Imaging lens driving module and electronic device

Abstract

An imaging lens driving module and an electronic device are disclosed. The imaging lens driving module includes a lens unit, a driving mechanism, a sensing mechanism and an imaging surface. The lens unit includes an imaging lens group. The driving mechanism is coupled at least partially with the lens unit to drive the lens unit to move along a direction parallel to an optical axis of the imaging lens group. The sensing mechanism includes a sensing magnet and a sensing element. The sensing magnet is fixed to the lens unit, at least a portion of the lens unit is disposed between the sensing magnet and the driving mechanism, and the sensing magnet does not face the driving mechanism. The sensing element is disposed on an image side of the imaging lens group and is disposed opposite to the sensing magnet, respectively. The sensing element is used to detect a relative position of the sensing magnet corresponding thereto, respectively. The imaging surface is disposed on the image side of the imaging lens group, and the optical axis passes through the imaging surface. The sensing mechanism is used to detect the relative position of the sensing magnet corresponding to the sensing element. The electronic device having the imaging lens driving module is also disclosed.

Description

[0001] This application is a divisional application of the original application with the application date of June 2, 2020, the original application number of 202010489220.0, and the original application title of Imaging Lens Driving Module and Electronic Device. TECHNICAL FIELD

[0002] The present application relates to an imaging lens driving module and an electronic device, in particular to an imaging lens driving module suitable for an electronic device. BACKGROUND

[0003] With the advancement of semiconductor process technology, the performance of electronic photosensitive elements has been improved, and the pixel size can be made smaller. Therefore, optical lenses with high imaging quality are indispensable. In addition, with the rapid development of technology, mobile devices equipped with optical lenses are more widely used, and the requirements for optical lenses are more diverse.

[0004] Generally, the lens can be moved by the driving of the lens driving device to perform auto-focusing. However, when the lens is tilted, the best imaging position of the imaging lens group and the imaging plane of the photosensitive element will be offset, resulting in poor imaging quality of the peripheral image. For example, please refer to Figure 1 , which shows a schematic diagram of the offset of the best imaging position BP and the imaging plane IM when the lens LS is tilted. From the modulation transfer function (MTF) distribution in Figure 1 , it can be seen that the tilt of the lens LS makes the imaging position distance of the peripheral light MR different from that of the chief ray CR, which will result in that the image near a certain range (for example, near the center of the image) is clear and the resolution is high, but in the area far from the certain range (for example, at the edge of the image), the resolution is low and the image is blurred. For example, the image of the original black and white edge of the object produces indeterminate gray-scale images between the black and white boundaries due to the offset of the focus position, thus forming a blurred image.

[0005] In the prior art, in order to solve the problem of image peripheral blurring caused by lens tilt, first, the contrast of the image is detected and analyzed, and then the tilt of the lens is calculated according to the analysis result, and subsequent compensation and correction are performed to make the image peripheral clear. For example, please refer to Figures 2 to 4 , which shows a schematic diagram of the determination process of the contrast detection and analysis of the image in the prior art. As Figure 2As shown, first, the image of the sampling points F1~F12 is retained by sampling the original image from the center to the periphery. Figure 3 Then, the contrast of each sampling point F1~F12 is detected, and the determinable and indeterminable sampling points are listed respectively as shown in Figure 4 Finally, the screen analysis is performed on the indeterminable sampling points (such as the sampling points F9~F12 in Figure 4 ), and the cause of the imaging blur, such as lens skew, assembly tolerance, etc., is derived according to the analysis result.

[0006] However, the way of indirectly calculating the lens skew degree by analyzing the image screen may have a large error and thus cause misjudgment. Therefore, how to improve the structure of the lens to accurately obtain the skew degree of the lens has become an important issue in the related field. SUMMARY

[0007] In view of the above-mentioned problems, the present application discloses an imaging lens driving module, which helps to solve the problem of misjudgment caused by a large error in the prior art by indirectly calculating the lens skew degree by analyzing the image screen.

[0008] The present application provides an imaging lens driving module, which comprises a lens unit, a driving mechanism, a sensing mechanism, and an imaging surface. The lens unit comprises an imaging lens group, and the imaging lens group has an optical axis. The driving mechanism is at least partially coupled with the lens unit to drive the lens unit to move in a direction parallel to the optical axis. The sensing mechanism comprises a plurality of sensing magnets and a plurality of sensing elements. The sensing magnets are fixed to the lens unit, and at least part of the lens unit is arranged between the sensing magnets and the driving mechanism, so that the sensing magnets do not face the driving mechanism. The sensing elements are arranged on the image side of the imaging lens group, the sensing elements are arranged opposite to the sensing magnets respectively, and the sensing elements are respectively used to detect the relative position of the sensing magnet corresponding thereto. The imaging surface has a central axis, the imaging surface is arranged on the image side of the imaging lens group, and the optical axis of the imaging lens group passes through the imaging surface. The sensing mechanism is used to detect the relative position of the sensing magnet corresponding to the sensing element. The shortest distance Da between each sensing magnet and the sensing element corresponding thereto in the direction parallel to the central axis satisfies the following condition:

[0009] 0 mm≤Da≤0.93 mm.

[0010] The present application provides an electronic device comprising the aforementioned imaging lens driving module.

[0011] According to the imaging lens driving module and electronic device disclosed in this invention, by setting a sensing mechanism in the imaging lens driving module, the relative position of the sensing element and the sensing magnet is detected, and then the tilt degree of the optical axis of the lens unit relative to the central axis of the imaging surface is detected, so as to obtain the tilt degree of the lens unit. This is beneficial for analyzing the focus blur area in the image, and the image quality can be improved after further optimization by changing the focus capture range of the photosensitive element.

[0012] Furthermore, when Da meets the above conditions, the shortest distance between the sensing magnet and the corresponding sensing element can be further narrowed to fall within the optimal operating range of the sensing element.

[0013] The foregoing description of the disclosure and the following description of the embodiments are intended to demonstrate and explain the spirit and principles of the present invention, and to provide a further explanation of the scope of the patent application of the present invention. Attached Figure Description

[0014] Figure 1 This diagram illustrates the focus position shift that occurs between the optimal imaging position and the imaging plane when a lens is tilted in the prior art.

[0015] Figures 2 to 4 A schematic diagram illustrating the judgment process of contrast detection and analysis of image images in the prior art.

[0016] Figure 5 A perspective view of an image-capturing device according to a first embodiment of the present invention is shown.

[0017] Figure 6 Draw Figure 5 An exploded view of the imaging device.

[0018] Figure 7 Draw Figure 5 An exploded view of the other side of the imaging device.

[0019] Figure 8 Draw Figure 5 A three-dimensional schematic diagram of the imaging lens drive module, electronic photosensitive element and base of the imaging device.

[0020] Figure 9 Draw Figure 8 A cross-sectional view of the imaging lens drive module, electronic photosensitive element and base along the A-A' section line.

[0021] Figure 10 Draw Figure 8 A cross-sectional view of the imaging lens drive module, electronic photosensitive element and base along the B-B' section line.

[0022] Figure 11 Draw Figure 5FIG. 4 is a side view cross-sectional schematic diagram of the image capturing device of FIG. 1 along a C-C' cross-sectional line.

[0023] Figure 12 FIG. 5 is a perspective view schematic diagram of the image capturing device of FIG. 1. Figure 5

[0024] Figure 13 FIG. 6 is a perspective view schematic diagram of the image capturing device of FIG. 1. Figure 8

[0025] Figure 14 FIG. 7 is a perspective view schematic diagram of the image capturing device of FIG. 1.

[0026] Figure 15 FIG. 8 is an exploded schematic diagram of the image capturing device of FIG. 1. Figure 14

[0027] Figure 16 FIG. 9 is another exploded schematic diagram of the image capturing device of FIG. 1. Figure 14

[0028] Figure 17 FIG. 10 is a perspective view schematic diagram of the image capturing device of FIG. 1. Figure 14

[0029] Figure 18 FIG. 11 is a cross-sectional schematic diagram of the image capturing device of FIG. 1 along an E-E' cross-sectional line. Figure 17

[0030] Figure 19 FIG. 12 is a cross-sectional schematic diagram of the image capturing device of FIG. 1 along an F-F' cross-sectional line. Figure 17

[0031] Figure 20 FIG. 13 is a side view cross-sectional schematic diagram of the image capturing device of FIG. 1 along a G-G' cross-sectional line. Figure 14

[0032] Figure 21 FIG. 14 is a side view cross-sectional schematic diagram of the image capturing device of FIG. 1 along an H-H' cross-sectional line. Figure 14

[0033] Figure 22 FIG. 15 is a side view cross-sectional schematic diagram of the image capturing device of FIG. 1. Figure 17

[0034] Figure 23 FIG. 16 is a perspective view schematic diagram of the image capturing device of FIG. 1.

[0035] Figure 24 ​​​​​​​​​​Fig. 1 shows a schematic view of an image capturing device according to the present application.

[0036] Figure 25 Fig. 2 shows a schematic view of another image capturing device according to the present application.

[0037] Figure 26 Fig. 3 shows a perspective view of one side of an electronic device according to a fourth embodiment of the present application.

[0038] Figure 27 Fig. 4 shows a perspective view of the other side of the electronic device of Figure 26

[0039] Figure 28 Fig. 5 shows a system block diagram of the electronic device of Figure 26

[0040] Figure 29 Fig. 6 shows a schematic view of another electronic device according to the present application.

[0041] Legend:

[0042] LS... lens

[0043] BP... imaging position

[0044] IM... imaging surface

[0045] MR... marginal ray

[0046] CR... chief ray

[0047] F1-F12... sampling points

[0048] Da... shortest distance of the respective sensing magnet and its corresponding sensing element in the direction parallel to the center axis

[0049] ΦD... maximum outer diameter of the outer diameter of the optical lens

[0050] d... shortest distance between the two sensing magnets

[0051] OL... optical axis

[0052] CL... center axis

[0053] h... height of the respective sensing element in the direction parallel to the center axis

[0054] 1, 3... imaging lens drive module

[0055] 13, 33... lens unit

[0056] 130, 330... imaging lens group

[0057] 131, 331... optical lens ​​

[0058] 131a, 331a... largest outer diameter optical lens

[0059] 131b, 331b... remaining optical lens

[0060] 132, 332... guide angle corner

[0061] 133, 333... material injection mark

[0062] 135, 335... lens barrel

[0063] 1351, 3351... accommodation groove

[0064] 14, 34... upper spring sheet

[0065] 15, 35... lower spring sheet

[0066] 16, 36... driving mechanism

[0067] 161, 361... driving magnet

[0068] 163, 363... coil

[0069] 17, 37... sensing mechanism

[0070] 171, 371... sensing magnet

[0071] 173, 273... sensing element

[0072] 18, 38... imaging surface

[0073] 60, 60a... electronic device

[0074] 61... flash module

[0075] 62... focus assist module

[0076] 63... image signal processing

[0077] 64... user interface

[0078] 65... image software processor

[0079] 66... subject

[0080] 70, 70a, 70b... image capturing device

[0081] 74... image stabilization module

[0082] 76... extended image signal processor

[0083] 91, 81... base

[0084] 92, 82... housing 93, 83, 73... electronic photosensitive element DETAILED DESCRIPTION

[0085] The present application is further explained in the detailed description that follows, with reference to the drawings, wherein:

[0086] The present application provides an imaging lens driving module, which includes a lens unit, a driving mechanism, a sensing mechanism, and an imaging surface. The lens unit includes an imaging lens group, and the imaging lens group has an optical axis. The imaging surface is disposed on the image side of the imaging lens group, has a central axis, and the optical axis of the imaging lens group passes through the imaging surface. The driving mechanism is at least partially coupled with the lens unit, and is used to drive the lens unit to move in a direction parallel to the optical axis.

[0087] The sensing mechanism includes a plurality of sensing magnets and a plurality of sensing elements. The sensing magnets are fixed to the lens unit; thereby, the distance between the sensing magnets and the imaging lens group can be shortened to reduce the sensing error of the sensing magnets and improve the space utilization of the imaging lens driving module. At least part of the lens unit is shielded between the sensing magnets and the driving mechanism, so that the sensing magnets do not face the driving mechanism; thereby, the magnetic fields of the sensing mechanism and the driving mechanism are prevented from interfering with each other. The number of sensing magnets can be two to four, but the present application is not limited thereto. In some embodiments, the number of sensing magnets can be five or more than five.

[0088] The sensing elements are disposed on the image side of the imaging lens group. The sensing elements are respectively disposed opposite to the sensing magnets, and the sensing elements are respectively used to detect the relative position of the sensing magnets corresponding thereto. The sensing magnets and the sensing elements can form an air sandwich layer therebetween.

[0089] The sensing mechanism is used to detect the degree of inclination of the optical axis of the imaging lens group in the lens unit relative to the central axis of the imaging surface, to obtain the degree of inclination of the lens unit, thereby facilitating the analysis of the focus blur area of the image frame, and the imaging quality can be improved after further optimization through the change of the focus range captured by the photosensitive element. The degree of inclination of the lens unit can also be, for example, the degree of inclination of the straight line connecting the optical axis between at least two sensing magnets on the opposite sides of the lens unit relative to the central axis. The implementation of the sensing mechanism of the present application for detecting the degree of inclination of the lens unit can be further extended to the category of imaging lens driving modules using suspension wires.

[0090] The shortest distance between each of the sensing magnets and its corresponding sensing element in a direction parallel to the central axis is Da, which satisfies the following condition: 0 mm ≤ Da ≤ 0.93 mm. In this way, the shortest distance between the sensing magnets and the corresponding sensing elements can be further limited to fall within the optimal working range of the sensing elements. In addition, the following condition can also be satisfied: 0 mm ≤ Da ≤ 0.5 mm. Please refer to Figure 13 , which shows a diagram of the parameter Da according to the first embodiment of the present application.

[0091] The imaging lens group can include a plurality of optical lenses, and the plurality of optical lenses include a maximum outer diameter optical lens, wherein the outer diameter of the maximum outer diameter optical lens is greater than the outer diameter of the remaining optical lenses. The outer diameter of the maximum outer diameter optical lens is ΦD, which can satisfy the following condition: 6 mm < ΦD < 20 mm. In this way, in the set range of the outer diameter, the imaging lens group can correspond to a high resolution, which helps to improve the imaging quality. Please refer to Figure 11 , which shows a diagram of the parameter ΦD according to the first embodiment of the present application.

[0092] In some embodiments, the number of sensing magnets is two. The outer diameter of the maximum outer diameter optical lens is ΦD, and the shortest distance between the two sensing magnets is d, which can satisfy the following condition: ΦD < d; in this way, the sensing mechanism can have a spatial configuration that allows for higher sensing efficiency. The shortest distance between the two sensing magnets refers to the straight-line distance between the two sensing magnets in a direction perpendicular to and passing through the optical axis. In addition, the following condition can also be satisfied: 0.05 mm < (d-ΦD) / 2 < 1.0 mm; in this way, the assembly deformation caused by the thin edge wall thickness of the lens unit can be prevented, thereby improving the assembly yield. In addition, the following condition can also be satisfied: 0.05 mm ≤ (d-ΦD) / 2 ≤ 0.8 mm; in this way, in the set range of the preferred edge wall thickness of the lens unit, the space utilization within the imaging lens driving module can be improved while ensuring the assembly yield. Please refer to Figure 11 , which shows a diagram of the parameters d and ΦD according to the first embodiment of the present application.

[0093] The sensing magnets can respectively overlap the sensing elements in a direction parallel to the optical axis. In this way, the sensing elements are arranged in a spatial configuration that can effectively sense, thereby ensuring the sensing effect of the sensing mechanism. Please refer to Figure 9 , which shows a diagram of the sensing magnets 171 respectively overlapping the sensing elements 173 in a direction parallel to the optical axis OL according to the first embodiment of the present application.

[0094] The driving mechanism can include at least one driving magnet and at least one coil, and the driving magnet and the coil are oppositely arranged, wherein one of the driving magnet and the coil is coupled to the lens unit. The driving mechanism drives the lens unit to move in a direction parallel to the optical axis by a driving magnetic force generated by electromagnetic interaction between the driving magnet and the coil. In this way, the driving mechanism can have a proper spatial configuration, and the driving efficiency of the electromagnetic force can be optimized. The driving magnetic force refers to the Lorentz force generated by electromagnetic interaction.

[0095] In some embodiments, the sensing magnet and the coil can be arranged to be mutually misaligned in a circumferential direction around the optical axis. In this way, the spatial configuration of the sensing mechanism and the driving mechanism can be defined, which is beneficial for corresponding to different types of mechanism design, thereby reducing the design and production cost. Please refer to Figure 8 , which shows a schematic diagram of the sensing magnet 171 and the coil 163 arranged to be mutually misaligned in a circumferential direction around the optical axis OL according to the first embodiment of the present application.

[0096] In some embodiments, the sensing magnet and the coil can overlap in a direction parallel to the optical axis. In this way, the lens unit can be assembled in different coil winding ways, which can increase the design margin of the assembly work station and improve the production efficiency. It is worth noting that the above is only used to illustrate the purpose of spatial configuration, which does not conflict with the aforementioned feature that the sensing magnet does not face the driving mechanism. Please refer to Figure 20 , which shows a schematic diagram of the sensing magnet 371 and the coil 363 overlapping in a direction parallel to the optical axis OL according to the second embodiment of the present application.

[0097] The height of each sensing element in a direction parallel to the central axis is h, which can satisfy the following condition: 0.01 mm < h < 0.9 mm. In this way, the possibility of miniaturization of the imaging lens driving module can be improved. Please refer to Figure 11 , which shows a schematic diagram of the parameter h according to the first embodiment of the present application.

[0098] The shortest distance between each sensing magnet and its corresponding sensing element in a direction parallel to the central axis is Da, and the height of each sensing element in a direction parallel to the central axis is h, which can satisfy the following condition: 0.01 < Da / h ≤ 4.0. In this way, the range of the tilting degree of the lens unit that can be detected by the sensing element can be defined to ensure the sensing efficiency of the sensing mechanism.

[0099] The appearance of the side of the lens unit facing the image side direction can be polygonal. In this way, the driving mechanism with more complex structure can be correspondingly matched, while the time cost of automatic machine assembly is saved. The polygon can be quadrilateral, hexagon, octagon or decagon, but is not limited thereto.

[0100] The polygon can have multiple chamfered corners. This maintains high-precision molding quality and increases product design margin.

[0101] The lens unit may have at least two injection marks, each located at a chamfered corner. This ensures that the injection mark cuts do not interfere with other mechanisms. The number of injection marks may be at least three, but this invention is not limited thereto; in other embodiments, the number of injection marks may be at least four.

[0102] The various technical features in the imaging lens driving module of the present invention can be combined and configured to achieve the corresponding effects.

[0103] Based on the above implementation methods, specific embodiments are presented below and described in detail with reference to the accompanying drawings.

[0104] <First Embodiment>

[0105] Please refer to Figures 5 to 13 ,in Figure 5 A perspective view of an image-capturing device according to a first embodiment of the present invention is shown. Figure 6 Draw Figure 5 An exploded view of the image capturing device. Figure 7 Draw Figure 5 An exploded view of the other side of the imaging device. Figure 8 Draw Figure 5 A three-dimensional schematic diagram of the imaging lens drive module, electronic photosensitive element, and base of the image acquisition device. Figure 9 Draw Figure 8 A cross-sectional view of the imaging lens drive module, electronic photosensitive element, and base along section line A-A'. Figure 10 Draw Figure 8 A cross-sectional view of the imaging lens drive module, electronic photosensitive element, and base along the B-B' section line. Figure 11 Draw Figure 5 A side view of the imaging device along the C-C' section line. Figure 12 Draw Figure 5 A side view sectional diagram of the imaging device along the D-D' section line, and Figure 13 Draw Figure 8 A side view sectional diagram of the imaging lens drive module tilted relative to the electronic photosensitive element and the base.

[0106] In this embodiment, the imaging device includes an imaging lens driving module 1, a base 91, a housing 92, and an electronic photosensitive element 93. The imaging lens driving module 1 includes a lens unit 13, an upper spring sheet 14, two lower spring sheets 15, a driving mechanism 16, a sensing mechanism 17, and an imaging surface 18.

[0107] The housing 92 is disposed on the base 91, and the lens unit 13 is movably disposed between the housing 92 and the base 91 by the upper spring leaf 14 and the lower spring leaf 15. In detail, the upper spring leaf 14 and the lower spring leaf 15 each include an inner fixed portion, an outer fixed portion, and an elastic portion (not labeled separately) connecting the inner fixed portion and the outer fixed portion, the inner fixed portion of the upper spring leaf 14 is disposed on the lens unit 13, and the outer fixed portion of the upper spring leaf 14 is assembled inside the housing 92 so that the lens unit 13 can move relative to the housing 92, and the inner fixed portion of each lower spring leaf 15 is disposed on the lens unit 13, and the outer fixed portion of each lower spring leaf 15 is assembled to the base 91 so that the lens unit 13 can move relative to the base 91.

[0108] The lens unit 13 includes an imaging lens group 130 and a lens barrel 135 for carrying the imaging lens group 130. The imaging lens group 130 has an optical axis OL, and the imaging lens group 130 includes a plurality of optical lenses 131, wherein the optical lenses include a maximum outer diameter optical lens 131a, and the outer diameter of the maximum outer diameter optical lens 131a is greater than the outer diameter of the remaining optical lenses 131b.

[0109] The imaging surface 18 is located on the image side of the imaging lens group 130, and the imaging surface 18 has a central axis CL parallel to its normal line and passing through its geometric center, wherein the optical axis OL of the imaging lens group 130 passes through the imaging surface 18. The electronic photosensitive element 93 is disposed on the base 91 and located on the imaging surface 18. In this embodiment, the maximum outer diameter optical lens 131a is closer to the imaging surface 18 than the remaining optical lenses 131b.

[0110] The appearance of the side of the lens unit 13 facing the image side direction presents an octagonal shape, and its lens barrel 135 has four guide corner corners 132. In addition, the lens unit 13 has four injection marks 133 respectively disposed on the four guide corner corners 132.

[0111] The driving mechanism 16 includes two driving magnets 161 and two coils 163, wherein the driving magnets 161 are respectively fixed on the opposite sides of the base 91, the coils 163 are respectively coupled to the opposite sides of the lens barrel 135 of the lens unit 13, and the driving magnets 161 and the coils 163 are respectively disposed corresponding to each other. By this means, the electromagnetic interaction between the driving magnets 161 and the coils 163 can generate a driving magnetic force to drive the lens unit 13 to move in the direction parallel to the optical axis OL. In this embodiment, the two sets of driving magnets 161 and coils 163 of the driving mechanism 16 are respectively disposed on the opposite sides of the lens unit 13 to jointly generate a resultant force parallel to the optical axis OL applied to the lens unit 13, so that the lens unit 13 can move in the direction parallel to the optical axis OL.

[0112] The sensing mechanism 17 includes two sensing magnets 171 and two sensing elements 173. The sensing magnets 171 are fixed to the lens barrel 135 of the lens unit 13, and the sensing magnets 171 and coil 163 are staggered relative to each other along a circumferential direction surrounding the optical axis OL. The sensing elements 173 are disposed on the image side of the imaging lens group 130 and fixed to the base 91, and the sensing elements 173 are respectively disposed opposite to the sensing magnets 171, with an air gap formed between them. The sensing elements 173 are used to detect the relative position of the sensing magnets 171 that correspond to them.

[0113] like Figure 13 As shown, when there is an angle between the optical axis OL of the imaging lens group 130 and the central axis CL of the imaging surface 18, the imaging lens drive module 1 can detect the degree of tilt of the optical axis OL relative to the central axis CL through the sensing mechanism 17, and thus obtain the degree of tilt of the lens unit 13. The degree of tilt of the lens unit 13 can be obtained by detecting the degree of tilt of the straight line connecting the two sensing magnets 171 through the optical axis OL relative to the central axis CL.

[0114] In this embodiment, as Figure 12 As shown, the outer fixing part of the upper spring plate 14 is clamped and fixed between the outer shell 92 and the driving magnet 161.

[0115] In this embodiment, by Figure 8 and Figure 9 As can be seen, the sensing magnet 171 is disposed in the receiving groove 1351 of the lens barrel 135, and at least part of the lens barrel 135 is blocked between the sensing magnet 171 and the driving mechanism 16, so that the sensing magnet 171 does not face the driving mechanism 16.

[0116] In this embodiment, the sensing magnet 171 overlaps with the sensing element 173 in a direction parallel to the optical axis OL.

[0117] The shortest distance between each sensing magnet 171 and its corresponding sensing element 173 in a direction parallel to the central axis CL is Da. In this embodiment, as shown... Figure 13 As shown, when there is an angle between the optical axis OL of the imaging lens group 130 and the central axis CL of the imaging surface 18, the following conditions are satisfied respectively: Da = 0.28 mm; and Da = 0.86 mm.

[0118] The outer diameter of the optical lens 131a with the largest outer diameter is ΦD, which satisfies the following condition: ΦD = 5.45 mm.

[0119] The shortest distance between sensing magnets 171 is d, which satisfies the following condition: d = 6.07 mm.

[0120] The outer diameter of the maximum outer diameter optical lens 131a is ΦD, and the shortest distance between the sensing magnets 171 is d, which satisfy the following conditions: ΦD < d; and (d - ΦD) / 2 = 0.31 mm.

[0121] The height of each of the sensing elements 173 in the direction parallel to the central axis CL is h, which satisfies the following condition: h = 0.3 mm.

[0122] The shortest distance between each of the sensing magnets 171 and its corresponding sensing element 173 in the direction parallel to the central axis CL is Da, and the height of each of the sensing elements 173 in the direction parallel to the central axis CL is h. In the present embodiment, as shown in FIG. 13, when an angle is included between the optical axis OL of the imaging lens group 130 and the central axis CL of the imaging surface 18, they respectively satisfy the following conditions: Da / h = 0.93; and Da / h = 2.87. Figure 13

[0123] <Second Embodiment>

[0124] Please refer to Figures 14 to 22 , wherein Figure 14 a perspective view of an image capturing device according to a second embodiment of the present application is shown, Figure 15 a perspective view of Figure 14 an exploded view of the image capturing device of Figure 16 a perspective view of Figure 14 another side of the image capturing device of Figure 17 a perspective view of Figure 14 an imaging lens driving module, an electronic photosensitive element and a base of the image capturing device of Figure 18 a cross-sectional view of Figure 17 the imaging lens driving module, the electronic photosensitive element and the base of Figure 19 a cross-sectional view of Figure 17 the imaging lens driving module, the electronic photosensitive element and the base of Figure 20 a side view cross-sectional view of Figure 14 the image capturing device of Figure 21 a side view cross-sectional view of Figure 14 the image capturing device of Figure 22 a side view cross-sectional view of Figure 17 the imaging lens driving module of

[0125] ​In the present embodiment, the image capturing device includes an imaging lens driving module 3, a base 81, a housing 82, and an electronic photosensitive element 83. The imaging lens driving module 3 includes a lens unit 33, an upper spring piece 34, two lower spring pieces 35, a driving mechanism 36, a sensing mechanism 37, and an imaging surface 38.

[0126] The housing 82 is disposed on the base 81, and the lens unit 33 is movably disposed between the housing 82 and the base 81 by the upper spring piece 34 and the lower spring pieces 35. In detail, the upper spring piece 34 and the lower spring pieces 35 each include an inner fixed portion, an outer fixed portion, and an elastic portion (not labeled separately) connecting the inner fixed portion and the outer fixed portion. The inner fixed portion of the upper spring piece 34 is disposed on the lens unit 33, and the outer fixed portion of the upper spring piece 34 is assembled inside the housing 82 so that the lens unit 33 is movable relative to the housing 82. The inner fixed portion of each of the lower spring pieces 35 is disposed on the lens unit 33, and the outer fixed portion of each of the lower spring pieces 35 is assembled to the base 81 so that the lens unit 33 is movable relative to the base 81.

[0127] The lens unit 33 includes an imaging lens group 330 and a lens barrel 335 for bearing the imaging lens group 330. The imaging lens group 330 has an optical axis OL, and includes a plurality of optical lenses 331, wherein the optical lenses include a maximum outer diameter optical lens 331a, and the outer diameter of the maximum outer diameter optical lens 331a is greater than the outer diameter of the remaining optical lenses 331b.

[0128] The imaging surface 38 is located on the image side of the imaging lens group 330, and has a central axis CL parallel to its normal line and passing through its geometric center, wherein the optical axis OL of the imaging lens group 330 passes through the imaging surface 38. The electronic photosensitive element 83 is disposed on the base 81 and located on the imaging surface 38. In the present embodiment, the maximum outer diameter optical lens 331a is closer to the imaging surface 38 than the remaining optical lenses 331b.

[0129] The lens unit 33 has an octagonal appearance on the side facing the image side direction, and its lens barrel 335 has four guide corner corners 332. In addition, the lens unit 33 has four injection marks 333 disposed on the four guide corner corners 332, respectively.

[0130] The drive mechanism 36 includes four drive magnets 361 and a coil 363. The drive magnets 361 are fixed to the upper spring plate 34 and surround the lens unit 33. The coil 363 is a ring coil that surrounds and couples to the lens barrel 335 of the lens unit 33. The drive magnets 361 and the coil 363 are arranged opposite to each other and overlap in a direction perpendicular to and passing through the optical axis OL. Thus, the electromagnetic interaction between the drive magnets 361 and the coil 363 generates a driving magnetic force to drive the lens unit 33 to move in a direction parallel to the optical axis OL. In this embodiment, the four drive magnets 361 of the drive mechanism 36 are evenly distributed around the lens unit 33 to generate a resultant force parallel to the optical axis OL, which is applied to the lens unit 33, allowing the lens unit 33 to move in a direction parallel to the optical axis OL.

[0131] The sensing mechanism 37 includes two sensing magnets 371 and two sensing elements 373. The sensing magnets 371 are fixed to the lens barrel 335 of the lens unit 33, and the sensing elements 373 are disposed on the image side of the imaging lens group 330 and fixed to the base 81. The sensing elements 373 are respectively disposed opposite to the sensing magnets 371, and an air gap is formed between them. The sensing elements 373 are used to detect a relative position of their corresponding sensing magnets 371.

[0132] like Figure 22 As shown, when there is an angle between the optical axis OL of the imaging lens group 330 and the central axis CL of the imaging surface 38, the imaging lens drive module 3 can detect the degree of tilt of the optical axis OL relative to the central axis CL through the sensing mechanism 37, and thus obtain the degree of tilt of the lens unit 33. The degree of tilt of the lens unit 33 can be obtained by detecting the degree of tilt of the straight line connecting the two sensing magnets 371 through the optical axis OL relative to the central axis CL.

[0133] In this embodiment, the outer fixing part of the upper spring sheet 34 can be clamped and fixed between the outer shell 82 and the driving magnet 361, for example.

[0134] In this embodiment, the sensing magnet 371 is disposed in the receiving groove 3351 of the lens barrel 335, and at least part of the lens barrel 335 is blocked between the sensing magnet 371 and the driving mechanism 36, so that the sensing magnet 371 does not face the driving mechanism 36.

[0135] In this embodiment, the sensing magnet 371 overlaps with the sensing element 373 in a direction parallel to the optical axis OL, and the sensing magnet 371 overlaps with the coil 363 in a direction parallel to the optical axis OL.

[0136] The shortest distance between each sensing magnet 371 and its corresponding sensing element 373 in a direction parallel to the central axis CL is Da. In this embodiment, as shown... Figure 22As shown, when an angle is included between the optical axis OL of the imaging lens group 330 and the central axis CL of the imaging surface 38, they respectively satisfy the following conditions: Da = 0.12 mm; and Da = 0.40 mm.

[0137] The maximum outer diameter of the optical lens 331a is ΦD, which satisfies the following condition: ΦD = 4.5 mm.

[0138] The shortest distance between the sensing magnets 371 is d, which satisfies the following condition: d = 4.87 mm.

[0139] The maximum outer diameter of the optical lens 331a is ΦD, and the shortest distance between the sensing magnets 371 is d, which satisfy the following conditions: ΦD < d; and (d - ΦD) / 2 = 0.19 mm.

[0140] The height of each of the sensing elements 373 in the direction parallel to the central axis CL is h, which satisfies the following condition: h = 0.3 mm.

[0141] The shortest distance between each of the sensing magnets 371 and its corresponding sensing element 373 in the direction parallel to the central axis CL is Da, and the height of each of the sensing elements 373 in the direction parallel to the central axis CL is h, which, in the present embodiment, as shown in Figure 22 As shown, when an angle is included between the optical axis OL of the imaging lens group 330 and the central axis CL of the imaging surface 38, they respectively satisfy the following conditions: Da / h = 0.40; and Da / h = 1.33.

[0142] <Third Embodiment>

[0143] Please refer to Figure 23 , a perspective view of an image capturing device according to a third embodiment of the present application is shown. In the present embodiment, the image capturing device 70 is a camera module. The image capturing device 70 comprises the imaging lens driving module 1 of the first embodiment, the electronic photosensitive element 73, and the image stabilization module 74. However, in other aspects, the image capturing device 70 comprises the imaging lens driving module 3 of the second embodiment, and the present application is not limited thereto. The image capturing device 70 uses the lens unit 13 of the imaging lens driving module 1 to generate an image, and cooperates with the driving mechanism 16 to focus the image on the imaging surface 18, and finally forms an image on the electronic photosensitive element 73 and can be output as image data.

[0144] The driving mechanism 16 can make the lens unit 13 achieve a better imaging position, and can provide a clear image under different object distances. In addition, the image capturing device 70 can be equipped with an electronic photosensitive element 73 (such as CMOS, CCD) with good photosensitivity and low noise arranged on the imaging surface 18, which can truly present the good imaging quality of the imaging lens driving module 1.

[0145] The image stabilization module 74 is, for example, an accelerometer, a gyroscope, or a Hall Effect Sensor. The driving mechanism 16 can be combined with the image stabilization module 74 to serve as an optical image stabilization (OIS) device, which adjusts the changes in different axes of the lens unit 13 to compensate for the blurred image caused by shaking at the moment of shooting, or uses image compensation technology in the image software to provide electronic image stabilization (EIS) function, thereby further improving the imaging quality in dynamic and low-light scenes.

[0146] The image capturing device of the present application is not limited to the above structure. Figure 24 A schematic diagram of another image capturing device according to the present application is shown, wherein the image capturing device 70 further comprises a flash module 61. The flash module 61 can provide light compensation during shooting to improve the imaging quality.

[0147] Figure 25 A schematic diagram of yet another image capturing device according to the present application is shown, wherein the image capturing device 70 further comprises a focus assistance module 62. The focus assistance module 62 can provide the object distance information of the object to facilitate fast focusing. The focus assistance module 62 can use an infrared or laser focus assistance system to achieve fast focusing.

[0148] <Fourth Embodiment>

[0149] Please refer to Figures 26 to 28 , wherein Figure 26 A perspective view of an electronic device according to the fourth embodiment of the present application is shown, Figure 27 A perspective view of the other side of the electronic device of Figure 26 is shown, Figure 28 A system block diagram of the electronic device of Figure 26 is shown.

[0150] In this embodiment, the electronic device 60 is a smartphone. The electronic device 60 comprises the image capturing device 70 of the third embodiment, an image signal processor 63, a user interface 64, and an image software processor 65. In this embodiment, the image capturing device 70 comprises the imaging lens driving module 1, the electronic photosensitive element 73, the image stabilization module 74, the flash module 61, and the focus assistance module 62.

[0151] When the user takes a picture of the object 66, the electronic device 60 uses the image capturing device 70 to take a light-converging image, activates the flash module 61 to provide supplementary light, uses the object distance information of the object 66 provided by the focus-assisting module 62 to perform fast focusing, and uses the image signal processor 63 to perform image optimization processing to further improve the image quality generated by the imaging lens driving module 1. The focus-assisting module 62 can use an infrared or laser focus-assisting system to achieve fast focusing. The user interface 64 can use a touch screen or a physical shooting button, and the image software processor 65 can perform image shooting and image processing with diversified functions. The image processed by the image software processor 65 can be displayed on the user interface 64.

[0152] The electronic device of the present application is not limited to the number of image capturing devices described above. Figure 29 A schematic diagram of another electronic device according to the present application is shown. The electronic device 60a further includes an image capturing device 70a and an image capturing device 70b. The image capturing device 70, the image capturing device 70a, and the image capturing device 70b face the same direction and are all single-focus, and the image capturing device 70, the image capturing device 70a, and the image capturing device 70b have different angles of view (where the image capturing device 70a is a telephoto device, the image capturing device 70b is a wide-angle device, and the angle of view of the image capturing device 70 can be between the image capturing device 70a and the image capturing device 70b), so that the electronic device can provide different magnifications to achieve an optical zoom shooting effect. Further, the image capturing device 70 of the present embodiment further includes an extended image signal processor 76, so that when the image capturing device 70 is used together with the telephoto image capturing device 70a and the wide-angle image capturing device 70b, the image captured on the touch screen can be zoomed to perform zoom function operation to meet the image processing function of multiple lenses. The electronic device 60a with the image capturing device 70 has multiple modes of shooting functions, such as zoom, telephoto, multi-lens co-photography, optimized self-portrait, high dynamic range (HDR) in low light, high-resolution 4K video recording, etc.

[0153] The imaging lens driving module 1, 3 of the present application is not limited to being applied to a smart phone. The imaging lens driving module 1, 3 can also be applied to a mobile focusing system and has the characteristics of good aberration correction and good imaging quality. For example, the imaging lens driving module 1, 3 can be applied to various electronic devices such as three-dimensional (3D) image capturing, digital cameras, mobile devices, digital tablets, smart televisions, network monitoring equipment, dash cams, reversing imaging devices, multi-lens devices, recognition systems, motion game consoles, and wearable devices. The above-mentioned electronic devices are only exemplary to illustrate the practical application examples of the present application, and are not limited to the application range of the imaging lens driving module 1, 3 of the present application.

[0154] While the application has been described by way of example with reference to specific embodiments, it is to be understood that the application is not limited to the particulars of those embodiments. Instead, many modifications and other potential uses of the application will be apparent to those skilled in the art. It is therefore intended to cover any and all modifications and uses of this application for which a claim can be drafted within the scope of the claims.

Claims

1. An imaging lens driving module, characterized in that, Comprising: A lens unit, comprising: An imaging lens group having an optical axis; A driving mechanism at least partially coupled to the lens unit, the driving mechanism being configured to drive the lens unit to move in a direction parallel to the optical axis; A sensing mechanism, comprising: A plurality of sensing magnets fixed to the lens unit, and at least a portion of the lens unit is disposed between the sensing magnets and the driving mechanism such that the sensing magnets do not face the driving mechanism; And A plurality of sensing elements disposed on an image side of the imaging lens group, the sensing elements being respectively disposed opposite to the sensing magnets, and the sensing elements are respectively configured to detect a relative position of the corresponding sensing magnet; And An imaging surface having a central axis, the imaging surface being disposed on the image side of the imaging lens group, and the optical axis of the imaging lens group passes through the imaging surface; Wherein, the sensing mechanism is configured to detect a relative position of the sensing element and the corresponding sensing magnet; Wherein, the shortest distance Da between each of the sensing magnets and the corresponding sensing element in a direction parallel to the central axis satisfies the following condition: 0 mm ≤ Da ≤ 0.93 mm.

2. The imaging lens driving module according to claim 1, characterized in that, The imaging lens group includes a plurality of optical lenses, the optical lenses include a maximum outer diameter optical lens, the outer diameter of the maximum outer diameter optical lens is greater than the outer diameters of the other optical lenses, and the outer diameter of the maximum outer diameter optical lens is ΦD, which satisfies the following condition: 6 mm < ΦD < 20 mm.

3. The imaging lens driving module according to claim 2, characterized in that, The number of the sensing magnets is two, the outer diameter of the maximum outer diameter optical lens is ΦD, and the shortest distance d between the two sensing magnets satisfies the following condition: ΦD < d.

4. The imaging lens driving module according to claim 3, characterized in that, The shortest distance d between the two sensing magnets, and the outer diameter of the maximum outer diameter optical lens is ΦD, which satisfies the following condition: 0.05 mm < (d - ΦD) / 2 < 1.0 mm.

5. The imaging lens driving module according to claim 3, characterized in that, The shortest distance d between the two sensing magnets, and the outer diameter of the maximum outer diameter optical lens is ΦD, which satisfies the following condition: 0.05 mm ≤ (d - ΦD) / 2 ≤ 0.8 mm.

6. The imaging lens driving module according to claim 1, characterized in that, The sensing magnets respectively overlap with the sensing elements in a direction parallel to the optical axis.

7. The imaging lens driving module according to claim 1, characterized in that, The driving mechanism includes at least one driving magnet and at least one coil, the at least one driving magnet is disposed opposite to the at least one coil, the driving mechanism drives the lens unit to move in a direction parallel to the optical axis by a driving magnetic force generated between the at least one driving magnet and the at least one coil, and one of the at least one driving magnet and the at least one coil is coupled to the lens unit.

8. The imaging lens driving module according to claim 7, characterized in that, The sensing magnets and the at least one coil are arranged offset from each other in a circumferential direction around the optical axis.

9. The imaging lens driving module according to claim 7, characterized in that, The sensing magnets and the at least one coil overlap in a direction parallel to the optical axis.

10. The imaging lens driving module according to claim 1, characterized in that, The height h of each of the sensing elements in a direction parallel to the central axis satisfies the following condition: 0.01 mm < h < 0.9 mm.

11. The imaging lens driving module according to claim 10, characterized in that, The shortest distance between each sensing magnet and its corresponding sensing element in the direction parallel to the central axis is Da, and the height of each sensing element in the direction parallel to the central axis is h, satisfying the following condition: 0.01 <Da / h≤4.0。 12. The imaging lens driving module according to claim 1, characterized in that, The appearance of the lens unit facing the image side is polygonal.

13. The imaging lens driving module according to claim 12, characterized in that, The polygon has multiple chamfered corners.

14. The imaging lens driving module according to claim 13, characterized in that, The lens unit has at least two injection marks, and the at least two injection marks are respectively located at the chamfered corners.

15. An electronic device, characterized in that, Include: The imaging lens driving module according to claim 1.

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