CN113572938A - Camera module and electronic equipment - Google Patents
Camera module and electronic equipment Download PDFInfo
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- CN113572938A CN113572938A CN202110866550.1A CN202110866550A CN113572938A CN 113572938 A CN113572938 A CN 113572938A CN 202110866550 A CN202110866550 A CN 202110866550A CN 113572938 A CN113572938 A CN 113572938A
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- 239000003990 capacitor Substances 0.000 claims abstract description 27
- 230000003287 optical effect Effects 0.000 claims abstract description 26
- 230000033001 locomotion Effects 0.000 claims description 18
- 239000002184 metal Substances 0.000 claims description 11
- 230000000712 assembly Effects 0.000 claims description 8
- 238000000429 assembly Methods 0.000 claims description 8
- 239000011248 coating agent Substances 0.000 claims description 5
- 238000000576 coating method Methods 0.000 claims description 5
- 230000009286 beneficial effect Effects 0.000 abstract description 5
- 230000009467 reduction Effects 0.000 abstract description 4
- 238000001514 detection method Methods 0.000 description 21
- 238000000034 method Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 206010070834 Sensitisation Diseases 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 238000007747 plating Methods 0.000 description 2
- 230000008313 sensitization Effects 0.000 description 2
- 238000012935 Averaging Methods 0.000 description 1
- 206010044565 Tremor Diseases 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
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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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- 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
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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
- G03B17/00—Details of cameras or camera bodies; Accessories therefor
- G03B17/02—Bodies
- G03B17/12—Bodies with means for supporting objectives, supplementary lenses, filters, masks, or turrets
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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
- G03B5/06—Swinging lens about normal to the optical axis
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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
- H04N23/57—Mechanical or electrical details of cameras or camera modules specially adapted for being embedded in other devices
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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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- 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
- G03B2205/00—Adjustment of optical system relative to image or object surface other than for focusing
- G03B2205/0007—Movement of one or more optical elements for control of motion blur
- G03B2205/0015—Movement of one or more optical elements for control of motion blur by displacing one or more optical elements normal to the optical axis
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Studio Devices (AREA)
- Adjustment Of Camera Lenses (AREA)
Abstract
The embodiment of the invention relates to the technical field of camera products, and discloses a camera module and electronic equipment, wherein the camera module comprises a base, a lens component, a photosensitive component, a driving component and at least two groups of electrode plates; the lens component is arranged on the base; the photosensitive assembly is movably arranged on the base; the driving assembly is arranged on the base, connected with the photosensitive assembly and used for driving the photosensitive assembly to move on the base; each group of electrode plates comprises a first electrode plate arranged on the lens assembly and a second electrode plate arranged on the photosensitive assembly, and the second electrode plate of each group of electrode plates and the first electrode plate of the group of electrode plates are oppositely arranged in the optical axis direction of the lens assembly to form a capacitor. The camera module and the electronic equipment provided by the embodiment of the invention not only can save the internal space of the camera module, but also are beneficial to the miniaturization of the camera module and the reduction of the cost of the camera module.
Description
Technical Field
The embodiment of the invention relates to the technical field of camera products, in particular to a camera module and electronic equipment.
Background
At present, most camera modules on electronic equipment have an optical anti-shake function, and an optical anti-shake technology compensates a light path during shaking through movement of a lens or movement of a photosensitive element, so that the imaging quality of the camera modules is improved. Along with the camera lens size in the camera module increases, and weight rises, and the degree of difficulty of moving the camera lens is bigger and bigger, and photosensitive element is because the size is less, and weight is lighter, realizes through removing photosensitive element that optics is preventing trembling and is receiving more and more attention.
In some camera modules which use a movable photosensitive element to realize optical anti-shake, in order to achieve faster and more stable focusing, a hall sensor or a driving chip with a hall sensor detection function is usually arranged in the camera module, and a corresponding magnet for detection is arranged in the camera module to detect the moving position of the photosensitive element, so that closed-loop control is realized when the photosensitive element is driven to move, and the aim of stably and quickly controlling the camera module to focus is achieved. However, the internal space of the camera module is occupied, the miniaturization of the camera module is not facilitated, the cost of the Hall device is high, and the reduction of the cost of the camera module is not facilitated.
Disclosure of Invention
An object of the embodiments of the present invention is to provide a camera module and an electronic device, which can save an internal space of the camera module, and is beneficial to miniaturization of the camera module, and also beneficial to reduction of cost of the camera module.
In order to solve the above technical problem, an embodiment of the present invention provides a camera module, including:
a base;
the lens assembly is arranged on the base;
the photosensitive assembly is movably arranged on the base;
the driving assembly is arranged on the base, connected with the photosensitive assembly and used for driving the photosensitive assembly to move on the base;
the second electrode plate of each group of electrode plates and the first electrode plate of the group of electrode plates are oppositely arranged in the optical axis direction of the lens assembly to form a capacitor, and the size of the capacitor is changed along with the movement of the photosensitive assembly in the direction perpendicular to the optical axis direction of the lens assembly;
the driving component controls the movement of the photosensitive component according to the size of the capacitor.
The embodiment of the invention also provides electronic equipment which comprises the camera module.
Compared with the prior art, the embodiment of the invention provides a camera module which is beneficial to miniaturization and cost reduction, when the driving component drives the photosensitive component to move to realize optical anti-shake, the second electrode plate of each group of electrode plates can move along with the movement of the photosensitive component, this changes the size of the capacitance formed by the opposing arrangement of the first and second electrode plates in each set of electrode plates, the arrangement of at least two groups of electrode plates can realize the position detection of two different directions of the moving plane where the photosensitive component is positioned, the arrangement of the driving component can control the movement of the photosensitive component according to the size of the capacitor, the drive assembly can control the drive process through the detected capacitance while driving the photosensitive assembly to move, thereby realizing closed-loop control when driving the photosensitive assembly to move. Therefore, the camera module provided by the embodiment of the invention only needs to be internally provided with at least two groups of electrode plates, each group of electrode plates comprises a first electrode plate and a second electrode plate, the position detection of the photosensitive assembly can be realized when the photosensitive assembly is driven to move by detecting the size of the capacitor formed by the first electrode plate and the second electrode plate, the electrode plates occupy less space and are low in price, the internal space of the camera module can be saved, the miniaturization of the camera module is facilitated, and the cost of the camera module is reduced.
In addition, the at least two groups of electrode plates are arranged around the optical axis of the lens assembly. Like this, can utilize the inner space of camera module, set up more multiunit's plate electrode through the optical axis that encircles the camera lens subassembly, obtain a plurality of capacitance signal's detection data to improve the accuracy when detecting the position of sensitization subassembly.
In addition, in each group of the electrode plates, a plurality of second electrode plates are arranged opposite to the same first electrode plate, or a plurality of first electrode plates are arranged opposite to the same second electrode plate. Therefore, by arranging a plurality of second electrode plates in each group of electrode plates to be opposite to the same first electrode plate, or arranging a plurality of first electrode plates to be opposite to the same second electrode plate, a plurality of capacitance signals formed by the plurality of second electrode plates opposite to the same first electrode plate, or the plurality of first electrode plates opposite to the same second electrode plate can be used for obtaining a differential signal of the capacitance signals, so that the robustness of the detection system is improved.
In addition, the lens subassembly include with motor support that the base is connected and with the camera lens that motor support is connected, every group the first electrode board of electrode board is for setting up stator metal sheet on the motor support, or electroplate in the conductive coating on the motor support.
In addition, the photosensitive assembly comprises an image sensor and a circuit board connected with the image sensor, the circuit board is movably arranged on the base, and the second electrode plate of each group of electrode plates is a rotor metal plate arranged on the circuit board or a conductive coating electroplated on the circuit board.
In addition, the driving assembly comprises a magnetic part and an electromagnetic coil, the magnetic part is arranged on the base, and the electromagnetic coil is arranged on the photosensitive assembly and is opposite to the magnetic part. Therefore, after the electromagnetic coil is electrified, electromagnetic acting force is generated between the electromagnetic coil and the magnetic piece, and the photosensitive assembly is driven to move on the base.
In addition, the driving assembly is provided in plurality, and the plurality of driving assemblies are arranged around the optical axis of the lens assembly. Therefore, the acting force applied to the photosensitive assembly can be more balanced through the plurality of driving assemblies.
In addition, still include a plurality of balls, a plurality of balls set up on the base, and bearing the sensitization subassembly.
In addition, still include a plurality of elastic components, every the elastic component is connected respectively the base with photosensitive assembly.
Drawings
One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the figures in which like reference numerals refer to similar elements and which are not to scale unless otherwise specified.
Fig. 1 is a schematic top view of a camera module according to an embodiment of the present invention;
FIG. 2 is a schematic sectional view taken along the line A-A in FIG. 1;
fig. 3 is a schematic diagram illustrating a distribution structure of four first electrode plates according to an embodiment of the present invention;
fig. 4 is a schematic view of another distribution structure of four first electrode plates according to an embodiment of the present invention;
fig. 5 is a schematic diagram of a distribution structure of two first electrode plates according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a same first electrode plate and two second electrode plates which are oppositely arranged according to an embodiment of the present invention;
FIG. 7 is a schematic diagram of a capacitive signal detection structure according to an embodiment of the present invention;
FIG. 8 is a schematic cross-sectional view along the direction B-B of the camera module shown in FIG. 1 with balls;
fig. 9 is a schematic sectional view along the direction B-B when the elastic member is disposed in the camera module shown in fig. 1.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, it will be appreciated by those of ordinary skill in the art that numerous technical details are set forth in order to provide a better understanding of the present application in various embodiments of the present invention. However, the technical solution claimed in the present application can be implemented without these technical details and various changes and modifications based on the following embodiments. The following embodiments are divided for convenience of description, and should not constitute any limitation to the specific implementation manner of the present invention, and the embodiments may be mutually incorporated and referred to without contradiction.
The embodiment of the present invention relates to a camera module, as shown in fig. 1 and fig. 2, the camera module includes a base 10, a lens assembly 20, a photosensitive assembly 30, a driving assembly 40 (shown in fig. 8 and fig. 9), and at least two sets of electrode plates 50. The base 10 is a fixed base of the camera module, and the lens assembly 20 is arranged on the base 10; the photosensitive assembly 30 is movably disposed on the base 10; the driving assembly 40 is arranged on the base 10, connected with the photosensitive assembly 30 and used for driving the photosensitive assembly 30 to move on the base 10; each set of electrode plates 50 includes a first electrode plate 51 disposed on the lens assembly 20 and a second electrode plate 52 disposed on the photosensitive assembly 30, the second electrode plate 52 of each set of electrode plates 50 and the first electrode plate 51 of the set of electrode plates 50 are disposed opposite to each other in the direction of the optical axis S of the lens assembly 20 to form a capacitor, and the size of the capacitor varies with the movement of the photosensitive assembly 30 in the direction perpendicular to the optical axis S of the lens assembly 20; the driving assembly 40 controls the movement of the photosensitive assembly 30 according to the magnitude of the capacitance.
Compared with the prior art, in the camera module according to the first embodiment of the present invention, when the driving assembly 40 drives the photosensitive assembly 30 to move to achieve optical anti-shake, the second electrode plate 52 of each group of electrode plates 50 moves along with the movement of the photosensitive assembly 30, so as to change the size of a capacitor formed by the relative arrangement of the first electrode plate 51 and the second electrode plate 52 in each group of electrode plates 50, and a linear relationship exists between the size of the capacitor and the movement position of the photosensitive assembly 30. Through setting up at least two sets of electrode pads 50, can realize carrying out position detection to two different directions (these two different directions are two anti-shake directions on photosensitive assembly 30 place moving plane) on photosensitive assembly 30 place moving plane, thereby obtain at least two sets of electric capacity signals, drive assembly 40 then can be according to the removal of the size control photosensitive assembly 30 of electric capacity, drive assembly 40 is when drive photosensitive assembly 30 motion promptly, can control the drive process through the electric capacity size that detects, thereby realize closed-loop control when drive photosensitive assembly 30 removes. Thus, the camera module provided by the first embodiment of the present invention only needs to embed at least two sets of electrode plates 50, each set of electrode plates 50 includes the first electrode plate 51 and the second electrode plate 52, and the position detection of the photosensitive assembly 30 can be realized when the photosensitive assembly 30 is driven to move by detecting the capacitance formed by the first electrode plate 51 and the second electrode plate 52, and the space occupation of the first electrode plate 51 and the second electrode plate 52 is small and the price is low, so that not only can the internal space of the camera module be saved, but also the miniaturization of the camera module is facilitated, and the cost of the camera module is facilitated to be reduced.
Meanwhile, compared with the mode of detecting the magnetic induction intensity in the prior art, the camera module provided by the embodiment of the invention adopts the mode of detecting the capacitor, so that the camera module can be prevented from being easily interfered by an external magnetic field, and the closed-loop control precision when the photosensitive assembly 30 is driven to move is prevented from being influenced.
It should be noted that, here, the second electrode plate 52 of each group of electrode plates 50 is displaced when moving along with the photosensitive assembly 30, and the first electrode plate 51 of each group of electrode plates 50 is fixed on the lens assembly 20, so that, when the second electrode plate 52 of each group of electrode plates 50 is displaced, the area of the second electrode plate 52 relative to the first electrode plate 51 of the group of electrode plates 50 is correspondingly changed, thereby changing the size of the capacitance formed by the first electrode plate 51 and the second electrode plate 52 in each group of electrode plates 50. For example, when the driving module 40 controls the photosensitive module 30 to move to a predetermined position along the x-axis (the predetermined position is obtained by a controller of an electronic device for anti-shake purposes) to achieve optical anti-shake, the second electrode plate 52 of each group of electrode plates 50 also undergoes position variation along the x-axis, so as to change the relative area with the first electrode plate 51 of the group of electrode plates 50, and by detecting the capacitance formed by the first electrode plate 51 and the second electrode plate 52 in each group of electrode plates 50 after the relative area is changed, data of the position variation of the second electrode plate 52 of each group of electrode plates 50 can be obtained (the data is obtained according to the linear relationship between the capacitance and the relative area). Because the second electrode plate 52 of each group of electrode plates 50 and the photosensitive assembly 30 move synchronously, the data can reflect the information of the position movement of the photosensitive assembly 30 synchronously, so that whether the photosensitive assembly 30 moves to a preset position can be judged according to the information, and closed-loop control is realized by detecting the position information of the photosensitive assembly 30 when the driving assembly 40 controls the photosensitive assembly 30 to move, that is, the movement position information of the photosensitive assembly 30 plays a role in correcting the control process of the driving assembly 40, and the driving assembly 40 is ensured to accurately control the photosensitive assembly 30 to move to the preset position. When the driving assembly 40 controls the photosensitive assembly 30 to move along the y-axis to achieve optical anti-shake, the same principle as that the driving assembly 40 controls the photosensitive assembly 30 to move along the x-axis to achieve optical anti-shake is not described herein. When the number of the electrode plates 50 is two, one of the electrode plates 50 can form a capacitance signal reflecting the position variation information of the photosensitive assembly 30 along the x-axis when the photosensitive assembly 30 moves along the x-axis, and the other electrode plate 50 can form a capacitance signal reflecting the position variation information of the photosensitive assembly 30 along the y-axis when the photosensitive assembly 30 moves along the y-axis, so that the position information of the photosensitive assembly 30 on the x-axis or the y-axis can be obtained by detecting the capacitance signals formed by the at least two groups of the electrode plates 50, and further closed-loop control is realized.
In one possible embodiment, in order to ensure the accuracy in detecting the capacitance formed by the first electrode plate 51 and the second electrode plate 52 in each set of electrode plates 50, more sets of electrode plates 50 may be built into the camera module, wherein at least two sets of electrode plates 50 may be disposed around the optical axis S of the lens assembly 20. Like this, utilize the inner space of camera module, set up more electrode plate 50 of multiunit through the optical axis S who encircles lens subassembly 20, can collect a plurality of capacitance signals that detect simultaneously, judge the positional information of photosensitive assembly 30 according to this a plurality of capacitance signals are synthesized, the mode of judgement can be for calculating the average value of these a plurality of capacitance signals, then according to the linear relation between the relative area of first electrode plate 51 and second electrode plate 52 in capacitance signal and the every group electrode plate 50 that corresponds, the positional information of second electrode plate 52 of every group electrode plate 50 is reachd to the average value from this, also obtain the positional information of photosensitive assembly 30. In the process of obtaining the position information of the photosensitive assembly 30 by averaging, errors caused by the detection process can be eliminated to a certain extent, thereby ensuring the accuracy in detecting the position of the photosensitive assembly 30. In other possible embodiments, the accuracy of detecting the position of the photosensitive assembly 30 can also be improved by assigning a weight to each capacitive signal, that is, adding different weight coefficients to each capacitive signal, to assign a greater weight to a capacitive signal with higher detection accuracy, and to assign a smaller weight to a capacitive signal with lower detection accuracy.
As shown in fig. 3 and 4, the number of the electrode plates 50 can be designed to be four, so that four groups of capacitors can be formed in the camera module, and the four groups of capacitors can be distributed along the directions of the x and y axes, and can also be distributed at four corners of the base 10 (here, the base 10 can be rectangular). It should be noted that the distribution positions of the four sets of electrode plates 50 in the camera module are not limited, but only two specific cases thereof are illustrated. By the four groups of capacitors formed by the four groups of electrode plates 50, a differential signal of a capacitance signal can be obtained between every two groups of capacitors, so that the differential processing of the capacitance signal is realized, and the robustness of a system where the capacitance signal detection circuit is located is increased (the robustness refers to the performance of a control system which can keep the quality index unchanged when the characteristics or parameters of the control system perturb). Similarly, there may be two sets of such electrode plates 50, and as shown in fig. 5, the two sets of electrode plates 50 may be arranged along two mutually perpendicular directions, so that a differential signal of the capacitance signal can be obtained through two sets of capacitances formed by the two sets of electrode plates, so as to implement differential processing on the capacitance signal. The two sets of electrode plates 50 may also be arranged in the same direction, and a differential signal of the capacitance signal may be obtained by the two sets of capacitors.
In addition, the differential signal of the capacitance signal can also be obtained by increasing the number of the first electrode plates 51 or the second electrode plates 52 in each set of electrode plates 50. Specifically, there are a plurality of second electrode plates 52 disposed opposite to the same first electrode plate 51 in each group of electrode plates 50, or there are a plurality of first electrode plates 51 disposed opposite to the same second electrode plate 52, so as to implement the detection of the differential signal in each group of electrode plates 50. As shown in fig. 6, there are two second electrode plates 52 in each group of electrode plates 50, which are disposed opposite to the same first electrode plate 51, and the two second electrode plates 52 and the first electrode plate 51 both form a capacitor, so that the two second electrode plates 52 and the first electrode plate 51 in the group of electrode plates 50 generate two capacitor signals, that is, a differential signal can be obtained through the two capacitor signals, thereby implementing differential processing on the capacitor signals.
The first electrode plate 51 and the second electrode plate 52 in each group of electrode plates 50 are arranged in various ways, so that metal plates arranged oppositely can be arranged in the camera module to form a parallel plate capacitor, and a metal conductive area in the camera module can be used for setting capacitance. In a first possible embodiment, the capacitor may be formed by a metal plate built in the camera module, specifically, the lens assembly 20 includes a motor support 21 connected to the base 10 and a lens 22 connected to the motor support 21, and the first electrode plate 51 of each group of electrode plates 50 is a stator metal plate disposed on the motor support 21; the photosensitive assembly 30 includes an image sensor 31 and a circuit board 32 connected to the image sensor 31, the circuit board 32 is movably disposed on the base 10, and the second electrode plate 52 of each set of electrode plates 50 is a mover metal plate disposed on the circuit board 32, so that a capacitor can be formed between the mover metal plate on the circuit board 32 and the stator metal plate on the motor support 21. In a second possible embodiment, the first electrode plate 51 of each set of electrode plates 50 may be a conductive plating layer plated on the motor bracket 21, and the second electrode plate 52 of each set of electrode plates 50 may be a conductive plating layer plated on the circuit board 32, which may also form a capacitor. And through forming electric capacity by the conductive coating, can further save the inner space of camera module, be favorable to the miniaturization of camera module more.
In addition, the detection of the capacitance formed by the first electrode plate 51 and the second electrode plate 52 in each group of electrode plates 50 can be realized by a detection circuit of an electronic device, and signal transmission lines are arranged between the first electrode plate 51 of each group of electrode plates 50 and the detection circuit, and between the second electrode plate 52 of each group of electrode plates 50 and the detection circuit, so that the capacitance signal formed by the first electrode plate 51 and the second electrode plate 52 in each group of electrode plates 50 is transmitted to the detection circuit. As shown in fig. 7, since the second electrode plate 52 of each set of electrode plates 50 is disposed on the circuit board 32, it can be directly wired to the detection circuit of the capacitance signal through the circuit board 32, and the first electrode plate 51 of each set of electrode plates 50 can be wired to the motor pin through the internal circuit of the motor, and then connected to the detection circuit of the capacitance signal through the motor pin. The controller of the electronic device obtains the position information of the second electrode plate 52 of each group of electrode plates 50, i.e. the position information of the photosensitive assembly 30, according to the capacitance signal, so as to control the movement of the photosensitive assembly 30 through the driving assembly 40, thereby achieving the purpose of closed-loop control.
As shown in fig. 8, the lens assembly 20 may further include a lens holder 23 for holding the lens 22, the lens holder 23 is connected to the motor holder 21 via an intermediate member 24, the motor holder 21 is fixed to the housing 11, and the housing 11 is integrally connected to the base 10.
In order to enable the driving assembly 40 disposed on the lens assembly 20 to drive the photosensitive assembly 30 to move on the base 10, various forms are possible. In one possible embodiment, as shown in fig. 8, the driving assembly 40 may include a magnetic member 41 and an electromagnetic coil 42, the magnetic member 41 may be disposed on the base 10, the electromagnetic coil 42 is disposed on the photosensitive assembly 30 and is opposite to the magnetic member 41, and the electromagnetic coil 42 generates an electromagnetic force with the magnetic member 41 after being energized to drive the photosensitive assembly 30 to move on the base 10. The magnetic member 41 may be a magnet disposed on the motor support 21 connected to the base 10, the electromagnetic coil 42 may be disposed on the circuit board 32 of the photosensitive assembly 30 and connected to the circuit on the circuit board 32, and when power is supplied to the electromagnetic coil 42, the electromagnetic coil 42 and the corresponding magnet generate electromagnetic force to drive the circuit board 32 to move in a direction perpendicular to the optical axis S of the lens assembly 20, that is, to drive the photosensitive assembly 30 to move in a direction perpendicular to the optical axis S of the lens assembly 20. In other possible embodiments, the photosensitive assembly 30 may be driven by an ultrasonic motor, memory deformation, or the like.
In one specific embodiment, there may be a plurality of driving assemblies 40, and a plurality of driving assemblies 40 are disposed around the optical axis S of the lens assembly 20. The magnets and corresponding coils are disposed near the corners of the base 10, and the number of such magnets and coils may be four, thereby forming four drive assemblies 40. By means of the four driving assemblies 40, the driving force applied to the photosensitive assembly 30 can be more balanced, so that the movement of the photosensitive assembly 30 is more stable.
Further, a plurality of balls 60 may be provided between the photosensitive element 30 and the base 10, and the photosensitive element 30 may be supported by the plurality of balls 60. As shown in fig. 8, a plurality of balls 60 are located on the base 10, the circuit board 32 of the photosensitive assembly 30 is pressed on the plurality of balls 60, the photosensitive assembly 30 slides with the balls 60 during the moving process, and the balls 60 can slide on the plane of the base 10 at the same time, so that the photosensitive assembly 30 can move on the plane formed by the plurality of balls 60. Here, in order to limit the moving area of the ball 60, a guide rail may be provided on the base 10, and the guide rail may be implemented by forming a groove on the base 10, and placing the ball 60 in the groove, so that the ball 60 does not roll freely on the base 10 and the movement of the photosensitive assembly 30 on the base 10 is not hindered. In order to press the photosensitive assembly 30 onto the plurality of balls 60, a deformable connection member may be disposed between the circuit board 32 of the photosensitive assembly 30 and the base 10.
It should be noted that, the camera module herein can also suspend the photosensitive assembly 30 in the camera module, as shown in fig. 9, a plurality of elastic members 70 are provided between the circuit board 32 of the photosensitive assembly 30 and the base 10, the elastic members 70 may be inverted L-shaped elastic pieces, one end of each elastic member 70 is connected to the circuit board 32 of the photosensitive assembly 30, and the other end of each elastic member 70 is connected to the base 10, so that the photosensitive assembly 30 is suspended in the camera module, when the driving assembly 40 drives the photosensitive assembly 30 to move in a direction perpendicular to the optical axis S of the lens assembly 20, each elastic member 70 is deformed, when the driving force of the driving assembly 40 is removed, each elastic member 70 is automatically restored from the deformed state to the original state, in the process of recovering the elastic members 70 from the deformed state, the photosensitive elements 30 are driven to move, so that the photosensitive elements 30 are recovered to the original state synchronously.
The second embodiment of the present invention provides an electronic device, which includes the camera module in the first embodiment, and at least two sets of electrode plates 50 (shown in fig. 2) are embedded in the camera module, and each set of electrode plate 50 includes a first electrode plate 51 and a second electrode plate 52 which are oppositely arranged, so as to detect the moving position of the photosensitive assembly 30, thereby not only saving the internal space of the camera module, being beneficial to the miniaturization of the camera module, but also reducing the cost of the camera module. The electronic device can be a mobile phone, a tablet computer and other portable terminal devices.
It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific examples for carrying out the invention, and that various changes in form and details may be made therein without departing from the spirit and scope of the invention in practice.
Claims (10)
1. The utility model provides a camera module which characterized in that includes:
a base;
the lens assembly is arranged on the base;
the photosensitive assembly is movably arranged on the base;
the driving assembly is arranged on the base, connected with the photosensitive assembly and used for driving the photosensitive assembly to move on the base;
the second electrode plate of each group of electrode plates and the first electrode plate of the group of electrode plates are oppositely arranged in the optical axis direction of the lens assembly to form a capacitor, and the size of the capacitor is changed along with the movement of the photosensitive assembly in the direction perpendicular to the optical axis direction of the lens assembly;
the driving component controls the movement of the photosensitive component according to the size of the capacitor.
2. The camera module of claim 1, wherein:
the at least two groups of electrode plates are arranged around the optical axis of the lens component.
3. The camera module of claim 1, wherein:
the second electrode plates, which are arranged opposite to the same first electrode plates, in each group of electrode plates are multiple, or the first electrode plates, which are arranged opposite to the same second electrode plates, are multiple.
4. The camera module according to any one of claims 1 to 3, wherein:
the lens assembly comprises a motor support and a lens, the motor support is connected with the base, the lens is connected with the motor support, and the first electrode plate of each electrode plate is a stator metal plate arranged on the motor support or a conductive coating electroplated on the motor support.
5. The camera module according to any one of claims 1 to 3, wherein:
the photosensitive assembly comprises an image sensor and a circuit board connected with the image sensor, the circuit board is movably arranged on the base, and the second electrode plate of each group of electrode plates is a rotor metal plate arranged on the circuit board or a conductive coating electroplated on the circuit board.
6. The camera module of claim 1, wherein:
the drive assembly comprises a magnetic part and an electromagnetic coil, the magnetic part is arranged on the base, and the electromagnetic coil is arranged on the photosensitive assembly and opposite to the magnetic part.
7. The camera module of claim 6, wherein:
the driving assembly is provided with a plurality of driving assemblies, and the plurality of driving assemblies are arranged around the optical axis of the lens assembly.
8. The camera module of claim 1, wherein:
the photosensitive component is characterized by further comprising a plurality of balls, wherein the balls are arranged on the base and bear the photosensitive component.
9. The camera module of claim 1, wherein:
still include a plurality of elastic components, every the elastic component is connected respectively the base with photosensitive assembly.
10. An electronic device, comprising:
the camera module of any one of claims 1 to 9.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110866550.1A CN113572938A (en) | 2021-07-29 | 2021-07-29 | Camera module and electronic equipment |
| JP2022089498A JP7183462B1 (en) | 2021-07-29 | 2022-06-01 | Camera modules and electronics |
| KR1020247004261A KR20240029090A (en) | 2021-07-29 | 2022-06-17 | Camera modules and electronics |
| PCT/CN2022/099637 WO2023005503A1 (en) | 2021-07-29 | 2022-06-17 | Camera module and electronic device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110866550.1A CN113572938A (en) | 2021-07-29 | 2021-07-29 | Camera module and electronic equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113572938A true CN113572938A (en) | 2021-10-29 |
Family
ID=78169174
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110866550.1A Pending CN113572938A (en) | 2021-07-29 | 2021-07-29 | Camera module and electronic equipment |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP7183462B1 (en) |
| KR (1) | KR20240029090A (en) |
| CN (1) | CN113572938A (en) |
| WO (1) | WO2023005503A1 (en) |
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| WO2023005503A1 (en) * | 2021-07-29 | 2023-02-02 | 基合半导体（宁波）有限公司 | Camera module and electronic device |
| WO2023216475A1 (en) * | 2022-05-10 | 2023-11-16 | 基合半导体（宁波）有限公司 | Anti-shake motor, camera module and electronic device |
| WO2023231895A1 (en) * | 2022-05-31 | 2023-12-07 | 维沃移动通信有限公司 | Camera module, control method and apparatus, and electronic device |
| WO2023231896A1 (en) * | 2022-05-31 | 2023-12-07 | 维沃移动通信有限公司 | Camera module, control method and apparatus, and electronic device |
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Also Published As
| Publication number | Publication date |
|---|---|
| JP2023020894A (en) | 2023-02-09 |
| JP7183462B1 (en) | 2022-12-05 |
| KR20240029090A (en) | 2024-03-05 |
| WO2023005503A1 (en) | 2023-02-02 |
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