CN210442561U

CN210442561U - Split type camera lens, camera module and terminal equipment

Info

Publication number: CN210442561U
Application number: CN201921521104.1U
Authority: CN
Inventors: 田中武彦
Original assignee: Ningbo Sunny Opotech Co Ltd
Current assignee: Ningbo Sunny Opotech Co Ltd
Priority date: 2019-09-12
Filing date: 2019-09-12
Publication date: 2020-05-01
Anticipated expiration: 2029-09-12

Abstract

The application relates to a split type camera lens, a camera module and a terminal device. This split type camera lens includes: a first lens portion including a first optical lens and a second lens portion. The first optical lens includes a structured region and a protrusion extending protrudingly from the structured region, wherein at least a portion of an upper surface of the protrusion forms an optical region of the first optical lens. The second lens part comprises a lens barrel and at least one second optical lens arranged in the lens barrel, and the first lens part is assembled on the second lens part. The split-type lens further comprises a shielding element arranged on the side wall of the protruding portion, and when the split-type lens is assembled on the terminal device, the shielding element is arranged in a gap between the side wall of the opening of the display screen of the terminal device and the first optical lens so as to reduce external stray light entering the split-type lens through the gap between the side wall of the opening and the first optical lens.

Description

Split type camera lens, camera module and terminal equipment

Technical Field

The application relates to the field of camera modules, in particular to a split type lens, a camera module and a terminal device.

Background

With the popularization of mobile electronic devices, technologies related to camera modules applied to mobile electronic devices for helping users to obtain images (e.g., videos or images) have been rapidly developed and advanced, and in recent years, camera modules have been widely applied to various fields such as medical treatment, security, industrial production, and the like.

In the field of consumer electronics (e.g., in the field of smart phones), a front camera module is an indispensable component. The front-mounted camera module and the display screen of the terminal device are arranged on the same side and used for meeting the requirements of self-timer of consumers and the like. However, the increasing "screen occupation ratio" has put increasing demands on the structure and arrangement of the front camera module. In order to reduce the influence of the front camera module on the improvement of the screen occupation ratio, different manufacturers develop various solutions from different angles.

One solution direction is: and a through hole is formed in a display screen of the terminal equipment. Specifically, in order to hide the front camera module, some manufacturers choose to open a U-shaped hole at the top end of the display screen of the terminal device, and place sensing devices such as the front camera module and the receiver in the U-shaped hole. However, since the front camera module is the largest in volume in the front sensor, a large U-shaped hole is required, which has a large influence on the "screen occupation ratio". In order to reduce the influence of the opening on the improvement of the screen occupation ratio, some manufacturers change the U-shaped hole into a water-drop shape, but the opening cannot be made smaller due to the self structure of the front camera module and the limitation of the screen opening process. Some manufacturers choose to open circular or elliptical openings on the LCD or OLED display screen, so that the size of the openings is still large, and the openings are very abrupt when the terminal device displays a screen, which affects user experience.

Some manufacturers have proposed a solution for directly disposing the camera module under the screen, in which the front camera module forms an image through the screen. For example, some manufacturers choose to provide a blind hole on the screen of the terminal device, and the front camera module forms an image through the blind hole, where the blind hole refers to removing a layer with low light transmittance and an unnecessary layer in an area corresponding to the front camera module on the display screen, so as to increase the light transmittance. Although this approach balances light transmittance and aesthetics, light transmittance is still not high enough to achieve good imaging quality.

Accordingly, there is a need for an improved front camera module configuration and optical design.

SUMMERY OF THE UTILITY MODEL

The main objective of the present application is to provide a split type camera lens, a camera module and a terminal equipment, the optical lens of the camera module adopts the optical design scheme of the small head to reduce the opening size of the display screen of the terminal equipment, and the head of the optical lens is provided with a shielding element, so that when the camera module is assembled in the terminal equipment, the shielding element is arranged in the side wall of the opening and the gap between the optical lenses, so as to reduce the passing through of the side wall of the opening and the gap between the optical lenses enters the external stray light of the camera module. Therefore, the size of the opening of the display screen is reduced by changing the optical design scheme of the camera module, and the stray light prevention performance of the camera module is reinforced by the shielding element so as to improve the imaging quality.

Another object of the present application is to provide a split type lens, a camera module and a terminal device, wherein the optical lens is a split type lens, and an optical design scheme of a "bare lens" is adopted by a first lens portion located at the topmost end in the split type lens (that is, the first lens portion only includes a first optical lens), wherein the first optical lens includes a structural region and a protruding portion which protrudes and extends in the structural region to form an optical design scheme of a small head. Like this, when the module of making a video recording is assembled in terminal equipment, first lens part the bellying embedding is to the trompil of display screen in to the reduction the module of making a video recording with the distance between the trompil upper end of display screen, thereby the increase the effective angle of view of the module of making a video recording guarantees the daylighting volume of the module of making a video recording.

Another object of the present application is to provide a split type camera lens, a camera module and a terminal device, wherein, the shielding element is disposed in the protruding portion of the first lens portion, so that when the camera module is assembled in the terminal device, the shielding element is filled in the sidewall of the opening and the gap between the protruding portions, so as to reduce the passage of the sidewall of the opening and the gap between the protruding portions enters the external stray light of the camera module. Therefore, the anti-stray light performance of the camera module is improved through the shielding element while the effective field angle of the camera module is increased to ensure the lighting quantity of the camera module.

Another object of the present application is to provide a split type lens, a camera module and a terminal device, wherein the shielding element can improve the precision of the split type lens assembled in the opening of the display screen to improve the installation coaxiality between the two.

Another object of the present application is to provide a split type lens, a camera module and a terminal device, wherein the shielding element circumferentially shields at least a part of the protruding portion of the first optical lens, so that it is not necessary to provide a light shielding layer on the shielded part of the protruding portion, thereby reducing the processing difficulty and the processing cost of the first optical lens.

Another objective of the present application is to provide a split type lens, a camera module and a terminal device, wherein the shielding element can effectively protect the first optical lens and reduce the damage to the first optical lens caused by unnecessary impact of the terminal device.

Other advantages and features of the present application will become apparent from the following description and may be realized by means of the instrumentalities and combinations particularly pointed out in the appended claims.

To achieve at least one of the above objects or advantages, the present application provides a split type lens including:

a first lens portion comprising a first optical lens, the first optical lens comprising a structured zone and a boss extending protrudingly from the structured zone, wherein at least a portion of an upper surface of the boss forms an optical zone of the first optical lens; and

the split-type lens further comprises a shielding element arranged on the side wall of the protruding portion, and when the split-type lens is assembled on the terminal device, the shielding element is arranged in a gap between the side wall of the opening of the display screen of the terminal device and the first optical lens so as to reduce outside stray light entering the split-type lens through the gap between the side wall of the opening and the first optical lens.

In the split type lens according to the present application, the shielding member is circumferentially disposed on the sidewall of the protrusion to cover at least a portion of the sidewall of the protrusion.

In the split type lens according to the present application, an upper surface of the shielding member exceeds a height of the sidewall of the protrusion.

In a split type lens according to the present application, the shielding member further covers at least a part of a transition region between a sidewall and an upper surface of the boss, the transition region having a length of 0.03 to 0.05mm in a direction from the sidewall of the boss toward a center of the boss.

In the split type lens according to the present application, the shielding member extends downward until a lower surface of the shielding member contacts an upper surface of the structure region to completely cover the side wall of the protrusion.

In the split type lens according to the present application, a portion of the inner side surface of the shielding member corresponding to the first optical lens has a shape adapted to the first optical lens so that the shielding member can be fittingly disposed to the side wall of the convex portion.

In the split type lens according to the present application, when the side wall of the boss is perpendicular to the upper surface of the structure region, the inner side surface of the shielding member includes a vertical surface matching with the side wall and an arc surface fitting with the transition region.

In the split type lens according to the present application, when the side wall of the boss is inclined to the upper surface of the structure region, the inner side surface of the shielding member includes an inclined surface adapted to the side wall and an arc-shaped surface adapted to the transition region.

In the split-type lens according to the present application, an included angle range between the side wall of the boss portion and the optical axis set by the first optical lens is less than 15 °.

In the split type lens according to the present application, the shape of the outer side surface of the shielding member is adapted to the shape of the side wall of the aperture.

In the split type lens according to the present application, the outer side surface of the shielding member conforms to the shape of the inner side surface of the shielding member.

In the split type lens according to the present application, the shielding member includes an inclined surface in an outer side surface thereof, the inclined surface being inclined inward.

In the split type lens according to the present application, the shielding member has an inclined surface extending obliquely inward from a tip end of the shielding member toward an inner side surface of the shielding member.

In a split type lens according to the present application, the shielding element includes a light shielding layer formed on the inclined surface.

In the split type lens according to the present application, the inclined surface has a certain roughness.

In a split type lens according to the present application, the shielding element includes a light shielding layer disposed on an upper surface of the shielding element.

In the split type lens according to the present application, the upper surface of the shielding member has a certain roughness.

In the split type lens according to the present application, the first optical lens includes a light shielding layer provided on a side wall portion of the convex portion which is not covered by the shielding element.

In the split-type lens according to the present application, the shielding element is directly sleeved on the sidewall of the protrusion.

In the lens barrel according to the present application, the shielding member is assembled to the sidewall of the protrusion portion by an adhesive.

In the lens barrel according to the present application, the adhesive has a thickness of 0.02 to 0.05 mm.

According to another aspect of the present application, the present application further provides a camera module, including:

the split lens as described above; and

the split type lens is kept on a photosensitive path of the photosensitive assembly.

In the camera module according to the application, the camera module further comprises a driving element, wherein the driving element is installed on the photosensitive assembly, and the optical lens is installed on the driving element.

According to another aspect of the present application, there is also provided a terminal device, including:

the module of making a video recording includes: the split lens as described above; and a photosensitive assembly, wherein the split type lens is kept on a photosensitive path of the photosensitive assembly; and

the terminal equipment comprises a display screen with an opening, wherein the camera module and the display screen are arranged on the same side of the terminal equipment and are configured to be a front camera module, and when the camera module is assembled on the terminal equipment, the split type lens of the camera module is embedded in the opening.

In a terminal device according to the application, the outer side of the shielding element has a shape adapted to the side wall of the opening.

In a terminal device according to the present application, an outer side surface of the shielding member includes an inclined surface inclined inward.

In the terminal equipment according to the application, the offset between the central axis of the split type lens and the central axis of the opening is less than 0.012.

Further objects and advantages of the present application will become apparent from an understanding of the ensuing description and drawings.

These and other objects, features and advantages of the present application will become more fully apparent from the following detailed description, the accompanying drawings and the claims.

Drawings

The above and other objects, features and advantages of the present application will become more apparent by describing in more detail embodiments of the present application with reference to the attached drawings. The accompanying drawings are included to provide a further understanding of the embodiments of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application. In the drawings, like reference numbers generally represent like parts or steps.

Fig. 1 is a schematic diagram illustrating a conventional camera module assembled in a terminal device.

Fig. 2 illustrates a schematic diagram after an optical design improvement of an existing camera module.

Fig. 3 is a schematic diagram illustrating the relative position relationship between the first lens part of the improved camera module and the opening of the display screen.

Fig. 4 illustrates a schematic diagram of a camera module according to an embodiment of the present application.

Fig. 5 is a schematic diagram illustrating that the camera module according to the embodiment of the present application is assembled in a terminal device.

Fig. 6 is a schematic diagram illustrating that the split type lens is embedded in an opening of a display screen in the camera module according to the embodiment of the application.

Fig. 7 is a partial schematic view illustrating a split type lens according to a modified embodiment of the present application being fitted in an opening of a display screen.

Fig. 8 is a partial schematic view illustrating a split type lens according to another modified embodiment of the present application fitted in an opening of a display screen.

Fig. 9 is a partial schematic view illustrating a split type lens according to still another modified embodiment of the present application fitted in an opening of a display screen.

Fig. 10 is a partial schematic view illustrating a split type lens according to still another modified embodiment of the present application fitted in an opening of a display screen.

Fig. 11 is a partial schematic view illustrating a split type lens according to still another modified embodiment of the present application fitted in an opening of a display screen.

Fig. 12 illustrates a schematic diagram of a terminal device according to an embodiment of the application.

FIG. 13 illustrates a partial schematic diagram of the terminal device implemented in accordance with the present application.

Detailed Description

Hereinafter, example embodiments according to the present application will be described in detail with reference to the accompanying drawings. It should be understood that the described embodiments are only some embodiments of the present application and not all embodiments of the present application, and that the present application is not limited by the example embodiments described herein.

Summary of the application

As described above, in order to reduce the influence of the front camera module on the improvement of the "screen occupation ratio", different manufacturers have developed various solutions from different angles. However, these solutions are more or less unable to simultaneously meet the requirements of further reducing the aperture of the display screen to continue to improve the "screen occupation ratio" and ensure the imaging quality of the front camera module.

Specifically, the existing front camera module generally includes a photosensitive component for photosensitive imaging and an optical lens retained on a photosensitive path of the photosensitive component. According to the structure, the optical lens includes an integral type lens and a split type lens. Fig. 1 is a schematic diagram illustrating a conventional camera module assembled in a terminal device. As shown in fig. 1, the camera module includes a split-type lens and a photosensitive assembly, the split-type lens includes a first lens portion 11 and a second lens portion 12, wherein the first lens portion 11 includes a first optical lens 111 and a first barrel 112 for mounting the first optical lens 111, and the second lens portion 12 includes at least one second optical lens 121 and a second barrel 122 for accommodating the at least one optical lens 121. When assembling this camera module in terminal equipment, from the size, the head size of current camera module all is more than 3mm, in order to cooperate the head size of camera module, and the size of screen trompil 3 needs to be big enough. And after arranging the camera module in the screen, considering the requirement of the angle of view of the camera module (the side wall of the screen opening 3 can influence the camera module to collect light), the screen opening 3 also needs to be made large enough. At present, the size of the screen opening 3 is at least more than 4.5mm, so the screen opening 3 with the size causes poor display effect of the screen, and the screen opening 3 is very obtrusive when the terminal device performs screen display, which affects user experience.

In order to reduce the size of the opening of the display screen, the inventor of the application proposes a 'small head' optical design scheme. Specifically, fig. 2 illustrates a schematic diagram after an optical design improvement is performed on an existing camera module. As shown in fig. 2, in the improved split lens, the first lens portion 11 adopts the optical design of a bare lens, that is, the first lens portion 11 only includes the first optical lens 111. Furthermore, the first optical lens 111 includes a structure region 113 and a protrusion 114 protrudingly extending from the structure region 113 to form an optical design of a small head.

Fig. 3 illustrates a schematic diagram of the relative position relationship between the first lens portion 11 of the improved camera module and the display screen opening 3. As shown in fig. 3, when the camera module is assembled in a terminal device, the protrusion 114 of the first lens portion 11 is inserted into the display opening 3 to reduce the distance between the camera module and the upper end of the display opening 3, so as to increase the effective field angle of the camera module and increase the lighting amount of the camera module.

However, since the improved camera module directly fits the first optical lens 112 into the display opening 3, on one hand, the display opening 3 needs to satisfy a certain aperture size (the size of the display opening 3 is not greater than 3.0mm through testing) in consideration of the requirement of the angle of view of the camera module, and on the other hand, in consideration of the assembly eccentricity tolerance between the display opening 3 and the first optical lens 112, a certain eccentricity tolerance space needs to be reserved and a certain gap (usually, the gap is not less than 0.15mm) needs to be reserved between the top end of the protruding portion 114 and the top cover plate of the display opening 3 (usually, the cover plate of the display does not have an opening). As shown in fig. 3, the end result is that a certain gap D needs to be reserved between the sidewall of the display screen opening 3 and the convex portion 114 of the first optical lens 111. Due to the presence of this gap D, some veiling glare is caused, because: even if a light shielding layer (e.g., an ink layer) is disposed in the first optical lens 111 except for the optical area, a part of light rays incident on the sidewall of the opening 3 of the display screen still enter the optical area of the first optical lens 111 to participate in imaging after being reflected by the sidewall of the opening 3, wherein the part of light rays can carry other information after being reflected by the mirror, thereby adversely affecting the imaging quality of the camera module.

Based on this improvement thinking, the basic idea of this application is in split type optical lens's head sets up shielding element to make when the module of making a video recording assembles in terminal equipment, shielding element set up in the lateral wall of trompil with in the clearance between the optical lens, in order to be used for reducing through the lateral wall of trompil with clearance between the optical lens gets into the external veiling glare of module of making a video recording.

Based on this, the present application provides a split type lens, which includes: a first lens portion and a second lens portion comprising a first optical lens, wherein the first optical lens comprises a structured zone and a protrusion extending protrudingly from the structured zone, wherein at least a portion of an upper surface of the protrusion forms an optical zone of the first optical lens; the second lens part comprises a lens barrel and at least one second optical lens arranged in the lens barrel, and the first lens part is assembled on the second lens part. In particular, the split-type lens further includes a shielding element disposed on a sidewall of the protrusion, and when the split-type lens is assembled in a terminal device, the shielding element is disposed in a gap between a sidewall of an opening of a display screen of the terminal device and the first optical lens, so as to reduce external stray light entering the split-type lens through the gap between the sidewall of the opening and the first optical lens. Therefore, the size of the opening of the display screen is reduced by changing the optical design scheme of the camera module, and the stray light prevention performance of the camera module is reinforced by the shielding element so as to improve the imaging quality. In addition, the shielding element can also play a positioning role in the process that the camera module is assembled in the hole of the display screen, so that the assembly tolerance is reduced.

Having described the general principles of the present application, various non-limiting embodiments of the present application will now be described with reference to the accompanying drawings.

Exemplary camera module and split type lens thereof

As shown in fig. 4 to 6, the camera module 10 according to the embodiment of the present application is illustrated, wherein the camera module 10 is configured as a front camera module 10 of a terminal device, and is used for meeting the requirements of a user such as self-timer shooting. In the embodiment of the present application, the terminal device includes, but is not limited to, a smart phone, a tablet computer, a wearable device, and the like.

In the embodiment of the present application, the camera module 10 includes a split-type lens 20 and a photosensitive element 30, the split-type lens 20 is kept in a photosensitive path of the photosensitive element 30, so that light collected by the optical lens can form an image in the photosensitive element 30 along the photosensitive path. In particular, in the embodiment of the present application, the split type lens 20 includes at least two lens portions; the photosensitive assembly 50 includes a circuit board 51, a photosensitive chip 52 electrically connected to the circuit board 51, at least one electronic component 53 disposed on the circuit board 51, and a package 54 disposed on the circuit board 51, wherein the split lens 20 is mounted on the package 54.

It should be noted that, as shown in fig. 4, the camera module 10 is a fixed-focus camera module, and those skilled in the art should know that the camera module 10 related to the present application can also be implemented as a moving-focus camera module, that is, the camera module 10 further includes a driving element (not shown) disposed between the split-type lens 20 and the photosensitive component 50, so that the split-type lens 10 is carried by the driving element to move along the photosensitive path, so as to change the distance between the split-type lens 10 and the photosensitive component 50. Of course, the camera module 10 according to the present application may also be implemented as an optical anti-shake camera module, that is, the camera module 10 further includes an anti-shake motor (not shown) disposed between the split lens 20 and the photosensitive assembly 30, so as to eliminate the influence of image quality caused by inadvertent shake during shooting through the anti-shake motor.

As shown in fig. 4, in the embodiment of the present application, the split type lens 20 includes two lens portions: the lens comprises a first lens part 21 and a second lens part 22, wherein the first lens part 21 comprises a first optical lens 211, and the second lens part 22 comprises a lens barrel 222 and at least one second optical lens 221 installed in the lens barrel 222. In particular, in the embodiment of the present application, the first lens portion 21 includes only the first optical lens 211, that is, the first lens portion 21 is a "bare lens" which does not include a lens barrel for supporting the first optical lens 211. In the assembling process, the first optical lens 211 can be assembled to the second lens portion 22 in a manner of being adhered to the second optical lens 221 located at the topmost side of the second lens portion 22 by an adhesive. Of course, in other examples of the present application, the first optical lens 211 can be assembled to the second lens portion 22 in other manners, for example, the first optical lens 211 can be assembled to the second lens portion 22 by being adhered to the second optical lens 221 and the lens barrel 222 at the top side by an adhesive; for another example, the first optical lens 211 can be assembled to the second lens portion 22 by being adhered to the lens barrel 222 of the second lens portion 22 by an adhesive, which is not limited in the present application.

In particular, in the present embodiment, the split lens 20 has a structural configuration of "small head". Specifically, as shown in fig. 4, in the present application, the first optical lens 211 includes a structural region 212 and a protrusion 213 protruding upward from an upper surface of the structural region 212 to form a "small head" structural configuration. In particular, in the embodiment of the present application, the height of the protruding portion 213 is not less than 0.5mm, and the width is not more than 2.0mm (preferably, the width of the protruding portion is not more than 1.5mm), wherein the height of the protruding portion 213 represents the distance between the highest point of the protruding portion 213 and the upper surface of the structure region 212, and the width of the protruding portion 213 represents the lateral maximum dimension of the protruding portion 213. Also, in the embodiment of the present application, the optical area of the first optical lens 211 is formed on the upper surface of the protrusion 213, that is, in the embodiment of the present application, at least a portion of the upper surface of the protrusion 213 forms the optical area of the first optical lens 211, so as to allow external light to enter the split lens 20 through the optical area. In contrast, the first optical lens 211 is a non-optical zone of the first optical lens 211 except for the optical zone, where the non-optical zone denotes a portion of the first optical lens 211 that does not participate in imaging of the light transmission.

It should be understood that when the camera module 10 is assembled in a terminal device as a front camera module 10, the protrusion 213 of the split lens 20 can be embedded more deeply in the hole 810 of the display screen 81 of the terminal device, so that the optical area of the first optical lens 211 can be closer to the top end of the hole 810 to obtain a larger field angle and light transmission amount. However, if the first optical lens 211 is directly fitted into the opening 810 of the display 81, on one hand, the opening 810 of the display 81 needs to satisfy a certain aperture size (the size of the small aperture of the display 81 is not larger than 2.0mm as tested) in consideration of the requirement of the angle of view of the camera module 10; on the other hand, considering the assembly eccentricity tolerance between the opening 810 of the display 81 and the first optical lens 211, a certain eccentricity tolerance space needs to be reserved and a certain gap (usually, the gap is not less than 0.15mm) needs to be reserved between the top end of the boss 213 and the top cover plate of the opening 810 of the display 81 (usually, the cover plate of the display 81 is not opened). If this is the case, it is finally resulted that a certain gap D needs to be reserved between the sidewall of the opening 810 of the display 81 and the convex portion 213 of the first optical lens 211. Due to the existence of the gap D, even if a light shielding layer (e.g., an ink layer) is disposed in the first optical lens 211 except for the optical area, a part of the light rays which are irradiated on the sidewall of the opening 810 of the display screen 81 enter the optical area of the first optical lens 211 after being reflected by the sidewall of the opening 810 to participate in imaging, wherein the reflected part of the light rays carries other information, thereby adversely affecting the imaging quality of the camera module 10. That is, due to the existence of the gap D, stray light may be generated, affecting the imaging quality.

In order to solve the above technical problem, in the embodiment of the present application, the separate type lens 20 further includes a shielding element 30 disposed on a sidewall of the protrusion 213, so that when the separate type lens 20 is assembled in a terminal device, the shielding element 30 is filled in a gap between a sidewall of the opening 810 of the display 81 of the terminal device and the first optical lens 211, so as to reduce external stray light entering the separate type lens 20 through the gap between the sidewall of the opening 810 and the first optical lens 211, as shown in fig. 5.

Specifically, as shown in fig. 4, in the embodiment of the present application, the shielding element 30 is circumferentially disposed on the sidewall of the protrusion 213 to cover at least a portion of the sidewall of the protrusion 213. That is, in the present embodiment, the shielding member 30 has a ring-shaped structure to cover at least a portion of the sidewall of the protrusion 213. In addition, the shielding element 30 has a light absorption function, so that, as shown in fig. 6, when the lens 20 is assembled in a terminal device, light irradiated on the sidewall of the opening 810 of the display 81 is reflected to the shielding element and then absorbed by the shielding element, and thus, external stray light entering the lens 20 through the gap between the sidewall of the opening 810 and the first optical lens 211 is reduced. In a specific implementation, the shielding element 30 may be made of a light absorbing material, or a light shielding layer is disposed on an outer surface of the shielding element 30, so that the shielding element 30 has a light absorbing function, which is not limited in this application.

Further, as shown in fig. 6, in the embodiment of the present application, the upper surface of the shielding element 30 exceeds the height of the sidewall of the protruding portion 213, that is, the top end of the shielding element 30 is higher than the highest point of the sidewall of the protruding portion 213, so that the shielding element 30 can maximally cover the optical area formed on the upper surface of the protruding portion 213, so as to prevent external stray light from entering the optical area after being reflected at the sidewall of the opening 810 of the display screen 81.

Preferably, in the present embodiment, the shielding element 30 further covers at least a part of a transition region between the sidewall of the protrusion 213 and the upper surface thereof, wherein the length of the transition region in a direction from the sidewall of the protrusion 213 to the center of the protrusion 213 is 0.03-0.05 mm. Of course, in other examples of the present application, the shielding element 30 may not cover at least a portion of the transition region between the sidewall of the protrusion 213 and the upper surface thereof, and is not limited to the present application. Also, in the embodiment of the present application, the shielding element 30 extends downward until the lower surface of the shielding element 30 contacts the upper surface of the structural region 212 to completely cover the sidewall of the protrusion 213.

Of course, in the embodiment of the present application, the downward extending length of the shielding element 30 is not limited to the present application, for example, in other examples of the present application, the shielding element 30 extends downward but does not contact with the upper surface of the structural region 212 (that is, the upper portion of the sidewall of the protruding portion 213 is covered by the shielding element 30, and the lower portion thereof is in an exposed state), as shown in fig. 9. It will be understood by those skilled in the art that in the embodiment of the present application, the height of the shielding element 30 should be set to meet the requirement of the viewing angle and to generate no stray light or minimal stray light, and the specific selection value is not limited to the present application.

Further, as shown in fig. 5 and 6, in the embodiment of the present application, a portion of the inner side surface 31 of the shielding member 30 corresponding to the first optical lens 211 has a shape adapted to the first optical lens 211, so that the shielding member 30 can be fittingly disposed on the side wall of the protruding portion 213.

Specifically, in the split lens 20 illustrated in fig. 4, the side wall of the protrusion 213 is perpendicular to the upper surface of the structural region 212, that is, the inner side surface 31 of the protrusion 213 is a vertical surface. Accordingly, in order to adapt to the shape configuration of the boss 213, the inner side surface 31 of the shielding element 30 includes a vertical surface matching with the side wall and an arc surface matching with the transition region, so that the shielding element 30 can be fittingly sleeved on the side wall of the boss 213 to protect the boss 213 therein.

It is worth mentioning that in other examples of the present application, the sidewall of the protrusion 213 may be implemented in other shapes. For example, in the modified implementation of the split lens 20 as illustrated in fig. 10, the sidewalls of the protrusions 213 are inclined to the upper surface of the structure region 212. Accordingly, in order to adapt to the shape configuration of the boss 213, the inner side surface 31 of the shielding element 30 includes an inclined surface adapted to the side wall and an arc surface adapted to the transition region, so that the shielding element 30 can be fittingly sleeved on the side wall of the boss 213 to protect the boss 213 therein. Of course, in other examples of the present application, the sidewall of the protruding portion 213 may also be configured in other shapes (e.g., a step shape, etc.), and accordingly, the inner side surface 31 of the shielding element 30 may also be adapted and adjusted, which is not described in detail herein.

It should be noted that, when the sidewall of the protrusion 213 is inclined to the upper surface of the structural region 212, an included angle between the sidewall of the protrusion 213 and the optical axis set by the first optical lens 211 is preferably less than 15 °. Moreover, when the sidewall of the protrusion 213 is inclined to the upper surface of the structural region 212, the eccentricity tolerance between the camera module 10 and the terminal device when the camera module 10 is assembled in the terminal device can be reduced to be not less than 0.1, and the size of the opening 810 of the display 81 can be reduced.

Further, as shown in fig. 5 and 6, in the present embodiment, the shape of the outer side surface 32 of the shielding member 30 is adapted to the shape of the sidewall of the opening 810. As will be appreciated by those of ordinary skill in the art, the openings 810 of the display 81 are typically cylindrical holes. Accordingly, in the embodiment of the present application, the outer side surface 32 of the shielding element 30 is configured as a cylindrical surface, so that when the camera module 10 is assembled in the terminal device, the outer side surface 32 of the shielding element 30 can be fittingly abutted against the hole wall of the hole 810 of the display screen 81, so that on one hand, the installation coaxiality of the camera module 10 and the hole 810 of the display screen 81 can be improved, and on the other hand, the shielding element 30 can more fully fill the gap between the first optical lens 211 and the hole wall of the hole 810 of the display screen 81, so as to achieve the effect of preventing stray light. Specifically, in the embodiment of the present application, the installation coaxiality of the camera module 10 and the opening 810 of the display screen 81 is less than 0.012mm, and even less than 0.006mm, through the shielding element 30.

Fig. 11 illustrates a schematic diagram of another variant implementation of the split lens 20 according to an embodiment of the present application, wherein the split lens 20 as illustrated in fig. 11 is the variant implementation of the split lens 20 illustrated in fig. 10. In this variant embodiment, the side walls of the projections 213 are inclined with respect to the upper surface of the structure region 212, while the outer side 32 of the shielding element 30 is shaped to match the side walls of the opening 810, i.e. the outer side 32 of the shielding element 30 is configured as a cylinder, as shown in fig. 10.

Of course, in other examples of the present application, the outer side surface 32 of the shielding element 30 may be configured in other shapes, which is not limited to the present application. For example, in the modified implementation of the split lens 20 as illustrated in fig. 10, the outer side surface 32 of the shielding member 30 is conformed to the shape of the inner side surface 31 of the shielding member 30, so that the shielding member 30 has a uniform structure. Specifically, as shown in fig. 10, the outer side surface 32 of the shielding member 30 and the inner side surface of the shielding member 30 are both inclined surfaces 31.

In order to enhance the effect of preventing stray light, it is preferable that, in the embodiment of the present application, the shielding member 30 has an inclined surface 33 extending obliquely inward from the top end of the shielding member 30 toward the inner side surface 31 of the shielding member 30. More preferably, in order to further enhance the effect of preventing stray light, the inclined surface 33 may be optimized, for example, the inclined surface 33 may be roughened to reduce light reflection and reduce stray light; for example, a light shielding layer may be provided on the inclined surface 33 to absorb stray light irradiated to the inclined surface 33. Of course, in order to further enhance the effect of preventing stray light, the upper surface of the shielding element 30 may be roughened, or a light shielding layer may be provided on the upper surface of the shielding element 30.

It should be noted that in other examples of the present application, an inclined surface may not be provided between the top end of the shielding element 30 and the inner side surface 31 of the shielding element 30, as shown in fig. 8, which is not intended to limit the present application.

Fig. 7 is a schematic diagram illustrating still another variant implementation of the split lens 20 according to an embodiment of the present application. In this variant, as shown in fig. 7, in order to further enhance the effect of preventing stray light, an inclined surface 34 inclined inward is provided on the outer side surface 32 of the shielding element 30, so that the light reflected at the side wall of the opening 810 of the display screen 81 is further blocked from entering the split lens 20. It is worth mentioning that the inclined surface is provided on the outer side surface 32 of the shielding member 30, and the bonding space between the first optical lens 211 and the sidewall of the opening 810 of the display screen 81 can be increased.

It should be noted that, in the embodiment of the present application, since the shielding element 30 covers at least a portion of the sidewall of the protrusion 213 and the shielding element 30 has a light absorption effect, in the embodiment of the present application, a light shielding layer may not be disposed on the portion of the sidewall of the protrusion 213 covered by the shielding element 30. That is to say, in the embodiment of the present application, the shielding element 30 circumferentially covers at least a portion of the protruding portion 213 of the first optical lens 211, so that it is not necessary to provide a light shielding layer on the portion of the protruding portion 213 to be shielded, and the processing difficulty and the processing cost of the first optical lens 211 are reduced. Moreover, since it is not necessary to provide a light shielding layer on the portion of the protrusion 213 to be shielded, the light shielding element is engaged with the sidewall of the first optical lens 211, and the assembling accuracy between the two can be improved.

Specifically, in the split lens 20 as illustrated in fig. 4, the shielding member 30 extends downward until the lower surface of the shielding member 30 contacts the upper surface of the structure region 212 to completely cover the sidewall of the protrusion 213; at the same time, the shielding element 30 extends upwards to cover at least a part of the transition region between the side wall and the upper surface of the boss 213. Accordingly, it is not necessary to provide a light shielding layer on the entire side wall of the protrusion 213 and a portion of the transition region between the side wall and the upper surface of the protrusion 213, which is covered by the shielding element 30, so as to reduce the processing difficulty and the processing cost of the first optical lens 211. For another example, in the split lens 20 illustrated in fig. 9, the shielding element 30 extends downward but does not extend to contact the upper surface of the structure region 212 to partially cover the sidewall of the protrusion 213; at the same time, the shielding element 30 extends upwards to cover at least a part of the transition region between the side wall and the upper surface of the boss 213. Accordingly, it is not necessary to provide a light shielding layer on a portion of the side wall of the protruding portion 213 covered with the shielding element 30 and a portion of the side wall of the protruding portion 213 covered with the shielding element 30 in the transition region between the side wall and the upper surface, and a light shielding layer 214 is provided on a portion of the side wall of the protruding portion 213 not covered with the shielding element 30. That is, in the separate type lens 20 as illustrated in fig. 9, the light shielding layer 214 provided on the convex portion 213 and the shielding member 30 together constitute a stray light prevention system of the separate type lens 20.

It should be noted that, in the embodiment of the present application, the shielding element 30 can be directly sleeved on the sidewall of the protruding portion 213. Accordingly, the inner diameter of the shielding element 30 is slightly larger than the lateral dimension of the protrusion 213, and the shape of the inner side surface of the shielding element 30 is adapted to the shape of the side wall of the protrusion 213, so that the shielding element 30 can be directly sleeved on the side wall of the protrusion 213. Alternatively, the shielding element 30 is sleeved on the sidewall of the protrusion 213 by an adhesive 40. Accordingly, the adhesive 40 is applied between the sidewall of the protrusion 213 and the inner side of the shielding member 30, wherein the thickness of the adhesive 40 is in the range of 0.02mm to 0.05 mm.

It is also worth mentioning that in the embodiment of the present application, the first optical lens 211 can be implemented as a plastic lens, which can be injection molded by plastic and cut and polished to a desired shape. Of course, in other examples of the present application, the first optical lens 211 may also be implemented as a glass lens, which may be prepared by a molding glass process and cut or ground into a desired shape. In particular, in the embodiment of the present application, the first optical lens 211 particularly has a structure of "small head", and the overall height dimension thereof is relatively large, resulting in relatively low light transmittance of the first optical lens 211. Therefore, it is preferable that a glass material with higher light transmittance is used to reduce the influence of the thickness of the first optical lens 211 on the light transmittance.

Specifically, the molding principle of the molded glass is as follows: the glass blank with the initial shape is placed in a precision processing forming die, the temperature is raised to soften the glass, and then the surface of the die is pressed to deform the glass under stress, and the glass is taken out in a split mode, so that the required lens shape can be formed. Since the first optical lens 211 is an aspheric lens and the molded glass needs to be processed by pressing the glass with a mold, the damage to the mold caused by the biconcave lens made of the molded glass is large, and therefore, the upper surface of the first optical lens 211 is preferably a convex surface. Meanwhile, since the molded glass is manufactured by a molding die, a large inclination angle may exist between the sidewall of the convex portion 213 of the first optical lens 211 and the optical axis after the molded glass is molded, and at this time, the first optical lens 211 may be ground by a cold working technique, so that an included angle between the sidewall of the convex portion 213 of the first optical lens 211 and the optical axis is less than 15 °. Preferably, the side wall of the convex portion 213 of the first optical lens 211 forms an angle smaller than 10 ° with the optical axis. It is noted that, when the first optical lens 211 is implemented as a glass lens, the glass preferably has a refractive index of 1.48 to 1.55 and a refractive index abbe number of 50 to 71. Thus, the split lens 20 has high imaging quality (e.g., well controlling aberrations such as chromatic dispersion within a certain range). Meanwhile, the glass material can have better temperature drift.

In particular, in the embodiment of the present application, the first lens portion 21 is assembled to the second lens portion 22 by active alignment (AOA). Specifically, the assembling process first includes: picking up the first lens portion 21 and the second lens portion 22, respectively; then, the first lens section 21, the second lens section 22, and the photosensitive member 50 are pre-positioned in the optical axis direction; then, the relative positional relationship between the first lens portion 21 and the second lens portion 22 is adjusted in an active calibration manner; then, the first lens portion 21 is fixedly arranged on the second lens portion 22; then, the shielding member 30 is fitted to the side wall of the convex portion 213 of the first optical lens 211 of the first lens section 21.

It should be noted that, in other examples of the present application, the shielding element 30 may be sleeved on or assembled to the first lens portion 21 by an adhesive 40; further, the relative positional relationship between the first lens portion 21 and the shading member 30 and the second lens portion 22 is adjusted in an active calibration manner. And is not intended to limit the scope of the present application.

In the embodiment of the present application, adjusting the relative positional relationship between the first lens portion 21 and the second lens portion 22 in an active calibration manner includes:

the relative position relationship between the first lens part 21 and the second lens part 22 is adjusted based on the imaging quality of the image acquired by the imaging system formed by the first optical lens 211, the second lens part 22 and the photosensitive component 50.

Specifically, an image of a target to be measured is first acquired by the photosensitive element 50 in cooperation with the split-type lens 20, and then the molding quality and the adjustment amount of the split-type lens 20 are calculated by image imaging quality calculation methods such as SFR and MTF. Then, the relative positional relationship between the first lens portion 21 and the second lens portion 22 is adjusted in real time in at least one direction (at least one direction refers to the xyz direction and the directions of rotation about the xyz axis, respectively) according to the adjustment amount, so that the imaging quality (mainly including optical parameters such as peak value, curvature of field, astigmatism, etc.) of the split lens 20 reaches a preset threshold value after one or more adjustments.

In the embodiment of the present application, the process of fixing the first lens portion 21 to the second lens portion 22 to form the split type lens 20 includes: first applying an adhesive 40 between the first optical lens 211 and the second optical lens at the topmost side; further, the first lens portion 21 is fixedly attached to the second lens portion 22 by curing the adhesive 40 to fixedly attach the first optical lens 211 to the second optical lens at the topmost side. In particular, in the embodiment of the present application, the adhesive 40 may be cured by thermal curing or photo curing, that is, the adhesive 40 includes a photo-curing component or a thermal curing component.

It should be noted that, in the embodiment of the present application, the step of applying the adhesive 40 may also be performed after the active calibration, that is, after the imaging quality correction of the split lens 20 is completed, the first lens portion 21 is removed, and then the adhesive 40 is applied to the corresponding position of the second lens portion 22. And is not intended to limit the scope of the present application.

In other examples of the present application, the optical system of the split lens 20 can be configured in other manners, for example, the first lens portion 21 may include more optical lenses, and the second lens portion 22 may include fewer optical lenses. For example, the first lens portion 21 may include the first optical lens 211 and at least a portion of the second optical lens, the second lens portion 22 includes the other remaining second optical lenses, and the second optical lens at the topmost side is also exposed to the top of the second lens portion 22.

Also, in other examples of the present application, the split lens 20 further includes a greater number of lens portions. For example, the split lens 20 may include three lens portions: a first lens portion 21, a second lens portion 22, and a third lens portion (not shown), and the first lens portion 21, the second lens portion 22, and the third lens portion are assembled in an AOA manner to ensure assembly accuracy and yield.

In summary, the camera module, the split-type lens and the deformation thereof based on the embodiment of the present application are clarified, the size of the opening of the display screen is reduced by changing the optical design scheme of the camera module, and the stray light prevention performance of the camera module is reinforced by the shielding element, so as to improve the imaging quality. It should be noted that the split-type lens and the implementation variants thereof illustrated in the present application can be combined with each other to form a new implementation variant, which is not described herein again because it is a simple permutation and combination.

It should be understood that the shading element to which the present application relates is substantially different from the existing lens barrel. Specifically, the shielding element according to the present application is provided for the purpose of reducing stray light, and the conventional lens barrel is provided for the purpose of supporting the first optical lens; second, the shielding element of the present application is only circumferentially disposed on the sidewall of the protruding portion, and the conventional lens barrel covers the entire first optical lens. That is, there is also a significant difference in size between the two. Thirdly, in order to prevent stray light, the upper surface of the shielding element exceeds the height of the side wall of the protruding part, and the conventional lens barrel does not need to be designed to have the height at all. Fourth, in order to enhance the performance of preventing stray light, the shielding element is further optimized by providing an inclined surface, roughening the upper surface, and providing a light shielding layer, and the like, but the conventional lens barrel is not necessary at all and is not motivated to do so. Fifth, in order to be more adaptive to the first optical lens, the inner side surface of the shielding element is configured to be in a shape adaptive to the first optical lens, and the conventional lens barrel does not need to have any motivation at all. Of course, the shielding element and the conventional lens barrel have other slight differences, for example, an inward inclined surface is provided on the outer side surface of the shielding element, and the description thereof is omitted.

Exemplary terminal device

According to another aspect of the present application, a terminal device is also provided. Fig. 12 illustrates a schematic diagram of a terminal device according to an embodiment of the application. FIG. 13 illustrates a partial schematic diagram of the terminal device implemented in accordance with the present application. As shown in fig. 12 and 13, the terminal device 80 includes: the display screen 81 and the camera module 10 as described above, wherein the camera module 10 and the display screen 81 are installed on the same side to be configured as a front camera module 10 for realizing the functional requirements of a user, such as self-shooting. The display screen 81 may be implemented as an LCD or OLED display screen 81.

As shown in fig. 13, the display screen 81 has an opening 810 formed therethrough, wherein an inner diameter of the opening 810 is slightly larger than a lateral dimension of the protrusion 213. Here, the opening 810 of the display 81 is formed in a material that is not transparent to light in the display 81, wherein the top of the opening 810 is a cover plate layer (typically a glass cover plate) of the display 81. When the camera module 10 is assembled on the front side of the terminal device 100, the protrusion 213 of the first optical lens 211 of the split lens 20 is inserted into the opening 810. That is to say, in the embodiment of the present application, the split lens 20 is mounted on the terminal device 100 in such a manner that the first optical lens 211 is fitted in the opening 810 of the display screen 81, and in such a manner, the optical area of the first optical lens 211 can be closer to the top of the opening 810 to obtain a larger angle of view and a larger amount of light transmission, so as to ensure that the camera module 10 has a higher imaging quality. In particular, in the embodiment of the present application, when the lens 20 is assembled in the terminal device 100 in such a manner that the first optical lens 211 is fitted in the opening 810 of the display 81, the shielding element 30 disposed on the sidewall of the protrusion 213 is filled in the gap between the sidewall of the opening 810 of the display 81 of the terminal device 100 and the first optical lens 211, so as to reduce the external stray light entering the lens 20 through the gap between the sidewall of the opening 810 and the first optical lens 211.

In particular, in some embodiments of the present application, the outer side 32 of the shield element 30 has a shape that is adapted to the side wall of the aperture 810. Accordingly, when the camera module 10 is assembled to the terminal device 80, the outer side surface 32 of the shielding element 30 can be fittingly abutted against the hole wall of the display screen opening 810, so that on one hand, the installation coaxiality of the camera module 10 and the opening 810 of the display screen 81 can be improved, and on the other hand, the shielding element 30 can more fully fill the gap between the first optical lens 211 and the hole wall of the display screen opening 810, so as to achieve the effect of preventing stray light. Specifically, in the embodiment of the present application, the installation coaxiality of the camera module 10 and the display screen opening 810 is less than 0.012mm, even less than 0.006mm, through the shielding element 30.

In summary, the terminal device according to the embodiment of the present application is clarified, the size of the opening of the display screen is reduced by changing the optical design scheme of the camera module, so that the "screen occupation ratio" of the terminal device can be further improved, and the stray light prevention performance of the camera module is reinforced by the shielding element, so as to improve the imaging quality.

It will be understood by those skilled in the art that the embodiments of the present invention as described above and shown in the drawings are given by way of example only and are not limiting of the present invention. The objects of the present invention have been fully and effectively accomplished. The functional and structural principles of the present invention have been shown and described in the embodiments without departing from the principles, embodiments of the present invention may have any deformation or modification.

Claims

1. A split type lens, comprising:

2. The split type lens of claim 1, wherein the shielding member is circumferentially provided to the sidewall of the protrusion to cover at least a portion of the sidewall of the protrusion.

3. A split lens according to claim 2, wherein an upper surface of the shielding member exceeds a height of a side wall of the boss.

4. A split lens according to claim 3, wherein the shielding member further covers at least a part of a transition region between the side wall and the upper surface of the boss, the transition region having a length in a direction from the side wall of the boss toward the center of the boss of 0.03 to 0.05 mm.

5. The split type lens of claim 2, wherein the shielding member extends downward to a lower surface of the shielding member contacting an upper surface of the structure region to completely cover the sidewall of the protrusion.

6. A split lens according to any one of claims 2 to 5, wherein a portion of an inner side surface of the shielding member corresponding to the first optical lens has a shape adapted to the first optical lens so that the shielding member can be fittingly provided to a side wall of the convex portion.

7. The split lens of claim 4, wherein when the side wall of the boss is perpendicular to the upper surface of the structural region, the inner side surface of the shielding member comprises a vertical surface matching the side wall and an arc surface fitting the transition region.

8. The split lens according to claim 4, wherein when the side wall of the boss is inclined to the upper surface of the structure region, the inner side surface of the shielding member includes an inclined surface adapted to the side wall and an arc-shaped surface adapted to the transition region.

9. The lens assembly of claim 8, wherein the side wall of the protrusion forms an angle with an optical axis defined by the first optical lens, the angle being less than 15 °.

10. A split lens according to claim 7 or 8, wherein the shape of the outer side face of the shielding member is adapted to the shape of the side wall of the aperture.

11. The split lens of claim 8, wherein the outer side surface of the shielding member conforms to the shape of the inner side surface of the shielding member.

12. The split type lens of claim 6, wherein the shielding member includes an inclined surface in an outer side surface thereof, the inclined surface being inclined inward.

13. The split type lens of claim 6, wherein the shielding member has an inclined surface extending obliquely inward from a tip end of the shielding member toward an inner side surface of the shielding member.

14. The split type lens of claim 13, wherein the shielding member includes a light shielding layer formed on the inclined surface.

15. The split type lens of claim 13, wherein the inclined surface has roughness.

16. The split type lens of claim 6, wherein the shielding member includes a light shielding layer disposed on an upper surface of the shielding member.

17. The split type lens of claim 6, wherein an upper surface of the shielding member has roughness.

18. The split type lens of claim 2, wherein the first optical lens includes a light shielding layer provided on a side wall portion of the convex portion which is not covered by the shielding element.

19. The split-type lens of claim 6, wherein the shielding member is directly sleeved on the sidewall of the protrusion portion.

20. The split type lens of claim 6, wherein the shielding member is assembled to the sidewall of the protrusion portion by an adhesive.

21. A split lens according to claim 20, wherein the adhesive has a thickness of 0.02-0.05 mm.

22. The utility model provides a module of making a video recording which characterized in that includes:

a split type lens according to any one of claims 1 to 21; and

a photosensitive assembly;

23. A terminal device, comprising:

the module of making a video recording includes:

a split type lens according to any one of claims 1 to 21; and

the split type lens comprises a photosensitive assembly, a lens holder and a lens holder, wherein the split type lens is held in a photosensitive path of the photosensitive assembly; a display screen having an opening;

the camera module and the display screen are arranged on the same side of the terminal equipment to be configured as a front camera module, and when the camera module is assembled on the terminal equipment, the split type lens of the camera module is embedded in the opening.

24. Terminal device according to claim 23, wherein the outer side of the shielding element has a shape adapted to the side wall of the aperture.

25. A terminal device according to claim 24, wherein the outer side of the shield member includes an inclined face which is inclined inwardly.

26. The terminal device of claim 23, wherein an offset between a central axis of the split lens and a central axis of the aperture is less than 0.012 mm.