Automatic focusing and anti-shake integrated camera module of image sensor and mobile terminal

Abstract

The utility model relates to an image sensor automatic focusing and anti-shake integrated camera module and a mobile terminal. The image sensor automatic focusing and anti-shake integrated camera module comprises a flexible circuit board; the metal suspension plate comprises an outer frame, a first suspension part and a second suspension part; the magnet fixing frame is mounted on the first suspension part of the metal suspension plate; the magnet is mounted on the magnet fixing frame; the PCB is mounted on the second suspension part of the metal suspension plate; the image sensor is mounted on the PCB; the optical filter base is mounted on the PCB; the optical filter is mounted on the optical filter base; the Z-direction coil is mounted on the optical filter base; the motor bracket is mounted on the outer frame of the metal suspension plate; the X / Y circuit board is mounted on the motor bracket; the X / Y direction coil is mounted on the X / Y circuit board; and the lens assembly is mounted on the motor bracket. According to the utility model, translation of the image sensor in X, Y and Z directions and rotation around the optical axis of the image sensor are realized.

Description

Technical Field

[0001] The utility model relates to the technical field of camera modules, and in particular to an image sensor automatic focusing and anti-shake integrated camera module and a mobile terminal. Background Art

[0002] With the rapid development of mobile phone camera technology, image stabilization technology has become an important means to improve shooting quality. Existing stabilization technologies mainly include electronic image stabilization (EIS) and optical image stabilization (OIS). Among them, electronic image stabilization is the post-processing of the image, such as stretching and cropping. Optical image stabilization achieves clear and stable images by precisely moving the lens, or the image sensor, or moving the entire camera module. However, the existing Sensor shift technology (image stabilization technology) on the market can only achieve translation in the X and Y directions and rotation around the optical axis of the image sensor. For movement in the Z direction, it still depends on the AF motor to move the lens.

[0003] Therefore, it is necessary to develop an image sensor autofocus and anti-shake integrated camera module and a mobile terminal. Summary of the invention

[0004] The utility model aims to provide an image sensor auto-focus and anti-shake integrated camera module and a mobile terminal, so as to realize the translation of the image sensor in three directions of X, Y and Z and the rotation around the optical axis of the image sensor.

[0005] In a first aspect, the utility model provides an image sensor auto-focus and anti-shake integrated camera module, comprising:

[0006] Flexible circuit board;

[0007] A metal suspension plate, comprising an outer frame, a first suspended portion and a second suspended portion, wherein the second suspended portion is connected to the first suspended portion and can move relative to the first suspended portion in a Z direction; the first suspended portion is connected to the outer frame, and the first suspended portion and the second suspended portion can move relative to the outer frame in an X direction and a Y direction together; the outer frame is fixedly mounted on the flexible circuit board;

[0008] A magnet fixing frame, which is mounted on the first suspended portion of the metal suspension plate;

[0009] A magnet, which is mounted on the magnet fixing frame;

[0010] A PCB board mounted on the second suspended portion of the metal suspension plate;

[0011] An image sensor is mounted on the PCB;

[0012] A filter base, which is mounted on the PCB;

[0013] A filter, which is mounted on the filter base and is located directly above the image sensor;

[0014] A Z-direction coil is mounted on the filter base. When the Z-direction coil conducts current, it generates a vertical force according to electromagnetic induction to drive the second suspended portion of the metal suspension plate to move in the Z direction to achieve automatic focusing of the image sensor;

[0015] A motor bracket mounted on the outer frame of the metal suspension plate or the flexible circuit board;

[0016] X / Y circuit board, which is mounted on the motor bracket;

[0017] An X / Y direction coil is mounted on the X / Y circuit board and is located directly above the magnet. When current is conducted, the X / Y direction coil generates a horizontal force according to electromagnetic induction, driving the first suspended portion and the second suspended portion of the metal suspension plate to move in the horizontal direction, so as to achieve anti-shake of the image sensor;

[0018] The lens assembly is mounted on the motor bracket.

[0019] Optionally, the first suspended portion of the metal suspension plate is connected to the second suspended portion via a first flexible connector.

[0020] Optionally, the first suspended portion of the metal suspension plate is connected to the outer frame via a second flexible connector.

[0021] Optionally, there are four magnets, which are respectively arranged on the front, back, left and right sides of the image sensor;

[0022] The X / Y direction coil includes four coils, and the four coils are respectively arranged in one-to-one correspondence with the four magnets.

[0023] Optionally, the Z-direction coil is a ring-shaped member;

[0024] An installation groove matched with the Z-direction coil is provided on the outer surface of the filter base, the Z-direction coil is sleeved on the installation groove, and the Z-direction coil is located on the inner side of the four magnets.

[0025] Optionally, coil positioning holes are provided on the motor bracket at positions corresponding to the magnets, and the four coils on the X / Y direction coils are respectively located in the four coil positioning holes.

[0026] Optionally, the lens assembly comprises:

[0027] A lens fixing bracket, which is mounted on the motor bracket;

[0028] The lens is mounted on a lens mounting bracket.

[0029] Optionally, the first suspended portion of the metal suspension plate is located inside the outer frame; and the second suspended portion is located inside the first suspended portion.

[0030] In a second aspect, a mobile terminal described in the present invention adopts the image sensor autofocus and anti-shake integrated camera module described in the present invention.

[0031] The utility model has the following advantages:

[0032] (1) The utility model realizes the translation of the image sensor in the X, Y, and Z directions and the rotation around the optical axis of the image sensor through the principle of electromagnetic induction, without relying on an additional AF motor to move the lens, thus simplifying the structure of the camera module, improving the anti-shake effect, and reducing the manufacturing cost.

[0033] (2) Compared with the traditional sensor shift module with the same pixel, the image sensor autofocus and anti-shake integrated camera module described in the utility model has a new AF design (moving image sensor) with less thrust and power consumption. This means that during the autofocus process, the image sensor can be moved into position more efficiently and quickly while reducing energy consumption.

[0034] (3) In the traditional design, OIS (optical image stabilization) and AF are two separate structural parts. In the present invention, OIS and AF are designed as an integrated type, that is, they share the same metal suspension plate. This design makes the entire camera module more compact and helps to reduce the size of the camera module. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a cross-sectional view of the image sensor autofocus and anti-shake integrated camera module described in the embodiment of the present application;

[0036] Figure 2 This is a parsing diagram of the image sensor autofocus and anti-shake integrated camera module described in the embodiment of the present application;

[0037] Figure 3 This is a schematic diagram of the structure of the metal suspension plate described in the embodiment of the present application;

[0038] Explanation of the accompanying drawings: 1. Flexible circuit board, 2. Metal suspension plate, 2a. Outer frame, 2b. First suspended part, 2c. Second suspended part, 2d. First flexible connector, 2e. Second flexible connector, 3. PCB board, 4. Image sensor, 5. Electronic components, 6. Motor bracket, 6a. Coil positioning hole, 7. Filter, 8. Lens fixing frame, 9. Lens, 10. Filter base, 10a. Mounting groove, 11. X / Y circuit board, 12. X / Y direction coil, 13. Z direction coil, 14. Magnet, 15. Magnet fixing frame, 16. Connector. DETAILED DESCRIPTION

[0039] The following will refer to the accompanying drawings and preferred embodiments to illustrate the implementation of the technical solution of the utility model. Those skilled in the art can easily understand other advantages and effects of the utility model from the contents disclosed in this specification. The utility model can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the utility model. It should be understood that the preferred embodiments are only for illustrating the utility model, not for limiting the scope of protection of the utility model.

[0040] like Figures 1 to 3As shown, in the embodiment of the present application, an image sensor autofocus and anti-shake integrated camera module includes a flexible circuit board 1, a metal suspension board 2, a magnet fixing frame 15, a magnet 14, a PCB board 3, an image sensor 4, a filter base 10, a filter 7, a Z direction coil 13, a motor bracket 6, an X / Y circuit board 11, an X / Y direction coil 12 and a lens assembly. Among them, the metal suspension board 2 includes an outer frame 2a, a first suspended portion 2b and a second suspended portion 2c, the second suspended portion 2c is connected to the first suspended portion 2b, and the second suspended portion 2c can move in the Z direction relative to the first suspended portion 2b. The first suspended portion 2b is connected to the outer frame 2a, and the first suspended portion 2b and the second suspended portion 2c can move together in the X direction and the Y direction relative to the outer frame 2a. The outer frame 2a is fixedly mounted on the flexible circuit board 1. The magnet fixing frame 15 is mounted on the first suspended portion 2b of the metal suspension board 2. The magnet 14 is mounted on the magnet fixing frame 15. The PCB board 3 is mounted on the second suspended portion 2c of the metal suspension board 2. The image sensor 4 is mounted on the PCB board 3. The filter base 10 is mounted on the PCB board 3. The filter 7 is mounted on the filter base 10 and is located directly above the image sensor 4. The Z-direction coil 13 is mounted on the filter base 10. When the current is turned on, the Z-direction coil 13 generates a vertical force according to electromagnetic induction, driving the second suspended portion 2c of the metal suspension board 2 to move in the Z direction to achieve automatic focusing of the image sensor 4. The motor bracket 6 is mounted on the outer frame 2a of the metal suspension board 2 or the flexible circuit board 1. The X / Y circuit board 11 is mounted on the motor bracket 6. The X / Y direction coil 12 is mounted on the X / Y circuit board 11 and is located directly above the magnet 14. When the current is turned on, the X / Y direction coil 12 generates a horizontal force according to electromagnetic induction, driving the first suspended portion 2b and the second suspended portion 2c of the metal suspension board 2 to move in the horizontal direction to achieve anti-shake of the image sensor 4. The lens assembly is mounted on the motor bracket 6 .

[0041] like Figure 1 and Figure 2As shown, in the embodiment of the present application, the image sensor 4 mainly converts the received optical signal into an electrical signal. The PCB board 3 mainly carries the functions of the image sensor 4 and the electronic components 5. The magnet fixing frame 15 is mainly used to carry the magnet 14. The lens 9 mainly gathers the optical signal to be photographed and transmits it to the image sensor 4. The filter 7 is used to filter out the unnecessary components in the light collected by the lens 9 to improve the quality of the image. The motor bracket 6 mainly carries the lens fixing frame 8 and the X / Y direction coil 12. The filter base 10 mainly carries the filter 7 and the Z direction coil 13. The outer frame 2a of the metal suspension plate 2 is used to connect the metal wire and connect with the flexible circuit board 1, the first suspended part 2b is used to carry the magnet fixing frame 15 and the magnet 14, and the second suspended part 2c is used to carry the PCB board 3, the image sensor 4, the filter 7, the filter base 10 and the Z direction coil 13. At the same time, a connector 16 is provided on the flexible circuit board 1, and the signal of the camera module is transmitted to the whole machine mainboard through the connector 16.

[0042] like Figure 1 and Figure 2 As shown, the working principle of the image sensor autofocus and anti-shake integrated camera module described in the embodiment of the present application is as follows:

[0043] When the image sensor 4 needs to be automatically focused, current is passed through the Z-direction coil 13, and the Z-direction coil 13 cooperates with the magnet 14 to generate a Lorentz force, driving the filter 7, the filter base 10, the Z-direction coil 13, the image sensor 4, the PCB board 3, and the second suspended portion 2c of the metal suspension plate 2 to move together in the Z direction, thereby achieving automatic focusing of the image sensor 4.

[0044] When the image sensor 4 needs to be anti-shake, current is passed through the X / Y direction coil 12, and the X / Y direction coil 12 cooperates with the magnet 14 to generate a Lorentz force, driving the filter 7, the filter base 10, the Z direction coil 13, the image sensor 4, the PCB board 3, the magnet 14, the magnet fixing frame 15 and the first suspended portion 2b and the second suspended portion 2c of the metal suspension plate 2 to move together, thereby realizing anti-shake of the image sensor 4, wherein the Z direction refers to the vertical direction, the X direction is the front-to-back direction, and the Y direction is the left-to-right direction.

[0045] When rotation around the optical axis of the image sensor is required, there are four coils on the X / Y direction coil 12, of which there are two coils in the X direction and two coils in the Y direction. For the two coils in the X direction, a positive current is given to one of the coils and a negative current is given to the other coil. When the current directions are different, the directions of the Lorentz forces received are also different. The same is true for the Y direction. At this time, the X direction and the Y direction act simultaneously to achieve rotation around the optical axis (i.e., the Z axis) of the image sensor.

[0046] like Figure 2As shown, in a possible embodiment, the first suspended portion 2b of the metal suspension plate 2 is connected to the second suspended portion 2c via a first flexible connector 2d. The first suspended portion 2b of the metal suspension plate 2 is connected to the outer frame 2a via a second flexible connector 2e.

[0047] like Figure 1 and Figure 2 As shown, in a possible embodiment, there are four magnets 14 , which are respectively arranged on the front, back, left and right sides of the image sensor 4 ; the X / Y direction coil 12 includes four coils, and the four coils are respectively arranged in one-to-one correspondence with the four magnets 14 .

[0048] like Figure 2 As shown, in a possible embodiment, the Z-direction coil 13 is an annular member; a mounting groove 10a adapted to the Z-direction coil 13 is provided on the outer surface of the filter base 10, the Z-direction coil 13 is mounted on the mounting groove 10a, and the Z-direction coil 13 is located on the inner side of the four magnets 14.

[0049] like Figure 1 As shown, in a possible embodiment, the motor bracket 6 is provided with coil positioning holes 6 a at positions corresponding to the magnets 14 , and the four coils on the X / Y direction coil 12 are respectively located in the four coil positioning holes 6 a .

[0050] like Figure 1 As shown, in a possible embodiment, the lens assembly includes a lens fixing frame 8 and a lens 9 , wherein the lens fixing frame 8 is mounted on the motor bracket 6 , and the lens 9 is mounted on the lens fixing frame 8 .

[0051] like Figure 2 As shown, in a possible embodiment, the first suspended portion 2b of the metal suspension plate 2 is located inside the outer frame 2a; and the second suspended portion 2c is located inside the first suspended portion 2b.

[0052] In an embodiment of the present application, a mobile terminal adopts the image sensor autofocus and anti-shake integrated camera module as described in the embodiment of the present application.

[0053] The above-mentioned embodiments are preferred implementation modes of the present invention, but the implementation modes of the present invention are not limited by the above-mentioned embodiments. Any other changes, modifications, substitutions, combinations and simplifications made without departing from the spirit and principle of the present invention shall be equivalent replacement modes and shall be included in the protection scope of the present invention.

Claims

1. An image sensor auto-focus and anti-shake integrated camera module, characterized in that: include: Flexible circuit board (1); A metal suspension plate (2), comprising an outer frame (2a), a first suspended portion (2b) and a second suspended portion (2c), wherein the second suspended portion (2c) is connected to the first suspended portion (2b), and the second suspended portion (2c) can move in the Z direction relative to the first suspended portion (2b); the first suspended portion (2b) is connected to the outer frame (2a), and the first suspended portion (2b) and the second suspended portion (2c) can move together in the X direction and the Y direction relative to the outer frame (2a); the outer frame (2a) is fixedly mounted on the flexible circuit board (1); A magnet fixing frame (15) mounted on the first suspended portion (2b) of the metal suspension plate (2); A magnet (14) mounted on the magnet fixing frame (15); A PCB board (3) mounted on the second suspended portion (2c) of the metal suspension plate (2); An image sensor (4) mounted on the PCB board (3); A filter base (10) mounted on the PCB board (3); A filter (7) mounted on the filter base (10) and located directly above the image sensor (4); A Z-direction coil (13) mounted on the filter base (10), wherein when current is conducted, the Z-direction coil (13) generates a vertical force according to electromagnetic induction, thereby driving the second suspended portion (2c) of the metal suspension plate (2) to move in the Z direction; A motor bracket (6) mounted on an outer frame (2a) of the metal suspension plate (2) or a flexible circuit board (1); An X / Y circuit board (11) mounted on the motor bracket (6); An X / Y direction coil (12) is mounted on the X / Y circuit board (11) and is located directly above the magnet (14); when current is conducted, the X / Y direction coil (12) generates a horizontal force according to electromagnetic induction, thereby driving the first suspended portion (2b) and the second suspended portion (2c) of the metal suspension plate (2) to move in the horizontal direction; The lens assembly is mounted on the motor bracket (6).

2. The image sensor auto-focus and anti-shake integrated camera module according to claim 1, characterized in that: The first suspended portion (2b) of the metal suspension plate (2) is connected to the second suspended portion (2c) via a first flexible connecting member (2d).

3. The image sensor auto-focus and anti-shake integrated camera module according to claim 1, characterized in that: The first suspended portion (2b) of the metal suspension plate (2) is connected to the outer frame (2a) via a second flexible connecting member (2e).

4. The image sensor auto-focus and anti-shake integrated camera module according to claim 1, characterized in that: There are four magnets (14), which are arranged respectively on the front, back, left and right sides of the image sensor (4); The X / Y direction coil (12) comprises four coils, and the four coils are respectively arranged in one-to-one correspondence with the four magnets (14).

5. The image sensor auto-focus and anti-shake integrated camera module according to claim 4, characterized in that: The Z-direction coil (13) is a ring-shaped part; A mounting groove (10a) adapted to the Z-direction coil (13) is provided on the outer surface of the filter base (10); the Z-direction coil (13) is sleeved on the mounting groove (10a), and the Z-direction coil (13) is located on the inner side of the four magnets (14).

6. The image sensor auto-focus and anti-shake integrated camera module according to claim 4, characterized in that: The motor bracket (6) is provided with coil positioning holes (6a) at positions corresponding to the magnets (14), and the four coils on the X / Y direction coil (12) are respectively located in the four coil positioning holes (6a).

7. The image sensor auto-focus and anti-shake integrated camera module according to claim 1, characterized in that: The lens assembly comprises: A lens fixing frame (8) mounted on the motor bracket (6); A lens (9) is mounted on the lens fixing frame (8).

8. The image sensor auto-focus and anti-shake integrated camera module according to claim 1, characterized in that: The first suspended portion (2b) of the metal suspension plate (2) is located inside the outer frame (2a); and the second suspended portion (2c) is located inside the first suspended portion (2b).

9. A mobile terminal, characterized in that: An image sensor autofocus and anti-shake integrated camera module as described in any one of claims 1 to 8 is used.

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