actuator assembly

Abstract

An actuator assembly comprising: a support structure; an image sensor assembly comprising an image sensor having a light sensitive area, the image sensor assembly being suspended from the support structure in a manner that allows the image sensor assembly to move relative to the support structure; and at least two flexible printed circuits, each of the flexible printed circuits being electrically connected to the image sensor assembly at one end, wherein the flexible printed circuits are folded around the image sensor assembly such that their other end is on the same side of the image sensor assembly.

Description

[0001] field

[0002] The present invention relates to actuator assemblies, and particularly to those actuator assemblies that provide optical image stabilization (OIS).

[0003] background

[0004] In cameras, the purpose of OIS (Optical Image Sensor) is to compensate for camera shake, which is vibration of the camera typically caused by the user's hand movements. This vibration degrades the quality of the image captured by the image sensor. Mechanical OIS usually involves detecting vibrations using a vibration sensor such as a gyroscope sensor, and controlling an actuator arrangement based on the detected vibrations. This actuator arrangement adjusts the camera setup to compensate for the vibrations. Several techniques for adjusting the camera setup are known. While OIS through processing the captured image is theoretically possible, it requires significant processing power. Therefore, mechanical OIS has been developed, in which the camera's optical system is mechanically adjusted.

[0005] Many actuator devices employing mechanical OIS technology are known and have been successfully applied to relatively large camera devices (e.g., digital still cameras), but miniaturization has proven difficult. Cameras have become ubiquitous in a wide range of portable electronic devices (e.g., mobile phones and tablets), and miniaturization is important in many such applications. The very tight packaging of components in small camera devices presents significant challenges in adding OIS actuators within the desired package.

[0006] In one type of mechanical OIS, a camera unit comprising an image sensor and a lens assembly for focusing an image onto the image sensor is tilted relative to a support structure about two nominal axes that are perpendicular to each other and to the photosensitive region of the image sensor. This type of OIS will be referred to herein as "OIS-module-tilt". WO-2010 / 029316 and WO-2010 / 089529 each disclose an actuator assembly of this type, wherein multiple shape memory alloy (SMA) actuator lines are arranged to drive the tilting of the camera unit.

[0007] In another type of mechanical OIS, the lens assembly moves orthogonally to the optical axis of at least one lens. This type of OIS will be referred to herein as "OIS-lens shift". WO-2013 / 175197 and WO-2014 / 083318 each disclose an actuator assembly of this type, in which multiple SMA actuator lines are arranged to drive the movement of the lens assembly.

[0008] WO-2017 / 072525 discloses an image sensor mounted on a carrier, which is suspended from a support structure by a bearing that allows the carrier and the image sensor to move relative to the support structure in any direction transverse to the photosensitive area of ​​the image sensor. An actuator device comprising multiple shape memory alloy wires is arranged to move the carrier and the image sensor relative to the support structure to provide OIS (Optical Image Interpretation) of the image captured by the image sensor.

[0009] The actuator assembly can be part of a camera device that can be connected to a device such as a mobile phone handset. Components of the actuator assembly (e.g., an image sensor) require electrical connections to the device, for example, for power and / or data transmission. Electrical connections to the image sensor may impede movement of the image sensor during OIS (Optical Image Switching).

[0010] The present invention relates to alternative actuator assemblies that can provide electrical connections to an image sensor.

[0011] Overview

[0012] According to the present invention, an actuator assembly is provided, comprising: a support structure; an image sensor assembly; and at least two flexible printed circuits, the image sensor assembly including an image sensor having a photosensitive region, the image sensor assembly being suspended on the support structure in such a manner that it allows the image sensor assembly to move relative to the support structure in any direction transverse to the photosensitive region, each flexible printed circuit being electrically connected to the image sensor assembly at one end, wherein the flexible printed circuits are folded around the image sensor assembly such that their other ends are on the same side of the image sensor assembly.

[0013] Therefore, the present invention provides a flexible connection to an image sensor assembly. The movement of the image sensor assembly during OIS can be less obstructed. By providing a flexible printed circuit terminating on the same side of the image sensor assembly, the electrical connection to devices such as mobile phone handsets is simplified.

[0014] The present invention offers particular advantages when applied to actuator components of miniature cameras, for example, wherein the photosensitive region has a diagonal length of up to 12 mm or 15 mm. Brief description of the attached diagram

[0016] To provide a better understanding, embodiments of the invention will now be described by way of non-limiting examples with reference to the accompanying drawings, in which:

[0017] Figure 1 It is a schematic cross-sectional view of a camera device including a sensor shifting assembly;

[0018] Figure 2This is a cross-sectional view of the sensor shifting assembly;

[0019] Figure 3 This is a perspective view of the moving plate of the sensor shifting assembly bracket;

[0020] Figure 4 This is a plan view of the sensor shifting assembly from above;

[0021] Figure 5 This is a perspective view of the electrical connections of the image sensor assembly;

[0022] Figure 6 This is a plan view of the electrical connections of the image sensor assembly from above;

[0023] Figure 7 It is a plan view of the electrical connections of the image sensor assembly, in which the flexible printed circuit is unfolded;

[0024] Figure 8 This is a perspective view of alternative electrical connections for the image sensor assembly;

[0025] Figure 9 This is a plan view of the alternative electrical connections of the image sensor assembly from above;

[0026] Figure 10 This is a perspective view of an alternative electrical connection for the image sensor assembly;

[0027] Figure 11 This is a plan view of an alternative electrical connection for the image sensor assembly, viewed from above.

[0028] Figure 12 This is a perspective view of another alternative electrical connection for the image sensor assembly;

[0029] Figure 13 This is a plan view of another alternative electrical connection for the image sensor assembly, viewed from above.

[0030] Figure 14 This is a plan view of the data path of a flexible printed circuit.

[0031] Figure 15 This is a plan view of the data path of a flexible printed circuit.

[0032] Figure 16 It is a perspective view of part of the camera setup;

[0033] Figure 17 yes Figure 16 A plan view of the camera setup shown;

[0034] Figure 18 yes Figure 17 The diagram shows a plan view of the camera device, in which the flexible printed circuit is unfolded;

[0035] Figure 19 It is a plan view of the camera setup.

[0036] Figure 20 yes Figure 19 A plan view of the camera setup shown;

[0037] Figure 21 It is a cross-sectional view of a part of the camera device;

[0038] Figure 22 It is a perspective view of the camera setup;

[0039] Figure 23 It is a perspective view of the camera setup;

[0040] Figure 24 It is a perspective view of the camera setup;

[0041] Figure 25 It is a perspective view of the camera setup;

[0042] Figure 26 It is a perspective view of part of the camera setup;

[0043] Figure 27 It is a perspective view of part of the camera setup;

[0044] Figure 28 A is Figure 5 A schematic plan view of the electrical connections of the image sensor assembly;

[0045] Figure 28 B is a schematic plan view of a fourth alternative electrical connection for the image sensor assembly;

[0046] Figure 29 A and Figure 29 B is a perspective view of the fifth alternative electrical connection of the image sensor assembly; and

[0047] Figure 30 A and Figure 30 B is a perspective view of the sixth alternative electrical connection of the image sensor assembly.

[0048] Detailed description

[0049] Camera device including sensor shifting component

[0050] According to the present invention, a camera device 1 including a sensor shifting component 2 is in Figure 1 As shown in the figure, Figure 1 This is a cross-sectional view selected along the optical axis O. The camera device 1 will be included in a portable electronic device (such as a mobile phone or tablet). Therefore, miniaturization is an important design criterion.

[0051] Sensor shifting assembly 2 in Figures 2 to 4 It is shown in detail in the middle. Figure 2 This is a side view of sensor shifting assembly 2. Figure 3 This is a perspective view of the movable plate 9 of the bracket 8 of the sensor shifting assembly 2; and Figure 4 This is a plan view of sensor shifting assembly 2. For clarity, Figure 2 and Figure 4 The flexural portion 67 described below is omitted. The sensor shifting assembly 2 can be manufactured first and then assembled with other components of the camera device 1.

[0052] The sensor shifting assembly 2 includes a support structure 4 on which the image sensor assembly 6 is supported. The image sensor assembly 6 includes an image sensor with a photosensitive region 7, and typically also includes a printed circuit board (PCB) on which the image sensor is mounted. The optical axis O is orthogonal to the photosensitive region 7. The image sensor captures images and can be of any suitable type, such as a CCD (charge-coupled device) or CMOS (complementary metal-oxide-semiconductor) device. As conventionally, the image sensor has a rectangular photosensitive region 7. Without limiting the invention, in this example, the camera device 1 is a miniature camera in which the photosensitive region 7 has a diagonal length of up to 12 mm.

[0053] Optionally, the image sensor assembly 6 is mounted on a bracket 8 including a movable plate 9. The movable plate 9 can be formed of a sheet material, which can be metal, such as steel (e.g., stainless steel). The movable plate 9... Figure 3 The flexure 67 is shown separately and includes the flexure portion 67, which is described in more detail below.

[0054] Although in this example the bracket 8 includes a single movable plate 9, alternatively, the bracket 8 may include other layers that can be attached to or laminated with the movable plate 9.

[0055] Optionally, the support structure 4 includes a support plate 5, which may be formed of a sheet material, such as metal, like steel (e.g., stainless steel).

[0056] Although in this example the support structure 4 includes a single support plate 5, alternatively, the support structure 4 may include other layers that can be attached to or laminated with the support plate 5.

[0057] The support structure 4 also includes an edge portion 10 that is fixed to the front side of the support plate 5 and extends around the support plate 5. The edge portion 10 has a central hole 11.

[0058] The camera device 1 and / or equipment includes an integrated circuit (IC) chip 30 and a gyroscope sensor 31, which, in the illustrated example, is fixed to the rear side of the support plate 5. The control circuitry, further described below, is implemented in the IC chip 30.

[0059] The movable plate 9, together with the image sensor assembly 6, is suspended from the support structure 4 in such a way that it allows the image sensor assembly 6 to move in any direction transverse to the photosensitive region 7 (i.e., transverse to the optical axis O and parallel to the plane extending from the photosensitive region 7) and also allows the image sensor assembly to rotate about an axis parallel to the optical axis O. In the example shown, the movable plate 9 is suspended from the support structure 4 by a suspension system in the form of a sliding support 100 disposed between the support plate 5 and the movable plate 9, as will be described below.

[0060] Electrical connections of image sensor components

[0061] Figure 5 This is a perspective view of the electrical connections of the image sensor assembly 6. Figure 5 A portion of the sensor shifting assembly providing an electrical connection to the image sensor assembly 6 is shown. The electrical connection can be used to connect the image sensor to a portable electronic device, such as a mobile phone or tablet. The electrical connection can be used to supply power from the device to the image sensor. The electrical connection can be used to allow data, such as image data, to be transferred from the image sensor to the device. The electrical connection can be used for other purposes, such as providing control signals for autofocus and / or OIS, as described below.

[0062] like Figure 5 As shown, the sensor shifting assembly 2 includes at least two flexible printed circuit (FPC) portions 50 (hereinafter referred to as FPCs). FPC 50 is a portion of an FPC tape. FPC 50 can have a conventional structure, for example, including a flexible substrate made of a suitable material (e.g., plastics such as polyimide, PEEK, or polyester).

[0063] exist Figure 5 The example shown has two FPCs. However, more FPCs 50 can be provided, for example, three (e.g., ...). Figure 12 and Figure 13 (As shown), four or only one FPC 50. Each FPC 50 is connected to the image sensor assembly 6 at one end 51. The FPC 50 may be electrically and mechanically connected to a PCB (or may be an extension of the PCB) on which the image sensor is mounted. The FPC 50 may be electrically connected to the image sensor, such that power can be supplied to the image sensor and / or image data can be read from the image sensor.

[0064] like Figure 5As shown, the FPC 50 is folded (or bent) around the image sensor assembly 6. The FPC 50 extends along the image sensor assembly 6 from the end 51 connected to the image sensor assembly 6, and then bends around a corner before extending to the other end 52 of the FPC 50.

[0065] Because the FPC 50 is arranged to fold around a corner at the corner fold 54, it accommodates movement of the image sensor assembly 6 relative to the support structure 4 in any direction perpendicular to the optical axis O (including rotation of the image sensor assembly 6 about an axis parallel to the optical axis O). The FPC 50 will typically flex in a single direction perpendicular to its surface while resisting movement in other directions transverse to its surface or along its length. However, when the FPC 50 is folded, the two portions of the FPC 50 on each side of the corner fold 54 can accommodate movement in different directions with minimal strain. That is, the portion of the FPC 50 on one side of the corner fold 54 can accommodate movement of the image sensor assembly in the direction X (…). Figure 6 The FPC 50 can move left and right in the direction Y, and the portion of the FPC 50 on the other side of the corner fold 54 can accommodate the image sensor assembly 6 in the direction Y. Figure 6 The movement of (up and down) in the middle.

[0066] In this example, the corner fold 54 is 90 degrees and extends along an axis parallel to the optical axis O, which is perpendicular to the plane of the image sensor. This is advantageous because it provides optimal adaptation to the movement of the image sensor assembly 6 relative to the support structure 4 in a plane perpendicular to the optical axis O, although other configurations with folds around the corner can provide similar effects.

[0067] like Figure 5 As shown, the FPC 50 is folded around the image sensor assembly 6 such that its other end 52 is located on the same side of the image sensor assembly 6. Figure 6 It shows Figure 5 The diagram shows the electrical connections. Figure 5 In the view, the end 52 of the FPC 50 is located on the +Y side of the image sensor assembly 6 (which is elongated in the X direction). Alternatively, the end 52 may be arranged on the -Y side, +X side, or -X side of the image sensor assembly 6.

[0068] FPC 50 can include various electrical connections. For all electrical connections to be correctly formed, all FPC 50s need to be connectable to the device. Connecting the FPC 50 to the device is simplified by positioning the ends 52 of the FPC 50 on the same side of the image sensor assembly 6.

[0069] The device includes circuitry for transmitting power and data, for example. By positioning the end 52 of the FPC 50 on the same side of the image sensor assembly 6, all circuitry of the device configured to connect to the sensor shifting assembly 2 can be located together within the same area of ​​the device.

[0070] Of course, it is possible that the ends 52 of the FPC 50 can be located on different sides of the image sensor assembly 6. The two ends 52a, 52b can be connected to different parts of the device. Alternatively, if desired, the internal circuitry of the device can be arranged such that the extension wiring of the ends 52 within the device is close to each other. However, as will be understood, this may be disadvantageous.

[0071] Figure 6 This is a view of the image sensor assembly 6 viewed along the optical axis O towards the photosensitive region 7. (See image sensor assembly 6 for example.) Figure 6 As shown, two FPCs 50 are optionally provided. A first FPC 50a is connected to the +X side of the image sensor assembly 6 at one end 51a. At this end 51a, the plane of the FPC 50a is parallel to the plane of the image sensor assembly 6, which allows for connection to the image sensor assembly 6. The other end 52a of the FPC 50a is used for connection to a device.

[0072] The first FPC 50a includes a connecting fold portion 53a. The connecting fold portion 53a is primarily used to change the orientation of the plane of the FPC 50a. The connecting fold portion 53a is located between the portion of the FPC 50a connected to the image sensor assembly 6 (this portion is parallel to the plane of the image sensor assembly 6) and a folded portion 56a of the FPC 50a that folds around the image sensor assembly 6. Optionally, the folded portion 56a has a normal perpendicular to the normal of the plane of the image sensor assembly 6. Alternatively, the angle between the normal of the folded portion 56a and the normal of the image sensor assembly 6 is not 90 degrees.

[0073] Optionally, the connecting fold 53a includes multiple folds. For example, as in... Figure 5 Visible in the connecting fold 53b of the second FPC 50b, the connecting fold 53a may include multiple folds along a parallel axis. The folds may be alternately folded in different directions to form a stepped shape between the end 51a connected to the image sensor assembly 6 and the fold portion 56a.

[0074] like Figure 6As shown, the folding portion 56a includes a corner folding portion 54a. When the folding portion 56a of the FPC 50a is arranged to fold around a corner at the corner folding portion 54a, it accommodates movement of the image sensor assembly 6 relative to the support structure 4 in any direction perpendicular to the optical axis O. When the folding portion 56a of the FPC 50a is folded, the two portions of the folding portion 56a on each side of the corner folding portion 54a can accommodate movement in different directions with minimal strain. Optionally, the two portions of the folding portion 56a are parallel to the adjacent sides of the (centralized) image sensor assembly 6, although this is not required.

[0075] Alternatively, the folding portion 56a includes only one corner fold 54a. The folding portion 56a extends only along both sides of the image sensor assembly 6. This makes the electrical connection structure relatively simple.

[0076] like Figure 6 As shown, FPC 50a includes a static portion 57a. The plane of the static portion 57a ​​may be parallel to the plane of the image sensor assembly 6. FPC 50a includes a transition fold 55a. The transition fold 55a is located between the fold portion 56a and the static portion 57a. Optionally, the static portion 57a ​​remains substantially static during OIS. The fold portion 56a may flex when the image sensor assembly 6 moves relative to the support structure 4. The static portion 57a ​​extends the electrical connection wires away from the image sensor assembly 6.

[0077] like Figure 5 and Figure 6 As shown, the sensor shifting assembly 2 includes a second FPC 50b. The second FPC 50b has the same features as the first FPC 50a described above. For example, the second FPC 50b includes one end 51b connected to the image sensor assembly 6, another end 52b away from the image sensor assembly 6, a connecting fold portion 53b for angled orientation of the plane of the FPC 50b away from the plane of the image sensor assembly 6, a fold portion 56b for folding around the image sensor assembly 6, a corner fold portion 54b for changing the extension direction of the fold portion 56b, and a transition fold portion 55b between the fold portion 56b and the static portion 57b.

[0078] Optionally, the FPC 50 is folded around the image sensor assembly 6 in different directions. When viewed along the optical axis O towards the photosensitive region 7, the folded portion 56a of the first FPC 50a folds counterclockwise from the end 51a connected to the image sensor assembly 6. The folded portion 56b of the second FPC 50b folds clockwise from the end 51b connected to the image sensor assembly 6. Alternatively, the FPC 50 can be folded around the image sensor assembly 6 in the same rotational direction. For example, one FPC can be connected to, for example, the +X side of the image sensor assembly 6 and can extend clockwise around the image sensor assembly 6 to, for example, the -Y side of the image sensor assembly 6, while another FPC can be connected to, for example, the -X side of the image sensor assembly 6 and can extend around the image sensor assembly 6 in the same rotational direction to, for example, the +Y side of the image sensor assembly 6.

[0079] Figure 7 This is a plan view of the electrical connections of the image sensor assembly 6, with the FPC 50 unfolded. The FPC 50 can initially be formed as a planar strip. Folds 53, 54, and 55 are in... Figure 7 The image sensor assembly 6 is shown in the diagram. Optionally, the folding connection 53 is folded so that the folding portion 56 is folded onto the photosensitive area side of the image sensor assembly 6. This means that along the... Figure 7 The orientation shown is towards the observer when folding the connecting fold 53. Most and preferably all fold portions 56 are axially located between the top of the image sensor assembly 6 and, for example, the lens assembly 20 (described below). This reduces or eliminates the extent to which the FPC 50 increases the height of the camera device 1 (i.e., its length along the optical axis O).

[0080] like Figure 7 As shown, optionally, the sensor shifting assembly 2 includes a device connector 60. The device connector may be located at one end 52a of one of the FPCs 50a. The device connector 60 is configured to connect the sensor shifting assembly 2 to a device (e.g., a handheld device). The device connector 60 may be configured to detachably attach the camera device 1 to the device. The device connector 60 may be configured to clamp into a complementary-shaped slot in the device. The device connector 60 includes terminals for the electrical connection wires of the FPC 50.

[0081] Optionally, at least two FPCs 50 can be electrically connected to the device via the same device connector 60. This makes it easier to attach and detach the camera device 1 from the device. Alternatively, separate device connectors 60 can be provided for different FPCs 50.

[0082] Optionally, at least two FPCs 50 are connected to each other, away from the image sensor assembly 6. For example, as Figure 6As shown, FPCs 50 are connected to each other at connection point 62. For example, at connection point 62, the electrical connection wire of the second FPC 50b can be connected (e.g., by soldering) to an extension wire on the first FPC 50a. Optionally, the static portions 57 of at least two FPCs 50 overlap each other. This reduces the lateral space occupied by the FPCs 50.

[0083] like Figure 7 As shown, optionally, the first FPC 50a includes a region 58 with increased width. The increased width region 58 can be configured to accommodate an extension wire connected to an electrical connection wire from the second FPC 50b. Alternatively, the FPCs 50 can remain separate from each other. They may have separate device connectors.

[0084] like Figure 7 As shown, optionally, at least two (and optionally all) FPCs 50 are arranged such that they do not overlap each other when in the unfolded state. When the FPCs 50 are attached to the image sensor assembly 6 and are not folded, the FPCs 50 do not overlap each other. This allows the FPCs 50 to be initially formed in a single plane. This simplifies the manufacturing of the sensor shifting assembly 2.

[0085] Alternative electrical connections for image sensor components

[0086] Figure 8 This is a perspective view of alternative electrical connections for the image sensor assembly 6. Figure 9 yes Figure 8 A plan view showing alternative electrical connections for the image sensor assembly 6. (See diagram below.) Figure 8 As shown, optionally, at least two FPCs 50 are connected to the same side of the image sensor assembly 6. Figure 8 and Figure 9 Two FPCs 50 connected to the -Y side of the image sensor assembly 6 are shown.

[0087] exist Figure 8 and Figure 9 The details of the FPC 50 shown in the image are similar to those described above and in... Figures 5-7 The details shown are the same. The following description focuses on the differences. Figure 8 As shown, optionally, the static portions 57 of at least two FPCs 50 are adjacent to each other. The static portions 57 may be non-overlapping. Optionally, a single device connector 60 may be provided for connecting the electrical connections of two / all adjacent FPCs 50 to the device.

[0088] like Figure 8 and Figure 9 As shown, optionally, the folding portion 56 includes two corner folds 54 and 64. The folding portion 56 is larger than... Figures 5-7The arrangement shown further extends around the image sensor assembly 6. The folded portion 56 extends along three sides of the image sensor assembly 6. The folded portion 56 is larger than... Figures 5-7 The FPC 50 is longer in its arrangement. By providing a longer folded portion 56, the rigidity of the FPC 50 is reduced. This reduces any obstruction that the FPC 50 might cause to the movement of the image sensor assembly 6 during OIS.

[0089] Figure 10 This is a perspective view of alternative electrical connections for the image sensor assembly 6. Figure 11 yes Figure 10 A plan view showing alternative electrical connections for the image sensor assembly 6. (See diagram below.) Figure 10 As shown, optionally, at least two FPCs 50 are connected to the same side of the image sensor assembly 6. Figure 10 and Figure 11 Two FPCs 50 connected to the -Y side of the image sensor assembly 6 are shown.

[0090] exist Figure 10 and Figure 11 The details of the FPC 50 shown in the image are similar to those described above and in... Figures 5-7 The details shown are the same. The following description focuses on the differences. Figure 10 As shown, optionally, at least two static portions 57 of FPC 50 are kept at a distance from each other. The static portions 57 may be non-overlapping.

[0091] Optionally, a space 63 is provided along the side of the sensor shifting assembly 2 without the FPC. Optionally, one or more terminals (not shown) may be provided in the space 63. The terminals may be used to connect to one or more actuators, for example, for performing autofocus (i.e., movement of the lens along the optical axis O).

[0092] like Figure 10 and Figure 11 As shown, optionally, the folding portion 56 includes two corner folds 54 and 64. The folding portion 56 is larger than... Figures 5-7 The arrangement shown further extends around the image sensor assembly 6. The folded portion 56 extends along three sides of the image sensor assembly 6. The folded portion 56 is larger than... Figures 5-7 The FPC 50 is longer in its arrangement. By providing a longer folded portion 56, the rigidity of the FPC 50 is reduced. This reduces any obstruction that the FPC 50 might cause to the movement of the image sensor assembly 6 during OIS.

[0093] Figure 12 This is a perspective view of another alternative electrical connection for the image sensor assembly 6. Figure 13 yes Figure 12 The diagram shows the electrical connections. Figure 12 As shown, optionally, more than two FPCs 50 are connected to the image sensor assembly 6. For example, three FPCs 50 may be provided. Figure 12 and Figure 13 Three FPCs 50 are shown connected to different sides of the image sensor assembly 6. A first FPC 50a is connected to the +X side of the image sensor assembly 6, a second FPC 50b is connected to the -X side of the image sensor assembly 6, and a third FPC 50c is connected to the -Y side of the image sensor assembly 6. Four or more FPCs 50 may be provided.

[0094] exist Figure 12 and Figure 13 The details of the FPC 50 shown in the image are similar to those described above and in... Figures 5-7 The details shown are the same. The following description focuses on the differences. Figure 12 As shown, the static portions 57b and 57c of the two FPCs 50b and 50c overlap. The static portion 57a ​​of the first FPC 50a is adjacent to the other static portions 57b and 57c. The folded portion 57c of the third FPC 50c includes two corner folds 54c and 64c.

[0095] By using more FPC 50s, the width of the FPC 50 can be reduced while still having enough space for all electrical connections. The width of the FPC 50 determines the height occupied by the electrical connections (i.e., the height along the optical axis O). By using more FPC 50s and less height, it helps to miniaturize the structure.

[0096] Optionally, most (and optionally all) of the folded portion 56 of the FPC 50 folded around the image sensor assembly 6 is located between the tops of the image sensor assembly 6 and the lens assembly 20 in a direction perpendicular to the plane of the image sensor assembly 6. The FPC 50 carries electrical connection lines. Electrical connection lines can be provided for different functions. Optionally, the FPC 50 includes power lines for transmitting power to the image sensor assembly 6. Optionally, the FPC 50 includes data channels for transmitting data (e.g., image data). Optionally, the FPC 50 includes signal lines for transmitting control signals, such as for controlling actuators.

[0097] refer to Figure 28 A and Figure 28 B, The fourth alternative electrical connection (referred to as the "fourth interconnect") of the image sensor assembly 6 will now be described.

[0098] Figure 28 A is as shown in the reference above. Figure 5A schematic diagram of the electrical connections of the described image sensor assembly 6. The folded portion 56a of the first FPC 50a consists of a portion of length a1 and another portion of length a2, and has a total length a = a1 + a2. The folded portion 56b of the second FPC 50b consists of a portion of length b1 and another portion of length b2, and has a total length b = b1 + b2. In some examples, a = b, a1 = b1, and a2 = b2.

[0099] Figure 28 B is a schematic diagram of the fourth interconnect. In contrast to the examples described above with two or more FPCs 50, the fourth interconnect has only one FPC 50'. This single FPC 50' can be equivalent to any of the aforementioned FPCs 50 (e.g., the first FPC 50a, the second FPC 50b, or the third FPC 50c), except for the differences described below. Specifically, the FPC 50' can be folded in an equivalent manner and / or positioned equivalently relative to other components of the camera assembly 1. The FPC 50' can begin (i.e., connect to the image sensor assembly 6) on any of the four sides of the image sensor assembly 6 and can end on any of the four sides (including the side where it begins).

[0100] FPC 50' can carry all electrical connections to the image sensor, and in some examples, all electrical connections to the lateral actuator device (described below), and therefore FPC 50' can have a larger width than the aforementioned FPC 50 and / or can be formed from multiple layers of flexible printed circuits. Typically, the width of FPC 50' is limited by the requirements of the low-height camera device 1, and therefore multiple layers of flexible printed circuits are used. Such a multilayer FPC 50' can have two, three, four, five, or more layers of flexible printed circuits. Adjacent layers can be adhered to each other.

[0101] This multi-layered FPC 50' will be thicker and therefore generally more rigid, thus providing greater resistance to the lateral movement of the image sensor assembly 6. To avoid or reduce this effect, the length of FPC 50' can be increased compared to the FPC 50 described above. Figure 28 As shown in Figure B, the folded portion 56' of FPC 50' consists of a portion of length d1 (between the image sensor assembly 6 and the corner fold 54') and another portion of length d2 (after the corner fold 54'), and has a total length d = d1 + d2. Specifically, the lengths d1 and d2 of one or preferably both of these portions of FPC 50' can be greater than the equivalent lengths a1, a2, b1, and b2 in the first FPC 50a and the second FPC 50b (see Figure B). Figure 28A). Therefore, the total length d can be greater than the total lengths a and b. Lengths d, d1, and d2 can be increased by, for example, 25% or more, or 50% or more. Lengths d1 and d2 can correspond to a considerable proportion (e.g., >75%) of the length of the corresponding side of the image sensor assembly 6. For similar reasons, the multilayer FPC 50' can be folded around more than two (e.g., three or four) sides of the image sensor assembly 6.

[0102] Such a multi-layer FPC 50' may include data tracks, power tracks, and ground tracks, which are arranged to optimize the performance of the camera assembly 1 (and the use of available space). These tracks may include some or all of the following: Hatched ground (for impedance matching), analog power and ground for sensors, high-speed communication and clock with digital ground, and actuator power and separate ground. Different types of traces can be set on different layers and / or different parts of the same layer (e.g., For analog power supplies). In any case, the outward and return paths of a given signal (e.g.) The grounding elements (and shaded grounding elements) are preferably arranged on corresponding portions of adjacent layers (e.g., one on top of the other). This is to minimize current loops and thus minimize the possibility of interference with other parts of the FPC 50', the image sensor assembly 6, and / or other components of the camera device 1.

[0103] Furthermore, one or more solid ground layers (e.g., simply layers comprising relatively large, properly grounded traces) may be provided between different layers of FPC 50' and / or as one or two of the outermost layers of FPC 50'. Similarly, such solid ground layers help reduce interference between the various components of camera assembly 1. For example, the image sensor can be protected in this way by providing a solid ground layer closest to the image sensor assembly 6. In another example, FPC 50' includes the following layer sequence: Shaded grounding, direct grounding, high-speed data, etc.

[0104] Furthermore, the multilayer FPC 50' allows the weight (i.e., height) of copper to vary between different layers in order to optimize the impedance of each layer.

[0105] Some of the aforementioned features of FPC 50' may exist in other FPC 50s (e.g., first FPC 50a, second FPC 50b and / or third FPC 50c).

[0106] In the example above where multiple FPC 50s exist, power lines and data channels can be located on different FPC 50s. For example, all data channels can be located on one (or more) FPC 50s. Power lines can be located on another FPC 50 that does not have data channels. This can help reduce the risk of interference between power lines and data channels.

[0107] Figure 14 This is a plan view of the data channels of FPC 50. FPC 50 includes data channels 71 and 72. Optionally, data channels 71 and 72 are configured for high-speed data transmission. Optionally, data channels 71 and 72 are... Data channels 71 and 72 can have substantially the same length. This allows for the timing of data transmissions synchronized across different data channels 71 and 72. For ease of explanation, in... Figure 14 The diagram shows only two data channels, 71 and 72. Any number of data channels can be provided.

[0108] like Figure 14 As shown, optionally, at least one of the data channels 72 includes at least one meandering section 73, such that the data channels 71 and 72 have substantially the same length. Without the meandering section 73, the outer data channel 71 will be longer than the inner data channel 72 because the outer data channel 71 is located outside the corner in the unfolded FPC 50. The meandering section 73 is preferably located near the point where a length mismatch will occur (i.e., near the corner).

[0109] Figure 15 This is a floor plan showing alternative layouts for the data channels of the FPC 50. Figure 15 The features of FPC 50 shown in the figure are similar to those in Figure 14 The features of the FPC 50 shown are the same, with the following exceptions. (Similar to...) Figure 14 Compared to the FPC 50 shown, in Figure 15 In the FPC 50 shown, the positions of the bends 73 are different. For example... Figure 15 As shown, the location of the bend 73 can be at least one location where the path of the unfolded FPC 50 turns. Figure 15 As shown, optionally, the bend 73 is located in the static portion 57a ​​of the FPC 50. Alternatively or additionally, the bend may be located in the connecting fold 53a.

[0110] like Figure 7As shown, optionally, at least one of the FPC 50a includes at least one terminal 61. The at least one terminal 61 can be used to connect a device (e.g., a handheld device) to at least one actuator in the camera assembly 1, such as axial actuator assembly 24 and / or lateral actuator assembly (both described below). Multiple terminals 61 can be disposed in a wider portion 58 of the FPC 50a. The increased width allows for the accommodation of a greater number of terminals 61. Optionally, at least one terminal 61 is disposed on an opposing surface of the FPC 50a.

[0111] The aforementioned FPCs 50 are typically configured to reduce their stiffness in the X and Y directions and to minimize resistance to movement of the image sensor assembly 6 in these directions. This results in the FPCs being thin and tall in the Z direction, and therefore typically having relatively high stiffness in the Z direction. Consequently, any misalignment in the formation or assembly of the relevant components of the camera device 1 (causing one or more FPCs 50 to be out of their intended positions) will result in relatively large residual stresses in these FPCs 50. These residual stresses will tend to cause displacement of the image sensor assembly 6 in the Z direction, which may lead to loss of contact of some supports (e.g., sliding supports 100), and this may in turn cause the image sensor assembly 6 to tilt during actuation or attitude changes. The interconnects described below have reduced stiffness in the Z direction, which avoids or reduces these undesirable effects.

[0112] refer to Figure 29 A and Figure 29 B, The fifth alternative electrical connection (referred to as the "fifth interconnect") of the image sensor assembly 6 will now be described.

[0113] Except that each of the first FPC 50a' and the second FPC 50b' includes a split 500, the fifth interconnect is essentially the same as the one referenced above. Figure 5 The electrical connections of the image sensor assembly 6 described are identical. A slit 500 runs along the length of the folded portions 56a' and 56b' and divides the folded portions 56a' and 56b' of FPC 50a' and FPC 50b' into two parts (referred to as the "upper" part and the "lower" part). Such a slit has been shown to reduce the stiffness of FPC 50a' and FPC 50b' in the Z direction by 1 / 5.

[0114] In this example, the upper and lower portions of FPC 50a' and FPC 50b' are divided into having substantially equal Z dimensions (“height”). However, in other examples, these portions may have at least slightly different heights. In some examples, each FPC 50 may include more than one slot 500 (e.g., two or three slots 500) and may be vertically divided into more than two (e.g., three or four) portions. The slots 500 do not need to extend the entire length of the folded portions 56a' and 56b' of FPC 50a' and FPC 50b'. In principle, different FPCs 50a and FPC 50b may have different slots 500.

[0115] refer to Figure 30 A and Figure 30 B, The sixth alternative electrical connection (referred to as the "sixth interconnect") of the image sensor assembly 6 will now be described.

[0116] Apart from the following two sets of features, the sixth interconnect is essentially the same as the one mentioned above. Figure 5 The electrical connections of the image sensor component 6 described are the same.

[0117] First of all, Figure 5 In the example, at the intersection of the first FPC 50a and the second FPC 50b (see...) Figure 29 A and Figure 29 In region α of B, the FPCs typically adhere to each other and to the static support structure 4. Conversely, in the fifth interconnect, FPCs 50a” and 50b” do not adhere to each other or to the support structure 4 in region α. ​​This causes region β, where FPCs 50a” and 50b” are fixed to the support structure 4 (and thus remain static), to shift away from the image sensor assembly 6 (and particularly after the transition folds 55a and 55b). Furthermore, FPCs 50a” and 50b” may each include a flexible portion γ between the transition folds 55a and 55b and this fixed region β. This flexible portion γ is typically oriented perpendicular to the Z-direction, and thus significantly reduces the Z-stiffness of FPCs 50a” and 50b” (e.g., to 1 / 70).

[0118] Secondly, in Figure 5 In the example, the first FPC 50a and the second FPC 50b are typically adhered to the image sensor bracket 601 (a component of the image sensor assembly) (e.g., in...). Figure 29 A and Figure 29 In contrast, in the fifth interconnect, FPCs 50a” and 50b” are not adhered to the image sensor bracket 601, but extend freely to the image sensor PCB 602. This has been shown to reduce the stiffness of FPCs 50a” and 50b” in the Z direction to 1 / 75.

[0119] In some examples, the interconnect may include only the first set of features (e.g., the flexible portion γ) or only the second set of features (i.e., not adhered to the image sensor holder 601).

[0120] In some examples, the interconnect may include features of a fourth interconnect and features of a fifth interconnect (one or two sets of features).

[0121] These features for reducing Z-hardness can also be included in any of the aforementioned alternative interconnects (e.g. Figures 8 to 13 and Figure 28 In B's alternative interconnects).

[0122] Electrical connection of autofocus actuator device

[0123] Figure 16 This is a perspective view of a portion of the camera assembly 1. As described above, the lens assembly 20 may include a lens carriage 21, on which the lens 22 is supported in a manner that allows the lens 22 to move along its optical axis O. Figure 16 As shown, the lens assembly 20 may include an autofocus actuator device 80, which may correspond to... Figure 1 The axial actuator device 24 is shown. The autofocus actuator device 80 is arranged to move the lens 22 relative to the lens holder 21 along the optical axis O.

[0124] The autofocus actuator device 80 is provided with an electrical connection. This electrical connection can be used to connect the autofocus actuator device 80 to a portable electronic device (such as a mobile phone or tablet). The electrical connection can be used to supply power from the device to the autofocus actuator device 80. The electrical connection can be used to provide control signals for autofocus.

[0125] As described above, a camera connector 60 may optionally be provided. An autofocus actuator device 80 may be electrically connected to the camera connector 60. The autofocus actuator device 80 may be electrically connected to the camera connector 60 via a portion of the FPC 50. For example, the autofocus actuator device 80 may be electrically connected to one or more terminals 61 of the FPC 50. Alternatively, the electrical connection may be via one or more other FPCs.

[0126] The autofocus actuator device 80 can be electrically connected to one or more terminals 61 of the FPC 50 via the support structure 4. (Reference) Figure 16 and Figure 17 This will be explained in more detail. Figure 17 Is Figure 16 The plan view of camera device 1 shown in the figure.

[0127] The supporting structure 4 may include multiple layers. For example, such as Figure 2 As shown, the support structure 4 may include a support plate 5 as a layer of the support structure 4 and an edge portion 10. For example... Figure 16 and Figure 17 As shown, the support structure 4 may include a conductor layer 81. The conductor layer 81 includes electrical conductors. For example, the conductor layer 81 may include one or more power lines, control signal lines, and / or data channels 71. The electrical conductors within the conductor layer 81 may be electrically connected to terminals 61 of the FPC 50.

[0128] The conductor layer 81 can be positioned along the optical axis O at substantially the same axial position as the terminals 61 of the FPC 50 and / or the camera connector 60. The axial distance between the conductor layer 81 and the image sensor assembly 6 is less than the axial distance between the conductor layer 81 and the lens 22. The axial distance between the conductor layer 81 and the image sensor assembly 6 is less than the axial distance between the conductor layer 81 and the autofocus actuator device 80. Figure 16 As shown, optionally, the camera device 1 includes at least one electrical pin 82a-82d. Each electrical pin 82 is conductive and configured to provide an electrical connection to the autofocus actuator device 80. Optionally, at least one of the electrical pins 82 is used to provide power to the autofocus actuator device 80. Optionally, at least one of the electrical pins 82 is used to provide a control signal to the autofocus actuator device 80.

[0129] Electrical pin 82 is configured to extend in the direction of optical axis O. Electrical pin 82 is configured to electrically connect autofocus actuator device 80 to support structure 4, which forms the static portion of sensor shift assembly 2. Electrical pin 82 is arranged to connect autofocus actuator device 80 to conductor layer 81 of support structure 4. Other methods of forming an axial electrical connection between autofocus actuator device 80 and support structure will be known to those skilled in the art.

[0130] like Figure 16 As shown, one end of each electrical pin 82 is connected to the autofocus actuator device 80. The other end of each electrical pin 82 is connected to wires (or traces) 83a-83d in the conductor layer 81. Optionally, each electrical pin 82a-82d is connected to a corresponding wire 83a-83d.

[0131] exist Figure 16 and Figure 17 In the arrangement shown, the autofocus actuator device 80 is provided with four electrical connections. Four corresponding electrical pins 82 are connected to four corresponding wires 83 within the conductor layer 81. However, an alternative number of electrical connections can be provided. For example, two, three, or more than four connections (with corresponding electrical pins and wires) can be provided.

[0132] By providing an autofocus actuator device 80 that is electrically connected via the support structure 4, it is easier to allow the autofocus actuator device 80 to be electrically connected in a manner that does not interfere with the electrical connection of the sensor shifting assembly 2. For example... Figure 16 As shown, FPC 50 can cover the side of the autofocus actuator device 80 closest to the camera connector 60. Any FPC or other connector extending outward from this side of the autofocus actuator device 80 toward the camera connector 60 may physically interfere with FPC 50. By forming a connection through the support structure 4, an electrical connection can be formed at a location where it will not undesirably interfere with FPC 50.

[0133] like Figure 16 and Figure 17 As shown, optionally, the autofocus actuator device 80 is electrically connected to one or more terminals 61 of the FPC 50 via wiring surrounding at least two sides of the image sensor assembly 6. For example, as Figure 16 As shown, electrical pin 82 can be disposed on the side of image sensor assembly 6 opposite to terminal 61 of FPC 50. Image sensor assembly 6 is disposed between electrical pin 82 and terminal 61. Within conductor layer 81, each wire 83a-83d extends around three sides of image sensor assembly. For example, as Figure 17 As shown, two wires 83a and 83b can extend along the far side 84c, one of the short sides 84b, and the near side 84d of the image sensor assembly 6. Figure 17 As shown, two other wires 83c and 83d can extend along the far side 84c, one of the short sides 84a, and the near side 84d.

[0134] In this document, the terms "near" and "far" are relative to the positions of terminal 61 and camera connector 60. The term "short side" refers to the shorter side of the rectangular image sensor assembly. In an alternative arrangement, terminal 61 and camera connector 60 may be positioned close to the short side, in which case the near and far sides will be the short sides, while the other two sides will be the long sides. As a result, wires 83a-83d will extend along the far side, one of the long sides, and the near side.

[0135] Electrical pins 82 are located on a side of the image sensor assembly 6 that differs from the proximal side 84d of the adjacent terminals 61 and the camera connector 60. Optionally, electrical pins 82 are located on a side of the autofocus actuator device 80 that is not covered by the FPC 50. Electrical pins 82 are spaced from the FPC in a direction along the side of the image sensor assembly 6. By providing electrical connections of the autofocus actuator device 80 to one or more terminals 61 of the FPC 50 via wiring around at least two sides of the image sensor assembly 6, it is easier to reliably manufacture the camera device 1. In particular, electrical pins 82 can be accessed with a tool without interfering with the FPC 50. This makes it easier to form electrical connections for the autofocus actuator device 80 after the image sensor assembly 6 with the FPC 50 attached has been fixed in place. Increasing access to electrical connections for the autofocus actuator device 80 can increase the reliability of manufacturing the camera device 1.

[0136] Embodiments of the present invention aim to facilitate the assembly of the FPC 50 to the image sensor assembly 6 prior to the connection of the autofocus actuator device 80. This improves manufacturing reliability and, consequently, increases the yield of the camera device 1. The electrical connection between the FPC 50 and the image sensor assembly 6 can include a greater number of connections and / or physically smaller connections compared to the connection used for the autofocus actuator device 80. By connecting the FPC 50 to the image sensor assembly 6 earlier in the manufacturing process, more space exists for the tools used to handle the FPC 50 and the image sensor assembly, allowing for reliable connection formation.

[0137] like Figure 17 As shown, optionally, different wires 83a-83d extend around different sides 84a, 84b of the image sensor assembly 6. This helps to reduce the maximum space width of sides 84a, 84b required to accommodate the wires 83. However, in an alternative arrangement, all wires 83 extend along the same side of the image sensor assembly 6, which is perpendicular to the side near side 84d.

[0138] like Figure 17 As shown, optionally, multiple (and optionally all) electrical pins 82 are disposed on the same side 84c of the image sensor assembly 6. This can help reduce the number of different orientations required for assembling and / or testing the electrical pins 82. Consequently, this can help reduce the amount of tooling required, thereby improving the reliability of the manufacturing apparatus.

[0139] However, it is not necessary for all electrical pins 82 to be located on the same side of the image sensor assembly 6. In an alternative arrangement, the electrical pins 82 for connection to the autofocus actuator device 80 are located near at least two sides (and optionally three sides 84a-84c) of the image sensor assembly 6. Figure 16 and Figure 17 As shown, optionally, each wire 83 extends around three sides of the image sensor assembly 6. In an alternative arrangement, one or more wires may extend around only two sides of the image sensor assembly 6. For example, one or more electrical pins 82 may be positioned along one of the short sides 84a, 84b of the image sensor assembly 6. The corresponding wires 83 may extend only along those short sides 84a, 84b and the proximal side 84d for connection to the terminal 61. Wires 83 will not need to extend along the distal side 84c of the image sensor assembly. This can help reduce the length of the wires 83.

[0140] Figure 18 yes Figure 17 The diagram shows a plan view of the camera assembly 1, with the FPC 50 unfolded. During the manufacture of the camera assembly 1, the FPC 50 is folded, thereby adjusting the arrangement from... Figure 18 Change as shown Figure 17 As shown in the diagram.

[0141] Figure 19 This is a plan view of the camera assembly 1. As described above, the lens assembly 20 may include a lens holder 21, on which the lens 22 is supported in a manner that allows the lens 22 to move along its optical axis O. The lens assembly 20 may include an autofocus actuator device 80. The autofocus actuator device 80 is provided with an electrical connection. The electrical connection can be used to connect the autofocus actuator device 80 to a portable electronic device (e.g., a mobile phone or tablet computer).

[0142] Figure 19 An alternative method for electrically connecting the autofocus actuator device 80 to the camera connector 60 is shown. The electrical connection differs from... Figures 16-18 The electrical connections are shown. Specifically, Figure 17 Wires 83a, 83b extending around one side of the autofocus actuator device 80 are shown, as well as other wires 83c, 83d extending around the other side of the autofocus actuator device 80. Figure 19 In the arrangement shown, wires 83a and 83d are moved. Wires 83a and 83d are not placed in conductor layer 81. Figure 19 As shown, other wires 83b and 83c can be disposed within conductor layer 81. From Figure 19 and Figure 17 A comparison between them shows that, Figure 19The conductor layer shown has a reduced number of wires 83. By reducing the number of wires 83 in the conductor layer 81, the width of the conductor layer 81 can be reduced (as shown in the diagram). Figure 19 (As shown in the left-right direction). This allows the camera device 1 to be more compact in the direction perpendicular to the optical axis O.

[0143] Figure 20 yes Figure 19 Another plan view of the camera setup shown. (See diagram below.) Figure 20 As shown, the camera device 1 may include a support layer 85. The support layer 85 is a planar layer parallel to the conductor layer 81. The support layer 85 is configured to provide mechanical support to the conductor layer 81. The support layer 85 is part of the support structure 4.

[0144] The support layer 85 may be adjacent to the conductor layer 81. The support layer 85 may be stacked together with the conductor layer 81. The support layer 85 may be located between the conductor layer 81 and the autofocus actuator device 80 along the optical axis O. Figure 20 As shown, the autofocus actuator device 80 can be electrically connected to one or more terminals 61 via the support layer 85.

[0145] Figure 20 Wires 83a and 83d are shown extending through the support layer 85 to connect the autofocus actuator device 80 to the terminal 61. Wires 83a and 83d are wires other than wires 83b and 83c, which electrically connect the autofocus actuator device 80 to the terminal 61 via the conductor layer 81. Figure 19 As shown in the diagram, the autofocus actuator device 80 is electrically connected to the terminal 61 via multiple layers 81, 85 of the support structure 4. Embodiments of the present invention aim to reduce the size of the camera device 1 without reducing the number of electrical connections.

[0146] like Figure 20 As shown, the support layer 85 can be disposed in two separate portions 85a and 85b. The two portions 85a and 85b are electrically isolated from each other. For example, as Figure 20 As shown, a gap 86 can be provided to physically separate parts 85a and 85b from each other. Each part 85a and 85b is configured to electrically connect the autofocus actuator device 80 to one of the terminals 61. For example, as Figure 20 As shown, one of the portions 85a may include a wire 83d extending around one side of the autofocus actuator device 80, while the other portion 85b includes another wire 83a extending around the opposite side of the autofocus actuator device 80. The wires 83a and 83d are connected at one end to the autofocus actuator device 80. This end of the wires 83a and 83d may be located on the side of the autofocus actuator device 80 opposite to the location where terminal 61 is positioned.

[0147] according to Figure 17 The layout and Figure 19 and Figure 20 In comparison to the previous arrangement, the two external wires 83a and 83d have been removed from the conductor layer 81. The support layer 85 is divided into two parts 85a and 85b and is used to carry the wires 83a and 83d.

[0148] Optionally, the support structure 4 includes a shielding layer (not shown). The shielding layer may be another layer stacked on top of the support layer 85. The shielding layer is configured to shield from the external electromagnetic shielding conductor layer 81 of the camera device 1. Conversely, in Figure 17 In the arrangement shown, a separate shielding layer may not be necessary besides the support layer. This is because the camera device 1 may include a shielding layer to provide mechanical support to the conductor layer 81, and the support layer can be located outside the electromagnetic shielding conductor layer 81 of the camera device 1. Figure 17 In the arrangement shown, the support layer does not need to be divided into two separate parts. This may improve its ability to provide mechanical support.

[0149] In an alternative arrangement, conductor layer 81 may not need to include wires 83b and 83c. Therefore, all wires 83a-83d can be removed from conductor layer 81. The two further removed wires 83b and 83c can alternatively be arranged in another support layer 87. This other support layer 87 can be stacked together with conductor layer 81 and support layer 85 as part of support structure 4. This is... Figure 21 It is shown in the cross-sectional view.

[0150] The other support layer 87 can be with Figure 20 The support layer 85 shown has a similar structure. In particular, another support layer 87 can be disposed in two separate, electrically isolated sections. Each section can carry one of the wires 83b and 83c.

[0151] By providing two support layers 85 and 87, the width of the conductor layer 81 can be further reduced. This helps to make the camera device 1 more compact in the direction perpendicular to the optical axis O. Another support layer 87 can be combined with support layer 85 to provide mechanical support to the conductor layer 81. The thickness of support layers 85 and 87 can be reduced accordingly. This can help to reduce any potential increase in the size of the camera device 1 in the direction of the optical axis O. For example, in embodiments, support layer 85 and / or another support layer 87 can have a thickness of up to 200 μm, optionally up to 100 μm, and optionally up to 50 μm.

[0152] Support layer 85 and / or another support layer 87 may comprise a conductive material (e.g., steel). Support layer 85 and / or another support layer 87 may be coated with an electrically insulating material. This facilitates electrical isolation of the wires carried by the support layers 85, 87 from any wires carried in the conductor layer 81. Support layers 85, 87 may be attached to each other and to the conductor layer 81 using an adhesive. The adhesive may be electrically insulating. Conversely, in Figure 17 In the arrangement shown, the support layer can be welded to the support structure 4 as a possible alternative to using adhesives.

[0153] like Figure 21 As shown, the autofocus actuator device 80 can be electrically connected to the terminal 61 via multiple layers 85, 87 of the support structure 4. These layers 85, 87 are layers stacked on the conductor layer 81 of the support structure 4. The conductor layer 81 is a layer that includes data channels configured to transmit data or electricity.

[0154] Figure 22 This is a perspective view of an alternative arrangement of camera device 1. Figure 22 The arrangement shown differs from the previous arrangement in that the electrical connection between the autofocus actuator device 80 and the device connector 60 is different. For example... Figure 22 As shown, one of the flexible printed circuits 50a includes an arm 89. The arm 89 is electrically connected to an autofocus actuator device 80, such that the autofocus actuator device 80 is electrically connected to a device connector 60 via the arm 89. The arm 89 may be part of the flexible printed circuit 50a specifically designed for electrical connection to the autofocus actuator device.

[0155] like Figure 22 As shown, arm 89 can extend from one side of the flexible printed circuit 50. Figure 22 In the view shown, arm 89 extends from the uppermost side of the flexible printed circuit 50.

[0156] like Figure 22 As shown, arm 89 can extend along a plane perpendicular to the optical axis O (i.e., a plane parallel to the extension of the photosensitive region 7). Arm 89 extends in a plane at a 90-degree angle relative to the portion of the flexible printed circuit 50 that extends around the edge of the autofocus actuator device 80.

[0157] By providing arm 89, it is unnecessary to place wires 83a-83d in conductor layer 81. This can help reduce the size of camera device 1 in the direction perpendicular to optical axis O. Figure 22 As shown, arm 89 can extend through a portion of the top of the autofocus actuator assembly 80. (As...) Figure 20 As shown, arm 89 is electrically connected to autofocus actuator device 80 at multiple connections 88. Connections 88 may correspond to the locations of terminals on autofocus actuator device 80. For example... Figure 22 As shown, connection 88 can be located at the top of autofocus actuator device 80. Alternatively, terminals of autofocus actuator device 80 can be located at the bottom of autofocus actuator device 80. Another electrical connector, such as another flexible printed circuit, can be provided to connect the terminals at the bottom of autofocus actuator device 80 to the top of autofocus actuator device 80, at which point connection 88 to arm 89 of flexible printed circuit 50 can be formed.

[0158] In another alternative, connection 88 can be positioned on the side of the autofocus actuator device 80. This can help reduce any potential increase in the size of the camera device 1 in the optical axis O direction.

[0159] Figure 23 This is a perspective view of alternative arrangements of camera device 1. Specifically, Figure 23 Alternative arrangements for electrically connecting the autofocus actuator device 80 to the device connector 60 are shown. For example... Figure 23 As shown, the flexible printed circuit 50 includes an arm 90 electrically connected to the autofocus actuator device 80. This is consistent with... Figure 22 The principle shown is similar. However, in Figure 23 In the arrangement shown, arm 90 extends around at least two sides of image sensor assembly 6. Arm 90 extends around the edge of autofocus actuator device 80 in a manner similar to how flexible printed circuit 50 extends around the sides of autofocus actuator device 80.

[0160] like Figure 23 As shown, the electrical connection 88 can be located on the side of the autofocus actuator device 80. The connection 88 can be located on the side of the autofocus actuator device 80 opposite to the position where the device connector 60 is located. This helps to avoid increasing the size of the camera device 1 in the direction parallel to the optical axis O. Figure 23 As shown, arm 90 may include a 90-degree turn relative to the corner of autofocus actuator device 80. Arm 90 extends in a plane parallel to the optical axis O. This can help reduce any constraints that arm 90 might otherwise impose on the movement required for optical image stabilization.

[0161] exist Figure 23 In the arrangement shown, arm 90 is an extension of flexible printed circuit 50a. The electrical connection for the autofocus actuator device 80 depends on flexible printed circuit 50a.

[0162] Figure 24 This is a perspective view of alternative arrangements of camera device 1. For example, such as... Figure 24As shown, another flexible printed circuit 98 can be provided, extending around the edge of the autofocus actuator device 80 without being electrically connected to the flexible printed circuits 50a and 50b. This other flexible printed circuit 98 can be independent of the flexible printed circuit for power / data transmission to the image sensor assembly 6. Figure 24 and Figure 25 As shown, another flexible printed circuit 98 can be connected to PCB 59, which in turn can be connected to device connector 60 via flexible printed circuit 52'. Flexible printed circuits 50a and 50b can terminate at a width-enhanced portion 58, which can also be connected to PCB 59. Another flexible printed circuit 98 can be disposed between flexible printed circuit 50a and autofocus actuator device 80. Alternatively, as Figure 24 As shown, the flexible printed circuit 50a can be disposed between another flexible printed circuit 98 and the autofocus actuator device 80.

[0163] Optionally, such as Figure 24 As shown, another flexible printed circuit 98 for providing an electrical connection to the autofocus actuator device 80 is attached to the aforementioned support layer. For example, the other flexible printed circuit 98 can be attached to the support layer using an adhesive. Figure 24 As shown, another flexible printed circuit 98 can extend in a plane parallel to the support layer. Additionally or alternatively, such as... Figure 25 As shown, a portion of another flexible printed circuit 98 can extend in a plane parallel to the optical axis O. For example, from... Figure 20 As can be seen, the amount of available space on the support layer surrounding the side of the image sensor assembly 6 can be limited. If there is not enough space for another flexible printed circuit 98 (e.g., due to flexible printed circuits 50a, 50b), then... Figure 25 As shown, another flexible printed circuit 98 can be wired along the side 99 of the support structure 4.

[0164] Optionally, such as Figure 24 As shown, when viewed along an axis orthogonal to the plane extending from the photosensitive region 7, another flexible printed circuit 98 is completely overlapped by the support structure 4. This other flexible printed circuit 98 does not add any additional dimensions to the camera device 1 in the direction perpendicular to the optical axis O.

[0165] Figure 26 It is a perspective view of a portion of a camera device 1 arranged according to alternative configurations. Figure 26Printed circuit 91 is shown. Printed circuit 91 carries an electrical connection from autofocus actuator device 80. Printed circuit 91 is connected to autofocus actuator device 80 via connection 88. Connection 88 may be on the same side of image sensor assembly 6 as terminal 61. Printed circuit 91 is used to connect to terminal 61 of device connector 60.

[0166] like Figure 26 As shown, the printed circuit 91 includes a bend 93. The bend 93 is configured to be positioned around the edge of at least one of the flexible printed circuits 50. The bend 93 is a connection portion between two planar portions 92, 94. At least one of the flexible printed circuits 50 is arranged to extend through the gap between the planar portions 92, 94. Therefore, the autofocus actuator device 80 can be electrically connected to the terminal 61 of the printed circuit 50 via the printed circuit 91, which includes the bend 93 around the edge of at least one of the flexible printed circuits 50. The printed circuit 91 may include wires extending from the connection 88 along the planar portion 92, around the bend 93, along the planar portion 94, and along one or more side arms 95 to the connector 96. The connector 96 can be electrically connected to the terminal 61. Optionally, the two planar portions 92, 94 are disposed radially inside the housing (can) 15. Figure 1 (As shown). Alternatively, the housing 15 may pass between the planar portions 92 and 94. In addition to bending around the edge of the flexible printed circuit 50, the bent portion 93 may also bend around the edge of the housing 15.

[0167] The connection 88 between the printed circuit 91 and the autofocus actuator device 80 can be covered by at least one of the flexible printed circuits 50. This may make it difficult to provide a simple electrical connection between the device connector 60 and the autofocus actuator device 80. By providing a bend 93 to the printed circuit 91, the electrical connection can be achieved relatively simply.

[0168] Figure 27 yes Figure 26 A perspective view of a modified version of the printed circuit 91 shown. (As shown) Figure 27 As shown, optionally, the printed circuit 91 also includes one or more additional terminals 97. The additional terminals 97 are connected to a connection 88 between the printed circuit 91 and the autofocus actuator device 80. Figure 27As shown, an additional terminal 97 is located on the side of the autofocus actuator device 80 opposite to the connection 88. The electrical connection between the additional terminal 97 and the connection 88 is provided via one or more side arms 96 extending around the edge of the image sensor assembly 6. The additional terminal 97 is a terminal other than the terminal of the device connector 60. Therefore, electrical connections to the autofocus actuator device 80 are provided on both sides of the camera device 1. For example, the additional terminal 97 can be used during the manufacturing of the camera device 1. Meanwhile, once the camera device 1 has been manufactured and an electrical connection to the device is required, the electrical connection to the device connector 60 is used.

[0169] Optionally, the lens assembly includes a lens actuator device arranged to move the lens perpendicular to the optical axis O. Therefore, a lens shifting mechanism can be present, which can provide optical image stabilization. The optical connection for lens shifting can be provided by the same means as the electrical connection for controlling autofocus. Specifically, the electrical connection can be in conjunction with, for example... Figures 16-27 The wiring is done in a similar manner to the one shown.

[0170] Further details of the camera setup

[0171] The arrangement of the sliding support 100 will now be described. In this example, the sliding support 100 includes a first support surface 101 on the bracket 8 (particularly the lower surface of the movable plate 9) and a second support surface 102 on the support structure 4 (particularly the upper surface of the support plate 5). In this example, support surfaces 101 and 102 are each planar. Support surfaces 101 and 102 support each other, thereby suspending the bracket 8 on the support structure 4. Since support surfaces 101 and 102 can slide relative to each other, they allow the image sensor assembly 6 to move in any direction transverse to the photosensitive region 7, and further allow the image sensor assembly to rotate about an axis orthogonal to the photosensitive region 7.

[0172] The sliding support 100 not only suspends the image sensor assembly 6 but also facilitates heat transfer from the image sensor assembly 6 to the support structure 4. This is because the support surfaces 101 and 102 provide a continuous area of ​​thermally conductive material without air gaps. This provides a path with good thermal conductivity for heat dissipation from the image sensor assembly 6 and provides the necessary suspension. This allows the support structure 4 to act as a heat sink for the image sensor assembly 6.

[0173] The heat transfer from the image sensor assembly 6 is further facilitated by forming the moving plate 9 and the support plate 5 with materials having high thermal conductivity (such as metal).

[0174] In the example shown, a single sliding support 100 is disposed between the support plate 4 and the bracket 8. In this example, the sliding support 100 has a rectangular contact area between the support surfaces 101 and 102. However, typically, the contact area can vary and / or multiple sliding supports 100 may be provided.

[0175] When a single sliding support portion 100 is provided, the contact area 110 of the sliding support portion 100 can have a shape other than a rectangle. As an example, the contact area 110 can have a circular shape, which can be easier to manufacture and / or help to provide a balanced support contact.

[0176] Providing multiple sliding bearings 100 can help manufacture and / or help provide balanced support contact. Typically, at least three sliding bearings can be used to provide stable contact.

[0177] The total contact area of ​​the support surfaces 101 and 102 of the sliding support portion 100 (or the total area of ​​all sliding support portions 100 if more than one sliding support portion 100 is provided) is selected to control friction and thermal conductivity. Generally, there is a balance between reducing friction by minimizing the total area and increasing thermal conductivity by maximizing the total area.

[0178] The material properties of support surfaces 101 and 102 are selected to provide a sliding support with low friction and low wear. Regarding friction reduction, support surfaces 101 and 102 can be designed to have a coefficient of friction of 0.2 or less.

[0179] Support surfaces 101 and 102 can each be made of the same material as the element, which forms the support surface on the element, such as a support plate 5 or a movable plate 9. The material can be selected to provide suitable properties.

[0180] A fluid 103 may be disposed between support surfaces 101 and 102, as shown in the example illustrated. The material properties of the fluid 103 (if provided) are selected to provide lubrication between support surfaces 101 and 102, such that the coefficient of friction between support surfaces 101 and 102 is reduced and / or it has a thermal conductivity that improves the thermal contact between support surfaces 102 and 103. For example, the fluid 103 may be grease.

[0181] However, fluid 103 is optional. As an alternative to providing fluid 103, support surfaces 101 and 102 can be in direct contact. Depending on the material properties of support surfaces 101 and 102 and / or the coatings on them, this can provide a sufficient coefficient of friction and thermal contact.

[0182] Furthermore, the sensor shifting assembly 2 includes two flexures 67 connected between the support structure 4 and the bracket 8 to act as a biasing arrangement that biases the support surfaces 101 and 102 together, and to provide an electrical connection to the image sensor assembly 6. In this example, the flexure 67 is integrally formed with the moving plate 9 at one end 68 and mounted to the support plate 5 of the support structure 4 at its other end 69. Alternatively, the flexure 67 may be integrally formed with the plate of the support structure 4 and mounted to the bracket, or it may be a separate element mounted to each of the support structure 4 and the bracket 8. In any of these examples, the mounting of the flexure 67 may be achieved, for example, by welding to provide both mechanical and electrical connections.

[0183] The flexural portions 67 are arranged as follows to provide their mechanical function. Each flexural portion 67 is an elongated beam connecting the support structure 4 and the bracket 8. Due to its inherent elasticity, the flexural portion 67 biases the support structure 4 and the bracket 8 together, applying a biasing force parallel to the optical axis O. This maintains contact between the support surfaces 101 and 102 of the sliding support portion 100. At the same time, the flexural portion 67 can deflect laterally to allow the image sensor assembly 6 to move and rotate laterally relative to the support structure 4, thereby enabling OIS functionality.

[0184] The flexural portion 67 also provides a lateral biasing force due to its inherent elasticity, which biases the image sensor assembly 6 toward the central position from any direction around the central position aligned with the optical axis O of the lens assembly 20. As a result, the image sensor assembly 6 will tend toward the central position without driving the SMA actuator line 40. This ensures that the camera device 1 maintains its image capture function even without driving the SMA actuator line 40.

[0185] The flexure 67 is designed to provide a suitable holding force for the sliding support 100 along the optical axis O, and also allows lateral movement using a lateral bias force. The magnitude of the lateral bias force is kept low enough not to impede OIS, while being high enough to center the image sensor assembly 6 without a drive. Each flexure 67 has a cross-section, wherein the average width of the cross-section orthogonal to the optical axis O is greater than its average thickness parallel to the optical axis O. Each flexure extends in an L-shape around the optical axis O, and it is generally desirable that the angle range, as measured between the ends of the flexure 67, is at least 90°.

[0186] In the assembled state of the sensor shifting assembly 2, the flexure 67 deflects from its relaxed state to provide a preload force that biases the support structure 4 and the bracket 8 together.

[0187] The flexural portion 67 is made of a suitable material that provides the desired mechanical properties and is electrically conductive. Typically, this material is a metal with a relatively high yield, such as steel (e.g., stainless steel).

[0188] The movement of the image sensor assembly 6 relative to the support structure 4 is driven by a lateral actuator device, which is arranged as follows, and... Figure 4 The most easily visible part is the lateral actuator assembly, which consists of a total of four SMA actuator lines 40 connected between the support structure 4 and the bracket 8. For attaching the SMA actuator lines 40, the bracket 8 includes a crimp portion 41 fixed to the movable plate 9, while the support structure 4 includes a crimp portion 42 fixed to the edge portion 10. The crimp portions 41 and 42 crimp the four SMA actuator lines 40 to connect them to the support structure 4 and the bracket 8. The crimp portion 41 fixed to the movable plate 9 is integrally formed of a metal sheet to electrically connect the SMA actuator lines 40 together at the bracket 8.

[0189] Although in this example, the crimp portions 41 and 42 are separate elements fixed to the movable plate 9 and the edge portion 10, alternatively, the crimp portion 41 may be integrally formed with the movable plate 9 and / or the crimp portion 42 may be integrally formed with the support plate 5.

[0190] The SMA actuator lines 40 are arranged such that they can move the image sensor assembly 6 in any direction transverse to the photosensitive region 7 relative to the support structure 4 during selective actuation, and can also rotate the image sensor assembly 6 about an axis orthogonal to the photosensitive region 7.

[0191] Each SMA actuator line 40 remains taut, thereby applying force between the support structure 4 and the bracket 8.

[0192] The SMA actuator line 40 may be perpendicular to the optical axis O, such that the force applied to the bracket 8 is transverse to the photosensitive region 7. Alternatively, the SMA actuator line 40 may be tilted at a small angle relative to the photosensitive region 7, such that the force applied to the bracket 8 includes a component transverse to the photosensitive region 7 and a component along the optical axis O, the component along the optical axis O acting as a biasing force that biases the support surfaces 101 and 102 of the sliding support portion 100 together.

[0193] The general arrangement of the SMA actuator lines 40 will now be described (which is similar to the general arrangement described in WO-2014 / 083318), except that they are connected to the bracket 8 for moving the image sensor assembly 6 instead of to the lens assembly 20.

[0194] SMA materials possess the property that they undergo a solid-state phase transformation upon heating, leading to shrinkage. At low temperatures, SMA enters the martensite phase. At high temperatures, it enters the deformation-inducing austenite phase, resulting in further shrinkage. Due to the statistical distribution of transformation temperatures within the SMA crystal structure, phase transformations occur within a specific temperature range. Therefore, heating the SMA actuator lines 40 causes them to decrease in length.

[0195] The SMA actuator line 40 can be made of any suitable SMA material, such as nitinol or other titanium alloy SMA materials. Advantageously, the material composition and pretreatment of the SMA actuator line 40 are selected to provide a phase transition within a temperature range that is above the desired ambient temperature during normal operation and is as wide as possible to maximize the degree of position control.

[0196] When one of the SMA actuator wires 40 is heated, the stress therein increases and the SMA actuator wire 40 contracts, resulting in movement of the image sensor assembly 6. Movement occurs within a certain range when the temperature of the SMA increases above the temperature range in which the SMA material undergoes its transformation from martensitic to austenitic phase. Conversely, when one of the SMA actuator wires 40 is cooled, reducing the stress therein, the SMA actuator wire 40 expands under force from the opposite SMA actuator wire 40. This causes the image sensor assembly 6 to move in the opposite direction.

[0197] The bracket 8 and the image sensor assembly 6 are axially positioned within the holes 11 of the edge portion 10 of the support structure 4. Four SMA actuator lines 40 are arranged on the four sides of the image sensor assembly 6. The SMA actuator lines 40 have the same length and are arranged in a rotationally symmetrical manner.

[0198] As seen axially, the first pair of SMA actuator lines 40 are parallel to the first axis. Figure 4 The first axis extends vertically (in the middle), and is transverse to the photosensitive region 7. However, the first pair of SMA actuator lines 40 are connected to the support structure 4 and the bracket 8 in the opposite direction, such that they extend along the first axis (in the middle). Figure 4 The forces applied by the first pair of SMA actuator lines 40 are balanced, with equal tension in each SMA actuator line 40. This means that the first pair of SMA actuator lines 40 applies a first torque (vertically upward and downward) to the image sensor assembly 6. Figure 4 (The middle is counterclockwise).

[0199] As observed axially, the second pair of SMA actuator lines 40 are parallel to the second axis (in... Figure 4Extending horizontally (in the middle), this second axis is transverse to the photosensitive region 7. However, the second pair of SMA actuator lines 40 are instead connected to the support structure 4 and the bracket 8, such that they extend along the second axis (in the middle horizontally). Figure 4 The forces applied by the second pair of SMA actuator lines 40 are balanced, with equal tension in each SMA actuator line 40. This means that the second pair of SMA actuator lines 40 applies a second torque to the image sensor assembly 6. Figure 3 (Clockwise), the second torque is arranged opposite to the first torque. Therefore, with the same tension in each SMA actuator line 40, the first and second torques are balanced.

[0200] As a result, the SMA actuator line 40 can be selectively driven to move the image sensor assembly 6 laterally in any direction and rotate the image sensor assembly 6 about an axis parallel to the optical axis O.

[0201] Right now:

[0202] The movement of the image sensor assembly 6 in any direction along the first axis can be achieved by driving the first pair of SMA actuator lines 40 to contract differentially, as they apply forces in opposite directions.

[0203] Movement of the image sensor assembly 6 in either direction along the second axis can be achieved by differentially contracting the second pair of SMA actuator lines 40, due to them applying forces in opposite directions; and

[0204] The rotation of the image sensor assembly 6 can be achieved by driving the first pair of SMA actuator lines 40 and the second pair of SMA actuator lines 40 to contract differentially, due to the first torque and the second torque being opposite.

[0205] The size of the range of movement and rotation depends on the geometry and contraction range of the SMA actuator line 40 within its normal operating parameters.

[0206] This particular arrangement of the SMA actuator lines 40 is advantageous because it allows the desired lateral movement and rotation to be driven with a minimal number of SMA actuator lines. However, other arrangements of the SMA actuator lines 40 can be applied. To provide three degrees of movement (two lateral and one rotational), at least four SMA actuator lines 40 are provided. Other arrangements can employ different numbers of SMA actuator lines 40. Fewer SMA actuator lines 40 can be provided for lateral movement but not for rotation. Arrangements with more than four SMA actuator lines 40 are also possible and can have advantages in allowing control over additional parameters besides movement, such as the degree of stress in the SMA actuator lines 40.

[0207] The lateral position and orientation of the image sensor assembly 6 relative to the support structure 4 are controlled by selectively altering the temperature of the SMA actuator line 40. This actuation of the SMA actuator line 40 is achieved by passing a selective drive signal through the SMA actuator line 40 to provide resistive heating. Heating is provided directly by the current of the drive signal. Cooling is provided by reducing or stopping the current of the drive signal to allow the SMA line 40 to cool through conduction, convection, and radiation to its surroundings.

[0208] The camera device 1 includes a lens assembly 20, which is assembled with the sensor shifting assembly 2 by being mounted to the support structure 4 (in particular to the edge portion 10).

[0209] The lens assembly 20 includes a lens holder 21 in the form of a cylindrical body, which is mounted to the edge portion 10 of the support structure 4. The lens holder supports at least one lens 22 arranged along the optical axis O. Typically, any number of one or more lenses 22 can be provided. Without limiting the invention, in this example, the camera device 1 is a miniature camera, wherein at least one lens 22 (i.e., each lens 22 if multiple lenses are provided) typically has a diameter of at most 10 mm, 15 mm, or 20 mm. At least one lens 22 of the lens assembly 20 is arranged to focus an image onto an image sensor.

[0210] In this example, at least one lens 22 is supported on the lens holder 21 in such a way that at least one lens 22 is movable relative to the lens holder 21 along the optical axis O, for example, to provide focusing or zooming, although this is not necessary. Specifically, at least one lens 22 is fixed to a lens holder 23, which is movable relative to the lens holder 21 along the optical axis O. In the presence of multiple lenses 22, any or all of the lenses 22 may be fixed to the lens holder 23 and / or one or more lenses 22 may be fixed to the lens holder 21 and therefore cannot move relative to the lens holder 21 along the optical axis O.

[0211] An axial actuator device 24 disposed between the lens holder 21 and the lens retainer 23 is arranged to drive the lens retainer 21 and the lens 22 to move relative to the lens holder 21 along the optical axis O. The axial actuator device 24 can be of any suitable type, such as an arrangement of voice coil motor (VCM) or SMA actuator lines, as described, for example, by reference to WO-2019 / 243849 incorporated herein by reference.

[0212] In addition, the camera device 1 may include a housing 15, which is fixed to the support structure 4 and protrudes forward from the support structure 4 to surround and protect other components of the camera device 1.

[0213] As described above, in operation, the SMA actuator line 40 is selectively driven to move the image sensor assembly 6 laterally in any direction and / or rotate the image sensor assembly 6 about an axis parallel to the optical axis O. This is used to provide OIS, compensating for image movement of the camera device 1 caused by, for example, hand shakiness.

[0214] The relative movement of the image sensor with respect to the support structure 4 and therefore also with respect to the lens assembly 20 can be used to stabilize the image for tilting (i.e., rotation about an axis that extends laterally to the photosensitive region 7) of the camera device 1. This occurs in a manner similar to that of camera devices with OIS lens shifting of the type disclosed in WO-2013 / 175197 and WO-2014 / 083318, which also involves relative lateral movement of the image sensor and the lens assembly 20. Furthermore, rotation of the image sensor can be used to stabilize the image for rotation of the camera device 1 about the optical axis O. This type of stabilization is not achieved by providing a camera device with OIS lens shifting of the type disclosed in WO-2013 / 175197 and WO-2014 / 083318.

[0215] The SMA actuator lines 40 are driven by a control circuit implemented in the IC chip 30. Specifically, the control circuit generates a drive signal for each SMA actuator line 40 and provides the drive signal to the SMA actuator line 40.

[0216] The control circuit 30 receives the output signal of the gyroscope sensor 31, which acts as a vibration sensor. The gyroscope sensor 31 detects the vibrations experienced by the camera device 1, and its output signal represents these vibrations, specifically the angular velocity of the camera lens element 20 in three dimensions. The gyroscope sensor 31 is typically a pair of miniature gyroscopes used to detect vibrations around three axes: two axes laterally to the photosensitive area 7, and an optical axis O. More generally, a larger number of gyroscopes or other types of vibration sensors can be used.

[0217] The drive signal is generated by the control circuit in response to the output signal of the gyroscope sensor 31 to drive the movement of the image sensor assembly 6 to stabilize the image focused on the image sensor by the camera lens element 20, thereby providing OIS. The drive signal can be generated using, for example, resistive feedback control techniques disclosed in any of WO-2013 / 175197, WO-2014 / 076463, WO-2012 / 066285, WO-2012 / 020212, WO-2011 / 104518, WO-2012 / 338703, WO-2010 / 089529 or WO-2010 / 029316 (each of which is incorporated herein by reference).

[0218] As described above, the camera device 1 can be integrated into a portable electronic device (e.g., a mobile phone or tablet). Therefore, a portable electronic device including the camera device 1 is provided. The portable electronic device may include a processor. Super-resolution imaging can be provided in the camera device 1 and / or the portable electronic device. For example, super-resolution imaging can be achieved by combining two or more images captured at positions offset from each other by a sub-pixel distance.

[0219] To this end, the image sensor assembly 6 is controllably moved between two or more positions offset from each other by a subpixel distance in a direction parallel to the photosensitive region 7. Light falling on the pixel center at one position (and thus usable for image capture) therefore falls between pixels at the other position. Control circuitry can drive the SMA actuator line 40 to controllably move the image sensor assembly 6 in this manner. The subpixel distance is a distance smaller than the pixel pitch of the photosensitive region 7. The pixel pitch refers to the distance between the centers of two adjacent pixels.

[0220] The image sensor assembly 6 can be controllably moved to a positional accuracy of 0.5 μm or less. A particular advantage is achieved when the lateral actuator device includes multiple SMA actuator lines 40, as SMA provides high actuation force compared to other types of actuators. This can contribute to the accurate positioning of the image sensor assembly 6 relative to the support structure 2.

[0221] Two or more positions can be stationary positions, so that the image sensor component 6 can stop at each of the two or more positions before moving to the next position. The two or more positions can be offset from each other in the direction along the pixel rows and / or pixel columns of the photosensitive region 7. The two or more positions can include i) one or more positions offset by a sub-pixel distance from the starting position along the pixel rows, and ii) one or more positions offset by a sub-pixel distance from the starting position along the pixel columns. Optionally, the two or more positions can include one or more positions offset by sub-pixel distances from the starting position along both pixel rows and pixel columns.

[0222] Images are captured at each of two or more locations using an image sensor. A controller can control the image sensor to capture images. The controller can be implemented as part of a control circuit on IC chip 30, or as part of another circuit on IC chip 30. Alternatively, the controller can be implemented as part of another IC forming part of camera device 1. Furthermore, alternatively, the controller can be implemented as part of a processor forming part of a portable electronic device.

[0223] The images can then be combined to form a super-resolution image, for example, using a processor in a portable electronic device or the controller described above. The resolution of the super-resolution image is greater than the resolution of a single image captured by an image sensor. For example, two or more images can be combined by interleaving them.

[0224] Other variations

[0225] It should be understood that many other variations of the above embodiments may exist.

[0226] For example, the aforementioned FPC can be used in tilting camera devices for OIS modules as described in WO-2010 / 029316 or WO-2010 / 089529 (each of which is incorporated herein by reference). Such a camera device has a camera unit incorporating an image sensor assembly and a lens mount. The camera unit is tiltable relative to the support structure about two axes perpendicular to each other (e.g., X and Y), and tiltable relative to the main axis passing through the camera device. By using the aforementioned FPC connected to the image sensor assembly included in the tiltable camera unit, at least some of the advantages described above can be achieved, such as less obstruction to the movement of the image sensor assembly during OIS.

[0227] The term shape memory alloy (SMA) actuator wire can refer to any suitably shaped element that includes an SMA. An SMA actuator wire can be elongated and can have a circular or any other cross-section. The cross-section can vary along the length of the SMA actuator wire. It is also possible that the length of the SMA actuator wire (however defined) can resemble one or more of its other dimensions. An SMA actuator wire can be flexible. Therefore, when connected between two elements, the SMA actuator wire may only be able to apply a force that pushes the two elements together, which is applied when the SMA actuator wire is tensioned. Alternatively, an SMA actuator wire can be beam-shaped or rigid. An SMA actuator wire may or may not include materials and / or components that are not SMA.

Claims

1. An actuator assembly, comprising: Support structure; An image sensor assembly, comprising an image sensor having a photosensitive region, the image sensor assembly being suspended on the support structure in a manner that allows the image sensor assembly to move relative to the support structure; as well as At least two flexible printed circuits, each electrically connected at one end to the image sensor assembly. The flexible printed circuit is folded around the image sensor assembly such that the other end of the flexible printed circuit is on the same side of the image sensor assembly. Each flexible printed circuit includes a static portion, the static portion including the other end and parallel to the plane of the image sensor assembly, and In this circuit, at least two of the static portions overlap and / or are adjacent to each other.

2. The actuator assembly according to claim 1, wherein, The image sensor assembly is suspended on the support structure in such a manner that it allows the image sensor assembly to move relative to the support structure in any direction parallel to the plane in which the photosensitive region extends.

3. The actuator assembly according to claim 2, wherein, The image sensor assembly is suspended on the support structure in a manner that allows the image sensor assembly to rotate about any axis orthogonal to the plane in which the photosensitive region extends.

4. The actuator assembly according to claim 1, wherein, Each flexible printed circuit is folded around the corner.

5. The actuator assembly according to claim 4, wherein, Each flexible printed circuit is folded around a 90-degree corner.

6. The actuator assembly of claim 4, wherein, Each flexible printed circuit is folded around a corner that extends along an axis orthogonal to the plane in which the photosensitive region extends.

7. The actuator assembly according to any one of claims 1 to 6, comprising: A device connector configured to connect the actuator assembly to the device.

8. The actuator assembly of claim 7, wherein, At least two of the flexible printed circuits can be electrically connected to the device via the same device connector.

9. The actuator assembly according to any one of claims 1 to 6, wherein, At least two of the flexible printed circuits, located away from the image sensor components, are connected to each other.

10. The actuator assembly according to any one of claims 1 to 6, wherein, At least two of the flexible printed circuits are connected to different sides of the image sensor assembly.

11. The actuator assembly according to any one of claims 1 to 6, wherein, At least two of the flexible printed circuits are connected to the same side of the image sensor assembly.

12. The actuator assembly according to any one of claims 1 to 6, wherein, At least two of the flexible printed circuits are arranged such that they do not overlap each other when they are in their unfolded state.

13. The actuator assembly according to any one of claims 1 to 6, wherein, The flexible printed circuit includes power lines for transmitting power to the image sensor assembly and / or data channels for transmitting data.

14. The actuator assembly of claim 13, wherein, The power line and the data channel are mounted on different flexible printed circuits.

15. The actuator assembly of claim 13, wherein, At least one of the data channels includes a tortuous portion, such that the data channels have substantially the same length as each other.

16. The actuator assembly according to any one of claims 1 to 6, wherein, At least one of the flexible printed circuits includes one or more terminals for connection to one or more actuators.

17. The actuator assembly according to any one of claims 1 to 6, wherein, The image sensor assembly is controllably movable between two or more locations offset from each other by a subpixel distance in a direction parallel to the photosensitive region, such that images captured at the two or more locations can be combined to form a super-resolution image.

18. The actuator assembly according to any one of claims 1 to 6, comprising: The multiple shape memory alloy actuator lines arranged in the configuration, when selectively driven, enable the shape memory alloy actuator lines to move the image sensor assembly relative to the support structure in any direction transverse to the photosensitive region and / or rotate the image sensor assembly about an axis orthogonal to the photosensitive region.

19. The actuator assembly of claim 18, comprising: A control circuit is arranged to drive the shape memory alloy actuator line.

20. The actuator assembly according to any one of claims 1 to 6, wherein, The photosensitive area has a diagonal length of up to 12 mm.

21. The actuator assembly according to any one of claims 1 to 6, comprising a multilayer flexible printed circuit, wherein, The multilayer flexible printed circuit includes at least a first layer and a second layer, wherein the first layer includes one of the at least two flexible printed circuits, and the second layer includes the other of the at least two flexible printed circuits.

22. The actuator assembly of claim 21, wherein, The multilayer flexible printed circuit has an increased length compared to the flexible printed circuit of the reference actuator assembly, in which the at least two flexible printed circuits are substantially separated.

23. The actuator assembly of claim 21, wherein, The multilayer flexible printed circuit includes at least one ground layer, which is configured to reduce electrical interference between one or more layers of the actuator assembly and / or one or more other components.

24. The actuator assembly according to any one of claims 1 to 6, wherein, At least one of the flexible printed circuits includes at least one slit along the length of the flexible printed circuit, wherein the at least one slit divides the length of the flexible printed circuit into at least two parts.

25. The actuator assembly of claim 24, wherein, The at least one slit runs along a major portion of the length of the flexible printed circuit, which runs perpendicular to the plane of the image sensor assembly along the major portion.

26. The actuator assembly of claim 1, wherein, The static portion of each of the at least two flexible printed circuits is connected to the image sensor via a movable portion that is generally parallel to the plane of the image sensor assembly.

27. The actuator assembly of claim 26, wherein, The at least two flexible printed circuits are not adhered to each other or to the support structure between the moving part and the image sensor assembly.

28. The actuator assembly according to any one of claims 1 to 6, wherein, The image sensor assembly includes a printed circuit board, wherein at least one of the flexible printed circuits is directly connected to the printed circuit board without being mechanically connected to any other component of the image sensor assembly.

29. A camera device, comprising: The actuator assembly according to claim 1; as well as A lens assembly comprising at least one lens arranged to focus an image onto the photosensitive region, the lens assembly being mounted on the support structure.

30. The camera device according to claim 29, wherein, At least a majority portion of the flexible printed circuit folded around the image sensor assembly is located between the top of the image sensor assembly and the lens assembly in a direction perpendicular to the plane of the image sensor assembly.

31. The camera device according to claim 29, wherein, The lens assembly includes: Lens holder, the lens being supported on the lens holder in a manner that allows the lens to move along its optical axis; and An autofocus actuator device is arranged to move the lens along the optical axis relative to the lens holder.

32. The camera device according to claim 31, wherein, The autofocus actuator device is electrically connected to one or more terminals of the flexible printed circuit via the support structure.

33. The camera device according to claim 32, wherein, The autofocus actuator device is electrically connected to the one or more terminals via wiring around at least two sides of the image sensor assembly.

34. The camera device according to claim 32 or 33, wherein, The autofocus actuator device is electrically connected to one or more terminals via multiple wires, wherein each wire extends around at least two sides of the image sensor assembly.

35. The camera device according to claim 32 or 33, wherein, The autofocus actuator device is electrically connected to one or more terminals through multiple layers of the support structure.

36. The camera device according to claim 32 or 33, wherein, The autofocus actuator device is electrically connected to the one or more terminals via multiple layers of the support structure stacked on the conductor layer of the support structure, the conductor layer of the support structure including data channels configured to transmit data.

37. The camera device according to claim 35, wherein, The autofocus actuator device is electrically connected to the one or more terminals via the layers, at least one of the layers comprising two electrically isolated portions, each portion being configured to electrically connect the autofocus actuator device to one of the terminals.

38. The camera device according to claim 31, wherein, One of the flexible printed circuits includes an arm electrically connected to the autofocus actuator device, such that the autofocus actuator device is electrically connected to one or more terminals of the flexible printed circuit via the arm.

39. The camera device according to claim 38, wherein, The arm extends from one side of the flexible printed circuit, and the one or more terminals are arranged along an axis orthogonal to the plane in which the photosensitive region extends on the opposite side of the flexible printed circuit.

40. The camera device according to claim 38, wherein, The arm extends around at least two sides of the image sensor assembly.

41. The camera device of claim 31, comprising at least one additional flexible printed circuit folded around the image sensor assembly to electrically connect the autofocus actuator device to one or more terminals of the flexible printed circuit.

42. The camera device according to claim 41, wherein, When viewed along an axis orthogonal to the plane in which the photosensitive region extends, the at least one additional flexible printed circuit is completely overlapped by the support structure.

43. The camera device according to claim 31, wherein, The autofocus actuator device is electrically connected to one or more terminals of the flexible printed circuit via a printed circuit, the printed circuit including a curved portion surrounding the edge of at least one of the flexible printed circuits.

44. The camera device according to claim 43, wherein, The connection between the printed circuit and the autofocus actuator device is covered by at least one of the flexible printed circuits.

45. The camera device according to claim 43, wherein, The printed circuit also includes one or more additional terminals connected to the connection between the printed circuit and the autofocus actuator device, wherein the one or more additional terminals are located on the side of the autofocus actuator device opposite to the connection between the printed circuit and the autofocus actuator device.

46. ​​The camera device according to claim 29, wherein, The lens assembly includes a lens actuator device arranged to move the lens perpendicular to the optical axis.

Images