Optical sensing module, image acquisition assembly, and electronic device

Abstract

A light sensing module includes a base, a support, a light sensing component, and an electromagnetic actuation component. The support is movably disposed on the base. The light sensing component is disposed on the support. The light sensing component has a light sensing surface. The electromagnetic actuation component is between the base and the support. The electromagnetic actuation component is configured to drive the support to move the light sensing component relative to the base along a direction parallel to the light sensing surface. An image acquisition module includes a prism, a lens unit, and the light sensing module. The prism is configured to receive light from an entrance surface and reflect the light to emit the light from an exit surface. The lens unit is configured to receive the light from the prism and output the light. The light sensing module is configured to receive the light from the lens unit through the light sensing surface. An electronic device includes the light sensing module, a perception unit, and a processing unit.

Description

Technical Field

[0001] This invention relates to a light sensing module, and more particularly to a light sensing module with optical anti-shake function. Background Technology

[0002] An image acquisition assembly known to the inventors includes a prism, a lens unit, and a photosensing module. The prism is driven by a motor to perform pitch and yaw movements, thereby achieving optical image stabilization. In this image acquisition assembly, the pitch and yaw movements are controlled by separate control systems, and these control systems are fixed to different moving parts.

[0003] However, when the prism moves in the pitch or yaw direction, different moving parts may interact, causing crosstalk between the pitch and yaw movements. This crosstalk may cause the actual movement of the prism to deviate from the expected trajectory, thereby reducing the image stabilization control accuracy and optical image stabilization effect of the image acquisition components. Summary of the Invention

[0004] In view of this, this disclosure provides some embodiments of a photosensitive module capable of reducing optical anti-shake crosstalk. The photosensitive module includes a base, a support, a photosensitive component, and an electromagnetic actuation component. The support is movably disposed on the base. The photosensitive component is disposed on the support. The photosensitive component has a photosensitive surface. The electromagnetic actuation component is located between the base and the support. The electromagnetic actuation component is configured to drive the support to move the photosensitive component relative to the base in a direction parallel to the photosensitive surface.

[0005] In some embodiments, the photosensing module further includes a flexible circuit board. The flexible circuit board includes a fixing portion, a flexible connection portion, and a movable portion. The fixing portion is connected to the movable portion via the flexible connection portion. The fixing portion is fixed to a base. The movable portion is fixed to a support member. The photosensing component is fixed to the movable portion.

[0006] In some embodiments, the base has an outer flange, the fixing part of the flexible circuit board is fixed to the outer flange, and the flexible connection part is multiple strings.

[0007] In some embodiments, the photosensing module further includes a plurality of balls. The balls are positioned between the support and the base to maintain a distance between them.

[0008] In some embodiments, the electromagnetic actuation assembly includes a first actuation unit and a second actuation unit. The first actuation unit is configured to drive a support member to move the photosensitive component relative to the base along a first direction. The second actuation unit is configured to drive the support member to move the photosensitive component relative to the base along a second direction. The first and second directions are parallel to the photosensitive surface and perpendicular to each other.

[0009] In some embodiments, the first actuation unit includes a first magnet and a first coil, the first magnet being fixed to a support and the first coil being fixed to a base, and the position of the first coil corresponding to the position of the first magnet; and the second actuation unit includes a second magnet and a second coil, the second magnet being fixed to a support and the second coil being fixed to a base, and the position of the second coil corresponding to the position of the second magnet.

[0010] In some embodiments, the optical sensing module further includes a first Hall sensor component and a second Hall sensor component. The first Hall sensor component is fixed to the base and configured to sense first displacement information of the first magnet in a first direction. The second Hall sensor component is fixed to the base and configured to sense second displacement information of the second magnet in a second direction.

[0011] In some embodiments, the first magnet has a first magnetic axis, the second magnet has a second magnetic axis, and the first magnetic axis and the second magnetic axis are perpendicular to each other.

[0012] In some embodiments, the first magnet and the first coil overlap in a third direction upwards, the second magnet and the second coil overlap in a third direction upwards, and the third direction is perpendicular to the photosensitive surface.

[0013] In some embodiments, the photosensitive module further includes a magnetic conductor. The magnetic conductor is fixed to the base. A first magnet or a second magnet attracts the magnetic conductor to limit the displacement of the support in a third direction.

[0014] In some embodiments, the photosensing module further includes a limiting component. The limiting component is disposed between the base and the support to limit the displacement of the support in a third direction.

[0015] In some embodiments, the limiting component includes a magnet and a magnetic element. One of the magnet and the magnetic element is fixed to the base, and the other is fixed to the support, and the magnet and the magnetic element are attracted to each other.

[0016] This disclosure provides an image acquisition component with some embodiments. The image acquisition component includes a prism, a lens unit, and a light sensing module. The prism is configured to receive and reflect light from its incident surface and emit light from its exit surface. The lens unit is configured to receive and output light from the prism. The light sensing module is configured to receive light from the lens unit through a photosensitive surface.

[0017] In some embodiments, the image acquisition component further includes a focusing actuator. The focusing actuator is configured to control the movement of the lens unit along a direction perpendicular to the photosensitive surface.

[0018] This disclosure provides an electronic device with some embodiments. The electronic device includes a photosensing module, a sensing unit, and a processing unit. The sensing unit is used to detect the motion state of the electronic device. The processing unit is coupled to the sensing unit and the photosensing module. The processing unit is configured to know the motion state of the electronic device from the sensing unit and generate a control signal based on the motion state. The control signal controls the electromagnetic actuator of the photosensing module to drive the support member, causing the photosensitive component to move relative to the base along a direction parallel to the photosensitive surface.

[0019] In some embodiments, the sensing unit is a gyroscope, the motion state is an offset angle, and the processing unit is an integrated circuit (IC) configured to generate a control signal based on the offset angle.

[0020] As described above, some embodiments of the photosensitive module disclosed herein include an electromagnetic actuation component, which is configured to drive a support member. This support member causes the photosensitive component to move relative to the base in a direction parallel to the photosensitive surface, compensating for image shift caused by image shake. This enables the photosensitive module to provide anti-shake functionality. Therefore, the prism of the image acquisition component does not need to perform combined pitch and yaw movements, thereby reducing crosstalk caused by multi-axis prism movement and contributing to improved stability and accuracy of anti-shake control. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of an electronic device according to an embodiment of the present invention;

[0022] Figure 2 This is a schematic diagram of an image acquisition component according to an embodiment of the present invention;

[0023] Figure 3 This is a three-dimensional schematic diagram of a photosensitive module according to an embodiment of the present invention;

[0024] Figure 4 This is an exploded view of an electronic device according to an embodiment of the present invention;

[0025] Figure 5 For along Figure 3 5-5 sectional view of the line of sight; and

[0026] Figure 6 For along Figure 3 A sectional view of the line of sight 6-6.

[0027] In the attached figures, the following labels are used:

[0028] 100: Device

[0029] 300: Image Acquisition Component

[0030] 320: Prism

[0031] 340: Lens unit

[0032] 360: Focusing Actuator

[0033] 500: Sensing Unit

[0034] 700: Processing Unit

[0035] 900: Photosensitive Module

[0036] 910: Base

[0037] 912: Outer flange

[0038] 920: Support component

[0039] 930: Photosensitive Component

[0040] 932: Photosensitive surface

[0041] 940: Electromagnetic Actuation Component

[0042] 941: First Actuation Unit

[0043] 941a: First magnet

[0044] 941a': First magnetic axis

[0045] 941b: First coil

[0046] 942: Second Actuation Unit

[0047] 942a: Second magnet

[0048] 942a': Second magnetic axis

[0049] 942b: Second coil

[0050] 950: Flexible Circuit Board

[0051] 952: Fixing part

[0052] 954: Flexible connection

[0053] 956: Active Department

[0054] 960: Ball bearing

[0055] 971: First Hall sensor component

[0056] 972: Second Hall sensor component

[0057] 980: Magnetic conductor

[0058] 990: Wire Detailed Implementation

[0059] Please refer to Figure 1 as well as Figure 2 . Figure 1 This is a schematic diagram of an electronic device according to an embodiment of the present invention. Figure 2 This is a schematic diagram of an image acquisition component according to an embodiment of the present invention. In some embodiments, an electronic device 100 includes an image acquisition component 300, a sensing unit 500, and a processing unit 700. The image acquisition component 300 includes a photosensing module 900. The sensing unit 500 is used to detect the motion state of the electronic device 100. The processing unit 700 is coupled to the sensing unit 500 and the photosensing module 900. The processing unit 700 is configured to know the motion state of the electronic device 100 from the sensing unit 500 and generate a control signal based on the motion state. The control signal controls the electromagnetic actuation component 940 of the photosensing module 900 to drive the support member 920 to move the photosensitive component 930 relative to the base 910 along a direction parallel to the photosensitive surface 932 (e.g., ...). Figure 5 as well as Figure 6 As shown below, this is used for handshake compensation.

[0060] The electronic device 100 can be a smartphone, tablet computer, dashcam, or other device with light sensing or photography functions. The sensing unit 500 may include a gyroscope to sense the motion state of the electronic device 100, such as the offset angle.

[0061] The processing unit 700 may be an integrated circuit (IC) to calculate the direction and distance that the electromagnetic actuator 940 should drive the photosensitive component 930 to move based on the motion state of the electronic device 100.

[0062] In some embodiments, an image acquisition component 300 includes a prism 320, a lens unit 340, and a light sensing module 900. The prism 320 is configured to receive and reflect light from its incident surface and emit light from its exit surface. The lens unit 340 is configured to receive and output light from the prism 320. The light sensing module 900 is configured to receive light from the lens unit 340 through a photosensitive surface 932.

[0063] In some embodiments, the image acquisition assembly 300 further includes a focus actuator 360. The focus actuator 360 is configured to control the movement of the lens unit 340 along a direction perpendicular to the photosensitive surface 932. The focus actuator 360 may be implemented as a voice coil motor or a shape memory alloy, etc.

[0064] Please refer to Figures 3 to 6 . Figure 3 This is a three-dimensional schematic diagram of a photosensitive module according to an embodiment of the present invention. Figure 4 This is an exploded view of an electronic device according to an embodiment of the present invention. Figure 5 For along Figure 3 5-5 sectional view of the line of sight. Figure 6 For along Figure 3 A cross-sectional view along line 6-6. In some embodiments, a photosensing module 900 includes a base 910, a support 920, a photosensitive component 930, and an electromagnetic actuation component 940. The support 920 is movably disposed on the base 910. The photosensitive component 930 is disposed on the support 920. The photosensitive component 930 has a photosensitive surface 932. The electromagnetic actuation component 940 is located between the base 910 and the support 920. The electromagnetic actuation component 940 is configured to drive the support 920 to move the photosensitive component 930 relative to the base 910 in a direction parallel to the photosensitive surface 932.

[0065] The photosensitive component 930 may further include a circuit board and necessary electronic components, such as resistors and capacitors.

[0066] In some embodiments, the photosensing module 900 further includes a flexible circuit board 950. The flexible circuit board 950 includes a fixed portion 952, a flexible connection portion 954, and a movable portion 956. The fixed portion 952 is connected to the movable portion 956 via the flexible connection portion 954. The fixed portion 952 is fixed to the base 910. The movable portion 956 is fixed to the support member 920. The photosensitive component 930 is fixed to the movable portion 956. When the electromagnetic actuation component 940 drives the support member 920 to move, the movable portion 956 causes the photosensitive component 930 to move with the support member 920. At this time, the flexible connection portion 954 undergoes elastic deformation, thereby absorbing the movement without affecting the fixed portion 952 and other components of the photosensing module 900.

[0067] In some embodiments, the base 910 has an outer flange 912, the fixing portion 952 of the flexible circuit board 950 is fixed to the outer flange 912, and the flexible connection portion 954 is a plurality of strings. For example, the flexible circuit board 950 may be made of a thermosetting adhesive (TSA) material. The flexible circuit board 950 is electrically connected to the photosensitive component 930 and other parts of the electronic device 100 (e.g., the sensing unit 500 and the processing unit 700).

[0068] In some embodiments, the photosensing module 900 further includes a plurality of balls 960. The balls 960 are sandwiched between the support member 920 and the base 910, maintaining a distance between them. The balls 960 are configured such that their imaginary connection forms a plane parallel to the photosensitive surface 932. This allows the support member 920 to move relative to the base 910 under the rolling support of the balls 960, helping to reduce frictional resistance between the support member 920 and the base 910, making the movement of the photosensitive component 930 driven by the support member 920 smoother, thereby improving the motion stability of the photosensing module 900 during anti-shake compensation. Figure 4 In the illustrated embodiment, the number of balls 960 is four, but the invention is not limited thereto. Specifically, the number of balls 960 is at least three to ensure that they can be hypothetically connected to form a plane, thereby creating a stable support relationship between the support member 920 and the base 910.

[0069] In some embodiments, the electromagnetic actuation assembly 940 includes a first actuation unit 941 and a second actuation unit 942. The first actuation unit 941 is configured to drive the support member 920 to move the photosensitive assembly 930 relative to the base 910 along a first direction, such as... Figure 5 As indicated by the arrow in the diagram. The second actuation unit 942 is configured to drive the support member 920 to move the photosensitive assembly 930 relative to the base 910 along the second direction, as shown in the diagram. Figure 6 As indicated by the arrows in the diagram, the first and second directions are parallel to the photosensitive surface 932 and perpendicular to each other. In other words, the electromagnetic actuator 940 drives the support 920 to move the photosensitive component 930, replacing the traditional prism pitch / yaw motion method for optical image stabilization. Furthermore, because the first and second directions are linear and perpendicular to each other, this image compensation mechanism reduces mechanical coupling between different motion directions and lowers crosstalk that may be generated by multi-axis rotational motion.

[0070] In some embodiments, the first actuation unit 941 includes a first magnet 941a and a first coil 941b. The first magnet 941a is fixed to the support member 920, and the first coil 941b is fixed to the base 910, with the position of the first coil 941b corresponding to the position of the first magnet 941a. The second actuation unit 942 includes a second magnet 942a and a second coil 942b. The second magnet 942a is fixed to the support member 920, and the second coil 942b is fixed to the base 910, with the position of the second coil 942b corresponding to the position of the second magnet 942a. Since the first coil 941b and the second coil 942b are fixed to the base 910, when an electromagnetic force is generated between the first magnet 941a and the first coil 941b, and / or between the second magnet 942a and the second coil 942b, due to the coil being energized, the first magnet 941a and / or the second magnet 942a drive the support member 920 to move relative to the base 910 due to the reaction force of the electromagnetic force.

[0071] At Figures 4 to 6 In the diagram, the first coil 941b and the second coil 942b are only schematically represented as one loop each. In reality, the first coil 941b and the second coil 942b are coils that can conduct electricity and interact with the magnetic fields of the first magnet 941a and the second magnet 942a to generate electromagnetic force.

[0072] The present invention does not limit the number of the first magnet 941a, the first coil 941b, the second magnet 942a, and the second coil 942b. Figures 4 to 6 In the embodiments, the first magnet 941a is an SNS magnet or an NSN magnet, and defines a magnetic pole pair between each of the two adjacent magnetic pole regions (a total of two magnetic pole pairs). There are two first coils 941b, two second magnets 942a, and two second coils 942b. However, at least one of each is sufficient to achieve the purpose of this invention. Furthermore, the number of first magnets 941a and second magnets 942a need not be the same, nor do the number of first coils 941b and second coils 942b need to be the same.

[0073] In some embodiments, the photosensitive module 900 further includes a first Hall sensor component 971 and a second Hall sensor component 972. The first Hall sensor component 971 is fixed to the base 910 and configured to sense first displacement information of the first magnet 941a in a first direction. The second Hall sensor component 972 is fixed to the base 910 and configured to sense second displacement information of the second magnet 942a in a second direction. For example, the first Hall sensor component 971 and the second Hall sensor component 972 can sense magnetic field changes in the first direction and the second direction, respectively, and these magnetic field changes can be used to calculate the displacement of the base 910 in the two directions. The first displacement information and the second displacement information can be fed back to the processing unit 700 for monitoring and / or more control.

[0074] In some embodiments, the first magnet 941a has a first magnetic axis 941a', and the second magnet 942a has a second magnetic axis 942a', with the first magnetic axis 941a' and the second magnetic axis 942a' being perpendicular to each other. Specifically, the first magnetic axis 941a' is parallel to a first direction, and the second magnetic axis 942a' is parallel to a second direction. Therefore, the direction of the electromagnetic force generated between the first magnet 941a and the first coil 941b is parallel to the first direction, and the direction of the electromagnetic force generated between the second magnet 942a and the second coil 942b is parallel to the second direction.

[0075] In some embodiments, the first magnet 941a and the first coil 941b overlap in a third direction upwards, and the second magnet 942a and the second coil 942b overlap in a third direction upwards, with the third direction perpendicular to the photosensitive surface 932. For example, the "overlap" referred to herein can be partial or complete overlap, and the present invention is not limited thereto, as long as the magnetic field lines of the first magnet 941a can pass through the first coil 941b, and the magnetic field lines of the second magnet 942a can pass through the second coil 942b, so that electromagnetic force can be generated and used to drive the support member 920.

[0076] In some embodiments, the photosensitive module further includes a magnetically conductive element 980. The magnetically conductive element 980 is fixed to the base 910. A first magnet 941a and / or a second magnet 942a attract the magnetically conductive element 980 to limit the displacement of the support member 920 in a third direction. For example, the magnetically conductive element 980 can be fixed to the base 910 by insert molding (IM), but the invention is not limited thereto. Furthermore, the invention does not limit the size or number of the magnetically conductive elements 980, as long as they can interact with the first magnet 941a and / or the second magnet 942a to limit the displacement of the support member 920 in a third direction. For example, there may be only one magnetically conductive element 980 attracting the first magnet 941a, only one magnetically conductive element 980 attracting the second magnet 942a, only one large magnetically conductive element 980 simultaneously attracting the second magnet 942a, or multiple magnetically conductive elements 980. The magnetic limiting assembly formed by the magnetic conductor 980, the first magnet 941a, and / or the second magnet 942a can achieve a third-direction upward limiting without affecting the movement of the support member 920 in the first and second directions, thereby improving the stability of the operation and preventing the support member 920 from detaching from the base 910.

[0077] In the embodiments described in the preceding paragraph, the combination of the magnetic conductive element 980 and the first magnet 941a and / or the second magnet 942a can be collectively considered as a limiting component of the photosensitive module 900. Accordingly, it can be understood that in these embodiments, the limiting component is disposed between the base 910 and the support member 920 to limit the displacement of the support member 920 in a third direction. Furthermore, it can be understood that in these embodiments, the limiting component includes a magnet (i.e., the first magnet 941a and / or the second magnet 942a) and a magnetic element (magnetic conductive element 980), one of which is fixed to the base 910 and the other to the support member 920, and the magnet and the magnetic element attract each other to limit the displacement of the support member 920 in a third direction. However, the magnet of the limiting component is not limited to the first magnet 941a and / or the second magnet 942a, but can also be implemented with other magnets.

[0078] In some embodiments, the base 910 includes wires 990 to provide the necessary electrical connections for the first coil 941b, the second coil 942b, the first Hall sensor component 971, and / or the second Hall sensor component 972. However, the invention is not limited thereto, and the wires 990 for these components may also be located outside the base 910.

[0079] As described above, some embodiments of the photosensitive module disclosed herein include an electromagnetic actuation component, which is configured to drive a support member. This support member causes the photosensitive component to move relative to the base in a direction parallel to the photosensitive surface, compensating for image shift caused by image shake. This enables the photosensitive module to provide anti-shake functionality. Therefore, the prism of the image acquisition component does not need to perform combined pitch and yaw movements, thereby reducing crosstalk caused by multi-axis prism movement and contributing to improved stability and accuracy of anti-shake control.

Claims

1. A photosensitive module, characterized in that, Include: A base; A support member is movably mounted on the base; A photosensitive element is disposed on the support member, wherein the photosensitive element has a photosensitive surface; and An electromagnetic actuation component is located between the base and the support member, wherein the electromagnetic actuation component is configured to drive the support member to move the photosensitive component relative to the base in a direction parallel to the photosensitive surface.

2. The photosensitive module as described in claim 1, characterized in that, It further includes a flexible circuit board, which includes a fixing part, a flexible connection part, and a movable part. The fixing part is connected to the movable part via the flexible connection part. The fixing part is fixed to the base, the movable part is fixed to the support member, and the photosensitive component is fixed to the movable part.

3. The photosensitive module as described in claim 2, characterized in that, The base has an outer flange, the fixing part of the flexible circuit board is fixed to the outer flange, and the flexible connection part is a plurality of strings.

4. The photosensitive module as described in claim 1, characterized in that, It also includes multiple balls that are sandwiched between the support and the base, so that the support and the base are kept at a distance.

5. The photosensitive module as described in claim 1, characterized in that, The electromagnetic actuation component includes: A first actuation unit, configured to drive the support member to move the photosensitive component relative to the base along a first direction; and A second actuation unit is configured to drive the support member to move the photosensitive component relative to the base along a second direction; The first direction and the second direction are parallel to the photosensitive surface, and the first direction and the second direction are perpendicular to each other.

6. The photosensitive module as described in claim 5, characterized in that, The first actuation unit includes a first magnet and a first coil. The first magnet is fixed to the support member, and the first coil is fixed to the base. The position of the first coil corresponds to the position of the first magnet. as well as The second actuation unit includes a second magnet and a second coil. The second magnet is fixed to the support member, and the second coil is fixed to the base. The position of the second coil corresponds to the position of the second magnet.

7. The photosensitive module as described in claim 6, characterized in that, It further includes a first Hall sensor component and a second Hall sensor component, wherein the first Hall sensor component is fixed on the base and configured to sense a first displacement information of the first magnet in the first direction, and the second Hall sensor component is fixed on the base and configured to sense a second displacement information of the second magnet in the second direction.

8. The photosensitive module as described in claim 6, characterized in that, The first magnet has a first magnetic axis, the second magnet has a second magnetic axis, and the first magnetic axis and the second magnetic axis are perpendicular to each other.

9. The photosensitive module as described in claim 6, characterized in that, The first magnet and the first coil overlap in a third direction, the second magnet and the second coil overlap in a third direction, and the third direction is perpendicular to the photosensitive surface.

10. The photosensitive module as described in claim 6, characterized in that, It further includes a magnetic conductor, wherein the magnetic conductor is fixed to the base, and the first magnet or the second magnet is attracted to the magnetic conductor to limit the displacement of the support member in a third direction, and the third direction is perpendicular to the photosensitive surface.

11. The photosensitive module as described in claim 1, characterized in that, It further includes a limiting component, wherein the limiting component is disposed between the base and the support member to limit the displacement of the support member in a third direction, and the third direction is perpendicular to the photosensitive surface.

12. The photosensitive module as described in claim 11, characterized in that, The limiting component includes a magnet and a magnetic element, one of which is fixed to the base and the other is fixed to the support, and the magnet and the magnetic element are attracted to each other.

13. An image acquisition component, comprising: A prism is configured to receive a light ray from an incident surface and reflect the light ray, and to emit the light ray from an exit surface. A lens unit configured to receive the light from the prism and output the light; and The light sensing module as described in any one of claims 1 to 12 is configured to receive the light from the lens unit through the photosensitive surface.

14. The image acquisition component as described in claim 13, characterized in that, It also includes a focusing actuator configured to control the lens unit to move along a direction perpendicular to the photosensitive surface.

15. An electronic device, characterized in that, Include: The photosensitive module as described in any one of claims 1 to 12; A sensing unit for detecting a motion state of the electronic device; and A processing unit is coupled to the sensing unit and the photosensitive module, wherein the processing unit is configured to know the motion state of the electronic device from the sensing unit and generate a control signal according to the motion state. The control signal controls the electromagnetic actuation component of the photosensitive module to drive the support member to move the photosensitive component relative to the base in a direction parallel to the photosensitive surface.

16. The electronic device as claimed in claim 15, characterized in that, The sensing unit is a gyroscope, and the motion state is an offset angle. The processing unit is an integrated circuit (IC) configured to generate the control signal based on the offset angle.

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