CN112782824A - Lens module control system and control method thereof - Google Patents
Lens module control system and control method thereof Download PDFInfo
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- CN112782824A CN112782824A CN202010266703.4A CN202010266703A CN112782824A CN 112782824 A CN112782824 A CN 112782824A CN 202010266703 A CN202010266703 A CN 202010266703A CN 112782824 A CN112782824 A CN 112782824A
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- Prior art keywords
- lens module
- controlling
- brake mechanism
- position information
- lens
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
- G02B7/09—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification adapted for automatic focusing or varying magnification
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B13/00—Viewfinders; Focusing aids for cameras; Means for focusing for cameras; Autofocus systems for cameras
- G03B13/32—Means for focusing
- G03B13/34—Power focusing
- G03B13/36—Autofocus systems
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B5/00—Adjustment of optical system relative to image or object surface other than for focusing
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- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Adjustment Of Camera Lenses (AREA)
- Studio Devices (AREA)
- Lens Barrels (AREA)
Abstract
The present disclosure relates to a lens module control system and a control method thereof, wherein the lens module includes a lens module, a base for mounting the lens module, and a brake mechanism fixed on the base and capable of holding the lens module, the method including: acquiring position information of a lens module; controlling the brake mechanism to be electrified so as to release the lens module; controlling the action of the lens module according to the position information; when the lens module reaches the target position, the control brake mechanism is powered off to hold the lens module. When the anti-shake or focusing function is not used, the braking mechanism can quickly stop the lens module after the braking mechanism is powered off, so that the system is quick and stable, and abnormal sound caused by shaking or collision of equipment is avoided. When shooting state, arrestment mechanism can keep lens module position, need not to continue circular telegram and keeps lens module position, avoids the temperature rise of lens module and leads to stability to reduce.
Description
Technical Field
The present disclosure relates to the field of optical technologies, and in particular, to a lens module control system and a control method thereof.
Background
In recent years, with the demands of users, various technologies of shooting equipment are rapidly developed, and the application of the shooting equipment is not limited to cameras, for example, the shooting equipment can be widely applied to cameras and projection equipment of mobile phones, or can be applied to unmanned aerial vehicles for aerial photography or distance measurement and the like. In order to meet the application requirements in various fields, an optical anti-shake technology and an automatic focusing technology are often added to shooting equipment. The optical anti-shake technology can control the lens to move relative to the image sensor, so that image deviation caused by hand shake or external action is counteracted, and the imaging stability of the equipment in a shake environment is guaranteed. The automatic focusing technology can move the lens along the optical axis direction to make the shot object image clearest. In both of these techniques, the lens moves to different degrees, and when the movement stops, a driving system needs to be used to apply a driving force in the opposite direction to the lens, so as to stop the lens movement as soon as possible, and when shooting is performed without an anti-shake or focusing function, the lens still needs to be powered on continuously to keep stable, so that the temperature of the optical system rises, and as the temperature rises, the stability of the system is worse, which affects the imaging effect.
Disclosure of Invention
The present disclosure provides a lens module control system and a control method thereof to improve the performance of the lens module.
In order to achieve the above object, the present disclosure provides a lens module control method, the lens module including a lens module, a base for mounting the lens module, and a stopper mechanism fixed to the base and capable of holding the lens module, the method including: acquiring position information of a lens module; controlling the brake mechanism to be electrified so as to release the lens module; controlling the lens module to act according to the position information; controlling the brake mechanism to be de-energized to hold the lens module when the lens module reaches a target position.
Optionally, before the lens module reaches the target position, the current through the braking mechanism is reduced as the lens module approaches the target position, such that the braking mechanism contacts the lens module.
Optionally, the braking mechanism includes a friction portion for contacting with the lens module, when the lens module approaches the target position, the current passing through the braking mechanism is reduced to make the friction portion form a first pressure on the lens module, and when the lens module reaches the target position, the braking mechanism is controlled to be powered off to make the friction portion form a second pressure on the lens module, which is greater than the first pressure.
The brake mechanism includes an actuating portion mounted on the base and a holding portion for holding the lens module and interlocking with the actuating portion, and the step of controlling the brake mechanism to be energized to release the lens module includes: controlling the action part to be electrified so as to drive the holding part to release the lens module; the step of controlling the brake mechanism to be de-energized to clamp the lens module comprises: and controlling the action part to be powered off so as to enable the holding part to return to hold the lens module.
Optionally, the actuating portion is made of a bimetal, the holding portion is connected to the bimetal, an active layer of the bimetal is disposed at a side close to the lens module, a passive layer of the bimetal is disposed at a side far from the lens module, and the step of controlling the actuating mechanism to be energized to release the lens module includes: controlling the bimetallic strip to be electrified so that the bimetallic strip drives the holding part to deflect to one side of the passive layer; the step of controlling the brake mechanism to be de-energized to clamp the lens module comprises: and controlling the bimetallic strip to be powered off, wherein the bimetallic strip enables the holding part to return to one side of the active layer.
Optionally, the actuating part includes an SMA wire provided at one end of the holding part, the SMA wire having a high-temperature phase shape that is stretched or contracted at a high temperature and a low-temperature phase shape that is opposite to the high-temperature phase shape at a low temperature, and the step of controlling the brake mechanism to be energized to release the lens module includes: controlling the SMA wire to be electrified so as to drive the holding part to deflect towards one side far away from the lens module through the high-temperature phase shape of the SMA wire; the step of controlling the brake mechanism to be de-energized to hold the lens module comprises: and controlling the SMA wire to be powered off so as to enable the holding part to return to one side close to the lens module through the low-temperature phase shape of the SMA wire.
Optionally, a position sensor is disposed on the base, and the step of acquiring the position information of the lens module includes: acquiring position information of the lens module through the position sensor, wherein the control method comprises the following steps: and judging whether the position of the lens module is different from a target position or not according to the position information of the lens module acquired by the position sensor.
Optionally, the lens module includes a lens, a carrier for mounting the lens, and an electromagnetic driving mechanism for driving the carrier to move, and the step of acquiring the position information of the lens module includes: acquiring position information of the carrier; the step of controlling the lens module to reach the target position according to the position information comprises: and controlling the electromagnetic driving mechanism to be electrified according to the position information so as to drive the carrier to reach a target position.
According to a second aspect of the present disclosure, there is also provided a lens module control system, the lens module including a lens module, a base for mounting the lens module, and an actuator mechanism fixed to the base and capable of holding the lens module, the actuator mechanism including a release position for releasing the lens module when powered on and a hold position for holding the lens module when powered off, the control system comprising: a receiving module configured to acquire position information of the lens module; a first control module configured to control the brake mechanism to be powered on or off after acquiring the position information of the lens module; and a second control module configured to control the lens module to act according to the position information.
Optionally, a position sensor is disposed on the base, and the control system further includes: and the detection module is connected with the receiving module and is used for detecting the position of the lens module.
Through the technical scheme, the braking mechanism which is released after the lens module is electrified and is kept after power failure is designed, and when the anti-shake or focusing function is not used, the braking mechanism can quickly stop the lens module after the braking mechanism is powered off, so that the system is quick and stable. When shooting state, arrestment mechanism can keep lens module position unchangeable, need not to continue circular telegram and keeps lens module position, avoids the temperature rise of lens module and leads to stability to reduce. In addition, under the condition that does not use equipment, arrestment mechanism keeps the lens module all the time under the outage state, avoids equipment to rock or the striking and produces abnormal sound, influence user experience, also can guarantee the performance of lens module, extension equipment life cycle.
Additional features and advantages of the disclosure will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:
fig. 1 is a flowchart of a lens module control method according to an exemplary embodiment of the present disclosure;
fig. 2 is a flowchart of a lens module control method according to another exemplary embodiment of the present disclosure;
FIG. 3 is a block diagram of a lens module control system provided in an exemplary embodiment of the present disclosure;
FIG. 4 is a block diagram of a lens module control system provided in another exemplary embodiment of the present disclosure;
FIG. 5 is a schematic structural diagram of a lens module according to an exemplary embodiment of the present disclosure;
FIG. 6 is an enlarged view of a portion of FIG. 5;
FIG. 7 is a schematic structural diagram of a lens module according to another exemplary embodiment of the present disclosure;
fig. 8 is a partial enlarged view of B in fig. 7;
fig. 9 is a schematic structural diagram of a lens module according to another exemplary embodiment of the present disclosure;
FIG. 10 is an enlarged view of a portion C of FIG. 9;
FIG. 11 is a schematic diagram of the movement of a braking mechanism provided by an exemplary embodiment of the present disclosure;
fig. 12 is a schematic structural diagram of a lens module according to another exemplary embodiment of the present disclosure;
FIG. 13 is a schematic illustration of the movement of a braking mechanism provided by another exemplary embodiment of the present disclosure;
FIG. 14 is a schematic illustration of the movement of a braking mechanism provided by another exemplary embodiment of the present disclosure;
FIG. 15 is a schematic illustration of the movement of a braking mechanism provided by another exemplary embodiment of the present disclosure;
FIG. 16 is a schematic view of a lens module provided in another exemplary embodiment of the present disclosure;
fig. 17 is a partial enlarged view of D in fig. 16;
fig. 18 is a schematic diagram of the movement of a braking mechanism provided by another exemplary embodiment of the present disclosure.
Description of the reference numerals
1 base 11, second mounting block 12 and third mounting block
2 braking mechanism 21 friction part 22 bimetallic strip
23 terminal 24 holder 241 connection plate
321 first mounting block 4 Hall magnet 5 integrated circuit
6 circuit board 2011 detection module 201 receiving module
202 first control module 203 second control module
Detailed Description
The following detailed description of specific embodiments of the present disclosure is provided in connection with the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.
In the present disclosure, the use of directional terms such as "inner and outer" is intended with respect to the proper contours of the respective parts, unless otherwise specified. In addition, the terms "first, second, and the like" used in the embodiments of the present disclosure are for distinguishing one element from another, and have no order or importance. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated.
The present disclosure provides a lens module control method, wherein, referring to fig. 5, 7 and 9, a lens module includes a lens module, a base 1 for mounting the lens module, and a brake mechanism 2 fixed on the base 1 and capable of holding the lens module, fig. 1 is a flowchart of the lens module control method provided in an exemplary embodiment of the present disclosure, and the method includes the following steps: in step s101, position information of the lens module is acquired; here, the position information of the lens module may include position information of a handheld device or an external motion influence that causes the lens module to shake, and may also include position information that is out of focus when the device is shooting.
In step s102, the brake mechanism 2 is controlled to be energized to release the lens module; in this step, the brake mechanism 2 can hold the lens module in a non-energized state to hold the lens module fixed, and after the above-mentioned positional information of the lens module is acquired, the brake mechanism 2 is energized to release the lens module from the brake mechanism 2.
Then, after the brake mechanism 2 releases the lens module, in step s103, the lens module is controlled to operate according to the position information; in this step, the lens module performs an anti-shake or focusing operation according to the position information.
Finally, at step s104, when the lens module reaches the target position, the control brake mechanism 2 is deenergized to hold the lens module. In this step, the target position refers to a position where the lens module can perform photographing after the lens module has compensated for shake or completed focusing, and at this time, the braking mechanism 2 may hold the lens module again so that the lens module is held at the target position for photographing. In the control process, the system continuously acquires the position information of the lens module all the time until the acquired position information is consistent with the set target position, the lens module stops acting, and the braking mechanism is powered off to keep the lens module.
Through the technical scheme, the brake mechanism 2 which is released after the lens module is electrified and is kept after power failure is designed, and when the anti-shake or focusing function is not used, the brake mechanism 2 can quickly stop the lens module after the brake mechanism 2 is powered off, so that the system is quick and stable. When shooting state, arrestment mechanism 2 can keep lens module position unchangeable, need not to continue circular telegram and keeps lens module position, avoids the temperature rise of lens module and leads to stability to reduce. In addition, under the condition that does not use equipment, arrestment mechanism 2 keeps the lens module all the time under the outage state, avoids equipment to rock or the striking and produces abnormal sound, influence user experience, also can guarantee the performance of lens module, extension equipment life cycle.
Fig. 2 is a flowchart provided by another exemplary embodiment of the present disclosure, before the lens module reaches the target position, reducing the current through the actuating mechanism 2 when the lens module approaches the target position so that the actuating mechanism 2 contacts the lens module at step s 1041. Here, the position information of the lens module may be constantly acquired during the operation of the lens module, and the braking mechanism 2 may be brought into contact with the lens module by reducing the current passing through the braking mechanism 2 when the lens module is located close to the target position based on the difference between the real-time position information and the target position, thereby increasing the frictional force between the braking mechanism 2 and the lens module, and thus may play a role of decelerating the lens module. Thus, under the action of the braking mechanism 2, the lens module can reduce the speed more quickly, and the speed reduction control capability of the lens module is improved. Here, the current through the brake mechanism 2 may be gradually reduced as the lens module approaches the target position, i.e., the closer to the target position, the smaller the current through the brake mechanism 2 is, until the reduction is zero.
In the embodiment of the present disclosure, as shown in fig. 6, 8 and 10, the braking mechanism 2 may include a friction portion 21 for contacting the lens module, when the lens module approaches the target position, the current passing through the braking mechanism 2 is reduced to make the friction portion 21 form a first pressure on the lens module, and when the lens module reaches the target position, the braking mechanism 2 is controlled to be de-energized to make the friction portion 21 form a second pressure on the lens module, which is greater than the first pressure. It will be appreciated that the friction portion 21 may be elastically deformed when applying pressure to the lens module, the greater the deformation, the greater the pressure applied to the lens module, i.e. when reducing the current through the brake mechanism 2, the friction portion 21 is slightly elastically deformed, and the first pressure generated may slow down the movement of the lens module without keeping the lens module still. When the brake mechanism 2 is de-energized, the amount of deformation of the friction portion 21 is maximized, and a second pressure greater than the first pressure is generated to hold the lens module. The problem of deceleration and retention of the lens module can be solved well by elastic deformation by providing the friction portion 21, and the contact with the lens module does not cause abrasion to the lens module. The friction part 21 may be made of rubber or other wear-resistant materials, and when the carrier 32, described below, included in the lens module is made of rubber, the friction part 21 may also be made of metal material with elasticity, so as to prevent the friction between the two parts from generating dust, ensure the cleanliness of the device, and avoid dust pollution. In addition, in order to better avoid the friction dust, the friction part 21 may be configured to have a rounded corner, so that the friction part 21 is smoothly and smoothly matched with the lens module.
According to an embodiment of the present disclosure, the actuating mechanism may include an actuating portion mounted on the base 1 and a holding portion 24 for holding the lens module and interlocking with the actuating portion, and the step of controlling the actuating mechanism 2 to be energized to release the lens module includes: controlling the action part to be electrified so as to drive the holding part 24 to release the lens module; the step of controlling the brake mechanism 2 to be de-energized to hold the lens module includes: the control operation unit is powered off to return the holding unit 24 to the position where the lens module is held.
In the embodiment of the present disclosure, the holding portion 24 may have elasticity, when the actuating portion is powered on, the actuating portion may drive the holding portion 24 to generate elastic deflection, and when the actuating portion is powered off, the holding portion 24 may elastically return. The holding portion 24 may be made of a material having elasticity, and in the power-off state, the holding portion 24 may be pre-pressed on the lens module by a pre-pressure generated by its own elasticity, thereby holding the lens module.
Specifically, as shown in fig. 6, in one embodiment, the actuating portion may be made of a bimetal 22, the holding portion 24 is connected to the bimetal 22, an active layer of the bimetal 22 is disposed on a side close to the lens module, and a passive layer of the bimetal 22 is disposed on a side far from the lens module, and when the temperature rises, the deformation of the active layer is greater than that of the passive layer, so that the whole bimetal 22 is bent to the passive layer side. Therefore, the step of controlling the brake mechanism 2 to be energized to release the lens module includes: controlling the bimetallic strip 22 to be electrified so that the bimetallic strip 22 drives the holding part 24 to bend towards one side of the passive layer; the step of controlling the brake mechanism 2 to be de-energized to hold the lens module includes: the bimetal 22 is controlled to be deenergized, and the bimetal 22 makes the holding portion 24 return to one side of the active layer. Referring to fig. 11, a schematic diagram of the bimetal strip 22 after power-on is shown in dashed lines in fig. 11. According to the characteristics of the bimetallic strip, the temperature rises after the bimetallic strip 22 is electrified, the active layer is bent towards one side of the passive layer, so that the lens module is released, the temperature is reduced after the bimetallic strip 22 is powered off, the active layer can drive the passive layer to return, and the clamping state of the lens module is recovered. When the operating portion is made of a bimetal, the holding portion 24 may be made of a bimetal, and the active layer and the passive layer of the holding portion 24 are disposed in the same manner as the operating portion.
In another embodiment, the operating portion may be made of a shape memory alloy, and the operating portion has a high-temperature phase shape when energized and a low-temperature phase shape when de-energized. In the release position, the operating portion is energized, and the operating portion assumes a high-temperature phase shape that can deflect the holding portion 24 to the side away from the lens module, i.e., a state shown by a broken line in fig. 11; in the holding position, the operation portion is turned off, and the operation portion assumes a low-temperature phase shape that allows the holding portion 24 to return to the side close to the lens module, i.e., a state shown by a solid line in fig. 11.
Based on the above embodiment, as shown in fig. 6, the operating portion may be configured as a U-shaped structure, and connection terminals 23 for connection with the circuit board 6 are formed on both side walls of the U-shaped structure, respectively, for energizing the operating portion. The operation portion may be attached to the base 1 by bonding or hot riveting. The braking mechanism 2 may be disposed vertically as shown in fig. 1, or may be disposed horizontally as shown in fig. 12, and the specific disposition manner of the braking mechanism is not particularly limited in this disclosure.
When the operation part is made of a shape memory alloy, as shown in fig. 8 and 10, in another embodiment, the operation part may include a Shape Memory Alloy (SMA) wire 25 provided at one end of the holding part 24, the SMA wire 25 having a high temperature phase shape that is stretched or contracted at a high temperature and a low temperature phase shape that is opposite to the high temperature phase shape at a low temperature, and the step of controlling the brake mechanism 2 to be energized to release the lens module may include: controlling the SMA wire 25 to be electrified so as to drive the holding part 24 to deflect towards one side far away from the lens module through the high-temperature phase shape of the SMA wire 25; the step of controlling the brake mechanism 2 to be de-energized to hold the lens module includes: the SMA wire 25 is controlled to be powered off to return the holding portion 24 to the side close to the lens module by the low-temperature phase shape of the SMA wire 25. Here, the lens module is described as including the lens 31 and the carrier 32 for mounting the lens 31, and the number of the holding portions 24 may be two to hold the carrier 32. Alternatively, the number of the holding portions 24 may be other than one, and may be only one, and the holding portions may be held on one side of the carrier 32, or may be four, and may be uniformly distributed in the circumferential direction of the carrier 32. In one embodiment, as in the brake mechanism 2 shown in fig. 7 and 8, a first end of the holding portion 24 is provided at a side of the carrier 32 for holding the carrier 32, a second end of the holding portion 24 opposite to the first end is connected with the SMA wire 25, and a region of the holding portion 24 between the first end and the second end is rotatably mounted on the base 1 so that the first end and the second end move in opposite directions. In this way, the holding portion 24 forms a lever structure through a pivot point mounted on the base 1, i.e., when the SMA wire 25 contracts or stretches at the second end, the first end is correspondingly moved. Referring to fig. 13, when the SMA wire 25 is disposed on the side of the second end away from the carrier 32 (i.e., the left side of the SMA wire 25 in the drawing), the SMA wire 25 may be made to assume a stretched high-temperature phase shape after being energized, such that the second end is deflected toward the side close to the carrier 32 (i.e., the right side of the SMA wire 25 in the drawing), and the first end is away from the carrier 32, so as to release the carrier 32, and the SMA wire 25 assumes a contracted low-temperature phase shape after being de-energized, such that the first end is returned to clamp the carrier 32; similarly, referring to fig. 14, fig. 14 is a schematic motion diagram of a braking mechanism according to another embodiment provided by the present disclosure, and a dotted line is a state of the braking mechanism after being powered on, and when the SMA wire 25 is disposed on a side of the second end close to the carrier 32, the SMA wire 25 may be in a contracted high-temperature phase shape after being powered on, so that the first end is away from the carrier 32 while the second end deflects to the side close to the carrier 32, and similarly, the SMA wire returns in the opposite direction, which is not described herein again.
In particular, with continued reference to fig. 14, when the SMA wire 25 is disposed on the side of the second end proximate to the carrier 32 as described above, the second ends of the two holding portions 24 may be connected by the SMA wire 25, as described above, when the SMA wire 25 has a high-temperature phase shape that contracts at high temperatures and a low-temperature phase shape that stretches at low temperatures. The two holding portions 24 can be controlled simultaneously by the same SMA wire 25, so that the control procedure is simplified, and the two holding portions 24 can be operated in unison, thereby ensuring that the holding portions 24 hold the carrier 32 more stably.
Further, as shown in fig. 8 and 14, the carrier 32 may be provided with a first mounting block 321 in a protruding manner, and the first ends of the two holding portions 24 may be clamped on two sides of the first mounting block 321 to facilitate the mounting of the brake mechanism 2. Also, in order to facilitate the installation of the holding parts 24, a second installation block 11 may be formed on the base 1 between the two holding parts 24, and a region of the holding part 24 between the first and second ends may be rotatably installed on the second installation block 11 by a connection plate 241 so that the first and second ends move in opposite directions. Here, in order to facilitate the deflection of the second end, the second mounting block 11 may be formed with an area that is clear of the second end. In one embodiment, referring to fig. 8, the connecting plate 241 may be configured to be bent laterally along the holding portion 24, the connecting plate 241 may be bonded or heat staked to the second mounting block 11, and the holding portion 24 may be made of an elastic material, such as a metal material having elasticity, so that the holding portion 24 has elasticity, and thus the second end may elastically deflect relative to the connecting plate 241. In other words, after the SMA wire 25 is contracted by the power supply, the second end will deflect relative to the connecting plate 241 under the action of the SMA wire 25 and the self elasticity of the holding part 24, and after the SMA wire 25 is cut off, the second end will return under the action of the elasticity, so as to drive the first end to return to hold the lens module. In another embodiment, the holding portion 24 may be connected to the connecting plate 241 by a rotating shaft, so that the first and second ends may be deflected around the rotating shaft. In other embodiments, the connection plate 241 may be omitted, and a protrusion structure may be directly formed on the base 1 to bond or hot rivet the shaft for mounting the holding portion 24.
According to another embodiment of the present disclosure, in addition to the above-mentioned embodiment of the first mounting block 321 in which the holding portions 24 are clamped on the side surface of the carrier 32, the first ends of the two holding portions 24 may be clamped on the opposite side of the carrier 32, specifically, as shown in fig. 9, only one holding portion 24 is provided on one side of the carrier 32, the second end of each holding portion 24 opposite to the first end is rotatably mounted on the base 1, as can be mounted on the base 1 by means of a rotating shaft as described above, or as shown in fig. 10 and 17, a flange is formed at the second end, and the flange is bonded or heat staked on the base 1, and the holding portion 24 is made of an elastic material, so that the holding portion 24 can elastically deflect relative to the flange. One end of the SMA wire 25 is connected to the first end of the holding portion 24, and the other end is fixed to the base 1. The stretched or contracted shape of the SMA wire 25 may then be applied directly to the first end for gripping the carrier 32, making the transfer of its motion more direct and the responsive motion of the holder 24 more rapid. In the disclosed embodiment, referring to fig. 16 to 18, one end of the SMA wire 25 may be directly connected to the base 1, and the other end may be connected to the holding portion 24 through a connecting piece formed on the holding portion 24, in such a way that the SMA wire 25 may have a large amount of change in contraction, and it is easier to move the holding portion 24 away from the lens module. In another embodiment, referring to fig. 10, a third mounting block 12 may be formed on the base 1 on a side of the holding portion 24 away from the carrier 32, the SMA wire 25 may be connected to the third mounting block 12, and the SMA wire 25 may have a high-temperature phase shape that contracts at a high temperature and a low-temperature phase shape that stretches at a low temperature. Referring to figure 15, in this case the SMA wire 25 is energised to assume a contracted high temperature phase shape at the first end to pull the first end away from the carrier 32 to release the lens module, and de-energised the SMA wire 25 assumes an extended low temperature phase shape to return the first end to grip the carrier 32. In addition, the third mounting block 12 may also be disposed on the side of the holding portion 24 close to the carrier 32, and in this case, the SMA wire 25 may have a high-temperature phase shape and a low-temperature phase shape opposite to those described above, and the specific movement principle thereof has been described above, and will not be described in detail here to avoid repetition.
In the embodiment of the present disclosure, the base 1 may be provided with a position sensor, for example, a hall sensor, and the step of obtaining the position information of the lens module may include: acquiring position information of the lens module through a position sensor, the control method further comprising: and judging whether the position of the lens module is different from the target position or not according to the position information of the lens module acquired by the position sensor. Taking the lens module in fig. 5 as an example for explanation, a hall magnet 4 may be disposed on the lens module, a circuit board 6 for supplying power to the brake mechanism 2 may be mounted on the base 1, an integrated circuit 5 including a hall sensor is disposed on the circuit board 6, and the hall sensor detects the position of the hall magnet 4 to determine the position of the lens module, thereby controlling the circuit board 6 to power on or off the brake mechanism.
The lens module may include a lens 31, a carrier 32 for mounting the lens 31, and an electromagnetic driving mechanism for driving the carrier 32 to move, and the step of acquiring the position information of the lens module includes: acquiring position information of the carrier 32; the step of controlling the lens module to reach the target position based on the position information includes: based on the position information, the electromagnetic drive mechanism is controlled to be energized to drive the carrier 32 to the target position. Here, the positional information of the lens 31 can be determined by the carrier 32 for mounting the lens 31. The electromagnetic driving mechanism may be a focusing driving mechanism for focusing the device or may be an anti-shake driving mechanism for compensating shake of the device. The electromagnetic driving mechanism may be a reed driving mechanism, a ball driving mechanism, or a slide driving mechanism, which is not particularly limited in the present disclosure.
According to a second aspect of the present disclosure, there is also provided a lens module control system, and fig. 3 is a block diagram of the control system provided in an exemplary embodiment of the present disclosure. The lens module may include a lens module, a base 1 for mounting the lens module, and a detent mechanism 2 fixed on the base 1 and capable of holding the lens module, the detent mechanism 2 including a release position for releasing the lens module when power is turned on and a hold position for holding the lens module when power is turned off, the control system may include: a receiving module 201 configured to acquire position information of the lens module; a first control module 202 configured to control the brake mechanism 2 to be powered on or off after acquiring the position information of the lens module; and a second control module 203 configured to control the lens module action according to the position information. By receiving the position information acquired by the module 201, the first control module 202 is triggered to energize the brake mechanism 2 to release the lens module, and the second control module 203 is triggered to compensate for the shake or focus motion of the lens module. The brake mechanism 2 may be provided with a connection terminal 23 for electrical connection with the first control module 202.
Further, a position sensor for detecting the position of the lens module may be disposed on the base 1, and as shown in fig. 4, the control system may further include: a detection module 2011, the detection module 2011 is connected to the receiving module 201 and is configured to detect a position of the lens module. In addition, the control system may further include a determination module for determining whether the position of the lens module detected by the position sensor is different from the target position, and the determination module feeds back the position information detected by the position sensor to the receiving module 201, and thereby takes the next action. Here, the target position is a predetermined position already set in the system as described above.
According to a third aspect of the present disclosure, there is also provided a lens module including the lens module control system described above. The lens assembly has all the advantages of the lens module control system, and the details are not repeated herein.
The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.
It should be noted that, in the foregoing embodiments, various features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various combinations that are possible in the present disclosure are not described again.
In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.
Claims (10)
1. A lens module control method, characterized in that the lens module includes a lens module, a base (1) for mounting the lens module, and a brake mechanism (2) fixed to the base (1) and capable of holding the lens module, the method comprising:
acquiring position information of a lens module;
controlling the brake mechanism (2) to be energized to release the lens module;
controlling the lens module to act according to the position information;
controlling the brake mechanism (2) to be de-energized to hold the lens module when the lens module reaches a target position.
2. The method of claim 1, wherein before the lens module reaches the target position,
reducing the current through the brake mechanism (2) when the lens module is near the target position such that the brake mechanism (2) contacts the lens module.
3. The lens module control method according to claim 2, wherein the brake mechanism (2) includes a friction portion (21) for contacting the lens module,
reducing the current through the brake mechanism (2) when the lens module approaches the target position, so that the friction part (21) forms a first pressure on the lens module,
when the lens module reaches the target position, the brake mechanism (2) is controlled to be powered off, so that the friction part (21) forms a second pressure which is larger than the first pressure on the lens module.
4. The lens module control method according to claim 1, wherein the actuator mechanism (2) includes an actuating portion mounted on the base (1) and a holding portion (24) for holding the lens module and interlocking with the actuating portion,
the step of controlling the brake mechanism (2) to be energized to release the lens module comprises:
controlling the action part to be electrified so as to drive the holding part (24) to release the lens module;
the step of controlling the brake mechanism (2) to be de-energized to hold the lens module comprises:
and controlling the action part to be powered off so as to enable the holding part (24) to return to hold the lens module.
5. The lens module control method according to claim 4, wherein the actuating portion is made of a bimetal (22), the holding portion (24) is connected to the bimetal (22), an active layer of the bimetal (22) is disposed at a side close to the lens module, a passive layer of the bimetal (22) is disposed at a side far from the lens module,
the step of controlling the brake mechanism (2) to be energized to release the lens module comprises: controlling the bimetallic strip (22) to be electrified so that the bimetallic strip (22) drives the holding part (24) to deflect to one side of the passive layer;
the step of controlling the brake mechanism (2) to de-energize to clamp the lens module comprises: and controlling the bimetallic strip (22) to be powered off, wherein the bimetallic strip (22) enables the holding part (24) to return to one side of the active layer.
6. The lens module control method according to claim 4, wherein the action portion includes an SMA wire (25) provided at one end of the holding portion (24), the SMA wire (25) having a high-temperature phase shape in which it is stretched or contracted at a high temperature and a low-temperature phase shape opposite to the high-temperature phase shape at a low temperature,
the step of controlling the brake mechanism (2) to be energized to release the lens module comprises: controlling the SMA wire (25) to be electrified so as to drive the holding part (24) to deflect towards one side far away from the lens module through the high-temperature phase shape of the SMA wire (25);
the step of controlling the brake mechanism (2) to be de-energized to hold the lens module comprises: controlling the SMA wire (25) to be de-energized to return the holding part (24) to a side close to the lens module by a low-temperature phase shape of the SMA wire (25).
7. The method of claim 1, wherein a position sensor is disposed on the base (1), and the step of obtaining the position information of the lens module comprises:
acquiring position information of the lens module through the position sensor,
the control method comprises the following steps:
and judging whether the position of the lens module is different from a target position or not according to the position information of the lens module acquired by the position sensor.
8. The lens module control method according to claim 1, wherein the lens module includes a lens (31), a carrier (32) for mounting the lens (31), and an electromagnetic driving mechanism for driving the carrier (32) to move, and the step of acquiring the position information of the lens module includes:
-acquiring position information of the carrier (32);
the step of controlling the lens module to reach the target position according to the position information comprises:
and controlling the electromagnetic driving mechanism to be electrified according to the position information so as to drive the carrier (32) to reach a target position.
9. A lens module control system, characterized in that the lens module comprises a lens module, a base (1) for mounting the lens module, and an actuator mechanism (2) fixed to the base (1) and capable of clamping the lens module, the actuator mechanism (2) comprising a release position for releasing the lens module when powered on and a hold position for clamping the lens module when powered off, the control system comprising:
a receiving module (201) configured to acquire position information of the lens module;
a first control module (202) configured to control the brake mechanism (2) to be powered on or off after acquiring the position information of the lens module; and
a second control module (203) configured to control the lens module action according to the position information.
10. The lens module control system according to claim 9, wherein a position sensor is provided on the base (1), the control system further comprising:
a detection module (2011) connected with the receiving module (201) and used for detecting the position of the lens module.
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| CN202010266703.4A CN112782824B (en) | 2020-04-07 | 2020-04-07 | Lens module control system and control method thereof |
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| CN112782824B (en) | 2023-10-03 |
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