CN110661955A - Control method of camera module - Google Patents
Control method of camera module Download PDFInfo
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- CN110661955A CN110661955A CN201910974463.0A CN201910974463A CN110661955A CN 110661955 A CN110661955 A CN 110661955A CN 201910974463 A CN201910974463 A CN 201910974463A CN 110661955 A CN110661955 A CN 110661955A
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- liquid lens
- moving
- moving portion
- electric control
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/50—Constructional details
- H04N23/55—Optical parts specially adapted for electronic image sensors; Mounting thereof
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
- G02B26/004—Optical devices or arrangements for the control of light using movable or deformable optical elements based on a displacement or a deformation of a fluid
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/64—Imaging systems using optical elements for stabilisation of the lateral and angular position of the image
- G02B27/646—Imaging systems using optical elements for stabilisation of the lateral and angular position of the image compensating for small deviations, e.g. due to vibration or shake
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B3/00—Simple or compound lenses
- G02B3/12—Fluid-filled or evacuated lenses
- G02B3/14—Fluid-filled or evacuated lenses of variable focal length
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B13/00—Viewfinders; Focusing aids for cameras; Means for focusing for cameras; Autofocus systems for cameras
- G03B13/32—Means for focusing
- G03B13/34—Power focusing
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B5/00—Adjustment of optical system relative to image or object surface other than for focusing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/67—Focus control based on electronic image sensor signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/68—Control of cameras or camera modules for stable pick-up of the scene, e.g. compensating for camera body vibrations
- H04N23/682—Vibration or motion blur correction
- H04N23/685—Vibration or motion blur correction performed by mechanical compensation
- H04N23/687—Vibration or motion blur correction performed by mechanical compensation by shifting the lens or sensor position
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Studio Devices (AREA)
Abstract
The application relates to a control method of a camera module, which comprises the following steps: the utility model provides a camera module, camera module include pedestal, battery of lens, liquid lens, extrusion structure and image sensor, and the pedestal is connected respectively to battery of lens, liquid lens, extrusion structure and image sensor, and ambient light can see through battery of lens and liquid lens and incide to image sensor, and the battery of lens has the optical axis. The extrusion structure comprises a first moving part, a first electric control part, a second moving part and a second electric control part; the first electric control part is connected with a power supply to drive the first moving part to move and extrude the liquid lens so as to deflect the light emitting surface of the liquid lens around the first axis; the second electric control part is connected with a power supply to drive the second moving part to move and extrude the liquid lens so as to deflect the light emergent surface of the liquid lens around the second shaft; the first axis and the second axis are perpendicular to the optical axis respectively. The control method of the camera module can realize the two-axis anti-shake function of the camera module.
Description
Technical Field
The application relates to the technical field of optical cameras, in particular to a control method of a camera module.
Background
Mobile terminals such as smart phones are generally equipped with a camera module, and the camera module with high pixels is becoming a necessary configuration of the mobile terminal. However, as the number of pixels of the camera module increases, the size of the lens group also increases correspondingly, so that a larger driving force is required to push the lens group to move so as to realize the anti-shake function, but the larger driving force can increase the size of the driving structure correspondingly, which is not favorable for the miniaturization design of the camera module.
Disclosure of Invention
The embodiment of the application provides a control method of a camera module, which is used for meeting the anti-shake requirement of a high-pixel camera module and is beneficial to the miniaturization design of the camera module.
A control method of a camera module comprises the following steps:
providing a camera module, wherein the camera module comprises a base body, a lens group, a liquid lens, an extrusion structure and an image sensor, the lens group, the liquid lens, the extrusion structure and the image sensor are respectively connected with the base body, ambient light can penetrate through the lens group and the liquid lens and enter the image sensor, and the lens group is provided with an optical axis; the extrusion structure comprises a first moving part, a first electric control part, a second moving part and a second electric control part;
the first electric control part is connected with a power supply to drive the first moving part to move and extrude the liquid lens so as to deflect the light emitting surface of the liquid lens around a first axis;
the second electric control part is connected with a power supply to drive the second moving part to move and extrude the liquid lens so as to deflect the light emitting surface of the liquid lens around a second shaft;
the first axis and the second axis are perpendicular to the optical axis respectively.
In the control method of the camera module, the first electric control part drives the first moving part to move so as to extrude the liquid lens to enable the light emitting surface of the liquid lens to deflect around the first axis, and the second electric control part drives the second moving part to move so as to extrude the liquid lens to enable the light emitting surface of the liquid lens to deflect around the second axis, so that the two-axis anti-shake function of the camera module can be realized. By adopting the method, the deformation of the liquid lens is easy to control, the anti-shake requirement of the high-pixel camera module can be met, the miniaturization design of the camera module is facilitated, relatively high control precision and relatively high response speed can be obtained, and the shooting performance of the camera module and the user experience are improved.
In one embodiment, the pressing structure includes a third moving portion and a third electric control portion, the third moving portion is disposed on the second axis opposite to the first moving portion, and in the step of deflecting the light emitting surface of the liquid lens around the first axis, the pressing structure further includes:
the third electric control part is connected with a power supply to drive the third moving part to move and extrude the liquid lens.
In one embodiment, before the step of deflecting the light exit surface of the liquid lens around the first axis, the method further includes:
the first electric control part is powered on to drive the first moving part to move and extrude the liquid lens, and the third electric control part is powered on to drive the third moving part to move and extrude the liquid lens, so that the deformation of the liquid lens is centrosymmetric about the optical axis.
In one embodiment, the camera module includes a fourth moving portion and a fourth electric control portion, the fourth moving portion and the second moving portion are disposed on the first axis relatively, and in the step of deflecting the light emitting surface of the liquid lens around the second axis, the method further includes:
the fourth electric control part is connected with a power supply to drive the fourth moving part to move and extrude the liquid lens.
In one embodiment, before the step of deflecting the light exit surface of the liquid lens around the first axis, the method further includes:
the first electric control part, the second electric control part, the third electric control part and the fourth electric control part are respectively connected with a power supply to respectively drive the first moving part, the second moving part, the third moving part and the fourth moving part to move and extrude the liquid lens, so that the deformation of the liquid lens is centrosymmetric about the optical axis.
In one embodiment, the first moving portion, the second moving portion, the third moving portion, and the fourth moving portion are movable in an extending direction of the optical axis, respectively.
In one embodiment, the first moving part and the third moving part are centrosymmetric with respect to the optical axis, and the second moving part and the fourth moving part are centrosymmetric with respect to the optical axis.
In one embodiment, the first moving portion, the second moving portion, the third moving portion, and the fourth moving portion are sequentially disposed in a circumferential direction of the lens group, and the first axis and the second axis are perpendicular to each other.
In one embodiment, the lens group is located between the liquid lens and the image sensor; or the liquid lens is located between the lens group and the image sensor.
In one embodiment, in the extending direction of the optical axis, the projection of the first moving part and the second moving part is arranged at an interval with the projection of the lens group; or in the extending direction of the optical axis of the lens group, the projection of the first moving part at least partially overlaps with the projection of the lens group, and the projection of the second moving part at least partially overlaps with the projection of the lens group.
In one embodiment, the pressing structure includes a first elastic sheet and a second elastic sheet, the first elastic sheet is connected with the first moving portion and the base body and used for returning the first moving portion, and the second elastic sheet is connected with the second moving portion and the base body and used for returning the second moving portion.
In one embodiment, the control method includes any one of the following schemes:
the extrusion structure comprises a first magnet and a second magnet which are arranged on the seat body, the first electric control part comprises a first coil positioned in the magnetic field of the first magnet, the second electric control part comprises a second coil positioned in the second magnetic field, the first coil is connected with the first moving part, and the second coil is connected with the second moving part;
the first moving portion includes a first piezoelectric body, the first electric control portion includes a first electrode connected to the first piezoelectric body, the second moving portion includes a second piezoelectric body, and the second electric control portion includes a second electrode connected to the second piezoelectric body.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a perspective view of a terminal device according to an example of the present application;
fig. 2 is a schematic structural diagram of a camera module according to a first embodiment of the present application;
fig. 3 is a schematic structural diagram of a camera module according to a second embodiment of the present application;
fig. 4 is a flowchart of a control method of the camera module provided in the present application;
fig. 5 is a schematic position diagram of a first moving portion, a second moving portion, a third moving portion, a fourth moving portion and a liquid lens according to an embodiment of the present application;
FIG. 6 is a schematic diagram of positions of a first moving part, a second moving part, a third moving part, a fourth moving part and a liquid lens according to another embodiment of the present disclosure;
fig. 7 is another schematic structural diagram of a camera module according to the first embodiment of the present application;
fig. 8 is a schematic structural diagram of a terminal device provided in the present application.
Detailed Description
To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present application are illustrated in the accompanying drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
As used herein, "terminal device" refers to a device capable of receiving and/or transmitting communication signals including, but not limited to, devices connected via any one or more of the following connections:
(1) via wireline connections, such as via Public Switched Telephone Network (PSTN), Digital Subscriber Line (DSL), Digital cable, direct cable connections;
(2) via a Wireless interface means such as a cellular Network, a Wireless Local Area Network (WLAN), a digital television Network such as a DVB-H Network, a satellite Network, an AM-FM broadcast transmitter.
A terminal device arranged to communicate over a wireless interface may be referred to as a "mobile terminal". Examples of mobile terminals include, but are not limited to, the following electronic devices:
(1) satellite or cellular telephones;
(2) personal Communications Systems (PCS) terminals that may combine cellular radiotelephones with data processing, facsimile, and data Communications capabilities;
(3) radiotelephones, pagers, internet/intranet access, Web browsers, notebooks, calendars, Personal Digital Assistants (PDAs) equipped with Global Positioning System (GPS) receivers;
(4) conventional laptop and/or palmtop receivers;
(5) conventional laptop and/or palmtop radiotelephone transceivers, and the like.
Referring to fig. 1, in some embodiments, the terminal device 10 is a smart phone, the terminal device 10 includes a camera module 100 and a housing 200, the camera module 100 is disposed in the housing 200, and the camera module 100 can be used to perform a shooting function. For example, in some embodiments, the camera module 100 can perform the function of a front camera, and a user can perform operations such as self-shooting, video call, and the like through the camera module 100. In other embodiments, the camera module 100 can perform a function of a rear camera, and a user can perform operations such as close-range shooting, long-range shooting, and video recording through the camera module 100. In other embodiments, the terminal device 10 may be a tablet computer, a notebook computer, or the like. The present application takes the camera module 100 of a smart phone as an example for description, but it should be understood that the camera module 100 disclosed in the present application is also applicable to other types of terminal devices 10.
Referring to fig. 2, in the first embodiment of the present application, the camera module 100 includes a base 110, a liquid lens 120, a pressing structure 130, an image sensor 140, and a lens group 150. The liquid lens 120, the pressing structure 130, the image sensor 140 and the lens group 150 are mounted on the base 110, and are positioned, supported and protected by the base 110. The image sensor 140 is connected to the base 110, and the lens assembly 150 is connected to the base 110 and located between the liquid lens 120 and the image sensor 140. The pressing structure 130 is connected to the base 110 and can press the liquid lens 120 to deform the liquid lens 120. The ambient light can be incident on the liquid lens 120, and pass through the liquid lens 120 and the lens group 150 to be incident on the image sensor 140, and the ambient light signal is converted into an electrical signal, which is further processed to form an image of the object.
Referring to fig. 3, in the second embodiment of the present application, the camera module 100 includes a base 110, a liquid lens 120, a pressing structure 130, an image sensor 140, and a lens group 150. The liquid lens 120, the pressing structure 130, the image sensor 140 and the lens group 150 are mounted on the base 110, and are positioned, supported and protected by the base 110. The image sensor 140 is connected to the base 110, and the liquid lens 120 is connected to the base 110 and located between the lens set 150 and the image sensor 140. The pressing structure 130 is connected to the base 110 and can press the liquid lens 120 to deform the liquid lens 120. The ambient light can enter the lens assembly 150, pass through the lens assembly 150 and the liquid lens 120, and enter the image sensor 140, so as to convert the ambient light signal into an electrical signal, and form an image of the object after further processing.
Of course, in other embodiments, the lens group 150 may include two or more lens units arranged at intervals, each lens unit including more than one lens, and the lenses in the lens units have relatively fixed shapes. The liquid lens 120 may be disposed between any two lens units, and ambient light incident on the camera module 100 may pass through the lens units and the liquid lens 120 and enter the image sensor 140, so as to convert ambient light signals into electrical signals, and further process the electrical signals to form an image of a photographed object.
Referring to fig. 4, 5 and 6, the present application provides a control method of a camera module 100 for controlling the compressive deformation of a liquid lens 120. It is understood that, with the camera module 100 structure described in the above embodiment, the following control method of the camera module 100 is applicable. The control method of the camera module 100 includes the following steps:
s100, a camera module 100 is provided, the camera module 100 includes a base 110, a liquid lens 120, a squeezing structure 130, an image sensor 140 and a lens group 150, the liquid lens 120, the squeezing structure 130 and the image sensor 140 are respectively connected to the base 110, ambient light can penetrate through the lens group 150 and the liquid lens 120 and enter the image sensor 140, the lens group 150 has an optical axis 152, and the squeezing structure 130 includes a first moving portion 131a, a first electric control portion 131b, a second moving portion 133a and a second electric control portion 133 b.
Specifically, the camera module 100 according to the first embodiment of the present application is taken as an example. In some embodiments, the projection of the first and second moving parts 131a and 133a is spaced from the projection of the lens group 150 in the extending direction of the optical axis 152. The first and second moving portions 131a and 133a have a relatively simple structure and are easily assembled and molded. Referring to fig. 7, in other embodiments, in the extending direction of the optical axis 152 of the lens group 150, the projection of the first moving part 131a at least partially overlaps the projection of the lens group 150, and the projection of the second moving part 133a at least partially overlaps the projection of the lens group 150. This kind of structure is favorable to reducing the thickness of camera module 100 in the extending direction of optical axis 152, and then is favorable to the miniaturized design of camera module 100. The first moving portion 131a and the second moving portion 133a are used for pressing the liquid lens 120, so that the liquid lens 120 is deformed and the shape of the light emitting surface is changed, thereby changing the angle of the emitted light. The pressing structure 130 may further include a first elastic sheet 131c and a second elastic sheet, the first elastic sheet 131c is connected to the first moving portion 131a and the base body 110 and is used for returning the first moving portion 131a, and the second elastic sheet is connected to the second moving portion 133a and the base body 110 and is used for returning the second moving portion 133 a. After the first moving portion 131a and the second moving portion 133a move relative to the initial positions, the first elastic piece 131c and the second elastic piece accumulate elastic potential energy, and after the camera module 100 finishes shooting, the first elastic piece 131c and the second elastic piece release the elastic potential energy, so that the first moving portion 131a and the second moving portion 133a can return to the initial positions.
Referring to fig. 5 and 6 in combination with fig. 7, in some embodiments, the pressing structure 130 includes a first magnet 131d and a second magnet 133d mounted on the base 110, the first electric control part 131b includes a first coil located in a magnetic field of the first magnet 131d, the second electric control part 133b includes a second coil located in a magnetic field of the second magnet 133d, the first coil is connected to the first moving part 131a, and the second coil is connected to the second moving part 133 a. When the first coil is energized, the first magnet 131d receives a force in the magnetic field, and the first moving portion 131a is driven to move to press the liquid lens 120. Similarly, when the second coil is energized, the force is applied to the magnetic field of the second magnet 133d, and the second moving portion 133a is moved to squeeze the liquid lens 120.
In other embodiments, the first moving portion 131a includes a first piezoelectric body, the first electronic control portion 131b includes a first electrode connected to the first piezoelectric body, the second moving portion 133a includes a second piezoelectric body, and the second electronic control portion 133b includes a second electrode connected to the second piezoelectric body. The first electrode can provide an electric field when energized to locally deform the first moving portion 131a and press the liquid lens 120, and the second electrode can also provide an electric field when energized to locally deform the second moving portion 133a and press the liquid lens 120.
Referring to fig. 5 and 6, the pressing structure 130 may further include a third moving portion 135a, a third electronic control portion 135b, a fourth moving portion 137a, and a fourth electronic control portion 137b, the structures of the third moving portion 135a and the fourth moving portion 137a may refer to the first moving portion 131a and the second moving portion 133a, and the structures of the third electronic control portion 135b and the fourth electronic control portion 137b may refer to the first electronic control portion 131b and the second electronic control portion 133b, which are not described herein again. The fourth moving portion 137a and the second moving portion 133a are provided on the first shaft 101, and the third moving portion 135a and the first moving portion 131a are provided on the second shaft 103. The first moving portion 131a and the third moving portion 135a may be provided as one set, and the second moving portion 133a and the fourth moving portion 137a may be provided as another set, so as to control the deflections of the liquid lens 120 about the first axis 101 and the second axis 103, respectively. Of course, the first moving part 131a and the third moving part 135a may also make the deformation of the liquid lens 120 to be centrosymmetric about the optical axis 152 for focusing the camera module 100; the second moving portion 133a and the fourth moving portion 137a may also make the deformation of the liquid lens 120 be centrosymmetric about the optical axis 152, so as to be used for focusing the camera module 100. Of course, in the embodiment shown in fig. 5 and 6, the camera module 100 may include a third magnet 135d and a fourth magnet 137d, where the third magnet 135d is disposed corresponding to the third electric control portion 135b, and the fourth magnet 137d is disposed corresponding to the fourth electric control portion 137b, which will not be described herein again.
Further, referring to fig. 7, the first moving part 131a, the second moving part 133a, the third moving part 135a, and the fourth moving part 137a are movable in the extending direction of the optical axis 152, respectively. Further, referring to fig. 5 and 6, the first moving portion 131a and the third moving portion 135a are centrosymmetric with respect to the optical axis 152, and the second moving portion 133a and the fourth moving portion 137a are centrosymmetric with respect to the optical axis 152. With this arrangement, the first axis 101 and the second axis 103 intersect with the optical axis 152, and the first moving part 131a, the third moving part 135a, the second moving part 133a, and the fourth moving part 137a are arranged symmetrically, so that the structure of the camera module 100 can be simplified, and the control of the camera module 100 can be simplified.
Further, in the embodiment shown in fig. 5 and 6, the first moving portion 131a, the second moving portion 133a, the third moving portion 135a, and the fourth moving portion 137a are sequentially disposed in the circumferential direction of the lens group 150, and the first shaft 101 and the second shaft 103 are perpendicular to each other. That is, the included angles between the first moving portion 131a and the second and fourth moving portions 133a and 137a are 90 degrees, respectively, and the included angles between the third moving portion 135a and the second and fourth moving portions 133a and 137a are 90 degrees, respectively. With this arrangement, a rectangular coordinate system can be established with the first axis 101 as the X axis, the second axis 103 as the Y axis, and the optical axis 152 of the camera module 100 as the Z axis, so that the camera module 100 can be easily controlled for anti-shake and focusing. In this embodiment, the first axis 101 and the second axis 103 are fixed in position relative to each other, and therefore, it is easier to control the deflection of the liquid lens 120 about the first axis 101 and the second axis 103.
Of course, it is understood that there may be more moving portions to form more points of application of force on the liquid lens 120 to more precisely control the deformation of the liquid lens 120. Of course, it is understood that the third moving unit 135a and the fourth moving unit 137a are not essential and thus may be omitted, and the positions of the first shaft 101 and the second shaft 103 may not be fixed after the third moving unit 135a and the fourth moving unit 137a are omitted.
Focusing and anti-shake control of the camera module 100 will be described below by taking an example in which the camera module 100 includes the first moving part 131a, the second moving part 133a, the third moving part 135a, and the fourth moving part 137 a.
S210, the first electrical control portion 131b is powered on to drive the first moving portion 131a to move and squeeze the liquid lens 120, and the third electrical control portion 135b is powered on to drive the third moving portion 135a to move and squeeze the liquid lens 120, so that the deformation of the liquid lens 120 is centrosymmetric with respect to the optical axis 152.
The liquid lens 120 includes a liquid coated in a flexible film, and after the first moving portion 131a and the third moving portion 135a move and press the liquid lens 120, the liquid in the liquid lens 120 flows and deforms, and the liquid near the pressed position gathers, so that the shape of the light emitting surface of the liquid lens 120 changes. Since the deformation of the liquid lens 120 is centrosymmetric about the optical axis 152, the focal length of the liquid lens 120 can be adjusted to meet the focusing requirement of the camera module 100. Of course, step S210 may be omitted.
S220, the first electric control portion 131b is powered on to drive the first moving portion 131a to move and press the liquid lens 120, so that the light emitting surface of the liquid lens 120 deflects around the first axis 101.
Specifically, the terminal device 10 includes a gyroscope, and the gyroscope can detect the shake amount of the terminal device 10 when the terminal device 10 shakes during shooting by the user using the camera module 100. After the first moving portion 131a moves and presses the liquid lens 120, the liquid in the liquid lens 120 is deformed by flowing, and the liquid near the pressed position is gathered, so that the light emitting surface of the liquid lens 120 is deflected around the first axis 101. The terminal device 10 may adjust the deflection of the liquid lens 120 in the first axis 101 according to the shake amount, so as to compensate for the shake of the camera module 100, so as to reduce the influence of the shake of the terminal device 10 on the image formation, and further obtain a higher quality image.
Further, in the step of deflecting the light exit surface of the liquid lens 120 around the first axis 101, the following steps may be further included:
s221, the third electronic control unit 135b is powered on to drive the third moving unit 135a to move and squeeze the liquid lens 120.
It can be understood that the third electrical control portion 135b may not be powered during the process of implementing the anti-shake of the first axis 101 by the camera module 100, that is, the third moving portion 135a may not apply pressure on the liquid lens 120. The liquid lens 120 can be deflected about the first axis 101 by the pressing force of the first moving portion 131 a. Of course, when the third electronic control unit 135b is powered on, the third moving unit 135a and the first moving unit 131a have different extrusion deformation amounts to the liquid lens 120, so that the light emitting surface of the liquid lens 120 can be deflected around the first axis 101, and the anti-shake function of the camera module 100 in the first axis 101 is further achieved. Under the condition that the first electric control part 131b and the third electric control part 135b are respectively electrified to apply the squeezing action to the liquid lens, the deflection of the light-emitting surface of the liquid lens is easy to obtain higher control precision, so as to improve the shooting performance of the camera module 100.
It can be understood that, during the focusing process of the camera module 100, the following steps may also be adopted:
s310, the first electric control unit 131b, the second electric control unit 133b, the third electric control unit 135b, and the fourth electric control unit 137b are respectively powered on to respectively drive the first moving unit 131a, the second moving unit 133a, the third moving unit 135a, and the fourth moving unit 137a to move and squeeze the liquid lens 120, so that the deformation of the liquid lens 120 is centrosymmetric with respect to the optical axis 152.
The liquid lens 120 includes a liquid coated in a flexible film, and when the first moving portion 131a, the second moving portion 133a, the third moving portion 135a, and the fourth moving portion 137a move and press the liquid lens 120, the liquid in the liquid lens 120 flows and deforms, and the liquid near the pressed position gathers, so that the shape of the light exit surface of the liquid lens 120 changes. Since the deformation of the liquid lens 120 is centrosymmetric about the optical axis 152, the focal length of the liquid lens 120 can be adjusted to meet the focusing requirement of the camera module 100. Since the first moving portion 131a, the second moving portion 133a, the third moving portion 135a, and the fourth moving portion 137a all press the liquid lens 120, when the force is applied to multiple points, the deformation of the liquid lens 120 is easily controlled, and high control accuracy can be obtained. Of course, step S310 may be omitted.
S320, the second electric control portion 133b is powered on to drive the second moving portion 133a to move and press the liquid lens 120, so that the light emitting surface of the liquid lens 120 deflects around the second axis 103.
The terminal device 10 includes a gyroscope that can detect the amount of shake of the terminal device 10 when the terminal device 10 generates shake during shooting by the user. After the second moving portion 133a moves and presses the liquid lens 120, the liquid in the liquid lens 120 flows and deforms, and the liquid near the pressed position gathers, so that the light emitting surface of the liquid lens 120 deflects around the second axis 103. The terminal device 10 may adjust the deflection of the liquid lens 120 on the second axis 103 according to the shake amount, so as to compensate for the shake of the camera module 100, so as to reduce the influence of the shake of the terminal device 10 on the image formation, and further obtain a higher quality image. It can be understood that the first electric control unit 131b and the second electric control unit 133b may be powered on simultaneously, or one of them may be powered on first and the other powered on later.
Further, the step of deflecting the light exit surface of the liquid lens 120 around the second axis 103 may include the steps of:
s321, the fourth electric control portion 137b is powered on to drive the fourth moving portion 137a to move and squeeze the liquid lens 120.
It can be understood that, in the process of implementing the anti-shake of the second shaft 103 by the camera module 100, the fourth electric control portion 137b may not be powered, that is, the fourth moving portion 137a may not apply pressure to the liquid lens 120. The liquid lens 120 can be deflected about the second axis 103 by the pressing force of the second moving portion 133 a. Of course, when the fourth electronic control unit 137b is powered on, the fourth moving unit 137a and the second moving unit 133a have different extrusion deformation amounts to the liquid lens 120, so that the light emitting surface of the liquid lens 120 can be deflected around the second axis 103, and the anti-shake function of the camera module 100 on the second axis 103 is further achieved. Under the condition that the second electric control part 133b and the fourth electric control part 137b are respectively electrified to apply a squeezing action to the liquid lens, the deflection of the light-emitting surface of the liquid lens 120 is easy to obtain higher control precision, so as to improve the shooting performance of the camera module 100.
Referring to fig. 8, fig. 8 is a schematic structural diagram of the terminal device 10 provided in the present application. The terminal device 10 may include a Radio Frequency (RF) circuit 501, a memory 502 including one or more computer-readable storage media, an input unit 503, a display unit 504, a sensor 505, an audio circuit 506, a wireless fidelity (WiFi) module 507, a processor 508 including one or more processing cores, and a power supply 509. Those skilled in the art will appreciate that the terminal device 10 configuration shown in fig. 8 does not constitute a limitation of the terminal device 10 and may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components.
The rf circuit 501 may be used for receiving and transmitting information, or receiving and transmitting signals during a call, and in particular, receives downlink information of a base station and then sends the received downlink information to one or more processors 508 for processing; in addition, data relating to uplink is transmitted to the base station. In general, radio frequency circuit 501 includes, but is not limited to, an antenna, at least one Amplifier, a tuner, one or more oscillators, a Subscriber Identity Module (SIM) card, a transceiver, a coupler, a Low Noise Amplifier (LNA), a duplexer, and the like. In addition, the radio frequency circuit 501 may also communicate with a network and other devices through wireless communication. The wireless communication may use any communication standard or protocol, including but not limited to Global System for Mobile communications (GSM), General Packet Radio Service (GPRS), Code Division Multiple Access (CDMA), Wideband Code Division Multiple Access (WCDMA), Long Term Evolution (LTE), email, Short Message Service (SMS), and the like.
The memory 502 may be used to store applications and data. Memory 502 stores applications containing executable code. The application programs may constitute various functional modules. The processor 508 executes various functional applications and data processing by executing application programs stored in the memory 502. The memory 502 may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application program required by at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the terminal device 10, and the like. Further, the memory 502 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device. Accordingly, the memory 502 may also include a memory controller to provide the processor 508 and the input unit 503 access to the memory 502.
The input unit 503 may be used to receive input numbers, character information, or user characteristic information (such as a fingerprint), and generate a keyboard, mouse, joystick, optical, or trackball signal input related to user setting and function control. In particular, in one particular embodiment, the input unit 503 may include a touch-sensitive surface as well as other input devices. The touch-sensitive surface, also referred to as a touch display screen or a touch pad, may collect touch operations by a user (e.g., operations by a user on or near the touch-sensitive surface using a finger, a stylus, or any other suitable object or attachment) thereon or nearby, and drive the corresponding connection device according to a predetermined program. Alternatively, the touch sensitive surface may comprise two parts, a touch detection means and a touch controller. The touch detection device detects the touch direction of a user, detects a signal brought by touch operation and transmits the signal to the touch controller; the touch controller receives touch information from the touch sensing device, converts the touch information into touch point coordinates, sends the touch point coordinates to the processor 508, and can receive and execute commands sent by the processor 508.
The display unit 504 may be used to display information input by or provided to the user and various graphical user interfaces of the terminal device 10, which may be made up of graphics, text, icons, video, and any combination thereof. The display unit 504 may include a display panel. Alternatively, the display panel may be configured in the form of a Liquid Crystal Display (LCD), an Organic Light-Emitting Diode (OLED), or the like. Further, the touch-sensitive surface may overlay the display panel, and when a touch operation is detected on or near the touch-sensitive surface, the touch operation is transmitted to the processor 508 to determine the type of touch event, and then the processor 508 provides a corresponding visual output on the display panel according to the type of touch event. Although in FIG. 8 the touch sensitive surface and the display panel are two separate components to implement input and output functions, in some embodiments the touch sensitive surface may be integrated with the display panel to implement input and output functions.
The terminal device 10 may also include at least one sensor 505, such as light sensors, motion sensors, and other sensors. Specifically, the light sensor may include an ambient light sensor that adjusts the brightness of the display panel according to the brightness of ambient light, and a proximity sensor that turns off the display panel and/or the backlight when the terminal device 10 is moved to the ear. As one of the motion sensors, the gravity acceleration sensor can detect the magnitude of acceleration in each direction (generally, three axes), can detect the magnitude and direction of gravity when the mobile phone is stationary, and can be used for applications of recognizing the posture of the mobile phone (such as horizontal and vertical screen switching, related games, magnetometer posture calibration), vibration recognition related functions (such as pedometer and tapping), and the like; as for other sensors such as a gyroscope, a barometer, a hygrometer, a thermometer, and an infrared sensor, which can be configured in the terminal device 10, detailed description thereof is omitted.
The audio circuit 506 may provide an audio interface between the user and the terminal device 10 through a speaker, microphone. The audio circuit 506 can convert the received audio data into an electrical signal, transmit the electrical signal to a speaker, and convert the electrical signal into a sound signal to output; on the other hand, the microphone converts the collected sound signal into an electric signal, which is received by the audio circuit 506 and converted into audio data, and then the audio data is processed by the audio data output processor 508, and then the audio data is sent to, for example, another terminal device 10 via the radio frequency circuit 501, or the audio data is output to the memory 502 for further processing. The audio circuitry 506 may also include an earphone jack to provide communication of a peripheral earphone with the terminal device 10.
Wireless fidelity (WiFi) belongs to short-range wireless transmission technology, and the terminal device 10 can help the user send and receive e-mail, browse web pages, access streaming media and the like through the wireless fidelity module 507, and provides wireless broadband internet access for the user. Although fig. 8 shows the wireless fidelity module 507, it is understood that it does not belong to the essential constitution of the terminal device 10, and may be omitted entirely as needed within the scope not changing the essence of the invention.
The processor 508 is a control center of the terminal device 10, connects various parts of the entire terminal device 10 with various interfaces and lines, and performs various functions of the terminal device 10 and processes data by running or executing an application program stored in the memory 502 and calling up data stored in the memory 502, thereby performing overall monitoring of the terminal device 10. Optionally, processor 508 may include one or more processing cores; preferably, the processor 508 may integrate an application processor, which primarily handles operating systems, user interfaces, application programs, etc., and a modem processor, which primarily handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into the processor 508.
The terminal device 10 also includes a power supply 509 to supply power to the various components. Preferably, the power supply 509 may be logically connected to the processor 508 through a power management system, so that the power management system may manage charging, discharging, and power consumption. The power supply 509 may also include any component such as one or more dc or ac power sources, recharging systems, power failure detection circuitry, power converters or inverters, power status indicators, and the like.
Although not shown in fig. 8, the terminal device 10 may further include a bluetooth module or the like, which is not described in detail herein. In specific implementation, the above modules may be implemented as independent entities, or may be combined arbitrarily to be implemented as the same or several entities, and specific implementation of the above modules may refer to the foregoing method embodiments, which are not described herein again.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (12)
1. A control method of a camera module is characterized by comprising the following steps:
providing a camera module, wherein the camera module comprises a base body, a lens group, a liquid lens, an extrusion structure and an image sensor, the lens group, the liquid lens, the extrusion structure and the image sensor are respectively connected with the base body, ambient light can penetrate through the lens group and the liquid lens and enter the image sensor, and the lens group is provided with an optical axis; the extrusion structure comprises a first moving part, a first electric control part, a second moving part and a second electric control part;
the first electric control part is connected with a power supply to drive the first moving part to move and extrude the liquid lens so as to deflect the light emitting surface of the liquid lens around a first axis;
the second electric control part is connected with a power supply to drive the second moving part to move and extrude the liquid lens so as to deflect the light emitting surface of the liquid lens around a second shaft;
the first axis and the second axis are perpendicular to the optical axis respectively.
2. The method according to claim 1, wherein the pressing structure includes a third moving portion and a third electric control portion, the third moving portion is disposed on the second axis opposite to the first moving portion, and in the step of deflecting the light emitting surface of the liquid lens around the first axis, the method further includes:
the third electric control part is connected with a power supply to drive the third moving part to move and extrude the liquid lens.
3. The method of claim 2, further comprising, prior to the step of deflecting the light exit surface of the liquid lens about the first axis:
the first electric control part is powered on to drive the first moving part to move and extrude the liquid lens, and the third electric control part is powered on to drive the third moving part to move and extrude the liquid lens, so that the deformation of the liquid lens is centrosymmetric about the optical axis.
4. The method according to claim 2, wherein the camera module includes a fourth moving portion and a fourth electric control portion, the fourth moving portion and the second moving portion are disposed on the first axis, and the step of deflecting the light emitting surface of the liquid lens around the second axis further includes:
the fourth electric control part is connected with a power supply to drive the fourth moving part to move and extrude the liquid lens.
5. The method of claim 4, further comprising, prior to the step of deflecting the light exit surface of the liquid lens about the first axis:
the first electric control part, the second electric control part, the third electric control part and the fourth electric control part are respectively connected with a power supply to respectively drive the first moving part, the second moving part, the third moving part and the fourth moving part to move and extrude the liquid lens, so that the deformation of the liquid lens is centrosymmetric about the optical axis.
6. The control method according to claim 4, wherein the first moving portion, the second moving portion, the third moving portion, and the fourth moving portion are movable in an extending direction of the optical axis, respectively.
7. The control method according to claim 4, wherein the first moving portion and the third moving portion are centrosymmetric with respect to the optical axis, and the second moving portion and the fourth moving portion are centrosymmetric with respect to the optical axis.
8. The control method according to claim 7, wherein the first moving portion, the second moving portion, the third moving portion, and the fourth moving portion are provided in this order in a circumferential direction of the lens group, and the first axis and the second axis are perpendicular to each other.
9. The control method according to any one of claims 1 to 8, wherein the lens group is located between the liquid lens and the image sensor; or the liquid lens is located between the lens group and the image sensor.
10. The control method according to any one of claims 1 to 8, wherein projections of the first moving portion and the second moving portion are provided at intervals from a projection of the lens group in the optical axis extending direction; or in the extending direction of the optical axis of the lens group, the projection of the first moving part at least partially overlaps with the projection of the lens group, and the projection of the second moving part at least partially overlaps with the projection of the lens group.
11. The control method according to any one of claims 1 to 8, wherein the pressing structure includes a first elastic piece and a second elastic piece, the first elastic piece is connected with the first moving portion and the base body and used for returning the first moving portion, and the second elastic piece is connected with the second moving portion and the base body and used for returning the second moving portion.
12. The control method according to claim 11, characterized by comprising any one of the following:
the extrusion structure comprises a first magnet and a second magnet which are arranged on the seat body, the first electric control part comprises a first coil positioned in the magnetic field of the first magnet, the second electric control part comprises a second coil positioned in the second magnetic field, the first coil is connected with the first moving part, and the second coil is connected with the second moving part;
the first moving portion includes a first piezoelectric body, the first electric control portion includes a first electrode connected to the first piezoelectric body, the second moving portion includes a second piezoelectric body, and the second electric control portion includes a second electrode connected to the second piezoelectric body.
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