Patent Publication Number: US-10785392-B2

Title: Electronic device and camera assembly thereof

Description:
CROSS REFERENCE TO RELATED APPLICATIONS 
     This application is a continuation-application of U.S. patent application Ser. No. 16/382,771 filed on Apr. 12, 2019, which claims priorities to Chinese Patent Application No. 201810376511.1, filed on Apr. 24, 2018, the contents of which are herein incorporated by reference in their entireties. 
    
    
     TECHNICAL FIELD 
     The present disclosure relates to electronic devices, and in particular, to a camera assembly, and an electronic device including the camera assembly. 
     BACKGROUND 
     With the development of technology, portable electronic devices, such as smart phones, tablet computers, and the like, are more and more widely used. At present, a front face of a smart phone or a tablet computer generally defines a first opening for a camera assembly and a second opening for an ambient light sensor. In this way, the screen ratio of the smart phone or the tablet computer is reduced, and thus the user experience is poor. 
     SUMMARY 
     In one aspect, the present disclosure provides a camera assembly. The camera assembly may include a lens holder, a lens disposed in the lens holder, a circuit board, a camera sensor disposed on the circuit board, and an ambient light sensor electrically connected to the circuit board. The lens holder defines a light transmission channel, an inner peripheral wall is defined in the light transmission channel, and a chamfer is formed in the lens holder and disposed at one end of the inner peripheral wall that faces towards the lens. The camera sensor is disposed correspondingly to the lens via the light transmission channel. The ambient light sensor is attached to a surface of the chamfer. Ambient light is transmitted through the lens and the light transmission channel, and is further incident into the camera sensor and the ambient light sensor. 
     In a further aspect, an electronic device may be also provided. The electronic device may include a housing and the camera assembly disposed in the housing. An opening for the camera assembly is defined in the housing. The camera assembly may include a lens holder, a lens disposed in the lens holder and aligned with the opening, a circuit board, a camera sensor disposed on the circuit board, and an ambient light sensor electrically connected to the circuit board. The lens holder defines a light transmission channel, an inner peripheral wall is defined in the light transmission channel, and a chamfer is formed in the lens holder and disposed at one end of the inner peripheral wall that faces towards the lens. The camera sensor is disposed correspondingly to the lens via the light transmission channel. The ambient light sensor is attached to a surface of the chamfer. Ambient light is transmitted through the lens and the light transmission channel, and is further incident into the camera sensor and the ambient light sensor. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       In order to describe the technical solutions in the embodiments of the present disclosure more clearly, the following briefly introduces the accompanying drawings required for describing the embodiments. Apparently, the accompanying drawings in the following description are merely some embodiments of the present disclosure, for those skilled in the art; other drawings can be obtained based on these drawings without creative efforts. 
         FIG. 1  is a schematic structural view of a camera assembly according to a first embodiment of the present disclosure. 
         FIG. 2  is a partial perspective structural view of a camera sensor shown in  FIG. 1 . 
         FIG. 3  is a partial perspective structural view of a camera sensor according to a second embodiment of the present disclosure. 
         FIG. 4  is a schematic structural view of a camera assembly according to a third embodiment of the present disclosure. 
         FIG. 5  is a schematic structural view of a camera assembly according to a fourth embodiment of the present disclosure. 
         FIG. 6  is a schematic structural view of a camera assembly according to a fifth embodiment of the present disclosure. 
         FIG. 7  is a schematic structural view of a camera assembly according to a sixth embodiment of the present disclosure. 
         FIG. 8  is a schematic structural view of an electronic device according to a seventh embodiment of the present disclosure. 
     
    
    
     DETAILED DESCRIPTION 
     The technical solutions in the embodiments of the present disclosure will be clearly and completely described in detail below with reference to the accompanying drawings in the embodiments of the present disclosure. Apparently, the embodiments described herein are only some exemplary embodiments, not all the embodiments. Based on the embodiments described in the present disclosure, one skilled in the art may acquire all other embodiments without any creative efforts. All these shall be covered within the protection scope of the present disclosure. 
     In the description of the embodiments of the present disclosure, it should be understood that, it should be understood that, the orientation or positional relationship indicated by the terms “up”, “down”, “left”, “right”, and the like, is based on the orientation or positional relationship shown in the drawings, and is merely for convenience of description and for simplifying description, rather than implying or indicating that the device or the component must have a particular orientation or constructed and operated in a particular orientation, and thus these terms cannot to be construed as limiting the present disclosure. 
     In the description of the embodiments of the present disclosure, it should be understood that, the orientation or positional relationship indicated by the term “thickness” and the like is based on the orientation or positional relationship shown in the drawings, and is merely for convenience of description and for simplifying description, rather than implying or indicating that the device or the component must have a particular orientation or constructed and operated in a particular orientation, and thus these terms cannot to be construed as limiting the present disclosure. 
     In one aspect, the present disclosure provides a camera assembly. The camera assembly may include a lens holder, a lens disposed in the lens holder, a circuit board, a camera sensor disposed on the circuit board, and an ambient light sensor electrically connected to the circuit board. The lens holder defines a light transmission channel, an inner peripheral wall is defined in the light transmission channel, and a chamfer is formed in the lens holder and disposed at one end of the inner peripheral wall that faces towards the lens. The camera sensor is disposed correspondingly to the lens via the light transmission channel. The ambient light sensor is attached to a surface of the chamfer. Ambient light is transmitted through the lens and the light transmission channel, and is further incident into the camera sensor and the ambient light sensor. 
     In some embodiments, the ambient light sensor may be attached to a surface of the camera sensor that faces towards the light transmission channel. 
     In some embodiments, an insertion hole may be defined at one side of the camera sensor that faces towards the light transmission channel, and the ambient light sensor may be embedded in the insertion hole. 
     In some embodiments, the camera sensor may include a wiring layer and a plurality of photodiodes arrayed on the wiring layer. The insertion hole may be defined in the wiring layer and enclosed by the plurality of the photodiodes. 
     In some embodiments, the camera sensor may include a wiring layer and a plurality of photodiodes arrayed on the wiring layer. One of the plurality of photodiodes disposed on the wiring layer and aligned with the light transmission channel may be the ambient light sensor. 
     In some embodiments, the ambient light sensor may be disposed on a surface of the camera sensor that faces towards the lens. 
     In some embodiments, a center of the ambient light sensor may be aligned with an axis of the lens. 
     In some embodiments, the lens holder may include an inner peripheral wall forming the light transmission channel. A chamfer may be formed at one end of the inner peripheral wall that is adjacent to the lens, and the ambient light sensor may be attached to the chamfer. 
     In some embodiments, the lens holder may include an inner peripheral wall forming the light transmission channel. A stepped portion may be formed in the light transmission channel at one end of the inner peripheral wall that is adjacent to the lens, and the infrared filter may be disposed on the stepped portion. 
     In some embodiments, a receiving hole may be further defined in the stepped portion at one side that is away from the camera sensor. The ambient light sensor may be received in the receiving hole, and the ambient light may be able to be incident into the ambient light sensor. 
     In some embodiments, a through slot may be defined in the lens holder. A wire may run through the through slot, and be further electrically connected to the ambient light sensor and the circuit board. 
     In some embodiments, a receiving space may be defined at one side of the lens holder that faces towards the circuit board. The light transmission channel may extend through the lens holder and further communicates with the receiving space. 
     In some embodiments, the camera assembly may further include an infrared filter disposed on the lens holder. The ambient light may be transmitted through the infrared filter and further incident into the camera sensor and the ambient light sensor. 
     In some embodiments, the ambient light sensor is a photodiode or a photoresistor. 
     In some embodiments, the camera sensor and the ambient light sensor share an I2C bus. 
     In another aspect, a camera assembly may be further provided. The camera assembly may include a lens holder, a lens disposed in the lens holder, a circuit board, a camera sensor disposed on the circuit board, and an ambient light sensor electrically connected to the circuit board. The lens holder defines a light transmission channel. An axis of the lens may coincide with a center line of the light transmission channel and be further aligned with a center of the camera sensor. The ambient light sensor is disposed on the camera sensor or the lens holder. Ambient light is transmitted through the lens and the light transmission channel, and is further incident into the camera sensor and the ambient light sensor. 
     In some embodiments, the camera sensor may include a wiring layer and a plurality of photodiodes arrayed on the wiring layer. An insertion hole may be enclosed by the plurality of the photodiodes on the wiring layer, and the ambient light sensor may be embedded in the insertion hole. Or, one of the plurality of photodiodes disposed on the wiring layer and aligned with the light transmission channel may be the ambient light sensor. 
     In some embodiments, the lens holder may include an inner peripheral wall forming the light transmission channel. A chamfer may be formed at one end of the inner peripheral wall that is adjacent to the lens, and the ambient light sensor may be attached to the chamfer. Or, a stepped portion may be formed in the light transmission channel at one end of the inner peripheral wall that is adjacent to the lens, a receiving hole may be further defined in the stepped portion at one side that is away from the camera sensor, and the ambient light sensor may be received in the receiving hole. 
     In some embodiments, the camera assembly may further include an infrared filter disposed on the lens holder. The infrared filter may be disposed on the stepped portion and attached to the lens. 
     In a further aspect, an electronic device may be also provided. The electronic device may include a housing and the camera assembly disposed in the housing. An opening for the camera assembly is defined in the housing. The camera assembly may include a lens holder, a lens disposed in the lens holder and aligned with the opening, a circuit board, a camera sensor disposed on the circuit board, and an ambient light sensor electrically connected to the circuit board. The lens holder defines a light transmission channel, and disposed correspondingly to the lens via the light transmission channel. The ambient light sensor is disposed on the camera sensor or the lens holder. Ambient light is transmitted through the lens and the light transmission channel, and is further incident into the camera sensor and the ambient light sensor. 
     In some embodiments, the camera sensor may include a wiring layer and a plurality of photodiodes arrayed on the wiring layer. The plurality of the photodiodes may enclose an insertion hole on the wiring layer, and the ambient light sensor is embedded in the insertion hole. Or, one of the plurality of photodiodes disposed on the wiring layer and aligned with the light transmission channel may be the ambient light sensor. 
     In some embodiments, the lens holder may include an inner peripheral wall defined in or forming the light transmission channel. A chamfer may be formed at one end of the inner peripheral wall that is adjacent to the lens, and the ambient light sensor may be attached to the chamfer. Or, a stepped portion may be formed in the light transmission channel at one end of the inner peripheral wall that is adjacent to the lens, a receiving hole may be further defined in the stepped portion at one side that is away from the camera sensor, and the ambient light sensor may be received in the receiving hole. 
       FIG. 1  is a schematic structural view of a camera assembly according to a first embodiment of the present disclosure, and  FIG. 2  is a partial perspective structural view of a camera sensor shown in  FIG. 1 . In some embodiments of the present disclosure, a camera assembly  10  may be provided. The camera assembly  10  may include a lens holder  12 , a lens  14  disposed in the lens holder  12 , a circuit board  15 , a camera sensor  16  disposed on the circuit board  15 , and an ambient light sensor  17  electrically connected to the circuit board  15 . The lens holder  12  may further define a light transmission channel  121 . The camera sensor  16  may be disposed correspondingly to the lens  14  via the light transmission channel  121 . That is to say, a projection of the camera sensor  16  in the light transmission channel  121  is partially overlapped with a projection of the lens  14  in the light transmission channel  121 . The ambient light sensor  17  may be disposed inside the camera sensor  16 , and ambient light may be transmitted through the lens  14  and the light transmission channel  121 , and may be further incident into the camera sensor  16  and the ambient light sensor  17 . 
     The camera assembly  10  of the present disclosure may be mounted on any electronic device with a display screen. That is, the camera assembly  10  may be installed in smart devices, such as smart phones, tablet computers, notebook computers, in-vehicle devices, network televisions, wearable devices, and the like. In some embodiments, the camera assembly  10  may be used in a smart phone. The ambient light sensor  17  may sense ambient light around the smart phone and send a signal to a processor of the smart phone. The processor may receive the signal and control a backlight luminance of a display screen of the smart phone. In this way, it is possible to reduce the power consumption of the electronic device, and the display screen is capable of displaying a soft picture. 
     The camera sensor  16  may be a CMOS sensor. In some embodiments, the camera sensor  16  may be a back-illuminated CMOS sensor. The camera sensor  16  may detect light having a wavelength of 400-700 nm. 
     The ambient light sensor  17  may be a phototransistor, a photoresistor, or a photodiode. In some embodiments, the ambient light sensor  17  is a photodiode, and can detect light having a wavelength of 400-700 nm. 
     In some embodiments of the present disclosure, the ambient light sensor  17  may be disposed on the camera sensor  16  of the camera assembly  10 , and ambient light may be transmitted through the lens  14  and the light transmission channel  121 , and further incident into the ambient light sensor  17 . In this way, the ambient light sensor  17  may be capable of sensing the ambient light and sending the signal to the processor. The processor may further receive the signal and adjust the backlight luminance of the display screen. Since the ambient light sensor  17  is disposed on the camera sensor  16 , only one opening for the camera assembly is required to be defined in a housing of the electronic device having the camera assembly  10 . In this case, the camera sensor  16  and the ambient light sensor  17  may sense the light via the opening. That is, there is no need to define a further opening in the housing of the electronic device for the ambient light sensor  17 . In this way, the housing of the electronic device has a better integrity, and the ambient light sensor does not occupy a front face of the electronic device any more. Besides, it is beneficial to the increase of the screen ratio of the electronic device. 
     The lens holder  12  may be made of material such as rubber, plastic, and the like. A receiving space  123  may be defined at one side of the lens holder  12  that faces towards the circuit board  15 . The camera sensor  16  may be received in the receiving space  123  and electrically connected to the circuit board  15 . The light transmission channel  121  may be defined in the middle of the lens holder  12  along a direction substantially perpendicular to the camera sensor  16 . The light transmission channel  121  may extend through the receiving space  123 , and further extend to a surface of the lens holder  12  that faces away from the camera sensor  16 . That is to say, the light transmission channel  121  may extend through the lens holder  12  and further communicate with the receiving space  123 . The lens  14  may be disposed at one side of the lens holder  12  that is away from the camera sensor  16 . That is, the camera sensor  16  may be disposed at a bottom side of the lens holder  12 , and the lens  14  may be disposed at a top side of the lens holder  12 . An axis L of the lens  14  may coincide substantially with a center line of the light transmission channel  121 , and be aligned with a center of the camera sensor  16 . In some embodiments, the bottom side of the lens holder  12  may refer to the side facing away from the opening for the camera assembly, and the top side of the lens holder  12  may refer to the side facing towards the opening for the camera assembly. 
     The camera assembly  10  may further include an infrared filter  18  disposed in the lens holder  12 . The ambient light may be transmitted through the lens  14 , the light transmission channel  121 , and the infrared filter  18 , and further incident into the camera sensor  16  and the ambient light sensor  17 . 
     In this embodiment, the infrared filter  18  may be disposed at a top side of the receiving space  123  of the lens holder  12 . That is, the infrared filter  18  may be disposed on a side face of the receiving space  123  that faces towards the side of the camera sensor  16 . The infrared filter  18  and the lens  14  may cover two opposite sides of the light transmission channel  121 . The camera sensor  16  may be spaced from the infrared sensor  18 . 
     The ambient light sensor  17  may be embedded in the inner side of the camera sensor  16 , and the ambient light sensor  17  may be attached to a surface of the camera sensor  16  that faces towards the light transmission channel  121 , that is, the ambient light sensor  17  may be attached to a surface of the camera sensor  16  that faces towards the lens  14 . An insertion hole  162  may be defined at one side of the camera sensor  16  that faces towards the light transmission channel  121 . The ambient light sensor  17  may be embedded in the insertion hole  162 . In some embodiments, the insertion hole  162  may be defined in the middle of the surface of the camera sensor  16  that faces towards the light transmission channel  121 . That is, a central axis of the insertion hole  162  may be aligned with the axis L of the lens  14 . 
     In other embodiments, the central axis of the insertion hole  162  may also be offset from the axis L of the lens  14 , as long as the insertion hole  162  corresponds to the light transmission channel  121 , which means the projection of the ambient light sensor  17  on a plane substantially perpendicular to the axis L is located in the light transmission channel  121 . 
     The camera assembly  10  may further include a lens cover  19 , the lens cover  19  may cover the lens holder  12 , and may be configured to prevent dust or impurities from entering the lens  14 . A light incident hole  191  corresponding to the lens  14  may be defined in the middle of the lens cover  19 . The ambient light may be incident into the lens  14  from the light incident hole  191 . In some embodiments, the lens cover  19  may be made of transparent material. 
     As shown in  FIG. 2 , the camera sensor  16  may further include a wiring layer  163  and a plurality of photodiodes  165  arrayed on the wiring layer  163 . The insertion hole  162  may be defined in the wiring layer  163  by the plurality of the photodiodes  165 . The insertion hole  162  may be configured to receive the ambient light sensor  17 . That is to say, no photodiode  165  is disposed in a position on the wiring layer  163  that corresponds to the ambient light sensor  17 , in order to define the insertion hole  162 . The ambient light sensor  17  may be received in the insertion hole  162 . 
     In this embodiment, the camera sensor  16  and the ambient light sensor  17  may share an I2C bus. 
     When using the camera assembly  10 , the camera assembly  10  may be firstly mounted in a housing of an electronic device, and a hole corresponding to the lens of the camera assembly  10  may be defined in the housing. During the photographing, an optical image of an object to be photographed may be projected onto the camera sensor  16  via the lens  14 . The camera sensor  16  may convert the optical image into an electrical signal. The electrical signal may be further converted into a digital signal by means of analog-to-digital conversion. The digital signal may be further processed by a DSP and sent to a processor of the electronic device for processing, such that the digital signal may be converted into an image that can be seen on the display screen of the electronic device. The ambient light sensor  17  may sense the ambient light transmitted through the opening for the camera assembly, the lens  14  and the light transmission channel  121 , and further send a signal to the processor of the electronic device. The processor may receive the signal and adjust the backlight luminance of the display screen of the electronic device. 
     Since the ambient light sensor  17  is disposed on the camera sensor  16 , only one opening for the camera assembly is required to be defined in the housing of the electronic device having the camera assembly  10 , and there is no need to define another opening for the ambient light sensor. In this way, the housing of the electronic device may have a better integrity, and the production cost for defining the opening for the ambient light sensor may be saved. Besides, the ambient light sensor does not occupy the inner space of the housing of the electronic device, which facilitates the arrangement of electronic components in the housing. Further, it is beneficial to the increase of the screen ratio of the electronic device. 
       FIG. 3  is a partial perspective structural view of a camera sensor according to a second embodiment of the present disclosure. As shown in  FIG. 3 , the structure of the camera sensor in the second embodiment of the present disclosure is similar to that of the camera sensor in the first embodiment, except that in the second embodiment, one of the plurality of photodiodes disposed on the wiring layer  163  and aligned with the light transmission channel  121  in the first embodiment may be set as the ambient light sensor  17   a.  That is, during the design and manufacturing of the camera sensor  16   a,  one of the plurality of photodiodes of the camera sensor  16  may be set as the ambient light sensor. When using the camera assembly, the ambient light may be transmitted through the lens  14 , the light transmission channel  121 , and the infrared filter  18 , and further incident into the camera sensor  16 . One of the plurality of photodiodes may sense the ambient light. That is to say, the ambient light sensor  17   a  may sense the ambient light, and further send the signal to the processor of the electronic device. The process may further receive the signal and adjust the backlight luminance of the display. Other photodiodes on the camera sensor  16  may be configured for photographing. 
       FIG. 4  is a schematic structural view of a camera assembly according to a third embodiment of the present disclosure. As shown in  FIG. 4 , the structure of the camera assembly in the third embodiment of the present disclosure is similar to that of the camera assembly in the first embodiment, except that in the third embodiment, the ambient light sensor  17  of the camera assembly  10   a  may be disposed on the surface of the camera sensor  16  that faces towards the light transmission channel  121  or the lens  14 . A center of the ambient light sensor  17  may be aligned with the axis L of the lens  14 . The ambient light sensor  17  may be electrically connected to the circuit board  15 . 
       FIG. 5  is a schematic structural view of a camera assembly according to a fourth embodiment of the present disclosure. As shown in  FIG. 5 , the structure of the camera assembly in the fourth embodiment of the present disclosure is similar to that of the camera assembly in the third embodiment, except that in the fourth embodiment, the ambient light sensor  17  of the camera assembly  10   b  may be disposed on the surface of the camera sensor  16  that faces towards the light transmission channel  121 , but the ambient light sensor  17  may be offset from the axis L of the lens  14 , as long as the ambient light sensor  17  corresponds to the light transmission channel  121 , which means the projection of the ambient light sensor  17  on a plane substantially perpendicular to the axis L is located in the light transmission channel  121 . 
       FIG. 6  is a schematic structural view of a camera assembly according to a fifth embodiment of the present disclosure. As shown in  FIG. 6 , the structure of the camera assembly in the fifth embodiment of the present disclosure is similar to that of the camera assembly in the first embodiment, except that in the fifth embodiment, a receiving hole  124  adjacent to the light transmission channel  121  may be further defined in the lens holder  12  of the camera assembly  10   c.  The ambient light sensor  17  may be received in the receiving hole  124 . The ambient light may be transmitted through the lens  14 , and further incident into the ambient light sensor  17 . A mounting space  125  may be further defined in the middle at a side face of the lens holder  12  that faces away from the camera sensor  16 . The mounting space  125  may communicate with the light transmission channel  121 , and the lens  14  may be received in the mounting space  125 . A stepped portion  126  may be formed in the light transmission channel  12  of the lens holder  12  and between the mounting space  125  and the receiving space  123 . 
     More specifically, the lens holder  12  may include an inner peripheral wall  121   a  defined in (also forming) the light transmission channel  121 . The stepped portion  126  may be formed in the light transmission channel  12  of the lens holder  12  at one end of the inner peripheral wall  121   a  that is adjacent to the lens  14 . In this embodiment, the receiving hole  124  may be defined at the side of the stepped portion  126  that faces away from the camera sensor  16 . The receiving hole  124  may be disposed adjacent to the light transmission channel  121 , and the ambient light sensor  17  may be received in the receiving hole  124 . That is to say, the ambient light sensor  17  may be disposed in the stepped portion  126 . 
     The infrared filter  18  may be further disposed on the stepped portion  126 , and attached to the lens  14 . The infrared filter  18  may cover the ambient light sensor  17 , and the lens  14  may be disposed on the infrared filter  18 . 
     In other embodiments, the receiving hole  124  may also be defined at one side of the stepped portion  126  that faces away from the camera sensor . 16  and further disposed away from the light transmission channel  121 , as long as the ambient light is capable of being transmitted through the lens  14  and the infrared filter  18 , and further incident into the ambient light sensor  17  received in the receiving hole  124 . 
     A through slot  127  may be defined in the lens holder  12 , and the through slot  127  may communicate with the receiving hole  124  and the receiving space  123 . The ambient light sensor  17  may be electrically connected to the circuit board  15  via a wire running through the through slot  127 . 
     When using the camera assembly, the camera assembly  10   c  is mounted on the electronic device. The ambient light may be transmitted through the opening for the camera assembly, the lens  14 , and the infrared filter  18 , and further incident into the ambient light sensor  17 . The ambient light sensor  17  may sense the ambient light, and further send the signal to the processor of the electronic device. The process may further receive the signal and control the backlight luminance of the display screen of the electronic device. In this way, it is possible to reduce the power consumption of the electronic device, and the display screen is capable of displaying a soft picture. 
     Since the ambient light sensor  17  of the camera assembly  10   c  of the present disclosure is disposed on the stepped portion  126  of the lens holder  12 , it is convenient for the ambient light sensor  17  to sense the ambient light outside the camera assembly  10   c.  Moreover, the ambient light sensor  17  will not block the camera sensor  16 , which facilitates the photographing of the camera assembly  10   c.    
       FIG. 7  is a schematic structural view of a camera assembly according to a sixth embodiment of the present disclosure. As shown in  FIG. 7 , the structure of the camera assembly in the sixth embodiment of the present disclosure is similar to that of the camera assembly in the fifth embodiment, except that in the sixth embodiment, in the lens holder  12  of the camera assembly  10   d,  a chamfer  128  may be formed in the lens holder  12  and disposed at one end of the inner peripheral wall  121   a  that faces towards the lens  14  (also adjacent to the lens  14 ). The ambient light sensor  17  may be attached to a surface of the chamfer  128 . That is to say, the chamfer  128  may be formed at the junction between the side face of the stepped portion  126  that faces towards the lens  14  and the inner peripheral wall  121   a  of the light transmission channel  121 , and the ambient light sensor  17  may be attached to the surface of the chamfer  128 . The through slot  127  may be defined in the lens holder  12 . In this case, the through slot  127  may communicate with the receiving space  123 , and further extend to the surface of the chamfer  128 . The ambient light sensor  17  may be electrically connected to the circuit board  15  via a wire running through the through slot  127 . 
     When using the camera assembly  10 , the camera assembly  10   d  is mounted in an electronic device. The ambient light may be transmitted through the opening for the camera assembly, the lens  14 , and the infrared filter  18 , and further incident into the ambient light sensor  17 . The ambient light sensor  17  may sense the ambient light, and further send the signal to the processor of the electronic device. The process may further receive the signal and control the backlight luminance of the display screen of the electronic device. In this way, it is possible to reduce the power consumption of the electronic device, and the display screen is capable of displaying a soft picture. 
     Since the ambient light sensor  17  of the camera assembly  10   d  of the present disclosure is disposed on the chamfer  128  of the stepped portion  126  of the lens holder  12 , the ambient light sensor  17  can sense more ambient light outside the camera assembly  10   c.  Moreover, the ambient light sensor  17  will not block the camera sensor  16 , which facilitates the photographing of the camera assembly  10   c.    
     In other embodiments, a notch may be defined at the junction between the side face of the stepped portion  126  that faces towards the lens  14  and the inner peripheral wall  121   a  of the light transmission channel  121 . The ambient light sensor  17  may be received in the notch. The ambient light may be transmitted through the opening for the camera assembly, the lens  14 , and the infrared filter  18 , and further incident into the ambient light sensor  17 . 
       FIG. 8  is a schematic structural view of an electronic device according to a seventh embodiment of the present disclosure. As shown in  FIG. 8 , the electronic device  100  may include a housing  30 , a screen  40  disposed on a front face of the housing  30 , a main board  50  disposed in the housing  30 , and the camera assembly  10  described in any embodiment above. An opening  302  for the camera may be defined at the top of the display screen  40  on the front face of the housing  30 . The camera assembly  10  may be mounted in the housing  30 . The lens of the camera assembly  10  may be aligned with the opening  302 . The circuit board of the camera assembly  10  may be electrically connected to the main board  50 . 
     In this embodiment, the electronic device  100  may be a smart phone, and the camera component  10  may be a front camera of the smart phone. 
     When using the electronic device  100 , the ambient light around the electronic device  100  may be transmitted through the opening  302 , the lens, the infrared filter, and the light transmission channel, and further incident into the ambient light sensor. The ambient light sensor may sense ambient light and further send a signal to a processor on the main board  50 . The processor may receive the signal and adjust the backlight luminance of the display screen  40 . In this way, it is possible to reduce the power consumption of the electronic device  100 , and the display screen  40  is capable of displaying a soft picture. 
     When it is required to use the electronic device  100  to photograph, an optical image of an object to be photographed may be projected onto the camera sensor via the lens of the camera assembly  10 . The camera sensor may convert the optical image into an electrical signal. The electrical signal may be further converted into a digital signal by means of analog-to-digital conversion. The digital signal may be further processed by the DSP, and then sent to the processor on the main board  50  for processing, such that the digital signal may be converted into the image that can be seen on the display screen of the electronic device  100 . 
     Since the front face of the housing  30  defines only the opening  302  for the camera, and the ambient light sensor is integrated into the camera assembly  10 , it is possible that the housing  30  has a better integrity, and the production cost for defining the opening for the ambient light sensor may be saved. Besides, the ambient light sensor does not occupy the inner space of the housing  30  of the electronic device, which facilitates the arrangement of electronic components in the housing. Further, it is also possible to increase the screen ratio of the electronic device  100 . 
     In other embodiments, the camera assembly  10   a,    10   b,    10   c  or  10   d  may be mounted in the housing  30 . 
     The above is an embodiment of the present disclosure. It should be noted that, those skilled in the art can also make several improvements and modifications without departing from the principles of the present disclosure. All these shall be covered within the protection scope of the present disclosure.