CN112153285A

CN112153285A - Camera device

Info

Publication number: CN112153285A
Application number: CN202011008318.6A
Authority: CN
Inventors: 曹能富; 王鹏
Original assignee: Shanghai Chuanggong Telecom Technology Co Ltd
Current assignee: Shanghai Chuanggong Telecom Technology Co Ltd
Priority date: 2020-09-23
Filing date: 2020-09-23
Publication date: 2020-12-29

Abstract

The invention discloses a camera device, comprising: the camera comprises a camera, a first driving assembly bearing the camera, an image sensor and a second driving assembly bearing the image sensor. The first driving assembly is used for controlling the lens of the camera to move in a first direction and fixing the camera in a second direction, the first direction is a focal length adjusting direction of the camera, and the second direction is a direction parallel to the camera and the image sensor. And the second driving component is used for controlling the image sensor to move in the second direction. Through the first driving assembly, the lens of the camera is controlled to move in the first direction, and the automatic zooming of the camera device is realized. The image sensor is controlled by the second driving component to move in the second direction, so that the optical anti-shake function and the automatic zooming function of the camera device are not interfered with each other.

Description

Camera device

Technical Field

The present invention relates to the field of electronics, and in particular, to an image capturing apparatus.

Background

In the prior art, an image pickup apparatus of a terminal implements AF (Automatic focusing) and OIS (Optical image stabilization), and generally implements AF and OIS by changing the relative position of a lens on an image pickup head and an image sensor in the image pickup apparatus.

Specifically, changing the relative position of the lens and the image sensor is generally performed by a VCM (Voice Coil Motor). The VCM controls the lens of the camera to move back and forth on one hand so as to adjust the focal length of the camera, and controls the camera to move left and right on the parallel surface of the image sensor so as to realize optical anti-shake on the other hand.

However, in actual use, the focus or alignment is still not ideal, and therefore, it is necessary to provide an image pickup apparatus that improves the focus or alignment.

Disclosure of Invention

The embodiment of the invention provides a camera device, which is used for avoiding mutual interference of horizontal movement and vertical movement of a lens, simplifying the structure of a VCM component and reducing the structural cost of the VCM component.

In a first aspect, an embodiment of the present invention provides an imaging apparatus, including: the camera comprises a camera, a first driving assembly bearing the camera, an image sensor and a second driving assembly bearing the image sensor;

the first driving assembly is used for controlling the lens of the camera to move in a first direction and fixing the camera in a second direction; the first direction is a focal length adjusting direction of the camera, and the second direction is a direction parallel to the camera and the image sensor;

the second driving component is used for controlling the image sensor to move in the second direction.

According to the technical scheme, the first driving assembly controls the lens of the camera to move in the first direction, and the automatic zooming of the camera device is achieved. Fix the camera on the second direction through first drive assembly to firm camera lens promotes the formation of image effect. The image sensor is controlled to move in the second direction through the second driving assembly, optical anti-shaking of the camera device is achieved, the automatic zooming function and the optical anti-shaking function of the camera device are not achieved through the same assembly, the optical anti-shaking function and the automatic zooming function of the camera device are not interfered with one another, and focusing or aligning efficiency of a lens is improved.

Optionally, the first driving assembly is a voice coil motor provided with a first inductance coil;

the second driving assembly comprises a moving part and a telescopic part, wherein the moving part is provided with a second inductance coil;

the image sensor is arranged on one surface of the moving piece facing the camera; the moving piece is used for moving the moving piece from an initial position along the second direction under the action of the voice coil motor when the second inductance coil is electrified;

the telescopic component is used for moving the moving part to the initial position when the second inductance coil is not electrified.

Among the above-mentioned technical scheme, the camera device that moves is resumeed through the flexible part of second drive assembly, no longer need the voice coil motor with the horizontal direction reset position of camera lens, reduced the part that is used for resumeed the camera lens horizontal direction position among the voice coil motor, make the structure of voice coil motor simpler, reduced the cost of voice coil motor.

Optionally, the second driving assembly further comprises a fixed part for bearing the moving part;

the moving part is connected with the fixing part in a sliding mode.

Among the above-mentioned technical scheme, after first inductance coils produced the lorentz force with the magnetic field when circular telegram, made the moving member slide on the mounting through sliding connection to reduce the frictional force of mobile device under the lorentz force drive, increase the smoothness and the stationarity of moving member when removing, thereby realize camera device's optics anti-shake function.

Optionally, the moving part and the fixed part are concentrically arranged at the initial position;

the telescopic part is positioned in the peripheral area of the fixed part; the peripheral area is an area where the fixed part and the moving part do not overlap.

Optionally, the telescopic part is an elastic part;

the elastic component is arranged on one circle of the periphery of the moving part.

Optionally, the elastic member is a shape memory material.

Optionally, a ball guide is arranged between the moving member and the fixing member.

Optionally, the second inductance coil and each magnet in the voice coil motor are arranged in one-to-one correspondence along the first direction.

Optionally, the center of the lens is coaxial with the center of the image sensor.

In a second aspect, an embodiment of the present invention provides a terminal, including: an image pickup apparatus.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a voice coil motor according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of an image capturing apparatus according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of an image capturing apparatus according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the prior art, the relative position between a lens and an image sensor on a camera head in an image pickup device is generally changed through a voice coil motor, so as to realize the AF function and the OIS function of the image pickup device. Fig. 1 schematically shows a structure of a voice coil motor. As shown in fig. 1, the voice coil motor includes: an optical anti-shake assembly 110 and a voice coil motor assembly 120.

The optical anti-shake assembly 110 is fixedly disposed, and the optical anti-shake assembly 110 includes an image sensor 111 and a plurality of optical anti-shake coils 112.

The voice coil motor assembly 120 is correspondingly arranged for the position of the optical anti-shake assembly 110, and the voice coil motor assembly 120 includes a lens 121, a lens holder 122, a voice coil motor coil 123, a magnet 124, a restoring device 125 and a housing 126.

The housing 126 is correspondingly fixedly disposed with respect to the position of the fixedly disposed optical anti-shake assembly 110.

The restoring device 125 is used to restore the vcm assembly 120 to the initial state when the vcm assembly 120 is in the initial position and is not under stress. For example, the restoring means 125 may be a leaf spring.

As shown in fig. 1 a, when the optical anti-shake coil 112 is not energized, the voice coil motor assembly 120 is in an initial state, and the center of the lens 121 corresponds to the center of the image sensor 111.

As shown in fig. 1 b, when the optical anti-shake coil 112 is energized, if the energization is as shown in fig. 1 b, where the symbol "x" is the inward direction of the current, and the symbol "·" is the outward direction of the current, that is, the current direction in the top view is counterclockwise, the optical anti-shake coil 112 generates the leftward driving force shown in fig. b (that is, the leftward driving force in the horizontal motion or the leftward driving force in the second direction) under the action of the lorentz force applied to the magnetic field. Because the optical anti-shake assembly 110 is fixedly arranged, the magnet 124 has a relative driving force towards the right as shown in fig. b, so that the voice coil motor assembly 120 is displaced towards the right in the housing 126, the relative position of the lens 121 and the image sensor 111 in the second direction is changed, and the OIS function of the camera device is realized. And the restoring means 125 is connected at one end to the fixedly disposed housing 126 and at the other end to the movable voice coil motor assembly 120. As shown in fig. 1 b, when the movable vcm assembly 120 is under a force, one end of the restoring unit 125 is fixedly connected to the housing 126, and the other end of the restoring unit is displaced along with the movable vcm assembly 120, so that the housing 126 is connected to the vcm assembly 120. After the vcm assembly 120 is displaced and is not stressed (the coil is not energized), the vcm assembly 120 is restored to the initial state (i.e., the state shown in fig. 1 as a).

Similarly, as shown in fig. 1, in accordance with the direction of the current, the rightward driving force (i.e., rightward driving force in the horizontal movement or rightward driving force in the second direction) shown in fig. c is generated. There is a relative driving force of the voice coil motor assembly 120 to the left as shown in fig. c to cause the voice coil motor assembly 120 to displace to the left within the housing 126.

When the voice coil motor coil 123 is operated, the voice coil motor coil 123 generates an upward or downward driving force (i.e., an upward or downward driving force in a vertical motion or an upward or downward driving force in a first direction) as shown in fig. b under the action of the lorentz force applied to the magnetic field generated by the magnet 124, so that the voice coil motor assembly 120 is displaced upward or downward within the housing 126, the relative position of the lens 121 and the image sensor 111 in the first direction (vertical direction) is changed, and the AF function of the imaging apparatus is realized.

However, in the above technical solution, the movable space in the voice coil motor assembly 120 is large (i.e. horizontal direction and vertical direction), the internal parts in the voice coil motor assembly 120 have complex structures, which easily makes the camera image blur, affects the user's photographing experience, and the horizontal movement and the vertical movement of the lens interfere with each other. For example, if the AF command is turned on and the OIS command is turned off, the lens moves in the vertical direction, but it is difficult to ensure that the horizontal position of the lens is at the very center of the image sensor, which affects the clarity of the camera image, and the internal components of the voice coil motor assembly 120 are complicated in structure and costly.

Embodiments of the present invention provide an image capturing apparatus, which is used to prevent an optical anti-shake function (OIS) and an automatic zoom function (AF) of the image capturing apparatus from interfering with each other, and improve focusing or aligning efficiency of a lens.

Fig. 2 is a schematic structural diagram of an image pickup apparatus exemplarily illustrated in an embodiment of the present invention. As shown in fig. 2, the image pickup apparatus includes: camera 210, a first driving assembly 220 carrying camera 210, an image sensor 230, and a second driving assembly 240 carrying image sensor 230.

The first driving assembly 220 is configured to control a lens of the camera 210 to move in a first direction and fix the camera 210 in a second direction. The first direction is a focal length adjusting direction of the camera and is used for achieving an automatic zooming function of the camera device.

And a second driving assembly for controlling the image sensor 230 to move in a second direction. The second direction is a direction parallel to the camera 210 and the image sensor 230, and is used for implementing an optical anti-shake function of the image capturing apparatus.

In the embodiment of the invention, the camera only moves in the first direction and does not move in the second direction through the first driving assembly, so that the automatic zooming function of the camera device is intelligently realized, and the optical anti-shake function of the camera device cannot be realized. But the optical anti-shake function of the camera device is realized through the second driving component, so that the optical anti-shake function and the automatic zooming function of the camera device are not interfered with each other any more. For example, the first driving assembly can drive the lens to be close to or far away from an object to be imaged in a servo motor driving mode, so that an automatic zooming function is realized. The second driving component can wrap the suspension lens through magnetic force, when the gyroscope in the lens detects small movement, the second driving component can transmit signals to the microprocessor to immediately calculate the displacement required to be compensated, and then the second driving component compensates according to the shaking direction and the displacement of the lens through the compensation lens group, and the compensation lens group correspondingly adjusts the position and the angle to keep the light path stable, thereby overcoming the image blur generated by vibration.

Further, the first driving assembly 220 is a voice coil motor provided with a first inductance coil 221. The first inductance coil 221 is electrified to generate a lorentz force in a magnetic field to drive the camera 210 to be close to or far away from an object to be imaged, so that an automatic zooming function is realized.

The second driving assembly 240 includes a moving member 242 provided with a second inductor 241 and a telescopic member 243. The second inductance coil 241 may be disposed inside the moving element 242, or may be disposed on a surface of the moving element 242 facing the camera 210. The moving member 242 may be an insulating material, such as plastic. Thereby reducing the weight of the moving member 242 and facilitating the accommodation of the second inductor 241.

The image sensor 230 is disposed on a surface of the moving member 242 facing the camera 210. The moving member 242 is configured to move the moving member 242 in the second direction from the initial position under the action of the voice coil motor when the second inductor 241 is energized.

Specifically, as shown in d of fig. 2, when the second inductor 241 is not energized, the second inductor 241 has no lorentz force, and the moving member 242 is at the initial position.

As shown in e of fig. 2, when the second inductor 241 is energized, the energizing direction in the plan view is counterclockwise, the second inductor 241 generates a driving force to the left in the second direction according to the magnetic field of the voice coil motor, and further moves the moving member 242 from the initial position to the left in the second direction. As shown in f of fig. 2, when the second inductor 241 is energized clockwise in a plan view, the second inductor 241 generates a driving force rightward in the second direction by the magnetic field of the voice coil motor according to the lorentz force, and further moves the moving element 242 rightward in the second direction from the initial position. The relative position of the lens of the camera 210 and the image sensor 230 is changed, and the optical anti-shake function of the camera device is not realized through the voice coil motor any longer, so that the optical anti-shake function and the automatic zooming function of the camera device are not interfered with each other any longer. The voice coil motor includes a magnet 222, and the N poles of the magnets face the camera head 210.

Further, the second driving assembly further includes a fixed part 244 carrying the moving part 242, and the moving part 242 and the fixed part 244 are connected in a sliding manner. For example, the sliding connection can be achieved by providing a sliding rail or a universal wheel on the side of the moving member 242 facing the fixed member 244. The fixing member 244 is used to limit the position of the moving member 242, and may be made of a metal material having high strength and hardness, such as an alloy.

Specifically, as shown in fig. 2 d, e and f, a ball guide 245 is disposed between the moving member 242 and the fixed member 244, and the moving member 242 and the fixed member 244 are slidably connected through the ball guide 245. The ball guide 245 is used to reduce the friction between the moving member 242 and the stationary member 244, and to increase the smoothness and smoothness of the moving member 242 during movement.

Fig. 3 is a top view of an exemplary imaging device according to an embodiment of the present invention. As shown in fig. 3, when the second inductor 241 is not energized, the moving part 242 and the fixed part 244 are concentrically arranged at the initial position. The telescoping members 243 are located in a peripheral region on the mount 244. The peripheral region is a region where the fixed member 244 and the moving member 242 do not overlap. Note that the dashed line 1 is a hatching line so that d, e, and f in fig. 2 illustrate the extensible member 243.

Further, the telescopic member 243 is an elastic member, and the elastic member is disposed around the moving member 242.

Illustratively, the resilient member is a shape memory material. For example, the elastic member is a shape memory polymer material such as polycaprolactone or polyethylene.

For example, the telescopic member 243 may also use magnetic levitation technology to restore the moving element 242, which is displaced when the second inductor 241 is not energized, to the initial state. As shown in fig. 3, the second inductors 241 are provided in one-to-one correspondence with the magnets 222 in the voice coil motor in the first direction. The second inductor 241 is configured to generate a lorentz force according to a magnetic field of the magnet 222 when energized. For example, in a case where the lorentz force may be generated, the second inductance coil 241 may be disposed not corresponding to the magnet 222 along the first direction, and a specific disposition position is not limited herein.

As shown in d of fig. 2, when the second inductance coil 241 is not energized, the lens center of the camera 210 is disposed coaxially with the center of the image sensor 230.

In the embodiment of the invention, the automatic zooming of the camera device is realized through the first driving assembly, and the optical anti-shake of the camera device is realized through the second driving assembly. So that the optical anti-shake function and the auto-zoom function of the image pickup apparatus do not interfere with each other. The camera device which moves through the telescopic part of the second driving assembly is restored, a restoring device in the voice coil motor is not needed to restore the position of the lens in the horizontal direction, the restoring device used for restoring the position of the lens in the horizontal direction in the voice coil motor is omitted, the structure of the voice coil motor is simpler, and the cost of the voice coil motor is reduced. And after the first inductance coil generates Lorentz force with the magnetic field when being electrified, the moving part slides on the fixed part through sliding connection, so that the friction force between the moving part and the fixed part is reduced, and the fluency and the stability of the moving part during moving are improved.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.

Claims

1. An image pickup apparatus, comprising: the camera comprises a camera, a first driving assembly bearing the camera, an image sensor and a second driving assembly bearing the image sensor;

2. The image pickup apparatus according to claim 1, wherein said first driving assembly is a voice coil motor provided with a first inductance coil;

3. The camera device of claim 1, wherein said second drive assembly further comprises a stationary member carrying said moving member;

the moving part is connected with the fixing part in a sliding mode.

4. The image pickup apparatus as set forth in claim 3, wherein said moving member and said stationary member are concentrically disposed in said initial position;

5. The image pickup apparatus according to claim 4, wherein said extensible member is an elastic member;

6. The image pickup apparatus according to claim 5, wherein said elastic member is a shape memory material.

7. The image pickup apparatus as set forth in claim 3, wherein a ball guide is provided between said moving member and said fixed member.

8. The image pickup apparatus according to any one of claims 2 to 7, wherein the second induction coil is provided in one-to-one correspondence with each magnet in the voice coil motor in the first direction.

9. The image pickup apparatus according to claim 8, wherein the lens center is disposed coaxially with a center of the image sensor.

10. A terminal characterized by comprising the camera device according to any one of claims 1 to 9.