Driving device, camera module, electronic device and driving method of driving device

Abstract

A driving device, a camera module, an electronic device and a driving method for the driving device, the driving device includes a base, a carrier and a driving member, the carrier is arranged on the base, and can be driven by the driving member to move up and down relative to the base, the base includes a main body and a conductive member, the conductive member is provided with a pin terminal, the conductive member is arranged in the main body, the driving member includes a second driving member and a third driving member, the pin terminal includes a first terminal, a second terminal and a third terminal, the two ends of the second driving member are electrically connected to the first terminal and the third terminal respectively, and the two ends of the third driving member are electrically connected to the first terminal and the second terminal respectively. In the driving device, camera module, electronic device and driving method of the driving device of the present invention, the terminal (i.e., the first terminal) for outputting current of all driving members driving upward and downward is shared, which can reduce the number of pin terminals, thereby simplifying the driving method and reducing the difficulty of molding the base.

Description

Technical Field

[0001] The present invention relates to the field of imaging technology, and in particular to a driving device, a camera module, an electronic device and a driving method of the driving device. Background Art

[0002] With the advancement of science and technology, the application of camera modules is becoming more and more extensive. At present, in addition to cameras, mobile phones, computers and other electronic products are equipped with camera modules to facilitate people to take pictures anytime and anywhere, bringing convenience and fun to people's lives. The camera module needs to focus during use to obtain clear images. At present, in the camera module, the lens is usually driven by a driving device to achieve automatic focus.

[0003] A driving device includes a base, a carrier and a memory alloy (SMA) component. The carrier is movably arranged on the base, the two ends of the memory alloy component are fixed on the base, and the middle part is hung on the carrier. When the memory alloy component is powered on, its length will shorten, thereby pulling the carrier to move up and down. The carrier can drive the lens installed on the carrier to move up and down to achieve focusing. Figure 1 As shown, there are four memory alloy components, two of which are used to drive the carrier to move upward, and two of which are used to drive the carrier to move downward. Both ends of each memory alloy component are electrically connected to a metal buckle 100 on a base, and each metal buckle 100 is electrically connected to a pin 101. The memory alloy component is energized by energizing the pin 101. In this driving device, four memory alloy components require eight pins 101 and eight metal buckles 100. Too many pins 101 and metal buckles 100 will make the driving method complicated and the base molding difficult.

[0004] The preceding description is intended to provide general background information and does not necessarily constitute prior art. Summary of the invention

[0005] The object of the present invention is to provide a driving device, a camera module, an electronic device and a driving method for the driving device, which can reduce the number of pin terminals, thereby simplifying the driving method and reducing the difficulty of molding the base.

[0006] The present invention provides a driving device, including a base, a carrier and a driving member, wherein the carrier is arranged on the base and can be driven by the driving member to move up and down relative to the base, the base includes a main body and a conductive member, the conductive member is provided with a pin terminal, the conductive member is arranged in the main body, the driving member includes a second driving member and a third driving member, the pin terminal includes a first terminal, a second terminal and a third terminal, two ends of the second driving member are electrically connected to the first terminal and the third terminal respectively, and two ends of the third driving member are electrically connected to the first terminal and the second terminal respectively.

[0007] In one embodiment, the driving element is a memory alloy wire.

[0008] In one embodiment, the first terminal is used to connect a low level, and the second terminal and the third terminal are used to connect a high level.

[0009] In one embodiment, the driving member further includes a first driving member and a fourth driving member, the pin terminal further includes a fourth terminal, two ends of the first driving member are electrically connected to the third terminal and the fourth terminal respectively, and two ends of the fourth driving member are electrically connected to the second terminal and the fourth terminal respectively.

[0010] In one embodiment, the conductive member also includes a first conductive member, a second conductive member, a third conductive member and a fourth conductive member, the first terminal, the second terminal, the third terminal and the fourth terminal are respectively arranged on the first conductive member, the second conductive member, the third conductive member and the fourth conductive member, the base also includes a clamping terminal, the clamping terminal includes a first clamping terminal, a second clamping terminal, a third clamping terminal, a fourth clamping terminal, a fifth clamping terminal, a sixth clamping terminal, a seventh clamping terminal and an eighth clamping terminal, the first conductive member is electrically connected to the first clamping terminal and the second clamping terminal, the second conductive member is electrically connected to the third clamping terminal and the fifth clamping terminal, the third conductive member is electrically connected to the fourth clamping terminal and the sixth clamping terminal, and the fourth terminal is electrically connected to the seventh clamping terminal and the eighth clamping terminal.

[0011] In one embodiment, the first terminal and the fourth terminal are used to connect to a low level, and the second terminal and the third terminal are used to connect to a high level.

[0012] The present invention also provides a camera module, comprising the above-mentioned driving device.

[0013] The present invention also provides an electronic device, comprising the camera module.

[0014] The present invention also provides a driving method for the driving device, when the carrier needs to move in a first direction, a low level is applied to the first terminal and a high level is applied to the third terminal; when the carrier needs to move in a second direction opposite to the first direction, a low level is applied to the first terminal and a high level is applied to the second terminal.

[0015] The present invention also provides a driving method for the driving device, when the carrier needs to move in a first direction, a low level is applied to the first terminal and the fourth terminal, and a high level is applied to the third terminal; when the carrier needs to move in a second direction opposite to the first direction, a low level is applied to the first terminal and the fourth terminal, and a high level is applied to the second terminal.

[0016] In the driving device, camera module, electronic device and driving method of the driving device of the present invention, a terminal (i.e., the first terminal) for outputting current of all driving components driving upward and downward is shared, which can reduce the number of pin terminals, thereby simplifying the driving method and reducing the difficulty of molding the base. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The present invention is a schematic diagram of a base structure of a driving device.

[0018] Figure 2 It is a schematic diagram of the partial assembly structure of the driving device of the first embodiment of the present invention.

[0019] Figure 3 for Figure 2 A perspective exploded view of the drive device shown.

[0020] Figure 4 for Figure 2 A simplified schematic diagram of the drive device shown.

[0021] Figure 5 for Figure 2 Schematic diagram of current flow when the carrier of the driving device moves downward.

[0022] Figure 6 for Figure 2 Schematic diagram of current flow when the carrier of the driving device moves upward.

[0023] Figure 7 FIG. 1 is a simplified structural diagram of a driving device according to a second embodiment of the present invention. DETAILED DESCRIPTION

[0024] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0025] First embodiment

[0026] Please refer to Figure 2 and Figure 3, a driving device provided in one embodiment of the present invention comprises a base 11, a carrier (not shown), a driving member (not shown), a lower spring (not shown), an upper spring (not shown) and a shell (not shown). The carrier is arranged on the base 11, and can move up and down relative to the base 11. The two ends of the driving member are respectively fixed relative to the base 11, and the part between the two ends of the driving member is connected to the carrier, and the driving member can be retracted to drive the carrier to move up and down relative to the base 11. The lower spring is elastically arranged between the base 11 and the carrier, and the upper spring is elastically arranged between the carrier and the shell. The shell is arranged on the carrier, and the base 11, the carrier, the driving member, the lower spring and the upper spring are covered in the shell. Specifically, the shell is also fixedly connected to the base 11.

[0027] In this embodiment, the base 11 includes a main body 112, a conductive part and a wire clamping terminal. The conductive part is provided with a pin terminal. The conductive part and the wire clamping terminal are made of conductive material. The conductive part and the wire clamping terminal can be embedded in the main body 112 by insert molding to form the base 11. The main body 112 can be made of plastic material and can be injection molded.

[0028] The conductive member includes a first conductive member 114, a second conductive member 115, a third conductive member 116, and a fourth conductive member 117. The pin terminal includes a first terminal 152, a second terminal 154, a third terminal 156, and a fourth terminal 158. The first terminal 152, the second terminal 154, the third terminal 156, and the fourth terminal 158 are arranged at intervals from each other, and the first terminal 152, the second terminal 154, the third terminal 156, and the fourth terminal 158 are respectively arranged on the first conductive member 114, the second conductive member 115, the third conductive member 116, and the fourth conductive member 117. Specifically, the first terminal 152, the second terminal 154, the third terminal 156, and the fourth terminal 158 extend out of the bottom end of the base 11 to be electrically connected to an external circuit.

[0029] The clamping terminal includes a first clamping terminal 172, a second clamping terminal 174, a third clamping terminal 176, a fourth clamping terminal 178, a fifth clamping terminal 180, a sixth clamping terminal 182, a seventh clamping terminal 184 and an eighth clamping terminal 186. The first conductive member 114 is electrically connected to the first clamping terminal 172 and the second clamping terminal 174, so that the first terminal 152 is electrically connected to the first clamping terminal 172 and the second clamping terminal 174. The second conductive member 115 is electrically connected to the third clamping terminal 176 and the fifth clamping terminal 180, so that the second terminal 154 is electrically connected to the third clamping terminal 176 and the fifth clamping terminal 180. The third conductive member 116 is electrically connected to the fourth clamping terminal 178 and the sixth clamping terminal 182, so that the third terminal 156 is electrically connected to the fourth clamping terminal 178 and the sixth clamping terminal 182. The fourth terminal 117 is electrically connected to the seventh clamping terminal 184 and the eighth clamping terminal 186 , so that the fourth terminal 117 is electrically conductive with the seventh clamping terminal 184 and the eighth clamping terminal 186 .

[0030] In this embodiment, the driving member includes a first driving member 132, a second driving member 134, a third driving member 136 and a fourth driving member 138. The two ends of the first driving member 132 are respectively connected to the fifth clamping terminal 180 and the seventh clamping terminal 184. The two ends of the second driving member 134 are respectively connected to the first clamping terminal 172 and the sixth clamping terminal 182. The two ends of the third driving member 136 are respectively connected to the second clamping terminal 174 and the third clamping terminal 176. The two ends of the fourth driving member 138 are respectively connected to the fourth clamping terminal 178 and the eighth clamping terminal 186. Among them, the first driving member 132 and the second driving member 134 are used to drive the carrier to move in a first direction (for example, upward), and the third driving member 136 and the fourth driving member 138 are used to drive the carrier to move in a second direction (for example, downward) opposite to the first direction, thereby driving the carrier to move up and down, and then driving the lens mounted on the carrier to move up and down to achieve focusing. The first driving member 132 , the second driving member 134 , the third driving member 136 and the fourth driving member 138 are all memory alloy wires.

[0031] Please refer to Figure 4 , which is a simplified diagram of the connection relationship between the first driving member 132 , the second driving member 134 , the third driving member 136 and the fourth driving member 138 and the first terminal 152 , the second terminal 154 , the third terminal 156 and the fourth terminal 158 .

[0032] like Figure 5As shown, when the carrier needs to move downward, a low level is applied to the first terminal 152 and the fourth terminal 158, and a high level is applied to the second terminal 154. Current flows in from the second terminal 154, flows to the third clamping terminal 176 and the fourth clamping terminal 178 respectively through the second conductive member 115, and then flows through the third drive member 136 and the fourth drive member 138 respectively, and finally flows out from the first terminal 152 and the fourth terminal 158 respectively through the second clamping terminal 174 and the eighth clamping terminal 186, thereby energizing the third drive member 136 and the fourth drive member 138. The third drive member 136 and the fourth drive member 138 will shrink when energized, and the third drive member 136 and the fourth drive member 138 hung on the carrier will shrink to drive the carrier to move downward.

[0033] like Figure 6 As shown, when the carrier needs to move upward, a low level is applied to the first terminal 152 and the fourth terminal 158, and a high level is applied to the third terminal 156. Current flows in from the third terminal 156, flows to the fifth clamping terminal 180 and the sixth clamping terminal 182 respectively through the third conductive member 116, and then flows through the first drive member 132 and the second drive member 134 respectively, and finally flows out from the fourth terminal 158 and the first terminal 152 respectively through the seventh clamping terminal 184 and the first clamping terminal 172, thereby energizing the first drive member 132 and the second drive member 134. The first drive member 132 and the second drive member 134 will shrink when energized, and the first drive member 132 and the second drive member 134 hung on the carrier will shrink to drive the carrier to move upward.

[0034] In the present driving device, a terminal for inputting current for driving two driving members upward (i.e., the second terminal 154) is shared, a terminal for inputting current for driving two driving members downward (i.e., the third terminal 156) is shared, and a terminal for outputting current for all driving members driven upward and downward (i.e., the first terminal 152 and the fourth terminal 158) is shared, which can greatly reduce the number of pin terminals, thereby simplifying the driving method and reducing the difficulty of molding the base.

[0035] Second embodiment

[0036] The second embodiment of the present invention is similar in structure to the first embodiment, except that the driving device of the second embodiment only includes one driving member for driving upward and one driving member for driving downward, that is, in this embodiment, the driving member includes a second driving member 134 and a third driving member 136, which drive the carrier to move upward and downward respectively, and the pin terminal includes a first terminal 152, a second terminal 154 and a third terminal 156. Figure 7 As shown, two ends of the second driving member 134 are electrically connected to the first terminal 152 and the second terminal 154 , respectively, and two ends of the third driving member 136 are electrically connected to the first terminal 152 and the third terminal 156 , respectively.

[0037] When the carrier needs to move upward, a low level is applied to the first terminal 152 and a high level is applied to the third terminal 156. Current flows into the third terminal 154, flows out from the first terminal 152 after passing through the second driving member 134, and thus the second driving member 134 is energized. When energized, the second driving member 134 will shrink. The second driving member 134 hung on the carrier will shrink and drive the carrier to move upward.

[0038] When the carrier needs to move downward, a low level is applied to the first terminal 152 and a high level is applied to the second terminal 154. Current flows into the second terminal 154 and flows out from the first terminal 152 after passing through the third driving member 136, thereby energizing the third driving member 136. The third driving member 136 will shrink when energized, and the third driving member 136 hung on the carrier will shrink to drive the carrier to move downward.

[0039] In the driving device, the terminal (ie, the first terminal 152) for outputting current for all driving members driving upward and downward is shared, which can also reduce the number of pin terminals, thereby simplifying the driving method and reducing the difficulty of molding the base.

[0040] The present invention also provides a camera module, comprising any one of the above-mentioned driving devices.

[0041] The present invention also provides an electronic device, comprising the camera module.

[0042] Third embodiment

[0043] The present invention further provides a driving method for a driving device, which is used to drive the driving device of the first embodiment. The driving method for the driving device comprises the following steps:

[0044] When the carrier needs to move in the first direction, a low level is applied to the first terminal 152 and the fourth terminal 158, and a high level is applied to the third terminal 156. At this time, current flows in from the third terminal 156, flows to the third clamping terminal 176 and the fourth clamping terminal 178 respectively through the third conductive member 116, and then flows through the first driving member 132 and the second driving member 134 respectively, and finally flows out from the fourth terminal 158 and the first terminal 152 respectively through the first clamping terminal 172 and the fifth clamping terminal 180, thereby energizing the first driving member 132 and the second driving member 134. When energized, the first driving member 132 and the second driving member 134 will shrink, and the first driving member 132 and the second driving member 134 hung on the carrier will shrink to drive the carrier to move upward. The electric current flows to the fifth clamping terminal 180 and the sixth clamping terminal 182 through the third conductive member 116, and then flows through the first drive member 132 and the second drive member 134, and finally flows out from the fourth terminal 158 and the first terminal 152 through the seventh clamping terminal 184 and the first clamping terminal 172, thereby energizing the first drive member 132 and the second drive member 134. The first drive member 132 and the second drive member 134 will shrink when energized, and the first drive member 132 and the second drive member 134 hung on the carrier will shrink to drive the carrier to move upward.

[0045] The driving method of the driving device also includes:

[0046] When the carrier needs to move in a second direction opposite to the first direction, a low level is applied to the first terminal 152 and the fourth terminal 158, and a high level is applied to the second terminal 154. At this time, the current flows in from the second terminal 154, flows to the third clamping terminal 176 and the fourth clamping terminal 178 respectively through the second conductive member 115, and then flows through the third driving member 136 and the fourth driving member 138 respectively, and finally flows out from the first terminal 152 and the fourth terminal 158 through the second clamping terminal 174 and the eighth clamping terminal 186 respectively, so that the third driving member 136 and the fourth driving member 138 are energized, and the third driving member 136 and the fourth driving member 138 will shrink when energized, and the third driving member 136 and the fourth driving member 138 hung on the carrier will shrink to drive the carrier to move downward.

[0047] Fourth embodiment

[0048] The present invention further provides a driving method for a driving device, which is used to drive the driving device of the first embodiment. The driving method for the driving device comprises the following steps:

[0049] When the carrier needs to move in the first direction, a low level is applied to the first terminal 152, and a high level is applied to the second terminal 154. At this time, current flows in from the second terminal 154, flows out from the first terminal 152 after passing through the second driving member 134, thereby energizing the second driving member 134, which will shrink when energized, and the second driving member 134 hung on the carrier will shrink to drive the carrier to move upward.

[0050] The driving method of the driving device also includes:

[0051] When the carrier needs to move in a second direction opposite to the first direction, a low level is applied to the first terminal 152, and a high level is applied to the third terminal 156. At this time, current flows in from the third terminal 156, flows out from the first terminal 152 after passing through the third driving member 136, thereby energizing the third driving member 136, which will shrink when energized, and the third driving member 136 hung on the carrier will shrink to drive the carrier to move downward.

[0052] In the accompanying drawings, the sizes and relative sizes of layers and regions are exaggerated for clarity. It should be understood that when an element, such as a layer, region, or substrate, is referred to as being "formed on," "disposed on," or "located on" another element, the element may be disposed directly on the other element, or there may be intervening elements. Conversely, when an element is referred to as being "formed directly on" or "disposed directly on" another element, there are no intervening elements.

[0053] In this document, unless otherwise specified or limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0054] In this document, the directions or positional relationships indicated by terms such as "up", "down", "front", "back", "left", "right", "top", "bottom", "inside", "outside", "vertical", and "horizontal" are based on the directions or positional relationships shown in the accompanying drawings and are only for the clarity of expressing the technical solutions and the convenience of description, and therefore should not be understood as limitations of the present invention.

[0055] In this document, the ordinal adjectives “first”, “second”, etc. used to describe elements are only used to distinguish elements with similar attributes, and do not mean that the elements described in this way must follow a given order, or time, space, level or other limitations.

[0056] As used herein, unless otherwise specified, “plurality” or “several” means two or more.

[0057] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0058] In this document, the terms "comprises," "comprising," or any other variations thereof, are intended to cover a non-exclusive inclusion of elements other than those listed and may also include additional elements not expressly listed.

[0059] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A driving device, comprising a base (11), a carrier and a driving member, wherein the carrier is arranged on the base (11) and can be driven by the driving member to move up and down relative to the base (11), characterized in that: The base (11) comprises a main body (112) and a conductive member, the conductive member is provided with a pin terminal, the conductive member is arranged in the main body (112), the driving member comprises a second driving member (134) and a third driving member (136), the pin terminal comprises a first terminal (152), a second terminal (154) and a third terminal (156), two ends of the second driving member (134) are electrically connected to the first terminal (152) and the third terminal (156), and two ends of the third driving member (136) are electrically connected to the first terminal (152) and the second terminal (154).

2. The driving device according to claim 1, characterized in that: The driving member is a memory alloy wire.

3. The driving device according to claim 1, characterized in that: The first terminal (152) is used to connect a low level, and the second terminal (154) and the third terminal (156) are used to connect a high level.

4. The driving device according to claim 1, characterized in that: The driving member also includes a first driving member (132) and a fourth driving member (138), and the pin terminal also includes a fourth terminal (158). The two ends of the first driving member (132) are respectively electrically connected to the third terminal (156) and the fourth terminal (158), and the two ends of the fourth driving member (138) are respectively electrically connected to the second terminal (154) and the fourth terminal (158).

5. The driving device according to claim 4, characterized in that: The conductive member further comprises a first conductive member (114), a second conductive member (115), a third conductive member (116) and a fourth conductive member (117); the first terminal (152), the second terminal (154), the third terminal (156) and the fourth terminal (158) are respectively arranged on the first conductive member (114), the second conductive member (115), the third conductive member (116) and the fourth conductive member (117); the base (11) further comprises a clamping terminal, the clamping terminal comprises a first clamping terminal (172), a second clamping terminal (174), a third clamping terminal (176), a fourth clamping terminal (178), The fifth clamp terminal (180), the sixth clamp terminal (182), the seventh clamp terminal (184) and the eighth clamp terminal (186), the first conductive member (114) is electrically connected to the first clamp terminal (172) and the second clamp terminal (174), the second conductive member (115) is electrically connected to the third clamp terminal (176) and the fifth clamp terminal (180), the third conductive member (116) is electrically connected to the fourth clamp terminal (178) and the sixth clamp terminal (182), and the fourth conductive member (117) is electrically connected to the seventh clamp terminal (184) and the eighth clamp terminal (186).

6. The driving device according to claim 4 or 5, characterized in that: The first terminal (152) and the fourth terminal (158) are used to connect a low level, and the second terminal (154) and the third terminal (156) are used to connect a high level.

7. A camera module, characterized in that: Comprising a driving device as described in any one of claims 1-6.

8. An electronic device, characterized in that: Comprising the camera module as claimed in claim 7.

9. A method for driving a driving device for driving the driving device according to claim 1, characterized in that: When the carrier needs to move in a first direction, a low level is applied to the first terminal (152) and a high level is applied to the third terminal (156); when the carrier needs to move in a second direction opposite to the first direction, a low level is applied to the first terminal (152) and a high level is applied to the second terminal (154).

10. A method for driving a driving device according to claim 4 or 5, characterized in that: When the carrier needs to move in a first direction, a low level is applied to the first terminal (152) and the fourth terminal (158), and a high level is applied to the third terminal (154); when the carrier needs to move in a second direction opposite to the first direction, a low level is applied to the first terminal (152) and the fourth terminal (158), and a high level is applied to the second terminal (154).

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