Driving device, camera device and electronic device

Abstract

A driving device, a photographic device and an electronic device are provided, which have an anti-shake function and can shorten the driving time. A first driving mechanism drives the lens in the optical axis direction of the lens. The image sensor generates an image signal according to the light transmitted by the lens; the sensor carrier carries the image sensor; the second driving mechanism is used to drive the sensor carrier in a direction perpendicular to the optical axis direction; the data connector is a flexible member, extending in a strip shape, and is used to connect the image sensor and an external circuit to transmit the image signal. A first driving unit is provided on the front side of the base in the optical axis direction, and an anti-shake driving unit is provided on the rear side in the optical axis direction; the free end of the first extension part of the data connector is connected to the first side of the image sensor, and is separated from the first side in a gradually expanding manner toward the connection end with the second extension part; the second and third extension parts are parallel to and separated from the second and third sides of the image sensor, and an external circuit connection part is provided on one side of the third extension part.

Description

Technical Field

[0001] The invention relates to a driving device, a photographing device using the driving device, and an electronic device using the photographing device. Background Art

[0002] A patent application with Chinese publication number "CN102089695A" discloses a driving module, comprising: a cylindrical or columnar driven body; a cylindrical support body accommodating the driven body on the inside; a leaf spring component, elastically holding the driven body in a manner that enables the driven body to move relative to the support body in a certain direction; and a driving unit, resisting the restoring force of the leaf spring component to drive the driven body in a certain direction. The driving module is characterized in that the driving unit comprises: a shape memory alloy wire, which is engaged with the driven body and drives the driven body by resisting the restoring force of the leaf spring component through contraction caused by heat generated when power is supplied; and a holding terminal, which has an alloy wire holding portion for holding the end of the shape memory alloy wire, the holding terminal having an engaging portion that is engaged with the support body and positioned and a limiting portion that prevents rotation relative to the support body, and the holding terminal is supported and fixed on the support body.

[0003] It is expected that the time required for the lens to stably move to a predetermined position after the driving module is zoomed is further shortened. Summary of the invention

[0004] The object of the present invention is to provide a driving device, a camera device and an electronic device, which have an anti-shake function and can shorten the driving time.

[0005] A driving device includes a first driving unit, an anti-shake driving unit, and a base. The first driving unit includes a lens and a first driving mechanism, and the first driving mechanism drives the lens in the optical axis direction of the lens. The anti-shake driving unit includes an image sensor to generate an image signal according to the light transmitted by the lens; a sensor carrier for carrying the image sensor; a second driving mechanism for driving the sensor carrier in a direction perpendicular to the optical axis direction; and a data connector, which is a flexible member extending in a strip shape and is used to connect the image sensor and an external circuit to transmit the image signal. The first driving unit is arranged on the front side of the base in the optical axis direction, and the anti-shake driving unit is arranged on the rear side of the base in the optical axis direction.

[0006] In one embodiment, the image sensor is square, and the data connector includes a first extension portion, a second extension portion and a third extension portion, the second extension portion connects the first extension portion and the third extension portion; the free end of the first extension portion is connected to the first side of the image sensor, and is separated from the first side in a gradually expanding manner toward the connection end with the second extension portion; the second extension portion is parallel to and separated from the second side of the image sensor, and the third extension portion is parallel to and separated from the third side of the image sensor; an external circuit connection portion is provided on the side of the third extension portion facing away from the third side; and the gap between the data connector and the image sensor provides a movable space for the image sensor.

[0007] In one embodiment, the second driving mechanism includes a plurality of SMA wires, a movable plate and a fixed plate, the SMA wires connecting the movable plate and the fixed plate and changing length according to an input driving signal to drive the movable plate to move relative to the fixed plate, and the sensor carrier is configured to follow the movement of the movable plate.

[0008] In one embodiment, the sensor carrier is disposed at the rearmost side in the optical axis direction of the second driving mechanism, and the image sensor is connected to a rear side surface of the sensor carrier in the optical axis direction.

[0009] In one embodiment, the base includes a supporting substrate, and a surrounding side wall extends from the rear side of the supporting substrate in the direction of the optical axis in parallel with the optical axis, and a cavity portion is surrounded by the surrounding side wall; the anti-shake drive unit is accommodated in the cavity portion.

[0010] A photographing device comprises a lens, an image sensor, and any one of the driving devices described above for driving the lens to generate an image signal on the image sensor.

[0011] An electronic device comprises the above-mentioned camera device.

[0012] The movements of automatic zoom and jitter compensation are independent, that is, automatic zoom will not be affected by the movement of jitter compensation, so the lens can be stabilized quickly. The data connector is arranged around the three sides of the image sensor, and provides a movable space for the image sensor, and connects the image sensor with the external circuit. This arrangement allows the image sensor to be driven by the second driving unit and move in a vertical plane in the direction of the optical axis, and there is a buffer length from the connection between the first extension of the data connector and the image sensor to the external circuit connection part of the third extension of the data connector. The buffer length allows the data connector to be twisted, twisted, etc., but will not generate excessive torque at the connection, forcing the data connector to be disconnected from the image sensor, thereby improving the quality of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The above and other features, properties and advantages of the present invention will become more apparent through the following description in conjunction with the accompanying drawings and embodiments, in which:

[0014] Figure 1 is a perspective view of a first embodiment of a drive device.

[0015] Figure 2 is an exploded view of a first embodiment of the drive device.

[0016] Figure 3A This is a perspective view of the base.

[0017] Figure 3B This is a perspective view of the base from another viewpoint.

[0018] Figure 4A is a perspective view of the second drive mechanism.

[0019] Figure 4B is a perspective view of the second driving mechanism from another viewpoint.

[0020] Figure 5 is an exploded view of the second drive mechanism.

[0021] Fig. 6A is a perspective view of the sensor carrier.

[0022] Figure 6B is a perspective view of the sensor carrier from another viewpoint.

[0023] Fig. 7A is a perspective view of a data connector.

[0024] Figure 7B It is an orthographic view of the data connector mating with the image sensor.

[0025] Figure 8 is an orthographic view of a first embodiment of the drive device.

[0026] Fig. 9 is along Figure 8 Cross-sectional view along line BB.

[0027] Fig.10 is an exploded view of a second embodiment of the drive device. DETAILED DESCRIPTION

[0028] The following discloses a variety of different implementation methods or embodiments of the subject technical solution. To simplify the disclosure, specific examples of each element and arrangement are described below. Of course, these are only examples and are not intended to limit the scope of protection of the present invention. For example, the first feature subsequently recorded in the specification is formed above or on the second feature, which may include an implementation method in which the first and second features are formed by direct connection, and may also include an implementation method in which an additional feature is formed between the first and second features, so that the first and second features may not be directly connected. In addition, the figure marks and / or letters may be repeated in different examples in these disclosures. This repetition is for simplicity and clarity, and does not itself represent the relationship between the various implementation methods and / or structures to be discussed. Further, when the first element is described in a manner connected or combined with the second element, the description includes an implementation method in which the first and second elements are directly connected or combined with each other, and also includes the use of one or more other intervening elements to indirectly connect or combine the first and second elements.

[0029] For ease of understanding, in the embodiments described below, the optical axis direction of the lens 12 is referred to as the Z direction, the direction perpendicular to the optical axis direction is referred to as the X direction, and the direction perpendicular to the Z direction and the X direction is referred to as the Y direction. In addition, the subject side of the optical axis is referred to as the front side, and the opposite side or the side where the image sensor (not shown) is arranged is referred to as the rear side.

[0030] like Figure 1 and Figure 2 The driving device shown includes a first driving unit 1 and a second driving unit 2 , and also includes a base 3 .

[0031] The first driving unit 1 includes a linear driving device 11. In some embodiments, the lens 12 is also regarded as a component of the first driving unit 1. The second driving unit 2 is also referred to as an anti-shake driving unit.

[0032] The implementation of the linear drive device 11 can refer to the lens drive device disclosed in the Chinese patent publication "CN104765125A". The linear drive device 11 generally includes a lens carrier 110, a fixed frame 111, and a first drive mechanism 112. The fixed frame 111 is also called a housing or a yoke, which together with the base 3 described later constitutes a fixed body, and the lens carrier 110 is supported by an elastic element so that it can move freely in the optical axis direction of the lens. Figure 8 and Fig. 9The first driving mechanism 112 includes a magnet 1122 and a coil 1121. The magnet 1122 is disposed on the fixed frame 111, and the coil 1121 is disposed on the lens carrier 110. The positions of the two can also be interchanged. When an excitation current is passed through the coil 1121, an interaction force will be generated between the coil 1121 and the magnet 1122 to push the lens carrier 110 to move along the optical axis direction of the lens 12.

[0033] The implementation method of the linear drive device 11 is not limited thereto, and the linear drive device disclosed in Chinese patent publications "CN101860258A" or "CN102062927A" whose applicant is "Sikao Motor (Shanghai) Co., Ltd." may also be used.

[0034] As mentioned above, the base 3 plays a role in supporting the first driving unit 1 , and not only that, it also plays a role in supporting the second driving unit 2 .

[0035] like Figure 3A and Figure 3B As shown, the base 3 includes a supporting substrate 31, and a surrounding side wall 32 extends parallel to the optical axis at the rear side of the supporting substrate 31, and a cavity 300 is surrounded by the surrounding side wall 32 and the supporting substrate 31. Fig. 9 As shown, the second driving unit 2 is accommodated in the cavity 300, that is, Figure 2 As shown, the first driving unit 1 is fixed to the front side of the base 3 , and the second driving unit 2 is fixed to the rear side of the base 3 .

[0036] The support substrate 31 is roughly square and has a hole 30 for light transmitted through the lens 12. The support substrate 31 is provided with four bosses 310 at the four corners of its front side, and the surface of the outer peripheral side of the bosses 310 facing the outside of the support substrate 31 cooperates with the corners of the fixed frame 111, and the fixed frame 111 is fixed to the support substrate 31 by bonding or other means.

[0037] The second driving unit 2 includes a second driving mechanism 21 and a sensor carrier 22. One implementation of the second driving mechanism 21 is to use an SMA driver, which is driven by SMA (shape memory alloy) material. The sensor carrier 22 is used to carry an image sensor 23, allowing the image sensor 23 to generate an image signal according to the light transmitted by the lens 12. The second driving mechanism 21 drives the sensor carrier 23 to move in a direction perpendicular to the optical axis direction of the lens 12 according to the jitter of the lens carrier 110 to compensate for the jitter.

[0038] The second driving mechanism 21 Figure 4A , Figure 4B as well as Figure 5As shown in FIG. 1 , it includes four SMA wires 214a, 214b, 214c, and 214d. The SMA wires can be extended or shortened according to the input drive current.

[0039] The second driving mechanism 21 further includes a movable plate 213 and a fixed plate, wherein the fixed plate includes a fixed portion 212 and a bottom plate 210. The movable plate 213 is configured as a motion output portion of the second driving mechanism 21 and is connected to the sensor carrier 22. The movable plate 213 includes a square plate body 216, and wire fixing portions 213a, 213b, 213c, and 213d are respectively provided at two opposite corners of the square plate body 216. Starting from the middle of two opposite sides of the square plate body 216, flexible arms 215 and 217 are respectively extended. The flexible arms 215 and 217 basically follow the outer peripheral shape of the square plate body 216 and extend in the same rotation direction. They are bent 90 degrees from their starting side, bypass one corner of the square plate body 216, and then extend to the other corner and stop. That is, the flexible arm 215 has a starting end 215a and a free end 215b, and the starting end 215a is connected to the middle of one side of the square plate body 216. The flexible arm 217 has a starting end 217 a and a free end 217 b . The starting end 217 a is connected to the middle of one side of the square plate 217 .

[0040] The fixing portion 212 is roughly square in shape, and wire fixing portions 212a, 212b, 212c, and 212d are respectively provided at two opposite corners, and terminals 2121 extend from two opposite sides. The fixing portion 212 is fixed to the rear side of the bottom plate 210. The bottom plate 210 is also roughly square in shape. Figure 5 As shown, the bottom plate 210, the fixed part 212, and the movable plate 216 are arranged adjacent to each other in sequence in a manner that the four sides are basically aligned. The two corners of the fixed part 212 provided with the wire fixing parts 212a, 212b, 212c, and 212d and the two corners of the movable plate 213 provided with the wire fixing parts 213a, 213b, 213c, and 213d are respectively distributed at the ends of the intersecting diagonals. One end of the SMA wire 214a is fixed to the wire fixing part 212a, and the other end is fixed to the wire fixing part 213a. One end of the SMA wire 214b is fixed to the wire fixing part 212b, and the other end is fixed to the wire fixing part 213b. One end of the SMA wire 214c is fixed to the wire fixing part 212c, and the other end is fixed to the wire fixing part 213c. One end of the SMA wire 214d is fixed to the wire fixing part 212d, and the other end is fixed to the wire fixing part 213d.

[0041] The driving current is input from the terminal 2121 on one side of the fixed part 212 to make at least a part of the SMA wires expand and contract. When the SMA wires on the two parallel opposite sides are contracted or extended, the movable plate 216 together with the sensor carrier 22 thereon will be driven to move in a direction perpendicular to the optical axis direction. When the SMA wires on the non-intersecting sides are contracted or extended, the movable plate 216 together with the sensor carrier 22 thereon will be driven to rotate. Therefore, the controller not shown in the figure calculates the desired compensation movement based on the position signal of the lens carrier, and then inputs the corresponding driving current to different SMA wires to achieve jitter compensation. The specific control method can refer to the existing jitter compensation control algorithm. For example, the Chinese patent document "CN102262280A" previously published by the applicant, the movement perpendicular to the optical axis direction (anti-shake correction), based on the gyroscope component as a signal, the size of the anti-shake correction amount in the X direction and the Y direction perpendicular to the optical axis direction (Z direction), calculates the anti-shake correction amount in the X direction and the Y direction to determine the movement amount of the sensor carrier, and then energizes part or all of the SMA wires.

[0042] The front side surface of the bottom plate 210 is fixedly connected to the rear side surface of the support substrate 31 of the base 3 by bonding or other means. The hole 30 of the support substrate 31, the hole 2100 of the bottom plate 210, the hole 2120 of the fixing part 212, the hole 2130 of the movable plate 213 and the like Fig. 6A and Figure 6B The hole 222 of the lens carrier 22 shown in the figure is arranged coaxially to allow all the light transmitted by the lens 12 to pass therethrough and illuminate the image sensor 23.

[0043] like Fig. 6A and Figure 6BAs shown, the sensor carrier 22 is a roughly square plate body, including a front side surface 220, a carrier front bonding surface 221 protruding from the front side surface, and stop recesses 22a, 22b, 22c and 22d formed at the four corners of the front side surface 220. The sensor carrier 22 also includes a hole 222, which penetrates the sensor carrier 22 from the carrier front bonding surface 221 to the rear side to allow light to pass through. Notches 2201 are also formed on the opposite sides of the sensor carrier 22, and the notches 2201 are set as avoidance parts for the terminals 2121. Wire avoidance parts 2202 are also formed on the four sides of the front side surface 220 by reducing the thickness. The wire avoidance parts 2202 are convenient for arranging four SMA wires 214a, 214b, 214c, 214d, and provide activity space for the four SMA wires 214a, 214b, 214c, 214d. The rear surface of the sensor carrier 22 is a mounting surface for mounting the image sensor 23, and the mounting surface includes a first bonding surface 2201 formed on four sides thereof, and a second bonding surface 224 formed by being recessed toward the front side from the first bonding surface 2201. The image sensor 23 is bonded to the first bonding surface 2201 and the second bonding surface 224 respectively, and a positioning hole 225 is also provided at a corner of the second bonding surface 224.

[0044] like Figure 1 , Figure 2 , Fig. 7A and Figure 7B As shown, the image sensor 23 is connected to an external circuit (not shown) through a data connector 24. The data connector 24 is a flexible member, in which a signal line is built into a thin plastic sheet, and includes a first extension portion 241, a second extension portion 242 and a third extension portion 243. The second extension portion 242 connects the first extension portion 241 and the third extension portion 243. The second extension portion 242 is parallel to and separated from the second side 232 of the image sensor 23, and the third extension portion 243 is parallel to and separated from the third side 233 of the image sensor 23. The free end of the first extension portion 241 is connected to the first side 231 of the image sensor 23, and is separated from the first side 231 in a gradually expanding manner toward the connection end with the second extension portion 242. An external circuit connection portion 244 is provided on the side of the third extension portion 243 that faces away from the third side 233. The gap g between each extension portion 241, 242, 243 and the image sensor 23 provides an activity space for the image sensor 23, that is, a space for movement or rotation in a plane perpendicular to the optical axis direction.

[0045] In the aforementioned embodiment, the lens 12 is adjusted along the optical axis direction of the lens by the first driving unit for automatic focusing, and the second driving unit driven by the SMA wire adjusts the position of the image sensor 23 in a plane perpendicular to the optical axis direction to compensate for the jitter. The movements of automatic zoom and compensating for the jitter are independent, that is, the automatic zoom will not be affected by the movement of compensating for the jitter, or the movement of compensating for the jitter is only performed according to the jitter and will not be affected by the automatic zoom movement, so that the lens 12 can be quickly stabilized, the shooting quality is improved, and the user experience is enhanced.

[0046] In the aforementioned embodiment, the first drive unit and the second drive unit share a base, and there is no need to add an additional shell and a bottom plate. The length and width can be made thinner and the overall size is small. When applied to electronic devices such as mobile phones, the electronic devices can be made thinner. Therefore, the aforementioned embodiment can achieve a miniaturization effect.

[0047] In the aforementioned embodiment, when the sensor carrier is located at the rear side of the second driving unit, that is, the sensor carrier 22 is at the rear side of the cavity portion 300 of the base 3, the rear side of the surrounding side wall 32 encloses an opening of the cavity portion 300, and the sensor carrier 22 is exposed at the opening, that is, the mounting surfaces 223 and 224 of the sensor carrier 22 are configured as interfaces of the image sensor, so that the configuration of the image sensor is more flexible, that is, different implementation entities can configure different image sensors according to the specific settings of the product, which expands the use occasions of the driving device and also makes the driving device more marketable.

[0048] In the aforementioned embodiment, the data connector 24 is arranged around the three sides of the image sensor 23, and provides a movable space for the image sensor 23, and connects the image sensor 23 with an external circuit not shown in the figure. This arrangement allows the image sensor 23 to be driven by the second driving unit 2 and move in a vertical plane in the direction of the optical axis, and there is a buffer length between the connection between the first extension portion 241 of the data connector 24 and the image sensor 23 and the external circuit connection portion 244 of the third extension portion 243 of the data connector 24. The buffer length allows the data connector 24 to be deformed by twisting, twisting, etc., but will not generate excessive torque at the connection, forcing the data connector 241 to be disconnected from the image sensor 23, thereby improving the quality of the product.

[0049] Fig.10The second embodiment of the driving device is shown. Different from the first embodiment, the sensor carrier 22 is arranged at the front side of the second driving device 21', between the supporting base plate 31 of the base 3 and the second driving device 21'. The bottom plate of the second driving device 21' is connected to the surrounding side wall 32 of the base 3. The rear side of the sensor carrier 22 is connected to the movable plate of the second driving mechanism 21', and the image sensor 23 is correspondingly arranged at the front side of the sensor carrier 22'. Fig.10 The sensor carrier 22' shown in FIG. Fig. 6A , Figure 6B The structure shown, but with the front and rear sides reversed. Fig.10 The second drive mechanism 21' shown in FIG. Figure 4A , Figure 4B as well as Figure 5 The structure shown in FIG. 1 is different from that shown in FIG. 1 , but the front and rear sides are opposite, that is, the movable plate is located at the front side of the second driving head 21 ′, and the bottom plate is located at the rear side of the second driving mechanism 21 ′.

[0050] Although the present invention is disclosed as above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art may make possible changes and modifications without departing from the spirit and scope of the present invention. For example, in some embodiments, the sensor carrier is omitted or integrated with the movable plate of the second driving mechanism, and the image sensor is directly combined with the movable plate. For another example, in some embodiments, the fixed plate of the second driving mechanism is integrated with the supporting substrate of the base.

[0051] Therefore, any modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention shall fall within the protection scope defined by the claims of the present invention.

Claims

1. Driving device, including: The first driving unit comprises: lens; A first driving mechanism drives the lens in the direction of the optical axis of the lens; It is characterized in that The driving device also includes: Anti-shake drive unit, including: An image sensor generates an image signal based on the light transmitted by the lens; A sensor carrier, used for carrying an image sensor; a second driving mechanism, driving the sensor carrier in a direction perpendicular to the optical axis direction; and The data connector is a flexible member extending in a ribbon shape and used to connect the image sensor and the external circuit to transmit the image signal; A base, the first driving unit is arranged on the front side in the optical axis direction of the base, and the anti-shake driving unit is arranged on the rear side in the optical axis direction of the base; The image sensor is square, the data connector comprises a first extension portion, a second extension portion and a third extension portion, the second extension portion connects the first extension portion and the third extension portion; The free end of the first extension portion is connected to the first side of the image sensor and is separated from the first side in a gradually expanding manner toward the connection end with the second extension portion; The second extension portion is parallel to and separated from the second side of the image sensor, and the third extension portion is parallel to and separated from the third side of the image sensor; An external circuit connection portion is provided on a side of the third extension portion facing away from the third side; A gap between the data connector and the image sensor provides an active space for the image sensor.

2. The driving device according to claim 1, characterized in that: The second driving mechanism includes a plurality of SMA wires, a movable plate and a fixed plate. The SMA wires connect the movable plate and the fixed plate and change their length according to an input driving signal to drive the movable plate to move relative to the fixed plate. The sensor carrier is configured to follow the movement of the movable plate.

3. The driving device according to claim 2, characterized in that: The sensor carrier is disposed at the rearmost side in the optical axis direction of the second driving mechanism, and the image sensor is connected to the rear side surface of the sensor carrier in the optical axis direction.

4. The driving device according to claim 1, characterized in that: The base includes a supporting substrate, and a surrounding side wall extends from the rear side of the supporting substrate in the direction of the optical axis in parallel with the optical axis, and a cavity is surrounded by the surrounding side wall; the anti-shake drive unit is accommodated in the cavity.

5. A photographic device, characterized in that: The invention comprises a lens, an image sensor, and a driving device according to any one of claims 1 to 4 for driving the lens to generate an image signal on the image sensor.

6. An electronic device, characterized in that: Comprising the photographic device as claimed in claim 5.

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