WO2019075700A1

WO2019075700A1 - Camera module and mobile terminal

Info

Publication number: WO2019075700A1
Application number: PCT/CN2017/106922
Authority: WO
Inventors: 薛群; 龙浩晖; 方建平; 刘泰响
Original assignee: 华为技术有限公司
Priority date: 2017-10-19
Filing date: 2017-10-19
Publication date: 2019-04-25
Also published as: CN110199514A

Abstract

Embodiments of the present application relate to the technical field of cameras. Provided are a camera module and a mobile terminal. The camera module comprises a voice coil motor and a filter support that are sequentially disposed in an incident direction of light. The voice coil motor comprises a motor housing and a motor body disposed in the motor housing. A gap is formed between the motor body and the motor housing. The motor body is provided with a center hole. A camera is disposed in the center hole. A filter mounting groove and a dustproof groove are disposed on a surface of the filter support facing to the voice coil motor. An infrared filter is disposed in the filter mounting groove. The camera and the infrared filter are sequentially arranged in the incident direction of light. The dustproof groove is located on one side of the filter mounting groove distant from an optical axis of the camera module, and in the incident direction of light, the dustproof groove is opposite to an opening of the gap facing to the filter support.

Description

Camera module and mobile terminal

Technical field

The present application relates to the field of camera technologies, and in particular, to a camera module and a mobile terminal.

Background technique

With the continuous development of mobile terminal technology, the shooting function of the mobile terminal has become an indispensable additional function. As an electronic device for image capture, the camera module is an indispensable component for the mobile terminal to realize the shooting function, and has a direct impact on the shooting effect of the mobile terminal.

As shown in FIG. 1 , the camera module mainly includes: a lens 01, a voice coil motor (VCM) 02, an infrared filter (IR-Filter) 03, and an optical sensor. 04, Printed Circuit Board (PCB) 05, flexible printed circuit (FPC) 06, Infrared Radiation holder (IR holder) 07, and Board To Board (BTB) Connector 08.

The filter holder 07 is used to support the infrared filter 03 and the voice coil motor 02. As shown in FIG. 2, the voice coil motor 02 includes a motor housing 021 and a motor body 022 disposed in the motor housing 021. The motor body 022 and the motor housing 021 are elastically connected by a reed, and the lens 01 is disposed on the motor body 022. In the center hole, the lens 01 and the infrared filter 03 are sequentially arranged along the incident direction 013 of the light, and the dotted line in FIG. 2 shows the approximate position of the optical axis 012 of the camera module. Since the motor body 022 needs to move relative to the motor housing 021, a gap 09 is left between the motor body 022 and the motor housing 021. During the assembly process of the camera, dirt and dust may be generated in the process or incoming materials. During use, the motor body and the motor casing may generate debris due to collision during the movement. These foreign objects (Particle) 010 may be caused by The gap 09 between the motor body 022 and the motor housing 021 falls to the infrared filter 03 of the camera module (the double-dotted line in Fig. 2 shows the falling path of the foreign matter 010), thereby causing a black shadow on the picture when taking a picture. (as shown in the dotted circle in Figure 3), affecting the picture effect. Moreover, during use, the motor body and the motor casing may drop debris during the movement.

Moreover, the black shadow phenomenon of the mobile phone using the dual camera is more obvious. As the image resolution of the dual camera synthesis is greatly improved, the foreign matter 010 is more and more easy to image on the infrared filter 03, and the tolerance of the foreign object of the dual camera is only about 20 um. That is to say, a foreign object of about 20um can cause a black shadow phenomenon. Compared with a single camera pixel foreign object tolerance of 40um, the requirements are more stringent, and it is difficult to achieve a quality target by simple process control, if the dust generation scheme is avoided. Preventing shadows can lead to increased production costs.

Summary of the invention

The embodiment of the present application provides a camera module and a mobile terminal, which can prevent foreign matter from falling onto the infrared filter of the camera module, thereby avoiding a black shadow phenomenon.

To achieve the above objective, the embodiment of the present application adopts the following technical solutions:

In a first aspect, the application provides a camera module, including:

a voice coil motor and a filter holder disposed in sequence along an incident direction of the light, the voice coil motor includes a motor housing and a motor body disposed in the motor housing, the motor body and the motor housing have a gap therebetween, and the motor body has a middle The core hole is provided with a lens in the center hole, and the filter holder is provided with a filter mounting groove and a dustproof groove on the surface of the voice coil motor, and an infrared filter is arranged in the filter mounting groove, and the lens and the infrared filter are arranged along the light. The incident directions are sequentially arranged, and the dustproof groove is located on a side of the filter mounting groove away from the optical axis of the camera module, and the dustproof groove is opposed to the opening of the filter holder in the incident direction of the light.

The camera module provided in the embodiment of the present invention has a dustproof groove formed on the surface of the filter holder facing the voice coil motor, and the dustproof groove is opposite to the opening of the filter holder in the incident direction of the light. The foreign matter entering through the gap will fall into the dustproof groove, so that the foreign matter can be prevented from falling onto the infrared filter, and the dustproof groove can be directly formed on the filter holder to avoid adding new components, thereby simplifying the installation process. And save installation space.

In a possible implementation manner, the dustproof groove is provided with dustproof glue, and the foreign matter falling into the dustproof groove is adhered by the dustproof glue, and even if the camera module is shaken, the foreign matter does not move, thereby making the dustproof The effect is better.

In a possible implementation manner, the bottom surface of the dustproof groove is a sloped surface, and the bottom surface is inclined downward from a side of the optical axis of the camera module. Thereby, the foreign matter can be slid toward the side away from the optical axis of the camera module after falling into the dustproof groove, thereby making the dustproof effect more reliable.

In a possible implementation manner, the dustproof slot includes a first sidewall that is away from the optical axis of the camera module. The bottom surface of the dustproof slot is away from the optical axis of the camera module and is connected to the lower edge of the first sidewall. The bottom surface of the groove is adjacent to one side of the optical axis of the camera module and is connected to the upper edge of the side wall of the filter mounting groove. Therefore, the filter holder removes less material, can ensure the strength of the filter holder, and only needs to make the first side wall and the inclined bottom surface to form a dustproof groove, thereby facilitating processing.

In a possible implementation manner, when the opening of the dustproof groove is substantially in the same plane as the opening of the filter mounting groove, the angle between the bottom surface of the dustproof groove and the horizontal plane is 3° to 5°. Thereby, the thickness of the filter holder can be ensured, so that the filter holder is not easily deformed.

In a possible implementation, only the bottom surface of the dustproof groove is covered with dustproof glue. Thereby, foreign matter that has fallen into the bottom surface of the dustproof groove can be adhered to prevent entry into the filter mounting groove during shaking.

In a possible implementation manner, the bottom surface of the dustproof groove and the first side wall are covered with dustproof glue. Thereby, the area of the dustproofing glue can be made larger, so that more or larger foreign matter can be stuck.

In a possible implementation manner, the first sidewall is recessed in a direction away from the optical axis of the camera module to form a concave curved surface. Thereby, the first side wall of the curved surface structure can correspond to the annular gap shape.

In another possible implementation manner, the bottom surface of the dustproof slot is disposed in a direction perpendicular to the optical axis of the camera module, and the dustproof groove includes a second sidewall adjacent to the optical axis of the camera module and light away from the camera module. The third side wall of the shaft, the opposite sides of the bottom surface of the dustproof groove are respectively connected to the lower edge of the second side wall and the lower edge of the third side wall.

In a possible implementation manner, the bottom surface of the dustproof groove is covered with dustproof glue. Thereby, foreign matter that has fallen into the bottom surface of the dustproof groove can be adhered to prevent entry into the filter mounting groove during shaking.

In a possible implementation manner, the bottom surface, the second sidewall, and the third sidewall of the dustproof slot are covered with dustproof glue. Thereby, the area of the dustproofing glue can be made larger, so that more or larger foreign matter can be stuck.

In a possible implementation manner, when the opening of the dustproof groove is substantially in the same plane as the opening of the filter mounting groove, the depth of the dustproof groove may be substantially set to 0.05 to 0.1 mm. Thereby, the depth of the dustproof groove can be kept within a reasonable range, which can not only play the role of dustproof, but also can prevent the strength of the filter holder from being excessively reduced.

In a possible implementation, the dust slot is placed around the circumference of the filter mounting slot. Thus, the filter can be The mounting groove is dust-proof for one week, preventing foreign matter from falling into the filter mounting groove from any position of the gap.

In a possible implementation, the dustproof slot includes a first dustproof slot and a second dustproof slot, and the first dustproof slot and the second dustproof slot are respectively disposed on opposite sides of the filter mounting slot. Thereby, in the case where the installation space is insufficient, the dust groove can be provided only on the opposite sides of the filter mounting groove.

In a possible implementation, the dustproof glue may be glue or double-sided tape.

In a possible implementation, a light sensor is further included, and the light sensor is disposed on a side of the infrared filter away from the lens. The light sensor is used to convert the optical image into a digital signal and transmit it to the mobile terminal through the flexible circuit board.

In a possible implementation, the surface of the filter holder away from the voice coil motor is provided with a light sensor receiving cavity, and the light sensor is disposed in the light sensor receiving cavity. Thereby, the installation space of the photosensor can be saved, which is advantageous for reducing the thickness of the whole machine.

In a possible implementation, the protection mirror is further disposed at an end of the voice coil motor away from the filter holder, and the protection mirror blocks the central hole of the motor body. Thereby, external dust or moisture can be prevented from entering

In a second aspect, the present application provides a mobile terminal, including a motherboard and a camera module of any of the foregoing technical solutions, wherein the camera module is electrically connected to the motherboard.

The mobile terminal provided by the embodiment of the present invention has a dustproof groove formed on the surface of the filter holder in the camera module facing the voice coil motor, and the dustproof groove faces the filter holder in the incident direction of the light and the gap. The openings are opposite. Therefore, the foreign matter entering through the gap will fall into the dustproof groove, so that the foreign matter can be prevented from falling onto the infrared filter and the dust groove can be directly formed on the filter holder to avoid adding new components. Simplify the installation process and save installation space, which is beneficial to reduce the thickness of the mobile terminal.

In a possible implementation manner of the second aspect, the mobile terminal further includes a back cover, and the back cover is provided with a avoidance hole corresponding to the position of the lens in the camera module.

In a possible implementation manner of the second aspect, the camera module is two groups, and the two camera modules are disposed side by side and electrically connected to the main board respectively. Thereby, dual lens shooting can be achieved.

In a possible implementation manner of the second aspect, the camera module and the main board are electrically connected through the flexible circuit board.

DRAWINGS

1 is a schematic structural view of a camera module;

2 is a schematic view showing the internal structure of a camera module;

Figure 3 is a schematic view of a black shadow phenomenon;

4 is a schematic structural view of another camera module;

FIG. 5 is a schematic structural diagram of a camera module according to an embodiment of the present application; FIG.

Figure 6 is an enlarged view of a portion A of Figure 5;

Figure 7 is an enlarged view of a portion A marked with a size specification;

FIG. 8 is a schematic structural diagram of a camera module according to another embodiment of the present application; FIG.

9 is a view of the filter holder in the camera module of the embodiment of the present invention as viewed in the incident direction of the light;

10 is a schematic structural view of a bottom surface of a dustproof slot of a camera module according to an embodiment of the present invention;

Figure 11 is an enlarged view of a portion B of Figure 10;

12 is a view of another filter holder in the camera module of the embodiment of the present invention as viewed in the incident direction of the light;

13 is a schematic structural view of a camera module of a dual lens structure;

FIG. 14 is a schematic structural diagram of a mobile terminal according to an embodiment of the present application;

FIG. 15 is a schematic diagram showing the partial structure of the back side of the mobile terminal when the rear case is removed according to the embodiment of the present application.

Detailed ways

The embodiment of the present invention relates to a camera module of a mobile terminal, wherein the camera module may include a lens, a voice coil motor (VCM), an infrared filter (IR-Filter), and an optical sensor. (sensor), printed circuit board (PCB), flexible printed circuit (FPC), and infrared holder (IR holder).

The following components are briefly described below:

Lens: The lens plays an important role in the effect of imaging. It uses the refraction principle of the lens to make the scene light pass through the lens and form a clear image on the focal plane.

Infrared filter: Also known as infrared cut filter or endothermic filter, it is a filter used to filter the infrared band, which can prevent infrared rays from passing through the lens of the camera and causing picture distortion.

Voice coil motor: Also called voice coil motor, it is used to drive the movement of the lens. The voice coil motor can adjust the position of the lens to realize the auto focus function and present a clear image.

Light sensor: Also known as an image light sensor, it is used to convert optical images into digital signals.

Printed circuit board: also known as printed circuit board, is the support body of each electronic component in the camera module and the carrier of electrical connection.

Flexible circuit board: A flexible printed circuit board. The printed circuit board used to connect the camera module and the main board of the mobile phone serve as electrical signal transmission.

Filter holder: used to support the fixed infrared filter.

Those skilled in the art can understand that the structure of the above camera module does not constitute a limitation of the camera module, and may include more or less components than the above, or combine some components, or split some components, or different. Parts layout. For example, the infrared filter can be omitted or replaced with other optical components such as other filters or diffusers.

4 is a schematic structural view of a camera module. Referring to FIG. 4, the camera module includes a lens 01, a voice coil motor 02, an infrared filter 03, and a filter holder 07. The filter holder 07 is used to support the infrared filter 03 and the voice coil motor 02. The voice coil motor 02 includes a motor housing 021. And a motor body 022 disposed in the motor housing 021, the lens 01 is disposed in the center hole of the motor body 022, and the lens 01 and the infrared filter 03 are sequentially arranged along the incident direction 013 of the light, as indicated by the dotted line in FIG. It is the approximate position of the optical axis 012 of the camera module. The lens hole 01 and the center hole of the motor body 022 may be connected by screwing or by adhesive bonding, and the motor body 022 and the motor housing 021 are elastically connected (for example, by elastic members such as reeds), between the motor body 022 and the motor housing 021. With a gap 09, a dustproof ring 011 is arranged above the filter holder 07, and the dustproof ring 011 can be fixed to the lower end of the voice coil motor 02. The dustproof ring 011 is provided with a dustproof groove 0111 corresponding to the gap 09, and enters by the gap 09. The foreign matter 010 will fall into the dustproof groove 0111, and the dustproof groove 0111 can block the foreign matter 010 from directly falling on the infrared filter 03. However, the applicant found that the dustproof groove 0111 in the solution can only temporarily block the foreign matter 010. When the camera is shaken or vibrated, the foreign matter 010 still falls on the infrared filter due to the gap between the dustproof ring 011 and the motor body 022. The risk (the double-dotted line in Figure 4 is the drop path of the foreign object 010). Moreover, since the dust-proof ring 011 is added, it takes up a certain space, and when the size of other components is constant, the thickness of the whole machine is increased, the product cost is increased, and the assembly process is complicated.

To solve the above problem, the embodiment of the present application provides a structural design scheme of a camera module. It should be noted that, in the drawings of the embodiments of the present invention, the optical axis of the optical camera module and the direction of the incident light are indicated (ie, the direction in which the external light is incident on the photosensor), and the “upward” and “upper side” of the present application. "Reverse to the direction of the incident light, "downward" and "lower" mean the direction of the incident light, and "horizontal" means parallel to the direction of the incident light. The direction of the incident light parallel to the direction of the optical axis in the drawing is an example. As a reference to the orientation of the embodiment, the external light can also enter the camera module from other directions, which is not limited in the present invention.

In order to avoid adding new components, as shown in FIG. 5 and FIG. 6, the camera module of the embodiment of the present application includes a voice coil motor 2 and a filter holder 4, which are sequentially disposed along the incident direction 8 of the light, and a voice coil motor. 2 includes a motor casing 21 and a motor body 22 disposed in the motor casing 21. The motor body 22 and the motor casing 21 have a gap 23 therebetween. The motor body 22 has a center hole. The lens hole 1 is disposed in the center hole, and the filter holder 4 is oriented. A filter mounting slot 41 and a dustproof slot 43 for fixing the filter 3 are disposed on the surface 42 of the voice coil motor 2, and an infrared filter 3 is disposed in the filter mounting slot 41, and the lens 1 and the infrared filter 3 are along the light. The incident direction 8 is sequentially arranged, and the dustproof groove 43 is located on the side of the filter mounting groove 41 away from the optical axis 7 of the camera module, and the dustproof groove 43 faces the gap 23 toward the filter holder 4 in the incident direction 8 of the light. The openings (i.e., the lower openings of the gaps 23 in Fig. 5) are opposed.

The camera module provided in the embodiment of the present invention has a dustproof groove 43 formed on the surface of the filter holder 4 facing the voice coil motor 2, and the dustproof groove 43 is opposite to the lower opening of the gap 23 in the incident direction 8 of light. Therefore, the foreign matter entering by the gap 23 falls into the dustproof groove 43, so that the foreign matter can be prevented from falling onto the infrared filter 3. At the same time, the dust-proof groove 43 is directly formed on the filter holder 4 to avoid adding new components, thereby simplifying the installation process and saving installation space.

It should be noted that the above-mentioned foreign matter may be an object which can affect the imaging such as dirt, dust, debris, etc., and causes a black shadow when photographing. The surface of the filter holder 4 facing the voice coil motor 2 may be a horizontal surface, a curved surface or a step surface. The surface may be set according to the shape of the filter holder and the position and size of the filter mounting slot, which is not limited herein.

In order to prevent foreign matter in the dust-proof groove from falling onto the infrared filter again, dust can be added to all or part of the dust-proof groove. Therefore, foreign matter falling into the dust-proof groove can be dust-proof and glued. Live, even if the camera module is shaken, foreign objects will not move, which makes the dustproof effect better. As an example, the dustproof glue can be added to the dustproof groove 0111 of the dustproof ring 011. The dustproof glue 44 can be disposed in the dustproof groove 43 by taking the scheme of FIG. 5 and FIG. 6 as an example.

It should be noted that, in the solution of FIG. 4, even if the dust ring 011 is not provided, and in the solution of FIG. 5, even if the filter holder 4 does not open the dust groove 43, the incident direction of the light on the filter holder can be The dustproof glue is directly disposed at a position opposite to the lower opening of the gap, and the solution can also adhere to the foreign matter and prevent foreign matter from falling onto the infrared filter. Therefore, the dust-proof glue and the dust-proof groove can be used separately or in combination, and are not limited herein.

The bottom surface 431 of the dustproof groove 43 can be designed as a slope, a horizontal surface, a curved surface, or the like.

When the bottom surface 431 of the dustproof groove 43 is designed as a slope, the inclination direction thereof may have various options, for example, it may be gradually inclined downward in the direction of the optical axis 7 close to the camera module, or may be along the light away from the camera module. The direction of the shaft 7 is gradually inclined downward. In order to make the dustproof effect more reliable, as shown in FIG. 6, the bottom surface 431 of the dustproof groove 43 can be designed to be gradually inclined downward in a direction away from the optical axis 7 of the camera module. Thereby, the foreign matter can be slid toward the side away from the optical axis 7 of the camera module after falling into the dustproof groove 43, so that the dustproof effect is more reliable.

Optionally, the cross-sectional structure of the dust-proof groove 43 can be in various forms. As shown in FIG. 8 , the dust-proof groove 43 can include a bottom surface and two side walls. As shown in FIG. 5 and FIG. It may also include only one bottom surface 431 and one side wall, that is, the bottom surface 431 and the first side wall 432 away from the optical axis 7 of the camera module. The bottom surface 431 of the dustproof groove 43 is away from the side of the optical axis 7 of the camera module. The lower edge of one side wall 432 is connected, and the bottom surface 431 of the dustproof groove 43 is adjacent to the side edge of the side wall of the filter mounting groove 41 near one side of the optical axis 7 of the camera module. Thereby, the filter holder 4 removes less material, and the strength of the filter holder 4 can be ensured, and only the first side wall 432 and the inclined bottom surface 431 need to be formed to form the dustproof groove 43, thereby facilitating processing. It can be understood that the "bottom surface" and "side wall" of the dust-proof slot in the embodiment of the present invention are only for convenience, and the two can directly transition smoothly without obvious boundaries.

Since the filter holder 4 needs to support the filter, the filter holder 4 is required to have sufficient strength. If the strength is too low, the filter holder 4 is deformed, thereby affecting the positional accuracy of the filter. Therefore, the inclination angle of the bottom surface 431 of the dustproof groove 43 should be selected within a suitable range. Specifically, when the plane of the opening of the dustproof groove 43 is higher than the plane in which the opening of the filter mounting groove 41 is located, the depth of the dustproof groove 43 may be set deeper. As shown in FIG. 7, when the opening of the dustproof groove 43 is substantially flush with the opening of the filter mounting groove 41, the depth w of the dustproof groove 43 can be set to approximately 0.05 to 0.1 mm. Thereby, the depth of the dustproof groove 43 can be kept within a reasonable range, and the dustproof effect can be exerted, and the strength of the filter holder 4 can be prevented from being excessively reduced. The depth of the dustproof groove 43 refers to the distance from the upper edge of the dustproof groove to the optical axis side of the camera module to the lowest point of the dustproof groove.

When the bottom surface 431 of the dustproof groove 43 is a sloped surface, the depth of the dustproof groove 43 can be restricted by limiting the angle θ between the bottom surface 431 of the dustproof groove 43 and the horizontal plane. Specifically, as shown in FIG. 7, the bottom surface 431 and the horizontal surface are as shown in FIG. The angle θ can be set to approximately 3° to 5°. When the tilt angle is selected within this range, the thickness of the filter holder 4 is not reduced too much, thereby ensuring the strength of the filter holder 4 and filtering. The sheet holder 4 is not easily deformed, and can effectively block foreign matter formation. Of course, the range of values of θ in the embodiment of the present application is not limited thereto.

The dustproof adhesive 44 may be disposed only on the bottom surface 431 of the dustproof groove 43, and the dustproof adhesive 44 may be disposed on the bottom surface 431 of the dustproof groove 43 and the first side wall 432. When the dustproof adhesive 44 is covered only on the bottom surface 431 of the dustproof groove 43, the process of covering the dustproof adhesive 44 can be simplified. When the dustproof adhesive 44 is covered on the bottom surface 431 of the dustproof groove 43 and the first side wall 432, the area of the dustproof adhesive 44 can be made larger, so that more or larger foreign matter can be adhered.

The first side wall 432 may be a flat surface, or as shown in FIG. 9, the first side wall 432 may be disposed as a concave curved surface that is recessed away from the optical axis 7 of the camera module, since the motor body 22 is generally circular. Therefore, the gap 23 between the motor body 22 and the motor casing 21 is also a substantially annular gap 23, and the first side wall 432 is provided as a concave curved surface, which is open to the shape of the lower end of the annular gap 23. More closely, the two-dot chain line in FIG. 9 shows the approximate position of the lower end opening of the gap 23 projected on the filter holder 4. Therefore, the dust-proof dead angle can be avoided, and the dustproof effect is better.

As shown in FIG. 10 and FIG. 11, when the bottom surface 431 of the dustproof groove 43 is disposed in a direction perpendicular to the optical axis 7 of the camera module, the dustproof groove 43 includes a second side wall of the optical axis 7 adjacent to the camera module. 433 and the third side wall 434 of the optical axis 7 away from the camera module, the opposite sides of the bottom surface 431 of the dustproof groove 43 are respectively connected to the lower edge of the second side wall 433 and the lower edge of the third side wall 434. The dustproof groove 43 of this structure has a large volume and can accommodate more foreign matter.

Similarly, the dustproof adhesive 44 may be disposed only on the bottom surface 431 of the dustproof groove 43, or may be on the bottom surface of the dustproof groove 43. The dustproof adhesive 44 is disposed on the second side wall 433 and the third side wall 434. When the dustproof adhesive 44 is covered only on the bottom surface 431 of the dustproof groove 43, the process of covering the dustproof adhesive 44 can be simplified. When the bottom surface 431, the second side wall 433, and the third side wall 434 of the dustproof groove 43 are covered with the dustproof adhesive 44, the area of the dustproof adhesive 44 can be made larger, so that more or larger can be adhered. foreign matter.

In the case where the filter holder 4 is allowed to face the surface space of the voice coil motor 2, as shown in FIG. 12, the dustproof groove 43 can be disposed around the circumference of the filter mounting groove 41. The two-dot chain line in Fig. 12 shows the approximate position at which the lower end opening of the gap 23 is projected on the filter holder 4. Thereby, the dustproof effect can be achieved for one week of the filter mounting groove 41, and foreign matter can be prevented from falling into the filter mounting groove 41 from any position of the gap 23.

When the space of the filter holder 4 facing the surface of the voice coil motor 2 is insufficient to provide the entire circumference of the dustproof groove 43, the dustproof groove 43 can be provided only at a position where the space is sufficient. As shown in FIG. 9, the dustproof groove 43 includes a first dustproof groove 43a and a second dustproof groove 43b. The first dustproof groove 43a and the second dustproof groove 43b are respectively disposed on opposite sides of the filter mounting groove 41. . Thereby, a certain dustproof effect can be achieved in the case where the space is insufficient.

The dust-proof glue 44 may be a liquid glue or a solid double-sided tape, or may be a semi-solid glue, which is not limited herein.

As shown in FIG. 10, the camera module further includes a light sensor 5 disposed on a side of the infrared filter 3 away from the lens 1. The light sensor 5 is used to convert an optical image into a digital signal and transmit it to the mobile terminal through a flexible circuit board.

In order to save the installation space, as shown in FIG. 10, the surface of the filter holder 4 away from the voice coil motor 45 is provided with a photosensor accommodating chamber 451, and the photo sensor 5 is disposed in the photosensor accommodating chamber 451. Thereby, the installation space of the photosensor 5 can be saved, which is advantageous for reducing the thickness of the whole machine.

As shown in FIG. 10, the camera module further includes a PCB board 6, which is a carrier for electrically connecting the electronic components in the camera module.

In order to effectively protect the lens 1, the camera module further includes a protective mirror disposed at one end of the voice coil motor 2 away from the filter holder 4, that is, along the incident direction of the light 8, the protective mirror, the voice coil motor 2, and the filter. The sheet holders 4 are sequentially disposed.

And the protection mirror blocks the center hole of the motor body 22. Thereby, external dust or moisture can be prevented from entering the lens 1.

It should be noted that the above embodiments are all described by the camera module of the single lens 1. However, the camera module of the embodiment of the present application is not limited to the structure of the single lens 1, and can also be applied to the dual lens 1 and the multiple lens. 1 camera module. For example, FIG. 13 is an embodiment of a dual-lens 1 structure camera module including a first camera module 101a and a second camera module 101b. It only changes the number of camera modules, and the principle and effect are the same as those of the foregoing single-lens 1 camera module, and will not be described herein.

In a second aspect, as shown in FIG. 14 and FIG. 15 , the present application provides a mobile terminal 100 , which includes a main board and a camera module 101 of any of the above technical solutions. The camera module is electrically connected to the main board 102 .

The mobile terminal provided by the embodiment of the present invention has a dustproof groove formed on the surface of the voice coil motor in the camera module, and the dustproof groove is opposite to the lower opening of the gap in the incident direction 8 of the light. Therefore, the foreign matter entering from the gap falls into the dustproof groove, so that the foreign matter can be prevented from falling onto the infrared filter. At the same time, the dust-proof groove is directly formed on the filter holder to avoid adding new parts, which simplifies the installation process and saves safety. The space is provided to reduce the thickness of the mobile terminal.

It should be noted that the mobile terminal of the present invention is described by taking a mobile phone as an example. Of course, the mobile terminal in the embodiment of the present application is not limited to a mobile phone. The mobile terminal may include a mobile phone, a tablet computer, a notebook computer, a personal digital assistant (PDA), a point of sales (POS), a car computer, and the like. The specific form of the mobile terminal is not limited in the embodiment of the present invention.

It will be understood by those skilled in the art that the structure of the above mobile terminal does not constitute a limitation of the mobile terminal, and may include more or less components than those illustrated, or combine some components, or split some components, or different. Assembly of parts. Those skilled in the art will appreciate that the handset may include more or fewer User Interfaces (UIs) than shown in FIG.

FIG. 15 is a structural diagram of the mobile terminal when the back cover is removed. The mobile terminal further includes a back cover, and the rear cover is provided with a avoidance hole corresponding to the position of the lens 1 in the camera module.

The embodiment of the present application can also be applied to the mobile terminal of the dual lens 1. As shown in FIG. 15, the camera module is two groups, and the two camera modules are arranged side by side and electrically connected to the main board respectively. Thereby, double lens 1 shooting can be achieved.

Specifically, the camera module can be electrically connected to the main board of the mobile terminal through the flexible circuit board 103. Specifically, as shown in FIG. 15, one end of the flexible circuit board 103 is electrically connected to the PCB board of the camera module, and the other end is electrically connected to the main board 102 of the mobile terminal through the BTB connector 104. The flexible circuit board has the characteristics of high wiring density, light weight, and thin thickness.

In the description of the specification, specific features, structures, materials or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

The above is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention. It should be covered by the scope of the present invention. Therefore, the scope of the invention should be determined by the scope of the appended claims.

Claims

A camera module characterized by comprising a voice coil motor and a filter holder disposed in sequence along an incident direction of light, the voice coil motor comprising a motor housing and a motor body disposed in the motor housing, a gap is formed between the motor body and the motor casing, the motor body has a center hole, a lens is disposed in the center hole, and the filter holder is provided with a filter mounting groove on a surface of the voice coil motor and a dust filter, an infrared filter is disposed in the filter installation slot, the lens and the infrared filter are sequentially arranged along an incident direction of the light, and the dustproof groove is located in the filter installation slot away from the camera mode One side of the optical axis of the group, and the dustproof groove is opposed to the opening of the filter holder in the incident direction of the light.
The camera module according to claim 1, wherein the bottom surface of the dustproof groove is a sloped surface, and the bottom surface is inclined downward from a side of the optical axis of the camera module.
The camera module according to claim 2, wherein the dustproof groove comprises a first side wall away from an optical axis of the camera module, and a bottom surface of the dustproof groove is away from the camera module The edge of the optical axis is connected to the lower edge of the first sidewall, and the bottom surface of the dustproof groove is adjacent to the edge of the sidewall of the filter mounting slot near the edge of the optical axis of the camera module.
The camera module according to claim 2 or 3, wherein the first side wall is recessed in a direction away from the optical axis of the camera module to form a concave curved surface.
The camera module according to any one of claims 2 to 4, wherein when the opening of the dustproof groove is substantially in the same plane as the opening of the filter mounting groove, the dustproof groove The angle between the bottom surface and the horizontal plane is approximately 3° to 5°.
The camera module according to claim 1, wherein a bottom surface of the dustproof groove is disposed in a direction perpendicular to an optical axis of the camera module, and the dustproof groove includes an optical axis adjacent to the camera module. a second side wall and a third side wall away from the optical axis of the camera module, the opposite edges of the bottom surface of the dustproof groove and the lower edge of the second side wall and the third side wall respectively The lower edge of the connection.
The camera module according to any one of claims 1 to 6, wherein when the opening of the dustproof groove is substantially in the same plane as the opening of the filter mounting groove, the dustproof groove The depth is approximately 0.05 to 0.1 mm.
The camera module according to any one of claims 1 to 7, wherein the dustproof groove is provided around a circumference of the filter mounting groove.
The camera module according to any one of claims 1 to 8, wherein the dustproof groove comprises a first dustproof groove and a second dustproof groove, the first dustproof groove and the second protection The dust grooves are respectively disposed on opposite sides of the filter mounting groove.
The camera module according to any one of claims 1 to 9, wherein the dustproof groove is provided with dustproof glue.
The camera module according to claim 10, wherein the bottom surface of the dustproof groove is covered with dustproof glue, or the bottom surface and all the side walls of the dustproof groove are covered with dustproof glue.
The camera module according to claim 10 or 11, wherein the dustproof glue is glue or double-sided tape.
The camera module according to any one of claims 1 to 12, further comprising a light sensor, wherein the light sensor is disposed on a side of the infrared filter away from the lens.
The camera module according to claim 13, wherein a surface of the filter holder away from the voice coil motor is provided with a photosensor housing cavity, and the photo sensor is disposed in the photosensor housing cavity.
The camera module according to any one of claims 1 to 14, further comprising a protection mirror, wherein the protection mirror, the voice coil motor and the filter holder are sequentially disposed along the incident direction of the light, and the protection A mirror obscures the center hole of the motor body.
A mobile terminal, comprising: a main board and the camera module according to any one of claims 1 to 15, wherein the camera module is electrically connected to the main board.
The mobile terminal according to claim 16, wherein the camera modules are two groups, and the two sets of the camera modules are arranged side by side and electrically connected to the main board respectively.
The mobile terminal according to claim 16 or 17, wherein the camera module and the main board are electrically connected by a flexible circuit board.