Patent ID: 12197035

DETAILED DESCRIPTION

In the following detailed description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the disclosed embodiments. It will be apparent, however, that one or more embodiments may be practiced without these specific details. In other instances, well-known structures and devices are schematically shown in order to simplify the drawing.

The present disclosure provides an imaging lens module that can include a base, a frame component, a plurality of rollable supporters, at least one imaging lens unit, an optical folding component, a sensing magnet group, a flexible printed circuit board, a driving coil group and a hall sensing component group.

The frame component can be coupled to the base so as to form an accommodation space therebetween.

The at least one imaging lens unit is movably located in the accommodation space. Specifically, the at least one imaging lens unit includes at least one plastic lens barrel and at least one plastic lens element group and has an optical axis. The at least one plastic lens barrel is movably supported by the base. The at least one plastic lens element group is accommodated in the at least one plastic lens barrel. The optical axis passes through the at least one plastic lens element group. Moreover, the base can have a guide groove that can extend along a direction in parallel with the optical axis and face the at least one imaging lens unit so as to guide the movement of the at least one imaging lens unit. Therefore, it is favorable for stabilizing the movement process of the at least one imaging lens unit. Moreover, the at least one imaging lens unit can also be movably supported by the base via the plurality of rollable supporters. That is, the plurality of rollable supporters can be located in the accommodation space and disposed between the at least one imaging lens unit and the base. Therefore, it is favorable for reducing sliding friction resistance generated in the movement process of the at least one imaging lens unit. Moreover, the rollable supporters can be disposed in the guide groove. Therefore, it is favorable for maintaining a relatively high driving collimation of the at least one imaging lens unit.

The optical folding component can be located in the accommodation space and can be disposed at an object side of the at least one imaging lens unit. The optical folding component can be a reflection mirror or a prism for folding an incident optical path into the at least one imaging lens unit to coincide with the optical axis. Therefore, it is favorable for miniaturizing the imaging lens module.

The sensing magnet group can be located in the accommodation space. Specifically, the sensing magnet group includes at least two sensing magnets that are sequentially disposed on the at least one plastic lens barrel along a direction in parallel with the optical axis. The at least two sensing magnets are located at the same side with respect to a reference plane that passes through the optical axis, and the reference plane has a normal direction perpendicular to the optical axis. Moreover, when the at least two sensing magnets are observed from the direction in parallel with the optical axis, images of the at least two sensing magnets are at least partially overlapped. Therefore, it is favorable for having flux density not excessively changed in the direction in parallel with the optical axis. Moreover, the sensing magnet group can also include three or more sensing magnets. Please refer toFIG.7, which is a chart showing flux density corresponding to the configuration of the sensing magnet group.

Two adjacent magnetic poles of the at least two sensing magnets are like poles between which there is a repulsive force. Moreover, the adjacent two magnetic like poles can be spaced apart from each other so as to ensure continuity of flux density. Therefore, it is favorable for ensuring sufficient flux density between the adjacent two magnetic like poles, and it is also favorable for ensuring that a release point will not exist in the period where hysteresis of the hall sensing component group occurs.

The flexible printed circuit board can be supported by the frame component. The flexible printed circuit board has flexibility. Therefore, it is favorable for further miniaturizing the imaging lens module.

The driving coil group can be disposed on the flexible printed circuit board along a direction in parallel with the optical axis. Moreover, the driving coil group and the sensing magnet group can be disposed opposite to each other so as to generate a Lorentz force by electromagnetic interaction therebetween. The Lorentz force can be a magnetic driving force for moving the at least one plastic lens barrel along a direction in parallel with the optical axis. Moreover, the driving efficiency of the driving coil group can be optimized by a proper space configuration.

The hall sensing component group can include at least two hall sensing components that are sequentially soldered on the flexible printed circuit board along a direction in parallel with the optical axis. Moreover, the hall sensing component group can also include three or more hall sensing components. Moreover, the hall sensing component group and the sensing magnet group can be disposed opposite to each other so as to sense a displacement of the at least one plastic lens barrel along the direction in parallel with the optical axis. Specifically, one of the at least two sensing magnets can be disposed corresponding to one of the at least two hall sensing component. When the sensing magnet is moved away from the corresponding hall sensing component due to the movement of the plastic lens barrel, the corresponding relationship therebetween can be replaced by another hall sensing component and the sensing magnet so as to sense the position of the sensing magnet, thereby obtaining the position of the plastic lens barrel which the sensing magnet is disposed on. Moreover, the sensing efficiency of the hall sensing component group can be optimized by a proper space configuration.

According to the present disclosure, the imaging lens module can further include at least one fixed imaging lens unit. The at least one fixed imaging lens unit includes at least one fixed plastic lens barrel and at least one fixed plastic lens element group that is accommodated in the at least one fixed plastic lens barrel. The at least one fixed imaging lens unit is immovable with respect to the base, while the at least one imaging lens unit is movable with respect to the base. Therefore, it is favorable for responding to an optical design requirement that only partial lens elements are moved for achieving zooming function so as to increase design flexibility and correspond to a relatively high-end optical requirement. Please refer toFIG.3,FIG.7andFIG.23, which respectively show the fixed imaging lens units14,34and44according to the 1st, 3rd and 4th embodiments of the present disclosure.

According to the present disclosure, the imaging lens module can further include an optical image stabilizer configured to be disposed on an image sensor for stabilizing an optical image signal on an image sensor converted from light passing through the at least one imaging lens unit. Therefore, it is favorable for providing a more reliable method for capturing the optical image signal so as to increase image quality. Please refer toFIG.28andFIG.29, which show the optical image stabilizer5aaccording to the 5th embodiment of the present disclosure.

According to the present disclosure, the imaging lens module can further include an auxiliary sensing magnet group, an auxiliary driving coil group and an auxiliary hall sensing component group that are disposed on the optical image stabilizer. Therefore, it is favorable for the auxiliary sensing magnet group, the auxiliary driving coil group and the auxiliary hall sensing component group to collaborate with one another, such that the image sensor is in a condition that can be driven so as to achieve an optical image stabilization function. Please refer toFIG.28andFIG.29, which show the auxiliary sensing magnet group5b, the auxiliary driving coil group5cand the auxiliary hall sensing component group5daccording to the 5th embodiment of the present disclosure.

When a shortest distance along the direction in parallel with the optical axis between two magnetic like poles among the at least two sensing magnets is Dp, a longest distance along the direction in parallel with the optical axis between two magnetic poles among the at least two sensing magnets is Dm, and the total quantity of the at least two sensing magnets is Nt, the following condition is satisfied: 0.1<Nt×Dp/(Dm−(Nt−1)×Dp)<3.2. Therefore, it is favorable for ensuring continuity of flux density between the sensing magnets, thereby accurately positioning the at least one plastic lens barrel. Moreover, the following condition can also be satisfied: 0.15<Nt×Dp/(Dm−(Nt−1)×Dp)<2. Therefore, it is favorable for increasing the sensing accuracy of the hall sensing component group. Please refer toFIG.7, which shows Dp and Dm according to the 1st embodiment of the present disclosure.

When the shortest distance along the direction in parallel with the optical axis between two magnetic like poles among the at least two sensing magnets is Dp, and the longest distance along the direction in parallel with the optical axis between two magnetic poles among the at least two sensing magnets is Dm, the following condition can be satisfied: 0<Dp/Dm<1. Therefore, it is favorable for ensuring the sensing efficiency of the hall sensing component group. Moreover, the following condition can also be satisfied: 0.1<Dp/Dm<0.8.

When the shortest distance along the direction in parallel with the optical axis between two magnetic like poles among the at least two sensing magnets is Dp, and a shortest distance along the direction in parallel with the optical axis between the at least two hall sensing components is Dh, the following condition can be satisfied: 0<Dh/Dp<3. Therefore, it is favorable for ensuring flux density of the sensing magnets can be accurately sensed by the hall sensing component group. Please refer toFIG.7, which shows Dp and Dh according to the 1st embodiment of the present disclosure.

According to the present disclosure, the aforementioned features and conditions can be utilized in numerous combinations so as to achieve corresponding effect.

According to the above description of the present disclosure, the following specific embodiments are provided for further explanation.

1st Embodiment

Please refer toFIG.1toFIG.7, whereFIG.1is a perspective view of the imaging lens module according to the 1st embodiment of the present disclosure,FIG.2is a partially exploded view of the imaging lens module inFIG.1,FIG.3is an exploded view of the imaging lens module inFIG.1,FIG.4is another exploded view of the imaging lens module inFIG.1,FIG.5is a front view showing the configuration of a flexible printed circuit board, a driving coil group, a hall sensing component group and a sensing magnet group of the imaging lens module inFIG.1,FIG.6is a side view showing the configuration of the flexible printed circuit board, the driving coil group, the hall sensing component group and the sensing magnet group of the imaging lens module inFIG.1, andFIG.7is a chart showing flux density and output voltage corresponding to the configuration of the driving coil group, the hall sensing component group and the sensing magnet group inFIG.5andFIG.6.

This embodiment provides an imaging lens module1that includes a base10, a frame component11, a plurality of rollable supporters12, a movable imaging lens unit13, a fixed imaging lens unit14, an optical folding component15, a sensing magnet group16, a flexible printed circuit board17, a driving coil group18and a hall sensing component group19.

The base10has a plurality of guide grooves101that extend along the same direction.

The frame component11is coupled to the base10so as to form an accommodation space AS therebetween.

The rollable supporters12are located in the accommodation space AS and disposed in the guide grooves101.

The movable imaging lens unit13is movably located in the accommodation space AS. Specifically, the movable imaging lens unit13includes a movable plastic lens barrel131and a movable plastic lens element group132and has an optical axis OA. The movable plastic lens barrel131has a plurality of guide grooves1311that face and correspond to the guide grooves101of the base10. The rollable supporters12are sandwiched by the guide grooves101and1311and are able to roll along an extension direction of the guide grooves101and1311, such that the movable plastic lens barrel131is movably supported by the base10. The movable plastic lens element group132is accommodated in the movable plastic lens barrel131and is able to be moved with respect to the base10by the movable plastic lens barrel131. The optical axis OA passes through the movable plastic lens element group132, and a direction of the optical axis OA is in parallel with the extension direction of the guide grooves101and1311.

The fixed imaging lens unit14is immovably located in the accommodation space AS and disposed at an object side of the movable imaging lens unit13. The fixed imaging lens unit14includes a fixed plastic lens barrel141and a fixed plastic lens element group142that is accommodated in the fixed plastic lens barrel141. Please be noted that each of the movable plastic lens element group132and the fixed plastic lens element group142can include one or more lens elements, and the present disclosure is not limited thereto.

The optical folding component15is located in the accommodation space AS and disposed at an object side of the fixed imaging lens unit14. The optical folding component15may be a reflection mirror or a prism that is able to fold an incident optical path10P from outside into the fixed imaging lens unit14and the movable imaging lens unit13so as to coincide with the optical axis OA.

The sensing magnet group16is located in the accommodation space AS. Specifically, the sensing magnet group16includes a first sensing magnet161and a second sensing magnet162that are sequentially disposed on the movable plastic lens barrel131along a direction in parallel with the optical axis OA. The first sensing magnet161and the second sensing magnet162are located at the same side with respect to a reference plane (not shown) that passes through the optical axis OA, and the reference plane has a normal direction perpendicular to the optical axis OA. That is, the optical axis OA is located on the reference plane. When the first sensing magnet161and the second sensing magnet162are observed from the direction in parallel with the optical axis OA, images of the first sensing magnet161and the second sensing magnet162are at least partially overlapped. Two adjacent magnetic poles of the first sensing magnet161and the second sensing magnet162are south poles between which there is a repulsive force.

The flexible printed circuit board17is supported by the frame component11, and the flexible printed circuit board17has flexibility.

The driving coil group18is disposed on the flexible printed circuit board17along a direction in parallel with the optical axis OA. The driving coil group18includes six driving coils181,182,183,184,185and186that are opposite to the first sensing magnet161and the second sensing magnet162of the sensing magnet group16. The driving coil group18and the sensing magnet group16generate a Lorentz force by electromagnetic interaction therebetween that can be a magnetic driving force for moving the movable plastic lens barrel131along a direction in parallel with the optical axis OA. When the movable plastic lens barrel131is in its original position, the first sensing magnet161corresponds to three driving coils181,182and183, and the second sensing magnet162corresponds to another three driving coils184,185and186, such that the first sensing magnet161and the second sensing magnet162can at least partially opposite to the driving coils181,182,183,184,185and186after moving the movable plastic lens barrel131, thereby ensuring a sufficient magnetic driving force can be continuously generated therebetween.

The hall sensing component group19includes six hall sensing components191,192,193,194,195and196that are sequentially soldered on the flexible printed circuit board17along a direction in parallel with the optical axis OA and may be respectively located at central positions of the driving coils181,182,183,184,185and186, as shown inFIG.4. When the movable plastic lens barrel131is in its original position, the first sensing magnet161corresponds to three hall sensing components191,192and193, and the second sensing magnet162corresponds to another three hall sensing components194,195and196, such that the first sensing magnet161and the second sensing magnet162can at least partially opposite to the hall sensing components191,192,193,194,195and196after moving the movable plastic lens barrel131, thereby accurately sensing the positions of the first sensing magnet161and the second sensing magnet162, then obtaining the position of the movable plastic lens barrel131, and thus calculating the displacement of the movable plastic lens barrel131.

Specifically, by a proper space configuration, flux density generated by the sensing magnet group16along the direction in parallel with the optical axis OA can be referred to the chart inFIG.7. As shown inFIG.7, the flux density changes along the direction in parallel with the optical axis OA according to the positions of the magnetic poles of the first sensing magnet161and the second sensing magnet162, and an output voltage can be generated on the hall sensing component group19from a release point to a working point of the flux density. The hall sensing component group19can obtain the high potential H and the low potential L of the output voltage to deduce the position of each magnetic pole of the sensing magnet group16, thereby timely obtaining the position of the movable plastic lens barrel131. Note that the proper space configuration will be achieved by the following conditions.

When a shortest distance along the direction in parallel with the optical axis OA between two magnetic south poles among the first sensing magnet161and the second sensing magnet162is Dp, a longest distance along the direction in parallel with the optical axis OA between two magnetic poles among the first sensing magnet161and the second sensing magnet162is Dm, and the total quantity of the sensing magnets of the sensing magnet group16is Nt, the following conditions are satisfied: Dp=2.62 [mm]; Dm=9.62 [mm]; Nt=2; and Nt×Dp/(Dm−(Nt−1)×Dp)=0.75.

When the shortest distance along the direction in parallel with the optical axis OA between two magnetic south poles among the first sensing magnet161and the second sensing magnet162is Dp, and the longest distance along the direction in parallel with the optical axis OA between two magnetic poles among the first sensing magnet161and the second sensing magnet162is Dm, the following condition is satisfied: Dp/Dm=0.27.

When the shortest distance along the direction in parallel with the optical axis OA between two magnetic south poles among the first sensing magnet161and the second sensing magnet162is Dp, and a shortest distance along the direction in parallel with the optical axis OA between the hall sensing components191,192,193,194,195and196is Dh, the following condition is satisfied: Dh=1.40 [mm]; and Dh/Dp=0.53.

2nd Embodiment

Please refer toFIG.8toFIG.14, whereFIG.8is a perspective view of the imaging lens module according to the 2nd embodiment of the present disclosure,FIG.9is a partially exploded view of the imaging lens module inFIG.8,FIG.10is an exploded view of the imaging lens module inFIG.8,FIG.11is another exploded view of the imaging lens module inFIG.8,FIG.12is a front view showing the configuration of a flexible printed circuit board, a driving coil group, a hall sensing component group and a sensing magnet group of the imaging lens module inFIG.8,FIG.13is a side view showing the configuration of the flexible printed circuit board, the driving coil group, the hall sensing component group and the sensing magnet group of the imaging lens module inFIG.8, andFIG.14is a chart showing flux density and output voltage corresponding to the configuration of the driving coil group, the hall sensing component group and the sensing magnet group inFIG.12andFIG.13.

This embodiment provides an imaging lens module2that includes a base20, a frame component21, a plurality of rollable supporters22, two movable imaging lens units23, an optical folding component25, two sensing magnet groups26, a flexible printed circuit board27, two driving coil groups28and two hall sensing component groups29.

The base20has a plurality of guide grooves201that extend along the same direction.

The frame component21is coupled to the base20so as to form an accommodation space AS therebetween.

The rollable supporters22are located in the accommodation space AS and disposed in the guide grooves201.

The movable imaging lens units23are movably located in the accommodation space AS. Specifically, the movable imaging lens units23each include a movable plastic lens barrel231and a movable plastic lens element group232and has an optical axis OA. The movable plastic lens barrels231each have a plurality of guide grooves2311that face and correspond to the guide grooves201of the base20. The rollable supporters22are sandwiched by the guide grooves201and2311and are able to roll along an extension direction of the guide grooves201and2311, such that the movable plastic lens barrels231are movably supported by the base20. The movable plastic lens element groups232are respectively accommodated in the movable plastic lens barrels231and are able to be moved with respect to the base20by the movable plastic lens barrels231. The optical axis OA passes through the movable plastic lens element groups232, and a direction of the optical axis OA is in parallel with the extension direction of the guide grooves201and2311. Please be noted that each of the movable plastic lens element groups232can include one or more lens elements, and the present disclosure is not limited thereto.

The optical folding component25is located in the accommodation space AS and disposed at an object side of the movable imaging lens units23. The optical folding component25may be a reflection mirror or a prism that is able to fold an incident optical path10P from outside into the movable imaging lens units23so as to coincide with the optical axis OA.

The sensing magnet groups26are located in the accommodation space AS. Specifically, the sensing magnet groups26each include a first sensing magnet261and a second sensing magnet262that are sequentially disposed on one of the movable plastic lens barrels231along directions in parallel with the optical axis OA. The sensing magnet groups26are respectively located at two opposite sides of the optical axis OA, the first sensing magnet261and the second sensing magnet262of each sensing magnet group26are located at the same side with respect to a reference plane (not shown) that passes through the optical axis OA, and the reference plane has a normal direction perpendicular to the optical axis OA. That is, the optical axis OA is located on the reference plane. When the first sensing magnet261and the second sensing magnet262of each sensing magnet group26are observed from the direction in parallel with the optical axis OA, images of the first sensing magnet261and the second sensing magnet262of each sensing magnet group26are at least partially overlapped. Two adjacent magnetic poles of the first sensing magnet261and the second sensing magnet262of each sensing magnet group26are south poles between which there is a repulsive force.

The flexible printed circuit board27is supported by the frame component21, and the flexible printed circuit board27has flexibility.

The driving coil groups28are disposed on the flexible printed circuit board27along directions in parallel with the optical axis OA. The driving coil groups28each include three driving coils281,282and283that are opposite to the first sensing magnet261and the second sensing magnet262of one of the sensing magnet groups26. The driving coil groups28and the sensing magnet groups26generate Lorentz forces by electromagnetic interaction therebetween that can be magnetic driving forces for moving the movable plastic lens barrels231along a direction in parallel with the optical axis OA. When the movable plastic lens barrels231are in their original positions, the first sensing magnets261correspond to the driving coils281, and the second sensing magnets262correspond to the driving coils282and283, such that the first sensing magnets261and the second sensing magnets262can at least partially opposite to the driving coils281,282and283after moving the movable plastic lens barrels231, thereby ensuring sufficient magnetic driving forces can be continuously generated therebetween.

The hall sensing component groups29each include three hall sensing components291,292and293that are sequentially soldered on the flexible printed circuit board27along directions in parallel with the optical axis OA and may be respectively located at central positions of the driving coils281,282and283, as shown inFIG.11. When the movable plastic lens barrels231are in their original positions, the first sensing magnets261correspond to the hall sensing components291, and the second sensing magnets262correspond to the hall sensing components292and293, such that the first sensing magnets261and the second sensing magnets262can at least partially opposite to the hall sensing components291,292and293after moving the movable plastic lens barrels231, thereby accurately sensing the positions of the first sensing magnet261and the second sensing magnet262, then obtaining the positions of the movable plastic lens barrels231, and thus calculating the displacements of the movable plastic lens barrels231.

Specifically, by a proper space configuration, flux density generated by the sensing magnet groups26along the direction in parallel with the optical axis OA can be referred to the chart inFIG.14. As shown inFIG.14, the flux density changes along the direction in parallel with the optical axis OA according to the positions of the magnetic poles of the first sensing magnets261and the second sensing magnets262, and an output voltage can be generated on the hall sensing component groups29from a release point to a working point of the flux density. The hall sensing component groups29can obtain the high potential H and the low potential L of the output voltage to deduce the position of each magnetic pole of the sensing magnet groups26, thereby timely obtaining the positions of the movable plastic lens barrels231. Note that the proper space configuration will be achieved by the following conditions.

When a shortest distance along the direction in parallel with the optical axis OA between two magnetic south poles among the first sensing magnet261and the second sensing magnet262of each of the of the sensing magnet groups26is Dp, a longest distance along the direction in parallel with the optical axis OA between two magnetic poles among the first sensing magnet261and the second sensing magnet262of each of the of the sensing magnet groups26is Dm, and the total quantity of the sensing magnets of each of the of the sensing magnet groups26is Nt, the following conditions are satisfied: Dp=1.53 [mm]; Dm=5.03 [mm]; Nt=2; and Nt×Dp/(Dm−(Nt−1)×Dp)=0.87.

When the shortest distance along the direction in parallel with the optical axis OA between two magnetic south poles among the first sensing magnet261and the second sensing magnet262of each of the of the sensing magnet groups26is Dp, and the longest distance along the direction in parallel with the optical axis OA between two magnetic poles among the first sensing magnet261and the second sensing magnet262of each of the of the sensing magnet groups26is Dm, the following condition is satisfied: Dp/Dm=0.30.

When the shortest distance along the direction in parallel with the optical axis OA between two magnetic south poles among the first sensing magnet261and the second sensing magnet262of each of the of the sensing magnet groups26is Dp, and a shortest distance along the direction in parallel with the optical axis OA between the hall sensing components291,292and293of each of the hall sensing component groups29is Dh, the following condition is satisfied: Dh=1.40 [mm]; and Dh/Dp=0.92.

3rd Embodiment

Please refer toFIG.15toFIG.21, whereFIG.15is a perspective view of the imaging lens module according to the 3rd embodiment of the present disclosure,FIG.16is a partially exploded view of the imaging lens module inFIG.15,FIG.17is an exploded view of the imaging lens module inFIG.15,FIG.18is another exploded view of the imaging lens module inFIG.15,FIG.19is a front view showing the configuration of a flexible printed circuit board, a driving coil group, a hall sensing component group and a sensing magnet group of the imaging lens module inFIG.15,FIG.20is a side view showing the configuration of the flexible printed circuit board, the driving coil group, the hall sensing component group and the sensing magnet group of the imaging lens module inFIG.15, andFIG.21is a chart showing flux density and output voltage corresponding to the configuration of the driving coil group, the hall sensing component group and the sensing magnet group inFIG.19andFIG.20.

This embodiment provides an imaging lens module3that includes a base30, a frame component31, a plurality of rollable supporters32, a movable imaging lens unit33, two fixed imaging lens units34, an optical folding component35, a sensing magnet group36, a flexible printed circuit board37, a driving coil group38and a hall sensing component group39.

The base30has a plurality of guide grooves301that extend along the same direction.

The frame component31is coupled to the base30so as to form an accommodation space AS therebetween.

The rollable supporters32are located in the accommodation space AS and disposed in the guide grooves301.

The movable imaging lens unit33is movably located in the accommodation space AS. Specifically, the movable imaging lens unit33includes a movable plastic lens barrel331and a movable plastic lens element group332and has an optical axis OA. The movable plastic lens barrel331has a plurality of guide grooves3311that face and correspond to the guide grooves301of the base30. The rollable supporters32are sandwiched by the guide grooves301and3311and are able to roll along an extension direction of the guide grooves301and3311, such that the movable plastic lens barrel331is movably supported by the base30. The movable plastic lens element group332is accommodated in the movable plastic lens barrel331and is able to be moved with respect to the base30by the movable plastic lens barrel331. The optical axis OA passes through the movable plastic lens element group332, and a direction of the optical axis OA is in parallel with the extension direction of the guide grooves301and3311.

The fixed imaging lens units34are immovably located in the accommodation space AS and respectively disposed at an object side and an image-side of the movable imaging lens unit33. The fixed imaging lens units34each include a fixed plastic lens barrel341and a fixed plastic lens element group342that is accommodated in the fixed plastic lens barrel341. Please be noted that each of the movable plastic lens element group332and the fixed plastic lens element groups342can include one or more lens elements, and the present disclosure is not limited thereto.

The optical folding component35is located in the accommodation space AS and disposed at an object side of the movable imaging lens unit33and the fixed imaging lens units34. The optical folding component35may be a reflection mirror or a prism that is able to fold an incident optical path10P from outside into the fixed imaging lens units34and the movable imaging lens unit33so as to coincide with the optical axis OA.

The sensing magnet group36is located in the accommodation space AS. Specifically, the sensing magnet group36includes a first sensing magnet361and a second sensing magnet362that are sequentially disposed on the movable plastic lens barrel331along a direction in parallel with the optical axis OA. The first sensing magnet361and the second sensing magnet362are located at the same side with respect to a reference plane (not shown) that passes through the optical axis OA, and the reference plane has a normal direction perpendicular to the optical axis OA. That is, the optical axis OA is located on the reference plane. When the first sensing magnet361and the second sensing magnet362are observed from the direction in parallel with the optical axis OA, images of the first sensing magnet361and the second sensing magnet362are at least partially overlapped. Two adjacent magnetic poles of the first sensing magnet361and the second sensing magnet362are south poles between which there is a repulsive force.

The flexible printed circuit board37is supported by the frame component31, and the flexible printed circuit board37has flexibility.

The driving coil group38is disposed on the flexible printed circuit board37along a direction in parallel with the optical axis OA. The driving coil group38includes six driving coils381,382,383,384,385and386that are opposite to the first sensing magnet361and the second sensing magnet362of the sensing magnet group36. The driving coil group38and the sensing magnet group36generate a Lorentz force by electromagnetic interaction therebetween that can be a magnetic driving force for moving the movable plastic lens barrel331along a direction in parallel with the optical axis OA. When the movable plastic lens barrel331is in its original position, the first sensing magnet361corresponds to three driving coils381,382and383, and the second sensing magnet362corresponds to another three driving coils384,385and386, such that the first sensing magnet361and the second sensing magnet362can at least partially opposite to the driving coils381,382,383,384,385and386after moving the movable plastic lens barrel331, thereby ensuring a sufficient magnetic driving force can be continuously generated therebetween.

The hall sensing component group39includes six hall sensing components391,392,393,394,395and396that are sequentially soldered on the flexible printed circuit board37along a direction in parallel with the optical axis OA and may be respectively located at central positions of the driving coils381,382,383,384,385and386, as shown inFIG.18. When the movable plastic lens barrel331is in its original position, the first sensing magnet361corresponds to three hall sensing components391,392and393, and the second sensing magnet362corresponds to another three hall sensing components394,395and396, such that the first sensing magnet361and the second sensing magnet362can at least partially opposite to the hall sensing components391,392,393,394,395and396after moving the movable plastic lens barrel331, thereby accurately sensing the positions of the first sensing magnet361and the second sensing magnet362, then obtaining the position of the movable plastic lens barrel331, and thus calculating the displacement of the movable plastic lens barrel331.

Specifically, by a proper space configuration, flux density generated by the sensing magnet group36along the direction in parallel with the optical axis OA can be referred to the chart inFIG.21. As shown inFIG.21, the flux density changes along the direction in parallel with the optical axis OA according to the positions of the magnetic poles of the first sensing magnet361and the second sensing magnet362, and an output voltage can be generated on the hall sensing component group39from a release point to a working point of the flux density. The hall sensing component group39can obtain the high potential H and the low potential L of the output voltage to deduce the position of each magnetic pole of the sensing magnet group36, thereby timely obtaining the position of the movable plastic lens barrel331. Note that the proper space configuration will be achieved by the following conditions.

When a shortest distance along the direction in parallel with the optical axis OA between two magnetic south poles among the first sensing magnet361and the second sensing magnet362is Dp, a longest distance along the direction in parallel with the optical axis OA between two magnetic poles among the first sensing magnet361and the second sensing magnet362is Dm, and the total quantity of the sensing magnets of the sensing magnet group36is Nt, the following conditions are satisfied: Dp=0.82 [mm]; Dm=7.82 [mm]; Nt=2; and Nt×Dp/(Dm−(Nt−1)×Dp)=0.23.

When the shortest distance along the direction in parallel with the optical axis OA between two magnetic south poles among the first sensing magnet361and the second sensing magnet362is Dp, and the longest distance along the direction in parallel with the optical axis OA between two magnetic poles among the first sensing magnet361and the second sensing magnet362is Dm, the following condition is satisfied: Dp/Dm=0.10.

When the shortest distance along the direction in parallel with the optical axis OA between two magnetic south poles among the first sensing magnet361and the second sensing magnet362is Dp, and a shortest distance along the direction in parallel with the optical axis OA between the hall sensing components391,392,393,394,395and396is Dh, the following condition is satisfied: Dh=1.40 [mm]; and Dh/Dp=1.71.

4th Embodiment

Please refer toFIG.22toFIG.27, whereFIG.22is a perspective view of the imaging lens module according to the 4th embodiment of the present disclosure,FIG.23is an exploded view of the imaging lens module inFIG.22,FIG.24is another exploded view of the imaging lens module inFIG.22,FIG.25is a front view showing the configuration of a flexible printed circuit board, a driving coil group, a hall sensing component group and a sensing magnet group of the imaging lens module inFIG.22,FIG.26is a side view showing the configuration of the flexible printed circuit board, the driving coil group, the hall sensing component group and the sensing magnet group of the imaging lens module inFIG.22, andFIG.27is a chart showing flux density and output voltage corresponding to the configuration of the driving coil group, the hall sensing component group and the sensing magnet group inFIG.25andFIG.26.

This embodiment provides an imaging lens module4that includes a base40, a frame component41, a plurality of rollable supporters42, a movable imaging lens unit43, a fixed imaging lens unit44, an optical folding component45, a sensing magnet group46, a flexible printed circuit board47, a driving coil group48and a hall sensing component group49.

The base40has a plurality of guide grooves401that extend along the same direction.

The frame component41is coupled to the base40so as to form an accommodation space AS therebetween.

The rollable supporters42are located in the accommodation space AS and disposed in the guide grooves401.

The movable imaging lens unit43is movably located in the accommodation space AS. Specifically, the movable imaging lens unit43includes a movable plastic lens barrel431and a movable plastic lens element group432and has an optical axis OA. The movable plastic lens barrel431has a plurality of guide grooves4311that face and correspond to the guide grooves401of the base40. The rollable supporters42are sandwiched by the guide grooves401and4311and are able to roll along an extension direction of the guide grooves401and4311, such that the movable plastic lens barrel431is movably supported by the base40. The movable plastic lens element group432is accommodated in the movable plastic lens barrel431and is able to be moved with respect to the base40by the movable plastic lens barrel431. The optical axis OA passes through the movable plastic lens element group432, and a direction of the optical axis OA is in parallel with the extension direction of the guide grooves401and4311.

The fixed imaging lens unit44is immovably located in the accommodation space AS and disposed at an object side of the movable imaging lens unit43. The fixed imaging lens unit44includes a fixed plastic lens barrel441and a fixed plastic lens element group442that is accommodated in the fixed plastic lens barrel441. Please be noted that each of the movable plastic lens element group432and the fixed plastic lens element group442can include one or more lens elements, and the present disclosure is not limited thereto.

The optical folding component45is located in the accommodation space AS and disposed at an object side of the fixed imaging lens unit44. The optical folding component45may be a reflection mirror or a prism that is able to fold an incident optical path10P from outside into the fixed imaging lens unit44and the movable imaging lens unit43so as to coincide with the optical axis OA.

The sensing magnet group46is located in the accommodation space AS. Specifically, the sensing magnet group46includes a first sensing magnet461, a second sensing magnet462and a third sensing magnet463that are sequentially disposed on the movable plastic lens barrel431along a direction in parallel with the optical axis OA. The first sensing magnet461, the second sensing magnet462and the third sensing magnet463are located at the same side with respect to a reference plane (not shown) that passes through the optical axis OA, and the reference plane has a normal direction perpendicular to the optical axis OA. That is, the optical axis OA is located on the reference plane. When the first sensing magnet461, the second sensing magnet462and the third sensing magnet463are observed from the direction in parallel with the optical axis OA, images of the first sensing magnet461, the second sensing magnet462and the third sensing magnet463are at least partially overlapped. Two adjacent magnetic poles of the first sensing magnet461and the second sensing magnet462are south poles between which there is a repulsive force. Two adjacent magnetic poles of the second sensing magnet462and the third sensing magnet463are north poles between which there is a repulsive force.

The flexible printed circuit board47is supported by the frame component41, and the flexible printed circuit board47has flexibility.

The driving coil group48is disposed on the flexible printed circuit board47along a direction in parallel with the optical axis OA. The driving coil group48includes six driving coils481,482,483,484,485and486that are opposite to the first sensing magnet461, the second sensing magnet462and the third sensing magnet463of the sensing magnet group46. The driving coil group48and the sensing magnet group46generate a Lorentz force by electromagnetic interaction therebetween that can be a magnetic driving force for moving the movable plastic lens barrel431along a direction in parallel with the optical axis OA. When the movable plastic lens barrel431is in its original position, the first sensing magnet461corresponds to three driving coils481,482and483, the second sensing magnet462corresponds to three driving coils483,484and485, and the third sensing magnet463corresponds to two driving coils485and486, such that the first sensing magnet461, the second sensing magnet462and the third sensing magnet463can at least partially opposite to the driving coils481,482,483,484,485and486after moving the movable plastic lens barrel431, thereby ensuring a sufficient magnetic driving force can be continuously generated therebetween.

The hall sensing component group49includes six hall sensing components491,492,493,494,495and496that are sequentially soldered on the flexible printed circuit board47along a direction in parallel with the optical axis OA and may be respectively located at central positions of the driving coils481,482,483,484,485and486, as shown inFIG.24. When the movable plastic lens barrel431is in its original position, the first sensing magnet461corresponds to two hall sensing components491and492, the second sensing magnet462corresponds to three hall sensing components493,494and495, and the third sensing magnet463corresponds to the other one hall sensing component496, such that the first sensing magnet461, the second sensing magnet462and the third sensing magnet463can at least partially opposite to the hall sensing components491,492,493,494,495and496after moving the movable plastic lens barrel431, thereby accurately sensing the positions of the first sensing magnet461, the second sensing magnet462and the third sensing magnet463, then obtaining the position of the movable plastic lens barrel431, and thus calculating the displacement of the movable plastic lens barrel431.

Specifically, by a proper space configuration, flux density generated by the sensing magnet group46along the direction in parallel with the optical axis OA can be referred to the chart inFIG.27. As shown inFIG.27, the flux density changes along the direction in parallel with the optical axis OA according to the positions of the magnetic poles of the first sensing magnet461, the second sensing magnet462and the third sensing magnet463, and an output voltage can be generated on the hall sensing component group49from a release point to a working point of the flux density. The hall sensing component group49can obtain the high potential H and the low potential L of the output voltage to deduce the position of each magnetic pole of the sensing magnet group46, thereby timely obtaining the position of the movable plastic lens barrel431. Note that the proper space configuration will be achieved by the following conditions.

When a shortest distance along the direction in parallel with the optical axis OA between two magnetic south poles or two magnetic north poles among the first sensing magnet461, the second sensing magnet462and the third sensing magnet463is Dp, a longest distance along the direction in parallel with the optical axis OA between two magnetic poles among the first sensing magnet461, the second sensing magnet462and the third sensing magnet463is Dm, and the total quantity of the sensing magnets of the sensing magnet group46is Nt, the following conditions are satisfied: Dp=0.82 [mm]; Dm=12.13 [mm]; Nt=2; and Nt×Dp/(Dm−(Nt−1)×Dp)=0.23.

When the shortest distance along the direction in parallel with the optical axis OA between two magnetic south poles or two magnetic north poles among the first sensing magnet461, the second sensing magnet462and the third sensing magnet463is Dp, and the longest distance along the direction in parallel with the optical axis OA between two magnetic poles among the first sensing magnet461, the second sensing magnet462and the third sensing magnet463is Dm, the following condition is satisfied: Dp/Dm=0.07.

When the shortest distance along the direction in parallel with the optical axis OA between two magnetic south poles or two magnetic north poles among the first sensing magnet461, the second sensing magnet462and the third sensing magnet463is Dp, and a shortest distance along the direction in parallel with the optical axis OA between the hall sensing components491,492,493,494,495and496is Dh, the following condition is satisfied: Dh=1.40 [mm]; and Dh/Dp=1.71.

5th Embodiment

Please refer toFIG.28toFIG.29, whereFIG.28is an exploded view of a camera module according to the 5th embodiment of the present disclosure, andFIG.29is another exploded view of the camera module inFIG.28.

This embodiment provides a camera module C5that includes an imaging lens module5and an image sensor IS. The imaging lens module5may be similar to the imaging lens module3of the 3rd embodiment, and only differences between this and the above-mentioned embodiments will be described hereinafter. In addition, the camera module C5may also include the imaging lens module of other embodiment, and the present disclosure is not limited thereto.

The imaging lens module5has an image surface (not shown), and the image surface IS is disposed on the image surface of the imaging lens module5so as to convert light passing through the imaging lens module5into an optical image signal.

The imaging lens module5further includes an optical image stabilizer5a, an auxiliary sensing magnet group5b, an auxiliary driving coil group5cand an auxiliary hall sensing component group5d. The optical image stabilizer5ais disposed on the image sensor IS and is able to move the image sensor IS so as to stabilize the converted optical image signal on the image sensor IS. The auxiliary sensing magnet group5b, the auxiliary driving coil group5cand the auxiliary hall sensing component group5dare disposed on the optical image stabilizer5ato collaborate with one another to move the optical image stabilizer5a, such that the image sensor IS is in a condition that can be driven so as to achieve an optical image stabilization function.

6th Embodiment

Please refer toFIG.30andFIG.31, whereinFIG.30is a perspective view of an electronic device according to the 6th embodiment of the present disclosure, andFIG.31is another perspective view of the electronic device inFIG.30.

In this embodiment, an electronic device6is a smartphone including a plurality of camera modules, a flash module61, a focus assist module62, an image signal processor63, a display module (user interface)64and an image software processor (not shown).

The camera modules include an ultra-wide-angle camera module60a, a high pixel camera module60band a telephoto camera module60c. The camera module C5disclosed in the 5th embodiment is taken as the telephoto camera module60c, but the present disclosure is not limited thereto.

The image captured by the ultra-wide-angle camera module60aenjoys a feature of multiple imaged objects.FIG.32is an image captured by the ultra-wide-angle camera module60a.

The image captured by the high pixel camera module60benjoys a feature of high resolution and less distortion, and the high pixel camera module60bcan capture part of the image inFIG.32.FIG.33is an image captured by the high pixel camera module60b.

The image captured by the telephoto camera module60cenjoys a feature of high optical magnification, and the telephoto camera module60ccan capture part of the image inFIG.33.FIG.34is an image captured by the telephoto camera module60c. The maximum field of view (FOV) of the camera module C5corresponds to the field of view inFIG.34.

When a user captures images of an object, the light rays converge in the ultra-wide-angle camera module60a, the high pixel camera module60bor the telephoto camera module60cto generate images, and the flash module61is activated for light supplement. The focus assist module62detects the object distance of the imaged object to achieve fast auto focusing. The image signal processor63is configured to optimize the captured image to improve image quality and provided zooming function. The light beam emitted from the focus assist module62can be either conventional infrared or laser. The display module64can include a touch screen, and the user is able to interact with the display module64and the image software processor having multiple functions to capture images and complete image processing. Alternatively, the user may capture images via a physical button. The image processed by the image software processor can be displayed on the display module64.

7th Embodiment

Please refer toFIG.35, which is a perspective view of an electronic device according to the 7th embodiment of the present disclosure.

In this embodiment, an electronic device7is a smartphone including the camera module C5disclosed in the 5th embodiment, a camera module70a, a camera module70b, a camera module70c, a camera module70d, a camera module70e, a camera module70f, a camera module70g, a camera module70h, a flash module71, an image signal processor, a display module and an image software processor (not shown). The camera module C5, the camera module70a, the camera module70b, the camera module70c, the camera module70d, the camera module70e, the camera module70f, the camera module70gand the camera module70hare disposed on the same side of the electronic device7, while the display module is disposed on the opposite side of the electronic device7.

The camera module C5is a telephoto camera module, the camera module70ais a telephoto camera module, the camera module70bis a telephoto camera module, the camera module70cis a telephoto camera module, the camera module70dis a wide-angle camera module, the camera module70eis a wide-angle camera module, the camera module70fis an ultra-wide-angle camera module, the camera module70gis an ultra-wide-angle camera module, and the camera module70his a ToF (time of flight) camera module. In this embodiment, the camera module C5, the camera module70a, the camera module70b, the camera module70c, the camera module70d, the camera module70e, the camera module70fand the camera module70ghave different fields of view, such that the electronic device7can have various magnification ratios so as to meet the requirement of optical zoom functionality. In addition, the camera module C5and the camera module70aare telephoto camera modules having the optical folding component configuration. In addition, the camera module70hcan determine depth information of the imaged object. In this embodiment, the electronic device7includes a plurality of camera modules1,70a,70b,70c,70d,70e,70f,70g, and70h, but the present disclosure is not limited to the number and arrangement of camera module. When a user captures images of an object, the light rays converge in the camera modules C5,70a,70b,70c,70d,70e,70f,70gor70hto generate an image(s), and the flash module71is activated for light supplement. Further, the subsequent processes are performed in a manner similar to the abovementioned embodiments, so the details in this regard will not be provided again.

The smartphones in the embodiments are only exemplary for showing the image capturing unit and the camera module of the present disclosure installed in an electronic device, and the present disclosure is not limited thereto. The image capturing unit and the camera module can be optionally applied to optical systems with a movable focus. Furthermore, the image capturing unit and the camera module feature good capability in aberration corrections and high image quality, and can be applied to 3D (three-dimensional) image capturing applications, in products such as digital cameras, mobile devices, digital tablets, smart televisions, network surveillance devices, dashboard cameras, vehicle backup cameras, multi-camera devices, image recognition systems, motion sensing input devices, wearable devices and other electronic imaging devices.

The foregoing description, for the purpose of explanation, has been described with reference to specific embodiments. It is to be noted that the present disclosure shows different data of the different embodiments; however, the data of the different embodiments are obtained from experiments. The embodiments were chosen and described in order to best explain the principles of the disclosure and its practical applications, to thereby enable others skilled in the art to best utilize the disclosure and various embodiments with various modifications as are suited to the particular use contemplated. The embodiments depicted above and the appended drawings are exemplary and are not intended to be exhaustive or to limit the scope of the present disclosure to the precise forms disclosed. Many modifications and variations are possible in view of the above teachings.