TWM515654U - Camera module - Google Patents

Description

Camera module

The present invention is a camera module, and more particularly to a camera module that can produce a linear and uniform force and can further reduce the volume.

Due to advances in technology, the size of digital cameras has been shrinking, and many small electronic devices, such as mobile phones, have been built with digital cameras, thanks to the miniaturization of optical imaging devices. The most commonly used miniature lens used today is the voice coil motor (VCM), which uses a combination of coils, magnets, and shrapnel to carry a lens to move back and forth in the direction of the imaging optical axis to achieve autofocus or zoom. And the requirements for camera quality and function are gradually increasing. For example: tens of pixels, anti-shake and other functions to distinguish between high-end cameras and low-order.

In an optical system composed of an optical imaging device and an image compensating module, an optical system such as a camera or a camera often causes a shock shift of the light path due to an external force factor or a jitter in a hand-held camera or a camera. The imaging on the image compensation module is unstable, which causes the captured image to be blurred. The most common solution is to provide a compensation mechanism for such image blur caused by vibration. To make the image captured by the optical imaging device clear, and the compensation mechanism can be a digital compensation mechanism or an optical compensation mechanism. The so-called digital compensation mechanism is to analyze and process the digital image data captured by the image compensation module through software to obtain clear digital images. This method is also often called digital anti-vibration mechanism. As for the optical compensation mechanism, the vibration compensation device is usually disposed on the optical imaging device or the image compensation module, and such a method is also often referred to as an optical anti-vibration mechanism.

a general optical anti-shock mechanism that utilizes straight strips A flexible member formed of a metal wire carries an optical imaging device over a circuit substrate having an image sensor. This optical imaging device includes a lens and a lens holding portion. When the optical imaging device is a zoom or focus lens group, the lens located in the optical imaging device can be moved in a certain direction with respect to the lens holding portion. When a shock occurs, a relative displacement occurs between the optical imaging device and the circuit substrate. At this time, the relative displacement sensor and the position motion detector can transmit the displacements of the X-axis and the Y-axis between the optical imaging device and the circuit substrate to an anti-vibration control unit, and control a mobile drive unit to be driven according to the displacement amount thereof. The optical imaging device performs a compensating motion corresponding to the circuit substrate to prevent the image sensor from being blurred due to vibration. However, such a configuration directly increases the overall volume due to the arrangement of the anti-vibration control unit and the moving drive unit, so that the overall X-Y axis cannot be further reduced in area parallel to the surface of the optical imaging device.

As can be seen from the above, most of the optical anti-vibration mechanisms currently known are Involving complex or bulky bulky mechanisms or components, so there are complex structures, difficult assembly, high cost, or the volume cannot be further reduced. Disadvantages, so the relevant industry are seeking solutions.

Therefore, the present invention provides a camera module that utilizes a special The first coil of the shape compensates for the forces generated by the two actuators in the same direction, thereby making the force more linear and uniform. In addition, the first coil of the special shape is matched with the structure of the corresponding magnetic member and the second coil, so that the volume of the entire structure can be further reduced, thereby saving cost and reducing weight.

One embodiment of the present invention is a camera module including An actuator comprising a first coil and a magnetic member. The first coil has a side portion and a lower portion, and the side portions and the lower portion are connected to each other and intersect at an angle. The magnetic member has a first side and a second side, and the first side and the second side are adjacent to each other and respectively correspond to the side and the lower part of the first coil.

Thereby, the camera module of the present invention utilizes a special shape A coil with a corresponding magnetic member and a second coil structure can reduce the volume of the entire structure.

Other embodiments in accordance with the foregoing embodiments are as follows: The machine module is used for auto focus or anti-shake, wherein the first coil is connected with a first current, and the first current is affected by the magnetic member to generate a first force, and the actuator is displaced toward the first force. An offset. Furthermore, the aforementioned angle may be greater than or equal to 70 degrees and less than or equal to 110 degrees. In detail, the aforementioned angle may be 90 degrees. In addition, the camera module may include a second coil corresponding to the actuator and having a second current, and the second current is affected by The magnetic member exerts a second force to displace the second coil in the direction of the second force. The magnetic member may include a third side adjacent to the second side and corresponding to the second coil. The camera module may include an optical imaging device corresponding to the third side and connected to the second coil, and the optical imaging device is displaced by the second coil. In addition, the camera module may include a seat body and a spring module. Wherein the seat can carry the actuator and connect the lower portion of the first coil. The spring module is connected to the base body and includes a spring piece, a spring wire and a spring piece. The upper elastic piece is disposed above the actuator, and the upper elastic piece is fitted to the optical imaging device. The two ends of the elastic wire are respectively connected with the elastic piece and the seat body. The lower elastic piece is disposed on the base body, and the lower elastic piece can be fitted to the optical imaging device. Furthermore, the camera module may include a control circuit disposed on the base and electrically connected to the second coil, and the control circuit controls the magnitude and direction of the second current.

Another embodiment of the present invention is a camera module for Autofocus or anti-shake, which contains two corresponding electromagnetic drive modules, which are linked to each other. Each electromagnetic drive module includes an actuator and a second coil. Wherein the actuator generates a magnetic flux, and the actuator comprises a first coil having a side portion and a lower portion, the side portions and the lower portion being connected to each other and intersecting at an angle. The first coil is connected to a first current, and the first current is affected by the magnetic flux to generate a first force, and the first coil is displaced in the direction of the first force. In addition, the second coil corresponds to the actuator and is connected with a second current, which is affected by the magnetic flux to generate a second force, and the second coil is displaced in the direction of the second force.

Thereby, the camera module of the present invention transmits through a special shape A coil compensates the forces generated by the two actuators in the same direction, thereby making the force more linear and uniform.

Other implementations in accordance with the foregoing embodiments are as follows: Two second coils can be located between the two actuators. Each of the foregoing actuators may include a magnetic member that generates magnetic flux and has a first side, a second side, and a third side. The first side is adjacent to the second side and respectively corresponds to a side and a lower portion of one of the first coils, and the third side is adjacent to the second side and corresponds to one of the second coils. Additionally, the aforementioned two actuators may be located between the two second coils. The aforementioned angle may be greater than or equal to 70 degrees and less than or equal to 110 degrees. In detail, the aforementioned angle may be 90 degrees. The camera module can include an optical imaging device, a body, and a control circuit. The optical imaging device can include two opposite sides, the two sides being respectively connected to the two second coils. The seat body carries the two electromagnetic drive modules and connects the lower parts. The control circuit is disposed on the base body and electrically connected to the second coil, and the control circuit can control the magnitude and direction of the second current of each of the second coils. In addition, the camera module may include a spring module, and the spring module is coupled to the body and includes an upper elastic piece, a spring wire and a lower elastic piece. The upper elastic piece is disposed above the two electromagnetic driving modules, and the upper elastic piece is fitted with the optical imaging device. The two ends of the elastic wire are respectively connected with the elastic piece and the seat body. The lower elastic piece is disposed on the base body, and the lower elastic piece can be fitted to the optical imaging device.

100‧‧‧ camera module

200‧‧‧Electromagnetic drive module

202‧‧‧Actuator

204‧‧‧second coil

210‧‧‧First coil

212‧‧‧ side

214‧‧‧ lower

220‧‧‧Magnetic parts

222‧‧‧ first side

224‧‧‧ second side

226‧‧‧ third side

300‧‧‧Optical imaging device

310‧‧‧ lens

320‧‧‧Lens mount

400‧‧‧ body

402‧‧‧The upper body

404‧‧‧ Lower body

500‧‧‧Bounce module

510‧‧‧Upper film

520‧‧‧Bottom line

530‧‧‧Shear

532‧‧‧Perforation

600‧‧‧Control circuit

Θ‧‧‧ angle

B1, B2‧‧‧ flux

I1‧‧‧First current

I2‧‧‧second current

F1‧‧‧ first force

F2‧‧‧second force

○, ×‧‧‧current flow

N, S‧‧‧ magnetic pole

FIG. 1 is a perspective view of a camera module according to an embodiment of the present invention.

Figure 2 is an exploded view of the camera module of Figure 1.

Fig. 3 is a cross-sectional view of Fig. 1.

Fig. 4A is a cross-sectional view taken along line 4-4 of Fig. 1.

FIG. 4B is a schematic diagram showing current and force of the embodiment of FIG. 4A.

FIG. 4C is a schematic diagram showing current and force of another embodiment of FIG. 4A.

FIG. 5 is a schematic diagram of a camera module according to another embodiment of the present invention.

Hereinafter, a plurality of embodiments of the present invention will be described with reference to the drawings. For the sake of clarity, many practical details will be explained in the following description. However, it should be understood that these practical details are not intended to limit the novel. That is to say, in some embodiments of the present invention, these practical details are not necessary. In addition, some of the conventional structures and elements are illustrated in the drawings in a simplified schematic manner, and the repeated elements may be represented by the same reference numerals.

Please refer to Figures 1~4A together. Figure 1 shows the novel A schematic diagram of a camera module 100 of an embodiment. FIG. 2 is an exploded view of the camera module 100 of FIG. 1. Fig. 3 is a cross-sectional view of Fig. 1. Fig. 4A is a cross-sectional view taken along line 4-4 of Fig. 1. As shown in the figure, the camera module 100 includes four electromagnetic driving modules 200, an optical imaging device 300, a base 400, a spring module 500, and a control circuit 600.

Each electromagnetic drive module 200 includes an actuator 202 and a second Coil 204. The actuator 202 includes a first coil 210 and a magnetic member 220. The first coil 210 has a side portion 212 and a lower portion 214, and the side portion 212 and the lower portion 214 are connected to each other and intersect at an angle θ. This angle θ may be greater than or equal to 70 degrees and less than or equal to 110 degrees. In the present embodiment, the angle θ is 90 degrees. In other words, the first coil 210 of the present embodiment is L-shaped. Moreover, the magnetic member 220 has a first side surface 222, a second side surface 224 and a third side surface 226. The first side surface 222 and the second side surface 224 are adjacent to each other and respectively correspond to the side portion 212 and the lower portion 214 of the first coil 210. The third side 226 is adjacent to the second side 224 and corresponds to the second coil 204. The magnetic member 220 can be a general magnet and has a rectangular column shape. It can be seen that the first coil 210 and the second coil 204 share the same magnetic member 220, and the common advantage is that the volume of the entire camera module 100 can be greatly reduced, thereby saving cost and reducing weight. In addition, the camera module 100 includes four sets of electromagnetic driving modules 200, wherein the two sets of electromagnetic driving modules 200 extend in parallel with the X axis, and the other two sets of electromagnetic driving modules 200 extend in parallel with the Y axis. The four sets of electromagnetic drive modules 200 of this embodiment are wound into a square shape. Of course, it can also be surrounded by a circular or other symmetrical regular polygon. Through the symmetrical L-shaped first coil 210, the forces of the two electromagnetic drive modules 200 in the same direction can be compensated for each other, and the force is relatively linear and uniform. In addition, in the present embodiment, the relative positions of the electromagnetic drive modules 200 are sequentially the first coil 210, the magnetic member 220, and the second coil 204, in the uniaxial direction (X or Y axis). That is, the two second coils 204 are located between the two corresponding actuators 202. Such a sandwich knot The configuration enables the first coil 210 to achieve an anti-shake effect while allowing the second coil 204 to perform an autofocus function. It is worth mentioning that the L-shaped first coil 210 can be used for anti-shake, auto focus or any other action requiring a displacement mechanism, and is not limited to the effect of preventing hand shake.

The optical imaging device 300 is disposed in the camera module 100 heart. The optical imaging device 300 includes a lens 310 and a lens carrier 320. The lens 310 is coupled to the lens carrier 320. The lens carrier 320 has four sides. The four sides are opposite each other, and each side is connected to a second coil 204. Each side of the optical imaging device 300 corresponds to the third side 226 of each of the magnetic components 220, and the opposite sides of the optical imaging device 300 are respectively connected to the second coils 204 of the two electromagnetic driving modules 200. Therefore, the two opposing electromagnetic components The driving modules 200 are connected to each other through the optical imaging device 300. When the electromagnetic driving module 200 is displaced, the optical imaging device 300 is displaced along with the second coil 204. Of course, the optical imaging device 300 can be connected to other image processing devices, such as an image sensor or an image processor. The structural details of these image processing apparatuses are well-known techniques and will not be described again.

The base 400 includes an upper body 402 and a lower base 404. on The body 402 surrounds the optical imaging device 300. The lower body 404 is located below the optical imaging device 300 and is connected to the lower portion 214 of the first coil 210. In addition, the lower body 404 can carry the electromagnetic driving module 200, the optical imaging device 300, and the elastic module 500.

The spring module 500 is coupled to the base 400 and includes a spring piece 510, the elastic wire 520 and the lower elastic piece 530. The upper elastic piece 510 is set on the electricity Above the magnetic drive module 200, the upper elastic piece 510 is fitted to the optical imaging device 300. In addition, the upper elastic piece 510 is electrically connected to the second coil 204. The two ends of the elastic wire 520 are respectively connected with the upper elastic piece 510 and the lower base body 404. The lower elastic piece 530 is disposed in the base 400. In detail, the lower elastic piece 530 is located between the upper body 402 and the lower base 404, and the lower elastic piece 530 is fitted to the optical imaging device 300. In addition, the lower elastic piece 530 has four through holes 532. The second coils 204 pass through the through holes 532 and are electrically connected to the control circuit 600 embedded in the lower base 404. The optical imaging device 300 and the upper base 402 are disposed on the lower elastic piece. Above 530.

The control circuit 600 is disposed on the lower body 404 and electrically connected Two coils 204. This control circuit 600 can control the magnitude and direction of the current of the second coil 204. In detail, the control circuit 600 first transmits the required current to the upper elastic piece 510 through the elastic wire 520, and then transmits the current to the second coil 204. Therefore, the present invention can adjust the optical imaging device 300 by controlling the current by the control circuit 600. Focus condition. As for the circuit details of the control circuit 600, which are conventional techniques, they will not be described again.

FIG. 4B is a diagram showing the current and function of the embodiment of FIG. 4A Schematic diagram of force. FIG. 4C is a schematic diagram showing current and force of another embodiment of FIG. 4A. As shown in the figure, the current flow in the figure ○ represents the current flowing out of the paper surface, the current flow direction x represents the current flowing into the paper surface, and the magnetic member 220 has the N magnetic pole and the S magnetic pole. The magnetic member 220 of the actuator 202 generates a magnetic flux B1, B2. The first coil 210 is connected to a first current I1, and the first current I1 is affected by the magnetic member 220 to generate a first force F1, so that the first coil 210 is displaced by an offset in the direction of the first force F1. Transfer amount In order to achieve the anti-shake effect of the actuator 202. Furthermore, the second coil 204 corresponds to the actuator 202 and is connected to a second current I2, and the second current I2 is affected by the magnetic member 220 to generate a second force F2, so that the second coil 204 faces the second force F2. The direction shifts by another offset, which allows the actuator 202 to achieve the effect of autofocus. It is worth mentioning that the structure can select the action of focusing or flipping the optical imaging device 300 by using the current direction control changes of the corresponding two second coils 204. When the current directions of the corresponding two second coils 204 are the same, the optical imaging device 300 can be tilted or flipped; when the current directions of the corresponding two second coils 204 are opposite, the optical imaging device 300 can adjust the focal length to complete Focus operation.

FIG. 5 is a diagram showing an electromagnetic drive of another embodiment of the present invention. A schematic diagram of module 200a. In the uniaxial direction (X or Y axis), in addition to the two second coils 204 being positionable between the two actuators 202, the two actuators 202 may also be located between the two second coils 204, as long as Focusing, flipping or anti-shake can be achieved by appropriately controlling the direction of the current in the first coil 210 and the second coil 204.

It can be seen from the above embodiments that the present invention has the following advantages: First, the first coil of a special shape is used to compensate the forces generated by the two actuators in the same direction, thereby making the force more linear and uniform. Secondly, the first coil of the special shape is matched with the structure of the corresponding magnetic component and the second coil, so that the volume of the entire structure can be further reduced, thereby saving cost and reducing weight.

Although the present invention has been disclosed as above in the embodiment, it is not In order to limit the present invention, any person skilled in the art can make various changes and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention is defined by the scope of the appended patent application. quasi.

100‧‧‧ camera module

200‧‧‧Electromagnetic drive module

202‧‧‧Actuator

204‧‧‧second coil

210‧‧‧First coil

212‧‧‧ side

214‧‧‧ lower

400‧‧‧ body

402‧‧‧The upper body

404‧‧‧ Lower body

500‧‧‧Bounce module

510‧‧‧Upper film

520‧‧‧Bottom line

530‧‧‧Shear

220‧‧‧Magnetic parts

532‧‧‧Perforation

300‧‧‧Optical imaging device

600‧‧‧Control circuit

310‧‧‧ lens

Θ‧‧‧ angle

320‧‧‧Lens mount

Claims (16)

A camera module includes: an actuator comprising: a first coil having a side portion and a lower portion, the side portion and the lower portion being connected to each other and intersecting an angle; and a magnetic member including a first side surface a second side, the first side and the second side are adjacent to each other and respectively correspond to the side of the first coil and the lower part. The camera module of claim 1, wherein the first coil is coupled to a first current, and the first current is affected by the magnetic member to generate a first force. And causing the actuator to be displaced by an offset in the direction of the first force. The camera module of claim 1, wherein the angle is greater than or equal to 70 degrees and less than or equal to 110 degrees. The camera module of claim 3, wherein the angle is 90 degrees. The camera module of claim 1, wherein the camera module further comprises: a second coil corresponding to the actuator and a second current, the first The second current is affected by the magnetic member to generate a second force, and the second coil is displaced in the direction of the second force. The camera module of claim 5, wherein the magnetic component further comprises a third side adjacent to the second side and corresponding to the second coil; the camera module further comprises an optical In the image device, the optical image device corresponds to the third side surface and is connected to the second coil, and the optical image device is displaced by the second coil. The camera module of claim 6, further comprising: a body carrying the actuator and connecting the lower portion; and a spring module coupled to the base body, the spring module comprising: An upper elastic piece is disposed above the actuator, the upper elastic piece is fitted to the optical imaging device; a spring wire, the two ends of the elastic wire are respectively connected to the upper elastic piece and the base body; and the lower elastic piece is disposed on the The base body, the lower elastic piece is fitted to the optical imaging device. The camera module of claim 7, further comprising: a control circuit disposed on the body and electrically connected to the second coil, the control circuit controlling the magnitude and direction of the second current. A camera module for autofocus or anti-shake, the camera module includes: Corresponding two electromagnetic driving modules, the two electromagnetic driving modules are interlocked with each other, and each of the electromagnetic driving modules comprises: an actuator for generating a magnetic flux, the actuator comprising a first coil, the first coil Having a side portion and a lower portion, the side portion and the lower portion are connected to each other and intersect at an angle, the first coil is connected to a first current, and the first current is affected by the magnetic flux to generate a first force, so that Disposing the first coil in the direction of the first force; and a second coil corresponding to the actuator and passing a second current, the second current being affected by the magnetic flux to generate a second force, The second coil is displaced in the direction of the second force. The camera module of claim 9, wherein the two second coils are located between the two actuators. The camera module of claim 10, wherein each of the actuators further comprises a magnetic member, the magnetic member generates the magnetic flux and has a first side, a second side and a third side. The first side is adjacent to the second side and respectively corresponds to the side of the first coil and the lower part, and the third side is adjacent to the second side and corresponds to one of the second coils. The camera module of claim 9, wherein the two actuators are located between the two second coils. The camera module of claim 9, wherein the angle is greater than or equal to 70 degrees and less than or equal to 110 degrees. The camera module of claim 13, wherein one of the angles is 90 degrees. The camera module of claim 9, further comprising: an optical imaging device, comprising two opposite sides, wherein the two sides are respectively connected to the two second coils; the body carries the two electromagnetic driving modules and Connecting the lower portion; and a control circuit disposed on the base and electrically connected to the second coil, the control circuit controlling the magnitude and direction of the second current of each of the second coils. The camera module of claim 15 further comprising: a spring module coupled to the body, the spring module comprising: a spring piece disposed above the electromagnetic drive module And the upper elastic piece is fitted to the optical imaging device; an elastic wire, the two ends of the elastic wire are respectively connected to the upper elastic piece and the base body; and the lower elastic piece is disposed on the base body, and the lower elastic piece is fitted to the optical imaging device .