include an optical auxiliary element  113 , wherein the optical auxiliary element  113  is supported by the bracket  112  and held in a light-emitting path of the light-emitting element  111 , and after the light-emitting element  111  emits light, the light passes through the optical auxiliary element  113  and then radiates outward. The optical auxiliary element  113  may be an optical diffractive element, and the optical auxiliary element  113  is used to assist the light emitting element  111  to radiate light outward, and the type of the optical auxiliary element  113  is not a limitation to the present invention. 
     Further, the bracket  112  may be integrally formed on the second circuit board  12 , such as by ceramic sintering. The bracket  112  may also be installed on the second circuit board  12  by means of assembling. 
     The second circuit board  12  includes a conductive portion  121  and an insulating portion  122 , wherein the insulating portion  122  is connected to the conductive portion  121 , and the insulating portion  122  and the bracket  112  can be integrally formed on the conductive portion  121 , such as integrally formed by molding. 
     It can be understood that the bracket  112  of the floodlight module  10  and the insulating portion  122  of the second circuit board  12  may be made of same or different materials. The heat dissipation performance of the material of the second circuit board  12  of the floodlight module  10  may be better than or close to that of the material of the bracket  112 . 
     Further, for the entire TOF camera module  1 , the height of the floodlight module  10  is generally lower than the height of the receiving module  20 , and for the floodlight module  10 , the height can be adjusted by the height of the bracket  112 ; the higher the height of the bracket  112  is, the higher is the height of the floodlight module  10 , and the lower the height of the bracket  112  is, the lower is the height of the floodlight module  10 . 
     In some embodiments of the present invention, the height of the floodlight module  10  is within 4.5 mm. In some examples of the present invention, the height of the floodlight module  10  is between 4 mm and 4.5 mm. 
     In this example, the support base  50  is integrally formed on the second circuit board  12  of the floodlight module  10 , and after the second circuit board  12  is formed, the support base  50  is integrally formed on the second circuit board  12 . Further, the support base  50  and the second circuit board  12  are made of different materials. It is worth mentioning that, in this example, the support base  50  is integrally formed on the base  212 , in a length direction, the base  212  and the support base  50  provides a solid support for the first lens  211  and the floodlight module  10 , respectively. The integrated support base  50  and the base  212  make the combination between the two more stable. 
     Furthermore, in this example, the bracket  112 , the support base  50  and the second circuit board  12  are integrally formed, so that the floodlight module  10  has a solid structure. More specifically, the bracket  112 , the support base  50 , and the second circuit board  12  are integrally formed by a ceramic process, and then the floodlight module  10  with the support base  50  is installed on the first circuit board  23 . 
     Optionally, the bracket  112  and the support base  50  may be installed on the second circuit board  12  respectively. The material of the bracket  112 , the support base  50 , and the insulating portion  12  of the second circuit board  12  may be the same or different. 
     Specifically, the second circuit board  12  of the floodlight module  10  is conductively connected to the first circuit board  23  of the receiving module  20  through the flexible connector  40 . 
     The second circuit board  12  is provided with at least one first conductive end  1210  and at least one second conductive end  1220 , wherein the first conductive end  1210  is located on the front side of the second circuit board  12 , and the second conductive end  1220  is located on a side of the second circuit board  12 , the first conductive ends  1210  and the second conductive ends  1220  can be connected to each other, and the first conductive ends  1210  are conductively and directly contacted with the light-emitting element  111 . In this example, the first conductive end  1210  is formed on an upper surface of the conductive portion  121 , and the second conductive end  1220  is formed on a side of the conductive portion  121 . 
     When the floodlight module  10  is installed on the first circuit board  23  of the receiving module  20 , the second conductive end  1220  can be connected to the first circuit board  23 . In this example, the first conductive end  1210  is electrically connected to the first circuit board  23  through the flexible connector  40 . 
     Further, a part of the electronic components  30  are conductively connected to the first circuit board  23  of the receiving module  20 , and a part of the electronic components  30  are conductively connected to the second circuit board  12  of the floodlight module  10 . The at least part of the electronic component  30  that is conductively connected to the floodlight module  10  is arranged on the back side of the first circuit board  23  of the receiving module  20 . In this way, the size of the second circuit board  12  of the floodlight module  10  can be reduced because the installation space reserved by the second circuit board  12  of the floodlight module  10  for the electronic component  30  can be reduced, so that an area size of the entire floodlight module  10  can be reduced, and the requirements for size can be reduced, by which the electronic device main body  2  provides an installation space of the TOF camera module  1 . In other words, the electronic device main body  2  can accommodate more functional modules, such as a flashlight, and different types of camera modules, etc. 
     It is understandable that the electronic components  30  of the floodlight assembly  100  may be partially arranged on the back side of the first circuit board  23  of the receiving module  20 , that is, the electronic components  30  of the floodlight assembly  100  may also be partially arranged on the front side of the second circuit board  12  of the floodlight module  10 . Regardless of whether the electronic components  30  of the floodlight assembly  100  are located on the second circuit board  12  of the floodlight module  10  or the first circuit board  23  of the receiving module  20 , the electronic components  30  of the floodlight assembly  100  are conductively connected to the second circuit board  12  of the floodlight module  10 . The electronic components  30  of the floodlight assembly  100  located on the first circuit board  23  of the receiving module  20  is conductively connected to the second circuit board  12  of the floodlight module  10  through the first circuit board  23  of the receiving module  20  and the flexible connector  40 , and the electronic components  30  of the floodlight assembly  100  located on the second circuit board  12  of the floodlight module  10  are directly and conductively contacted to the second circuit board  12 . 
     Further, the electronic components  30  of the receiving module assembly  200  are arranged on the front side of the first circuit board  23  of the receiving module assembly  200 , are located around the first photosensitive element  22 , and are respectively conductively connected to the first circuit board  23 . The electronic components  30  of the receiving module assembly  200  may be partially arranged on the back side of the first circuit board  23  of the receiving module  20 , thereby facilitating to reduce the size of the first circuit board  23  of the receiving module  20 , because the installation space reserved by the first circuit board  23  of the receiving module  20  for the electronic components  30  of the receiving module assembly  200  can be reduced. The electronic components  30  of the receiving module assembly  200  located on the back side of the first circuit board  23  of the receiving module  20  are conductively connected to the first circuit board  23 . 
     The receiving module  20  further includes a protective member  24 , wherein the protective member  24  is located below the first circuit board  23 , and the protective member  24  forms a protective cavity  240 , wherein the electronic components  30  located on the back side of the first circuit board  23  are accommodated in the protective cavity  240 . 
     It is worth mentioning that, in this example, the protective member  24  includes a protective surrounding wall  241  and a protective bottom wall  242 , the protective surrounding wall  241  surrounds to form the protective cavity  240 , and the protective bottom wall  242  closes an opening of the protective cavity  240 , and the protective bottom wall  242  is connected to the protective surrounding wall  241 , so that contaminants cannot enter the protective cavity  240  from a bottom side upward to cause a contamination to the electronic components  30 . 
     The electronic components  30  located on the first circuit board  23  of the receiving module  20  may be mounted on the back side of the first circuit board  23 , or may be at least partially embedded on the first circuit board  23 . Those skilled in the art can understand that the connection between the electronic components  30  located on the first circuit board  23  of the receiving module  20  and the first circuit board  23  here is only an example but not a limitation. The protective member  24  may be installed on the back side of the first circuit board  23 , or may be integrally formed with the first circuit board  23 . 
     In some examples of the present invention, the range of the height of the protective member  24  is 0.35 mm˜0.5 mm. In some examples of the present invention, the height of the protective member  24  is 0.45 mm. 
     In this example, the area size of the TOF camera module  1  is within 12 mm*7 mm. In some examples of the present invention, the area size of the TOF camera module  1  is within 11.6 mm*6.5 mm. 
     Further, the TOF camera module includes a cover  70 , wherein the cover  70  is installed on the floodlight module  10  to protect the floodlight module  10 , and at the same time, the light radiated by the light-emitting element  111  may pass through the cover  70  to propagate outward. 
       FIG. 6B  shows a modified embodiment of the TOF camera module  1  according to the above-mentioned preferred embodiment of the present invention. 
     Specifically, the TOF camera module  1  includes a floodlight assembly  100  and a receiving module assembly  200 , wherein the floodlight assembly  100  is conductively connected to the receiving module assembly  200 , so the floodlight assembly  100  is used to emit light, and the light is reflected by at least one object, and the receiving module assembly  200  receives the reflected light, so as to obtain the depth information of the object based on a time difference or a phase difference between the emitted light and the reflected light. 
     The TOF camera module  1  includes a floodlight module  10 , a receiving module  20 , and at least one electronic component  30 , wherein at least one of the electronic components  30  is conductively connected to the floodlight module  10 , and at least one of the electronic components  30  is conductively connected to the receiving module  20 . 
     Further, the floodlight assembly  100  includes the floodlight module  10  and at least one electronic component  30 , wherein the electronic component  30  is conductively connected to the floodlight module  10 . The receiving module assembly  200  includes the receiving module  20  and at least one electronic component  30 , wherein the electronic component  30  is electrically connected to the receiving module  20 . 
     The TOF camera module  1  further includes a support base  50 , wherein the support base  50  supports the floodlight module  10  on the receiving module  20 . The TOF camera module  1  further includes a conductive member  60 , wherein the conductive member  60  includes a conductive body  61  and has a first connection end  611  and a second connection end  612 , wherein the first connection end  611  and the second connecting ends  612  are respectively located at two ends of the conductive body  61  and are conducted to the floodlight module  10  and the receiving module  20  respectively. The conductive body  61  can transmit electrical signals. The support base  50  is integrally formed on the conductive member  60 . 
     The support base  50  may be obtained by injection molding, molding, ceramic die-casting and other processes, and the conductive member  60  is wrapped by injection molding material, molding material or ceramic die-casting material. 
     The receiving module  20  includes a first lens assembly  21 , a first photosensitive element  22 , and a first circuit board  23 , wherein the first lens assembly  21  provides an optical path for light to pass through and reach the first photosensitive element  22  to perform photoelectric conversion, and the first photosensitive element  22  is conductively connected to the first circuit board  23 . 
     The first lens assembly  21  includes a first lens  211  and a base  212 , wherein the base  212  surrounds to form a light window, and the first lens  211  is supported on the base  212  and held at a photosensitive path of the first photosensitive element  22 , so that light passes through the first lens  211  and then reaches the first photosensitive element  22  through the light window. The receiving module  20  includes a base bracket  26  supported on the first circuit board  23 . The base  212  is supported by the base bracket  26 . 
     It is worth mentioning that, in this example, the support base  50  is integrally formed on the base  212 , in a length direction, the base  212  and the support base  50  provide a solid support for the first lens  211  and the floodlight module  10 , respectively. The integrated support base  50  and the base  212  make the combination between the two more stable. 
     Furthermore, in this example, the bracket  112 , the support base  50  and the second circuit board  12  are integrally formed, so that the floodlight module  10  has a solid structure. More specifically, the bracket  112 , the support base  50 , and the second circuit board  12  are integrally formed by a ceramic process, and then the floodlight module  10  with the support base  50  is installed on the first circuit board  23 . 
     The floodlight module  10  includes a projection assembly  11  and a second circuit board  12 , wherein the projection assembly  11  is conductively connected to the second circuit board  12 , and the second circuit board  12  is conductively connected with the first circuit board  23  of the receiving module  20 . Specifically, the second circuit board  12  of the floodlight module  10  is conductively connected to the first circuit board  23  of the receiving module  20  through the conductive member  60 . The second circuit board  12  may be a ceramic substrate, a rigid-flex board, a circuit board, or the like. 
     The projection assembly  11  further includes a light emitting element  111  and a bracket  112 , wherein the light emitting element  111  is conductively supported on the second circuit board  12 , and the bracket  112  is supported on the second circuit board  12  and the bracket  112  forms an accommodating cavity, wherein the light-emitting element  111  is accommodated in the accommodating cavity. 
     The projection assembly  11  may further include an optical auxiliary element  113 , wherein the optical auxiliary element  113  is supported by the bracket  112  and held in a light-emitting path of the light-emitting element  111 , and after the light-emitting element  111  emits light, the light passes through the optical auxiliary element  113  and then radiates outward. The optical auxiliary element  113  may be an optical diffractive element, and the optical auxiliary element  113  is used to assist the light emitting element  111  to radiate light outward, and the type of the optical auxiliary element  113  is not a limitation to the present invention. 
     Further, the bracket  112  may be integrally formed on the second circuit board  12 , such as by ceramic sintering. The bracket  112  may also be installed on the second circuit board  12  by means of assembling. 
     Further, the support base  50  and the base  212  of the receiving module  20  are integrally formed. It may be that after the base  212  is formed, the support base  50  is integrally formed on the base  212 , or it may be that the support base  50  and the base  212  of the receiving module  20  are integrally formed. In other words, the materials of the support base  50  and the base  212  may be same or different. 
     Further, for the entire TOF camera module  1 , the height of the floodlight module  10  is generally lower than the height of the receiving module  20 , and for the floodlight module  10 , the height can be adjusted by the height of the bracket  112 , the higher the height of the bracket  112  is, the higher is the height of the floodlight module  10 , and the lower the height of the support  112  is, the lower is the height of the floodlight module  10 . 
     In some embodiments of the present invention, the height of the floodlight module  10  is within 4.5 mm. In some examples of the present invention, the height of the floodlight module  10  is between 4 mm and 4.5 mm. 
     In this example, the second circuit board  12  of the floodlight module  10  is conductively connected to the first circuit board  23  of the receiving module  20  through the conductive member  60 . The second circuit board  12  has a front side and a back side, wherein the front side of the second circuit board  12  is used to support the light emitting element  111 , and the light emitting element  111  is conductively connected to the second circuit board  12 . The first circuit board  23 . 
     The first circuit board  23  of the receiving module  20  has a front side and a back side, wherein the front side of the first circuit board  23  is conductively connected to the first photosensitive element  22 , the front side of the first circuit board  23  and the back side of the first circuit board  23  are opposed to each other. 
     The TOF camera module  1  is provided with at least one first conductive end  1210  and at least one second conductive end  1220 , wherein the first conductive end  1210  is located on the front side of the second circuit board  12 , and the second conductive ends  1220  are located on a back side of the support base  50 , and the back side of the support base  50  directly contacts the front side of the first circuit board  23 , so that the second conductive end  1220  is directly conducted to the first circuit board  23 , thus, the first circuit board  12  of the floodlight module  10  can be conducted to the first circuit board  23  of the receiving module  20 . It can be understood that the conduction between the support base  50  and the second circuit board  12  of the floodlight module  10  may be a penetrating conductive member, which is not shown in the figure. 
     The floodlight module  10  and the support base  50  are installed on the first circuit board  23  of the receiving module  20 , and the second conductive end  1220  can be conducted to the first circuit board  23 . 
     Further, a part of the electronic components  30  are conductively connected to the first circuit board  23  of the receiving module  20 , and a part of the electronic components  30  are conductively connected to the second circuit board  12  of the floodlight module  10 . The at least part of the electronic component  30  that is conductively connected to the floodlight module  10  is arranged on the back side of the first circuit board  23  of the receiving module  20 . In this way, the size of the second circuit board  12  of the floodlight module  10  can be reduced because the installation space reserved by the second circuit board  12  of the floodlight module  10  for the electronic component  30  can be reduced, so that an area size of the entire floodlight module  10  can be reduced, and the requirements for size can be reduced, by which the electronic device main body  2  provides an installation space for the TOF camera module  1 . In other words, the electronic device main body  2  can accommodate more functional modules, such as a flashlight, and different types of camera modules, etc. 
     It is understandable that the electronic components  30  of the floodlight assembly  100  may be partially arranged on the back side of the first circuit board  23  of the receiving module  20 , that is, the electronic components  30  of the floodlight assembly  100  may also be partially arranged on the front side of the second circuit board  12  of the floodlight module  10 . Regardless of whether the electronic components  30  of the floodlight assembly  100  are located on the second circuit board  12  of the floodlight module  10  or the first circuit board  23  of the receiving module  20 , the electronic components  30  of the floodlight assembly  100  are conductively connected to the second circuit board  12  of the floodlight module  10 . The electronic components  30  of the floodlight assembly  100  located on the first circuit board  23  of the receiving module  20  is conductively connected to the second circuit board  12  of the floodlight module  10  through the first circuit board  23  of the receiving module  20  and the conductive member  60 , and the electronic components  30  of the floodlight assembly  100  located on the second circuit board  12  of the floodlight module  10  are directly and conductively contacted with the second circuit board  12 . 
     Further, the electronic components  30  of the receiving module assembly  200  are arranged on the front side of the first circuit board  23  of the receiving module assembly  200 , are located around the first photosensitive element  22 , and are respectively conductively connected to the first circuit board  23 . The electronic components  30  of the receiving module assembly  200  may be partially arranged on the back side of the first circuit board  23  of the receiving module  20 , thereby facilitating to reduce the size of the first circuit board  23  of the receiving module  20 , because the installation space reserved by the first circuit board  23  of the receiving module  20  for the electronic components  30  of the receiving module assembly  200  can be reduced. The electronic components  30  of the receiving module assembly  200  located on the back side of the first circuit board  23  of the receiving module  20  are conductively connected to the first circuit board  23 . 
     The receiving module  20  further includes a protective member  24 , wherein the protective member  24  is located below the first circuit board  23 , and the protective member  24  forms a protective cavity  240 , and the electronic components  30  located on the back side of the first circuit board  23  are accommodated in the protective cavity  240 . On one hand, this can prevent dust and other contaminants from contacting the electronic components  30  located on the back side of the first circuit board  23 , on the other hand, the protective member  24  keeps the electronic component  30  in a suspended state. Specifically, the protective member  24  has a bottom side, the electronic component  30  has a front side and a back side, and the front side of the electronic component  30  is connected to the back side of the first circuit board  23  of the receiving module  20 , the back side of the electronic component  30  is exposed in the protective cavity  240 , and the position of the bottom side of the protective member  24  is lower than that of the electronic component  30 , so that when the TOF camera module  1  is installed on a circuit board of the electronic device main body  2 , the TOF camera module  1  is supported on the electronic device main body  2  via the bottom side of the protective member  24 , this prevents the electronic component  30  from being squeezed during the installation process, so that the electronic component  30  can be in a suspended state relative to the protective member  24 , that is, the back side of the electronic component  30  may not be in contact with the electronic device main body  2 , or the back side of the electronic component  30  may not have to bear large squeezing. 
     The electronic components  30  located on the first circuit board  23  of the receiving module  20  may be mounted on the back side of the first circuit board  23 , or may be at least partially embedded on the first circuit board  23 . Those skilled in the art can understand that the connection between the electronic components  30  located on the first circuit board  23  of the receiving module  20  and the first circuit board  23  here is only an example but not a limitation. 
     The protective member  24  may be installed on the back side of the first circuit board  23 , or may be integrally formed with the first circuit board  23 . 
     It is understandable that the protective member  24  can be made of metal material, so that the TOF camera module  1  can be grounded through the protective member  24  to further provide the grounding performance of the TOF camera module  1 . Meanwhile, the protective member  24  made of metal material can also enhance the heat dissipation performance of the position, on one hand, it can help the first circuit board  23  to dissipate heat, and on the other hand, it can also help the electronic components  30  located on the front side of the first circuit board  23  or on the back side of the first circuit board  23  dissipate heat. 
     In some other examples of the present invention, the support base  50  is connected to the floodlight module  10  and the receiving module  20  by means of assembling. 
     The second circuit board  12  of the floodlight module  10  is conductively connected to the first circuit board  23  of the receiving module  20  through the conductive member  60  in the support base  50 , therefore, the at least part of the electronic components  30  located on the back side of the first circuit board  23  are conductively connected to the second circuit board  12  of the floodlight module  10  through the first circuit board  23  and the conductive member  60 . 
     In some other examples of the present invention, the protective member  24  is integrally formed on the first circuit board  23  of the receiving module  20  and is located on the back side of the first circuit board  23 . The electronic components  30  located on the first circuit board  23  of the receiving module  20  are embedded on the protective member  24  during the integral forming process of the protective member  24 . In this way, not only can the electronic components  30  be protected, but also a flat surface can be provided. The bottom side of the protective member  24  is just the bottom surface of the TOF camera module  1 , so that the bottom surface of the TOF camera module  1  formed by a molding process can be a flat surface, which is convenient for subsequent operations for the installation of the TOF camera module  1  and other devices described. 
     In this example, the receiving module  20  further includes a protective layer  25 , wherein the protective layer  25  is located in the protective cavity  240  and is formed of a protective material, the protective material may be a protective material such as glue, the protective layer  25  can seal the electronic component  30  to a certain extent, for example, to prevent the electronic component  30  from being contaminated by water or other substances, thereby affecting the normal operation of the electronic component  30 . The protective layer  25  may completely cover the electronic component  30  or may expose at least part of the electronic component  30 . 
     It is understandable that in other examples of the present invention, the support base  50  may be integrally formed on the first circuit board  23  of the receiving module  20 . 
     An embodiment of the second circuit board  12  of the floodlight module  10  is shown in  FIG. 7A . Specifically, the second circuit board  12  includes a conductive portion  121  and an insulating portion  122 , wherein the insulating portion  122  is connected to the conductive portion  121  to perform an insulating function. Optionally, the insulating portion  122  is integrally formed as the insulating portion  122 . 
     The first conductive end  1210  and the second conductive end  1220  are respectively formed on an upper surface and a lower surface of the conductive portion  121 . The second conductive end  1220  may also be formed on a side surface of the conductive portion  121 . 
     The conductive portion  121  further includes a first conductive part  1211  and a second conductive part  1212 , wherein the first conductive part  1211  and the second conductive part  1212  are isolated by the insulating portion  122  to avoid the first conductive part  1211  and the second conductive part  1212  to be short-circuited when they are simultaneously conducted. 
     The first conductive part  1211  can not only play a role of conduction, but also play a role of heat dissipation to transfer the heat generated by the light-emitting element  112  from one side of the second circuit board  12  to the other side for dissipation. Preferably, the first conductive part  1211  is larger than the second conductive part  1212 , wherein the first conductive part  1211  can be used to support the light emitting element  112 . The first conductive part  1211  can be connected to an electrode of the light emitting element  112 , and the second conductive part  1212  can be connected to another electrode of the light emitting element  112  to form a loop after being powered on. 
     Preferably, the first conductive part  1211  penetrates the insulating portion  122  in a height direction, the first conductive end  1210  is formed on an upper surface of the first conductive part  1211 , and the second conductive end  1220  is formed on a lower surface of the first conductive part  1211 . 
     It can be understood that in some other examples of the present invention, the second conductive end  1220  is formed on a sie surface of the first conductive part  1211 . 
     The conductive portion  121  may further include a third conductive part  1213  and a fourth conductive part  1214 , wherein the third conductive part  1213  and the fourth conductive part  1214  can be used to conductively support other electronic components  115 , for example, it is used to conduct components such as PD elements (light intensity detection), capacitance resistance, NTC (temperature control), etc. 
     Those skilled in the art can understand that the conductive portion  121  may also include a fifth conductive part or even more conductive parts. The structure and arrangement of the conductive portion  121  can be flexibly designed according to the requirements. 
     An embodiment of the second circuit board  12  of the floodlight module  10  is shown in  FIG. 7B , the second circuit board  12  includes a conductive layer  310 , a circuit layer  320 , and an insulating layer  330  and a heat dissipation portion  340 , wherein the insulating layer  330  is connected to the conductive layer  310  and the circuit layer  320 , respectively, and the heat dissipation portion  340  is formed on the conductive layer  310  and the circuit layer  320 . 
     Preferably, the first conductive end  1210  is formed on an upper surface of the heat dissipation portion  340 , and the second conductive end  1220  is formed on the lower surface of the heat dissipation portion  340 . The conductive layer  310  and the circuit layer  320  are respectively developed by light irradiation and then formed by electroplating. Optionally, the second conductive end  1220  may also be formed on a side surface. 
     According to another aspect of the present invention, the present invention provides a method for assembling a TOF camera module  1 , which includes the following steps: 
     providing the floodlight module  10  and the receiving module  20 ; and 
     arranging at least one electronic component  30  on a back side of the first circuit board  23  of the receiving module  20  in a manner of being electrically connected to the second circuit board  12  of the floodlight module  10 . 
     According to an embodiment of the present invention, the electronic component  30  located on the back side of the first circuit board  23  is conductively connected to the second circuit board  12  through the flexible connector  40 . 
     According to an embodiment of the present invention, the electronic component  30  located on the back side of the first circuit board  23  is conductively connected to the second circuit board  12  through the conductive member  60  located inside the support base  50 . 
     According to an embodiment of the present invention, the floodlight module  10  is directly installed on the first circuit board  23  of the receiving module  20 . 
     According to an embodiment of the present invention, wherein the floodlight module  10  is installed on the first circuit board  23  of the receiving module  20  through the supporting base  50 . 
     According to an embodiment of the present invention, the support base  50  is integrally formed on the first circuit board  23  of the floodlight module  10 . 
     According to an embodiment of the present invention, the support base  50  is integrally formed on the base  212  of the receiving module  20 . 
     According to an embodiment of the present invention, the support base  50  is integrally formed on the first circuit board  23  of the receiving module  20 . 
     Those skilled in the art should understand that the above description and the embodiments of the present invention shown in the accompanying drawings are only examples but not limitations to the present invention. The purpose of the present invention has been completely and effectively achieved. The functions and structural principles of the present invention have been shown and explained in the embodiments. Without departing from the principles, the embodiments of the present invention may have any variation or modification.