Periscope camera module

Abstract

The present invention provides a periscope camera module, wherein the periscope camera module includes a camera module body, a reflective prism and a prism driving device, wherein the camera module body has an optical axis, and the reflective prism is arranged on the light incident side of the camera module body along the optical axis direction of the camera module body so that the reflective prism reflects external light to the camera module body, wherein the reflective prism is rotatably connected to the prism driving device, and the reflective prism is driven by the prism driving device to move so as to change the direction of the light emitted by the reflective prism and compensate for the optical jitter of the camera module body.

Description

Technical Field

[0001] The present invention relates to the field of camera modules, and in particular to a periscope camera module Background Art

[0002] In recent years, terminal devices with camera functions, such as smartphones, are required to have optical image stabilization (OIS) functions. In order to avoid the camera shaking caused by human factors that affects the clarity of the image, anti-shake technology is used to stabilize the image.

[0003] In the existing anti-shake solution, a reflector and a base supporting the reflector are provided, different pivots are used to support the reflector, and magnets, coils, Hall sensors, and components such as springs / suspension wires / ball bearings are used to control the reflector to avoid shaking during use. However, this solution has a complex structure, a large number of parts, and is difficult to produce and maintain. Coils and magnets are also generally large in size, which is not suitable for the trend of gradual miniaturization of portable terminals. At the same time, due to the current trend of increasing size and weight of prism or reflector products, the existing traditional anti-shake drive mechanism has insufficient thrust and is difficult to meet future development trends. Summary of the invention

[0004] A major advantage of the present invention is that it provides a periscope camera module, wherein the periscope camera module includes at least one piezoelectric drive device and a reflective prism, and the reflective prism is driven to move by the piezoelectric drive device, which helps to increase the force required for the movement of the reflective prism.

[0005] Another advantage of the present invention is that it provides a periscope camera module, wherein the driving axis in the reflective prism seat of the periscope camera module and the driving axis of the piezoelectric driving device are arranged on the same side, both are parallel to the optical axis of the lens group and are located in the same plane, which is beneficial to reducing the overall volume of the periscope camera module, achieving compact packaging of the module structure, and making the module structure more miniaturized.

[0006] Another advantage of the present invention is that it provides a periscope camera module, wherein the circuit setting of the periscope camera module in the continuous zoom module structure is optimized, so that the wiring space is narrower and the integration is higher.

[0007] Another advantage of the present invention is that it provides a periscope camera module, wherein the periscope camera module combines a piezoelectric structure with a reflective prism, and utilizes the large driving force and small size of the piezoelectric motor to drive the reflective prism to perform a higher-precision anti-shake function.

[0008] Another advantage of the present invention is that it provides a periscope camera module, wherein the piezoelectric motor used in the periscope camera module has large driving force and small size. The piezoelectric motor can replace large-size structures such as coils and magnets in existing anti-shake solutions. Traditional anti-shake drive mechanisms often have insufficient thrust. The use of piezoelectric motors can better solve this problem, which is beneficial to improving the stability of the module.

[0009] Another advantage of the present invention is that it provides a periscope camera module, wherein the circuit routing of the periscope camera module is arranged inside the bottom of the shell or attached to the surface of the second long side of the shell, effectively improving the internal space problem of the camera module, providing better space for the driving elements, and making the module structure more miniaturized, thereby achieving compact packaging of the module structure.

[0010] Another advantage of the present invention is that it provides a periscope camera module, wherein the periscope camera module utilizes piezoelectric elements to directly drive the lens group, further reducing the required size of the elements and achieving lateral size reduction, thereby reducing the overall volume and size of the module, and the structure tends to be miniaturized.

[0011] Another advantage of the present invention is that it provides a periscope camera module, wherein the periscope camera module further simplifies the assembly structure by optimizing the circuit settings in the continuous zoom module structure, facilitates assembly, reduces assembly steps, and saves costs.

[0012] Another advantage of the present invention is that it provides a periscope camera module, wherein the driving device of the periscope camera module directly drives the focus / focus lens group, thereby reducing the required size of the driving component.

[0013] Another advantage of the present invention is that it provides a periscope camera module, wherein the active element of the periscope camera module is configured adjacent to the driving focus / focus lens group, thereby reducing the module size or achieving compact packaging.

[0014] Another advantage of the present invention is that it provides a periscope camera module, which further simplifies the assembly structure of the periscope camera module, facilitates assembly, reduces assembly steps, and helps improve production and processing efficiency.

[0015] According to one aspect of the present invention, a periscope camera module of the present invention that can achieve the aforementioned objectives and other objectives and advantages includes:

[0016] A camera module body;

[0017] a reflecting prism, wherein the camera module body has an optical axis, and the reflecting prism is arranged on the light incident side of the camera module body along the optical axis direction of the camera module body, so that the reflecting prism reflects external light to the camera module body;

[0018] a prism drive device, wherein the reflective prism is drivably connected to the prism drive device, wherein the prism drive device comprises a prism drive shaft and a piezoelectric driver, wherein the piezoelectric driver and the prism drive shaft are fixedly connected, and the prism drive shaft is parallel to the optical axis direction of the camera module body, wherein the prism drive shaft moves linearly along the optical axis direction under the driving action of the piezoelectric driver to change the direction of the light emitted from the reflective prism and compensate for the optical jitter of the camera module body; and

[0019] At least one lens driving device, wherein the lens driver is drivingly connected to the lens group, and the lens driver drives the lens group to move along a specific direction, wherein the lens driving device includes a piezoelectric driving shaft and a vibration component, wherein the piezoelectric driving shaft is parallel to the optical axis of the camera module body, and one end of the piezoelectric driving shaft is fixed, wherein the prism driving shaft of the prism driving device and the piezoelectric driving shaft of the lens driving device are located on the same side of the positive direction of the reference axis X-axis inside the shell, and are both parallel to the optical axis of the lens group.

[0020] According to one embodiment of the present invention, a prism seat is further included, wherein the reflective prism is arranged on the prism seat, and the prism seat is drivingly connected to the prism driving device, the prism driving device drives the prism seat, and then the prism seat drives the reflective prism to move synchronously.

[0021] According to one embodiment of the present invention, the reflecting prism further has an inclined surface, and the prism seat has a supporting surface, wherein the inclined surface of the reflecting prism is supported on the supporting surface of the prism seat, and the inclined surface of the reflecting prism is in contact with the supporting surface of the prism seat.

[0022] According to one embodiment of the present invention, it further includes a transmission device, wherein the transmission device is drivably connected to the prism driving device and the prism seat, wherein the transmission device can be driven by the prism driving device, and the prism seat is driven in a rotational manner by the transmission device.

[0023] According to one embodiment of the present invention, the prism drive shaft is vertically connected to the transmission device, the prism drive shaft is perpendicular to the transmission device, and the transmission device converts the linear motion of the prism drive shaft into rotational motion around the reference axis X-axis direction to change the direction of the output light of the reflection prism.

[0024] According to one embodiment of the present invention, the transmission device further includes a shaft seat and a transmission shaft arranged on the shaft seat, wherein the shaft seat is arranged on the prism seat, and the shaft seat is located at the supporting surface of the prism seat and the corresponding surface of the reflecting prism.

[0025] According to one embodiment of the present invention, the transmission shaft of the transmission device is driven by the prism driving shaft as a guide mechanism, and converted into a driving force for driving the prism seat to rotate, so as to drive the prism seat to rotate around the direction perpendicular to the reference axis X.

[0026] According to one embodiment of the present invention, the piezoelectric driver includes a piezoelectric element, the piezoelectric element has a stacked structure, and the piezoelectric element includes a plurality of piezoelectric telescopic bodies and a plurality of internal electrodes, the internal electrodes are a plurality of electrodes formed by alternately stacking a plurality of piezoelectric telescopic bodies, and the plurality of piezoelectric telescopic bodies and the plurality of internal electrodes are stacked on each other.

[0027] According to one embodiment of the present invention, the prism driving device includes a piezoelectric motor and a crank slider mechanism, wherein the piezoelectric motor is transmission-connected to the crank slider mechanism, wherein the crank slider mechanism is transmission-connected to the prism seat, and the piezoelectric motor drives the prism seat and the reflecting prism to move through the crank slider mechanism.

[0028] According to one embodiment of the present invention, the crank slider mechanism further includes a crank, a slider and a connecting shaft, wherein the slider is drivingly connected to the piezoelectric motor, and the piezoelectric motor drives the slider to move linearly along the optical axis.

[0029] According to an embodiment of the present invention, the connecting axis is parallel to the reference axis X, and the crank is parallel to the plane where the optical axis of the lens group and the reference axis Y are located.

[0030] According to one embodiment of the present invention, the prism driving device further includes a guiding element, wherein one end of the guiding element is connected to the slider, and the other end is connected to the prism seat. When the piezoelectric motor applies a driving force, it drives the slider to move linearly, and the crank and the connecting shaft will also move accordingly. The connecting shaft can maintain relative motion between the slider and the crank.

[0031] According to one embodiment of the present invention, the camera module body includes a lens group, an image sensor arranged along the optical axis direction, and a shell for fixing the lens group and the image sensor.

[0032] According to one embodiment of the present invention, the circuit wiring of the camera module is arranged on the inner side of the bottom of the shell; or the circuit of the camera module is attached to a side surface inside the shell.

[0033] According to one embodiment of the present invention, the camera module body further includes at least one lens driving device, wherein the lens driver is drivingly connected to the lens group, and the lens driver drives the lens group to move in a specific direction to adjust the focal length of the entire system.

[0034] According to one embodiment of the present invention, the lens group further includes a first lens group, a second lens group and a third lens group, wherein the reflecting prism is located at an object side end of the first lens group of the lens group, wherein the light reflected by the reflecting prism passes through the first lens group to the second lens group, the second lens group is located at the light exit side of the first lens group, and the third lens group is located at the light exit side of the second lens group.

[0035] According to one embodiment of the present invention, the lens driving device further includes a first lens driving unit and a second lens driving unit, wherein the first lens driving unit is drivingly connected to the second lens assembly, and the first lens driving unit drives the second lens assembly to move horizontally and laterally along the optical axis to adjust the focal length of the entire system; the second lens driving unit is drivingly connected to the third lens assembly, and the second lens driving unit drives the third lens assembly to move horizontally and laterally along the optical axis to enable the camera module to achieve continuous zooming.

[0036] According to one embodiment of the present invention, the lens driving device includes a piezoelectric driving shaft and a vibration component, wherein the piezoelectric driving shaft is parallel to the optical axis of the camera module body, and one end of the piezoelectric driving shaft is fixed, and the other end is fixedly connected to the vibration component by an adhesive, so that the vibration component drives the piezoelectric driving shaft to vibrate.

[0037] According to an embodiment of the present invention, the prism driving axis of the prism driving device and the piezoelectric driving axis of the lens driving device are located on the same side of the positive direction of the reference axis X-axis inside the shell, and are parallel to the optical axis of the lens group.

[0038] According to one embodiment of the present invention, it further comprises at least one magnetic sensor, wherein the magnetic sensor is disposed between the lens group and the housing.

[0039] Further objects and advantages of the present invention will be fully apparent from an understanding of the following description and the accompanying drawings.

[0040] These and other objects, features and advantages of the present invention will be more fully understood from the following detailed description and accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 It is an overall schematic diagram of a periscope camera module according to a first preferred embodiment of the present invention.

[0042] Figure 2 It is a schematic diagram of the camera module body of the periscope camera module according to the first preferred embodiment of the present invention.

[0043] Figure 3 It is a schematic diagram of a reflective prism structure of the periscope camera module according to the first preferred embodiment of the present invention.

[0044] Figure 4 It is a schematic structural diagram of a vibrating component of the periscope camera module according to the first preferred embodiment of the present invention.

[0045] Figure 5 It is a schematic diagram of an optional implementation of another driving structure of a reflective prism of the periscope camera module according to the first preferred embodiment of the present invention.

[0046] Figure 6 It is a stereoscopic schematic diagram of the driving structure of the periscope camera module according to the first preferred embodiment of the present invention. DETAILED DESCRIPTION

[0047] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art can think of other obvious variations. The basic principles of the present invention defined in the following description can be applied to other embodiments, variations, improvements, equivalents, and other technical solutions that do not deviate from the spirit and scope of the present invention.

[0048] Those skilled in the art should understand that, in the disclosure of the present invention, the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the above terms should not be understood as limiting the present invention.

[0049] It is to be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the element may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0050] Referring to the accompanying drawings of the present invention Figures 1 to 4 As shown, a periscope camera module according to the first preferred embodiment of the present invention is explained in the following description. The periscope camera module includes a camera module body 10, a reflective prism 20, and a prism driving device 30, wherein the reflective prism 20 is drivably connected to the prism driving device 30, and the reflective prism 20 is driven to move by the prism driving device 30. The camera module body 10 has an optical axis O, and the reflective prism 20 is arranged on the light incident side of the camera module body 10 along the direction of the optical axis O of the camera module body 10. The reflecting prism 20 has a light inlet 201, a light outlet 202 and a light reflecting surface 203, wherein the light outlet 202 of the reflecting prism 20 is directly opposite to the camera module body 10, and light is incident on the light reflecting surface 203 through the light inlet 201 of the reflecting prism 20, and is reflected by the light reflecting surface 203 and then emitted to the camera module body 10 through the light outlet 202.

[0051] It is worth mentioning that in this preferred embodiment of the present invention, the external light is reflected by the reflecting prism 20 to the camera module body 10, and the camera module body 10 forms an image of the light reflected by the reflecting prism 20.

[0052] The prism driving device 30 drives the reflecting prism 20 to move, wherein the reflecting prism 20 is driven by the prism driving device 30 to move in a rotational motion on the light incident side of the camera module 10, thereby changing the direction of the light reflected by the reflecting prism 20, and further changing the imaging effect of the camera module body 10. It is worth mentioning that when the camera module shakes during shooting, the camera module 10 has a poor imaging effect due to the shaking. Therefore, when the camera module body 10 shakes, based on the principle of jitter compensation, the prism driving device 30 drives the reflecting prism 20 to rotate in a specific direction, thereby changing the incident angle of the external light incident on the camera module body 10, so as to compensate for the imaging effect of the camera module body 10 caused by the shaking, and realize the anti-shake effect of the periscope camera module.

[0053] like Figure 3As shown, the periscope camera module further includes a prism seat 40, wherein the reflective prism 20 is disposed on the prism seat 40, and the prism seat 40 is drivingly connected to the prism driving device 30, the prism seat 40 is driven by the prism driving device 30, and then the reflective prism 20 is driven by the prism seat 40 to move synchronously. Preferably, in this preferred embodiment of the present invention, the reflective prism 20 is fixed to the prism seat 40, so that the reflective prism 20 rotates as the prism seat 40 is driven by the prism driving device 30.

[0054] The reflecting prism 20 further has an inclined surface 204, and the prism seat 40 has a supporting surface 401, wherein the inclined surface 204 of the reflecting prism 20 is supported on the supporting surface 401 of the prism seat 40. Preferably, in this preferred embodiment of the present invention, the inclined surface 204 of the reflecting prism 20 is in contact with the supporting surface 401 of the prism seat 40. Two mutually parallel triangular faces adjacent to the hypotenuse of the inclined surface 204 of the reflecting prism 20 are in contact with two side surfaces of the prism seat 40, which has the function of supporting and positioning the reflecting prism 20.

[0055] The periscope camera module further includes a transmission device 50, wherein the transmission device 50 is drivably connected to the prism driving device 30 and the prism seat 40, wherein the transmission device 50 can be driven by the prism driving device 30, and the prism seat 40 is driven by the transmission device 50 in a rotational manner.

[0056] The prism drive device 30 includes a prism drive shaft 31 and a piezoelectric driver 32, wherein the piezoelectric driver 32 and the prism drive shaft 31 are fixedly connected, and the prism drive shaft 31 is driven by the piezoelectric driver 32. Preferably, the prism drive shaft 31 is parallel to the optical axis O direction of the camera module body 10, wherein the prism drive shaft 31 moves linearly along the optical axis O direction under the driving action of the piezoelectric driver 32. More preferably, the prism drive shaft 31 is vertically connected to the transmission device 50, that is, the prism drive shaft 31 is in a vertical state with the transmission device 50. The prism drive shaft 31 moves linearly along the optical axis O direction under the driving action of the piezoelectric driver 32. The transmission device 50 converts the linear motion of the prism drive shaft 31 into a rotational motion around the optical axis O direction. Thereby, the direction of the outgoing light of the reflective prism 20 is changed to achieve the optical anti-shake effect of the periscope camera module.

[0057] In detail, the transmission device 50 further includes a shaft seat 51 and a transmission shaft 52 disposed on the shaft seat 51, wherein the shaft seat 51 is disposed on the prism seat 40, and the shaft seat 51 is located at the corresponding surface of the support surface 401 of the prism seat 40 and the reflective prism 20. The transmission shaft 52 is perpendicular to the direction of the optical axis O of the camera module body 10, and one end of the transmission shaft 52 is located in the shaft hole inside the shaft seat 51, and the other end of the transmission shaft 52 extends outward from the shaft hole of the shaft seat 51 and is vertically connected to the prism drive shaft 31. The prism drive shaft is parallel to the optical axis O of the camera module body 10. In a preferred embodiment of the present invention, there is a connecting piece between the transmission shaft 52 and the prism drive shaft 31 to fix the two together, and the connecting piece is not shown in the figure.

[0058] Preferably, the other end of the prism driving shaft 31 is fixedly connected to the piezoelectric driver 32 via an adhesive.

[0059] The transmission shaft 52 of the transmission device 50 is driven by the prism drive shaft 31 as a guide mechanism, and is converted into a driving force for driving the prism seat 40 to rotate, so as to drive the prism seat 40 to rotate around a direction perpendicular to the optical axis O, change the direction of the light emitted by the reflection prism 20, and achieve an optical image stabilization effect. It is worth mentioning that in this preferred embodiment of the present invention, the prism drive shaft 31 is parallel to the optical axis of the lens group 10. This design structure reduces the width of the housing 13, thereby reducing the overall volume of the module, reasonably utilizing the internal space of the housing, facilitating installation, and facilitating the miniaturization design of the module.

[0060] Assume that the periscope camera module has a reference axis (Y axis) perpendicular to the optical axis O (Z axis) of the camera module body 10, the reference axis (Y axis) is coplanar with the optical axis O, and the plane where the reference axis (Y axis) and the optical axis O are located is perpendicular to the reflective surface, and the camera module also has a reference axis (X axis) perpendicular to the optical axis (Z axis) of the lens group 10, the reference axis (X axis) is coplanar with the optical axis O, and the plane where the reference axis (X axis) and the optical axis O are located is parallel to the reflective surface. It is worth mentioning that in this preferred embodiment of the present invention, the transmission shaft 51 serves as a guide mechanism to convert linear motion into rotational motion, so that the prism seat 40 and the reflective prism 20 obtain a certain tilt angle, thereby causing the reflective prism 20 to rotate around the reference axis (X axis), changing the direction of the light emitted from the reflective prism 20, and achieving the effect of optical image stabilization.

[0061] like Figure 4As shown, in this preferred embodiment of the present invention, the piezoelectric driver 32 of the prism driving device 30 is implemented as a piezoelectric device, wherein the prism driving axis 31 of the prism driving device 30 is parallel to the optical axis O of the camera module body 10. The piezoelectric driver 32 includes a piezoelectric element 321, and the piezoelectric element 321 is a stacked structure, and the piezoelectric element 321 includes a plurality of piezoelectric expansion bodies 3211 and a plurality of internal electrodes 3212, and the internal electrodes 3212 are alternately stacked with a plurality of piezoelectric expansion bodies 3211 to form a plurality of electrodes, and the plurality of piezoelectric expansion bodies 3211 and the plurality of internal electrodes 3212 are stacked on each other, which greatly reduces the cross-sectional area occupied by the piezoelectric element 321, and this stacked structure can also have the same displacement distance under the condition of applying a small electric field.

[0062] It is worth mentioning that the upper and lower surfaces of the piezoelectric expansion body 3211 form an upper electrode 32111 and a lower electrode 32112, and the electrode located on the side of the piezoelectric expansion body 3211 is called a side electrode 3213; when the piezoelectric expansion body 321 is a single piezoelectric expansion body 321, the positive electrode and the negative electrode are connected on the surface of the upper electrode 3211 and the lower electrode 3212 of the piezoelectric expansion body 321, and the side electrode 3213 is connected to an external circuit. When there are multiple piezoelectric expansion bodies 321, the electrode layers of the same polarity are connected through the side electrodes, so that the electrode layers of the positive and negative electrodes can be led out on two sides. It can be understood that the connection method can be in the form of welding, etc., which can ensure its connection strength.

[0063] Preferably, the prism driving shaft 31 and the piezoelectric driver 32 are fixed to each other via an adhesive, and the prism driving shaft 31 is fixed to a middle section of the upper surface of the piezoelectric element 321 .

[0064] Preferably, in this preferred embodiment of the present invention, the reflective prism 20 is a right-angled triangular prism, which is installed on the light-incoming side of the camera module. The prism seat 40 is an integral structural accessory, having a supporting surface opposite to the reflective prism 20, and the reflective prism 20 and the prism seat 40 are bonded together by glue, so that the reflective prism 20 is fixed on the supporting surface of the prism seat 40 to prevent the reflective prism 20 and the prism seat 40 from sliding relative to each other.

[0065] like Figure 1 and Figure 2As shown, the camera module body 10 includes a lens group 11, an image sensor 12 arranged along the optical axis O, and a housing 13 for fixing the lens group 11 and the image sensor 12. The prism seat 40, the lens group 11 and the image sensor 12 are all installed in the housing 13. The housing 13 is a rectangular structure as a whole. The housing has an opening at the position of the reflective prism 20. The ambient light can enter the reflective prism 20 through the light incident surface, and is reflected by the reflective surface to the light exit surface to the lens group 11. The light passing through the lens group 11 can be further transmitted to the image sensor 20. The image sensor 12 is installed on the light exit side of the reflective prism 20. The light exit side of the periscope camera module includes the image sensor 12 that converts the light passing through the lens group 11 into an electrical signal and a circuit board on which the image sensor 12 is installed.

[0066] like Figure 1 and Figure 2 As shown, the camera module body 10 further includes at least one lens driving device 14, wherein the lens driver 14 is disposed in the housing 13, and the lens driver 14 is drivingly connected to the lens group 11, and the lens driver 14 drives the lens group to move in a specific direction to adjust the focal length of the entire system. It is worth mentioning that the lens driver 14 drives the lens group 11 to shake, so as to compensate for the imaging shake caused by the overall shaking of the camera module, thereby realizing the optical image stabilization of the periscope camera module.

[0067] The lens group 11 further includes a first lens group 111, a second lens group 112 and a third lens group 113, wherein the first lens group 111, the second lens group 112 and the third lens group 113 are arranged in sequence from the object side to the image side along the optical axis O. The reflecting prism 20 is located at the object side end of the first lens group 111 of the lens group 10, wherein the light reflected by the reflecting prism 20 passes through the first lens group 111 to the second lens group 113. The second lens group 112 is located at the light exiting side of the first lens group 111, and the third lens group 113 is located at the light exiting side of the second lens group 112.

[0068] The first lens group 111 includes a first lens frame 1111 and at least one first lens unit 1112 fixed by the first lens frame 1111, wherein the first lens unit 1112 is supported by the first lens frame 1111 and fixed to the inner side of the housing 13. The second lens group 112 includes a second lens frame 1121 and at least one second lens unit 1122 fixed by the second lens frame 1121, wherein the second lens group 112 is drivably connected to the lens driving device 14, and the lens driving device 14 drives the second lens group 112 to move horizontally along the optical axis O. In other words, in this preferred embodiment of the present invention, the second lens group 112 is driven by the lens driving device 14 as a zoom lens to adjust the focal length of the entire system.

[0069] The third lens group 113 includes a third lens frame 1131 and at least one third lens unit 1132 fixed by the third lens frame 1131, wherein the third lens group 113 is drivably connected to the lens driving device 14, and the lens driving device 14 drives the second lens group 112 to move horizontally along the optical axis O. In other words, in this preferred embodiment of the present invention, the third lens group 113 serves as a focusing lens and is located at the end of the lens group 10, adjacent to the image sensor 12, so that the camera module can play a role of continuous zoom.

[0070] The housing 13 has a first long side surface and a second long side surface, and the first long side surface is provided with two guide rails at the same height as the lens frame, which can provide the lens group 11 with sliding back and forth. The housing 13 also has a first fixed connection portion and a second fixed connection portion (not shown in the figure) that can clamp the lens frame, respectively clamping the second lens frame 1121 and the lens frame 1131 corresponding to the third lens, and the fixed connection portions are both located on the positive direction side of the reference axis X axis of the corresponding lens frame.

[0071] The fixed connection part is connected to the lens driving device 14 in a transmission manner, that is, one end of the fixed connection part clamps the second lens frame 1121 or the lens frame 1131 corresponding to the third lens, and the other end clamps the lens driving device 14. The fixed connection part plays a transmission role, which facilitates the friction between the lens driving device 14 and the fixed connection part to drive the second lens frame 1121 or the lens frame 1131 corresponding to the third lens to shake, and further enables the lens group 10 to shake. It is worth mentioning that the lens group 10 can achieve continuous zooming by fixing and moving the internal lens.

[0072] The image sensor 12 is located on the light-emitting side of the third lens assembly 113 and is arranged on the short side surface inside the shell 13. The center positions of the lens group 11, the reflecting prism 20, and the image sensor 12 are all located on the optical axis O, thereby transmitting the received light to the image sensor 12.

[0073] The lens driving device 14 further includes a first lens driving unit 14a and a second lens driving unit 14b, wherein the first lens driving unit 14a is drivingly connected to the second lens assembly 112, and the first lens driving unit 14a drives the second lens assembly 112 to move. The second lens driving unit 14b is drivingly connected to the third lens assembly 113, and the second lens driving unit 14b drives the third lens assembly 113 to move.

[0074] Preferably, in this preferred embodiment of the present invention, the lens driving device 14 is implemented as a piezoelectric device. More preferably, in this preferred embodiment of the present invention, the first lens driving unit 14a and the second lens driving unit 14b of the lens driving device 14 have the same structure.

[0075] The lens driving device 14 includes a piezoelectric driving shaft 141 and a vibrating component 142, wherein the piezoelectric driving shaft 141 is parallel to the optical axis O of the camera module body 10, and one end of the piezoelectric driving shaft 141 is fixed by the fixed connection part, and the other end is fixedly connected to the vibrating component 142 by an adhesive, so that the vibrating component 142 drives the piezoelectric driving shaft 141 to vibrate.

[0076] Preferably, in this preferred embodiment of the present invention, the first lens driving unit 14a and the second lens driving unit 14b of the lens driving device 14 are arranged opposite to each other, that is, the vibration component 142 of the first lens driving unit 14a and the vibration component 142 of the second lens driving unit 14b are arranged face to face, which is convenient for internal circuit routing. At the same time, the face-to-face arrangement will also provide more internal space, thereby facilitating compact packaging.

[0077] Preferably, in this preferred embodiment of the present invention, the vibration component 142 has the same structure as the piezoelectric driver 32. Specifically, the vibration component 142 includes a piezoelectric element, and the piezoelectric element is in a stacked structure, and the stacked structure has a plurality of piezoelectric expansion bodies and a plurality of internal electrodes, and the internal electrodes are alternately stacked with a plurality of electrodes formed by a plurality of piezoelectric expansion bodies, and the plurality of piezoelectric expansion bodies and the plurality of internal electrodes are stacked on each other, which greatly reduces the cross-sectional area occupied by the piezoelectric element, and this stacked structure can also have the same displacement distance under the condition of applying a small electric field. The upper and lower surfaces of the piezoelectric telescopic body form upper electrodes and lower electrodes, and the electrodes located on the side of the piezoelectric telescopic body are called side electrodes; when the piezoelectric telescopic body is single, the positive electrode and the negative electrode are connected on the surface of the upper electrode and the lower electrode of the piezoelectric telescopic body, and the side electrodes are connected to the external circuit; when there are multiple piezoelectric telescopic bodies, the electrode layers of the same polarity are connected through the side electrodes, so that the electrode layers of the positive and negative electrodes can be led out on two sides; wherein, the connection method can be welding or the like, which can ensure its connection strength. The piezoelectric drive shaft and the vibration component are fixed by an adhesive, and are located in the middle section of the upper surface of the piezoelectric element.

[0078] In this preferred embodiment of the present invention, the piezoelectric drive shaft 141 of the first lens drive unit 14a and the second lens drive unit 14b is installed on one side of the housing 13 near the second long side, parallel to the optical axis O (Z axis) of the lens group 11, and the piezoelectric drive shaft of the first lens drive unit 14a and the piezoelectric drive shaft of the second lens drive unit 14b are arranged relative to each other. Since the vibration component 142 is located at one end of the piezoelectric drive shaft 141, the vibration component 142 of the first lens drive unit 14a and the vibration component of the second lens drive unit 14b are also arranged relative to each other.

[0079] It is worth mentioning that when a pulse voltage is applied to the lens driving device 14, the piezoelectric expansion body will be deformed, forming an inverse piezoelectric effect, thereby causing the entire vibration component 142 to continuously vibrate up and down. The piezoelectric element using this stacked structure has the advantages of small size, large thrust, and high precision, and the overall driving structure is relatively simple, which is suitable for compact camera modules, and only requires a small capacitor to provide a large driving force.

[0080] The prism seat 50 is disposed on the housing together with the reflective prism 40. Since the prism drive shaft 31 performs linear motion, and the transmission shaft 52 is vertically connected to the prism drive shaft 31, and the transmission shaft 52 serves as a guide mechanism to convert the linear motion into rotational motion, the prism seat 40 and the reflective prism 20 obtain a certain tilt angle. The reflective prism 20 performs rotational motion around the reference axis (X axis), changing the direction of the light emitted from the reflective prism 20, and achieving the effect of optical image stabilization.

[0081] Preferably, in this preferred embodiment of the present invention, the prism drive shaft 31 of the prism drive device 30 and the piezoelectric drive shaft 141 of the lens drive device 14 are located on the same side of the positive direction of the reference axis X axis inside the housing 13, and are parallel to the optical axis O of the lens group 11. This design structure reduces the width dimension of the housing 13, thereby reducing the overall volume of the module, reasonably utilizing the internal space of the housing, facilitating installation, and facilitating the miniaturization design of the module.

[0082] The periscope camera module further includes at least one magnetic sensor 60, wherein the magnetic sensor 60 is arranged between the fixed connection part of the lens group 11 and the shell 13, and the magnetic sensor 60 is used to detect the degree of change of the magnetic field strength in the camera module body 10 of the periscope camera module.

[0083] Therefore, in this preferred embodiment of the present invention, when the second lens group 112 and the third lens group 113 in the lens group 11 move, the lens frame as a support also moves, and the magnetic sensor 60 can detect the distance and direction of the movement of the lens frame. During the detection process, the magnetic sensor 60 can express the degree of change of the magnetic field intensity. Preferably, in this preferred embodiment of the present invention, the magnetic sensor 60 can be, but is not limited to, a magnetoresistive sensor.

[0084] The periscope camera module further includes at least one circuit board 70, wherein the circuit board 70 is electrically connected to the magnetic sensor 60. The circuit board 70 is arranged around the magnetic sensor 60, and one end of the circuit board 70 is electrically connected to the magnetic sensor 60, and the circuit board 70 extends out close to the inner surface of the second long side of the shell, and the other end of the circuit board 70 is electrically connected to the circuit of the vibration component 142 in the lens drive device 14. Preferably, in this preferred embodiment of the present invention, the circuit board 70 is implemented as a flexible circuit board (FPC). It can be understood that the type of the circuit board is merely exemplary and not restrictive.

[0085] More preferably, in this preferred embodiment of the present invention, the circuits of the lens driving device 14 and the prism driving device 30 are connected. In one embodiment, the number of the magnetic sensors 60 and the circuit board 70 are both two, which is the same as the number of the lens driving device 14, and the directions of the circuit boards 70 are opposite to each other. Preferably, the circuit board 70 is arranged between the vibration component 142a of the first lens driving unit 14a and the vibration component 142b of the second lens driving unit 14b.

[0086] Preferably, the circuit board 70 is attached to the surface of the second long side of the shell 13, which can make the internal space of the module more compact, and improve the system integration without affecting the space occupied by other components. Optionally, in other optional embodiments of the present invention, the circuit board 70 is arranged in the bottom area of ​​the shell 13, does not occupy the internal space of the shell 13, and does not need to be attached to the side surface of the shell, which provides better space for other components, further miniaturizes the overall volume and size of the module, and makes the package more compact.

[0087] It is worth mentioning that in this preferred embodiment of the present invention, the circuit routing of the periscope camera module is arranged inside the bottom of the shell or attached to the surface of the second long side of the shell, which effectively improves the internal space problem of the camera module and provides better space for the driving elements, making the module structure more miniaturized and realizing compact packaging of the module structure.

[0088] Referring to the accompanying drawings of the present invention Figure 5 and Figure 6 As shown, another optional implementation of a prism driving device 30A of the periscope camera module according to the above preferred embodiment of the present invention is explained in the following description. The prism driving device 30A includes a piezoelectric motor 31A and a crank slider mechanism 32A, wherein the piezoelectric motor 31A is drivingly connected to the crank slider mechanism 32A, wherein the crank slider mechanism 32A is drivably connected to the prism seat 40, and the piezoelectric motor 31A drives the prism seat 40 and the reflective prism 20 to move through the crank slider mechanism 32A to achieve optical image stabilization of the periscope camera module.

[0089] It is worth mentioning that in this preferred embodiment of the present invention, the piezoelectric motor 31A is arranged on one side of the second long side of the housing 13 to reduce the space occupied by the prism driving device 30A in the width direction of the housing 13. The crank slider mechanism 32A further includes a crank 321A, a slider 322A and a connecting shaft 323A, wherein the slider 322A is drivingly connected to the piezoelectric motor 31A, and the slider 322A is driven by the piezoelectric motor 31A to move linearly along the optical axis O. The slider 322A can be driven by the piezoelectric motor 322A as a follower, and the crank 321A and the slider 322A are connected through the connecting shaft 323A, wherein the other end of the crank 321A is connected to the prism seat 40.

[0090] It is worth mentioning that in this preferred embodiment of the present invention, the connecting shaft 323A is parallel to the reference axis X axis, and the crank 321A is parallel to the plane where the optical axis O (Z axis) of the lens group 11 and the reference axis Y axis are located. The prism driving device 30A further includes a guide element 33A, wherein one end of the guide element 33A is connected to the slider 322A, and the other end is connected to the prism seat 40. When the piezoelectric motor 31A applies a driving force, it will drive the slider 322A to move linearly, and the crank 321A and the connecting shaft 323A will also move accordingly. The connecting shaft 323A can keep the slider 322A and the crank 321A in relative motion. The crank 321A drives the prism seat 40 to form a certain inclination angle around the reference axis (X axis), and the guide element 33A can convert the linear motion into rotational motion, and further make the prism seat 40 and the reflecting prism 20 rotate around the reference axis (X axis).

[0091] Preferably, in this preferred embodiment of the present invention, the guide element 33A is in an "L"-shaped structure.

[0092] Optionally, in other optional embodiments of the present invention, the number of the prism drive devices 30A is two, and the two prism drive devices 30A are symmetrically arranged on one side of the first long side of the housing. The two prism drive devices 30A are symmetrical with the optical axis O (Z axis) of the lens group 11 as the central axis, so that the prism seat 40 and the reflective prism 20 can rotate better, and further make the overall prism structure more stable during the movement.

[0093] It should be understood by those skilled in the art that the embodiments of the present invention described above and shown in the accompanying drawings are only examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functional and structural principles of the present invention have been demonstrated and explained in the embodiments, and the embodiments of the present invention may be deformed or modified in any way without departing from the principles.

Claims

1. A periscope camera module, characterized in that: include: A camera module body, wherein the camera module body includes a shell; a reflecting prism, wherein the camera module body has an optical axis, and the reflecting prism is arranged on the light incident side of the camera module body along the optical axis direction of the camera module body, so that the reflecting prism reflects external light to the camera module body; A prism drive device, wherein the reflective prism is drivably connected to the prism drive device, wherein the prism drive device comprises a prism drive shaft and a piezoelectric driver, wherein the piezoelectric driver and the prism drive shaft are fixedly connected, and the prism drive shaft is parallel to the optical axis direction of the camera module body, wherein the prism drive shaft moves linearly along the optical axis direction under the driving action of the piezoelectric driver to change the direction of the light emitted by the reflective prism and compensate for the optical jitter of the camera module body; as well as At least one lens driving device, wherein the lens driver is drivingly connected to the lens group, and the lens driver drives the lens group to move along a specific direction, wherein the lens driving device includes a piezoelectric driving shaft and a vibration component, wherein the piezoelectric driving shaft is parallel to the optical axis of the camera module body, and one end of the piezoelectric driving shaft is fixed, wherein the prism driving shaft of the prism driving device and the piezoelectric driving shaft of the lens driving device are located on the same side of the positive direction of the reference axis X-axis inside the shell, and are both parallel to the optical axis of the lens group.

2. The periscope camera module according to claim 1 further comprises a prism seat, wherein the reflective prism is arranged on the prism seat, and the prism seat is drivingly connected to the prism driving device, the prism driving device drives the prism seat, and then the prism seat drives the reflective prism to move synchronously.

3. The periscope camera module according to claim 2, wherein the reflective prism further has a bevel, and the prism seat has a supporting surface, wherein the bevel of the reflective prism is supported on the supporting surface of the prism seat, and the bevel of the reflective prism is in contact with the supporting surface of the prism seat.

4. The periscope camera module according to claim 3 further comprises a transmission device, wherein the transmission device is drivably connected to the prism driving device and the prism seat, wherein the transmission device can be driven by the prism driving device, and the prism seat is driven in a rotational manner by the transmission device.

5. The periscope camera module according to claim 4, wherein the prism drive shaft is vertically connected to the transmission device, the prism drive shaft is vertical to the transmission device, and the transmission device converts the linear motion of the prism drive shaft into a rotational motion around the reference axis X-axis direction to change the direction of the output light of the reflective prism.

6. The periscope camera module according to claim 4, wherein the transmission device further comprises an axle seat and a transmission shaft arranged on the axle seat, wherein the axle seat is arranged on the prism seat, and the axle seat is located at the supporting surface of the prism seat and the corresponding surface of the reflective prism.

7. The periscope camera module according to claim 6, wherein the transmission shaft of the transmission device is driven by the prism drive shaft as a guide mechanism, and is converted into a driving force for driving the prism seat to rotate, so as to drive the prism seat to rotate around the X-axis direction perpendicular to the reference axis.

8. The periscope camera module according to claim 4, wherein the piezoelectric driver comprises a piezoelectric element, the piezoelectric element has a stacked structure, and the piezoelectric element comprises a plurality of piezoelectric expanders and a plurality of internal electrodes, the internal electrodes are a plurality of electrodes formed by alternately stacking a plurality of piezoelectric expanders, and the plurality of piezoelectric expanders and the plurality of internal electrodes are stacked on each other.

9. The periscope camera module according to claim 3, wherein the prism driving device comprises a piezoelectric motor and a crank slider mechanism, wherein the piezoelectric motor is transmission-connected to the crank slider mechanism, wherein the crank slider mechanism is transmission-connected to the prism seat, and the piezoelectric motor drives the prism seat and the reflective prism to move through the crank slider mechanism.

10. The periscope camera module according to claim 9, wherein the crank slider mechanism further comprises a crank, a slider and a connecting shaft, wherein the slider is drivingly connected to the piezoelectric motor, and the piezoelectric motor drives the slider to move linearly along the optical axis.

11. The periscope camera module according to claim 10, wherein the connecting axis is parallel to the reference axis X axis, and the crank is parallel to the plane where the optical axis of the lens group and the reference axis Y axis are located.

12. The periscope camera module according to claim 10, wherein the prism driving device further comprises a guide element, wherein one end of the guide element is connected to the slider, and the other end is connected to the prism seat, and when the piezoelectric motor applies a driving force, it will drive the slider to move linearly, and the crank and the connecting shaft will also move accordingly, and the connecting shaft can maintain relative motion between the slider and the crank.

13. A periscope camera module according to claim 4 or 9, wherein the camera module body comprises a lens group, an image sensor arranged along the optical axis direction, and a shell for fixing the lens group and the image sensor.

14. The periscope camera module according to claim 13, wherein the circuit wiring of the camera module is arranged on the inner side of the bottom of the shell; or the circuit of the camera module is attached to a side surface inside the shell.

15. The periscope camera module according to claim 13, wherein the lens group further comprises a first lens group, a second lens group and a third lens group, wherein the reflective prism is located at an object side end of the first lens group of the lens group, wherein the light reflected by the reflective prism passes through the first lens group to the second lens group, the second lens group is located at the light emitting side of the first lens group, and the third lens group is located at the light emitting side of the second lens group.

16. The periscope camera module according to claim 15, wherein the lens driving device further comprises a first lens driving unit and a second lens driving unit, wherein the first lens driving unit is drivingly connected to the second lens assembly, and the first lens driving unit drives the second lens assembly to move horizontally and laterally along the optical axis to adjust the focal length of the entire system; the second lens driving unit is drivingly connected to the third lens assembly, and the second lens driving unit drives the third lens assembly to move horizontally and laterally along the optical axis to enable the camera module to achieve continuous zooming.

17. The periscope camera module according to claim 15, wherein the piezoelectric driving axis of the first lens driving unit and the piezoelectric driving axis of the second lens driving unit of the lens driving device are arranged oppositely and face to face.

18. The periscope camera module according to claim 17 further comprises at least one magnetic sensor, wherein the magnetic sensor is arranged between the lens group and the shell.

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