CN211239925U

CN211239925U - Mobile terminal

Info

Publication number: CN211239925U
Application number: CN201922072041.2U
Authority: CN
Inventors: 陈嘉伟; 周奇群; 韦怡; 张海裕; 周彦汝
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2019-11-27
Filing date: 2019-11-27
Publication date: 2020-08-11
Anticipated expiration: 2029-11-27

Abstract

The embodiment of the application provides a mobile terminal, which comprises a shell, a lens group, a driving mechanism, an image sensor and a PCB, wherein the image sensor and the PCB are arranged on the image side of the lens group; the lens group comprises a mounting seat and a plurality of lenses connected with the mounting seat, wherein at least one of the lenses is a main shooting lens and at least one of the lenses is an ultra-micro lens; the image sensor is used for imaging the light rays passing through the lens and arranged on the PCB; the driving mechanism is connected with the lens group to drive a plurality of lenses in the lens group to be alternatively matched with the image sensor. The mobile terminal can be provided with only one image sensor for the plurality of lenses, so that the cost is reduced, the installation space of the image sensor is saved, and the area of a PCB (printed circuit board) occupied by the image sensor of the mobile terminal can be reduced; moreover, at least one of the multiple lenses is a main shooting lens and at least one of the multiple lenses is an ultra-micro lens, so that ultra-micro shooting can be realized, and the requirement of close-range ultra-micro shooting is met.

Description

Mobile terminal

Technical Field

The utility model belongs to the technical field of the formation of image, especially, relate to a mobile terminal.

Background

Taking a mobile phone as an example, a plurality of cameras are generally arranged in the mobile phone, and each camera works independently, that is, each camera is configured with an image sensor, and a PCB with a large area is required to install the image sensor.

SUMMERY OF THE UTILITY MODEL

In view of the above, embodiments of the present application are directed to a mobile terminal having an image sensor occupying a smaller PCB area.

To achieve the above object, an embodiment of the present application provides a mobile terminal, including:

a housing;

the lens group is arranged in the shell and comprises a mounting seat and a plurality of lenses connected with the mounting seat, wherein at least one of the lenses is a main shooting lens and at least one of the lenses is an ultra-macro lens;

the image sensor is arranged on the image side of the lens group and used for imaging light rays passing through the lens, and the image sensor is arranged on the PCB;

a driving mechanism connected with the lens group to drive a plurality of the lenses in the lens group to alternatively match the image sensor.

Further, a view finding hole is formed on the housing, and the lens of the lens group is alternatively aligned with the view finding hole.

Further, the viewing hole and the image sensor are both located on an optical axis of the lens matched with the image sensor.

Further, the ultramicro-range lens can image under the condition that the working distance is in an ultramicro range, and the ultramicro range is 3-9 mm.

Further, the focal length f of the ultramicro lens ranges from 1.3mm to 2.2mm, and the field angle range of the ultramicro lens ranges from 70 degrees to 78 degrees.

Furthermore, a hollow accommodating cavity is formed in the mounting seat, and part of the structure of the lens is arranged in the accommodating cavity; the accommodating cavity is open towards one side of the image sensor; one side of the mounting seat, which deviates from the image sensor, is provided with a plurality of avoiding holes, and the other part of the structure of the lens penetrates through the corresponding avoiding holes.

Furthermore, the mobile terminal comprises a guide seat and a guide rail, the guide rail is fixedly connected with the shell, the guide seat is arranged on the guide rail and can slide relative to the guide rail, and the guide seat is fixedly connected with the mounting seat; the guide seat can drive the mounting seat to move relative to the image sensor under the driving of the driving mechanism.

Further, the driving mechanism comprises a motor and a lead screw in driving connection with the motor, and the lead screw is in threaded connection with the guide seat; the lead screw is arranged in parallel with the guide rail along the extension direction of the guide rail; the motor drives the lead screw to rotate so that the lead screw can drive the guide seat to move along the guide seat, the mobile terminal further comprises a limiting piece, and the mounting seat is in stop contact with the limiting piece when at least one of the lenses is located at a position matched with the image sensor.

Furthermore, the number of the limiting parts is two, and the two limiting parts are arranged on two opposite sides of the mounting base along the sliding direction.

According to the mobile terminal, the lens group is driven to move by the driving mechanism, so that the plurality of lenses can be alternatively matched with the image sensor, on one hand, only one image sensor can be configured for the plurality of lenses, the cost is reduced, the installation space of the image sensor is saved, and the area of a PCB (printed circuit board) occupied by the image sensor of the mobile terminal can be reduced; in addition, in the scheme, at least one of the plurality of lenses is the main shooting lens and at least one of the plurality of lenses is the ultra-micro distance lens, so that ultra-micro distance shooting can be realized, and the requirement of a user for close-range ultra-micro distance shooting is met.

Drawings

FIG. 1 is a schematic view of a lens set and an image sensor according to an embodiment of the present disclosure;

FIG. 2 is a schematic diagram of the structure shown in FIG. 1 and a PCB board, wherein the ultramicro lens is matched with the image sensor;

FIG. 3 is a schematic diagram of another state of the structure shown in FIG. 2, wherein the main camera lens is matched with the image sensor;

fig. 4 is a schematic structural diagram of a mobile terminal according to an embodiment of the present application, in which a main camera lens is aligned with a view finder;

FIG. 5 is a schematic view of the structure of FIG. 4 in another state, in which the lens assembly is aligned with the viewing aperture;

FIG. 6 is a schematic view illustrating a driving connection between a driving mechanism and a lens set according to an embodiment of the present application;

fig. 7 is a schematic diagram of a mobile terminal according to an embodiment of the present application.

Description of the reference numerals

A housing 10; a finder hole 10 a; a lens group 20; a lens 21; a main camera lens 21'; an ultra-fine pitch lens 21 "; a mounting seat 22; a housing cavity 220; an image sensor 30; a drive mechanism 40; a motor 41; a lead screw 42; a guide base 51; a guide rail 52; a stopper 53; PCB board 70

Detailed Description

It should be noted that, in the present application, technical features in examples and embodiments may be combined with each other without conflict, and the detailed description in the specific embodiment should be understood as an explanation of the gist of the present application and should not be construed as an improper limitation to the present application.

In the description of the present application, the "length" and "width" orientation or positional relationship is based on the orientation or positional relationship shown in fig. 4 or 5, and the "thickness" is a direction perpendicular to a plane composed of the length direction and the width direction shown in fig. 3. It is to be understood that such directional terms are merely for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the present application.

In the description of the present application, a plurality means two or more.

Referring to fig. 1 and 4, the mobile terminal according to the embodiment of the present disclosure includes a housing 10, a lens set 20, an image sensor 30, a PCB 70, and a driving mechanism 40. The housing 10 is an exterior member of the mobile terminal, for example, a back panel of a mobile phone; the housing 10 is provided with a viewing hole 10a for allowing light to enter the lens group 20. The lens group 20 is disposed in the housing 10, and specifically, the lens group 20 includes a mount 22 and a plurality of lenses 21 connected to the mount 22, at least one of the plurality of lenses 21 being a main lens 21' and at least one being an macro lens 21 ″. The macro lens 21 "refers to a lens 21 capable of clearly imaging with a working distance in a macro range. The working distance is a distance from the subject to the front end of the lens.

Referring to fig. 2 and 3, the image sensor 30 and the PCB 70 are disposed on the image side of the lens assembly 20, the image sensor 30 is disposed on the PCB 70, and the image sensor 30 is used for imaging the light passing through the lens 21.

The driving mechanism 40 is connected to the lens group 20 to drive the plurality of lenses 21 in the lens group 20 to be alternatively matched with the image sensor 30, that is, at most one lens 21 can be matched with the image sensor 30 at the same time. The matching means that the object side of the lens 21 is aligned with the image sensor 30, and the image sensor 30 can image the light passing through the lens 21.

In the embodiment of the application, the driving mechanism 40 drives the lens group 20 to move, so that the plurality of lenses 21 can be alternatively matched with the image sensor 30, on one hand, only one image sensor 30 can be configured for the plurality of lenses 21, the cost is reduced, the installation space of the image sensor 30 is saved, and the area of the PCB 70 occupied by the image sensor of the mobile terminal can be reduced; furthermore, in the present solution, at least one of the plurality of lenses 21 is the main shooting lens 21' and at least one of the plurality of lenses is the macro lens 21 ″, that is, the mobile terminal in the present solution can implement macro shooting, and meets the requirement of the user for close-range macro shooting.

The image sensor 30 includes, but is not limited to, a CCD (charge Coupled Device), a CMOS (Complementary Metal Oxide Semiconductor).

In the shooting process, referring to fig. 7, light of a shot object 61 firstly enters the lens 21 and then reaches the image sensor 30, photons in the light strike the image sensor 30 to generate movable charges, which are internal photoelectric effects, the movable charges are collected to form electric signals, Digital-to-analog conversion is performed through an a/D converter, that is, the electric signals are converted into Digital signals, the Digital signals are sent to a Digital Signal Processor (DSP) for processing, and finally the Digital signals are transmitted to a screen of a mobile terminal to form a display image 62, so that shooting of the shot object is achieved. Specifically, the structure of the DSP includes an ISP (image signal Processor) and a JPEG encoder (JPEG image decoder), wherein the ISP is a key for determining the smoothness of the image. It will be appreciated that for CMOS, the DSP may be integrated within the CMOS. The CMOS has the advantages of high integration level, low power consumption, low cost and the like, and is more suitable for mobile phones with limited installation space.

The PCB board can be a hard board, a soft board or a rigid-flexible board. When the mobile phone adopts the CMOS, the CMOS can be applied to any one of a hard board, a soft board, or a rigid-flex board. When the mobile phone adopts the CCD, only the rigid-flexible board can be used, and the rigid-flexible board has the highest price among the three boards, so that when the CCD is adopted, the cost of the mobile phone is higher.

In the embodiment of the application, the lens 21 can perform close-range ultra-macro shooting, where the ultra-macro shooting refers to shooting with a larger optical magnification ratio when the mobile terminal is close to a shot object on the premise of ensuring clear imaging of the shot object through the optical capability of the lens 21, where the optical magnification ratio refers to a ratio between an imaging height of the image sensor 30 and a height of the shot object.

It should be noted that, the magnification sensed by the user is an optical magnification, i.e., a screen magnification, i.e., a digital magnification, the optical magnification refers to a ratio of a height of an image formed on the image sensor 30 to a height of a subject, the screen magnification refers to a ratio of a screen size to a size of the image sensor 30, and the digital magnification refers to a ratio of a size on the screen after the user manually enlarges a part of the screen to generate enlargement of the same part to a size on the screen before enlargement. Specifically, for example, as shown in fig. 7, the light reflected by the object 17 reaches the image sensor 30 after passing through the lens 21, and then generates an electrical signal, which is converted into a digital signal by the analog-to-digital conversion device, and then transmitted to the screen of the mobile terminal to form an image 62 after being processed by the DSP, and the user can enlarge a part of the image 62 on the screen as needed, and the image displayed on the screen is a screen enlarged image 63.

Specifically, according to the basic optical imaging principle, tan (FOV/2) is the imaging height/focal length which is the subject height/object distance, and the optical magnification is the imaging height/subject height which is the focal length/object distance. The FOV is a field angle, and the field angle is an angle formed by two sides of the optical instrument, which have the center of the lens 21 of the optical instrument as a vertex and allow a subject or an object to pass through the center of the lens 21 in the maximum range. The FOV is typically measured as the field of view of the lens 21, e.g., a conventional standard lens with an angle of view around 45 degrees and a wide-angle lens with an angle of view above 60 degrees. According to the above formula for calculating the optical magnification, the increase of the optical magnification can be realized by reducing the object distance or increasing the focal length, that is, on the premise of ensuring clear imaging, the lens 21 is as close to the object to be shot as possible and the focal length of the lens 21 is increased.

According to the gaussian imaging formula, 1/f is 1/u + 1/v. Wherein f is the focal length; u is the object distance; v is the image distance; when u >2f, the inverted image is reduced on the image sensor; when u is 2f, v is f, namely the focal length is equal to the image distance, forming an equal-size inverted image on the image sensor; f < u <2f, forming an enlarged inverted image on the image sensor; when u is f, no imaging is carried out; when u < f, it is a virtual image and cannot be imaged on the image sensor. Therefore, v and u have opposite changing trends with constant focal length f, and v decreases with increasing u and v increases with decreasing u. Since the ultra-macro photography is a photography method for obtaining an enlarged image of a subject in a close range, i.e., an enlarged real image is formed on the image sensor 30, the object distance u is relatively small and the working distance is relatively small in the close-range ultra-micro photography, so that the focal length of the lens 21 needs to be smaller to satisfy the requirement of focusing, so as to ensure that f < u <2f, and the image distance and the object distance satisfy the above gaussian imaging formula.

The internationally acknowledged statement in the photographic world is that shooting with optical magnification of about 1: 1-1: 4 belongs to macro photography, and in the embodiment of the application, the ultra-macro lens refers to a macro lens which can still realize focusing when the working distance is less than 10mm, namely, an image sensor can still clearly image when the working distance is less than 10 mm. In the present embodiment, "less than" does not include the number.

In one embodiment, the ultramicro-distance range is 3mm to 9 mm. That is, when the working distance is 3mm to 9mm, the lens group 20 can image and a clear image can be received on the image sensor 30.

The macro lens 21 "may be a telephoto macro lens 21" or a wide-angle macro lens 21 ". In the embodiment Of the present application, the macro lens 21 "is a wide-angle macro lens 21", specifically, a focal length f Of the macro lens 21 "ranges from 1.3mm to 2.2mm, and a Field angle (FOV) Of the macro lens 21" is 70 ° to 78 °. Illustratively, the effective focal length f of the wide-angle ultramicro lens is 1.335mm, the field angle at the maximum image height is 77.6 degrees, the aperture value (f-number) is 2.8, and the minimum working distance is 3mm, that is, the lens can focus on a shot object with the working distance of about 3mm, and the optical magnification is 1: 2.

In an embodiment, the object sides of the lenses 21 are located on the same side of the housing 10, and taking a mobile phone as an example, the lenses 21 are rear lenses 21 of the mobile phone. Further, the optical axes of the plurality of lenses 21 in the lens group 20 are parallel, so that the mount 22 only needs to be translated without being rotated during the movement.

In one embodiment, the lenses 21 in the lens assembly 20 are alternatively aligned with the viewing holes 10a, that is, the lenses 21 can share one viewing hole 10a, so that the number of the viewing holes 10a on the housing 10 can be reduced, the aesthetic appearance of the mobile terminal can be improved, and the dust-proof position of the housing 10 can be reduced. Specifically, when one of the lenses 21 is moved to a position matching the image sensor 30, and the lens 21 is disposed corresponding to the finder hole 10a, incident light enters the lens 21 from the finder hole 10a during shooting, passes through the lens 21, and is imaged on the image sensor 30. Because the same view finding hole 10a is adopted, during shooting, the main shooting lens 21' can be used for shooting the whole outline of the picture, the view finding hole 10a is aligned to the interested area in the picture, and then the macro lens 21 is switched to shoot the details of the area, so that the ultra-micro shooting is more convenient and faster, and the use experience of a user is greatly enhanced.

In an embodiment, the viewing aperture and the image sensor are both located on an optical axis of a lens matched with the image sensor, that is, the geometric centers of the viewing aperture and the image sensor are located on the optical axis, so that the overall structure of the mobile terminal is compact.

Referring to fig. 2 and 3, a hollow accommodating cavity 220 is formed in the mounting seat 22, a part of the structure of the lens 21 is disposed in the accommodating cavity 220, and the mounting seat 22 plays a role in mounting and fixing the lens 21 and also plays a role in protecting the lens 21 to prevent other components from scratching the lens 21. In order to prevent the mount 22 from interfering with light passing through the lens 21, the receiving cavity 220 is open to a side facing the image sensor 30.

In an embodiment, a plurality of avoiding holes are formed on a side of the mounting seat 22 away from the image sensor 30, and another part of the lens 21 is configured to penetrate through the corresponding avoiding holes, so that the connection reliability between the lens 21 and the mounting seat 22 can be enhanced, and the lens 21 is prevented from being laterally displaced. It is understood that an end of the lens near the object side may be convex or not convex to the outer surface of the mount.

In one embodiment, the lens 21 includes a lens barrel and a lens unit disposed in the lens barrel. The number of lenses of the lens unit is not limited and the combination manner is not limited. The lens barrel plays a role in mounting and supporting the lens unit. The lens cone can be fixedly connected with the mounting seat in a dispensing mode and the like.

In order to enable the lens group 20 to move smoothly, in an embodiment, referring to fig. 6, the mobile terminal includes a guide seat 51 and a guide rail 52, and the guide rail 52 is fixedly connected with the housing 10, wherein the guide rail 52 may be directly fixedly connected with the housing 10 or indirectly fixedly connected with the housing 10 through other structures.

In the embodiment of the present application, the term "fixed connection" refers to a connection relationship between two connected parts without relative movement, and the specific connection manner is not limited, and includes but is not limited to a snap connection, a screw connection, an integral molding, and the like.

The guide seat 51 is arranged on the guide rail 52 and can slide relative to the guide rail 52, and the guide seat 51 is fixedly connected with the mounting seat 22; the guide base 51 can drive the mounting base 22 to move relative to the image sensor 30 under the driving of the driving mechanism 40. That is, the driving mechanism 40 drives the guide base 51 to slide along the guide rail 52, and the guide base 51 drives the mounting base 22 to slide. This prevents the guide rail 52 from protruding between the mount 22 and the image sensor 30, and keeps the distance between the mount 22 and the image sensor 30 small, thereby facilitating the mounting between the image sensor 30 and the lens group 20.

The switching between the lenses 21 may be manual switching or automatic switching.

In an embodiment, the switching between the lenses 21 is automatic, specifically, please refer to fig. 6, the driving mechanism 40 includes a motor 41 and a lead screw 42 in driving connection with the motor 41, the lead screw 42 is in threaded connection with the guide seat 51; the lead screw 42 is disposed parallel to the guide rail 52 in the extending direction of the guide rail 52; the motor 41 drives the lead screw 42 to rotate so that the lead screw 42 can drive the guide holder 51 to slide along the guide rail. That is, by the driving of the motor 41, the rotational motion of the lead screw 42 can be changed into the linear motion of the shoe 51, whereby the shoe 51 can be made slidable along the guide rail 52. The screw 42 and the guide seat 51 are mutually matched, so that the guide seat 51 can be ensured to be more stable in the sliding process.

Specifically, when the shooting mode needs to be switched, for example, the user uses a shooting applet, a client APP, and the like in the mobile terminal to perform macro shooting switching, the user triggers a macro shooting instruction, the control system of the mobile terminal automatically controls the motor 41 to move according to the shooting instruction of the user, and the lens corresponding to the required shooting mode is driven to the position matched with the image sensor 30.

Referring to fig. 6, the mobile terminal of the present embodiment further includes a limiting member 17, and when at least one of the lenses 21 is located at a position matching the image sensor 30, the mounting base 22 is in stop contact with the limiting member 53. Specifically, when the driving mechanism 40 drives the mounting base 22 to move to the position where the lens 21 is matched with the image sensor 30, the limiting member 53 stops the mounting base 22 to prevent the mounting base 22 from moving continuously, and the driving mechanism 40 stops driving.

Specifically, the limiting member 53 of the present embodiment is a limiting plate, and in other embodiments, the limiting member 53 may also be a limiting member having a limiting groove, as long as the limiting member can stop and limit the mounting base 22.

In an embodiment, the number of the limiting members 53 is two, and the two limiting members 53 are disposed on two opposite sides of the mounting base 22 along the sliding direction. So that the mount 22 can stop moving under the stopping action of the stopper 53 during the reciprocating motion in the sliding direction.

The above description is only a preferred embodiment of the present application, and is not intended to limit the scope of the present application.

Claims

1. A mobile terminal, comprising:

a housing;

2. The mobile terminal as claimed in claim 1, wherein the housing has a viewing aperture formed therein, and the lenses of the lens groups are alternatively aligned with the viewing aperture.

3. The mobile terminal of claim 2, wherein the viewing aperture and the image sensor are both located on an optical axis of the lens that matches the image sensor.

4. The mobile terminal of claim 1, wherein the ultramicro lens is capable of imaging with a working distance in an ultramicro range, wherein the ultramicro range is 3mm to 9 mm.

5. The mobile terminal of claim 1, wherein the focal length f of the ultramicro lens ranges from 1.3mm to 2.2mm, and the field angle of the ultramicro lens ranges from 70 ° to 78 °.

6. The mobile terminal of claim 1, wherein the mount has a hollow accommodating cavity therein, and a part of the lens is disposed in the accommodating cavity; the accommodating cavity is open towards one side of the image sensor; one side of the mounting seat, which deviates from the image sensor, is provided with a plurality of avoiding holes, and the other part of the structure of the lens penetrates through the corresponding avoiding holes.

7. The mobile terminal according to claim 1, wherein the mobile terminal comprises a guide base and a guide rail, the guide rail is fixedly connected with the housing, the guide base is disposed on the guide rail and can slide relative to the guide rail, and the guide base is fixedly connected with the mounting base; the guide seat can drive the mounting seat to move relative to the image sensor under the driving of the driving mechanism.

8. The mobile terminal according to claim 7, wherein the driving mechanism comprises a motor and a lead screw in driving connection with the motor, the lead screw is in threaded connection with the guide base; the lead screw is arranged in parallel with the guide rail along the extension direction of the guide rail; the motor drives the lead screw to rotate so that the lead screw can drive the guide seat to slide along the guide rail.

9. The mobile terminal of claim 1, further comprising a stopper, wherein the mount is in contact with the stopper when at least one of the lenses is in a position matching with the image sensor.

10. The mobile terminal according to claim 9, wherein the number of the position-limiting members is two, and two position-limiting members are disposed on two opposite sides of the mounting base along the sliding direction.