阅读说明：本技术 透镜移动单元和包含该透镜移动单元的摄像头模块 (Lens mobile unit and camera module comprising the lens mobile unit ) 是由 朴相沃 孙秉旭 李圣民 李准泽 于 2015-02-25 设计创作，主要内容包括：根据实施例的透镜驱动装置包括：可移动单元,上面安装有至少一个透镜；第一线圈和驱动磁体,彼此相对且相互作用使得可移动单元在透镜的光轴方向上移动；感测可移动单元在光轴方向上的位置的位置传感器或包含位置传感器的驱动器；以及极性磁化磁体,被布置为面对位置传感器或驱动器,其中极性磁化磁体包括：第一侧表面,面对位置传感器并且具有第一极性；以及第二侧表面,面对位置传感器,被布置为在与光轴方向平行的方向上与第一侧表面间隔开或者被布置为紧靠第一侧表面,并且具有与第一侧表面的第一极性相反的第二极性,并且第一侧表面在光轴方向上的长度可以等于或大于第二侧表面在光轴方向上的长度。(Lens driver according to the embodiment includes: movable units, is equipped at least one lens above；First coil and driving magnet, opposite to each other and interaction is so that movable units move on the optical axis direction of lens；Sense the position sensor of the position of movable units in the direction of the optical axis or the driver comprising position sensor；And polarity magnetised magnets, it is arranged in face of position sensor or driver, wherein polarity magnetised magnets include: the first side surface, in face of position sensor and have the first polarity；And second side surface, in face of position sensor, it is arranged on the direction parallel with optical axis direction and is spaced apart or is disposed proximate to the first side surface with the first side surface, and there is the first opposite polarity second polarity with the first side surface, and the length of the first side surface in the direction of the optical axis can be equal to or more than the length of the second side surface in the direction of the optical axis.)

1. a kind of lens mobile unit, the lens mobile unit include:

Base portion；

The lid component, the The lid component are couple to the base portion, and the The lid component includes upper surface and extends from the upper surface Multiple side walls；

Spool, the spool setting on the base portion, and are configured to move in the direction of the optical axis；

A pair of of driving magnet, the pair of driving magnet are arranged in the The lid component；

Coil unit, the coil unit are arranged in the spool, and face the pair of driving magnet；

Sensing magnet, the sensing magnet are arranged in the spool；

Position sensor, the position sensor are configured to detect the sensing magnet, and

Wherein, the multiple side wall of the The lid component includes: the first side wall and second sidewall relative to each other, and setting exists Between the first side wall and the second sidewall and third side wall and the 4th side wall relative to each other,

Wherein, the pair of driving magnet includes: the first magnet being arranged on the first side wall of the The lid component, and is set The second magnet in the second sidewall of the The lid component is set,

Wherein, not set driving magnet on the third side wall and the 4th side wall of the The lid component, and

Wherein, the first surface corresponding with the third side wall of the The lid component of the spool is arranged in the sensing magnet On.

2. lens mobile unit according to claim 1, including circuit board, the circuit board includes multiple terminals,

Wherein, the circuit board is arranged at position corresponding with the third side wall of the The lid component,

Wherein, the position sensor is arranged on the circuit board, and

Wherein, the multiple terminal is arranged on the bottom end of the circuit board.

3. lens mobile unit according to claim 1, wherein the pair of driving magnet is parallel to each other, and

Wherein, the The lid component is formed by metal material or magnetic material.

4. lens mobile unit according to claim 1, wherein the sensing magnet setting is not facing the pair of drive At the position of dynamic magnet, and the sensing magnet is less than the pair of driving magnet.

5. lens mobile unit according to claim 1, wherein in the table in face of the spool with the third side wall On the vertical direction in face, the sensing magnet is not Chong Die with the third side wall of the The lid component.

6. lens mobile unit according to any one of claims 1-5,

Wherein, the The lid component is integrally formed with inner yoke,

Wherein, the inner yoke of the The lid component include four inner yokes, and four inner yokes be separately positioned on At the corresponding position in four turnings of the The lid component, and

Wherein, a side surface of the inner yoke is spaced apart with the coil unit, another side surface of the inner yoke It is spaced apart with the spool.

7. lens mobile unit according to claim 6, wherein the inner yoke includes:

Bending part, the bending part are bent downward from the The lid component；With

Neck part, the neck part are formed at the position adjacent with the bending part, the neck part of the inner yoke It is asymmetrically formed.

8. lens mobile unit according to any one of claims 1-5, wherein make described first by adhesive respectively Magnet is fixed to the first side wall of the The lid component and second magnet is made to be fixed to described the of the The lid component Two side walls.

9. lens mobile unit according to claim 1, further includes:

The elastic component coupled with the spool,

Wherein, the elastic component includes the lower elastic component and upper with the spool with the coupling of the lower surface of the spool The upper elastic component of surface coupling,

Wherein, the lower elastic component includes the first spring being separated from each other and second spring,

Wherein, first spring is electrically connected with one end of the coil unit,

Wherein, the second spring is electrically connected with the other end of the coil unit, and

Wherein, first spring and the second spring are electrically connected to circuit board.

10. lens mobile unit according to claim 9, wherein at least part of the circuit board is arranged described On the side surface of base portion.

11. lens mobile unit according to any one of claims 1-5, wherein the position sensor includes Hall Sensor, and

Wherein, the sensing magnet includes bipolar magnetised magnets.

12. lens mobile unit according to any one of claims 1-5, wherein the spool is included in the spool The side wall towards the third side wall of the The lid component on recess portion, and

Wherein, the sensing magnet is arranged in the recess portion of the spool.

13. lens mobile unit according to any one of claims 1-5,

Wherein, the pair of driving magnet is arranged on shell.

14. lens mobile unit according to any one of claims 1-5, wherein the sensing magnet and correct magnets It is arranged to from the sensing magnet towards not Chong Die with the pair of driving magnet on the direction of the optical axis.

15. lens mobile unit according to any one of claims 1-5, wherein the sensing magnet is in the optical axis Side is upwardly facing the coil unit, or the contact coil unit.

16. lens mobile unit according to claim 2, wherein the circuit board is arranged in described in the The lid component On third side wall.

17. lens mobile unit according to claim 2, wherein the circuit board is arranged in described in the The lid component On the inside of third side wall.

18. lens mobile unit according to claim 1, wherein with the first side wall in face of the spool On the vertical direction in surface, the sensing magnet is Chong Die with the first side wall of the The lid component.

19. a kind of camera module, comprising:

Lens mobile unit described in any one of claim 1-18；

With the lens barrel of spool coupling；

Imaging sensor；And

The printed circuit board of described image sensor, i.e. PCB are installed.

20. camera module according to claim 19, wherein the camera module is configured to by using described Sensing magnet and the position sensor receive the location information of the spool to execute automatic focusing, i.e. AF.

21. a kind of lens mobile unit, the lens mobile unit include:

Base portion；

The lid component, the The lid component are couple to the base portion, and the The lid component includes upper surface and extends from the upper surface Multiple side walls；

Spool, the spool setting on the base portion, and are configured to move in the direction of the optical axis；

A pair of of driving magnet, the pair of driving magnet are arranged in the The lid component；

Coil unit, the coil unit are arranged in the spool, and face the pair of driving magnet；

Sensing magnet, the sensing magnet are arranged in the spool；

Position sensor, the position sensor are configured to detect the sensing magnet, and

Wherein, the multiple side wall of the The lid component includes: the first side wall and second sidewall relative to each other, and setting exists Between the first side wall and the second sidewall and third side wall and the 4th side wall relative to each other,

Wherein, the pair of driving magnet includes: the first magnet being arranged on the first side wall of the The lid component, and is set The second magnet in the second sidewall of the The lid component is set,

Wherein, not set driving magnet on the third side wall and the 4th side wall of the The lid component,

Wherein, the first surface corresponding with the third side wall of the The lid component of the spool is arranged in the sensing magnet On,

Wherein, the coil unit is wrapped in around the outer peripheral surface of the spool, and

Wherein, so that first magnet is fixed to the first side wall of the The lid component by adhesive respectively and make described Second magnet is fixed to the second sidewall of the The lid component.

22. lens mobile unit according to claim 21, wherein with the third side wall in face of the spool On the vertical direction in surface, the sensing magnet is not Chong Die with the third side wall of the The lid component.

23. lens mobile unit according to claim 21, wherein with the first side wall in face of the spool On the vertical direction in surface, the sensing magnet is Chong Die with the first side wall of the The lid component.

Technical field

Background technique

Recently, the product with built-in miniature digital camera of IT field, such as mobile phone, smart phone, plate electricity Brain, laptop etc. are energetically developed.Camera module including digital camera is needed with multiple functions, Such as, automatic to focus, mitigate shutter shake, zoom function etc., and its nearest development trend concentrates on increase pixel number and micro- In type.

Conventional camera module may include the lens driving for being able to carry out automatic focusing function and hand shaking compensation function Device.Lens driver can be constructed in many ways, wherein usually using voice coil unit motor.Voice coil unit motor passes through The magnet being fixed on shell and outer peripheral surface (the outer peripheral wound on the spool coupled with lens barrel Surface the electromagnetic interaction between coil unit on) and work, thereby executing automatic focusing function.With this sound Actuator (actuator) module of circle motor is configured such that vertically removable spool is by lower elastic component and upper elasticity Component can move back and forth while being elastically supported on the direction parallel with optical axis direction.

IT product with conventional built-in miniature digital camera includes for by adjusting imaging sensor and lens The distance between come be arranged lens focal length lens driver.However, as conventional Minitype digital camera presence It is considerably long to execute the automatic focal time that automatic focusing function is spent for problem.Therefore, it is automatic to shorten to have made many effort Focal time, but due to unstable electromagnetic force and the bias of the lens barrel as caused by magnetic force (eccentricity), The performance of lens driver can be deteriorated.

Conventional camera module may include Hall sensor (not shown) and sensing magnet (not shown), be set For the focal position to detect lens opposite to each other on the direction vertical with the optical axis direction of lens.In this case, Hall sensor senses the magnetic field of sensing magnet and exports corresponding voltage.By using what is exported from Hall sensor Voltage can detecte the position of lens in the direction of the optical axis, but Hall sensor cannot accurately sense lens in optical axis direction On movement and therefore there is limitation to the ability of the position of detection lens.

Summary of the invention

Technical problem

Detailed description of the invention

Fig. 1 shows the perspective schematic view of camera module according to first embodiment.

Fig. 2 shows the decomposition perspective views of camera module shown in FIG. 1.

Fig. 3 shows the perspective view of spool shown in Fig. 2.

Fig. 4 shows the front view of camera module shown in FIG. 1.

Fig. 5 shows the plan view of the camera module of the interception of the line I-I' in Fig. 4.

Fig. 6 shows the front view of the lens driver after removing circuit board from camera module shown in FIG. 1.

Fig. 7 shows the perspective schematic view of lens driver according to the second embodiment.

Fig. 8 shows the schematic, exploded perspective view of the embodiment of lens driver according to figure 7.

Fig. 9 shows the signal of the embodiment according to the lens driver eliminated in Fig. 7 of lid shell (cover can) Property perspective view.

Figure 10 is the schematic transparent plan view according to the housing member of another embodiment.

Figure 11 is the schematic bottom perspective view according to the housing member of another embodiment.

Figure 12 is shown according to the driving magnet of another embodiment, housing member, first circuit board and displacement sensing portion Schematic, exploded perspective view.

Figure 13 shows the plane perspective view of the upper elastic component according to one embodiment.

Figure 14 shows the plane perspective view of the lower elastic component according to one embodiment.

Figure 15 shows the plane perspective view of the spool according to another embodiment.

Figure 16 shows the bottom perspective view of the spool according to another embodiment.

Figure 17 shows the decomposition according to the spool of another embodiment, first coil, displacement sensing portion and sensing magnet Perspective view.

Figure 18 is shown according to the spool of another embodiment, first coil, the first and second driving magnets, displacement sensing The schematic bottom perspective view in portion and sensing magnet.

Figure 19 is the perspective schematic view of lens driver according to the third embodiment.

Figure 20 is the schematic, exploded perspective view of lens driver shown in Figure 19.

Figure 21 is the perspective schematic view of the lens driver in the Figure 19 for eliminate The lid component.

Figure 22 is the schematic plan view of Figure 21.

Figure 23 is the schematic perspective according to the driving magnet of still another embodiment, housing member and displacement sensing portion Figure.

Figure 24 is the signal of the driving magnet, housing member and first circuit board when from the angle different from Figure 23 Property perspective view.

Figure 25 is saturating according to the schematic bottom of the driving magnet of still another embodiment, housing member and first circuit board View.

Figure 26 is according to the driving magnet of still another embodiment, housing member, first circuit board and displacement sensing portion Schematic, exploded perspective view.

Figure 27 is the schematic plan view according to the upper elastic component of another embodiment.

Figure 28 is the schematic plan view according to the lower elastic component of another embodiment.

Figure 29 is the perspective schematic view according to the spool of still another embodiment.

Figure 30 is the schematic bottom perspective view of the spool and sensing magnet according to still another embodiment.

Figure 31 is the schematic, exploded perspective view according to the spool of still another embodiment, first coil and sensing magnet.

Figure 32 is the close up perspective view of the state of spool according to the embodiment and sensing magnet coupling.

Figure 33 is the partial enlargement bottom view of the state of spool according to the embodiment and sensing magnet coupling.

Figure 34 is the close up perspective view for explaining the receiving recess portion of spool according to the embodiment.

Figure 35 is the schematic vertical sectional view according to the spool of still another embodiment, first coil and sensing magnet.

Figure 36 shows the schematic cross sectional views of the lens driver according to 4-1 embodiment.

Figure 37 a and 37b respectively illustrate the cross-sectional view of the embodiment of bipolar magnetised magnets shown in Figure 36.

Figure 38 is the curve graph for the running of lens driver shown in explanation figure 36.

Figure 39 shows the state moving in the direction of the optical axis of lens driver shown in Figure 36.

Figure 40 be show in the lens driver according to fourth embodiment according to the electricity supplied to first coil The curve graph of the displacement of the movable units of stream.

Figure 41 shows the cross-sectional view of the lens driver according to 4-2 embodiment.

Figure 42 shows the cross-sectional view of the lens driver according to 4-3 embodiment.

Figure 43 a and 43b respectively illustrate the cross-sectional view of the embodiment of bipolar magnetised magnets shown in Figure 42.

Figure 44 shows the cross-sectional view of the lens driver according to 4-4 embodiment.

Figure 45 shows the cross-sectional view of the lens driver according to 4-5 embodiment.

Figure 46 shows the cross-sectional view of the lens driver according to 4-6 embodiment.

Figure 47 be show in the lens driver shown in Figure 45 and Figure 46 according to the electricity supplied to first coil The curve graph of the displacement of the movable units of stream.

Figure 48 is that the position under the corresponding arrangement relation shown between position sensor and bipolar magnetised magnets passes The curve graph of the magnetic field strength of sensor sensing, magnetic field strength become according to movable units moving distance in the direction of the optical axis Change.

Figure 49 a and Figure 49 b are to show the curve graph of the displacement of the magnetic field strength according to position sensor sensing.

Figure 50 is for explaining the moving distance according to movable units in the lens driver according to comparative example Magnetic field strength variation curve graph.

Figure 51 is to show the position of the movement according to movable units in lens driver according to the embodiment The curve graph of the variation in the magnetic field of sensor sensing.

Embodiment is related to a kind of lens driver and the camera module comprising the lens driver.