WO2018141133A1 - 一种摄像模组及移动终端 - Google Patents

一种摄像模组及移动终端 Download PDF

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Publication number
WO2018141133A1
WO2018141133A1 PCT/CN2017/081116 CN2017081116W WO2018141133A1 WO 2018141133 A1 WO2018141133 A1 WO 2018141133A1 CN 2017081116 W CN2017081116 W CN 2017081116W WO 2018141133 A1 WO2018141133 A1 WO 2018141133A1
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WIPO (PCT)
Prior art keywords
lens
permanent magnet
camera module
support plate
liquid
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Application number
PCT/CN2017/081116
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English (en)
French (fr)
Inventor
袁志
靳林芳
康南波
Original Assignee
华为技术有限公司
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to CN201780024145.7A priority Critical patent/CN109073989B/zh
Publication of WO2018141133A1 publication Critical patent/WO2018141133A1/zh

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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
    • G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
    • G03F7/20—Exposure; Apparatus therefor

Definitions

  • the present application relates to the field of camera technologies, and in particular, to a camera module and a mobile terminal.
  • Photographing is one of the important functions of the mobile phone after the call.
  • the photo scene is also the most serious scene of the mobile phone fever problem.
  • the average power consumption of the camera module accounts for about 30% of the power consumption of the whole machine (about 1W). Due to the small size and high power consumption of the module, it is very easy to form a local heating point in the outer casing. The local temperature of the camera module corresponding to the housing position is very high, exceeding the tolerance of the human body.
  • the camera module is generally composed of a main component such as a lens, a voice coil driving device, an image sensor, and a printed circuit board.
  • the voice coil driving device and the image sensor are the main heating devices, and each of them accounts for half of the power consumption of the module.
  • the temperature of the camera module rises, many camera performances are significantly affected, such as focusing speed and image sharpness.
  • the embodiment of the present invention provides a camera module and a mobile terminal, which are used to improve the heat dissipation effect of the camera module and improve the imaging quality of the camera module.
  • a camera module in a first aspect, includes: a substrate, a support plate, a lens assembly, a voice coil driving device, and a housing;
  • the support plate is disposed on the substrate
  • the housing is sealingly connected to the support plate
  • the lens assembly includes: an image sensor and a lens for transmitting light onto the image sensor;
  • the voice coil driving device includes: a permanent magnet fixedly connected to the lens, and an electromagnet coil surrounding the permanent magnet and fixedly connected to the support plate, and the electromagnet coil is supplied when the electromagnet coil is powered a magnetic field formed between the permanent magnet and the driving force or braking force is provided to the lens;
  • the image sensor is disposed between the substrate and the support plate; the lens is located in a space formed by the housing and the sealing plate, and the housing is filled with the lens and the
  • the permanent magnet provides a buoyant liquid.
  • the heat dissipation of the electromagnet coil is facilitated by using an external arrangement of the electromagnet coil, and by using the liquid filled in the casing, the buoyancy of the liquid is used as a force to overcome the gravity of the lens and the permanent magnet. Part or all of the force, and when buoyancy is used, the buoyancy does not change regardless of the position of the lens. Therefore, even if the magnetic force of the electromagnet coil and the permanent magnet is required as a part to provide a force against gravity, the current of the electromagnet coil It is also not necessary to increase the current because the lens is away from the image sensor, thereby reducing the power consumption and improving the imaging effect due to the excessive temperature in the camera module.
  • the ratio of the density of the liquid to the density of the structure of the lens and the permanent magnet is within a set first threshold. Ensure that the liquid provides sufficient buoyancy to reduce the energy consumption of the electromagnet coil when driving the lens.
  • the first set threshold is between 95% and 105%. That is, the set threshold may be a threshold of a different size.
  • the housing and the support plate are respectively provided with a sealing lens that cooperates with the lens, the sealing lens is a flat lens, and the sealing plate is sealed between the supporting plate and the substrate.
  • the substrate and the support plate enclose a space for accommodating the image sensor.
  • the flat lens does not converge or diffuse light. Effectively guarantee the quality of the camera.
  • a sealing space is formed between the support plate and the substrate, which can prevent liquid leakage and prevent dust from entering the image sensor, thereby affecting the photographing function.
  • the liquid has a density of between 0.2 and 2 g/cm 3 .
  • the liquid may have different choices, either as a single substance, such as distilled water, or as a solution, which is a solution known in the art and can be dissolved according to actual needs. Configuration.
  • the liquid may also be a colorless or colored solution.
  • the liquid is a colorless, transparent solution, and the sealing lens between the lens and the image sensor is a filter. In this solution, since the liquid uses a colorless transparent solution, it is necessary to provide a filter for filtering before the lens and the image sensor.
  • the liquid is a colored transparent liquid that acts as a filter when light is applied to the colored transparent liquid.
  • the number of the electromagnet coils is plural, and the plurality of electromagnet coils are evenly disposed around the permanent magnet. It is convenient to perform attitude control on the lens. In a more specific embodiment, the number of the electromagnet coils is three or four. Or you can use five or six different numbers. And in the specific setting, the spacing between any adjacent electromagnet coils is the same to enclose a cylindrical space. And one side of each electromagnet coil facing the permanent magnet is a concave curved surface.
  • the permanent magnet is elliptical, and the permanent magnet is provided with a through hole for being fitted over the lens.
  • two or more permanent magnets may be mounted on the periphery of the lens to form an ellipsoid.
  • the ellipsoid is based on the principle of imitating the eyeball of a human or an animal. When moving in a liquid environment, the resistance is small, and it is advantageous to make a slight translation or rotation in all directions, which is convenient for posture adjustment.
  • a plurality of support columns disposed at the edge of the support plate and located within the housing are also included, and each support post is used to secure an electromagnet coil.
  • the electromagnet coil is supported by a support column. Further, the electromagnet coil may be fixed by bonding the electromagnet coil to the support plate.
  • a plurality of Hall devices disposed on the support plate and for detecting the attitude of the permanent magnet are further included. Through the Hall device, the attitude of the lens can be monitored, and the posture of the lens can be adjusted.
  • the housing is a housing made of a thermally conductive material, and each electromagnet coil is in pressure contact with an inner wall of the housing.
  • the heat generated by the electromagnet coil can be conducted through the housing to facilitate heat dissipation.
  • the housing can be a metal material or a non-metallic material having a good thermal conductivity.
  • the metal shell can be an iron shell, an aluminum shell or a copper shell, which has a certain strength to protect the lens assembly and has good heat conduction effect.
  • a mobile terminal comprising the camera module of any of the above, and a motherboard chip, wherein the motherboard chip controls powering the electromagnet coil to drive the lens motion Or brake the lens.
  • the heat dissipation of the electromagnet coil is facilitated by using an external arrangement of the electromagnet coil, and by using the liquid filled in the casing, the buoyancy of the liquid is used as a force to overcome the gravity of the lens and the permanent magnet. Part or all of the force, and when buoyancy is used, the buoyancy does not change regardless of the position of the lens, therefore, Even if the magnetic force of the electromagnet coil and the permanent magnet is required as a part to provide a force against gravity, the current of the electromagnet coil does not need to increase the current when the lens is away from the image sensor, thereby reducing energy consumption and improving. Due to the high temperature in the camera module, the camera effect is affected.
  • control device when the camera module has the Hall device, the control device is further configured to: when the Hall device detects that the lens moves to a set position, control the given The electromagnet coil supplies power and brakes the lens.
  • the main board image sensor is further configured to control supply of the electromagnet coil to maintain the density when the density of the liquid is not equal to a density of a structure composed of the lens and the permanent magnet The current required for the position of the lens.
  • the lens posture can be ensured by a small current, and the heat generation of the camera module is reduced.
  • FIG. 1 is a schematic structural diagram of a camera module according to an embodiment of the present invention.
  • Figure 2 is a cross-sectional view of the camera module shown in Figure 1;
  • FIG. 3 is an exploded perspective view of the camera module shown in FIG. 1.
  • FIG. 1 shows an external structure of a camera module according to an embodiment of the present application
  • FIG. 2 shows an internal component fitting structure thereof
  • FIG. 3 shows each component. structure.
  • the embodiment of the present application provides a camera module.
  • the camera module includes a substrate 30.
  • the substrate 30 can be a printed circuit board, and the end of the printed circuit board is convenient for connecting the camera module to other components of the mobile terminal.
  • a flexible circuit board 31 is connected to the end, and a connector is provided at one end of the flexible circuit board 31.
  • the camera module further includes a support plate 21 disposed on the substrate 30, and the support plate 21 is sealingly connected with the casing 10 and encloses a sealed space.
  • the camera module further includes a lens.
  • the support plate 21 is sealingly connected to the housing 10 and encloses a closed space for accommodating the lens 60 and the voice coil driving device in the lens assembly, and the space is filled with the lens 60 and
  • the electromagnet coil 60 (part of the voice coil driving device) supplies a buoyant liquid.
  • the lens 60 and the voice coil driving device in the lens assembly are respectively disposed in the housing 10, and the housing 10 and the support plate 21 are disposed.
  • a sealing lens 40 is provided for mating with the lens 60, and the two sealing lenses 40 are flat lenses. The flat lens does not converge or diffuse light. Avoid affecting imaging.
  • the voice coil driving device includes: a permanent magnet 50 fixedly coupled to the lens 60, and an electromagnet coil 80 surrounding the permanent magnet 50 and fixedly coupled to the support plate 21, wherein when the electromagnet coil 80 is powered, the electromagnet coil 80 is passed through The magnetic field formed between the permanent magnets 50 provides a driving force or a braking force to the lens 60.
  • the lens assembly includes, in addition to a lens 60, an image sensor 70 for transmitting the ingested light to the image sensor 70.
  • the light passes through the sealing lens 40 on the housing 10. After being irradiated into the lens 60 and passing through the sealing lens 40 provided on the support plate 21, it enters the image sensor 70.
  • the image sensor 70 is disposed between the substrate 30 and the support plate 21 and connected to the substrate 30 to convert the optical signal transmitted from the lens 60 into an electrical signal and transmit it to the substrate 30, in a specific embodiment.
  • support plate 21 is sealedly connected to the substrate 30, and the space between the substrate 30 and the support plate 21 is enclosed to accommodate the image sensor 70, that is, the image sensor 70 is sealed, which can effectively prevent dust from entering the image sensor 70, thereby preventing dust from affecting the photograph.
  • the voice coil driving device is a device for providing a driving force by a magnetic force, and includes a permanent magnet 50 fixedly connected to the lens 60 and a plurality of electromagnet coils 80 disposed around the permanent magnet 50 and fixedly connected to the supporting plate 21, as shown in FIG.
  • the number of the electromagnet coils 80 is four, and the substrate 30 and the housing 10 are rectangular, and the four electromagnet coils 80 are located at the four corners of the support plate 21.
  • the electromagnet coil 80 is powered, a force is applied to the lens 60 by a magnetic field formed between the electromagnet coil 80 and the permanent magnet 50.
  • the electromagnet coil 80 forms an electromagnet after energization and generates a magnetic field, and the permanent magnet 50 located in the magnetic field is forced to move under the action of the magnetic force.
  • the permanent magnet 50 may be adsorbed by the electromagnet or repelled by the electromagnet, and therefore, the change may be made by changing the direction of the current in the electromagnet coil 80.
  • the direction of the magnetic field of the electromagnet further increases the adsorption or repulsion between the electromagnet coil 80 and the permanent magnet 50.
  • the movement of the lens 60 can be controlled by controlling the direction and magnitude of the current of the electromagnet coil 80.
  • each of the electromagnet coils 80 can be arbitrarily set with different current magnitudes and directions to achieve translation of the lens 60 in any direction and rotation at any angle.
  • the housing 10 is a housing made of a heat conductive material, and each of the electromagnet coils 80 is in pressure contact with the inner wall of the housing 10.
  • the heat generated by the electromagnet coil 80 can be conducted through the housing 10 to facilitate heat dissipation.
  • the housing 10 can be a metal material or a non-metallic material having a good thermal conductivity.
  • the metal shell can be an iron shell, an aluminum shell or a copper shell, which has a certain strength to protect the lens assembly and has good heat conduction effect.
  • the lens 60 and the permanent magnet 50 fixedly connected thereto are suspended in the liquid, and the suspension can be realized by the buoyancy of the liquid or by the buoyancy + magnetic force.
  • the different implementations described above are based on the buoyancy of the liquid.
  • the volume of water discharged from the structure composed of the lens 60 and the permanent magnet 50 is the same as the volume of the body itself. Therefore, the relationship between the density of the liquid and the density of the structure composed of the lens 60 and the permanent magnet 50 is determined without requiring a magnetic force. It is.
  • the electromagnet coil 80 is not required to provide a force, and the lens 60 and the permanent magnet 50 can be suspended in the liquid by the buoyancy of the liquid, but In this method, the accuracy is required to be high, and it is necessary to ensure that the density of the liquid and the structure composed of the lens 60 and the permanent magnet 50 are exactly the same. However, in this manner, there is an advantage that no additional magnetic force is required, and the lens 60 can be held in this position when it is moved to the desired position.
  • the electromagnet coil 80 is not required to supply power to stabilize the lens 60, thereby reducing the energy consumption of the electromagnet coil 80 and, at the same time, reducing the amount of heat generated.
  • the main board chip of the mobile terminal supplies power to the electromagnet coil 80, and the magnetic force between the electromagnet coil 80 and the permanent magnet 50 provides a driving force to the lens 60 and moves to the lens 60 to
  • the main board chip supplies a reverse current to the electromagnet coil 80, so that the electromagnet coil 80 provides a reverse braking force, that is, when the control lens 60 is moved, only the electromagnet coil 80 is required to provide a driving force.
  • the above-mentioned driving scheme needs to always mention the electromagnet in the prior art.
  • the force is applied to overcome the spring force of the spring, and as the position of the lens 60 changes, the spring force of the spring changes, and the current supplied by the electromagnet needs to be changed at any time. Therefore, the power consumption of the electromagnet coil 80 can be greatly reduced by the solution of the present application.
  • the density of the structure composed of the lens 60 and the permanent magnet 50 and the density of the liquid are there is a certain difference between the two.
  • the electromagnet coil 80 is required to provide a certain magnetic force to overcome the gravity (the density of the liquid is smaller than the density of the structure composed of the lens 60 and the permanent magnet 50) or the buoyancy (the density of the liquid). It is larger than the density of the structure composed of the lens 60 and the permanent magnet 50).
  • the force required by the voice coil driving device is obtained, and the main board chip control input of the mobile terminal can be supplied to the electromagnet coil 80.
  • the current required for force is similar to the above principle, and it is only necessary to supply power to the electromagnet coil 80 in the above principle to additionally provide a force for maintaining the suspension of the lens 60 and the permanent magnet 50.
  • the electromagnet coil 80 is required to be additionally powered, when the scheme is adopted, since the density of the liquid may have a certain difference from the density of the structure composed of the lens 60 and the permanent magnet 50, the device is The processing accuracy is lower.
  • the method of the present embodiment can be adopted by the electromagnet coil.
  • the 80 provides a force to make an adjustment to ensure that the lens 60 and the permanent magnet 50 are suspended in the liquid.
  • the density of the liquid may be the same as the density of the structure composed of the lens 60 and the permanent magnet 50, and there may be some difference, in order to reduce the present application.
  • the energy consumption of the camera module, that is, the heat generation, the density of the body can be set to a first threshold value by using a ratio of the density of the structure composed of the lens 60 and the permanent magnet 50.
  • the first threshold value A set threshold is 95% to 105%. If the ratio of the two is 95%, 98%, 100%, 102%, 105%, etc., any value between 95% and 105%.
  • the liquid in the present application there may be many different options, either as a single substance, such as distilled water, or as a solution, which is a solution known in the prior art, and can be dissolved according to actual needs. Configuration. Further, the liquid may also be a colorless or colored solution. As shown in FIG. 2 and FIG. 3, in a specific embodiment, the liquid is a colorless transparent solution (not shown), and is located between the lens 60 and the image sensor 70 and disposed on the support plate 21.
  • the sealing lens 40 is a filter. In this scheme, since the liquid uses a colorless transparent solution, it is necessary to provide a filter between the lens 60 and the image sensor 70 for filtering.
  • the liquid is a colored transparent liquid that filters the passing light when the light illuminates the colored transparent liquid. That is, the colored transparent liquid is used as a filter, so that the sealing lens 40 between the lens 60 and the image sensor 70 can adopt a transparent lens.
  • the density of the liquid is between 0.2 and 2 g/cm 3 , such as 0.2 g/cm 3 , 0.5 g/cm 3 , 1 g. / cm 3, 1.5g / cm 3 , 2g / cm 3 is between 0.2 ⁇ 2g like any density between 3 / cm.
  • the camera module in the present application is further provided with a plurality of support columns 22, and the support post 22 and the support plate 21 constitute a bracket 20, in specific setting
  • the support column and the support plate in the bracket 20 are directly formed into the bracket 20 by integral molding.
  • a plurality of support columns 22 are disposed at the edge of the support plate 21 and located in the casing 10, and each support The post 22 is used to secure an electromagnet coil 80. That is, the number of the support columns 22 is limited to the electromagnet coil 80 used.
  • the set position is also dependent on the desired position of the electromagnet coil 80.
  • a plurality of electromagnet coils 80 are evenly disposed around the permanent magnets 50. It is convenient to perform attitude adjustment on the lens 60.
  • the number of electromagnet coils 80 is three or four, as shown in FIG. 3, and FIG. 3 shows the use of four electromagnet coils 80. structure.
  • any adjacent electromagnet coils 80 are equally spaced to define a cylindrical space.
  • the cylindrical space is a space defining the lens 60.
  • the lens 60 is located in the cylindrical space so that the electromagnet coil 80 can have a good force with the permanent magnet 50 when it is energized.
  • each of the electromagnet coils 80 faces a side of the permanent magnet 50 as a concave curved surface.
  • one side of the support column 22 facing the permanent magnet 50 is also a circular arc surface, and the plurality of circular arc surfaces are arcuate surfaces at different positions of one cylindrical surface.
  • the concave curved surface formed by the above description is only a specific embodiment, and may be used as a non-arc surface when specifically disposed.
  • the support plate 21 is a rectangular support plate 21, and the number of support columns 22 is four, and the four support columns 22 are respectively supported. Four corners of the board 21.
  • the electromagnet coil 80 can be directly bonded and fixed on the support plate 21, and specifically, the adhesive is directly used.
  • the electromagnet coil 80 is bonded to the corners of the support plate 21 to form a space for accommodating the permanent magnets 50.
  • one permanent magnet 50 may be used as described above, or two or more permanent magnets may be mounted on the periphery of the lens 60 to form an ellipsoid.
  • the ellipsoid is based on the principle of imitating the eyeball of a human or an animal. When moving in a liquid environment, the resistance is small, and it is advantageous to make a slight translation or rotation in all directions, which is convenient for posture adjustment.
  • the driving lens 60 is moved in the axial direction by synchronously supplying power to the plurality of electromagnet coils 80, and when the lateral movement is required, the electromagnetic part of the portion can be passed.
  • the iron coil 80 is powered to drive the drive lens 60 to rotate.
  • the permanent magnet 50 is elliptical, and the permanent magnet 50 is provided with a through hole for fitting on the lens 60.
  • a plurality of Hall devices 90 for detecting the posture of the permanent magnet 50 are provided on the support plate 21 in the present application.
  • the Hall device 90 is coupled to the substrate 30 and detects the position of the lens 60 based on the principle of the magnitude of the magnetic field force sensed by the Hall device 90.
  • the Hall device 90 of the present application is shown.
  • Four, and four Hall devices 90 are disposed around the permanent magnet 50, the position of the lens 60 is determined by the magnetic field force sensed by the Hall device 90 at different positions, and the Hall device 90 transmits the detected signal to the substrate 30.
  • the substrate 30 is further transmitted to the motherboard chip of the mobile terminal, and the posture of the lens 60 is currently known.
  • the present application suspends the camera module lens 60 in the sealed space (enclosed by the substrate 30 and the housing 10), and the position and posture are maintained without the coil being continuously energized or requiring a lower amount of power to be maintained.
  • the power consumption of the voice coil driving device during operation of the camera module is greatly reduced; in addition, the heating of the voice coil driving device is mainly the Joule heat generated after the coil is energized, and the present application reverses the position of the coil of the conventional voice coil driving device and the permanent magnet 50.
  • the use of the electromagnet coil 80 and the metal casing assembly is more advantageous for heat dissipation; in addition, the lubricating fluid inside the sealed cavity of the voice coil driving device is lower than the thermal resistance of the air, which is more favorable between the lens 60 and the voice coil driving device and the housing 10.
  • the thermal diffusion prevents the local heat accumulation and causes the high temperature distortion of the lens to affect the imaging quality of the camera module.
  • the present application further provides a mobile terminal, comprising the camera module of any of the above, and a motherboard chip, wherein the motherboard chip controls power supply to the electromagnet coil to drive the lens 60 to move or brake the lens 60.
  • control device is further configured to control the power supply to the electromagnet coil and brake the lens 60 or brake when the Hall device 90 detects that the lens 60 is moved to the set position. Lens 60.
  • the mobile terminal in the present application may be a common mobile terminal device such as a mobile phone, a tablet computer or a VR device.
  • the external arrangement of the electromagnet coil 80 by using the external arrangement of the electromagnet coil 80, the heat dissipation of the electromagnet coil 80 is facilitated, and by using the liquid filled in the casing 10, the buoyancy of the liquid is used as the overcoming lens 60 and When part or all of the force of the gravity of the permanent magnet 50, and buoyancy is used, the buoyancy does not change regardless of the position of the lens 60.
  • the motherboard chip is also used to control the supply of current to the electromagnet coil 80 to maintain the position of the lens 60 when the density of the liquid is not equal to the density of the structure comprised by the lens 60 and the permanent magnet 50.
  • the attitude of the lens 60 can be ensured by a small current, and the heat generation of the camera module is reduced.

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Abstract

一种摄像模组及移动终端，该模组包括：支撑板设置在基板上；壳体与支撑板密封连接；镜头组件包括：图像传感器以及镜头；音圈驱动装置包括：与镜头固定连接的永磁铁，以及环绕永磁铁并与支撑板固定连接的电磁铁线圈；图像传感器设置在基板与支撑板之间；镜头位于在壳体与密封板形成的空间内，且壳体内填充有给镜头及永磁铁提供浮力的液体。在上述技术方案中，电磁铁线圈外置以便于散热，并且通过液体的浮力作为克服镜头及永磁铁的重力的部分或全部的力，无论镜头处于哪个位置，在需要电磁铁线圈与永磁铁的磁力作为提供一部分克服重力的力时，从而降低了能耗，改善了摄像效果的情况。

Description

一种摄像模组及移动终端
本申请要求在2017年2月4日提交中国专利局、申请号为201710064653.X、发明名称为“一种摄像模组”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及摄像技术领域，尤其涉及一种摄像模组及移动终端。
背景技术
拍照是手机仅次于通话的重要功能之一，拍照场景也是手机发热问题最严重的场景。手机在拍照过程中摄像模组的平均功耗占整机功耗30％左右(约1W)，由于模组体积小功耗高，非常容易在外壳形成局部发热点。摄像模组对应外壳位置局部温度非常高，超过了人体耐受极限。
摄像模组一般由镜头、音圈驱动装置、图像传感器、印刷电路板等主要部件组成。其中音圈驱动装置和图像传感器是主要发热器件，二者大约各占模组一半的功耗，当摄像模组温度升高时许多拍照性能会受到显著影响，如对焦速度、图像清晰度等。
发明内容
本申请实施例提供一种摄像模组及移动终端，用以提高摄像模组的散热效果，提高摄像模组的成像质量。
第一方面，提供了一种摄像模组，该摄像模组包括：基板、支撑板、镜头组件、音圈驱动装置及壳体；其中，
所述支撑板设置在所述基板上；
所述壳体与所述支撑板密封连接；
所述镜头组件包括：图像传感器以及用于将光线传递到所述图像传感器上的镜头；
所述音圈驱动装置包括：与所述镜头固定连接的永磁铁，以及环绕所述永磁铁并与所述支撑板固定连接的电磁铁线圈，在所述电磁铁线圈供电时，通过电磁铁线圈与所述永磁铁之间形成的磁场给所述镜头提供驱动力或制动力；
所述图像传感器设置在所述基板与所述支撑板之间；所述镜头位于在所述壳体与所述密封板形成的空间内，且所述壳体内填充有给所述镜头及所述永磁铁提供浮力的液体。
在上述技术方案中，通过采用电磁铁线圈外置的设置方式，方便了电磁铁线圈的散热，并且，通过采用在壳体内填充满液体，通过该液体的浮力作为克服镜头及永磁铁的重力的部分或全部的力，并且采用浮力时，无论镜头处于哪个位置，浮力大小都不会改变，因此，即使需要电磁铁线圈与永磁铁的磁力作为提供一部分克服重力的力时，电磁铁线圈的电流也不会因为镜头在远离图像传感器的位置时，而需要增大电流，进而降低能耗，改善了由于摄像模组内温度过高而影响摄像效果的情况。
在一个具体的实施方案中，所述液体的密度与所述镜头及所述永磁铁组成的结构的密度的比值介于设定第一阈值内。保证液体能够提供足够的浮力，减少电磁铁线圈在驱动镜头时的能耗。
在一个具体的实施方案中，所述第一设定阈值为95％～105％。即该设定阈值可以为不同大小的阈值。
在一个具体的实施方案中，所述壳体及所述支撑板上分别设置有与所述镜头配合的密封镜片，所述密封镜片为平光镜片，且所述支撑板与所述基板之间密封连接，所述基板与所述支撑板之间围成容纳所述图像传感器的空间。采用平光镜片对光线没有汇聚或扩散作用。有效地保证摄像的质量。同时，通过支撑板与基板之间形成密封空间，既能防止液体泄漏，也能防止灰尘进入图像传感器，影响拍照功能。
在一个具体的实施方案中，所述液体的密度介于0.2～2g/cm3。在该液体中，可以选择任意的密度，只需满足上述范围要求即可。在一个具体的实施方案中，该液体可以具有不同的选择，既可以为单一的物质，如蒸馏水，也可以为溶液，该溶液为现有材质已知的溶液，可以根据实际的需要进行溶度的配置。此外，该液体还可以为无色或有色的溶液。在一个具体的实施方案中，所述液体为无色透明溶液，且所述镜头与所述图像传感器之间的密封镜片为滤光片。在该方案中，由于液体采用无色透明溶液，因此，需要在镜头与图像传感器之前设置一个滤光片进行滤光。在另一个具体的实施方案中，所述液体为有色透明液体，在光线照射到所述有色透明液体时，所述有色透明液体可作为滤光片。
在一个具体的实施方案中，所述电磁铁线圈的个数为多个，多个所述电磁铁线圈环绕所述永磁铁均匀设置。方便对镜头进行姿态调控，在一个更具体的实施方案中，所述电磁铁线圈的个数为三个或四个。或者还可以采用五个、六个等不同个数。并且在具体设置时，任意相邻的电磁铁线圈之间间隔相同，以围成一个圆柱体空间。且每个电磁铁线圈朝向永磁铁的一面为内凹的弧形面。
在一个具体的实施方案中，所述永磁铁为椭圆形，且所述永磁铁上设置有用于套装在所述镜头上的通孔。此外，还可以采用两个或两个以上的永磁体镶嵌在镜头外围，拼凑成一个椭球体。椭球体是采用模仿人或动物的眼球的原理，在液体环境中运动时阻力小，且有利于朝向各个方向做微小的平动或转动，便于姿态调整。
在一个具体的实施方案中，还包括设置在所述支撑板边缘且位于所述壳体内的多个支撑柱，且每个支撑柱用于固定一个电磁铁线圈。通过支撑柱来支撑电磁铁线圈。此外，还可以采用将电磁铁线圈粘接在支撑板上的方式来固定电磁铁线圈。
在一个具体的实施方案中，还包括设置在所述支撑板上并用于检测所述永磁铁姿态的多个霍尔器件。通过霍尔器件可以实现对镜头姿态的监控，便于调整镜头的姿态。
在一个具体的实施方案中，所述壳体为导热材料制作的壳体，且每个电磁铁线圈与所述壳体的内壁抵压接触。电磁铁线圈产生的热量可以通过壳体传导出去，便于散热，较佳的，该壳体可以为金属材料或或导热性较好的非金属材料制作的壳体，在采用金属壳体时，该金属壳可以为铁壳、铝壳或铜壳，既有一定的强度保护镜头组件，也具有良好的热传导效果。
第二方面，提供了一种移动终端，该移动终端包括上述任一项所述的摄像模组，以及主板芯片，其中，所述主板芯片控制给所述电磁铁线圈供电以驱动所述镜头运动或制动所述镜头。
在上述技术方案中，通过采用电磁铁线圈外置的设置方式，方便了电磁铁线圈的散热，并且，通过采用在壳体内填充满液体，通过该液体的浮力作为克服镜头及永磁铁的重力的部分或全部的力，并且采用浮力时，无论镜头处于哪个位置，浮力大小都不会改变，因此， 即使需要电磁铁线圈与永磁铁的磁力作为提供一部分克服重力的力时，电磁铁线圈的电流也不会因为镜头在远离图像传感器的位置时，而需要增大电流，进而降低能耗，改善了由于摄像模组内温度过高而影响摄像效果的情况。
在一个具体的实施方案中，在所述摄像模组具有所述霍尔器件时，所述控制装置还用于在所述霍尔器件检测到所述镜头移动到设定位置时，控制给所述电磁铁线圈供电并制动所述镜头。
在一个具体的实施方案中，所述主板图像传感器还用于在所述液体的密度不等于所述镜头及所述永磁铁组成的结构的密度时，控制给所述电磁铁线圈供给保持所述镜头所在位置所需的电流。通过一个较小的电流即可保证镜头的姿态，降低了摄像模组的产热量。
附图说明
图1为本发明实施例提供的摄像模组的结构示意图；
图2为图1所示的摄像模组的剖视图；
图3为图1所示的摄像模组的分解示意图。
具体实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述。
如图1、图2及图3所示，其中，图1示出了本申请实施例的摄像模组的外观结构，图2示出了其内部部件配合结构，图3示出了各个部件的结构。
本申请实施例提供了一种摄像模组，该摄像模组包括一个基板30，该基板30可以为印刷电路基板，并且为了方便摄像模组与移动终端其他部件的连接，该印刷电路基板的端部连接了柔性电路板31，该柔性电路板31的一端设置了连接器。此外，该摄像模组还包括一个支撑板21，该支撑板21设置在基板30上，并且支撑板21与壳体10密封连接并围成一个密闭空间，此外，该摄像模组还包括一个镜头组件及一个音圈驱动装置，支撑板21与壳体10密封连接并围成的密闭空间用于容纳镜头组件中的镜头60及音圈驱动装置，并且该空间内充满了用于给镜头60以及电磁铁线圈60(音圈驱动装置的一部分)提供浮力的液体，在具体设置时，镜头组件中的镜头60及音圈驱动装置分别设置在壳体10内，并且壳体10及支撑板21上分别设置了一个与镜头60配合的密封镜片40，两个密封镜片40均为平光镜片。采用平光镜片对光线没有汇聚或扩散作用。避免对成像造成影响。音圈驱动装置包括：与镜头60固定连接的永磁铁50，以及环绕永磁铁50并与支撑板21固定连接的电磁铁线圈80，其中，在电磁铁线圈80供电时，通过电磁铁线圈80与永磁铁50之间形成的磁场给镜头60提供驱动力或制动力。
其中的镜头组件除了包括一个镜头60外，还包括一个图像传感器70，该镜头60用于将摄入的光线传递到图像传感器70上，在使用时，光线穿过壳体10上的密封镜片40后照射入镜头60中，并穿过设置在支撑板21上的密封镜片40后进入到图像传感器70。在具体设置时，图像传感器70设置在基板30与支撑板21之间，并与基板30连接，以将镜头60传输过来的光信号转换成电信号并传递给基板30，在一个具体的实施例中，支撑板 21与基板30之间密封连接，基板30与支撑板21之间围成容纳所述图像传感器70的空间，即图像传感器70被密封起来，能有效防止灰尘进入图像传感器70，从而避免灰尘影响拍照功能。
在安装时，镜头60悬浮在液体中。其中的音圈驱动装置为依靠磁力提供驱动力的装置，其包括与镜头60固定连接的永磁铁50以及多个环绕永磁铁50设置并与支撑板21固定连接的电磁铁线圈80，如图2及图3所示，在一个具体的实施例中，电磁铁线圈80的个数为四个，且基板30及壳体10采用矩形，四个电磁铁线圈80位于支撑板21的四个边角处。在电磁铁线圈80供电时，通过电磁铁线圈80与永磁铁50之间形成的磁场给镜头60提供力。具体的，电磁铁线圈80在通电后形成电磁铁并产生磁场，位于磁场内的永磁铁50在磁力的作用下受力而开始运动。在具体控制时，当电磁铁产生的磁场的方向改变时，永磁铁50会出现被电磁铁吸附，或被电磁铁排斥的情况，因此，可以通过改变电磁铁线圈80内的电流方向从而实现改变电磁铁的磁场方向，进而实现电磁铁线圈80与永磁铁50之间的吸附或排斥。由于永磁铁50固定在镜头60上，电磁铁线圈80与支撑板21固定连接，因此，可以通过控制电磁铁线圈80的电流方向以及大小可以控制镜头60的移动。此外，每一个电磁铁线圈80均可任意设置不同电流大小和方向，实现镜头60在任意方向的平动和任意角度的转动。在采用该方式设置时，由于电磁铁线圈80处于外围，因此，产生的热量更容易散发出去。此外，在具体设置时，为了进一步的便于散热，该壳体10为导热材料制作的壳体，且每个电磁铁线圈80与壳体10内壁抵压接触。电磁铁线圈80产生的热量可以通过壳体10传导出去，便于散热，其中，该壳体10可以为金属材料或导热性较好的非金属材料制作的壳体，在采用金属壳体时，该金属壳可以为铁壳、铝壳或铜壳，既有一定的强度保护镜头组件，也具有良好的热传导效果。
在上述结构中，镜头60以及与其固定连接的永磁铁50悬浮在液体中，既可以完全依靠液体的浮力实现悬浮，也可以通过浮力+磁力共同作用来实现悬浮。上述不同的实现方式是基于液体的浮力而定的，由浮力的原理可知浮力F＝密度*排出水的体积，而在本申请中，由于液体充满整个壳体10与基板30围成的空间，因此，镜头60以及永磁铁50组成的结构排出的水的体积与自身的体积相同，因此，需不需要磁力就决定于液体的密度与镜头60及永磁铁50组成的结构的密度之间的关系了。在液体的密度等于镜头60及永磁铁50组成的结构的密度时，此时，无需电磁铁线圈80提供力，靠液体的浮力即可实现将镜头60及永磁铁50悬浮在液体中，但是在该方式中，对精度要求较高，需要保证液体与镜头60及永磁铁50组成的结构的密度完全相同。但是采用该方式时，具有无需额外的磁力的优点，在镜头60移动到所需的位置时，即可实现保持在该位置。因此，在稳定镜头60时无需电磁铁线圈80供电以提供力，从而降低了电磁铁线圈80的能耗，同时，也降低了产生的热量。在该方式中，当需要控制镜头移动时，移动终端的主板芯片给电磁铁线圈80供电，电磁铁线圈80与永磁体50之间的磁力给镜头60提供一个驱动力，并在镜头60移动到设定位置时，主板芯片给电磁铁线圈80供给一个反向电流，使得电磁铁线圈80提供一个反向的制动力，即在控制镜头60运动时，只需要电磁铁线圈80提供一个驱动力，以及一个反向的制动力，并且在提供驱动力时，由于镜头60及永磁铁50线圈在处于液体中的任何位置时，受到的浮力相同，且等于镜头60及永磁铁50的重力，因此，只需要给电磁铁线圈80供给很短时间的电流即可实现驱动镜头60运动起来，并且，镜头60在运动起来后，无需再提供力。上述驱动方案与现有技术相比，现有技术中的电磁铁需要一直提 供力来克服弹簧的弹力，以及在随着镜头60位置的变化，弹簧的弹力改变，电磁铁供给的电流需要随时更改。因此，采用本申请的方案可以很大程度的减少了电磁铁线圈80的耗电量。
在采用另外的一种方式时，即通过浮力+磁力共同作用来实现镜头60及电磁铁线圈80组成的结构悬浮时，此时，镜头60及永磁铁50组成的结构的密度与液体的密度之间存在一定的差值，在需要镜头60保持位置时，需要电磁铁线圈80提供一定的磁力来克服重力(液体的密度小于镜头60及永磁铁50组成的结构的密度)或浮力(液体的密度大于镜头60及永磁铁50组成的结构的密度)。具体的，根据在设计时镜头60和永磁铁50的重力与浮力之间的差值，得到音圈驱动装置所需提供的力，移动终端的主板芯片控制输入到电磁铁线圈80中能够供该力时所需的电流。本方案中的原理与上述原理相近似，只需在上述原理中给电磁铁线圈80供电以额外提供一个用于维持镜头60及永磁铁50悬浮的力。在本方案中，虽然需要电磁铁线圈80额外供电，但是在采用该方案时，由于液体的密度可以与镜头60及永磁铁50组成的结构的密度之间存在一定的差值，因此，对器件加工精度的要求较低。在大规模生产时，由于镜头60及永磁铁50在加工时，不可避免的存在加工误差以及装配误差，并且液体的密度也无法保证完全一致，因此，采用本方案的方式，可以通过电磁铁线圈80提供力来进行一个调整，保证镜头60及永磁铁50悬浮在液体中，在出现误差时，只需调整供给电磁铁线圈80的电流即可，便于大规模的生产。此外，针对上述的方案，与现有技术相比，只需要将液体的密度与镜头60及永磁铁50组成的结构的密度之间的差值处于一定的范围内，其同样具有降低产热的效果。
通过上述两种不同实现镜头60悬浮的描述可以看出，在本申请中，液体的密度可以与镜头60及永磁铁50组成的结构的密度相同，也可以存在一定的差异，为了降低本申请提供的摄像模组的能耗，即降低产热量，该体的密度可以采用与镜头60及永磁铁50组成的结构的密度的比值介于设定第一阈值内，具体的，该第一阈值第一设定阈值为95％～105％。如两者的比值为95％、98％、100％、102％、105％等任意介于95％～105％的数值。
对于本申请中的液体，可以有多种不同的选择，既可以为单一的物质，如蒸馏水，也可以为溶液，该溶液为现有材质已知的溶液，可以根据实际的需要进行溶度的配置。此外，该液体还可以为无色或有色的溶液。如图2及图3所示，在一个具体的实施方案中，液体为无色透明溶液(图中未示出)，此时，位于镜头60与图像传感器70之间且设置在支撑板21上的密封镜片40为滤光片。在该方案中，由于液体采用无色透明溶液，因此，需要在镜头60与图像传感器70之间设置一个滤光片进行滤光。在另一个具体的实施方案中，液体为有色透明液体，在光线照射到有色透明液体时，有色透明液体可可对穿过的光线进行滤光。即通过有色透明液体作为滤光片，从而使得镜头60与图像传感器70之间的密封镜片40可以采用透明的镜片。
此外，对于上述液体来说，可以选定一定范围密度的液体，在一个具体的方案中，液体的密度介于0.2～2g/cm3，如0.2g/cm3、0.5g/cm3、1g/cm3、1.5g/cm3、2g/cm3等任意介于0.2～2g/cm3之间的密度。
作为一个更具体的方案，为了方便电磁铁线圈80的设置，在本申请中的摄像模组还设置了多个支撑柱22，该支撑柱22及支撑板21组成一个支架20，在具体设置时，该支架20中的支撑柱及支撑板采用一体成型的方式直接制作成支架20，
在具体设置时，多个支撑柱22设置在支撑板21边缘且位于壳体10内，且每个支撑 柱22用于固定一个电磁铁线圈80。即该支撑柱22的设置个数与采用的电磁铁线圈80限定。且设置位置也依照电磁铁线圈80所需的位置而定。在一个具体的实施方案中，多个电磁铁线圈80环绕永磁铁50均匀设置。方便对镜头60进行姿态调控，在一个更具体的实施方案中，电磁铁线圈80的个数为三个或四个，如图3所示，图3示出了采用四个电磁铁线圈80的结构。当然应当理解的是，还可以采用五个、六个等不同个数。并且在具体设置时，任意相邻的电磁铁线圈80之间间隔相同，以围成一个圆柱体空间。该圆柱体空间为限定镜头60的空间，在镜头60悬浮于液体内时，镜头60位于该圆柱体空间内，以便于电磁铁线圈80通电时能够与永磁铁50之间有良好的作用力。在具体设置时，每个电磁铁线圈80朝向永磁铁50的一面为内凹的弧形面。对应的，该支撑柱22上朝向永磁铁50的一面也为圆弧面，且多个圆弧面为一个圆柱面不同位置的弧形面。应当理解的是上述描述形成的内凹的弧形面仅为一个具体的实施方式，在具体设置时，也可以作为成非弧形的面。继续参考图3，由图3中可以看出，在一个具体的实施方案中，该支撑板21为矩形支撑板21，且支撑柱22的个数为四个，四个支撑柱22分别位于支撑板21的四个边角处。
此外，对于电磁铁线圈80的固定，除了上述中采用支撑架22的方式外，还可以采用将电磁铁线圈80直接粘接固定在支撑板21上的方式实现，具体的，采用通过粘胶直接将电磁铁线圈80粘接在支撑板21的边角处形成容纳永磁铁50的空间。
对于上述中的永磁铁50，既可以采用上述中的采用一个永磁铁50，也可以采用两个或两个以上的永磁体镶嵌在镜头60外围，拼凑成一个椭球体。椭球体是采用模仿人或动物的眼球的原理，在液体环境中运动时阻力小，且有利于朝向各个方向做微小的平动或转动，便于姿态调整。
在具体调整姿态时，在需要调整镜头60的轴向位置时，通过对多个电磁铁线圈80同步供电，驱动镜头60沿其轴向方向移动，当需要横向移动时，可以通过对部分的电磁铁线圈80供电，以实现驱动镜头60转动。为了方便调整镜头60的姿态，在本申请中，永磁铁50为椭圆形，且永磁铁50上设置有用于套装在镜头60上的通孔。
更佳的，为了方便调整镜头60的姿态，在本申请中在支撑板21上设置了多个用于检测永磁铁50姿态的多个霍尔器件90。该霍尔器件90与基板30连接，并根据霍尔器件90感知的磁场力大小的原理检测镜头60的位置，在一个具体的实施方式中，如图3所示，本申请的霍尔器件90为四个，且四个霍尔器件90环绕永磁铁50设置，通过不同位置的霍尔器件90感知的磁场力来判断镜头60的位置，并且霍尔器件90将检测到的信号传递给基板30，基板30再传递给移动终端的主板芯片，进而获知镜头60当前所处的姿态。
通过上述描述可以看出，本申请将摄像模组镜头60悬浮于密封空间(基板30与壳体10围成)内部，位置和姿态的维持无需线圈持续通电或者需要较低的电量即可维持，大大降低摄像模组工作时的音圈驱动装置的功耗；此外，音圈驱动装置发热主要是线圈通电之后产生的焦耳热，本申请将传统音圈驱动装置的线圈与永磁铁50位置对调，并采用电磁铁线圈80与金属壳体组装更有利于散热；此外，音圈驱动装置密封腔体内部的润滑液比空气热阻低，更利于镜头60与音圈驱动装置及壳体10之间的热扩散，防止局部热量累积造成镜片高温畸变影响摄像模组成像质量。
此外，本申请还提供了一种移动终端，该移动终端包括上述任一项的摄像模组，以及主板芯片，其中，主板芯片控制给电磁铁线圈供电以驱动镜头60运动或制动镜头60。
此外，在摄像模组具有霍尔器件90时，控制装置还用于在霍尔器件90检测到镜头60移动到设定位置时，控制给电磁铁线圈供电并制动镜头60或制动所述镜头60。
应当理解的是，在本申请中的移动终端可以为手机、平板电脑或者VR设备等常见的移动终端设备。并且在上述方案中，通过采用电磁铁线圈80外置的设置方式，方便了电磁铁线圈80的散热，并且，通过采用在壳体10内填充满液体，通过该液体的浮力作为克服镜头60及永磁铁50的重力的部分或全部的力，并且采用浮力时，无论镜头60处于哪个位置，浮力大小都不会改变，因此，即使需要电磁铁线圈80与永磁铁50的磁力作为提供一部分克服重力的力时，电磁铁线圈80的电流也不会因为镜头60在远离图像传感器70的位置时，而需要增大电流，进而降低能耗，改善了由于摄像模组内温度过高而影响摄像效果的情况。
在一个具体的实施方案中，主板芯片还用于在液体的密度不等于镜头60及永磁铁50组成的结构的密度时，控制给电磁铁线圈80供给保持镜头60所在位置所需的电流。通过一个较小的电流即可保证镜头60的姿态，降低了摄像模组的产热量。
显然，本领域的技术人员可以对本申请实施例进行各种改动和变型而不脱离本申请的精神和范围。这样，倘若本申请实施例的这些修改和变型属于本申请权利要求及其等同技术的范围之内，则本申请也意图包含这些改动和变型在内。

Claims (16)

  1. 一种摄像模组，其特征在于，包括：基板、支撑板、镜头组件、音圈驱动装置及壳体；其中，
    所述支撑板设置在所述基板上；
    所述壳体与所述支撑板密封连接；
    所述镜头组件包括：图像传感器以及用于将光线传递到所述图像传感器上的镜头；
    所述音圈驱动装置包括：与所述镜头固定连接的永磁铁，以及环绕所述永磁铁并与所述支撑板固定连接的电磁铁线圈，在所述电磁铁线圈供电时，通过所述电磁铁线圈与所述永磁铁之间形成的磁场给所述镜头提供驱动力或制动力；
    所述图像传感器设置在所述基板与所述支撑板之间；所述镜头位于在所述壳体与所述密封板形成的空间内，且所述壳体内填充有给所述镜头及所述永磁铁提供浮力的液体。
  2. 如权利要求1所述的摄像模组，其特征在于，所述液体的密度与所述镜头及所述永磁铁组成的结构的密度的比值介于设定第一阈值内。
  3. 如权利要求2所述的摄像模组，其特征在于，所述第一设定阈值为95％～105％。
  4. 如权利要求1所述的摄像模组，其特征在于，所述壳体及所述支撑板上分别设置有与所述镜头配合的密封镜片，所述密封镜片为平光镜片，且所述支撑板与所述基板之间密封连接，所述基板与所述支撑板之间围成容纳所述图像传感器的空间。
  5. 如权利要求1～3任一项所述的摄像模组，其特征在于，所述液体的密度介于0.2～2g/cm3。
  6. 如权利要求1～5任一项所述的摄像模组，其特征在于，所述液体为无色透明溶液，且所述镜头与所述图像传感器之间的密封镜片为滤光片。
  7. 如权利要求1～5任一项所述的摄像模组，其特征在于，所述液体为有色透明液体，所述有色透明液体可对穿过的光线进行滤光。
  8. 如权利要求1～7任一项所述的摄像模组，其特征在于，所述电磁铁线圈的个数为多个，且多个所述电磁铁线圈环绕所述永磁铁均匀设置。
  9. 如权利要求8所述的摄像模组，其特征在于，所述电磁铁线圈的个数为三个或四个。
  10. 如权利要求1～9任一项所述的摄像模组，其特征在于，所述永磁铁为椭圆形，且所述永磁铁上设置有用于套装在所述镜头上的通孔。
  11. 如权利要求1～10任一项所述的摄像模组，其特征在于，还包括设置在所述支撑板边缘且位于所述壳体内的支撑柱，且每个支撑柱用于固定一个电磁铁线圈。
  12. 如权利要求1～11任一项所述的摄像模组，其特征在于，还包括设置在所述支撑板上并用于检测所述永磁铁姿态的多个霍尔器件。
  13. 如权利要求1～12任一项所述的摄像模组，其特征在于，所述壳体为导热材料制作的壳体，且每个电磁铁线圈与所述壳体的内壁抵压接触。
  14. 一种移动终端，其特征在于，包括如权利要求1～13任一项所述的摄像模组，以及主板芯片，其中，所述主板芯片控制给所述电磁铁线圈供电以驱动所述镜头运动或制动所述镜头。
  15. 如权利要求14所述的移动终端，其特征在于，在所述摄像模组具有所述霍尔器 件时，所述控制装置还用于在所述霍尔器件检测到所述镜头移动到设定位置时，控制给所述电磁铁线圈供电并制动所述镜头。
  16. 如权利要求14所述的移动终端，其特征在于，所述主板芯片还用于在所述液体的密度不等于所述镜头及所述永磁铁组成的结构的密度时，控制给所述电磁铁线圈供给保持所述镜头所在位置所需的电流。
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