Imaging lens module, imaging lens drive module and electronic devices

Abstract

An imaging lens module, an imaging lens drive module, and an electronic device are disclosed. The imaging lens module includes an imaging lens, a light-deflecting element, a first lens barrel, a second lens barrel, a base, and multiple rolling bearings. The imaging lens defines a first optical axis through multiple plastic lenses. The light-deflecting element directs light rays along a second optical axis into the imaging lens and then deflects the light rays along the first optical axis. The first and second lens barrels house the plastic lenses. The first and second lens barrels are supported on the base. Rolling bearings are respectively disposed between the first lens barrel and the base and between the second lens barrel and the base, such that both the first and second lens barrels are movable relative to the base and along the first optical axis. The base includes a guide groove structure facing the first and second lens barrels, and the rolling bearings are disposed within the guide groove structure. This improves image quality.

Description

Technical Field

[0001] This disclosure relates to an imaging lens module and an imaging lens driving module, and more particularly to an imaging lens module and an imaging lens driving module used in a portable electronic device. Background Technology

[0002] In recent years, portable electronic devices have developed rapidly, such as smart devices and tablets, which have become ubiquitous in modern life. Consequently, imaging lens modules and imaging lens driver modules mounted on these devices have also flourished. However, as technology advances, users' demands for the quality of imaging lens modules and imaging lens driver modules are also increasing. Therefore, developing imaging lens modules and imaging lens driver modules that can improve image quality has become an important and urgent problem for the industry. Summary of the Invention

[0003] This disclosure provides an imaging lens module, an imaging lens drive module, and an electronic device that reduces the possibility of coaxiality deviation and mechanical assembly tolerance between the first and second lens barrels through the same guide groove structure, thereby improving imaging quality.

[0004] According to one embodiment of this disclosure, an imaging lens module is provided, comprising an imaging lens, a light-deflecting element, a first lens barrel, a second lens barrel, a base, and a plurality of rolling bearings. The imaging lens includes a plurality of plastic lenses and defines a first optical axis passing through the plastic lenses. The light-deflecting element is used to allow light rays to enter the light-deflecting element along a second optical axis and deflect the light rays along the first optical axis into the imaging lens. The first lens barrel houses at least one of the plastic lenses. The second lens barrel houses at least another plastic lens. The first and second lens barrels are supported on the base. Rolling bearings are respectively disposed between the first lens barrel and the base and between the second lens barrel and the base, such that both the first and second lens barrels are movable relative to the base and along the first optical axis. The base includes a guide groove structure facing the first and second lens barrels, and the guide groove structure extends in a direction parallel to the first optical axis. The rolling bearings disposed between the first and base and between the second and base are both disposed within the guide groove structure. The imaging lens module may further include a first magnet group. The first magnet assembly is fixed to the first lens barrel, and the first magnet assembly includes a first sensing magnet and a first magnet. The first sensing magnet and the first magnet are arranged opposite to each other relative to the first optical axis. The first sensing magnet is correspondingly arranged with a first sensing element, and the first magnet is used to drive the first lens barrel. The imaging lens module also includes a coil element, which is arranged opposite to the first sensing element relative to the first optical axis.

[0005] According to the imaging lens module of the embodiment described above, the imaging lens module may further include a second magnet group. The second magnet group is fixed on the second lens barrel, and the second magnet group includes two magnets, which are arranged opposite to each other relative to the first optical axis. One of the magnets in the second magnet group is a second sensing magnet, which is correspondingly arranged with a second Hall sensing element, and the second Hall sensing element is used to detect the displacement of the second lens barrel along the direction of the first optical axis.

[0006] According to the imaging lens module of the embodiment described above, the imaging lens module may further include a flexible printed circuit board, wherein the first sensing element is a first Hall sensing element, and the first Hall sensing element and the second Hall sensing element are respectively soldered on the flexible printed circuit board.

[0007] According to the imaging lens module of the embodiment described above, the imaging lens module may further include a third Hall sensing element, wherein the third Hall sensing element is used to detect the displacement of the first lens barrel moving along the direction of the first optical axis.

[0008] According to the imaging lens module of the embodiment described above, the first sensing element is a first Hall sensing element, and the first Hall sensing element and the third Hall sensing element can be arranged in a direction parallel to the first optical axis.

[0009] According to the imaging lens module of the embodiment described above, the imaging lens module may further include a fourth Hall sensing element, wherein the fourth Hall sensing element is used to detect the displacement of the second lens barrel moving along the direction of the first optical axis.

[0010] According to the imaging lens module of the embodiment described above, the second Hall sensing element and the fourth Hall sensing element can be arranged in a direction parallel to the first optical axis.

[0011] According to the imaging lens module of the embodiment described above, the imaging lens module may further include a frame element, wherein the frame element is used to support the flexible printed circuit board and is supported on the base.

[0012] According to one embodiment of the present disclosure, an electronic device is provided, comprising an imaging lens module of the aforementioned embodiment and an electronic photosensitive element, wherein the electronic photosensitive element is used to convert light passing through the imaging lens into an image signal.

[0013] According to one embodiment of this disclosure, an imaging lens driving module is provided. The imaging lens driving module is used to drive a plurality of plastic lenses of an imaging lens to move along a first optical axis of the imaging lens, and includes a light-deflecting element, a first lens barrel, a second lens barrel, a coil element, a first magnet, and a second magnet. The light-deflecting element is used to allow light to enter the light-deflecting element along a second optical axis and deflect the light to enter the imaging lens along the first optical axis. The first lens barrel houses at least one of the plastic lenses. The second lens barrel houses at least another plastic lens. The coil element includes a plurality of coils, wherein the coils are electrically separated from each other and arranged in a direction parallel to the first optical axis. The first magnet is fixed to the first lens barrel. The second magnet is fixed to the second lens barrel. The first magnet and the second magnet are arranged in a direction parallel to the first optical axis. The coil element corresponds to both the first magnet and the second magnet. The imaging lens driving module may further include a first magnet group. The first magnet assembly is fixed to the first lens barrel, and the first magnet assembly includes a first sensing magnet and a first magnet. The first sensing magnet and the first magnet are arranged opposite to each other relative to the first optical axis. The first sensing magnet is correspondingly arranged with a first sensing element, and the first magnet is used to drive the first lens barrel. The coil element and the first sensing element are arranged opposite to each other relative to the first optical axis.

[0014] According to the imaging lens driving module of the embodiment described above, the coil element may further include a flexible printed circuit board, and each coil is soldered onto the flexible printed circuit board.

[0015] According to the imaging lens driving module of the embodiment described above, the imaging lens driving module may further include a second sensing element, wherein the first sensing element and the second sensing element are respectively used to detect the displacement of the first lens barrel and the second lens barrel moving along the direction of the first optical axis, and the first sensing element and the second sensing element are each soldered on a flexible printed circuit board.

[0016] According to the imaging lens driving module of the embodiment described above, the coil element and the second sensing element can be arranged opposite to each other relative to the first optical axis.

[0017] According to the imaging lens driving module of the embodiment described above, the first sensing element and the second sensing element can be arranged in a direction parallel to the first optical axis.

[0018] According to the imaging lens driving module of the embodiment described above, the imaging lens driving module may further include a third sensing element and a fourth sensing element, wherein the third sensing element and the fourth sensing element are respectively used to detect the displacement of the first lens barrel and the second lens barrel moving along the direction of the first optical axis.

[0019] According to the imaging lens driving module of the embodiment described above, the first sensing element and the third sensing element maintain a specific optical axis distance d1 along the first optical axis, which can satisfy the following condition: 0.2 mm < d1 < 8 mm.

[0020] According to the imaging lens driving module of the embodiment described above, the second sensing element and the fourth sensing element maintain a specific optical axis distance d2 along the first optical axis, which can satisfy the following condition: 0.2 mm < d2 < 8 mm. Attached Figure Description

[0021] Figure 1A An exploded view of an electronic device according to a first embodiment of the present invention is shown;

[0022] Figure 1B Drawing according to Figure 1A Another exploded view of the electronic device in the first embodiment;

[0023] Figure 1C Drawing according to Figure 1A A further exploded view of the electronic device in the first embodiment;

[0024] Figure 1D Drawing according to Figure 1A Another exploded view of the electronic device in the first embodiment;

[0025] Figure 1E Drawing according to Figure 1A A schematic diagram of the optical surface of the imaging lens in the first embodiment;

[0026] Figure 2A A schematic diagram of an electronic device according to a second embodiment of the present invention is shown;

[0027] Figure 2B Drawing according to Figure 2A Another schematic diagram of the electronic device in the second embodiment;

[0028] Figure 2C Drawing according to Figure 2A A schematic diagram of an image captured by the ultra-wide-angle imaging device in the second embodiment;

[0029] Figure 2D Drawing according to Figure 2A A schematic diagram of an image captured by the wide-angle imaging device in the second embodiment; and

[0030] Figure 2E Drawing according to Figure 2A A schematic diagram of an image captured by a telescopic imaging device in the second embodiment.

[0031] [Symbol Explanation]

[0032] 10,20: Electronic devices

[0033] 111, 112, 113, 114, 115, 116, 117, 118, 119: Plastic lenses

[0034] 120: Light-transforming element

[0035] 131: First Lens Tube

[0036] 132: Second tube

[0037] 141: Coil

[0038] 142: Flexible Printed Circuit Board

[0039] 143: Frame Components

[0040] 144: Auxiliary coil element

[0041] 150: Base

[0042] 151: Guide trench structure

[0043] 152: Ferromagnetic flat plate

[0044] 160: Rolling bearing

[0045] 171: First sensing magnet

[0046] 172: The First Lodestone

[0047] 173: First sensing element

[0048] 174: Third sensing element

[0049] 175: Fifth sensing element

[0050] 181: Second sensing magnet

[0051] 182: Second Magnet

[0052] 183: Second sensing element

[0053] 184: Fourth sensing element

[0054] 185: Sixth Sensing Element

[0055] 191: Filter element

[0056] 192: Imaging plane

[0057] 193: Electronic photosensitive element

[0058] 21: Display device

[0059] 221, 222, 223: Wide-angle imaging device

[0060] 231, 232, 233: Ultra-wide-angle imaging device

[0061] 241,242: TOF module

[0062] 251, 252, 253, 254: Telescopic image acquisition device

[0063] 26: Flash module

[0064] X1: First optical axis

[0065] X2: Second optical axis

[0066] d1, d2: Specific optical axis distance Detailed Implementation

[0067] The imaging lens module includes an imaging lens, a light-deflecting element, a first lens barrel, a second lens barrel, a base, and multiple rolling bearings. The imaging lens includes multiple plastic lenses and defines a first optical axis passing through the plastic lenses. The light-deflecting element allows light rays to enter along a second optical axis and deflects the light rays along the first optical axis into the imaging lens. The first lens barrel houses at least one of the plastic lenses. The second lens barrel houses at least another plastic lens. The first and second lens barrels are supported on the base. Rolling bearings are respectively disposed between the first lens barrel and the base, and between the second lens barrel and the base, such that both the first and second lens barrels are movable relative to the base and along the first optical axis. The base includes a guide groove structure facing the first and second lens barrels, and the guide groove structure extends continuously along a direction parallel to the first optical axis. The rolling bearings disposed between the first and base and between the second and base are both located within the guide groove structure.

[0068] Furthermore, both the first and second lens barrels can be made of plastic, and the light-deflecting element can be a mirror or a prism. In this invention, the guide groove structure of the base extends in a straight line, providing the first and second lens barrels with freedom of movement along the first optical axis. This reduces the possibility of coaxiality deviation and mechanical assembly tolerances arising from using different guide groove structures for the first and second lens barrels. The cumulative effect of coaxiality deviation and mechanical assembly tolerances can lead to a decrease in the overall imaging quality of the imaging lens module.

[0069] The imaging lens module may further include a first magnet group. The first magnet group is fixed to the first lens barrel and includes two magnets arranged opposite to each other relative to the first optical axis. One of the magnets in the first magnet group is a first sensing magnet, corresponding to a first Hall sensor element, which is used to detect the displacement of the first lens barrel along the first optical axis. Specifically, the magnets may be a sensing magnet and a driving magnet. This avoids the additional magnetic field generated when a coil element carries current from affecting the first Hall sensor element and prevents signal interpretation distortion.

[0070] The imaging lens module may further include a second magnet group. The second magnet group is fixed to the second lens barrel and includes two magnets arranged opposite each other relative to the first optical axis. One of the magnets in the second magnet group is a second sensing magnet, corresponding to a second Hall effect sensing element, which detects the displacement of the second lens barrel along the first optical axis. This dual-detection mechanism accelerates the overall optical imaging operation time for zooming and focusing of the imaging lens. Furthermore, the effect of shortening the optical imaging operation time is more significant for optical systems with long travel distances. Specifically, "long travel distance" can be defined as a single lens barrel travel distance exceeding 0.3 mm to 0.5 mm and less than 9 mm to 12 mm, but is not limited thereto. The first lens barrel travel distance of this invention is approximately 2.5 mm to 6 mm, and the second lens barrel travel distance is approximately 2 mm to 5 mm.

[0071] The imaging lens module may also include a flexible printed circuit board, wherein the first Hall sensor element and the second Hall sensor element are each soldered onto the flexible printed circuit board. The bendable nature of the flexible printed circuit board allows for more flexibility in circuit design, which helps to reduce the overall size of the imaging lens module and reduce the complexity of the mechanism.

[0072] The imaging lens module may further include a third Hall sensor element, which is used to detect the displacement of the first lens barrel along the first optical axis. Detecting the displacement of the first lens barrel along the first optical axis using both the first and third Hall sensor elements provides better accuracy for longer movement distances. For example, before the detection distance becomes too long and affects the sensitivity of the first Hall sensor element, the third Hall sensor element can take over from the first Hall sensor element, avoiding impact on the first Hall sensor element's detection sensitivity and optimizing the efficiency of the detection signal and computational correction.

[0073] The first Hall sensor element and the third Hall sensor element can be arranged along a direction parallel to the first optical axis. In detail, the detection signal strength of the first Hall sensor element and the detection signal strength of the third Hall sensor element can be used to find a more accurate position of the first lens barrel using an analog IC calculation method with zero-point detection. The analog IC calculation method can be differential amplifier, positive edge-trigger, negative edge-trigger, etc., but is not limited to these.

[0074] The imaging lens module may further include a fourth Hall sensor element, which is used to detect the displacement of the second lens barrel along the first optical axis. Detecting the displacement of the second lens barrel along the first optical axis using both the second and fourth Hall sensor elements provides better accuracy for longer movement distances. For example, before the detection distance becomes too long and affects the sensitivity of the second Hall sensor element, the fourth Hall sensor element can take over, avoiding impact on the detection sensitivity of the second Hall sensor element and optimizing the efficiency of the detection signal and computational correction.

[0075] The second Hall sensing element and the fourth Hall sensing element can be arranged in a direction parallel to the first optical axis. By arranging them in a direction parallel to the first optical axis, the analog signal processing efficiency with low error can be maintained, and errors in the horizontal reference potential between the two signals can be avoided from affecting the interpretation of position detection.

[0076] The imaging lens module may also include a frame element that supports a flexible printed circuit board and rests on a base. Specifically, both the frame element and the base can be made of plastic. By manufacturing the frame element and the base separately, the dimensional accuracy of both the base and the frame element can be improved, and molding defects such as warping, severe shrinkage, or insufficient dimensional accuracy stability of the plastic can be reduced. This helps maintain the collimation of the guide groove structure and a high degree of collimation between the first and second lens barrels.

[0077] The various technical features in the imaging lens module disclosed above can be combined and configured to achieve the corresponding effects.

[0078] This disclosure provides an electronic device comprising the aforementioned imaging lens module and an electronic photosensitive element, wherein the electronic photosensitive element is used to convert light passing through the imaging lens into an image signal.

[0079] This disclosure provides an imaging lens driving module for driving a plurality of plastic lenses of an imaging lens to move along a first optical axis of the imaging lens, and includes a light-deflecting element, a first lens barrel, a second lens barrel, a coil element, a first magnet, and a second magnet. The light-deflecting element allows light rays to enter along a second optical axis and deflects the light rays along the first optical axis into the imaging lens. The first lens barrel houses at least one of the plastic lenses. The second lens barrel houses at least another plastic lens. The coil element includes a plurality of coils electrically separated from each other and arranged parallel to the first optical axis. The first magnet is fixed to the first lens barrel. The second magnet is fixed to the second lens barrel. The first and second magnets are arranged parallel to the first optical axis. The coil element corresponds to both the first and second magnets.

[0080] Furthermore, the coil element corresponds to both the first magnet and the second magnet, and the coils within the coil element provide current to each, generating a driving force through electromagnetic interaction with the corresponding first and second magnets. This driving force propels the first and second lens barrels to move along the direction of the first optical axis.

[0081] The coil element may further include a flexible printed circuit board, wherein each coil is soldered onto the flexible printed circuit board. Specifically, the coil element may be coils electrically separated from each other and soldered onto the flexible printed circuit board.

[0082] The imaging lens driving module may further include a first sensing element and a second sensing element, wherein the first sensing element and the second sensing element are respectively used to detect the displacement of the first lens barrel and the second lens barrel along the direction of the first optical axis, and the first sensing element and the second sensing element are each soldered onto a flexible printed circuit board. This can accelerate the assembly speed of the first sensing element and the second sensing element and increase production speed.

[0083] The coil element and the first sensing element can be arranged opposite each other relative to the first optical axis. This avoids the additional magnetic field generated when the coil element carries current from affecting the first sensing element and prevents signal distortion. Furthermore, it improves the efficiency of the flexible printed circuit board, prevents the overall height of the imaging lens drive module from becoming excessive, and effectively achieves miniaturization.

[0084] The coil element and the second sensing element can be arranged opposite each other relative to the first optical axis. This avoids the additional magnetic field generated when the coil element carries current from affecting the second sensing element and prevents signal distortion. Furthermore, it improves the efficiency of the flexible printed circuit board, prevents the overall height of the imaging lens drive module from becoming excessive, and effectively achieves miniaturization.

[0085] The first sensing element and the second sensing element can be arranged in a direction parallel to the first optical axis. This simplifies the design of the first lens barrel and the second lens barrel, reduces the complexity of injection molding, improves the molding quality of the first and second lens barrels, and helps to speed up production.

[0086] The imaging lens driving module may further include a third sensing element and a fourth sensing element, wherein the third and fourth sensing elements are used to detect the displacement of the first and second lens barrels along the direction of the first optical axis, respectively. Specifically, the detection signal strength of the third and fourth sensing elements can be used to determine a more precise position of the first and second lens barrels using a zero-point detection analog IC calculation method. This analog IC calculation method can be differential amplification, positive edge triggering, negative edge triggering, etc., but is not limited to these. This provides more parameter sources for subsequent position detection error compensation or optimization of the imaging lens driving module.

[0087] The first and third sensing elements maintain a specific optical axis distance d1 along the first optical axis, satisfying the following conditions: 0.2 mm < d1 < 8 mm. Additionally, it satisfies the following condition: 0.7 mm < d1 < 6 mm. The second and fourth sensing elements maintain a specific optical axis distance d2 along the first optical axis, satisfying the following conditions: 0.2 mm < d2 < 8 mm. Additionally, it satisfies the following condition: 0.7 mm < d2 < 6 mm. By maintaining values ​​within the specific range of d1 and d2, the sensitivity of position detection can be maintained. When the values ​​of d1 and d2 are too small, the similarity between the two signals will be too high, making the simulation results less reliable; when the values ​​of d1 and d2 are too large, the signal window period will be too long, and the accuracy of the detected position will be more prone to fluctuation.

[0088] The various technical features in the imaging lens driving module disclosed above can be combined and configured to achieve the corresponding effects.

[0089] Based on the above implementation methods, specific embodiments are presented below and described in detail with reference to the accompanying drawings.

[0090] <First Embodiment>

[0091] Please refer to Figures 1A to 1D ,in Figures 1A to 1D Exploded views of the electronic device 10 according to a first embodiment of the present invention are shown from different perspectives. Figures 1A to 1D It can be seen that the electronic device 10 includes an imaging lens module (not shown in the figure) and an electronic photosensitive element 193 (such as...). Figure 1E As shown in the figure, the electronic photosensitive element 193 is used to convert a light passing through the imaging lens into an image signal.

[0092] Furthermore, the imaging lens module includes an imaging lens drive module (not shown in the figure), an imaging lens (not shown in the figure), a base 150, and multiple rolling bearings 160.

[0093] The imaging lens drive module is used to drive the multiple plastic lenses 111 of the imaging lens (such as...). Figure 1E (as shown), 112, 113, 114 (as shown) Figure 1E As shown), 115 (as shown) Figure 1E As shown), 116 (as shown) Figure 1E As shown), 117, 118, and 119 move along the direction of a first optical axis X1 of the imaging lens and include a light deflection element 120, a first lens barrel 131, a second lens barrel 132, a coil element (not shown), a first magnet 172, a second magnet 182, a first sensing element 173, and a second sensing element 183.

[0094] Please refer to the following: Figure 1E Its drawing is based on Figure 1A A schematic diagram of the optical surface of the imaging lens in the first embodiment. (From...) Figure 1E As can be seen, the imaging lens includes multiple plastic lenses 111, 112, 113, 114, 115, 116, 117, 118, and 119, and a filter element 191. A first optical axis X1 can be defined to pass through the plastic lenses 111, 112, 113, 114, 115, 116, 117, 118, and 119. An electronic photosensitive element 193 is disposed on an imaging surface 192 of the imaging lens, and the filter element 191 is disposed between the plastic lens 119 and the imaging surface 192. It must be noted that the number, structure, surface shape, and other optical characteristics of the plastic lenses can be configured according to different imaging requirements, and other optical elements can also be added as needed; this is not a limitation.

[0095] Specifically, plastic lens 111 is located on the object side of the imaging lens, while plastic lens 119 is located on the image side of the imaging lens. Light-deflecting element 120 is located on the object side of plastic lens 111, and is used to direct light rays along a second optical axis X2 into the imaging lens, and then deflect the light rays along a first optical axis X1. Furthermore, light-deflecting element 120 can be a mirror or a prism.

[0096] The first lens barrel 131 houses at least one of the plastic lenses 111, 112, 113, 114, 115, 116, 117, 118, and 119, while the second lens barrel 132 houses at least another of the plastic lenses 111, 112, 113, 114, 115, 116, 117, 118, and 119. In the first embodiment, both the first lens barrel 131 and the second lens barrel 132 can be plastic lens barrels, with the first lens barrel 131 housing plastic lenses 113, 114, and 115, and the second lens barrel 132 housing plastic lenses 116 and 117, but this is not a limitation.

[0097] The first lens barrel 131 and the second lens barrel 132 are supported on the base 150, and the base 150 includes a guide groove structure 151, wherein the guide groove structure 151 faces the first lens barrel 131 and the second lens barrel 132, and the guide groove structure 151 extends continuously along a direction parallel to the first optical axis X1.

[0098] Rolling bearings 160 are respectively disposed between the first lens barrel 131 and the base 150 and between the second lens barrel 132 and the base 150, such that both the first lens barrel 131 and the second lens barrel 132 are movable relative to the base 150 and along the first optical axis X1. The rolling bearings 160 disposed between the first lens barrel 131 and the base 150 and between the second lens barrel 132 and the base 150 are both disposed within the guide groove structure 151. In the first embodiment, the number of rolling bearings 160 is eight, but this is not a limitation.

[0099] In detail, in the first embodiment, the guide groove structure 151 of the base 150 extends in a straight strip shape, while providing the first lens barrel 131 and the second lens barrel 132 with the freedom to move along the first optical axis X1. This reduces the possibility of coaxiality deviation and mechanical assembly tolerances caused by the use of different guide groove structures for the first lens barrel 131 and the second lens barrel 132. The cumulative effect of coaxiality deviation and mechanical assembly tolerance can lead to a decrease in the overall imaging quality of the imaging lens module.

[0100] The imaging lens module also includes a first magnet group (not shown). The first magnet group is fixed to the first lens barrel 131 and includes two magnets arranged opposite each other relative to the first optical axis X1. One magnet in the first magnet group is a first sensing magnet 171, and the other is a first magnet 172. The first sensing magnet 171 and the first magnet 172 are fixed to the first lens barrel 131. The first sensing magnet 171 is correspondingly arranged with a first sensing element 173, and the first sensing element 173 is used to detect the displacement of the first lens barrel 131 along the direction of the first optical axis X1. Specifically, the first sensing magnet 171 is used to sense the displacement of the first lens barrel 131, and the first magnet 172 is used to drive the first lens barrel 131. This avoids the additional magnetic field generated when the coil element carries current from affecting the first sensing element 173 and avoids signal interpretation distortion.

[0101] The imaging lens module also includes a second magnet group (not shown). The second magnet group is fixed to the second lens barrel 132 and includes two magnets arranged opposite each other relative to the first optical axis X1. One magnet in the second magnet group is a second sensing magnet 181, and the other is a second magnet 182. The second sensing magnet 181 and the second magnet 182 are fixed to the second lens barrel 132. The second sensing magnet 181 is correspondingly arranged with a second sensing element 183, and the second sensing element 183 is used to detect the displacement of the second lens barrel 132 along the direction of the first optical axis X1. Specifically, the second sensing magnet 181 is used to sense the displacement of the second lens barrel 132, and the second magnet 182 is used to drive the second lens barrel 132. Through this dual-detection mechanism, the overall optical imaging operation time for zooming and focusing of the imaging lens can be accelerated. Furthermore, for optical systems with long travel distances, the effect of shortening the optical imaging operation time is even more significant.

[0102] It is worth mentioning that "long stroke" can be an actuation distance of a single lens tube exceeding 0.3 mm to 0.5 mm and less than 9 mm to 12 mm, but is not limited thereto. In the first embodiment, the actuation distance of the first lens tube 131 is approximately 2.5 mm to 6 mm, and the actuation distance of the second lens tube 132 is approximately 2 mm to 5 mm.

[0103] The coil element comprises multiple coils 141, which are electrically separated from each other and arranged along a direction parallel to the first optical axis X1. Further, a first magnet 172 and a second magnet 182 are arranged along the same direction, and the coil element corresponds to both the first magnet 172 and the second magnet 182. Specifically, the coils 141 within the coil element provide current and generate a driving force through electromagnetic interaction with their corresponding first magnets 172 and second magnets 182. This driving force propels the first lens barrel 131 and the second lens barrel 132 to move along the first optical axis X1.

[0104] The coil element also includes a flexible printed circuit board 142, on which each coil 141 is soldered, and the first sensing element 173 and the second sensing element 183 are also soldered. The bendable nature of the flexible printed circuit board 142 allows for greater flexibility in circuit design, contributing to the miniaturization of the overall imaging lens module and reducing structural complexity. Specifically, the coil element can be composed of electrically separate coils 141 soldered together on the flexible printed circuit board 142. This accelerates the assembly of the first sensing element 173 and the second sensing element 183 and increases production speed.

[0105] The coil element and the first sensing element 173 are arranged opposite each other with respect to the first optical axis X1, and the coil element and the second sensing element 183 are also arranged opposite each other with respect to the first optical axis X1. This avoids the additional magnetic field generated when the coil element carries current from affecting the first sensing element 173 and the second sensing element 183, and prevents signal interpretation distortion. Furthermore, it improves the utilization efficiency of the flexible printed circuit board 142, prevents the overall height of the imaging lens drive module from becoming excessive, and effectively achieves miniaturization.

[0106] The first sensing element 173 and the second sensing element 183 are arranged along a direction parallel to the first optical axis X1. This simplifies the design of the mechanism of the first lens barrel 131 and the mechanism of the second lens barrel 132, reduces the complexity of injection molding, improves the molding quality of the first lens barrel 131 and the second lens barrel 132, and helps to speed up production.

[0107] Depend on Figure 1A and Figure 1CIt is understood that the imaging lens driving module also includes a third sensing element 174 and a fourth sensing element 184. The third sensing element 174 and the fourth sensing element 184 are used to detect the displacement of the first lens barrel 131 and the second lens barrel 132 along the direction of the first optical axis X1, respectively. The first sensing element 173, the second sensing element 183, the third sensing element 174, and the fourth sensing element 184 are arranged in a direction parallel to the first optical axis X1. Specifically, the detection signal strengths of the first sensing element 173, the second sensing element 183, the third sensing element 174, and the fourth sensing element 184 can be used to find a more precise position of the first lens barrel 131 and the second lens barrel 132 using a zero-point detection analog IC calculation method. The analog IC calculation method can be differential amplification, positive edge triggering, negative edge triggering, etc., but is not limited to these. This provides more parameter sources for subsequent position detection error compensation or optimization of the imaging lens driving module. Furthermore, by aligning the signals parallel to the first optical axis X1, the computational efficiency of the analog signals can be maintained with lower errors, and errors in the horizontal reference potential between the two signals can be avoided, which would affect the interpretation of the position detection.

[0108] Furthermore, by detecting the displacement of the first lens barrel 131 along the first optical axis X1 using the first sensing element 173 and the third sensing element 174, the detection accuracy is better for longer movement distances. For example, before the detection distance becomes too long and affects the detection sensitivity of the first sensing element 173, the third sensing element 174 can take over from the first sensing element 173, thus avoiding affecting the detection sensitivity of the first sensing element 173 and optimizing the efficiency of the detection signal and the calculation correction.

[0109] Furthermore, by detecting the displacement of the second lens barrel 132 along the first optical axis X1 using the second sensing element 183 and the fourth sensing element 184, the detection accuracy is better for longer movement distances. For example, before the detection distance becomes too long and affects the detection sensitivity of the second sensing element 183, the fourth sensing element 184 can take over from the second sensing element 183, thus avoiding affecting the detection sensitivity of the second sensing element 183 and optimizing the efficiency of the detection signal and the calculation correction.

[0110] It is worth mentioning that the first sensing element 173 can be a first Hall sensor, the second sensing element 183 can be a second Hall sensor, the third sensing element 174 can be a third Hall sensor, and the fourth sensing element 184 can be a fourth Hall sensor, but these are not limited to these. The number of sensing elements (in the first embodiment, the sensing elements are the first sensing element 173, the second sensing element 183, the third sensing element 174, the fourth sensing element 184, the fifth sensing element 175, and the sixth sensing element 185, respectively) can be adaptively adjusted according to the actuation distance of the first lens barrel 131 and the actuation distance of the second lens barrel 132. When the actuation distance is short, the number of sensing elements can be reduced; when the actuation distance is long, the number of sensing elements can be increased.

[0111] The imaging lens module also includes a frame element 143 for supporting the flexible printed circuit board 142 and mounting it on the base 150. Both the frame element 143 and the base 150 can be made of plastic. By manufacturing the frame element 143 and the base 150 separately, the dimensional accuracy of the base 150 and the frame element 143 can be improved respectively, and molding defects such as warping, severe shrinkage, or insufficient dimensional accuracy stability of the plastic can be reduced. This helps maintain the collimation of the guide groove structure 151 and maintains a high degree of collimation between the first lens barrel 131 and the second lens barrel 132.

[0112] Depend on Figures 1A to 1C It is understood that the imaging lens driving module also includes an auxiliary coil element 144, wherein the auxiliary coil element 144 and the coil element are arranged opposite to each other relative to the first optical axis X1. Specifically, the auxiliary coil element 144 can provide the imaging lens driving module with additional driving force and configuration design margin. The first sensing element 173, the second sensing element 183, the third sensing element 174, the fourth sensing element 184, the fifth sensing element 175 and the sixth sensing element 185 can be respectively arranged opposite to each other relative to the first optical axis X1 corresponding to the coil 141.

[0113] Depend on Figure 1C and Figure 1D It is known that the base 150 also includes a ferromagnetic plate 152, wherein the ferromagnetic plate 152 corresponds to the first sensing magnet 171 and the first magnet 172 of the first magnet group, and the second sensing magnet 181 and the second magnet 182 of the second magnet group correspond to the ferromagnetic plate 152.

[0114] Two of the rolling bearings 160 are disposed between the second sensing magnet 181 and the second magnet 182 of the second magnet group along the circumferential direction surrounding the first optical axis X1.

[0115] Depend on Figure 1CIt is known that the first sensing element 173 and the third sensing element 174 maintain a specific optical axis distance d1 along the first optical axis X1, and the second sensing element 183 and the fourth sensing element 184 maintain a specific optical axis distance d2 along the first optical axis X1. The parameters satisfy the conditions in Table 1 below.

[0116]

[0117] <Second Embodiment>

[0118] Please refer to Figure 2A and Figure 2B , Figure 2A A schematic diagram of the electronic device 20 according to a second embodiment of the present invention is shown. Figure 2B Drawing according to Figure 2A Another schematic diagram of the electronic device 20 in the second embodiment. (From...) Figure 2A and Figure 2B It is known that the electronic device 20 is a smartphone, and the electronic device 20 includes an imaging lens module, an electronic photosensitive element (not shown), multiple image capturing devices and a display device 21, wherein the electronic photosensitive element is used to convert a light passing through the imaging lens into an image signal.

[0119] In the second embodiment, the imaging lens modules are telescopic image-capturing devices 253 and 254, and the image-capturing devices are wide-angle image-capturing devices 221, 222, 223, ultra-wide-angle image-capturing devices 231, 232, 233, TOF modules (Time-Of-Flight) 241, 242, and telescopic image-capturing devices 251, 252. The TOF modules 241, 242 can also be other types of image-capturing devices, and the configuration is not limited to this. Specifically, the imaging lens module can be the same as the imaging lens module in the first embodiment, and the telescopic image-capturing devices 253, 254 are used to deflect light, but this disclosure is not limited to this.

[0120] In detail, in the second embodiment, the wide-angle image capturing device 221, the ultra-wide-angle image capturing device 231 and the TOF module 241 are disposed on the front of the electronic device 20, while the wide-angle image capturing devices 222 and 223, the ultra-wide-angle image capturing devices 232 and 233, the TOF module 242 and the telephoto image capturing devices 251, 252, 253 and 254 are disposed on the back of the electronic device 20.

[0121] The display device 21 can be a touch screen, used to display images and has touch functionality. It can also be used to manually adjust the shooting angle to switch between wide-angle imaging devices 221, 222, 223, ultra-wide-angle imaging devices 231, 232, 233, and telephoto imaging devices 251, 252, 253, 254. At this time, an imaging lens (not shown) of the imaging lens module gathers light onto the electronic photosensitive element and outputs an image signal to the image signal processor (ISP) (not shown).

[0122] Depending on the camera specifications of the electronic device 20, the electronic device 20 may also include an optical image stabilization component (not shown). Furthermore, the electronic device 20 may also include at least one focus assist module (not shown) and at least one sensing element (not shown). The focus assist module may be a color temperature compensated flash module 26, an infrared rangefinder, a laser focus module, etc. The sensing element may have the function of sensing physical momentum and kinetic energy, such as an accelerometer, gyroscope, or Hall effect element, to sense the shaking and tremors caused by the user's hand or the external environment. This facilitates the performance of the autofocus function and optical image stabilization component configured in the imaging lens of the electronic device 20, thereby obtaining good image quality. This helps the electronic device 20 according to the present disclosure to have multiple shooting modes, such as optimized Selfie, low-light HDR (High Dynamic Range) imaging, and high-resolution 4K video recording. In addition, users can directly view the camera's shooting screen from the display device 21 and manually operate the framing range on the display device 21 to achieve WYSIWYG autofocus.

[0123] Furthermore, the imaging lens, electronic image sensor, optical image stabilization assembly, sensing element, and focus assist module can be mounted on a flexible printed circuit board (FPC) (not shown) and electrically connected to imaging signal processing elements and other related components via a connector (not shown) to execute the shooting process. Current electronic devices, such as smartphones, are trending towards thinner and lighter designs. Mounting the imaging lens and related components on a flexible printed circuit board, and then using connectors to integrate the circuitry onto the mainboard of the electronic device, satisfies the structural design and circuit layout requirements of the limited internal space of the electronic device, providing greater flexibility. It also allows for more flexible control of the imaging lens's autofocus function through the device's touchscreen. In the second embodiment, the electronic device 20 may include multiple sensing elements and multiple focus assist modules. The sensing elements and focus assist modules are mounted on a flexible printed circuit board and at least one other flexible printed circuit board (not shown), and are electrically connected to imaging signal processing elements and other related components via corresponding connectors to execute the shooting process. In other embodiments (not shown), the sensing element and auxiliary optical element may also be mounted on the motherboard of the electronic device or other types of carrier boards, depending on the mechanical design and circuit layout requirements.

[0124] Furthermore, the electronic device 20 may further include, but is not limited to, a display unit, a control unit, a storage unit, random access memory (RAM), read-only memory (ROM), or a combination thereof.

[0125] Please refer to Figure 2C Its drawing is based on Figure 2A Schematic diagram of images captured by the ultra-wide-angle imaging devices 231, 232, and 233 in the second embodiment. Figure 2C It can be seen that ultra-wide-angle imaging devices 231, 232, and 233 can capture images of a larger range and have the function of accommodating more scenery.

[0126] Please refer to Figure 2D Its drawing is based on Figure 2A A schematic diagram of images captured by the wide-angle imaging devices 221, 222, and 223 in the second embodiment. Figure 2D It can be seen that the wide-angle imaging devices 221, 222, and 223 can capture images within a certain range and also have high pixel count, with high resolution and low distortion.

[0127] Please refer to Figure 2E Its drawing is based on Figure 2A Schematic diagram of images captured by the telescopic imaging devices 251, 252, 253, and 254 in the second embodiment. (By...) Figure 2EIt can be seen that the telescopic imaging devices 251, 252, 253, and 254 have high magnification functions, and can capture images at a distance and magnify them to a high degree.

[0128] Depend on Figures 2C to 2E It is understood that by using imaging lens modules and image capturing devices with different focal lengths for framing, and in conjunction with image processing technology, the electronic device 20 can achieve the function of zooming.

[0129] Although the present invention has been disclosed above by way of embodiments, it is not intended to limit the present invention. Anyone skilled in the art can make some modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the scope defined in the appended claims.

Claims

1. An imaging lens module, characterized in that, Include: An imaging lens comprising a plurality of plastic lenses, and defining a first optical axis passing through the plurality of plastic lenses; A light-deflecting element is used to allow a light ray to enter the light-deflecting element along a second optical axis and deflect the light ray to enter the imaging lens along the first optical axis; A first lens barrel, which houses at least one of the plurality of plastic lenses; A second lens barrel, which houses at least one of the plurality of plastic lenses; A base on which the first lens barrel and the second lens barrel are supported; as well as Multiple rolling bearings are respectively disposed between the first lens barrel and the base and between the second lens barrel and the base, so that both the first lens barrel and the second lens barrel are relative to the base and move along the first optical axis; The base includes a guide groove structure facing the first lens barrel and the second lens barrel, and the guide groove structure extends in a direction parallel to the first optical axis. The plurality of rolling bearings disposed between the first lens barrel and the base and the plurality of rolling bearings disposed between the second lens barrel and the base are all disposed within the guide groove structure; The imaging lens module further includes a first magnet group fixed on the first lens barrel, and the first magnet group includes a first sensing magnet and a first magnet. The first sensing magnet and the first magnet are arranged opposite to each other relative to the first optical axis. The first sensing magnet is correspondingly arranged with a first sensing element. The first magnet is used to drive the first lens barrel. The imaging lens module also includes a coil element, which is disposed opposite to the first sensing element relative to the first optical axis.

2. The imaging lens module according to claim 1, characterized in that, Also includes: A second magnet assembly is fixed to the second lens barrel, and the second magnet assembly includes two magnets, which are arranged opposite to each other relative to the first optical axis. One of the two magnets in the second magnet assembly is a second sensing magnet, which is correspondingly arranged with a second Hall sensing element. The second Hall sensing element is used to detect the displacement of the second lens barrel along the direction of the first optical axis.

3. The imaging lens module according to claim 2, characterized in that, Also includes: A flexible printed circuit board, wherein the first sensing element is a first Hall sensing element, and the first Hall sensing element and the second Hall sensing element are respectively soldered on the flexible printed circuit board.

4. The imaging lens module according to claim 2, characterized in that, Also includes: A third Hall effect sensor is used to detect the displacement of the first lens barrel along the direction of the first optical axis.

5. The imaging lens module according to claim 4, characterized in that, The first sensing element is a first Hall sensing element, and the first Hall sensing element and the third Hall sensing element are arranged in a direction parallel to the first optical axis.

6. The imaging lens module according to claim 2, characterized in that, Also includes: A fourth Hall effect sensor is used to detect the displacement of the second lens barrel along the direction of the first optical axis.

7. The imaging lens module according to claim 6, characterized in that, The second Hall sensing element and the fourth Hall sensing element are arranged in a direction parallel to the first optical axis.

8. The imaging lens module according to claim 3, characterized in that, Also includes: A frame element is used to support the flexible printed circuit board and support it on the base.

9. An electronic device, characterized in that, Include: The imaging lens module as described in claim 1; and An electronic photosensitive element is used to convert the light passing through the imaging lens into an image signal.

10. An imaging lens driving module, characterized in that, A plurality of plastic lenses for driving an imaging lens to move along a first optical axis of the imaging lens, and comprising: A light-deflecting element is used to allow a light ray to enter the light-deflecting element along a second optical axis and deflect the light ray to enter the imaging lens along the first optical axis; A first lens barrel, which houses at least one of the plurality of plastic lenses; A second lens barrel, which houses at least one of the plurality of plastic lenses; A coil element comprising a plurality of coils electrically separated from each other and arranged along a direction parallel to the first optical axis; A first magnet is fixed to the first lens tube; and A second magnet is fixed to the second lens barrel; The first magnet and the second magnet are arranged in a direction parallel to the first optical axis; The coil element corresponds to both the first magnet and the second magnet. The imaging lens driving module further includes a first magnet group fixed on the first lens barrel, and the first magnet group includes a first sensing magnet and the first magnet. The first sensing magnet and the first magnet are arranged opposite to each other relative to the first optical axis. The first sensing magnet is correspondingly arranged with a first sensing element. The first magnet is used to drive the first lens barrel. The coil element and the first sensing element are arranged opposite each other relative to the first optical axis.

11. The imaging lens driving module according to claim 10, characterized in that, The coil element also includes a flexible printed circuit board to which the plurality of coils are each soldered.

12. The imaging lens driving module according to claim 11, characterized in that, Also includes: A second sensing element; The first sensing element and the second sensing element are used to detect the displacement of the first lens barrel and the second lens barrel along the direction of the first optical axis, and the first sensing element and the second sensing element are respectively soldered on the flexible printed circuit board.

13. The imaging lens driving module according to claim 12, characterized in that, The coil element and the second sensing element are positioned opposite each other relative to the first optical axis.

14. The imaging lens driving module according to claim 12, characterized in that, The first sensing element and the second sensing element are arranged in a direction parallel to the first optical axis.

15. The imaging lens driving module according to claim 12, characterized in that, Also includes: A third sensing element; and A fourth sensing element; The third sensing element and the fourth sensing element are used to detect the displacement of the first lens barrel and the second lens barrel along the direction of the first optical axis, respectively.

16. The imaging lens driving module according to claim 15, characterized in that, The first sensing element and the third sensing element maintain a specific optical axial distance d1 along the first optical axis, which satisfies the following condition: 0.2 mm < d1 < 8 mm.

17. The imaging lens driving module according to claim 15, characterized in that, The second sensing element and the fourth sensing element maintain a specific optical axis distance d2 along the first optical axis, which satisfies the following condition: 0.2 mm < d2 < 8 mm.

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