Camera module and mobile terminal having the same

Abstract

The present invention discloses a camera module and a mobile terminal having the same. The camera module comprises: a first optical path conversion component, a lens, a second optical path conversion component, an image sensing element and at least one circuit board. The first optical path conversion component comprises a first prism and a first driving member, and the first driving member is connected to the first prism to drive the first prism to rotate; the lens comprises a plurality of lenses, and the lens is arranged toward the exit surface of the first prism; the second optical path conversion component comprises at least one prism, a second driving member, and a third driving member, and the prism to which the initial incident surface belongs is connected to the second driving member to be driven to rotate; the image sensing element is arranged relative to the final exit surface of at least one prism, and in the directions relative to each other, at least one prism is connected to the third driving member to be driven to move. Thus, automatic focusing and optical image stabilization are achieved while keeping the lens position fixed, and driving a prism with relatively small mass can save the power consumption of the motor.

Description

Technical Field

[0001] The present invention relates to the field of optical modules, and in particular to a camera module and a mobile terminal having the same. Background Art

[0002] Currently, in the miniaturized telephoto camera module (such as the telephoto periscope used in mobile phones), it includes a prism and a lens. Focusing is achieved by moving the lens back and forth, and anti-shake is achieved by coordinating the movement of the lens and the rotation of the prism. As the lens becomes longer and longer, heavier and larger in size, the design and production of the telephoto module encounters problems such as large size, high power consumption, and difficulty in designing due to excessive motor load. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one object of the present invention is to provide a camera module with compact structure and low power consumption.

[0004] According to the first embodiment of the present invention, the camera module includes: a first optical path conversion component, a lens, a second optical path conversion component, an image sensing element and at least one circuit board, the first optical path conversion component includes a first prism and a first driving member, the first driving member is connected to the first prism to drive the first prism to rotate around a first direction; the lens includes a plurality of lenses, and the lens is arranged toward the exit surface of the first prism; the second optical path conversion component includes at least one prism, a second driving member, and a third driving member, the initial incident surface of the at least one prism, the lens, and the first prism are arranged in sequence along a third direction, and the prism to which the initial incident surface belongs is connected to the second driving member to be driven to rotate around the second direction; the image sensing element and the final exit surface of the at least one prism are arranged relative to each other in the third direction or the first direction, and in the directions relative to each other, the at least one prism is connected to the third driving member to be driven to move, and any two of the first direction, the second direction, and the third direction are perpendicular to each other; the first driving member, the second driving member, and the third driving member are electrically connected to the at least one circuit board.

[0005] The camera module of the embodiment of the present invention sets the lens in a fixed manner, and on this basis, adds a second optical path conversion component, and realizes automatic focus by at least moving the prism to which the final exit surface of the second optical path conversion component belongs to change the focal length in the optical axis direction; by rotating the first prism around the first direction, jitter compensation in the second direction is realized, and by rotating the prism to which the initial incident surface belongs around the second direction, jitter compensation in the first direction is realized, thereby realizing optical image stabilization. In summary, the camera module realizes the functions of automatic focus and optical image stabilization while keeping the lens position fixed, and driving the prism with relatively small mass can save the power consumption of the motor, which is a new periscope camera module.

[0006] In some embodiments, the second optical path conversion component includes: a second prism and a third prism, the second prism is configured to rotate around a second direction, the incident surface of the second prism is formed as an initial incident surface; the exit surface of the third prism is formed as a final exit surface, the third prism and the second prism are arranged opposite to each other in the first direction, and the light emitted by the third prism is opposite to the direction of the light incident on the second prism, the third prism and the second prism are configured to move synchronously along a third direction, and the image sensing element and the third prism are arranged opposite to each other in the third direction.

[0007] Therefore, the design of the two prisms allows the motor to move the prisms twice the distance when focusing, and the back-focus optical path length changes by two times, which can shorten the motor's moving stroke by half and achieve faster focusing. In addition, the light emitted by the third prism is in the opposite direction to the light incident on the second prism, reducing the length of the camera module along the optical axis, making the module more compact and miniaturized.

[0008] In some embodiments, the second optical path conversion assembly further includes a second housing, a mounting seat disposed in the second housing, and a transmission mechanism, the second prism is rotatably connected to the mounting seat, the third prism is fixedly disposed on the mounting seat, and the transmission mechanism is connected between the mounting seat and the third driving member to drive the mounting seat to drive the second prism and the third prism to move along the third direction. Thus, the second prism and the third prism are integrated on the same mounting seat to achieve synchronous driving of the second prism and the third prism to move in the third direction, and at the same time, the second prism can be independently adjusted in rotation.

[0009] In some embodiments, the transmission mechanism includes a screw and a screw sleeve, the screw is connected to the third driving member fixed in the second housing, the screw sleeve is integrally formed on the mounting seat, and the screw and the screw sleeve are driven by threads. In this way, the transmission mechanism composed of the screw and the screw sleeve is used to realize the movement drive of the mounting seat, the second prism, and the third prism as a whole along the third direction, the transmission is more stable, the displacement control accuracy is higher, and the screw sleeve is directly formed by tapping the mounting seat, which is more convenient for processing and production and simplifies the assembly process.

[0010] In some embodiments, the second optical path conversion assembly further includes: a guide rod, the guide rod is fixed in the second housing, the mounting seat has a sliding hole that slides with the guide rod, and the screw rod and the guide rod are respectively arranged on two opposite sides of the mounting seat in the first direction. Thus, the guide rod slides with the sliding hole of the mounting seat to provide guidance for the movement of the mounting seat along the third direction, so that the two sides of the mounting seat with a larger size in the first direction can move synchronously and more smoothly, avoiding the uneven force on the mounting seat and the skew caused by the third driving member being biased to one side of the mounting seat.

[0011] In some embodiments, a side of the mounting seat facing the lens is provided with an inverted trapezoidal mounting groove, and the second prism and the third prism extend into the mounting groove and are respectively mounted on two side walls of the mounting groove. Thus, the two prisms extend into the mounting groove of the mounting seat, making the installation of the second prism and the third prism more stable, and making the structure of the entire second optical path conversion assembly more compact.

[0012] In some embodiments, it also includes a first displacement sensing element, a second displacement sensing element, and a third displacement sensing element. The number of the circuit boards is three and they are respectively the first circuit board, the second circuit board, and the third circuit board; the first circuit board includes a first driving integrated circuit, and the first driving element and the first displacement sensing element are electrically connected to the first driving integrated circuit to control the first driving element according to the displacement information emitted by the first displacement sensing element; the second circuit board includes a second driving integrated circuit and a third driving integrated circuit, and the second driving element and the second displacement sensing element are electrically connected to the second driving integrated circuit to control the second driving element according to the displacement information emitted by the second displacement sensing element, and the third driving element and the third displacement sensing element are electrically connected to the third driving integrated circuit to control the third driving element according to the displacement information emitted by the third displacement sensing element.

[0013] Therefore, the driver integrated circuit energizes the corresponding driving component to control the rotation or movement of the corresponding prism. The corresponding displacement sensing element senses and confirms the position change of the prism and feeds back to the driver integrated circuit. The driver integrated circuit adjusts the current output according to the received position change, thereby controlling the overall position accuracy of the prism. The above closed-loop control has higher adjustment accuracy.

[0014] In some embodiments, the second driving member includes an induction coil and a magnet, the induction coil is disposed on the mounting seat, the magnet is embedded on the side of the prism facing the induction coil, a portion of the second circuit board passes through the mounting seat to connect with the induction coil, and the second displacement sensing element is connected to the second circuit board and at least partially extends out of the hollow space of the induction coil. Thus, after the induction coil is energized, an electromagnetic force is generated to act on the magnet, so that the magnet drives the second prism to rotate around the second direction, and the arrangement positions of the second circuit board, the second driving member, and the second displacement sensing element are more reasonable.

[0015] In some embodiments, the third driving member is a micro-stepping motor, and the third driving member and the third displacement sensing element are integrated on the second circuit board, and the second circuit board is opposite to a part of the second prism and the third prism below the mounting seat. Thus, a micro-stepping motor is used to drive the screw to rotate, so that the screw sleeve moves along the screw and then drives the mounting seat and the final exit surface to move closer to or away from the image sensing element. The second circuit board is arranged at the above position to facilitate the electrical connection of the second driving member, the third driving member, the second displacement sensing component, and the third displacement sensing component.

[0016] In some embodiments, the first optical path conversion assembly includes a first housing, the first prism is connected to the first housing via a first rotating shaft, and the first circuit board extends out of the first housing; the lens includes a lens barrel, and the lens is arranged in the lens barrel; the first housing and the second housing of the second optical path conversion assembly are respectively connected to the two ends of the lens barrel, and a part of the second circuit board, the second driver integrated circuit, the third driver integrated circuit, and the third circuit board extend out of the second housing. In this way, the three circuit boards are at least partially external, which makes it more convenient to electrically connect the module on the mobile terminal.

[0017] In some embodiments, the first displacement sensing element, the second displacement sensing element, and the third displacement sensing element are any one of a Hall element, a giant magnetometer, and a tunnel magnetoresistive sensor. Therefore, the displacement sensing element is compact in structure and sensitive in sensing.

[0018] In some embodiments, the first driving member, the second driving member, and the third driving member are selected from any one of a voice coil motor, a stepping motor, and a piezoelectric motor. Thus, using the above motors to drive the prism to rotate or move is more convenient to arrange and makes the structure of the camera module more compact.

[0019] In some embodiments, in the third direction, the image sensing element is embedded in the lens barrel of the lens or the second housing of the second optical path conversion assembly. Thus, the embedded design is adopted to further shorten the length of the entire camera module in the optical axis direction.

[0020] A mobile terminal according to an embodiment of the second aspect of the present invention includes the camera module of the above embodiment.

[0021] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0023] Figure 1 4 is a schematic diagram of the principle of a camera module according to an embodiment of the present invention.

[0024] Figure 2 is a schematic cross-sectional view of a camera module according to an embodiment of the present invention.

[0025] Reference numerals:

[0026] Camera module 100,

[0027] A first optical path conversion component 110, a first prism 111, a first housing 112, a first rotating shaft 113,

[0028] Lens 120, lens 121, lens barrel 122,

[0029] The second optical path conversion component 130, the second prism 131, the third prism 132, the initial incident surface a, the final exit surface b, the second driving member 133, the induction coil 1331, the magnet 1332, the third driving member 134, the second housing 135, the mounting seat 136, the mounting groove 1361, the transmission mechanism 137, the screw rod 1371, the screw sleeve 1372, the guide rod 138, the second rotating shaft 139, the image sensing element 140,

[0030] A first circuit board 150a, a second circuit board 150b, a third circuit board 150c, a first driver integrated circuit 151a, a second driver integrated circuit 151b, a third driver integrated circuit 151c,

[0031] The second displacement sensing element 160b, the third displacement sensing element 160c, the third magnet 170,

[0032] The first direction is X, the second direction is Y, and the third direction is Z. DETAILED DESCRIPTION

[0033] Embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. Embodiments of the present invention are described in detail below.

[0034] Reference below Figure 1 to Figure 2 A camera module 100 according to an embodiment of the present invention is described.

[0035] The camera module 100 according to the first embodiment of the present invention includes: a first optical path conversion component 110 , a lens 120 , a second optical path conversion component 130 and an image sensing element 140 .

[0036] The first optical path conversion assembly 110 includes a first prism 111 and a first driving member (not shown in the figure), and the first driving member is connected to the first prism 111 to drive the first prism 111 to rotate around a first direction X. The first direction X may be the X-axis direction shown in the figure, and rotating around the first direction X means that the rotation axis 113 of the first prism 111 is arranged along the first direction X.

[0037] The first prism 111 may include a prism seat and a triangular prism. The three surfaces of the triangular prism are an incident surface, an exit surface, and a reflection surface. The incident surface and the exit surface are perpendicular to each other. The reflection surface is formed as an inclined surface having an angle with the incident surface and the exit surface. The inclined surface of the triangular prism is mounted on the prism seat. A pivotally connected structure may also be provided on the prism seat so that the optical performance of the first prism 111 is not affected by rotation.

[0038] The lens 120 includes a plurality of lenses 121, and the lens 120 is disposed on the exit surface of the first prism 111. The plurality of lenses 121 are disposed sequentially and distributed sequentially along the optical axis direction, and the lens 120 of the first optical path conversion assembly 110 is disposed opposite to the exit surface of the first prism 111, so that the light reflected from the first prism 111 enters the lens 120.

[0039] The second optical path conversion assembly 130 includes at least one prism, a second driving member 133, and a third driving member 134. The initial incident surface a of the at least one prism, the lens 120, and the first prism 111 are sequentially arranged along the third direction Z. The prism to which the initial incident surface a belongs is connected to the second driving member 133 to be driven to rotate around the second direction Y. The image sensing element 140 and the final emission surface b of the at least one prism are arranged opposite to each other in the third direction Z or the first direction X, and any two of the first direction X, the second direction Y, and the third direction Z are perpendicular to each other.

[0040] It should be noted that the initial second optical path conversion component 130 may include one prism or multiple prisms, and the definitions of "at least one initial incident surface a of a prism" and "at least one final exit surface b of a prism" are as follows:

[0041] 1) When only one prism is provided, the incident surface of the prism is “the initial incident surface a of at least one prism”, and the exit surface of the prism is “the final exit surface b of at least one prism”.

[0042] 2) When there are multiple prisms, the change in the optical path is not limited to 90 degrees. For example, a 180-degree turn of the light can also be achieved. In the direction of light entering and exiting, one of the multiple prisms is used to incident light emitted from the lens 120, and the incident surface of the prism is "the initial incident surface a of at least one prism". Another prism among the multiple prisms is used to emit light to the image sensing element 140, and the exit surface of the prism is "the final exit surface b of at least one prism".

[0043] From this, it can be seen that "the initial incident surface a of at least one prism" and "the final exit surface b of at least one prism" both refer to one surface of one of the prisms, rather than the incident surfaces of multiple prisms being called the initial incident surfaces a and the exit surfaces of multiple prisms being called the final exit surfaces b.

[0044] The light passes through the first prism 111, the multiple lenses 121, and the prism of the second optical path conversion component 130 in sequence, and is finally projected onto the image sensing element 140. The image sensing element 140 converts the optical signal into an electrical signal and sends it to the controller of the mobile terminal, which is finally processed and imaged.

[0045] The image sensing element 140 and the final emission surface b of at least one prism are arranged opposite to each other in the third direction Z or the first direction X, and in the directions opposite to each other, at least one prism is connected to the third driving member 134 to be driven to move.

[0046] That is to say, in some embodiments, the second optical path conversion component 130 includes only one prism, in which case the final output surface b of the prism is arranged opposite to the image sensor in the first direction X, and the prism is arranged to be able to rotate around the second direction Y and to be able to move closer to or away from the image sensor in the first direction X.

[0047] In other embodiments, the second optical path conversion component 130 includes multiple prisms. In this case, the first prism in the direction of optical path propagation is configured to be able to rotate around the second direction Y, and the exit surface of the last prism is the final exit surface b. The last prism is arranged relative to the image sensor in the third direction Z. Without affecting the propagation of light, only the last prism can be arranged to be movable in the third direction Z, or multiple prisms can be arranged as a whole to be movable synchronously along the third direction Z.

[0048] Compared with the existing design, the existing focus is achieved by moving the lens 120 forward and backward, and the anti-shake is achieved by moving the lens 120 left and right and cooperating with the rotation of the prism. The camera module 100 of the embodiment of the present invention sets the lens 120 to be fixed, and on this basis, adds a second optical path conversion component 130, and at least moves the prism to which the final exit surface b of the second optical path conversion component 130 belongs to change the focal length in the optical axis direction to achieve automatic focus; rotates the first prism 111 around the first direction X to achieve jitter compensation in the second direction Y, and rotates the prism to which the initial incident surface a belongs around the second direction Y to achieve jitter compensation in the first direction X, thereby achieving optical anti-shake.

[0049] In summary, while keeping the position of the lens 120 fixed, the camera module 100 can realize the functions of autofocus and optical image stabilization, and driving the prism with relatively small mass can save the power consumption of the motor. This is a new periscope camera module 100.

[0050] In a specific embodiment, see Figure 2 As shown, the second optical path conversion assembly 130 includes two prisms. For example, the second optical path conversion assembly 130 includes a second prism 131 and a third prism 132. The second prism 131 is configured to rotate around a second direction Y. The second prism 131, the lens 120, and the first prism 111 are sequentially arranged along the third direction Z. The first direction X is Figure 1 The X-axis direction is shown, and the second direction Y is Figure 1 The Y-axis direction shown in the figure, the third direction Z is Figure 1 In the Z-axis direction shown in , the first direction X, the second direction Y, and the third direction Z are directions that are orthogonal to each other.

[0051] The structure of the second prism 131 is similar to that of the first prism 111 and may also include a lens seat and a prism. The pivotally connected structure may also be arranged on the prism seat. The exit surface of the first prism 111 is arranged opposite to one end of the lens 120, and the incident surface of the second prism 131 is arranged opposite to the other end of the lens 120.

[0052] The incident surface of the second prism 131 is formed as an initial incident surface a, and the exit surface of the third prism 132 is formed as a final exit surface b. The third prism 132 is arranged opposite to the second prism 131 in the first direction X, and the light emitted by the third prism 132 is opposite to the light incident on the second prism 131. The third prism 132 and the second prism 131 are configured to be movable along the third direction Z.

[0053] That is, the incident surface of the third prism 132 and the exit surface of the second prism 131 are arranged opposite to each other in the first direction X to change the optical path, and the light emitted from the third prism 132 is offset in the first direction X relative to the light incident from the second prism 131, so that the light emitted from the third prism 132 is opposite to the light incident from the second prism 131. In this way, the arrangement length along the third direction Z is reduced while ensuring the focus.

[0054] The image sensing element 140 and the third prism 132 are disposed opposite to each other in the third direction Z. The third prism 132 and the second prism 131 can be driven together to move along the optical axis direction (the third direction Z) to change the focal length of the camera assembly.

[0055] Therefore, the design of the two prisms allows the motor to move the prisms twice the distance when focusing, and the back-focus optical path length changes by two times, which can shorten the motor's moving stroke by half and achieve faster focusing. In addition, the light emitted by the third prism 132 is in the opposite direction to the light incident on the second prism 131, thereby reducing the length of the camera module 100 along the optical axis and making the module more compact and miniaturized.

[0056] The basic working principle of the above embodiment is briefly described as follows:

[0057] 1) External light is vertically reflected by the first prism 111 to the lens 120 (Lens), then transmitted to the second prism 131 after passing through the lens 120, reflected by the second prism 131 to the third prism 132, and then transmitted to the image sensor through the third prism 132 for imaging;

[0058] 2) The second prism 131 and the third prism 132 can be used as a combination, which is an auto-focus prism combination. This combination moves along the optical axis to achieve an auto-focus function, and when this prism group moves 1 times the distance, the focusing stroke moves 2 times.

[0059] 3) The first prism 111 and the second prism 131 can be used as another combination, which is an optical anti-shake prism combination. The first prism 111 rotates around the X-axis to achieve jitter compensation in the Y-axis direction; the second prism 131 rotates around the Y-axis to achieve jitter compensation in the X-axis direction.

[0060] The motor types selected by each driving member can be the same or different. The first driving member, the second driving member 133, and the third driving member 134 can be selected from any one of: a voice coil motor, a stepping motor, and a piezoelectric motor. Therefore, using the above motors to drive the prism to rotate or move is more convenient to arrange and makes the structure of the camera module 100 more compact.

[0061] In some embodiments, the second optical path conversion assembly 130 also includes a second shell 135, a mounting base 136 disposed in the second shell 135, and a transmission mechanism 137. The second prism 131 is rotatably connected to the mounting base 136, and the third prism 132 is fixed to the mounting base 136. The transmission mechanism 137 is connected between the mounting base 136 and the third driving member 134 to drive the mounting base 136 to drive the second prism 131 and the third prism 132 to move along the third direction Z together.

[0062] Therefore, the second prism 131 and the third prism 132 are integrated on the same mounting base 136 to achieve synchronous driving of the second prism 131 and the third prism 132 to move in the third direction Z, and at the same time, the rotation of the second prism 131 can be independently adjusted.

[0063] exist Figure 2 In the specific embodiment shown, the transmission mechanism 137 includes a screw rod 1371 and a screw sleeve 1372. The screw rod 1371 is connected to the third driving member 134 fixed in the second housing 135. The screw sleeve 1372 is formed integrally with the mounting seat 136. The screw rod 1371 and the screw sleeve 1372 are driven by threads. In this way, the transmission mechanism 137 composed of the screw rod 1371 and the screw sleeve 1372 is used to realize the movement drive of the mounting seat 136, the second prism 131, and the third prism 132 along the third direction Z as a whole. The transmission is more stable and the displacement control accuracy is higher. Moreover, the screw sleeve 1372 is directly formed by tapping the mounting seat 136, which is more convenient for processing and production and simplifies the assembly process.

[0064] Optionally, the second optical path conversion assembly 130 further includes: a guide rod 138, the guide rod 138 is fixed in the second housing 135, the mounting seat 136 has a sliding hole that slidably cooperates with the guide rod 138, and the screw rod 1371 and the guide rod 138 are respectively arranged on two opposite sides of the mounting seat 136 in the first direction X. Thus, the guide rod 138 and the sliding hole of the mounting seat 136 are slidably cooperated to provide guidance for the movement of the mounting seat 136 along the third direction Z, so that the two sides of the mounting seat 136 with a larger size in the first direction X can move synchronously and more smoothly, thereby avoiding the phenomenon that the mounting seat 136 is unevenly stressed and skewed due to the third driving member 134 being biased to one side of the mounting seat 136.

[0065] See also Figure 2As shown, further, a mounting groove 1361 with an inverted trapezoid is provided on one side of the mounting seat 136 facing the lens 120, and the second prism 131 and the third prism 132 extend into the mounting groove 1361 and are respectively mounted on two side walls of the mounting groove 1361. In other words, the mounting groove 1361 includes a bottom wall and two inclined side surfaces connected to both ends of the bottom wall, the two inclined side surfaces are inclined in opposite directions, one of the inclined side surfaces is opposite to the lens 120 in the third direction Z, the second prism 131 is pivotally connected to one of the inclined side surfaces in a manner that the reflecting surface faces the inclined side surface, and the reflecting surface of the third prism 132 is fixedly arranged on the other inclined side surface.

[0066] Thus, the two prisms extend into the mounting groove 1361 of the mounting seat 136, so that the second prism 131 and the third prism 132 are mounted more stably and the structure of the entire second optical path conversion assembly 130 is more compact.

[0067] In some embodiments, the second driving member 133 includes an induction coil 1331 and a magnet 1332. The induction coil 1331 is disposed on the mounting seat 136 of the second optical path conversion assembly 130. The magnet 1332 is embedded on the side of the prism facing the induction coil 1331. A portion of the second circuit board 150b passes through the mounting seat 136 to be connected to the induction coil 1331. The second displacement sensing element 160b is connected to the second circuit board 150b and at least partially extends out of the hollow space of the induction coil 1331. Thus, after the induction coil 1331 is energized, an electromagnetic force is generated to act on the magnet 1332, so that the magnet 1332 drives the second prism 131 to rotate around the second direction Y. The arrangement positions of the second circuit board 150b, the second driving member 133, and the second displacement sensing element 160b are also more reasonable.

[0068] The camera module 100 further includes a first displacement sensing element, a second displacement sensing element 160b, and a third displacement sensing element 160c. The number of the circuit boards is three, namely, a first circuit board 150a, a second circuit board 150b, and a third circuit board 150c. The first circuit board 150a includes a first driving integrated circuit 151a, and the first driving element and the first displacement sensing element are both electrically connected to the first driving integrated circuit 151a to control the first driving element according to the displacement information emitted by the first displacement sensing element. The second circuit board 150b includes a second driving integrated circuit 151b and a third driving integrated circuit 151c, and the second driving element 133 and the second displacement sensing element 160b are both electrically connected to the second driving integrated circuit 151b to control the second driving element 133 according to the displacement information emitted by the second displacement sensing element 160b, and the third driving element 134 and the third displacement sensing element 160c are both electrically connected to the third driving integrated circuit 151c to control the third driving element 134 according to the displacement information emitted by the third displacement sensing element 160c.

[0069] Therefore, the driver integrated circuit energizes the corresponding driving component to control the rotation or movement of the corresponding prism. The corresponding displacement sensing element senses and confirms the position change of the prism and feeds back to the driver integrated circuit. The driver integrated circuit adjusts the current output according to the received position change, thereby controlling the overall position accuracy of the prism. The above closed-loop control has higher adjustment accuracy.

[0070] exist Figure 2 In the specific example shown, the third driving member 134 is a micro-stepping motor, and the third driving member 134 and the third displacement sensing element 160c are integrated on the second circuit board 150b. The second circuit board 150b is located below the mounting seat 136 of the second optical path conversion component 130 and is opposite to a part of the second prism 131 and the third prism 132. Thus, the micro-stepping motor is used to drive the screw rod 1371 to rotate, so that the screw sleeve 1372 moves along the screw rod 1371 and then drives the mounting seat 136 and the final exit surface b to move closer to or away from the image sensing element 140. The second circuit board 150b is arranged at the above position to facilitate the electrical connection of the second driving member 133, the third driving member 134, the second displacement sensing element 160b, and the third displacement sensing element 160c.

[0071] In some embodiments, the first optical path conversion assembly 110 includes a first housing 112, the first prism 111 is connected to the first housing 112 via a first rotating shaft 113, and the first circuit board 150a extends out of the first housing 112; the lens 120 includes a lens barrel 122, and the lens 121 is disposed in the lens barrel 122; the first housing 112 and the second housing 135 of the second optical path conversion assembly 130 are respectively connected to both ends of the lens barrel 122, and a portion of the second circuit board 150b, the second driver integrated circuit 151b, the third driver integrated circuit 151c, and the third circuit board 150c extend out of the second housing 135. In this way, the three circuit boards are at least partially external, which makes it more convenient to electrically connect the module on the mobile terminal.

[0072] The lens 120 and the second optical path conversion assembly 130 may be assembled together first and adjusted, and then the assembled first optical path conversion assembly 110 may be installed on the lens 120 .

[0073] In other embodiments, the first displacement sensing element, the second displacement sensing element 160b, and the third displacement sensing element 160c may be any one of a Hall element, a giant magnetometer, and a tunnel magnetoresistive sensor (TMR). Therefore, the displacement sensing element is compact in structure and sensitive in sensing.

[0074] exist Figure 2In the specific example shown, in the third direction Z, the image sensing element 140 is embedded in the lens barrel 122 of the lens 120 or the second housing 135 of the second optical path conversion component 130. Thus, the embedded design is adopted to further shorten the length of the entire camera module 100 in the optical axis direction.

[0075] The following is a brief description Figure 2 The structure and working process of the camera module 100 of the specific embodiment shown.

[0076] 1) The coil 1331 of the second driving member 133 is installed opposite to the magnet 1332. The second driving integrated circuit 151b (driving integrated circuit is also called Driver IC) generates electromagnetic force to act on the magnet 1332 after the coil is energized. The second prism 131 rotates around the second rotating shaft 139. The second displacement sensing element 160b senses the magnetic field change of the upper magnet 1332 (it can also be other sensing elements, such as tunnel magnetoresistance sensor, giant magnet, etc.), and then confirms the position change of the second prism 131, and feeds back to the second driving integrated circuit 151b. According to the position change, the second driving integrated circuit 151b adjusts the current output to control the position accuracy of the second prism 131. Therefore, when optical image stabilization is required, the second prism 131 is controlled to rotate to a suitable angle for jitter compensation.

[0077] 2) After the third driving integrated circuit 151c is energized to the third driving member 134 (for example, a micro-stepping motor), a torque is generated to drive the screw 1371 to rotate, and the screw sleeve 1372 drives the mounting seat 136, the second prism 131, and the third prism 132 to move as a whole toward or away from the image sensing element 140. The third displacement sensing element 160c senses the magnetic field change of the third magnet 170 embedded in the bottom surface of the mounting seat 136 (it can also be other sensing elements, such as a tunnel magnetoresistive sensor, a giant magnet, etc.), and then confirms the position change of the second prism 131 and the third prism 132, and feeds back to the third driving integrated circuit 151c. According to the position change, the third driving integrated circuit 151c adjusts the current output to control the position of the second prism 131 and the third prism 132 when the focal length needs to be adjusted or automatic focusing is required.

[0078] 3) The coil 1331 of the second driving member 133, the second displacement sensing element 160b, the third displacement sensing element 160c, the second driving integrated circuit 151b, and the third driving integrated circuit 151c are all connected to the second circuit board 150b, and the second circuit board 150b is finally connected to the host control terminal.

[0079] 4) The rotation of the first prism 111 and the rotation of the second prism 131 adopt the same or similar principle. After the first driving integrated circuit 151a energizes the coil of the first driving member (not shown in the figure), an electromagnetic force is generated to act on the first magnet (not shown in the figure) fixed on the first prism 111. The first prism 111 rotates around the axis of rotation, and the first displacement sensing element inside it senses the magnetic field change of the upper magnet (it can also be other sensing elements, such as tunnel magnetoresistance sensor, giant magnet, etc.), and then confirms the position change of the first prism 111 (which can be angular displacement or linear displacement), and feeds back to the first driving integrated circuit 151a. According to the position change, the first driving integrated circuit 151a adjusts the current output to control the overall position accuracy of the first prism 111. The coil of the first driving member, the first displacement sensing element and the first driving integrated circuit 151a are all connected to the first circuit board 150a circuit, and the first circuit board 150a is finally connected to the host control terminal.

[0080] 5) The image sensing element 140 is connected to the third circuit board 150c, and the third circuit board 150c is finally connected to the host control terminal.

[0081] For mobile terminals or other electronic products, the host control end refers to the controller of the device itself.

[0082] According to the mobile terminal of the second aspect of the present invention, the camera module 100 of the above embodiment is included. Therefore, especially for the telephoto periscope camera module 100, the autofocus and optical image stabilization functions of the camera module 100 are realized by using a prism combination, and the telephoto autofocus and optical image stabilization functions can be realized while keeping the position of the lens 120 unchanged. In this way, the size of the module can be effectively reduced, which is more conducive to the arrangement on the mobile terminal, and is conducive to miniaturization and lightweight.

[0083] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0084] In the description of the present invention, "first feature" and "second feature" may include one or more of the features. In the description of the present invention, "plurality" means two or more. In the description of the present invention, a first feature "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them. In the description of the present invention, a first feature "above", "above" and "above" a second feature may include the first feature being directly above and obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature.

[0085] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example.

[0086] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A camera module, characterized in that: include: A first optical path conversion component, the first optical path conversion component comprises a first prism and a first driving member, the first driving member is connected to the first prism to drive the first prism to rotate around a first direction; wherein the rotation axis of the first prism is arranged along the first direction; the first prism comprises a prism seat and a triangular prism, and the incident surface of the triangular prism and the exit surface of the triangular prism are perpendicular to each other, the reflection surface of the triangular prism is formed as an inclined surface having an angle with the incident surface of the triangular prism and the exit surface of the triangular prism, and the inclined surface of the triangular prism is mounted on the prism seat; A lens, comprising a plurality of lenses, and arranged toward an exit surface of the first prism; A second optical path conversion component, the second optical path conversion component comprises at least one prism, a second driving member, and a third driving member, wherein the initial incident surface of the at least one prism, the lens, and the first prism are sequentially arranged along a third direction, and the prism to which the initial incident surface belongs is connected to the second driving member to be driven to rotate around a second direction; an image sensing element, wherein the image sensing element and a final emission surface of the at least one prism are arranged opposite to each other in a third direction or a first direction, and the at least one prism is connected to the third driving member in directions opposite to each other so as to be driven to move, and any two of the first direction, the second direction, and the third direction are perpendicular to each other; and At least one circuit board, the first driving member, the second driving member, and the third driving member are electrically connected to the at least one circuit board.

2. The camera module according to claim 1, characterized in that: The second optical path conversion component comprises: A second prism, the second prism being configured to be rotatable about a second direction, the incident surface of the second prism being formed as an initial incident surface; and A third prism, wherein an exit surface of the third prism is formed as a final exit surface, the third prism and the second prism are arranged opposite to each other in a first direction, and the light emitted from the third prism is opposite to the direction of the light incident on the second prism, the third prism and the second prism are constructed to be able to move synchronously along a third direction, and the image sensing element and the third prism are arranged opposite to each other in the third direction.

3. The camera module according to claim 2, characterized in that: The second optical path conversion component also includes a second shell, a mounting seat arranged in the second shell, and a transmission mechanism. The second prism is rotatably connected to the mounting seat, and the third prism is fixed to the mounting seat. The transmission mechanism is connected between the mounting seat and the third driving member to drive the mounting seat to drive the second prism and the third prism to move along the third direction.

4. The camera module according to claim 3, characterized in that: The transmission mechanism includes a screw rod and a threaded sleeve. The screw rod is connected to the third driving member fixed in the second housing. The threaded sleeve is integrally formed with the mounting seat. The screw rod and the threaded sleeve are transmitted through threads.

5. The camera module according to claim 3, characterized in that: The second optical path conversion component also includes: a guide rod, which is fixed in the second shell, and the mounting seat has a sliding hole that slidably cooperates with the guide rod. The screw rod in the transmission mechanism and the guide rod are respectively arranged on two opposite sides of the mounting seat in the first direction.

6. The camera module according to claim 3, characterized in that: An inverted trapezoidal mounting groove is provided on one side of the mounting seat facing the lens, and the second prism and the third prism extend into the mounting groove and are respectively mounted on two side walls of the mounting groove.

7. The camera module according to any one of claims 3 to 6, characterized in that: It also includes a first displacement sensing element, a second displacement sensing element, and a third displacement sensing element, and the number of the circuit boards is three and they are respectively the first circuit board, the second circuit board, and the third circuit board; The first circuit board includes a first driving integrated circuit, and the first driving element and the first displacement sensing element are both electrically connected to the first driving integrated circuit to control the first driving element according to the displacement information sent by the first displacement sensing element; The second circuit board includes a second driving integrated circuit and a third driving integrated circuit. The second driving component and the second displacement sensing element are both electrically connected to the second driving integrated circuit to control the second driving component according to the displacement information emitted by the second displacement sensing element. The third driving component and the third displacement sensing element are both electrically connected to the third driving integrated circuit to control the third driving component according to the displacement information emitted by the third displacement sensing element.

8. The camera module according to claim 7, characterized in that: The second driving member includes an induction coil and a magnet, wherein the induction coil is disposed on the mounting seat, and the magnet is embedded in a side of the prism facing the induction coil, a portion of the second circuit board passes through the mounting seat to be connected to the induction coil, and the second displacement sensing element is connected to the second circuit board and at least partially extends out of the hollow space of the induction coil.

9. The camera module according to claim 7, characterized in that: The third driving component is a micro stepping motor. The third driving component and the third displacement sensing element are integrated on the second circuit board. The second circuit board is located below the mounting seat and is opposite to a portion of the second prism and the third prism.

10. The camera module according to claim 7, characterized in that: The first optical path conversion assembly includes a first housing, the first prism is connected inside the first housing via a first rotating shaft, and the first circuit board extends outside the first housing; The lens comprises a lens barrel, and the lens is arranged in the lens barrel; The first housing and the second housing of the second optical path conversion assembly are respectively connected to the two ends of the lens barrel, and a part of the second circuit board, the second driver integrated circuit, the third driver integrated circuit, and the third circuit board extend out of the second housing.

11. The camera module according to claim 7, characterized in that: The first displacement sensing element, the second displacement sensing element, and the third displacement sensing element are any one of a Hall element, a giant magnetometer, and a tunnel magnetoresistive sensor.

12. The camera module according to claim 1, characterized in that: The first driving element, the second driving element, and the third driving element are selected from any one of a voice coil motor, a stepping motor, and a piezoelectric motor.

13. The camera module according to any one of claims 2 to 6, characterized in that: In the third direction, the image sensing element is embedded in the lens barrel of the lens or the second housing of the second optical path conversion assembly.

14. A mobile terminal, characterized in that: Comprising a camera module as described in any one of claims 1-13.

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