Driving device for camera module, camera module and terminal device

Abstract

A driving device (1000) for a camera module (2000), the camera module (2000) and a terminal device (4000) are provided. The driving device (1000) comprises a first driving device (1100), a second driving device (1200), and a set of elastic supporting components (1300) connecting the first driving device (1100) and the second driving device (1200) and suspending the first driving device (1100) in the direction of the optical axis of the camera module (2000). The elastic supporting component (1300) comprises a first horizontal end (1310), a vertical bending end (1330) connected with the first horizontal end (1310), and a second horizontal end (1320) connected with the other end of the vertical bending end (1330). The set of elastic supporting components (1300) is arranged between the first driving device (1100) and the second driving device (1200) to replace the suspension wire structure, to provide more reliable support for the relative movement between the two, and to reduce the assembly complexity and manufacturing cost.

Description

Technical Field

[0001] This application belongs to the field of camera modules, and specifically relates to a driving device for a camera module, a camera module, and a terminal device. Background Technology

[0002] In mobile phones and other electronic terminals, the camera module has become an indispensable part. To meet the high-definition requirements of video recording, the camera module is required to be able to autofocus, which is achieved by driving the lens to move vertically through a drive mechanism.

[0003] On the one hand, the demand for thinner and lighter smartphones has necessitated smaller installation spaces for camera modules. Traditional VCM motors, including magnets and coils, can drive the lens assembly to the target position for autofocus, but their complex structure increases the size of the camera module, making it difficult to reduce its overall size and achieve miniaturization. On the other hand, to meet diverse and high-definition imaging needs, large apertures and large image planes are being introduced into camera modules, leading to an increase in the number of lens elements and lens weight. Traditional VCM motors tend to have insufficient driving force and also suffer from high power consumption in conventional methods. SMA (shape memory alloy) materials, due to their heat-shrinkage properties, have been developed as another viable actuator to replace existing VCM drivers. Compared to VCM drivers, SMA drivers can meet the miniaturization requirements.

[0004] Furthermore, in actual photography and videography, even slight shaking can cause image blurring and unclear images, especially when shooting handheld with a mobile phone. This blurring caused by hand tremors is even more common. Therefore, Optical Image Stabilization (OIS) has been introduced into various high-end mobile phones to solve the blurring problem caused by hand tremors. The principle of OIS stabilization is to detect the positional shift caused by shaking using a position detection device, such as a gyroscope. Based on this shift, it calculates the displacement that needs to be corrected and drives the optical image stabilization actuator to drive the corresponding direction and offset to reach the specified position, thereby compensating for the corresponding position and angle, and overcoming the blurring problem caused by shaking.

[0005] Existing optical image stabilization (OIS) devices consist of a planar moving anti-shake coil perpendicular to the optical axis, an anti-shake magnet, and a suspension wire structure. For example, an OIS device may include a lens unit, a lens drive unit for autofocus and shake correction, and an imaging unit. The lens drive unit includes a movable OIS part, a fixed OIS part, and a support member. The movable OIS part is connected to the fixed OIS part via the support member, which consists of four suspension wires. One end of each wire is fixed to the movable OIS part, and the other end is fixed to the fixed OIS part. The movable OIS part is oscillatingly supported by the suspension wires in the XY plane. Summary of the Invention

[0006] This application aims to provide a driving device for a camera module, which replaces the suspension structure by setting a set of elastic supports between the first driving device and the second driving device, providing more reliable support for the relative movement between the two and reducing assembly complexity and manufacturing cost.

[0007] According to a first aspect of this application, a driving device for a camera module is provided, comprising:

[0008] First driving device;

[0009] Second drive unit;

[0010] A set of elastic support components connects the first driving device and the second driving device, and suspends the first driving device in the optical axis direction of the camera module;

[0011] The elastic support component includes,

[0012] First horizontal end;

[0013] The vertically bent end is connected to the first horizontal end;

[0014] The second horizontal end is connected to the other end of the vertically bent end.

[0015] According to some embodiments of this application, the first driving device includes a base; the second driving device includes a substrate; the set of elastic support members are disposed on the substrate; the first horizontal end is fixed on the substrate; and the second horizontal end suspends and supports the base in the optical axis direction of the camera module.

[0016] According to some embodiments of this application, the first horizontal end is connected to the substrate via a height adjustment block.

[0017] According to some embodiments of this application, the second horizontal end is higher than the first horizontal end in the optical axis direction of the camera module.

[0018] According to some embodiments of this application, the base includes a set of protrusions corresponding to the second horizontal end, and the second horizontal end supports the base in a suspended manner through the protrusions.

[0019] According to some embodiments of this application, the first driving device includes:

[0020] First fixed support component;

[0021] The elastic support body is fixed to the first fixed support component;

[0022] The base is connected to the first fixed support component and provides support for the first fixed support component.

[0023] The second drive unit includes:

[0024] Second fixed support component;

[0025] The substrate is connected to the second fixed support component and provides support for the second fixed support component.

[0026] The set of elastic support components is disposed around the elastic support body;

[0027] The first horizontal end extends outward from the elastic support body;

[0028] The second horizontal end is fixed to the second fixed support component, and together with the elastic support body, it suspends and supports the first driving device in the optical axis direction of the camera module.

[0029] According to some embodiments of this application, the elastic support body is higher than the second horizontal end in the optical axis direction of the camera module.

[0030] According to some embodiments of this application, the elastic support member is fixed to the first fixed support member by at least three support points.

[0031] According to some embodiments of this application, the first driving device is an SMA driving device; the second driving device is an OIS driving device.

[0032] According to some embodiments of this application, the set of elastic support components includes: four elastic support components disposed at the four corners of the first driving device or the second driving device.

[0033] According to some embodiments of this application, the elastic support component includes: a metal spring sheet.

[0034] According to some embodiments of this application, the vertically bent end includes:

[0035] First elastic arm;

[0036] The second elastic arm is obliquely crossed and connected to the first elastic arm.

[0037] According to some embodiments of this application, the second elastic arm is connected to the first elastic arm via an L-shaped horizontal connecting portion.

[0038] According to some embodiments of this application, the first elastic arm or the second elastic arm includes at least one U-shaped elastic arm.

[0039] According to some embodiments of this application, the SMA driving device further includes:

[0040] Lens carrier;

[0041] A first driver is disposed on the base, connected to the lens carrier, and drives the lens carrier to move upward along the optical axis of the camera module;

[0042] The second driver is disposed on the base, connected to the lens carrier, and drives the lens carrier to move downward along the optical axis of the camera module.

[0043] According to some embodiments of this application, the lens carrier includes:

[0044] Carrier support;

[0045] The first bending block is disposed on the outer periphery of the carrier support;

[0046] The second bending block is disposed on the outer periphery of the carrier support.

[0047] According to some embodiments of this application, the first driver includes:

[0048] First SMA drive line;

[0049] The first fixing device is connected to both ends of the first SMA drive line.

[0050] According to some embodiments of this application, the second driver includes:

[0051] Second SMA drive line;

[0052] The second fixing device is connected to both ends of the second SMA drive line.

[0053] According to some embodiments of this application, the first SMA drive line cooperates with the first bending block to drive the lens carrier to move upward.

[0054] According to some embodiments of this application, the second SMA drive line cooperates with the second bending block to drive the lens carrier to move downward.

[0055] According to some embodiments of this application, the OIS driving device further includes:

[0056] A set of magnetic bodies is connected to the base;

[0057] A set of coils is disposed on the substrate and is positioned opposite to the set of magnetic bodies. The magnetic force between the set of coils and the set of magnetic bodies drives the SMA driving device to move horizontally in a direction perpendicular to the optical axis of the camera module.

[0058] According to a second aspect of this application, a camera module is provided, comprising:

[0059] The drive device as described above;

[0060] The lens assembly is connected to the lens carrier.

[0061] According to a third aspect of this application, a terminal device is provided, including the camera module described above.

[0062] The driving device for the camera module provided in this application achieves autofocus by driving the lens assembly to move up and down along the optical axis via an SMA driving device; and achieves manual image stabilization by driving the lens assembly to move horizontally in the plane perpendicular to the optical axis via an OIS driving device. A set of elastic supports is set between the SMA driving device and the OIS driving device to replace the suspension structure, providing more reliable support for the relative movement between the two and reducing assembly complexity and manufacturing cost.

[0063] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0064] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application.

[0065] Figure 1 A schematic diagram of the camera module structure is shown.

[0066] Figure 2 A structural diagram of a drive device according to a first exemplary embodiment of this application is shown.

[0067] Figure 3 An exploded view of a drive device according to a first exemplary embodiment of this application is shown.

[0068] Figure 4 A schematic diagram of a set of elastic support components is shown according to a first exemplary embodiment of this application.

[0069] Figure 5 An exploded view of an SMA drive device according to a first embodiment of this application is shown.

[0070] Figure 6 An exploded view of an OIS drive device according to a first embodiment of this application is shown.

[0071] Figure 7 A structural diagram of a drive device according to a second embodiment of this application is shown.

[0072] Figure 8 An exploded view of a drive device according to a second embodiment of this application is shown.

[0073] Figure 9 A schematic diagram of a set of elastic support components is shown according to a second embodiment of the present application.

[0074] Figure 10 A perspective view of a camera module according to an example embodiment of this application is shown.

[0075] Figure 11 An exploded view of a camera module according to a first embodiment of this application is shown.

[0076] Figure 12 An exploded view of a camera module according to a second embodiment of this application is shown.

[0077] Figure 13 A schematic diagram of the terminal device composition according to an example embodiment of this application is shown. Detailed Implementation

[0078] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein. These embodiments are provided to make this application more comprehensive and complete, and to fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar parts, and therefore repeated descriptions of them will be omitted.

[0079] Furthermore, the described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Numerous specific details are provided in the following description to give a thorough understanding of embodiments of this application. However, those skilled in the art will recognize that the technical solutions of this application can be practiced without one or more of the specific details, or other methods, components, apparatuses, steps, etc., can be employed. In other instances, well-known methods, apparatuses, implementations, or operations are not shown or described in detail to avoid obscuring various aspects of this application.

[0080] It should be understood that although the terms first, second, etc., may be used herein to describe various components, these components should not be limited by these terms. These terms are used to distinguish one component from another. Therefore, the first component discussed below may be referred to as the second component without departing from the teachings of this application. As used herein, the term "and / or" includes all combinations of any and more of the associated listed items.

[0081] Those skilled in the art will understand that the accompanying drawings are merely schematic diagrams of exemplary embodiments and may not be to scale. The modules or processes shown in the drawings are not necessarily essential for implementing this application and therefore should not be used to limit the scope of protection of this application.

[0082] The inventors have discovered that while the suspension cable structure can support the lens assembly and SMA drive mechanism and correct shake in existing optical image stabilization devices, it is difficult and complex to assemble, resulting in high losses and costs during assembly. Furthermore, the suspension cable structure is not highly reliable.

[0083] To address the aforementioned technical problems, this application provides a driving device for a camera module that achieves automatic focusing and shake correction while using an elastic support structure instead of a suspension structure. This simplifies the assembly process, improves reliability, and enables mass production, thereby reducing costs.

[0084] The technical solution of this application will be described in detail below with reference to the accompanying drawings.

[0085] Figure 1 A schematic diagram of the camera module structure is shown.

[0086] In mobile phones and other electronic terminals, such as Figure 1 As shown, the camera module 2000 typically includes a circuit board 2500, a photosensitive element 2400 attached to the circuit board 2500, a photosensitive component support 2300, a lens assembly 2100, a lens carrier 1110, a driving device 1000, and a metal housing 2200. The photosensitive component support 2300 includes a base for supporting a color filter and a color filter attached to the base. The lens assembly 2100 includes an optical system composed of one or more lenses, arranged along the optical axis with the photosensitive chip 2400, allowing the optical system to focus the image onto the photosensitive chip 2400, thereby achieving imaging.

[0087] The lens assembly 2100 is disposed within the inner cavity of the lens carrier 1110. The drive device 1000 includes an autofocus drive device and an optical image stabilization drive device. The autofocus drive is connected to the lens carrier 1110 and drives the lens carrier and lens to move up and down along the optical axis, thereby achieving autofocus. The optical image stabilization drive device is disposed below the lens carrier and the autofocus drive device, and is used to drive the lens carrier, lens assembly, and autofocus drive device to move in a plane perpendicular to the optical axis, thereby achieving shake correction.

[0088] According to a first aspect of this application, a driving device 1000 for a camera module is provided, such as... Figure 2 , Figure 7As shown. The driving device 1000 includes: a first driving device 1100, a second driving device 1200, and a set of elastic support members 1300. According to some embodiments of this application, the first driving device 1100 can be an SMA driving device for driving the lens assembly to move up and down along the optical axis; the second driving device 1200 can be an OIS driving device for driving the lens assembly to move horizontally in a plane perpendicular to the optical axis. A set of elastic support members 1300 connects the first driving device 1100 and the second driving device 1200, and suspends the first driving device 1100 in the optical axis direction of the camera module.

[0089] The driving device provided in this application will now be described in detail with reference to specific embodiments.

[0090] Figure 2 This diagram illustrates the structure of a drive device according to a first exemplary embodiment of the present application. Figure 3 An exploded view of the drive device according to a first exemplary embodiment of this application is shown; Figure 4 A schematic diagram of a set of elastic support components is shown according to a first exemplary embodiment of this application.

[0091] According to the first embodiment of this application, see Figure 2 and Figure 3 The SMA drive device 1100 includes a lens carrier 1110, a first spring 1120, an upward SMA driver 1130, a downward SMA driver 1140, a second spring 1150, and a base 1160. The OIS drive device 1200 includes a substrate 1210, a set of coils 1220, and a set of magnetic materials. Figure 3 (Not shown). A set of elastic support members 1300 is disposed on the substrate 1210. According to an example embodiment of this application, the set of elastic support members 1300 may be four elastic support members disposed at the four corners of the substrate 1210.

[0092] like Figure 3 and 4As shown, the elastic support component 1300 includes a first horizontal end 1310, a second horizontal end 1320, and a vertically bent end 1330. The first horizontal end 1310 is fixed to the substrate 1210. One end of the vertically bent end 1330 is connected to the first horizontal end 1310, and the other end is connected to the second horizontal end 1320. The second horizontal end 1320 suspends and supports the base 1160 in the optical axis direction of the camera module. According to some embodiments of this application, the first horizontal end 1310 and the second horizontal end 1320 may have a structural height difference; for example, the second horizontal end 1320 may be higher than the first horizontal end 1310 in the optical axis direction of the camera module. According to other embodiments of this application, the first horizontal end 1310 may also be connected to the substrate 1210 via a height adjustment block 1400 and fixed to the substrate 1210.

[0093] The second horizontal end 1320 is higher than the first horizontal end 1310 in the optical axis direction of the camera module and is connected to the base 1160 of the SMA driving device, providing a suspended elastic support for the SMA driving device. The first horizontal end 1310 is raised by the height adjustment block 1400, which also allows a gap between the lower surface of the second horizontal end 1320 and the substrate 1210 of the OIS driving device 1200, making it suspended and providing space for the vertical movement of the SMA driving device. The upper surface of the second horizontal end 1320 contacts the bottom of the base 1160 of the SMA driving device 1100, thereby providing elastic support. According to some other embodiments of this application, the bottom of the base 1160 includes a set of protrusions 1161, which are correspondingly arranged with the second horizontal end 1320, and the second horizontal end 1320 supports the base suspended by the protrusions 1161. By providing a protrusion 1161 at the bottom of the base 1160, the gap between the first horizontal end 1310 and the base 1160 can be guaranteed, especially when a height adjustment block is provided.

[0094] like Figure 4 As shown, according to an example embodiment of this application, the elastic support member 1300 may be a metal spring sheet, such as a leaf spring. According to other example embodiments of this application, the vertically bent end 1330 may include a first elastic arm and a second elastic arm. The first elastic arm is obliquely crossed with the second elastic arm. For example, they are connected via an L-shaped horizontal connecting portion 1340. The first elastic arm or the second elastic arm may include at least one U-shaped elastic arm.

[0095] See Figure 3In the example embodiment of this application, there are two U-shaped elastic arms, and the number can be set as needed. This application does not limit this. The vertical bending end 1330 is connected by multiple bends, which increases the deformation strength of the support component and thus improves reliability. It allows the base 1160 to move on the plane relative to the substrate 1210 without causing the elastic support component 1300 to twist and bend, which would lead to the base flipping over.

[0096] According to the example embodiments of this application, the connection method between the height adjustment block 1400 and the substrate 1210, and between the first horizontal end 1310 and the height adjustment block 1400, can be one of bonding, welding or mechanical connection, and this application is not limited thereto.

[0097] Figure 5 An exploded view of an SMA drive device according to a first exemplary embodiment of this application is shown.

[0098] The SMA driving device 1100 includes a lens carrier 1110, a first spring 1120, a first driver 1130, a second driver 1140, a second spring 1150, and a base 1160. The first driver 1130 and the second driver 1140 are connected to the lens carrier 1110. The first driver 1130 drives the lens carrier 1110 to move upwards along the optical axis of the camera module; the second driver 1140 drives the lens carrier 1110 to move downwards along the optical axis of the camera module.

[0099] According to an example embodiment of this application, the lens carrier 1110 includes a carrier body 1111 and a carrier cavity 1112, and the lens assembly is held in the carrier cavity 1112 by the carrier body 1111. The carrier body 1111 further has an inner wall 1113 with a threaded structure for connecting the lens assembly. The shape of the inner wall 1113 is adapted to the outer peripheral shape of the lens assembly.

[0100] The carrier body 1111 further includes a carrier ring 1114 and a carrier support 1115, wherein the carrier support 1115 is integrally disposed on the outer periphery of the carrier ring 1114. The first driver 1130 and the second driver 1140 provide upward and downward forces on the carrier ring 1114 through the carrier support 1115, thereby driving the lens carrier 1110 to move upward or downward.

[0101] The carrier body 1111 further includes a first bending block 1116 and a second bending block 1117, which are disposed around the carrier support 1115 and are used to cooperate with the first driver 1130 and the second driver 1140 respectively to drive the lens carrier 1110 to move up and down.

[0102] The lens carrier 1110 also includes a first limiting device 1118 for limiting the maximum distance that the lens carrier 1110 can move upward when driven. The limiting device 1118 extends upward from the upper surface of the carrier support 1115 and can be an integral part of the carrier support 1115.

[0103] The lens carrier 1110 also includes a spacer 1119 disposed around the carrier support 1115 to separate the lens carrier 1110 from the inner wall of the camera module housing. The spacer 1119 is integrally disposed on the lens carrier 1110, extends outward from the side of the carrier support 1115, and protrudes outward from the positions of the first driver 1130 and the second driver 1140, thereby restricting the SMA lines of the first driver 1130 and the second driver 1140 from contacting the housing of the camera module.

[0104] The first actuator 1130 includes a first SMA drive line 1131 and a first fixing device 1132, wherein both ends of the first SMA drive line 1131 are disposed on the first fixing device 1132, and the first actuator 1130 is fixed to the base 1160 by the first fixing device 1132. The first SMA drive line 1131 of the first actuator 1130 is disposed below the first bending block 1116, wherein the first SMA drive line 1131 of the first actuator 1130 contracts and stretches in a thermally driven manner, thereby pushing the first bending block 1116 to move upward.

[0105] The second actuator 1140 includes a second SMA drive line 1141 and a second fixing device 1142, wherein both ends of the second SMA drive line 1141 are disposed on the second fixing device 1142, and the second actuator 1140 is fixed to the base 1160 by the second fixing device 1142. The second SMA drive line 1141 of the second actuator 1140 is disposed below the second bending block 1117, wherein the second SMA drive line 1141 retracts in a thermally driven manner, thereby pulling the second bending block 1117 downward.

[0106] It should be noted that the SMA wire achieves thermal actuation through self-heating or heating by a heat source. That is, the SMA wire can be heated by its own heat or by other heat sources, causing it to contract in length, thereby driving the movement of the movable component. Preferably, in the first preferred embodiment of this application, the SMA wire is thermally actuated by its own electric heating, and the magnitude of the driving force of the SMA wire is controlled by controlling the magnitude of the current in the SMA wire. In short, when the current in the SMA wire increases, the temperature of the electrically heated SMA wire rises, causing the SMA wire to thermally contract, thus increasing the driving force of the SMA wire; when the current in the SMA wire decreases, the temperature of the electrically heated SMA wire decreases, or the temperature of the SMA wire decreases at ambient temperature, causing the SMA wire to relax, thus decreasing the driving force of the SMA wire.

[0107] According to an example embodiment of this application, the height of the first fixing device 1132 is greater than the height of the second fixing device 1142. The first fixing device 1132 supports both ends of the first SMA drive line 1131, allowing the first SMA drive line 1131 to bypass the first bending block 1116, forming a "V"-shaped traction structure. Correspondingly, the first fixing device 1142 supports both ends of the second SMA drive line 1141, allowing the first SMA drive line 1141 to bypass the second bending block 1117, forming an inverted "V"-shaped traction structure. Thus, the first driver 1130 and the second driver 1140 of the SMA drive device 1100 provide mutually opposing forces to the lens carrier 1110, driving the lens assembly to move upward and downward by driving the lens carrier 1110.

[0108] The first spring 1120 is disposed above the lens carrier 1110, and the second spring 1150 is disposed below the lens carrier 1110, supporting the lens carrier 1110. In a static, unpowered state, the first spring 1120 and the second spring 1150 jointly support the lens carrier 1110, maintaining the lens in a centered position through the lens carrier 1110. When the lens carrier 1110 is driven upward or downward by the SMA drive device 1100, the first spring 1120 and the second spring 1150 balance the supporting forces on the lens carrier 1110 in all directions, so that the driving forces on the lens carrier 1110 are the same in all directions, thereby maintaining the stability of the lens assembly during the driving process through the lens carrier 1110.

[0109] The first spring piece 1120 includes a first spring piece ring 1121 and a first extension portion 1222 extending outward from the first spring piece ring 1121. The first spring piece ring 1121 is disposed on the carrier ring 1114 of the lens carrier 1110, and its size is adapted to the carrier ring 1114. According to some embodiments of this application, the first spring piece 1120 is a thin sheet-like elastomer with a hollow structure, capable of withstanding a certain force and returning to its original shape under elastic action. The first spring piece 1120 can be manufactured by mechanical stamping or etching.

[0110] In its initial state, the first spring 1120 is in a naturally extended state, wherein the first spring ring 1121 and the first extension 1222 are on the same horizontal plane. When the first spring ring 1121 is driven upward by the lens carrier 1110, the intermediate connecting portion between the first spring ring 1121 and the first extension 1222 undergoes elastic deformation. The first extension 1222 provides a downward elastic force to the lens carrier 1110.

[0111] The second spring 1150 further includes a second spring ring 1151 and a second support end 1152 extending outward from the second spring ring 1151. The second spring 1150 is disposed on the base 1160. The second spring ring 1151 is disposed below the carrier ring 1114 of the lens carrier 1110, and its size is adapted to the carrier ring 1114, providing an upward supporting force to the lens carrier 1110. According to an example embodiment of this application, the second spring 1150 is a thin sheet-like elastomer with a hollow structure, which can be manufactured by mechanical stamping or etching. According to an example embodiment of this application, the first spring 1120 and the second spring 1150 can be elastic devices made of metal.

[0112] In the initial state, the second spring ring 1151, supported by the base 1160, supports the lens carrier 1110 upwards, positioning the lens assembly in a central position. When the second driver 1140 of the SMA drive device 1100 drives the lens carrier 1110 downwards, the lens carrier 1110 presses the second spring ring 1151 downwards, causing the second support end 1152 of the second spring ring 1151 to undergo elastic deformation. The second support end 1152 supports the horizontal force balance of various parts of the lens carrier 1110. The second spring ring 1151 provides an upward elastic force to the lens carrier 1110, supporting the lens carrier 1110 to move upwards and return to the central position.

[0113] The base 1160 includes a base body 1161, a boss 1162, and a second limiting device 1163. The boss 1162 is disposed at a corner of the base body 1161 for positioning and mounting the camera module housing and the base 1160. It is understood that the boss 1162 protrudes upwards from the plane of the base body 1161. The second limiting device 1163 may extend upwards integrally from the upper surface of the base body 1161. The distance between the second limiting device 1163 and the lens carrier 1110 is the maximum downward movement distance of the lens assembly. When the lens carrier 1110 is driven downwards by the second driver 1140, the distance at which the lens carrier 1110 contacts the second limiting device 1163 is the maximum downward mechanical stroke of the lens carrier 1110.

[0114] Figure 6 An exploded view of an OIS drive device according to a first exemplary embodiment of this application is shown.

[0115] In the camera module, the OIS drive unit 1200 is located below the SMA drive unit 1100. For example... Figure 6 As shown, the OIS driving device 1200 includes a substrate 1210, a set of coils 1220, and a set of magnets 1230. The set of magnets 1230 is connected to the base of the SMA driving device. The set of coils 1220 is disposed on the substrate 1210 and is disposed opposite to the set of magnets 1230. The OIS driving device 1200 also includes a position sensing element (not shown) disposed on the substrate 1210 and adjacent to the set of coils 1220. The position sensing element can sense the position of the lens assembly of the camera module. Based on the position information obtained by the sensing element, the SMA driving device can be driven by the magnetic force between the set of coils 1220 and the set of magnets 1230, thereby causing the lens assembly to move horizontally in a direction perpendicular to the optical axis of the camera module, thus achieving shake correction.

[0116] According to some embodiments of this application, the number of a set of magnetic bodies 1230 and a set of coils 1220 can be four, respectively disposed at the four corners of the substrate 1210. The magnetic bodies can be magnets, magnets, or other components. The set of magnetic bodies 1230 and the set of coils 1220 together constitute the OIS driving structure.

[0117] Figure 7 This diagram illustrates the structure of a drive device according to a second exemplary embodiment of this application. Figure 8 An exploded view of the drive device according to a second exemplary embodiment of this application is shown; Figure 9 A schematic diagram of a set of elastic support components is shown according to a second exemplary embodiment of this application.

[0118] According to the second embodiment of this application, as Figure 7 and 8 As shown, the SMA drive device 1100 includes a lens carrier 1110, an upward SMA driver 1130, a downward SMA driver 1140, a base 1160, a first fixed support member 1170 disposed on the base 1160, and a first elastic support body 1310 fixedly connected to the first fixed support member 1170. According to some embodiments of this application, the elastic support member 1300 can be fixed to the first fixed support member 1170 by at least three support points. According to an example embodiment of this application, the first fixed support member 1170 can be a set of positioning posts disposed on the base 1160, the number of which can be determined according to requirements, for example, four. The SMA drive device 1100 also includes a second elastic support body (not shown) disposed on the base 1160, located below the lens carrier 1110, supporting the lens carrier 1110.

[0119] The OIS drive unit 1200 is located below the SMA drive unit 1100. For example... Figure 8 As shown, the OIS driving device 1200 includes a substrate 1210, a set of coils 1220, a set of magnets 1230, and a second fixed support component 1240. The set of magnets 1230 is connected to the base 1610 of the SMA driving device. The set of coils 1220 is disposed on the substrate 1210 and is disposed opposite to the set of magnets 1230. The OIS driving device 1200 also includes a position sensing element (not shown) disposed on the substrate 1210 and adjacent to the set of coils 1220. The position sensing element can sense the position of the lens assembly of the camera module. Based on the position information obtained by the sensing element, the SMA driving device can be driven by the magnetic force between the set of coils 1220 and the set of magnets 1230, thereby causing the lens assembly to move horizontally in a direction perpendicular to the optical axis of the camera module, thus achieving shake correction.

[0120] A set of elastic support components 1300 is used to connect the first drive unit 1100 and the second drive unit 1200. For example... Figure 8 and 9As shown, a set of elastic support components 1300 can be a set of spring pieces 1320. A set of spring pieces 1320 is disposed around the periphery of the elastic support body 1310. Each spring piece 1320 includes a first horizontal end 1321, a second horizontal end 1322, and a vertically bent end 1324. The first horizontal end 1321 is connected to the elastic support body 1310 and extends outward from it. One end of the vertically bent end 1324 is connected to the first horizontal end 1321, and the other end is connected to the second horizontal end 1322. According to an example embodiment of this application, a set of spring pieces 1320 can be four spring pieces, disposed at the four corners of the periphery of the elastic support body 1310. Figure 8 As shown, the first horizontal end 1321 of the elastic support member 1300 is fixedly connected to the elastic support body 1310 of the first driving device 1100, and the second horizontal end 1322 is fixedly connected to the second driving device 1200. According to some embodiments of this application, the elastic support body 1310 is higher than the second horizontal end 1322 in the optical axis direction of the camera module, thereby suspending and supporting the first driving device 1100 in the optical axis direction of the camera module.

[0121] like Figure 9 As shown, according to an example embodiment of this application, the elastic support member 1300 may be a metal spring sheet, such as a leaf spring. According to other example embodiments of this application, the vertically bent end 1324 may include a first elastic arm and a second elastic arm. The first elastic arm and the second elastic arm are obliquely intersecting, meaning the first elastic arm and the second elastic arm are in different planes. For example, if connected by an L-shaped horizontal connecting portion 1323, the planes containing the first elastic arm and the second elastic arm are perpendicular to each other. The first elastic arm or the second elastic arm may include at least one U-shaped elastic arm.

[0122] See Figure 9 In the example embodiment of this application, there are two U-shaped elastic arms, and the number can be set as needed. This application does not limit this. The vertical bending end 1324 is connected by multiple bends, which increases the deformation strength of the support component and thus improves reliability. It allows the first drive device 1100 to move relative to the second drive device 1200 on the plane, while making it less likely for the elastic support component 1300 to twist and bend, thus affecting the support stability.

[0123] The second aspect of this application concerns the specific structure and working principle of the first driver 1130, the second driver 1140, and the lens carrier 1110 of the SMA drive device 1100 in the embodiments. Figure 5 The same applies to the above, so I will not repeat it here.

[0124] According to some embodiments of this application, see Figure 8The OIS driving device 1200 may contain four sets of magnetic bodies 1230 and four sets of coils 1220, respectively disposed at the four corners of the substrate 1210. The magnetic bodies may be magnets, magnets, or other similar components. The set of magnetic bodies 1230 and the set of coils 1220 together constitute the OIS driving structure. The second fixed support member 1240 is fixedly connected to the second horizontal end 1322 of the elastic support member 1300. According to some embodiments of this application, the second fixed support member 1240 may be a set of positioning posts, the position and number of which can be set according to requirements, corresponding to the position and number of the set of spring pieces 1320.

[0125] The SMA drive unit 1100 and the OIS drive unit 1200 are suspended and elastically supported by the elastic support component 1300. This allows the SMA drive unit 1100 to move up and down relative to the OIS drive unit 1200 along the optical axis within a certain range to achieve autofocus; it also allows the SMA drive unit 1100 to move horizontally relative to the OIS drive unit 1200 in a direction perpendicular to the optical axis to achieve shake correction. Moreover, compared with the suspension structure, the elastic support component 1300 has a more stable structure and a simpler assembly process, thereby reducing production costs while ensuring functionality.

[0126] Figure 10 A perspective view of a camera module according to an example embodiment of this application is shown; Figure 11 An exploded view of a camera module according to a first exemplary embodiment of this application is shown; Figure 12 An exploded view of a camera module according to a second exemplary embodiment of this application is shown.

[0127] According to another aspect of this application, a camera module 3000 is provided, such as... Figure 10-11 As shown, the device includes a lens assembly 2100, a drive unit 1000, a lens base 3100, and a housing 2200. The lens assembly 2100 is connected to the lens carrier 1110 of the drive unit 1000. The lens assembly 2100 and the drive unit 1000 are housed within the housing 2200. The lens base 3100 is located below the housing 2200, connected to and supporting the drive unit 1000. Figure 11 The drive unit 1000 in the middle is based on Figure 2 The driving device of the first example embodiment shown; Figure 12 The drive unit 1000 in the middle is based on Figure 7 The driving device of the second example embodiment shown is used. The driving device 1000 drives the lens assembly 2100 to move up and down within the housing 2200 to achieve autofocus, and to move horizontally to achieve shake correction.

[0128] The housing 2200 has an accommodating space 2210 and a light entrance aperture 2220, wherein the light entrance aperture 2220 is formed in the upper part of the housing 2200 and communicates with the accommodating space 2210. Light enters the lens assembly 2100 through the light entrance aperture 2220 so that the lens assembly 2100 can receive incident light from the outside.

[0129] The lens mount 3100 further includes a circuit board 2500, a photosensitive element 2400 attached to the circuit board 2500, a photosensitive component support 2300, and a color filter 2600 disposed on the photosensitive component support 2300. The driving device 1000 drives the lens assembly 2100 to move up and down, so that the optical imaging of the lens assembly 2100 is focused on the photosensitive element 2400, so that the photosensitive element 2400 receives the light focused by the lens assembly 2100. The lens assembly 2100 includes at least a lens 2110, wherein the lens 2110 and the photosensitive element 2400 are arranged along the optical axis of the camera module 3000, so that the optical system composed of the lens 2110 focuses the image onto the photosensitive element 2400.

[0130] In the initial state, the drive device 1000 holds the lens assembly 2100 in a central position, wherein the lens assembly 2100 is maintained at a certain distance from the photosensitive element 2400 along the optical axis. When it is necessary to adjust the imaging position of the lens assembly 2100 for focusing, the drive device 1000 drives the lens assembly 2100 to move up and down along the optical axis to adjust the distance between the lens assembly 2100 and the photosensitive element 2400. When it is necessary to adjust for camera shake, the drive device 1000 drives the lens assembly 2100 to move horizontally up and down in a plane perpendicular to the optical axis.

[0131] Figure 13 A schematic diagram of the terminal device composition according to an example embodiment of this application is shown.

[0132] In addition, such as Figure 13 As shown, this application also provides a terminal device 4000, including the camera module described above.

[0133] See Figure 13 The terminal device 4000 may include: at least one processor 4001, at least one network interface 4004, a user interface 4003, a memory 4005, and at least one communication bus 4002.

[0134] The communication bus 4002 is used to realize the connection and communication between these components.

[0135] The user interface 4003 may include a display screen and the aforementioned camera module 3000. Optionally, the user interface 4003 may also include a standard wired interface and a wireless interface.

[0136] The network interface 4004 may optionally include a standard wired interface or a wireless interface (such as a Wi-Fi interface).

[0137] The processor 4001 may include one or more processing cores. The processor 4001 connects to various parts of the terminal device 3000 via various interfaces and lines, and performs various functions and processes data of the terminal device 3000 by running or executing instructions, programs, code sets, or instruction sets stored in the memory 4005, and by calling data stored in the memory 4005. Optionally, the processor 4001 may be implemented using at least one hardware form of Digital Signal Processing (DSP), Field-Programmable Gate Array (FPGA), or Programmable Logic Array (PLA). The processor 4001 may integrate one or a combination of several of the following: Central Processing Unit (CPU), Graphics Processing Unit (GPU), and modem. The CPU primarily handles the operating system, user interface, and applications; the GPU is responsible for rendering and drawing the content required for display on the screen; and the modem handles wireless communication. It is understood that the modem may also not be integrated into the processor 4001 and may be implemented as a separate chip.

[0138] The memory 4005 may include random access memory (RAM) or read-only memory. Optionally, the memory 4005 may include a non-transitory computer-readable storage medium. The memory 4005 can be used to store instructions, programs, code, code sets, or instruction sets. The memory 4005 may include a program storage area and a data storage area, wherein the program storage area may store instructions for implementing an operating system, instructions for at least one function (such as touch function, sound playback function, image playback function, etc.), instructions for implementing the above-described method embodiments, etc.; the data storage area may store data involved in the above-described method embodiments, etc. Optionally, the memory 4005 may also be at least one storage device located remotely from the aforementioned processor 4001. Figure 9 As shown, the memory 4005, which serves as a computer storage medium, may include an operating system, a network communication module, a user interface module, and a video image processing application.

[0139] This application provides a driving device and a camera module for a camera module. By setting a set of elastic supports between the SMA driving device and the OIS driving device to replace the suspension structure, a more reliable support is provided for the relative movement between the two, and the assembly complexity and manufacturing cost are reduced.

[0140] Obviously, the above embodiments are merely examples for clearly illustrating this application and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this application.

Claims

1. A driving device for a camera module, characterized in that, include: A first driving device, the first driving device comprising: Lens carrier; Base; A first driver is disposed on the base, connected to the lens carrier, and drives the lens carrier to move upward along the optical axis of the camera module; A second driver, disposed on the base, connected to the lens carrier and driving the lens carrier to move downward along the optical axis of the camera module; a second driving device, the second driving device comprising: substrate; A set of magnetic bodies is connected to the base; A set of coils, disposed on the substrate and opposite to the set of magnetic bodies, drives the first driving device to move horizontally in a direction perpendicular to the optical axis of the camera module through the magnetic force between the set of coils and the set of magnetic bodies; a set of elastic support members connects the first driving device and the second driving device, suspending and supporting the first driving device in the direction of the optical axis of the camera module, wherein the elastic support members include: The first horizontal end is fixed on the substrate; A vertically bent end, one end of which is connected to the first horizontal end, wherein the vertically bent end includes a first elastic arm and a second elastic arm, the first elastic arm and the second elastic arm are respectively located on adjacent sides of the base, and the second elastic arm is connected to the first elastic arm through an L-shaped horizontal connecting part; The second horizontal end is connected to the other end of the vertically bent end, and the second horizontal end suspends and supports the base in the optical axis direction of the camera module.

2. The driving device according to claim 1, wherein, The lens carrier includes: Carrier support; The first bending block is disposed on the outer periphery of the carrier support; The second bending block is disposed on the outer periphery of the carrier support.

3. The driving device according to claim 2, wherein, The first driver includes: First SMA drive line; A first fixing device is connected to both ends of the first SMA drive line; the second driver includes: Second SMA drive line; The second fixing device is connected to both ends of the second SMA drive line.

4. The driving device according to claim 3, wherein, The first SMA drive line cooperates with the first bending block to drive the lens carrier to move upward; the second SMA drive line cooperates with the second bending block to drive the lens carrier to move downward.

5. The driving device according to claim 2, wherein, The set of elastic support components is disposed on the substrate.

6. The driving device according to claim 5, wherein, The first horizontal end is connected to the substrate via a height adjustment block.

7. The driving device according to claim 5, wherein, The second horizontal end is higher than the first horizontal end in the optical axis direction of the camera module.

8. The driving device according to claim 5, wherein, The base includes a set of protrusions, which are corresponding to the second horizontal end, and the second horizontal end supports the base by being suspended through the protrusions.

9. The driving device according to claim 5, wherein, The first driving device further includes: A first fixed support component is connected to the base, and the base provides support for the first fixed support component. The elastic support body is fixed to the first fixed support component; The second drive unit also includes: A second fixed support component is connected to the substrate, and the substrate provides support for the second fixed support component. The set of elastic support components is disposed around the elastic support body; The first horizontal end extends outward from the elastic support body; The second horizontal end is fixed to the second fixed support component, and together with the elastic support body, it suspends and supports the first driving device in the optical axis direction of the camera module.

10. The driving device according to claim 9, wherein, The elastic support body is higher than the second horizontal end in the optical axis direction of the camera module.

11. The driving device according to claim 9, wherein, The elastic support component is fixed to the first fixed support component by at least three support points.

12. The driving device according to claim 9, wherein, The set of elastic support components includes: Four elastic support components are disposed at the four corners of the first drive device or the second drive device.

13. The driving device according to claim 1, wherein, The second elastic arm is obliquely crossed and connected to the first elastic arm.

14. The driving device according to claim 13, wherein, The first elastic arm or the second elastic arm includes: At least one U-shaped flexible arm.

15. A camera module, characterized in that, include: The drive device as described in any one of claims 1-14; The lens assembly is connected to the lens carrier.

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