WO2022028248A1

WO2022028248A1 - Camera module and terminal device

Info

Publication number: WO2022028248A1
Application number: PCT/CN2021/107584
Authority: WO
Inventors: 戎琦; 袁栋立; 陈钧; 尹跃广; 王宇翔; 沈倩倩
Original assignee: 宁波舜宇光电信息有限公司
Priority date: 2020-08-04
Filing date: 2021-07-21
Publication date: 2022-02-10
Also published as: CN114070966B; CN114070966A; CN116194816A

Abstract

Disclosed in the present application are a camera module and a terminal device. The camera module comprises a photosensitive assembly and a lens assembly. The lens assembly comprises a first lens module, an adjustable lens module, a second lens module and a lens barrel, wherein the first lens module is mounted on the upper end face of the lens barrel, the adjustable lens module and the second lens module are mounted in the lens barrel, and the lens barrel is arranged on the photosensitive assembly; thus, the first lens module, the adjustable lens module and the second lens module are sequentially kept on a photosensitive path of the photosensitive assembly in the light entrance direction. The lens assembly further comprises a conductive part arranged on the lens barrel, the conductive part is used for conductively connecting the adjustable lens module with the photosensitive assembly, and the adjustable lens module is suitable for changing optical characteristics according to electric signals of the photosensitive assembly, thus enabling the camera module to achieve focusing.

Description

Camera module and terminal equipment

technical field

The present application relates to the technical field of electronic devices, and in particular, to a camera module and a terminal device.

Background technique

With the popularization of mobile terminal equipment, the related technology of the camera module applied to the mobile terminal equipment has been developed rapidly. In the field of consumer electronics, such as the field of smartphones, the front camera module is an indispensable component. The front camera module and the display screen of the terminal device are arranged on the same side to meet the needs of consumers such as taking selfies. Since the concept of full screen was proposed, consumers' pursuit of screen-to-body ratio has become a trend. However, the increasing "screen ratio" puts forward higher and higher requirements on the structure and arrangement of the front camera module. In order to reduce the impact of the front camera module on the screen ratio, common solutions are as follows.

The first solution is to hide the front camera module in the casing and expose the camera module when it is to be used. For example, when a telescopic camera module is used, when the camera function is required, the front camera module can be extended out of the terminal device for shooting. After the shooting is completed, the camera module can be retracted into the shell of the terminal device. However, the camera module In the process of continuous expansion and contraction, it is easy to be damaged by external impact, and the maintenance and replacement of the telescopic front camera module is relatively difficult. For another example, the display screen and the housing part of the terminal device can be slidably assembled, and the front camera module is installed on the housing part. When the camera function needs to be used, the camera module is exposed by moving the display screen or the housing part, thereby exposing the camera module. Shooting can be performed. When no shooting is required, the display screen or the housing part is moved to the original position and the camera module is hidden. This solution requires the continuous movement of the display screen or the housing part, and the display screen becomes a vulnerable part. , when the front camera module is used, the display screen and the casing are partially dislocated, which is not conducive to the installation and fixation of the terminal equipment.

The second solution is to open a through hole on the display screen of the terminal device. Some manufacturers choose to open a U-shaped hole at the top of the display screen of the terminal device, and place the front camera module, earpiece and other sensing devices in the U-shaped hole. The front camera module is the largest in the front sensor. Generally, a larger U-shaped hole is required, which has a greater impact on the screen ratio. In order to reduce the impact of the opening on the screen ratio, some manufacturers changed the U-shaped hole into a water drop shape. However, due to the structure of the front camera module itself and the limitations of the screen opening process, the opening cannot be made smaller.

There are also some manufacturers who propose a technical solution of "perforated screen", which usually cooperates with the camera module under the screen to achieve the purpose of increasing the screen ratio. "Perforated screen" refers to the removal of part of the structure in the display screen to form a light window through which visible light can pass. screen ratio. In the "perforated screen" solution, the package structure is more compact and safe, the camera module and display screen will not become vulnerable parts, and compared with structures such as U-shaped holes or water drop holes, the size of the openings is smaller and more beautiful.

Even if the "perforated screen" structure is adopted, the size of the opening is at least 4.5mm, which is difficult to meet the needs of consumers to reduce the opening of the "perforated screen" as much as possible to maximize the screen ratio. . In addition, in order to meet the requirement that the aperture screen is designed as a small hole, the camera module needs to make some structural and optical design improvements. These improvements will lead to the weakening of other functions of the camera module, such as the anti-stray light function of the camera module. .

In addition, most mobile phone camera modules use a voice coil motor to achieve focusing, but the disadvantage of using a voice coil motor to achieve automatic focusing is that the camera module is large in size, complex in structure, and complicated in processing technology. Magnetic interference is generated, and heat dissipation issues also need to be considered. Therefore, how to reduce the opening of the "perforated screen" as much as possible, so that the front camera module is not affected by stray light, magnetic field, gravity, etc., to achieve automatic focusing and improve imaging quality, is an urgent problem to be solved in today's market. problem.

SUMMARY OF THE INVENTION

An object of the present application is to provide a small-sized adjustable focus camera module.

In order to achieve the above purpose, the present application provides a camera module, including a photosensitive assembly and a lens assembly, the lens assembly includes a first lens module, an adjustable lens module, a second lens module and a lens barrel, the first lens module. Installed on the upper end surface of the lens barrel, the adjustable lens module and the second lens module are installed in the lens barrel, and the lens barrel is arranged on the photosensitive component, so that the first lens module , The adjustable lens module and the second lens module are sequentially maintained on the light-sensing path of the light-sensing component along the light-incoming direction, and the lens component also includes a conductive portion provided on the lens barrel, the conductive portion The adjustable lens module is conductively connected with the photosensitive component, and the adjustable lens module is adapted to change its optical characteristics according to the electrical signal of the photosensitive component, so as to realize the focus adjustment of the camera module.

Further, the inner wall of the lens barrel has a mounting platform for mounting the adjustable lens, the adjustable lens module is arranged on the upper end surface of the mounting platform, and the upper end surface of the adjustable lens module is suitable for Deformation occurs when the electrical signal changes to achieve focusing, there is a gap between the upper end surface of the adjustable lens module and the lower end surface of the first lens module, the side surface of the adjustable lens module and the inner wall of the lens barrel There are gaps in between.

Further, the conductive portion includes two conductive parts separated from each other, the outer surface of the lens barrel has two laser grooves, and the two conductive parts are respectively disposed in the two laser grooves by a laser direct molding process.

Further, the upper end surface of the lens barrel has two pad grooves, the pad grooves have openings toward the side of the adjustable lens module, and the lens barrel further includes pads arranged in the pad grooves , each of the laser grooves is communicated with one of the pad grooves, so that the conductive member in the laser groove is conductively connected with the pads in the pad groove, and the adjustable lens module is The positive electrode connection end and the negative electrode connection end are respectively conductively connected to the corresponding pads in the pad grooves through electrical connection lines.

Further, the conductive part includes two conductive parts separated from each other, the conductive parts are disposed in the side wall of the lens barrel by an in-mold injection process, and both ends of the conductive parts are exposed outside the lens barrel.

Further, the upper end surface of the lens barrel is provided with a plurality of glue dispensing grooves, the glue dispensing grooves extend downward from the upper end surface of the lens barrel, and the side of the glue dispensing groove facing the adjustable lens module has The bottom surface of the glue dispensing groove is higher or lower than the upper end surface of the mounting table.

Further, the outer frame of the adjustable lens module is rectangular, and the upper end surface of the lens barrel is provided with four glue dispensing grooves, each of the glue dispensing grooves and a side wall of the adjustable lens module. Oppositely, the glue dispensing slot deviates from the center line of the side wall of the adjustable lens module opposite to it, wherein the bottom surface of one glue dispensing slot is higher than the upper end surface of the mounting table, and the other three glue dispensing slot The bottom surface is lower than the upper end surface of the mounting table.

Further, the outer frame of the adjustable lens module is rectangular, and the upper end surface of the lens barrel is provided with four glue dispensing grooves, each of the glue dispensing grooves and one of the adjustable lens modules. The vertices are opposite to each other, the bottom surface of one of the glue dispensing grooves is higher than the upper end surface of the installation table, and the bottom surfaces of the other three glue dispensing grooves are lower than the upper end surface of the installation table.

Further, the first lens module includes a first lens, the first lens has a first surface on the object side and a second surface on the image side, and a central area of the first surface is formed to protrude toward the object side a protruding part, the first surface further has a structure area surrounding the protruding part, the top surface of the protruding part forms an optically effective area for imaging, and the sidewall of the protruding part connects the optically effective area and the the structural area.

Further, the first lens is made of glass, the diameter of the protruding portion is not more than 1 mm to 2.5 mm, the height of the protruding portion is not less than 0.3 mm to 1.2 mm, and the side wall of the protruding portion is not less than 0.3 mm to 1.2 mm. The included angle of the optical axis of a lens is less than 15°.

Further, the first lens module further includes a light absorbing member disposed around the sidewall of the protruding portion, and a top end of the light absorbing member extends to a height not lower than the sidewall of the protruding portion.

Further, the light absorbing member is disposed close to the side wall of the protruding portion, and the light absorbing member has a first side surface close to the side wall of the protruding portion, a second side surface far away from the side wall of the protruding portion, and a connection On the third surfaces of the top end of the first side surface and the top end of the second side surface, the height of the top end of the first side surface is lower than the height of the top end of the second side surface, and at least a section of the third surface is an inclined surface.

Further, the top ends of the first side surface and the second side surface both extend to a height not lower than the side wall of the protruding portion, and the third surface is roughened and/or plated on the third surface. With anti-reflection light absorbing layer.

Further, the first lens is connected to the upper end surface of the lens barrel through an adhesive, and after the adhesive is cured, the first lens is kept on the lens barrel, and the first lens module is connected to the lens barrel. The relative position of the lens barrels is determined by an active calibration step.

Further, the photosensitive component includes a circuit board, a photosensitive chip, a filter element and a lens base, the photosensitive chip is arranged on the circuit board and is electrically connected to the circuit board, and the lens base is arranged on the circuit board. On the board, the lens assembly is held above the photosensitive chip by the lens base, the filter element is held between the lens assembly and the photosensitive chip by the lens base, and the lens barrel is It is arranged on the upper end surface of the lens base, and the photosensitive component further includes a lens base conductive part arranged on the lens base, and the lens base conductive part electrically connects the conductive part and the circuit board.

Further, the conductive part includes two conductive parts separated from each other, the outer surface of the lens barrel has two laser grooves, the two conductive parts are respectively arranged in the two laser grooves by a laser direct molding process, and the mirror base is The conductive part includes two mirror base conductive parts separated from each other, the outer surface of the lens base has two mirror base laser grooves, and the two mirror base conductive parts are respectively arranged in the two mirror base laser grooves by a laser direct molding process, The first ends of the two mirror base conductive parts are respectively conductively connected to the second ends of the two conductive parts, the second ends of the two mirror base conductive parts are respectively conductively connected to the circuit board, and the two conductive parts The first ends of the lens are respectively conductively connected with the adjustable lens module.

Further, the adjustable lens module includes a piezoelectric film, a diaphragm, a flexible transparent film, a lens main body and a glass base layer arranged in sequence along the light entering direction, and the adjustable lens module also includes a peripheral side of the lens main body. The elastic substrate, the elastic semi-flexible transparent film, the diaphragm and the edge of the piezoelectric film are supported by the elastic substrate, and the piezoelectric film has a light-transmitting area in the middle to allow light to pass through, the diaphragm For limiting the imaging range, the glass base layer is used to support the lens body, the piezoelectric film is suitable for generating deformation when an electric current is applied, and the piezoelectric film is suitable for pressing the flexible transparent film when deformed. The lens body is formed so that the upper end surface of the lens body forms a spherical surface, so as to realize focusing.

The present application also provides a terminal device, including the camera module.

Further, the terminal device includes a display screen with an opening, and the protruding portion of the camera module is embedded in the opening.

Other technical features and beneficial effects of the present application will be further described in the following detailed description.

Description of drawings

1 is a schematic diagram of an embodiment of a camera module of the application;

2 is a schematic diagram of another embodiment of the camera module of the application;

3 is a schematic diagram of an embodiment of the lens barrel of the camera module of the application;

4 is a schematic diagram of an embodiment of a Tlens lens;

5 is a partial schematic diagram of an embodiment of the camera module of the present application;

6 is a schematic diagram of an embodiment of the lens barrel of the camera module of the application;

7 is a schematic diagram of another embodiment of the lens barrel of the camera module of the application;

FIG. 8 is a top view of an embodiment of the camera module of the application, and the first lens module is not shown in the figure;

9 is a top view of another embodiment of the camera module of the application, and the first lens module is not shown in the figure;

10 is a schematic diagram of an embodiment of the lens barrel of the camera module of the application;

11 is a partial enlarged view of an embodiment of the lens barrel of the camera module of the application;

FIG. 12 is a schematic diagram of an embodiment of the first lens of the application;

13 is a schematic diagram of an embodiment of the first lens of the application, showing that it is embedded in the opening of the display screen;

14 is a schematic diagram of another embodiment of the first lens of the application;

15 is a schematic diagram of an embodiment of the first lens of the application, showing that it is embedded in the opening of the display screen;

16 is a schematic diagram of an embodiment of the first lens module of the camera module of the application;

17 is a schematic diagram of an embodiment of a light-absorbing member of a camera module of the present application;

18 is a schematic diagram of the x-axis, y-axis, z-axis, u-axis, v-axis, and w-axis in the active calibration step;

FIG. 19 is a schematic diagram of an embodiment of a terminal device of the present application.

In the picture:

1. The first lens module; 100, the first lens; 111, the protrusion; 1111, the top surface; 1112, the side wall; 112, the structural area; 120, the light absorbing member; 123. The third surface;

2. Adjustable lens module; 2A, Tlens lens; 21, glass base layer; 22, lens body; 23, flexible transparent film; 24, piezoelectric film; 25, diaphragm; 26, elastic base;

3. The second lens module; 31. The second lens;

4, lens barrel; 41, mounting table; 42, laser slot; 43, pad slot; 44, pad; 45A/45B, dispensing slot; 40, through hole;

5. Conductive part; 51. Conductive part;

6. Photosensitive component; 61. Circuit board; 62. Photosensitive chip; 63. Lens base; 64. Filter element; 65. Conductive part of mirror base;

7. Display screen; 71. Opening;

8. Cover plate.

detailed description

Below, the present application is further described in conjunction with the specific embodiments. It should be noted that, under the premise of no conflict, the embodiments described below or between the technical features can be arbitrarily combined to form new embodiments.

In the description of this application, it should be noted that, for orientation words, such as the terms "center", "horizontal", "longitudinal", "length", "width", "thickness", "height", "upper" , "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise" , "counterclockwise" and other indications of orientation and positional relationship are based on the orientation or positional relationship shown in the drawings, only for the convenience of describing the application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation , is constructed and operated in a specific orientation, and should not be construed as limiting the specific protection scope of the present application.

It should be noted that the terms "first", "second" and the like in the description and claims of the present application are used to distinguish similar objects, and are not necessarily used to describe a specific sequence or sequence.

The terms "comprising" and "having" and any variations thereof in the description and claims of this application are intended to cover non-exclusive inclusion, eg, a process, method, system, product or product comprising a series of steps or units. The apparatus is not necessarily limited to those steps or units expressly listed, but may include other steps or units not expressly listed or inherent to the process, method, product or apparatus.

The present application provides a camera module, which is suitable for use as an under-screen camera module, and is especially suitable for a display screen with small holes. The module can obtain sufficient external light to meet the light input requirements.

As shown in FIG. 1 , the camera module of the present application includes a photosensitive assembly 6 and a lens assembly disposed on the photosensitive assembly 6 . The lens assembly includes a first lens module 1 , an adjustable lens module 2 , a second lens module 3 and a lens barrel 4. The first lens module 1 is installed on the upper end face of the lens barrel 4, the adjustable lens module 2 and the second lens module 3 are installed in the lens barrel 4, and the lens barrel 4 is arranged on the photosensitive assembly 6, so that the first lens module 1 , the adjustable lens module 2 and the second lens module 3 are sequentially maintained in the photosensitive path of the photosensitive component 6 along the light entering direction. The lens assembly also includes a conductive portion 5 disposed on the lens barrel 4, and the conductive portion 5 electrically connects the adjustable lens module 2 with the photosensitive assembly 6, and the adjustable lens module 2 is adapted to change its optical characteristics according to the signal of the photosensitive assembly 6, thereby The focus adjustment of the camera module is realized.

The camera module sets the adjustable lens module 2 in the lens barrel 4, which can prevent the adjustable lens module 2 from being damaged. The structure of the adjustable lens module 2 is more complicated than that of the ordinary lens, and its structure is more sensitive without the protection of the outer frame, and there are usually structures around it for conductive connection (such as gold wires, solder pins, etc.), these If the structure is directly exposed to the outside of the lens barrel, it will be easily damaged, which will affect the normal use of the adjustable lens module 2. Setting the adjustable lens module 2 in the lens barrel 4 can realize the adjustment of the adjustable lens without adding other components. The protection of the lens module 2 improves the service life of the adjustable lens module 2 .

The camera module sets the first lens module 1 on the upper end face of the lens barrel 4 to reduce the size of the camera module and increase the amount of incoming light. The design that the first lens module 1 is arranged on the upper end face of the lens barrel 4 allows the optically effective area of the first lens module 1 to be directly embedded into the light inlet hole of the terminal device, thereby reducing the space occupied by the camera module, and at the same time reducing the cost of the camera module. It is beneficial to increase the light input of the camera module. If the first lens module 1, the adjustable lens module 2 and the second lens module 3 are all arranged in the lens barrel, the size and weight of the lens barrel are bound to increase, and the upper end surface of the lens barrel 4 is used to support the first lens module 1, A part of the lens barrel surrounding the first lens module 1 can be omitted, which is beneficial to the reduction of the size and weight of the lens barrel. The lens of the first lens module 1 may be a lens of plastic material or glass material, which is not easy to be damaged, and its arrangement outside the lens barrel 4 will basically not affect the normal use of the first lens module 1 .

It can be understood that the middle of the lens barrel 4 has a through hole 40 penetrating the upper and lower end faces, the adjustable lens module 2 and the second lens module 3 are arranged in the through hole 40 , and the adjustable lens module 2 is located at the object of the second lens module 3 . side. In some embodiments, the second lens module 3 includes a plurality of second mirrors 31 , and each of the second mirrors 31 is sequentially disposed in the through hole 40 of the lens barrel 4 .

The conductive portion 5 may be disposed on the lens barrel 4 by an in-mold injection process or a laser direct molding process. It can be understood that the conductive part 5 includes two conductive members 51 separated from each other, and the two conductive members 51 are respectively used to realize the conductive connection of the positive electrode and the negative electrode.

The photosensitive assembly 6 includes a circuit board 61 , a photosensitive chip 62 , a lens base 63 , and a filter element 64 . The photosensitive chip 62 is arranged on the circuit board 61 and is electrically connected to the circuit board 61. The lens base 63 is arranged on the circuit board 61. The lens assembly is held above the photosensitive chip 62 by the lens base 63, and the filter element 64 passes through the lens base. The lens 63 is held between the lens assembly and the photosensitive chip 62 , and the lens barrel 4 is arranged on the upper end surface of the lens base 63 . As shown in FIG. 1 , the photosensitive assembly 6 further includes a lens seat conductive portion 65 disposed on the lens base 63 , and the lens seat conductive portion 65 electrically connects the conductive portion 5 and the circuit board 61 . The mirror base conductive portion 65 includes two mirror base conductive members 651 separated from each other, and the two mirror base conductive members 651 are respectively used to realize the conductive connection of the positive electrode and the negative electrode. The first end of each mirror base conductive member 651 is conductively connected to a conductive member 51 , and the second end of each mirror base conductive member 651 is conductively connected to the circuit board 61 .

In some embodiments, the conductive part 5 is formed on the lens barrel 4 by an in-mold injection process. The in-mold injection process is that when the lens barrel 4 is formed, the conductive parts 51 are pre-installed in the injection mold, and then raw materials are injected into the mold. After cooling and demolding, the conductive member 51 is disposed inside the lens barrel 4 , as shown in FIG. 2 . The in-mold injection molding process belongs to the prior art, and the specific implementation of the in-mold injection molding process will not be repeated in this application. The cost of arranging the conductive member 51 by using the in-mold injection molding process is relatively low, and the conductive member 51 is not easily damaged or affected by the external environment except that the connection points at both ends are exposed, and other parts are wrapped inside the plastic member. Influence. The exposed ends of the conductive member 51 are respectively close to the mirror base conductive member 651 and the adjustable lens module 2 to facilitate the conductive connection between the conductive member 51 and the mirror base conductive member 651 and the adjustable lens module 2 . As shown in FIG. 2 , the first end of the conductive member 51 extends into a pad groove on the upper end face of the lens barrel 4 and is conductively connected to the pad in the pad groove. The adjustable lens module 2 is connected to the pad. Conductive connection, so as to realize the conductive connection between the conductive member 51 and the adjustable lens module 2 .

Similarly, the conductive part 65 of the lens holder can also be formed on the lens base 63 by the in-mold injection process. As shown in FIG. The bottom of the lens mount 63 is exposed. The lens barrel 4 is arranged on the upper end face of the lens base 63, the first end of the lens base conductive member 651 and the conductive member 51 can be electrically connected by conductive silver glue, and the second end of the lens base conductive member 651 is connected to the circuit board 61. Conductive connection can also be achieved through conductive silver glue.

In other embodiments, the conductive portion 5 is formed on the sidewall of the lens barrel 4 by a laser direct molding process. As shown in FIG. 3 , the outer surface of the lens barrel 4 has two laser grooves 42 , and only one laser groove 42 is shown in FIG. 3 . The two conductive members 51 are respectively disposed in the two laser grooves 42 through a laser direct molding process. The conductive members 51 are not shown in FIG. 3 . Using the laser direct molding process to set the conductive member 51 is beneficial to reduce the overall size of the lens assembly, and can also prevent other metals in the camera module from affecting the conductive member 51 . Preferably, the depth of the laser groove 42 is not more than 20 μm˜30 μm, and the width is not less than 60 μm. Preferably, one end of the laser groove 42 extends from the outer surface of the lens barrel 4 to the upper end surface, and extends all the way to the edge of the through hole 40 located on the upper end surface of the lens barrel 4, so as to facilitate the adjustment with the adjustable through hole 40. The lens module 2 is electrically connected, and the other end of the laser groove 42 extends downward to the lower end of the lens barrel 4 . The first end of the conductive member 51 and the adjustable lens module 2 can be conductively connected through a structure such as a gold wire. The photosensitive assembly 6 is electrically connected to the adjustable lens module 2 . Preferably, two ends of the conductive member 51 in one of the laser grooves 42 are respectively conductively connected to the positive terminal of the photosensitive component 6 and the adjustable lens module 2, and both ends of the conductive member 51 in the other laser groove 42 are respectively connected to the photosensitive member 6 and the positive terminal of the adjustable lens module 2. The component 6 is electrically connected to the negative terminal of the adjustable lens module 2 .

Similarly, the conductive portion 65 of the lens base can also be formed on the lens base 63 by a laser direct molding process. The outer surface of the lens base 63 has two laser grooves for the lens bases, and the conductive members 651 for the two lens bases are respectively disposed in the two lens bases laser grooves through a laser direct molding process. The first end of the lens holder conductive member 651 extends to the upper end surface of the lens base 63 , and the second end extends to the lower end of the lens base 63 . The lens barrel 4 is disposed on the upper end surface of the lens base 63 , and an adhesive is provided between the lower end surface of the lens barrel 4 and the upper end surface of the lens base 63 , so that the lens barrel 4 and the lens base 63 are connected by the adhesive. At the same time, in order to realize the conductive connection between the conductive member 51 and the mirror base conductive member 651, the lower ends of the two laser grooves 42 of the lens barrel 4 are respectively close to the upper ends of the two mirror base laser grooves of the lens base 63. Conductive silver glue is arranged between the laser grooves, so that the second end of the conductive member 51 is conductively connected to the first end of the mirror base conductive member 651 . The lower end of the laser groove of the mirror base is close to the electrode connection end of the circuit board 61, and conductive silver glue is arranged between the lower end of the laser groove of the mirror base and the electrode connection end of the circuit board 61, so that the second end of the mirror base conductive member 651 is connected to the circuit board. 61 conductive connections. It can be understood that the conductive silver paste can also be replaced by other conductive materials, which is not limited in this application.

When the conductive member 51 or the lens base conductive member 651 is provided by the in-mold injection process, the conductive connection end can be set on the inner side of the lens barrel 4 or the lens base 63 to facilitate the connection with the components inside the lens barrel 4 or the lens base 63 . Conductive connection, and when the in-mold injection molding process is used, the circuit is set inside the injection molding material, which is not easily affected by the external environment, and the stability is relatively better. Using laser direct molding, the conductive connection end of the conductive member 51 or the lens base conductive member 651 is not easy to set on the inner side of the lens barrel 4 or the lens base 63, but the laser direct molding process can more easily modify the circuit layout to meet the actual needs. .

Of course, the conductive connection between the conductive member 51 and the mirror base conductive member 651 , and the conductive connection between the mirror base conductive member 651 and the circuit board 61 can also be achieved by welding instead of the conductive silver glue. Specifically, the lower end surface of the lens barrel 4 is provided with a lens barrel welding pin (not shown in the figure), the lens barrel welding pin is conductively connected with the conductive member 51, and the upper end surface of the lens base 63 is provided with a lens seat pad (Fig. (not shown in the figure), the lens seat pad is conductively connected with the lens seat conductive member 651, and after the lens barrel 4 is installed on the lens base 63, the lens barrel welding pin is conductively connected with the lens seat pad; the lower end face of the lens base 63 The mirror base welding pins (not shown in the figure) are provided, and the mirror base welding pins are conductively connected to the mirror base conductive member 651. The upper end surface of the circuit board 61 is provided with a circuit board pad (not shown in the figure), and the lens After the base 63 is installed on the circuit board 61, the welding pins of the mirror base are conductively connected to the pads of the circuit board. The material of the lens barrel welding pins and the lens seat welding pins can be leaded solder or lead-free low-temperature molten solder. The material of the disc is the same. After welding the lens barrel welding pins and the lens seat pads, and the lens seat welding pins and the circuit board pads, both conductive connection and fixed connection are realized, which is beneficial to improve the structural stability of the camera module.

There are various embodiments of the adjustable lens module 2, such as a liquid lens, a liquid crystal lens, a Tlens (Tuneable lens) lens, and the like. Those skilled in the art can understand that the principle of the liquid lens is that a closed capsule is filled with liquid substances, and the capsule is squeezed by the driving device to deform the liquid lens, thereby changing the optical characteristics of the liquid lens and realizing focusing; The principle of the liquid crystal lens is to use the liquid crystal molecules in the liquid crystal lens to generate different deflection angles under the control of different intensity voltages, so that lenses with different focal lengths can be simulated to realize the focusing of the camera module; the principle of the Tlens lens is to use Piezoelectric actuators change the shape of the lens body made of polymer, thereby changing the optical properties of the Tlens lens, enabling focus adjustment.

In some embodiments, the adjustable lens module 2 realizes the focusing function by generating deformation. In these embodiments, a certain gap needs to be reserved around the adjustable lens module 2 to prevent the adjustable lens module 2 from being squeezed with surrounding components when deformed, thereby affecting its deformation effect or causing damage to surrounding components . In other words, there needs to be a gap between the deformed surface of the adjustable lens module 2 and the surrounding components. It can be understood that the adjustable lens module 2 can be deformed only upwards or downwards, or can be deformed upwards and downwards simultaneously. Of course, when the adjustable lens module 2 is deformed upwards or downwards, its side surface will Deformation occurs accordingly, that is, the side surface is also a deformation surface, so the side surface of the adjustable lens module 2 also needs to set a gap between the side surface of the adjustable lens module 2 and the inner wall of the lens barrel 4 .

In some preferred embodiments, the adjustable lens module 2 is a Tlens lens, which deforms when the current or voltage it receives changes, so that the optical properties are changed. FIG. 4 provides an embodiment of the Tlens lens 2A, and it can be understood that this does not limit the Tlens lens of the present application to have the structure described in this embodiment and the accompanying drawings. As shown in FIG. 4 , the Tlens lens 2A includes a piezoelectric film 24 , a diaphragm 25 , a flexible transparent film 23 , a lens body 22 and a glass base layer 21 arranged in sequence along the light-incident direction. The Tlens lens 2A also includes a surrounding of the lens body 22 . The elastic base 26 on the side, the elastic semi-flexible transparent film 23 , the diaphragm 25 and the edge of the piezoelectric film 24 are supported by the elastic base 26 . The piezoelectric film 24 may be ring-shaped so as to form a light-transmitting area in the middle thereof to allow light to pass therethrough. The diaphragm 25 is used to limit the imaging range. The glass base layer 21 is used to support the lens body 22 . The elastic substrate 26 is a silicon semiconductor substrate, which is suitable for elastic deformation when being squeezed, and also functions as a semiconductor substrate. The lens body 22 is made of a transparent, deformable, and non-fluid polymer that is adapted to deform when squeezed so that the optical properties of the lens body 22 change. The flexible transparent film 23 covers the upper end surface of the lens body 22. The flexible transparent film 23 is suitable for deformation when being squeezed, and squeezes the lens body 22 when it is deformed, thereby deforming the lens body 22 to change its optical properties. The piezoelectric film 24 is conductively connected with the photosensitive component 6, and the piezoelectric film 24 is suitable for deforming when a current is applied, so as to squeeze the flexible transparent film 23 and the lens body 22, so that the upper end surface of the lens body 22 forms a spherical surface, so as to realize focusing.

Using Tlens lens instead of traditional voice coil motor to realize automatic focusing of lens assembly is beneficial to reduce the size of lens assembly, simplify the structure of lens assembly, and meet the requirements of terminal equipment for small volume of front camera module. In addition, the Tlens lens has low energy consumption, fast response, and is not disturbed by magnetic fields and gravitational fields, and has better stability in use.

The inner wall of the lens barrel 4 has a mounting table 41 for mounting the adjustable lens module 2 , and the adjustable lens module 2 is arranged on the upper end surface of the mounting table 41 . The adjustable lens module 2 is suitable for upward deformation, that is, when the adjustable lens module 2 is focusing, the upper end face and the side face are deformed, and the lower end face is not deformed. Based on this, the upper end face of the adjustable lens module 2 and the There is a gap between the lower end surfaces of the first lens module 1 to allow the adjustable lens module 2 to deform in the direction of the first lens module 1 , and there is also a gap between the side surface of the adjustable lens module 2 and the inner wall of the lens barrel 4 . In a specific embodiment, the adjustable lens module 2 is a Tlens lens 2A, the minimum distance of the gap between the upper end surface of the Tlens lens 2A and the lower end surface of the first lens module 1 is 0.16 mm, and the side surface of the Tlens lens 2A and the mirror The minimum distance of the gap between the inner walls of the barrel 4 is 0.2 mm.

The adjustable lens module 2 can be bonded on the mounting table 41 by glue. The current conventional operation method is as follows: a plurality of glue dispensing grooves 45A are arranged on the upper end face of the lens barrel 4. As shown in FIG. 6, the glue dispensing grooves 45A are downward Extending to the mounting table 41, after the adjustable lens module 2 is placed on the mounting table 41, the glue reaches the outside of the adjustable lens module 2 through the glue dispensing groove 45A. After the glue is cured, the adjustable lens module 2 is stably kept in the lens barrel. 4 within. However, in actual operation, the applicant found that when using the glue dispensing tank 45A shown in FIG.

In order to solve this problem, the applicant proposes an improved solution, as shown in FIG. 7 : the upper end face of the lens barrel 4 has a plurality of glue dispensing grooves 45B, and the center of the lens barrel 4 has through holes 40 penetrating the upper and lower ends. The glue slot 45B is disposed close to the edge of the through hole 40, so that the glue slot 45B has an opening on the side facing the through hole 40, that is, the glue slot 45B has an opening on the side facing the adjustable lens module 2, and the bottom surface of the glue slot 45B has an opening. higher or lower than the upper end face of the mounting table 41 . When the bottom surface of the glue dispensing groove 45B is higher than the upper end surface of the mounting table 41, it is difficult for the glue to reach the bottom of the adjustable lens module 2, that is, the glue can be prevented from overflowing to the bottom surface of the adjustable lens module 2; the bottom surface of the glue dispensing groove 45B is low On the upper end surface of the mounting table 41 , the glue mainly gathers at the bottom of the glue dispensing tank 45B, and it is difficult to overflow to the bottom surface of the adjustable lens module 2 .

In some embodiments, the outer frame of the adjustable lens module 2 is rectangular, and the adjustable lens module 2 is relatively sensitive in the dotted area A shown in FIG. 8 . In order to prevent the glue B from entering the area A and affecting the adjustable lens module 2, The dispensing tank 45B is preferably disposed outside the sensitive area A. The dispensing groove 45B is far away from the optically effective area in the center of the adjustable lens module 2 , which is beneficial to reduce the influence of dispensing on the optically effective area, and also helps to reduce the influence of stress.

In a specific embodiment, as shown in FIG. 8 , four glue dispensing grooves 45B are arranged on the upper end face of the lens barrel 4 , each glue dispensing groove 45B is opposite to a side wall of the adjustable lens module 2 , and the glue dispensing grooves 45B deviate from each other. The center line of the side wall of the adjustable lens module 2 opposite to it is connected with the lens barrel 4 by arranging glue in the four glue dispensing grooves 45B. In another specific embodiment, as shown in FIG. 9 , four glue dispensing grooves 45B are provided on the upper end surface of the lens barrel 4 , and each glue dispensing groove 45B is opposite to a vertex of the adjustable lens module 2 .

As shown in FIG. 8 , the distance from the dispensing groove 45B to the center of the adjustable lens module 2 is denoted as L ₂ , and the distance from the vertex of the adjustable lens module 2 to the center of the adjustable lens module 2 is denoted as L ₁ , preferably 0.8L ₁ ≤ L ₂ ≤ L ₁ .

Preferably, among the four dispensing grooves 45B, the bottom surface of one of the dispensing grooves 45B is higher than the upper end surface of the mounting table 41, and the bottom surface of the other three dispensing grooves 45B is lower than the upper end surface of the mounting table 41. First, the glue is dispensed in the dispensing groove 45B whose bottom surface is higher than the upper end surface of the mounting table 41 , and the adjustable lens module 2 is pre-positioned.

In some embodiments, as shown in FIGS. 8 and 9 , the upper end surface of the lens barrel 4 has at least two pad grooves 43 , the middle of the lens barrel 4 has through holes 40 penetrating the upper and lower ends, and the two pad grooves 43 are close to the through holes 40, so that the side of the pad slot 43 facing the light-passing hole 42 is an opening. As shown in FIG. 10, the pad slot 43 extends downward to the adjustable lens module 2, so that the adjustable lens module 2 The positive terminal and the negative terminal are respectively opposite to the side openings of the two pad grooves 43 . As shown in FIG. 11 , the lens barrel 4 further includes pads 44 disposed in the pad grooves 43 , and each laser groove 42 is communicated with a pad groove 43 , so that the conductive members 51 in the laser grooves 42 (in FIG. 11 ) The conductive member 51 (not shown) is conductively connected to the pads 44 in the pad groove 43, and the positive terminal and the negative terminal of the adjustable lens module 2 are respectively connected to the corresponding pad grooves 43 through electrical connecting wires (such as gold wires). The inner pad 44 is conductively connected, and the electrical connection wire can extend from the pad 44 to the positive or negative terminal of the adjustable lens module 2 through the side opening of the pad groove 43, so that the electrical connection wire can be prevented from passing through the mirror. the upper end of the barrel 4, thereby preventing the first lens module 1 installed on the upper end face of the lens barrel 4 from affecting the electrical connection line.

In some embodiments, the first lens module 1 includes a first lens 100, as shown in FIG. 12, the first lens 100 has a first surface on the object side and a second surface on the image side. The central area of the first surface protrudes toward the object side to form a protruding portion 111 , and the protruding portion 111 is substantially barrel-shaped. The first surface also has structured regions 112 surrounding the protrusions 111 . The top surface 1111 of the protrusion 111 forms an optically effective area for imaging, and the sidewall 1112 of the protrusion 111 connects the optically effective area and the structure area 112 formed by the top surface 1111 . The second surface includes an optically active area located in the central area and a non-optically imaging area surrounding the periphery of the optically active area.

The "optical effective area" mentioned in this application is used to refract light, and the light is suitable for reaching the photosensitive component 6 for imaging after passing through the optical effective area; the structural area 112 or the "non-optical imaging area" is used for the installation of the lens and does not participate in the light refraction.

In some embodiments, as shown in FIG. 13 , the diameter φ of the protruding portion 111 is not more than 1 mm˜2.5 mm, and the height h of the protruding portion 111 is not less than 0.3 mm˜1.2 mm.

In this application, the material of the first lens 100 may be plastic or glass. In some preferred embodiments, the first lens 100 is made of glass. The first lens 100 made of glass material has smaller temperature drift and higher light transmittance. In the case that the thickness of the first lens 100 is relatively thick, using glass material to prepare the first lens 100 can reduce the influence of the thickness on the light transmittance.

The first lens 100 made of glass can be prepared by the process of molding glass. The molding principle of the molding glass is as follows: placing the preformed glass embryo in a precision machining molding mold, raising the temperature to soften the glass, and then forming the mold core. The pressure on the surface causes the glass to be deformed by force, and the lens of the desired shape can be formed by taking out the mold. When the first lens 100 is manufactured by using molded glass, there may be a large inclination angle between the side wall 1112 of the protruding portion 111 and the optical axis of the lens after molding. The angle between the side wall 1112 and the optical axis of the lens is smaller than a certain angle. In some embodiments, as shown in FIG. 14 , the included angle α between the side wall 1112 of the protruding portion 111 and the optical axis of the lens is less than 15°.

When the camera module of the present application is assembled in the terminal device, the protruding portion 111 of the first lens 100 is embedded in the opening 71 of the display screen 7 of the terminal device, as shown in FIG. 13 . The arrangement of the protruding portion 111 reduces the distance between the camera module and the upper end of the opening 71 , which is beneficial to increase the effective field of view of the camera module, that is, reduce the field of view of the first lens module 1 The angle is affected by the aperture of the opening 71, which ensures that the camera module has sufficient light input. In addition, a part of the camera module is embedded in the display screen 7, so the volume of the camera module placed in other positions in the terminal facility is reduced, that is, the terminal device is reduced as the camera module The installation space reserved by the group meets the requirements of the terminal equipment for miniaturization of the camera module.

Of course, since the camera module directly embeds the first lens 100 in the opening 71 of the display screen 7 , the aperture of the opening 71 needs to consider the requirements of the field of view of the camera module.

When the camera module and the display screen 7 are assembled, there is inevitably an assembly eccentricity tolerance between the opening 71 and the first lens 100 . Therefore, a gap needs to be reserved between the side wall 1112 of the protruding portion 111 and the inner wall of the opening 71 . , as shown in Figure 13. In some embodiments, a cover plate 8 is provided above the display screen 7 of the terminal device. As shown in FIG. 15 , the cover plate 8 does not have holes at the positions corresponding to the openings 71 , considering that when the first lens 100 is assembled There is also a gap between the top surface 1111 of the protruding portion 111 and the cover plate 8 .

However, the gap between the protruding portion 111 and the opening 71 and the cover plate 8 may cause some stray light to be generated, thereby affecting the imaging of the camera module. For example, a part of the light will irradiate on the inner wall of the opening 71 and enter the first lens 100 after being reflected by the inner wall, thereby generating stray light and affecting the imaging quality, as shown in the optical path in FIG. 15 .

In order to further improve the imaging quality of the camera module, in some embodiments, as shown in FIG. 16 , the first lens module 1 further includes a light absorbing member 120 . The top end of 120 extends to no lower than the height of side wall 1112 . It is worth mentioning that the height of the light absorbing member 120 or the height of the side wall 1112 refers to their respective maximum heights in a direction parallel to the optical axis. The height of the light absorbing member 120 meets the requirements of the viewing angle of the camera module and does not generate stray light or the stray light is minimized. In other words, the light absorbing member 120 can function as a diaphragm, and the light absorbing member 120 can control the light entering range of the camera module. On the one hand, the light absorbing member 120 can block and absorb a part of the light that should be incident on the inner wall of the opening 71; This part of the light affects the imaging.

In other embodiments, an absorption layer may also be coated on the inner wall of the opening 71 to reduce the generation of stray light. Compared with arranging the light absorbing member 120 , the process of coating the absorbing layer in the opening 71 is more difficult and costly.

It can be understood that the light absorbing member 120 does not reflect light, and the light absorbing member 120 may be a black object.

In some preferred embodiments, the light absorbing member 120 is disposed close to the side wall 1112 of the protruding portion 111 , so that stray light can be prevented from entering between the light absorbing member 120 and the side wall 1112 of the protruding portion 111 .

In some preferred embodiments, as shown in FIG. 17 , the light absorbing member 120 has a first side 121 close to the side wall 1112 of the protrusion 111 , a second side 122 away from the side wall 1112 of the protrusion 111 , and connecting the first side 121 The top and the third surface 123 at the top of the second side 122, the height of the top of the first side 121 is lower than the height of the top of the second side 122, and at least a section of the third surface 123 is an inclined surface, that is, the outer side of the light absorbing member 120 is higher than the inner side . The lower inner side can reduce the influence of the light absorbing member 120 on the light input amount of the first lens 100, while the higher outer side can better block the light reflected from the inner wall of the opening 71, thus obtaining a larger light input amount , and also reduces the entry of stray light.

In some embodiments, the top ends of the first side surface 121 and the second side surface 122 both extend to a height not lower than the side wall 1112 of the protrusion 111 .

In some embodiments, the third surface 123 is roughened, so as to reduce the reflection of light and the generation of stray light. In some embodiments, the third surface 123 is coated with an anti-reflection light absorbing layer. In another embodiment, the third surface 123 is roughened first, and then coated with an anti-reflection and light-absorbing layer.

In some embodiments, the first lens 100 is connected to the upper end surface of the lens barrel 4 through an adhesive, and the first lens 100 is maintained on the lens barrel 4 after the adhesive is cured. It is worth mentioning that the adhesive is in contact with the non-optical imaging area of the second surface of the first lens 100 . Preferably, the relative position of the first lens 100 and each lens module in the lens barrel 4 is determined through the active calibration step. In other words, the relative position of the adjustable lens module 2 and the second lens module 3 can be positioned by the lens barrel 4 , the adjustment lens module 2 , the second lens module 3 and the lens barrel 4 are first assembled to form a second lens component, and then the first lens 100 is positioned on the upper end surface of the lens barrel 4 through an active calibration step. The specific assembly method may include the following steps:

Pre-assembly step: the second lens module 3 and the adjustable lens module 2 are respectively fixed and installed in the lens barrel 4, and the second lens component is obtained by assembling;

The capturing step: capturing the first lens module 1 and the second lens component respectively;

Pre-positioning step: arranging the first lens module 1, the second lens part and the photosensitive assembly 6 along the optical axis, so that the optical system (ie the lens assembly) composed of the first lens module 1 and the second lens part can be imaged;

Active calibration step: the photosensitive assembly 6 is powered on to obtain the image formed by the lens assembly, and the imaging quality and adjustment amount of the lens assembly are calculated through a variety of image algorithms (such as SFR, MFT). Actively adjust the relative position between the first lens module 1 and the second lens component and the relative position between the second lens component and the photosensitive assembly 6 in at least one direction in real time, and make the imaging of the lens assembly after one or more adjustments The quality reaches the target value;

Connecting and fixing: the first lens module 1 and the second lens component are fixed at the positions determined by the active calibration step by using an adhesive.

It is worth mentioning that in the active calibration step, the at least one direction refers to the x-axis direction, the y-axis direction, the z-axis direction, the u-axis direction rotating around the x-axis, and the v-axis direction rotating around the y-axis. , at least one of the w-axis directions that rotate around the z-axis, the x-axis, the y-axis, the z-axis, the u-axis, the v-axis, and the w-axis, as shown in FIG. 18 .

Those skilled in the art can understand that, in the active calibration step, the imaging quality includes but is not limited to optical parameters such as peak value, field curvature, astigmatism and the like.

Specifically, the aforementioned assembling method further includes an adhesive laying step: laying the adhesive on the lens barrel 4 of the second lens component. The adhesive placement step may be performed before the pre-positioning step, or may be performed after the active calibration step is completed. It can be understood that, when the adhesive placement step is performed after the active calibration step is completed, the first lens module 1 needs to be removed, and then the adhesive is placed on the lens barrel 4 . The curing method of the adhesive may be, but not limited to, visible light curing, ultraviolet curing, and drying curing.

In some embodiments, in the capturing step, the first lens 100 is directly captured, and the capturing device may act on the side surface of the structural area 112 of the first lens 100 or the side wall of the protruding portion 111 of the first lens 100 1112.

The present application also provides a terminal device including the camera module.

In some preferred embodiments, as shown in FIG. 19 , the terminal device includes a display screen 7, the display screen 7 has an opening 71, and the protruding portion 111 of the first lens 100 of the camera module is embedded in the opening 71, There is a gap between the side wall 1112 of the protruding portion 111 and the inner wall of the opening 71 .

Further, the terminal device further includes a cover plate 8 (not shown in FIG. 18 ) covering the display screen 7 , and the cover plate 8 covers the opening 71 . In some preferred embodiments, there is a gap between the top surface 1111 of the protrusion 111 of the first lens 100 and the cover plate 8 .

The basic principles, main features, and advantages of the present application have been described above. It should be understood by those skilled in the art that the present application is not limited by the above-mentioned embodiments. The above-mentioned embodiments and descriptions describe only the principles of the present application. Without departing from the spirit and scope of the present application, there are various Variations and improvements, which fall within the scope of the claimed application. The scope of protection claimed in this application is defined by the appended claims and their equivalents.

Claims

A camera module is characterized in that it includes a photosensitive assembly and a lens assembly, the lens assembly includes a first lens module, an adjustable lens module, a second lens module and a lens barrel, the first lens module is mounted on the The upper end face of the lens barrel, the adjustable lens module and the second lens module are installed in the lens barrel, and the lens barrel is arranged on the photosensitive component, so that the first lens module, the adjustable lens The adjusting lens module and the second lens module are sequentially maintained on the photosensitive path of the photosensitive assembly along the light entering direction, and the lens assembly further includes a conductive part arranged on the lens barrel, and the conductive part The adjustable lens module is conductively connected with the photosensitive assembly, and the adjustable lens module is adapted to change its optical characteristics according to the electrical signal of the photosensitive assembly, so as to realize the focus adjustment of the camera module.
The camera module according to claim 1, wherein the inner wall of the lens barrel has a mounting platform for mounting the adjustable lens module, and the adjustable lens module is arranged on the upper end surface of the mounting platform , the upper end face of the adjustable lens module is adapted to be deformed when the electrical signal changes to realize focusing, there is a gap between the upper end face of the adjustable lens module and the lower end face of the first lens module, the There is a gap between the side surface of the adjustable lens module and the inner wall of the lens barrel.
The camera module according to claim 2, wherein the conductive part comprises two conductive parts separated from each other, the outer surface of the lens barrel has two laser grooves, and the two conductive parts are respectively formed by a laser direct molding process. in the two laser grooves.
The camera module according to claim 3, wherein the upper end surface of the lens barrel has two pad grooves, the pad grooves have openings on the side of the adjustable lens module, and the lens barrel is further Including pads disposed in the pad grooves, each of the laser grooves communicates with one of the pad grooves, so that the conductive members in the laser grooves are connected to the pad grooves. The pads are conductively connected, and the positive terminal and the negative terminal of the adjustable lens module are respectively conductively connected to the pads in the corresponding pad grooves through electrical connection lines.
The camera module according to claim 2, wherein the conductive part comprises two conductive parts separated from each other, the conductive parts are arranged in the side wall of the lens barrel by an in-mold injection process, and the conductive parts are Both ends of the piece are exposed outside the lens barrel.
The camera module according to claim 2, wherein the upper end surface of the lens barrel is provided with a plurality of glue dispensing grooves, the glue dispensing grooves extend downward from the upper end surface of the lens barrel, and the glue dispensing grooves The side of the groove facing the adjustable lens module has an opening, and the bottom surface of the glue dispensing groove is higher or lower than the upper end surface of the mounting table.
The camera module according to claim 6, wherein the outer frame of the adjustable lens module is rectangular, and the upper end surface of the lens barrel is provided with four glue dispensing grooves, each dispensing glue The groove is opposite to a side wall of the adjustable lens module, the glue dispensing groove deviates from the center line of the side wall of the adjustable lens module opposite to it, and the bottom surface of one of the glue dispensing grooves is higher than the mounting table The upper end face of the other three glue dispensing grooves is lower than the upper end face of the mounting table.
The camera module according to claim 6, wherein the outer frame of the adjustable lens module is rectangular, and the upper end surface of the lens barrel is provided with four glue dispensing grooves, each of which is The glue groove is opposite to a vertex of the adjustable lens module, wherein the bottom surface of one of the glue dispensing grooves is higher than the upper end surface of the mounting table, and the bottom surfaces of the other three glue dispensing grooves are lower than the mounting table the upper end face.
The camera module according to any one of claims 1-8, wherein the first lens module comprises a first lens, and the first lens has a first surface on the object side and a second surface on the image side surface, the central area of the first surface bulges toward the object side to form a protrusion, the first surface also has a structural area surrounding the protrusion, and the top surface of the protrusion forms an optically effective area for imaging , and the sidewall of the protruding portion connects the optically effective area and the structural area.
The camera module according to claim 9, wherein the first lens is made of glass, the diameter of the protruding portion is no more than 1 mm to 2.5 mm, and the height of the protruding portion is no less than 0.3 mm to 1.2 mm. , the angle between the side wall of the protruding portion and the optical axis of the first lens is less than 15°.
The camera module according to claim 9, wherein the first lens module further comprises a light absorbing member disposed around the side wall of the protruding portion, and a top end of the light absorbing member extends to no lower than the protrusion the height of the side wall of the part.
The camera module according to claim 11, wherein the light absorbing member is disposed close to the side wall of the protruding portion, and the light absorbing member has a first side surface close to the side wall of the protruding portion, away from the side wall of the protruding portion. The second side of the side wall of the protruding part and the third surface connecting the top of the first side and the top of the second side, the height of the top of the first side is lower than the height of the top of the second side, so At least a section of the third surface is an inclined surface.
The camera module according to claim 12, wherein the top ends of the first side surface and the second side surface both extend to a height not lower than the side wall of the protruding portion, and the third surface passes through Rough treatment and/or an anti-reflection light absorbing layer is coated on the third surface.
The camera module according to claim 9, wherein the first lens is connected to the upper end surface of the lens barrel by an adhesive, and the adhesive is cured to hold the first lens in the On the lens barrel, the relative position of the first lens module and the lens module in the lens barrel is determined by the active calibration step.
The camera module according to any one of claims 1-8, wherein the photosensitive component comprises a circuit board, a photosensitive chip, a filter element and a lens base, and the photosensitive chip is arranged on the circuit board and is connected with the circuit board. The circuit board is electrically connected, the lens base is arranged on the circuit board, the lens assembly is held above the photosensitive chip by the lens base, and the filter element is held on the photosensitive chip by the lens base. Between the lens assembly and the photosensitive chip, the lens barrel is arranged on the upper end surface of the lens base, and the photosensitive assembly further includes a lens seat conductive part arranged on the lens base, and the lens seat conducts electricity The part electrically connects the conductive part and the circuit board.
The camera module according to claim 15, wherein the conductive part comprises two conductive parts separated from each other, the outer surface of the lens barrel has two laser grooves, and the two conductive parts are respectively formed by a laser direct molding process. In the two laser grooves, the conductive part of the mirror base includes two mirror base conductive parts separated from each other, the outer surface of the lens base has two mirror base laser grooves, and the two mirror base conductive parts are directly formed by a laser process. They are respectively arranged in the laser grooves of the two mirror bases, the first ends of the two mirror base conductive parts are respectively conductively connected with the second ends of the two conductive parts, and the second ends of the two mirror base conductive parts are respectively connected with the second end of the two conductive parts. The circuit board is electrically connected, and the first ends of the two conductive members are respectively electrically connected to the adjustable lens module.
The camera module according to any one of claims 1-8, wherein the adjustable lens module comprises a piezoelectric film, a diaphragm, a flexible transparent film, a lens body and a glass base layer arranged in sequence along the light-incident direction, The adjustable lens module further includes an elastic base surrounding the peripheral side of the lens body, the elastic semi-flexible transparent film, the diaphragm and the edge of the piezoelectric film are supported by the elastic base, and the pressure The electric film has a light-transmitting area in the middle to allow light to pass through, the diaphragm is used to limit the imaging range, the glass base layer is used to support the lens body, and the piezoelectric film is suitable for deformation when current is applied, so When the piezoelectric film is deformed, it is suitable for pressing the flexible transparent film and the lens body, so that the upper end surface of the lens body forms a spherical surface, so as to realize focusing.
A terminal device, characterized by comprising the camera module according to any one of claims 1-17.
The terminal device according to claim 18, characterized in that it comprises a display screen with an opening, the first lens module comprises a first lens, the first lens has a first surface on the object side and a first surface on the image side the second surface of the first surface, the central area of the first surface bulges toward the object side to form a protrusion, the first surface also has a structure area surrounding the protrusion, and the top surface of the protrusion forms a surface for imaging In the optically effective area, the sidewall of the protruding portion connects the optically effective area and the structural area, and the protruding portion is embedded in the opening.