Camera modules and electronic equipment

Abstract

The embodiment of the present application provides a camera module and electronic device, wherein the camera module is used to be installed in the electronic device, and the camera module includes: a bracket, an optical image stabilization motor, an autofocus motor, a reflective prism, a lens, and a lens mount; the reflective prism is arranged in the optical image stabilization motor, the lens is arranged in the autofocus motor, the lens and the lens mount are connected, the optical image stabilization motor, the autofocus motor, and the lens mount are arranged in the bracket and arranged in sequence in a first direction, the first direction being the optical axis direction of the lens, and the plane where the lens mount is located is arranged perpendicular to the optical axis direction; the lens includes a plurality of lenses arranged in sequence from the light input side to the light output side, the side of the lens facing the reflective prism is the light input side, and the first lens is closer to the light input side among the plurality of lenses, and the aperture of the lens is arranged on the peripheral side of the first lens or on the side of the first lens facing the reflective prism. The embodiment of the present application provides a camera module and electronic device, which can reduce the stacking height.

Description

Technical Field

[0001] The present application relates to the technical field of electronic equipment, and in particular to a camera module and electronic equipment. Background Art

[0002] With the increasing popularity of electronic devices, users have increasingly demanded higher aesthetics, leading to a trend toward thinner electronic devices, such as smartphones. To enable electronic devices to incorporate telephoto camera functionality without increasing their thickness, periscope camera modules can be configured with the optical axis of the lens perpendicular to the thickness of the device. For periscope camera modules, the size of the lens affects the stacking height of the module, which in turn affects the thickness of the device. Summary of the Invention

[0003] The embodiments of the present application provide a camera module and an electronic device that can reduce the stacking height.

[0004] In one aspect, an embodiment of the present application provides a camera module for installation in an electronic device, the camera module comprising: a bracket, an optical image stabilization motor, an autofocus motor, a reflective prism, a lens, and a lens mount;

[0005] The reflective prism is disposed in the optical image stabilization motor, the lens is disposed in the autofocus motor, the lens and the lens mount are connected, the optical image stabilization motor, the autofocus motor and the lens mount are disposed in the bracket and are arranged in sequence in a first direction, the first direction being the optical axis direction of the lens, and the plane on which the lens mount is located is disposed perpendicular to the optical axis direction;

[0006] The lens includes multiple lenses arranged in sequence from the light input side to the light output side. The side of the lens facing the reflective prism is the light input side. The lens closest to the light input side among the multiple lenses is the first lens. The aperture of the lens is arranged on the peripheral side of the first lens or on the side of the first lens facing the reflective prism.

[0007] An embodiment of the present application provides a camera module, which can reduce the lens aperture by moving the lens aperture of the periscope camera module forward compared to the central aperture. At the same time, due to the reduction in the lens aperture, the size required for the reflective prism can be reduced synchronously, thereby reducing the stacking height of the periscope camera module.

[0008] In a possible implementation, the aperture of the diaphragm is equal to the aperture of the first lens.

[0009] When the aperture of the diaphragm is set to be equal to the aperture of the first lens, the entrance pupil aperture is equal to the aperture of the first lens, and there is no off-axis light offset. When the entrance pupil aperture is a certain value, the aperture of the first lens can be reduced, thereby reducing the lens aperture and the required size of the reflecting prism, and reducing the stacking height of the camera module.

[0010] In a possible implementation, the lens includes a lens barrel and a plurality of lenses disposed in the lens barrel, the aperture entity is a limiting surface of an inner wall of the lens barrel, and the limiting surface is disposed on a peripheral side of a first lens.

[0011] By setting the inner wall surface of the lens barrel as the limiting surface, the aperture of the diaphragm and the aperture of the first lens can be made equal, and the structure is easy to realize.

[0012] In a possible implementation, the light incident surface side of the camera module includes a main body area and a sinking area. The sinking area is arranged around the main body area, and the height of the sinking area is smaller than the height of the main body area.

[0013] Providing a sunken area is conducive to forming an accommodation space after the camera module is assembled, which is used to install other structural parts, thereby reducing the stacking height of the camera module and improving the compactness of the structure.

[0014] In a possible implementation, the camera module further includes a structural component, which is installed on the sunken area. The structural component includes a sealing component or an antenna bracket.

[0015] Setting up a seal can be used to seal the camera module and the back cover and act as a buffer. Setting up an antenna bracket can increase the number of antennas and improve antenna performance. By installing structural parts in the sunken area, the stacking height of the camera module can be reduced and the structural compactness can be improved.

[0016] In a possible implementation, a first sinking area, a second sinking area, and a third sinking area are respectively provided on the optical image stabilization motor, the autofocus motor, and the lens mount.

[0017] Correspondingly setting sunken areas on the optical image stabilization motor, autofocus motor, and lens mount can increase the area of ​​the sunken areas and improve space utilization.

[0018] In a possible implementation manner, the edge of the bracket is flush with the surface where the sunken area is located.

[0019] The bracket can avoid structural parts, increase the volume of the accommodating space between the camera module and the back cover, and facilitate the stacking of structural parts.

[0020] In a possible implementation, the height difference between the sinking area and the main body area is 1 mm-2 mm.

[0021] The height difference between the sunken area and the main body area can be 1mm-2mm, which can achieve the effect of reducing the stacking height of the entire machine by 1mm-2mm.

[0022] In one possible embodiment, the camera module further includes a reinforcing plate, a first reinforcing adhesive, a second reinforcing adhesive and a Mylar sheet. The circumference of the reinforcing plate is bonded to the bottom of the optical image stabilization motor by the first reinforcing adhesive, and the Mylar sheet is attached to the reinforcing plate by the second reinforcing adhesive.

[0023] Setting up this reinforcement structure can enhance the stability of the position of the optical image stabilization motor's position sensor relative to the motor's mover, ensuring the stability of the optical image stabilization motor's performance; and it can also reduce the stacking size and avoid surface breakage problems caused by the injection molding process.

[0024] In a possible implementation manner, the Mylar sheet is copper foil.

[0025] Setting copper foil as the Mylar sheet can not only play a reinforcing and buffering role, but also improve the heat dissipation efficiency.

[0026] In a possible implementation, the sum of the thicknesses of the second reinforcing adhesive and the Mylar sheet is less than or equal to 0.1 mm.

[0027] The camera module is reinforced with reinforcing glue and Mylar sheets, and the reinforcement height is extremely small, which can effectively reduce the overall stacking height of the camera module.

[0028] In a possible embodiment, the camera module further includes a substrate, and the optical image stabilization motor, the autofocus motor, and the lens mount are respectively connected to the substrate. The substrate is arranged in the bracket, and the plane where the substrate is located is perpendicular to the plane where the lens mount is located.

[0029] The setting of the substrate position is conducive to the reasonable arrangement of the overall structure of the camera module and can reduce the overall volume of the camera module.

[0030] On the other hand, an embodiment of the present application provides an electronic device, including a back cover and the above-mentioned camera module, wherein a camera installation area is provided on the back cover, and the camera module is installed in the camera installation area.

[0031] The embodiments of the present application provide a camera module and an electronic device. On the one hand, the aperture of the lens can be reduced by moving the diaphragm of the lens forward to reduce the size of the lens and the reflective prism, that is, the stacking height of the module can be reduced from the structural design aspect. On the other hand, a sunken step structure can be provided around the camera module, and the sunken step structure is used to cooperate with the back cover and can be stacked with other structural parts, that is, the stacking height of the module can be reduced from the stacking cooperation aspect. On the other hand, by providing a three-layer reinforcement structure of a reinforcement plate, a reinforcement glue and a Mylar sheet at the bottom of the optical image stabilization motor, the stacking thickness of the reinforcement structure at the bottom of the optical image stabilization motor can be reduced, that is, the stacking height of the module can be reduced from the process processing aspect, thereby providing a compact periscope camera module, which can reduce the stacking height of the entire electronic device and is conducive to the thin design of the electronic device. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 A schematic diagram of the structure of an electronic device provided in one embodiment of the present application;

[0033] Figure 2 A schematic diagram of the exploded structure of an electronic device provided in one embodiment of the present application;

[0034] Figure 3 A schematic structural diagram of a camera module provided in one embodiment of the present application;

[0035] Figure 4 An exploded view of a camera module provided in one embodiment of the present application;

[0036] Figure 5 A schematic diagram of the structure of a lens provided in one embodiment of the present application;

[0037] Figure 6 A schematic diagram showing the positional relationship between the front aperture and the lens aperture provided in one embodiment of the present application;

[0038] Figure 7 A schematic diagram showing the positional relationship between the center diaphragm and the lens aperture provided for related technologies;

[0039] Figure 8 A schematic structural diagram of a camera module and a portion of a back cover provided in one embodiment of the present application;

[0040] Figure 9 This is an exploded schematic diagram of a camera module, part of the back cover, and some structural components provided in one embodiment of the present application;

[0041] Figure 10 This is an exploded schematic diagram of a camera module and some structural components provided in one embodiment of the present application;

[0042] Figure 11 A schematic diagram of the structure of an optical image stabilization motor, an autofocus motor, and a lens mount provided in one embodiment of the present application;

[0043] Figure 12 A schematic structural diagram of a camera module provided by an embodiment of the present application from another angle;

[0044] Figure 13 This is a schematic diagram of an exploded view of the Mylar sheet and reinforcing adhesive provided in one embodiment of the present application;

[0045] Figure 14 A schematic diagram of the assembly process of the Mylar sheet provided in one embodiment of the present application;

[0046] Figure 15 The corresponding drop reliability compression ratio distribution diagram when the reinforcement structure is set using the injection molding process is provided for related technologies;

[0047] Figure 16 This is a drop reliability compression ratio distribution diagram corresponding to a three-layer reinforcement structure provided in an embodiment of the present application.

[0048] Description of reference numerals:

[0049] 100-electronic device; 11-back cover; 111-camera installation area; 112-light hole; 12-middle frame; 13-display screen; 200-camera module; 201-main body area; 202-sunk area; 21-bracket; 22-optical image stabilization motor; 2202-first sinking area; 23-autofocus motor; 2302-second sinking area; 24-reflective prism; 25-lens; 251-lens barrel; 252-lens; 253-limiting surface; 26-lens mount; 2602-third sinking area; 27-substrate; 271-flexible circuit board; 272-board-to-board connector; 28-mylar sheet; 291-reinforcement plate; 292-first reinforcing adhesive; 293-second reinforcing adhesive. DETAILED DESCRIPTION

[0050] The following embodiments of the present application provide an electronic device, including but not limited to mobile phones, tablet computers, laptop computers, ultra-mobile personal computers (UMPCs), handheld computers, walkie-talkies, netbooks, POS machines, personal digital assistants (PDAs), wearable devices, virtual reality devices, wireless USB flash drives, Bluetooth speakers, Bluetooth headsets, or vehicle-mounted devices, etc., which have cameras.

[0051] In the embodiments of the present application, a mobile phone is taken as an example of the above-mentioned electronic device to specifically illustrate the structure of the electronic device.

[0052] It should be noted that in the various drawings of the embodiments of the present application, the X-axis can be defined as the length direction of the electronic device 100, the Y-axis can be defined as the width direction of the electronic device 100, and the Z-axis can be defined as the thickness direction of the electronic device 100. More specifically, the positive direction of the X-axis can be defined as the bottom-to-top direction on the display surface when the user uses the electronic device 100, the positive direction of the Y-axis can be defined as the right-to-left direction on the display surface when the user uses the electronic device 100, and the positive direction of the Z-axis can be defined as the direction from the display surface of the electronic device 100 to the back surface.

[0053] Figure 1 This is a schematic diagram of the structure of an electronic device provided in one embodiment of the present application. Figure 2 This is a schematic diagram of the exploded structure of an electronic device provided in one embodiment of the present application. Figure 1 and Figure 2As shown, the electronic device 100 may include a middle frame 12, a back cover 11, and a display screen 13 connected to both sides of the middle frame 12. The display screen 13, the middle frame 12, and the back cover 11 collectively form a storage space within which a printed circuit board, a battery, a camera module 200, and other electronic components may be placed. When the user is using the electronic device 100, the display screen 13 is placed facing the user as the display surface, while the back cover 11 is placed away from the user.

[0054] Among them, the display screen 13 can be a liquid crystal display (LCD) screen, an organic light emitting diode (OLED) display screen, etc. It should be understood that the display screen 13 may include a display and a touch device, the display is used to output display content to the user, and the touch device is used to receive the user's touch operation on the display screen 13. The middle frame 12 can be made of metal, ceramic, glass and other materials, and the back cover 11 can be made of metal, ceramic, glass and other materials. The middle frame 12 and the back cover 11 can be formed separately and fixed by welding, clamping, bonding and other methods; or, the middle frame 12 and the back cover 11 can also be formed as one piece. The back cover 11 made of metal, ceramic or glass and other materials can meet the requirements of gloss, fashion and aesthetics of the appearance of electronic equipment.

[0055] A camera module 200 may also be provided in the electronic device 100 to implement a shooting function. The camera module 200 may be used as a front camera or a rear camera of the electronic device 100. Taking the rear camera as an example, a camera mounting area 111 is provided on the rear cover 11. The camera mounting area 111 may be formed by opening a hole in the rear cover 11 and connecting a decorative part and a transparent cover in the hole. The camera module 200 may be connected to a printed circuit board in the electronic device 100, and external light may enter the camera module 200 through the camera mounting area 111, or the light emitted by the camera module 200 may be transmitted through the camera mounting area 111 to the external environment.

[0056] Among them, the shape of the camera installation area 111 is not specifically limited in this embodiment, and can be, for example, rectangular, circular, rounded rectangular, elliptical, ring-shaped, runway-shaped, and the like. A plurality of camera modules 200 can be arranged in the camera installation area 111, and the types of the camera modules 200 can include, for example, periscope camera modules, ultra-wide-angle camera modules, black and white camera modules, depth camera modules, macro camera modules, and the like. The arrangement of the plurality of camera modules 200 in the camera installation area 111 is not specifically limited in the embodiment of the present application. The camera installation area 111 can be set at any position on the back cover 11, for example, at the upper center position of the back cover 11, the upper right corner position, or as Figure 1 and Figure 2Near the upper left corner.

[0057] Currently, electronic devices 100 are designed for large screens and narrow bodies. This requires the camera module 200 to have a higher optical zoom, higher-resolution imaging, and more stable anti-shake capabilities. These increased camera quality requirements necessitate a larger size and height for the camera module 200, which conflicts with the trend toward thinner designs for electronic devices 100.

[0058] In one possible implementation, a periscope camera module can be provided to balance the camera quality requirements of the camera module 200 with the thinness of the electronic device 100. The optical axis of the lens of the periscope camera module is perpendicular to the thickness direction of the electronic device 100, which can reduce the thickness of the electronic device 100 while providing the electronic device 100 with the function of a telephoto camera.

[0059] For a periscope camera module, the size of the lens affects the module's stacking height (i.e., the stacking height in the thickness direction of the electronic device 100), thereby affecting the thickness of the electronic device 100. Given a given focal length and other performance characteristics of the periscope camera module, the lens size must meet optical performance requirements. Reducing the lens size is very difficult, meaning that it is difficult to further reduce the stacking height of the periscope camera module.

[0060] In related art, to address the conflict between a thin body and the camera module's height, a method has been employed to visually reduce the protrusion of the camera module 200. For example, if the camera module 200 protrudes relative to the rear cover 11, the camera decorative piece on the camera mounting area 11 that protrudes relative to the rear cover 11 can be designed black or with other designs that reduce the visual protrusion effect, thereby reducing the visual effect of the camera module 200's protrusion. However, in this case, the module structure design of the camera module 200 itself does not reduce the stacking height of the modules. Although the visual protrusion is reduced, the actual protrusion effect is still very obvious.

[0061] In another related technology, the stacking height can be reduced by designing the components in the camera module 200 as two-in-one or multi-in-one. For example, the circuit board and other structures in the camera module 200 can be integrated with the injection molded parts using an injection molding process to reduce the overall size while increasing the strength of the components. However, the two-in-one injection molding method has high process requirements and is difficult to implement, resulting in low production efficiency and high costs. In addition, the two-in-one injection molding process has a certain thickness design bottom line, which may still not meet the requirements of reducing the stacking thickness.

[0062] Based on the above problems, an embodiment of the present application provides a camera module and an electronic device. By moving the lens aperture of the periscope camera module forward, the lens aperture can be reduced compared to the central aperture. At the same time, due to the reduction in the lens aperture, the size required for the reflective prism can be reduced synchronously, so that the stacking height of the periscope camera module is reduced, thereby reducing the thickness of the electronic device.

[0063] Below, the structure of the camera module provided in the embodiment of the present application is described in detail with reference to the accompanying drawings and specific embodiments. In the embodiment of the present application, a periscope camera module used in a mobile phone is taken as an example.

[0064] Figure 3 This is a structural diagram of a camera module provided in one embodiment of the present application. Figure 4 This is an exploded view of a camera module provided in one embodiment of the present application. Figure 3 and Figure 4 As shown, an embodiment of the present application provides a camera module 200, which may include a bracket 21, an optical image stabilization (OIS) motor 22, an automatic focus (AF) motor 23, a reflective prism 24, a lens 25, a lens mount 26 and a substrate 27.

[0065] Among them, the reflecting prism 24 can be set in the optical image stabilization motor 22, the lens 25 can be set in the autofocus motor 23, the lens 25 can be connected to the lens mount 26, the optical image stabilization motor 22, the autofocus motor 23 and the lens mount 26 can be set in the bracket 21 and arranged in sequence in a first direction, the first direction is the optical axis direction of the lens 25, that is, the Y direction in the figure, and the plane where the lens mount 26 is located is perpendicular to the optical axis direction of the lens 25.

[0066] The light-entering surface of the camera module 200 is the surface facing the rear cover 11, i.e., the top surface of the camera module 200 in the figure. The light-emitting surface of the camera module 200 is perpendicular to the optical axis of the lens 25 and can be the plane on which the lens holder 26 is located. The imaging process of the camera module 200 can be as follows: after light enters the camera module 200 from the light-entering surface, it is first reflected by the reflective prism 24 to change the light path, then propagates along the optical axis of the lens 25 and enters the lens holder 26. The lens holder 26 can be provided with a photosensitive chip, and the light is irradiated on the photosensitive chip to form an image.

[0067] The autofocus motor 23 is used to move the lens 25 along the optical axis, thereby changing the distance between the lens 25 and the lens mount 26 to achieve focusing. The optical image stabilization motor 22 is used to drive the reflective prism 24 to flip, thereby adjusting the position of the incident light relative to the optical axis of the autofocus motor 23 to compensate for the camera module 200 shaking during shooting, thereby achieving image stabilization.

[0068] Both the optical image stabilization motor 22 and the autofocus motor 23 can be configured as voice coil motors. A voice coil motor can include a magnet and a coil that moves relative to the magnet. By passing different currents through the coil, the magnetic force between the coil and the magnet can be controlled, thereby controlling the force and producing the desired displacement. The specific structures of the optical image stabilization motor 22 and the autofocus motor 23 are not specifically described in this embodiment.

[0069] The camera module 200 can be a rectangular parallelepiped. In one possible arrangement, the length, width, and height of the camera module 200 can correspond to the Y, X, and Z directions in the figure, respectively, that is, they can correspond to the width, length, and thickness of the electronic device 100. The side of the camera module 200 facing the back cover 11 of the electronic device 100, that is, the top surface of the camera module 200, is the light-entering side.

[0070] The bracket 21 can be configured as a rectangular frame structure formed by four sidewalls, with the top and bottom surfaces of the rectangular frame structure being open. The optical image stabilization motor 22, autofocus motor 23, lens mount 26, and base plate 27 can be fixedly connected within the bracket 21. The method of fixed connection is not specifically limited in this embodiment of the application, and can be, for example, a snap-on connection, a screw connection, an adhesive connection, etc.

[0071] The substrate 27 can be a printed circuit board (PCB). The substrate 27 can be set between the optical image stabilization motor 22, the autofocus motor 23, the lens holder 26 and the side wall of the bracket 21. The substrate 27 can be electrically connected to the optical image stabilization motor 22, the autofocus motor 23, and the lens holder 26 respectively, and the substrate 27 can be connected to a flexible printed circuit (FPC) 271. The flexible printed circuit 271 extends out of the bracket 21 and the end can be connected to a board-to-board (BTB) connector 272 for snapping onto the motherboard inside the electronic device 100.

[0072] In the embodiment of the present application, on the one hand, the overall stacking height of the camera module 200 can be reduced by moving the aperture of the lens 25 forward.

[0073] It should be noted that an aperture refers to an entity that limits the light beam in an optical system, such as the edge of a lens, a frame, or a specially designed screen with holes. Apertures can include apertures and field stops. Apertures limit the size of the imaging beam at a point on the optical axis, while field stops limit the size of the imaging range. The apertures mentioned in the embodiments of this application below refer to apertures.

[0074] Figure 5This is a schematic diagram of the structure of a lens provided in one embodiment of the present application. Figure 6 This is a schematic diagram of the positional relationship between the aperture and the lens aperture provided in one embodiment of the present application. Figure 5 and Figure 6 As shown, in the embodiment of the present application, the lens 25 may include a lens barrel 251 and a plurality of lenses 252 disposed within the lens barrel 251. The plurality of lenses 252 are sequentially arranged within the lens barrel 251 along the optical axis of the lens from the light input side to the light output side. The light input side of the lens 25 is defined as the front side, and the light output side is defined as the rear side. The plurality of lenses 252 are sequentially arranged from the light input side to the light output side, and the lens at the frontmost side may be defined as the first lens.

[0075] In the embodiment of the present application, the lens aperture G can be disposed near the light-entering side of the lens barrel 251, that is, the aperture G can be placed in front, rather than being disposed between the two lenses 252. The lens aperture G can be disposed, for example, on the peripheral side of the first lens, or on the front side of the first lens, that is, on the side of the lens 252 facing the reflective prism 24.

[0076] It should be understood that the entrance pupil aperture refers to the effective aperture that limits the incident light beam. The entrance pupil is the image of the diaphragm on the optical system in front of it. The entrance pupil aperture is the equivalent aperture of the diaphragm in object space. Entrance pupil aperture = effective focal length / relative aperture, where the effective focal length is EFL (Effective Focal Length) and the relative aperture is FNO (F-Number). For a camera module 200 with established optical characteristics, the entrance pupil aperture is a fixed value.

[0077] Taking the example of setting the aperture G on the peripheral side of the first lens, refer to Figure 6 As shown, the aperture of the diaphragm is the same as the aperture d2 of the first lens. At this time, there is no off-axis light offset, and the entrance pupil aperture d1 is consistent with the aperture of the diaphragm. Therefore, the entrance pupil aperture d1 = the aperture d2 of the first lens.

[0078] Figure 7 A schematic diagram of the positional relationship between the central aperture and the lens aperture provided for related technologies. Figure 7 As shown, in related art, aperture G is located in the middle of lens 25, between adjacent lens elements 252. Its physical structure can be an optical light shield. When aperture G is centered, the aperture of the first lens element is the entrance pupil diameter plus the off-axis light offset. In the figure, d3 represents the entrance pupil diameter, and d4 represents the aperture of the first lens element, with d4 being greater than d3.

[0079] contrast Figure 6 and Figure 7As can be seen, when the entrance pupil diameter is constant, the front aperture reduces the aperture of the first lens element compared to the center aperture, and the aperture size of the lens 25 can be reduced by 10% to 20%. At the same time, due to the reduction in the aperture of the lens 25, the required size of the reflective prism 24 can be simultaneously reduced. For a periscope camera module, the reduced size of the lens 25 and the reflective prism 24 reduces the overall stacking height of the module. Furthermore, the reduced size of the reflective prism 24 facilitates the drive control of the optical image stabilization motor 22 and the stability of the bonding of the reflective prism 24.

[0080] It should be understood that when the aperture is arranged on the peripheral side of the first lens, Figure 5 As shown, the aperture entity can be a limiting surface 253, which is the inner wall surface of the lens barrel 251 located on the peripheral side of the first lens. The diameter of the limiting surface 253 can remain consistent, and the width of the limiting surface 253 is not specifically limited in the embodiment of the present application. For example, it can be less than 0.5 mm. The influence of the width of the limiting surface 253 on the light can be ignored in the embodiment of the present application.

[0081] It should be noted that the aperture can also be set on the front side of the first lens, that is, on the side of the first lens facing the reflecting prism 24. At this time, the aperture entity can be the inner wall surface of the lens barrel 251 located on the front side of the first lens, or it can be a structure such as a light-shielding plate set on the front side of the lens barrel 251.

[0082] In the embodiment of the present application, on the other hand, a sunken step structure can be provided around the camera module 200. The sunken step structure is used to cooperate with the back cover 11 and can be stacked with other structural parts, thereby reducing the stacking height of the entire electronic device.

[0083] Figure 8 This is a structural diagram of a camera module and a back cover provided in one embodiment of the present application. Figure 9 This is an exploded schematic diagram of a camera module, a back cover, and structural components provided in one embodiment of the present application. Figure 10 This is a schematic diagram of the exploded camera module and structural components provided in one embodiment of the present application. It should be understood that Figures 8-10 In the figure, only the partial structure of the back cover 11 and the structural member 300 is shown, so that the matching relationship between the back cover 11, the structural member 300 and the camera module 200 can be more clearly understood from the figure.

[0084] refer to Figures 8-10As shown, when the camera module 200 is assembled in the electronic device 100, the top surface of the camera module 200 is mated and connected to the back cover 11, and the camera module 200 is arranged facing the camera mounting area 111. The camera mounting area 111 can be provided with a light hole 112, and the reflective prism 24 is arranged facing the light hole 112, so that external light can enter the camera module 200 through the light hole 112 and can be smoothly reflected by the reflective prism 24 to the lens 25.

[0085] A structural member 300 can be disposed between the camera module 200 and the back cover 11. There are various implementations of this structural member 300, including a sealant or antenna bracket. The shape of the structural member 300 shown in the figure is merely an example. In one possible implementation, the structural member 300 can include a sealant, such as foam, to seal the camera module 200 and the back cover 11 and provide a cushioning effect.

[0086] In another possible embodiment, the structural member 300 may further include an antenna bracket, which may be manufactured using Laser Direct Structuring (LDS) technology or by embedding metal parts on a plastic bracket to form an antenna. Disposing the antenna bracket between the camera module 200 and the back cover 11 to serve as the antenna of the electronic device can, on the one hand, increase the number of antennas in the electronic device 100 and improve antenna diversity; on the other hand, the camera decorative parts and transparent cover plate provided in the camera mounting area 11, as well as the electronic components and metal parts within the electronic device 100, are less likely to interfere with the antenna, thereby improving antenna performance.

[0087] The camera module 200 may include a main body area 201 and a sinking area 202. The main body area 201 may be Figure 10 The area within the dotted box, the sinking area 202 is as follows Figure 10 The area outside the dotted box. The sunken area 202 can be set around the main area 201. The sunken area 202 is recessed relative to the main area 201, and there is a height difference. The height of the camera module 200 in the sunken area 202 is less than the height in the main area 201.

[0088] When the camera module 200 and the back cover 11 are mated, a space is formed between the sunken area 202 and the back cover 11 to accommodate the structural member 300. The structural member 300 can be sandwiched between the sunken area 202 and the back cover 11, or the structural member 300 can be fixedly connected to the sunken area 202, or the structural member 300 can be fixed to the back cover 11.

[0089] It should be understood that by setting a sunken area 202 on the camera module 200, the space between the sunken area 202 and the back cover 11 can be used to stack structural parts 300, thereby, on the one hand, reducing the stacking height of the entire machine, and on the other hand, helping to improve the structural compactness of the entire machine.

[0090] Figure 11 This is a schematic diagram of the structure of the optical image stabilization motor, autofocus motor and lens mount provided in one embodiment of the present application. Figure 11 As shown, the optical image stabilization motor 22 may be provided with a first sunken area 2202, which may be located on a side of the optical image stabilization motor 22 facing away from the autofocus motor 23. The autofocus motor 23 may be provided with a second sunken area 2302, which may be located on both sides of the motor in its longitudinal direction. The lens mount 26 may be provided with a third sunken area 2602, which may be located on both sides of the lens mount 26 in its longitudinal direction.

[0091] The first sunken area 2202, the second sunken area 2302, and the third sunken area 2602 collectively constitute the sunken area 202. These three sunken areas can be connected or spaced apart. The sunken area 202 can occupy the entire length of the main area 201 or only a portion of the length. By providing corresponding sunken areas on the optical image stabilization motor 22, the autofocus motor 23, and the lens mount 26, the area of ​​the sunken area can be increased, improving space utilization.

[0092] It should be noted that after setting the sunken area, the volume of the optical image stabilization motor 22, the autofocus motor 23, and the lens mount 26 are reduced. At this time, the internal structure of the optical image stabilization motor 22, the autofocus motor 23, and the lens mount 26 can be adaptively improved. When the internal structure is more compact, the sunken area is realized in appearance. The specific improvement of the internal structure will not be described in detail in the embodiments of this application.

[0093] In a possible implementation, the height difference between the sunken area 202 and the main body area 201 may be 1 mm-2 mm, which can achieve the effect of reducing the stacking height of the entire device by 1 mm-2 mm.

[0094] In addition, it should be noted that the edge of the bracket 21 can be flush with the surface where the sunken area 202 is located, so that the bracket 21 can avoid the structural member 300, increase the accommodating space between the camera module 200 and the back cover 11, and facilitate the stacking of the structural member 300.

[0095] In an embodiment of the present application, on the other hand, by providing a three-layer reinforcement structure of a reinforcement plate, thermosetting adhesive and Mylar sheet at the bottom of the optical image stabilization motor 22, the stacking thickness of the reinforcement structure at the bottom of the optical image stabilization motor 22 can be reduced, thereby reducing the overall stacking height of the camera module 200.

[0096] Figure 12 This is a structural diagram of a camera module provided by an embodiment of the present application from another angle. Figure 13 This is a schematic diagram of the decomposition of the Mylar sheet and reinforcing adhesive provided in one embodiment of the present application. Figure 14 This is a schematic diagram of the assembly process of the Mylar sheet provided in one embodiment of the present application. Figure 12-14 As shown, the camera module 200 provided in the embodiment of the present application may further include a Mylar sheet 28. The Mylar sheet 28 may be arranged at the bottom of the camera module 200, that is, on the side away from the light-entering surface. The Mylar sheet 28 is used to enhance the overall performance stability of the camera module 200.

[0097] Specifically, a position sensor, such as a Hall sensor, is provided at the bottom of the optical image stabilization motor 22 to detect the position of a mover in the optical image stabilization motor 22 to improve the anti-shake performance of the optical image stabilization motor 22 .

[0098] To enhance the stability of the position sensor of the optical image stabilization motor 22 relative to the motor's actuator, insert molding can be used to increase the thickness of the structural components at the bottom of the optical image stabilization motor 22 for reinforcement. However, this method of reinforcement not only suffers from surface breakage caused by the injection molding process, but also requires a stack thickness exceeding 0.25mm to achieve sufficient reinforcement performance. This large reinforcement height is not conducive to reducing the overall stack height.

[0099] In the embodiment of the present application, the reinforcement structure at the bottom of the optical image stabilization motor 22 may include a reinforcement plate 291, a first reinforcement adhesive 292, a second reinforcement adhesive 293, and a Mylar sheet 28. The reinforcement structure may be installed by first attaching and securing the reinforcement plate 291 to the bottom of the optical image stabilization motor 22, with the reinforcement plate 291 shielding the position sensor. Then, the first reinforcement adhesive 292 is applied around the reinforcement plate 291 to secure the reinforcement plate 291 to the bottom of the optical image stabilization motor 22. After the first reinforcement adhesive 292 has cured, a further layer of the second reinforcement adhesive 293 may be applied to the bottom of the optical image stabilization motor 22 (including the reinforcement plate 291 and the first reinforcement adhesive 292). Finally, the Mylar sheet 28 is attached and secured by the second reinforcement adhesive 293.

[0100] The purpose of providing this reinforcement structure is to enhance the stability of the position sensor of the optical image stabilization motor 22 relative to the motor rotor, thereby ensuring the stability of the performance of the optical image stabilization motor 22. Compared to the related art method of using injection molding for reinforcement, the reinforcement solution proposed in the embodiments of this application has a smaller stacking size. By adding the first reinforcing adhesive 292, the second reinforcing adhesive 293, and the Mylar sheet 28, the overall stacking height does not exceed 1mm. Compared to the related art method of using in-mold injection molding for reinforcement, the overall reinforcement height can be reduced by 0.2mm, to only 0.1mm, and the surface cracking caused by the injection molding process can be avoided.

[0101] Especially after the overall architecture of the camera module 200 and electronic device 100 is determined, the space reserved for reinforcement below the optical image stabilization motor 22 is extremely small, possibly less than or equal to 0.1mm. In this case, the space reserved for reinforcement using an injection molding process is far from sufficient and cannot meet the required compression ratio. However, using the reinforcement structure of the embodiment of the present application, the thickness of the Mylar sheet 28 can be set within the range of 0.03mm, and the thickness of the first and second reinforcing adhesives 292 and 293 can also be set within the range of 0.03mm, and the overall reinforcement height can be achieved to no more than 1mm.

[0102] The reinforcing structure, consisting of reinforcing plate 291, first reinforcing adhesive 292, second reinforcing adhesive 293, and Mylar sheet 28, not only provides reinforcement but also provides cushioning. Reinforcing plate 291 increases structural strength and can be constructed of steel. Mylar sheet 28 provides cushioning and heat dissipation and can be made of graphite, foam, steel, or other materials. In one embodiment, Mylar sheet 28 can be copper foil.

[0103] The first reinforcing adhesive 292 is primarily used to secure the reinforcing plate 291 and can be a thermosetting adhesive. The second reinforcing adhesive 293 needs to provide both reinforcement and cushioning, and therefore has certain requirements for its elastic modulus, hardness, curing shrinkage, and density. In one possible embodiment, the elastic modulus of the second reinforcing adhesive 293 is 1609 MPa at 25°C, 19.83 MPa at 50°C, and 12.44 MPa at 80°C. Its hardness is 67, its curing shrinkage is 0.78%, and its density is 1.24.

[0104] In addition, it should be added that the Mylar sheet 28 can cover the bottom of the optical image stabilization motor 22 and the autofocus motor 23. The Mylar sheet 28 can be set as copper foil to play a heat dissipation role, which is beneficial to improving the heat dissipation efficiency of the optical image stabilization motor 22 and the autofocus motor 23.

[0105] Figure 15The corresponding drop reliability compression ratio distribution diagram when the reinforcement structure is set by injection molding process is provided for related technologies. Figure 16 This is a drop reliability compression ratio distribution diagram corresponding to the three-layer reinforcement structure provided in one embodiment of the present application, wherein the horizontal axis represents the compression ratio (Compression Ratio, referred to as CR), the vertical axis represents the number, and the bar graph represents the number of camera modules distributed at different compression ratios when the camera module is subjected to a drop test. The curve is a fitting of the bar graph. Figure 15 and Figure 16 As can be seen, the motor with a three-layer reinforcement structure provided by the embodiment of the present application has a compression ratio mainly distributed in the range of 25.5-37.5, while the compression ratio of the solution using injection molding reinforcement provided in the related art is mainly distributed in the range of 13.5-22.5. Therefore, the motor with a three-layer reinforcement structure provided by the embodiment of the present application can effectively increase the compression ratio, thereby improving the anti-shake effect of the optical image stabilization motor 22.

[0106] An embodiment of the present application provides a camera module. On the one hand, the aperture of the lens can be reduced by moving the aperture of the lens forward to reduce the size of the lens and the reflective prism, that is, the stacking height of the module can be reduced from the perspective of structural design; on the other hand, a sunken step structure can be provided around the camera module, and the sunken step structure is used to cooperate with the back cover and can be stacked with other structural parts, that is, the stacking height of the module can be reduced from the perspective of stacking cooperation; on the other hand, a three-layer reinforcement structure of a reinforcement plate, a reinforcement glue and a Mylar sheet is provided at the bottom of the optical image stabilization motor, so that the stacking thickness of the reinforcement structure at the bottom of the optical image stabilization motor can be reduced, that is, the stacking height of the module can be reduced from the perspective of process processing, thereby providing a compact periscope camera module, which can reduce the stacking height of the entire electronic device and is conducive to the thin design of the electronic device.

[0107] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the embodiments of the present application, rather than to limit them. Although the embodiments of the present application have been described in detail with reference to the above embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the above embodiments, or replace some or all of the technical features therein with equivalents. These modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A camera module for installation in an electronic device, characterized in that: The camera module includes: a bracket, an optical image stabilization motor, an autofocus motor, a reflective prism, a lens and a lens mount; The reflective prism is arranged in the optical image stabilization motor, the lens is arranged in the autofocus motor, the lens is connected to the lens holder, the optical image stabilization motor, the autofocus motor and the lens holder are arranged in the bracket and arranged in sequence in a first direction, the first direction is the optical axis direction of the lens, and the plane where the lens holder is located is arranged perpendicular to the optical axis direction; The lens includes a plurality of lenses arranged in sequence from the light input side to the light output side, the side of the lens facing the reflective prism is the light input side, the lens closest to the light input side among the plurality of lenses is the first lens, and the aperture of the lens is arranged on the peripheral side of the first lens or on the side of the first lens facing the reflective prism; the aperture of the aperture is equal to the aperture of the first lens.

2. The camera module according to claim 1, wherein: The lens comprises a lens barrel and a plurality of lenses arranged in the lens barrel, the aperture entity is a limiting surface of the inner wall of the lens barrel, and the limiting surface is arranged on the peripheral side of the first lens.

3. The camera module according to any one of claims 1 to 2, characterized in that: The light incident surface side of the camera module includes a main body area and a sinking area. The sinking area is arranged around the main body area, and the height of the sinking area is smaller than the height of the main body area.

4. The camera module according to claim 3, wherein: The camera module also includes a structural component, which is installed on the sunken area. The structural component includes a sealing component or an antenna bracket.

5. The camera module according to claim 3, wherein: The optical image stabilization motor, the autofocus motor, and the lens mount are respectively provided with a first sinking area, a second sinking area, and a third sinking area.

6. The camera module according to any one of claims 3 to 5, characterized in that: The edge of the bracket is flush with the surface where the sunken area is located.

7. The camera module according to any one of claims 3 to 5, characterized in that: The height difference between the sinking area and the main body area is 1mm-2mm.

8. The camera module according to any one of claims 1 to 7, wherein: The camera module also includes a reinforcing plate, a first reinforcing glue, a second reinforcing glue and a Mylar sheet. The circumference of the reinforcing plate is bonded to the bottom of the optical image stabilization motor through the first reinforcing glue, and the Mylar sheet is attached to the reinforcing plate through the second reinforcing glue.

9. The camera module according to claim 8, wherein: The Mylar sheet is copper foil.

10. The camera module according to claim 8, wherein: The sum of the thicknesses of the second reinforcing adhesive and the Mylar sheet is less than or equal to 0.1 mm.

11. The camera module according to any one of claims 1 to 10, characterized in that: The camera module also includes a substrate, and the optical image stabilization motor, the autofocus motor, and the lens mount are respectively connected to the substrate. The substrate is arranged in the bracket, and the plane where the substrate is located is perpendicular to the plane where the lens mount is located.

12. An electronic device, characterized in that: It comprises a back cover and the camera module according to any one of claims 1 to 11, wherein the back cover is provided with a camera installation area, and the camera module is installed in the camera installation area.

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