Split lens, camera module and terminal equipment

Abstract

The present application relates to a split lens, a camera module and a terminal device. The split lens includes: a first lens portion including a first optical lens and a second lens portion. The first optical lens includes a structural area and a raised portion extending protruding from the structural area, wherein at least a portion of the upper surface of the raised portion forms an optical area of ​​the first optical lens. The second lens portion includes a lens barrel and at least one second optical lens installed in the lens barrel, and the first lens portion is assembled to the second lens portion. The split lens further includes a shielding element arranged on the side wall of the raised portion, and when the split lens is assembled to the terminal device, the shielding element is arranged in the 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 lens through the gap between the side wall of the opening and the first optical lens.

Description

Technical Field

[0001] The present application relates to the field of camera modules, and more specifically to a split lens, a camera module and a terminal device. Background Art

[0002] With the popularization of mobile electronic devices, the relevant technologies of camera modules used in mobile electronic devices to help users obtain images (such as videos or images) have been rapidly developed and improved, and in recent years, camera modules have been widely used in many fields such as medical treatment, security, industrial production, etc.

[0003] In the field of consumer electronics (for example, in the field of smartphones), the front camera module is an indispensable component. The front camera module is set on the same side as the display screen of the terminal device to meet the needs of consumers such as selfies. However, the ever-increasing "screen-to-body ratio" has put forward higher and higher requirements on the structure and layout of the front camera module. In order to reduce the impact of the front camera module on improving the "screen-to-body ratio", different manufacturers have developed a variety of solutions from different angles.

[0004] One solution is to open a through hole on the display screen of the terminal device. Specifically, in order to hide the front camera module, 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 sensor devices in the U-shaped hole. However, since the front camera module is the largest in volume among the front sensors, a larger U-shaped hole is required, which has a greater impact on the "screen-to-body ratio". In order to reduce the impact of the opening on improving the "screen-to-body ratio", some manufacturers change the U-shaped hole to a water drop shape, but due to the structure of the front camera module itself and the limitations of the screen opening process, the opening cannot be made smaller. Some manufacturers choose to open circular or elliptical openings on LCD or OLED displays. On the one hand, the size of the opening is still large. On the other hand, the opening appears abrupt when the terminal device is displaying the screen, affecting the user experience.

[0005] Some manufacturers have also proposed a solution to directly place the camera module under the screen, where the front camera module is imaged through the screen. For example, some manufacturers choose to set a blind hole on the screen of the terminal device, and the front camera module is imaged through the blind hole, where the blind hole refers to removing the layers with low light transmittance and unnecessary layers in the area corresponding to the front camera module on the display screen to increase the light transmittance. Although this solution balances light transmittance and aesthetics, the light transmittance is still not high and cannot achieve good imaging quality.

[0006] Therefore, an improved structure and optical design of the front camera module is needed. Summary of the invention

[0007] The main purpose of the present application is to provide a split lens, a camera module and a terminal device, wherein the optical lens of the camera module adopts an optical design scheme with a small head to reduce the opening size of the display screen of the terminal device, and a shielding element is provided at the head of the optical lens, so that when the camera module is assembled in the terminal device, the shielding element is provided in the gap between the side wall of the opening and the optical lens, so as to reduce the external stray light that enters the camera module through the gap between the side wall of the opening and the optical lens. In this way, the opening size of the display screen is reduced by changing the optical design scheme of the camera module, and the anti-stray light performance of the camera module is enhanced by the shielding element to improve the imaging quality.

[0008] Another object of the present application is to provide a split lens, a camera module and a terminal device, wherein the optical lens is a split lens, and the first lens portion located at the top of the split lens adopts a "naked lens" optical design (that is, the first lens portion only includes a first optical lens), wherein the first optical lens includes a structural area and a raised portion extending protruding from the structural area to form an optical design of a small head. In this way, when the camera module is assembled in the terminal device, the raised portion of the first lens portion is embedded in the opening of the display screen to reduce the distance between the camera module and the upper end of the opening of the display screen, thereby increasing the effective field of view of the camera module and ensuring the amount of light collected by the camera module.

[0009] Another object of the present application is to provide a split lens, a camera module and a terminal device, wherein the shielding element is arranged on the raised portion of the first lens part, so that when the camera module is assembled in the terminal device, the shielding element fills the gap between the side wall of the opening and the raised portion, so as to reduce the external stray light entering the camera module through the gap between the side wall of the opening and the raised portion. In this way, while increasing the effective field angle of the camera module to ensure the light collection amount of the camera module, the anti-stray light performance of the camera module is improved by the shielding element.

[0010] Another object of the present application is to provide a split lens, a camera module and a terminal device, wherein the shielding element can improve the accuracy of assembling the split lens in the opening of the display screen to improve the installation coaxiality between the two.

[0011] Another object of the present application is to provide a split lens, a camera module and a terminal device, wherein the shielding element circumferentially shields at least a portion of the raised portion of the first optical lens, so that there is no need to provide a shading layer on the shielded portion of the raised portion, thereby reducing the processing difficulty and cost of the first optical lens.

[0012] Another object of the present application is to provide a split lens, a camera module and a terminal device, wherein the shielding element can effectively protect the first optical lens and reduce damage to the first optical lens caused by unnecessary impact of the terminal device.

[0013] Other advantages and features of the present application will become apparent from the following description, and may be achieved by the means and combinations particularly pointed out in the claims.

[0014] To achieve at least one of the above purposes or advantages, the present application provides a split lens, including:

[0015] A first lens portion including a first optical lens, the first optical lens including a structure area and a convex portion protrudingly extending from the structure area, wherein at least a portion of an upper surface of the convex portion forms an optical area of ​​the first optical lens; and

[0016] A second lens part, the second lens part includes a lens barrel and at least one second optical lens installed in the lens barrel, the first lens part is assembled to the second lens part, wherein the split lens further includes a shielding element arranged on the side wall of the protrusion, and when the split lens is assembled to the terminal device, the shielding element is arranged in the 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 lens through the gap between the side wall of the opening and the first optical lens.

[0017] In the split lens according to the present application, the shielding element is disposed around the side wall of the protruding portion to cover at least a portion of the side wall of the protruding portion.

[0018] In the split lens according to the present application, the upper surface of the shielding element exceeds the height of the side wall of the protrusion.

[0019] In the split lens according to the present application, the shielding element further covers at least a portion of a transition area between the side wall and the upper surface of the protrusion, and the length of the transition area in the direction from the side wall of the protrusion to the center of the protrusion is 0.03-0.05 mm.

[0020] In the split lens according to the present application, the shielding element extends downward until the lower surface of the shielding element contacts the upper surface of the structural area to completely cover the side wall of the protrusion.

[0021] In the split lens according to the present application, the portion of the inner side surface of the shielding element corresponding to the first optical lens has a shape adapted to the first optical lens, so that the shielding element can be adaptively arranged on the side wall of the protrusion.

[0022] In the split lens according to the present application, when the side wall of the protrusion is perpendicular to the upper surface of the structural area, the inner side surface of the shielding element includes a vertical surface matching the side wall and a curved surface matching the transition area.

[0023] In the split lens according to the present application, when the side wall of the protrusion is inclined to the upper surface of the structural area, the inner side surface of the shielding element includes an inclined surface adapted to the side wall and a curved surface adapted to the transition area.

[0024] In the split lens according to the present application, the angle formed between the side wall of the protrusion and the optical axis set by the first optical lens is less than 15°.

[0025] In the split lens according to the present application, the shape of the outer side surface of the shielding element is adapted to the shape of the side wall of the opening.

[0026] In the split lens according to the present application, the shape of the outer side surface of the shielding element is consistent with the shape of the inner side surface of the shielding element.

[0027] In the split lens according to the present application, the outer side surface of the shielding element includes an inclined surface inclined inwardly.

[0028] In the split lens according to the present application, the shielding element has an inclined surface extending inwardly from the top end of the shielding element toward the inner side surface of the shielding element.

[0029] In the split lens according to the present application, the shielding element includes a light shielding layer formed on the inclined surface.

[0030] In the split lens according to the present application, the inclined surface has a certain degree of roughness.

[0031] In the split lens according to the present application, the shielding element includes a light shielding layer disposed on the upper surface of the shielding element.

[0032] In the split lens according to the present application, the upper surface of the shielding element has a certain degree of roughness.

[0033] In the split lens according to the present application, the first optical lens includes a light shielding layer disposed on a side wall portion of the protruding portion that is not covered by the shielding element.

[0034] In the split lens according to the present application, the shielding element is directly sleeved on the side wall of the protruding portion.

[0035] In the split lens according to the present application, the shielding element is assembled to the side wall of the protruding portion by an adhesive.

[0036] In the split lens according to the present application, the thickness of the adhesive is 0.02-0.05 mm.

[0037] According to another aspect of the present application, the present application also provides a camera module, including:

[0038] A split lens as described above; and

[0039] A photosensitive component, wherein the split lens is maintained on the photosensitive path of the photosensitive component.

[0040] In the camera module according to the present application, the camera module further includes a driving element, wherein the driving element is installed on the photosensitive component, and the optical lens is installed on the driving element.

[0041] According to another aspect of the present application, a terminal device is also provided, including:

[0042] A camera module, comprising: the split lens as described above; and a photosensitive component, wherein the split lens is maintained on the photosensitive path of the photosensitive component; and

[0043] A display screen with an opening, wherein the camera module and the display screen are installed on the same side of the terminal device to be configured as a front camera module, wherein when the camera module is assembled to the terminal device, the split lens of the camera module is embedded in the opening.

[0044] In the terminal device according to the present application, the outer side surface of the shielding element has a shape matched with the side wall of the opening.

[0045] In the terminal device according to the present application, the outer side surface of the shielding element includes an inclined surface inclined inwardly.

[0046] In the terminal device according to the present application, the offset between the central axis of the split lens and the central axis of the opening is less than 0.012.

[0047] Further objectives and advantages of the present application will be fully reflected through understanding of the following description and drawings.

[0048] These and other objects, features and advantages of the present application are fully reflected in the following detailed description, drawings and claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] By describing the embodiments of the present application in more detail in conjunction with the accompanying drawings, the above and other purposes, features and advantages of the present application will become more apparent. The accompanying drawings are used to provide a further understanding of the embodiments of the present application and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the present application and do not constitute a limitation of the present application. In the accompanying drawings, the same reference numerals generally represent the same components or steps.

[0050] Figure 1 The figure shows a schematic diagram of an existing camera module assembled in a terminal device.

[0051] Figure 2 The figure shows a schematic diagram after the optical design of the existing camera module is improved.

[0052] Figure 3 The figure shows a schematic diagram of the relative position relationship between the first lens part of the improved camera module and the opening of the display screen.

[0053] Figure 4 A schematic diagram of a camera module according to an embodiment of the present application is illustrated.

[0054] Figure 5 The figure shows a schematic diagram of the camera module assembled in a terminal device according to an embodiment of the present application.

[0055] Figure 6 The figure shows a schematic diagram of the split lens in the camera module according to an embodiment of the present application being embedded in the opening of the display screen.

[0056] Figure 7 The figure shows a partial schematic diagram of a split lens embedded in an opening of a display screen according to a modified implementation of an embodiment of the present application.

[0057] Figure 8 The figure shows a partial schematic diagram of a split lens embedded in an opening of a display screen according to another variant implementation of the embodiment of the present application.

[0058] Fig. 9 The figure shows a partial schematic diagram of a split lens embedded in an opening of a display screen according to another variant implementation of the embodiment of the present application.

[0059] Fig.10 The figure shows a partial schematic diagram of a split lens embedded in an opening of a display screen according to another variant implementation of the embodiment of the present application.

[0060] Fig.11 The figure shows a partial schematic diagram of a split lens embedded in an opening of a display screen according to another variant implementation of the embodiment of the present application.

[0061] Fig.12 A schematic diagram of a terminal device according to an embodiment of the present application is illustrated.

[0062] Fig.13 The figure shows a partial schematic diagram of the terminal device implemented according to the present application. DETAILED DESCRIPTION

[0063] Below, the exemplary embodiments according to the present application will be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application, and it should be understood that the present application is not limited to the exemplary embodiments described here.

[0064] Application Overview

[0065] As mentioned above, in order to reduce the impact of the front camera module on improving the "screen-to-body ratio", different manufacturers have developed a variety of 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-to-body ratio" and ensuring the imaging quality of the front camera module.

[0066] Specifically, the existing front camera module usually includes a photosensitive component for photosensitive imaging and an optical lens held on the photosensitive path of the photosensitive component. According to the structure, the optical lens includes an integrated lens and a split lens. Figure 1 The figure shows a schematic diagram of an existing camera module assembled in a terminal device. Figure 1 As shown, the camera module includes a split lens and a photosensitive component, and the split lens includes a first lens part 11 and a second lens part 12, wherein the first lens part 11 includes a first optical lens 111 and a first lens barrel 112 for mounting the first optical lens 111, and the second lens part 12 includes at least one second optical lens 121 and a second lens barrel 122 for accommodating at least one optical lens 121. When the camera module is assembled in the terminal device, from the perspective of size, the head size of the existing camera module is more than 3mm. In order to match the head size of the camera module, the size of the screen opening 3 needs to be large enough. After the camera module is placed on the screen, considering the field of view of the camera module (the side wall of the screen opening 3 will affect 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 4.5mm or more. The screen opening 3 of such a size leads to poor display effect of the screen, and the screen opening 3 appears very abrupt when the terminal device performs screen display, affecting the user experience.

[0067] In order to reduce the size of the display opening, the inventor of this application proposed a "small head" optical design solution. Specifically, Figure 2The figure shows a schematic diagram of the optical design improvement of the existing camera module. Figure 2 As shown, in the improved split lens, the first lens portion 11 adopts a bare lens optical design, that is, the first lens portion 11 only includes a first optical lens 111. In addition, the first optical lens 111 includes a structural area 113 and a protruding portion 114 protrudingly extending from the structural area 113 to form an optical design of a small head.

[0068] Figure 3 The figure shows 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. Figure 3 As shown, when the camera module is assembled in the terminal device, the protrusion 114 of the first lens part 11 is embedded in the display screen opening 3 to reduce the distance between the camera module and the upper end of the display screen opening 3, thereby increasing the effective field of view of the camera module and increasing the amount of light collected by the camera module.

[0069] However, since the improved camera module directly embeds the first optical lens 111 into the display screen opening 3, on the one hand, in consideration of the field of view requirements of the camera module, the display screen opening 3 needs to meet a certain aperture size (tested that the size of the display screen opening 3 is not greater than 3.0 mm), and on the other hand, considering that there is an assembly eccentricity tolerance between the display screen opening 3 and the first optical lens 111, a certain eccentricity tolerance space needs to be reserved and a certain gap needs to be reserved between the top of the protrusion 114 and the top cover plate of the display screen opening 3 (usually the cover plate of the display screen does not have an opening) (usually, the gap is not less than 0.15 mm). Figure 3 As shown, the final result is that a certain gap D needs to be reserved between the side wall of the display screen opening 3 and the raised portion 114 of the first optical lens 111. Due to the existence of the gap D, some stray light is generated, and the reason is that: even if a light shielding layer (for example, an ink layer) is set in other areas of the first optical lens 111 except the optical area, there will still be a part of the light projected on the side wall of the display screen opening 3, which will enter the optical area of ​​the first optical lens 111 after being reflected by the side wall of the opening 3 to participate in imaging, wherein this part of the light will carry other information after being reflected by the mirror, thereby causing adverse effects on the imaging quality of the camera module.

[0070] Based on this improvement idea, the basic concept of the present application is to set a shielding element at the head of the split optical lens, so that when the camera module is assembled in the terminal device, the shielding element is set in the gap between the side wall of the opening and the optical lens, so as to reduce the external stray light entering the camera module through the gap between the side wall of the opening and the optical lens.

[0071] Based on this, the present application proposes a split lens, which includes: a first lens part including a first optical lens and a second lens part, wherein the first optical lens includes a structural area and a raised portion extending protruding from the structural area, wherein at least a portion of the upper surface of the raised portion forms an optical area of ​​the first optical lens; the second lens part includes a lens barrel and at least one second optical lens installed in the lens barrel, and the first lens part is assembled to the second lens part. In particular, the split lens further includes a shielding element arranged on the side wall of the raised portion, and when the split lens is assembled in a terminal device, the shielding element is arranged in the 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 the external stray light entering the split lens through the gap between the side wall of the opening and the first optical lens. In this way, the opening size of the display screen is reduced by changing the optical design of the camera module, and the anti-stray light performance of the camera module is enhanced by the shielding element to improve the imaging quality. In addition, the shielding element can also play a positioning role during the process of assembling the camera module to the opening of the display screen to reduce assembly tolerance.

[0072] After introducing the basic principles of the present application, various non-limiting embodiments of the present application will be described in detail with reference to the accompanying drawings.

[0073] Exemplary camera module and split lens thereof

[0074] like Figures 4 to 6 As shown, a camera module 10 based on an embodiment of the present application is illustrated, wherein the camera module 10 is configured as a front camera module 10 of a terminal device, for satisfying the user's needs for selfies, etc. In the embodiment of the present application, the terminal device includes but is not limited to a smartphone, a tablet computer, a wearable device, etc.

[0075] In the embodiment of the present application, the camera module 10 includes a split lens 20 and a photosensitive component 50, and the split lens 20 is maintained in the photosensitive path of the photosensitive component 50, so that the light collected by the optical lens can be imaged in the photosensitive component 50 along the photosensitive path. In particular, in the embodiment of the present application, the split lens 20 includes at least two lens parts; the photosensitive component 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 body 54 disposed on the circuit board 51, wherein the split lens 20 is mounted on the package body 54.

[0076] It should be noted that if Figure 4The camera module 10 shown is a fixed-focus camera module. Those skilled in the art should know that the camera module 10 involved in the present application can also be implemented as a dynamic-focus camera module, that is, the camera module 10 also includes a driving element (not shown in the figure) disposed between the split lens 20 and the photosensitive component 50, so that the split lens 20 is carried by the driving element to move along the photosensitive path to change the distance between the split lens 20 and the photosensitive component 50. Of course, the camera module 10 involved in the present application can also be implemented as an optical image stabilization camera module, that is, the camera module 10 also includes an anti-shake motor (not shown in the figure) disposed between the split lens 20 and the photosensitive component 50, so that the anti-shake motor can eliminate the influence of image quality caused by inadvertent shaking during shooting.

[0077] like Figure 4 As shown, in the embodiment of the present application, the split lens 20 includes two lens parts: a first lens part 21 and a second lens part 22, wherein the first lens part 21 includes a first optical lens 211, and the second lens part 22 includes 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 part 21 only includes the first optical lens 211, that is, the first lens part 21 is a "naked lens" and does not include a lens barrel for supporting the first optical lens 211. During the assembly process, the first optical lens 211 can be assembled to the second lens part 22 in a manner of being bonded to the second optical lens 221 located at the top side of the second lens part 22 by an adhesive. Of course, in other examples of the present application, the first optical lens 211 can also be assembled to the second lens portion 22 in other ways. For example, the first optical lens 211 can be assembled to the second lens portion 22 by being bonded to the second optical lens 221 located at the top side and the lens barrel 222 at the same time by an adhesive; for another example, the first optical lens 211 can be assembled to the second lens portion 22 by being bonded to the lens barrel 222 of the second lens portion 22 by an adhesive, which is not limited to the present application.

[0078] In particular, in the embodiment of the present application, the split lens 20 has a "small head" structure. Figure 4As shown, in the implementation of the present application, the first optical lens 211 includes a structural area 212 and a protruding portion 213 extending upward from the upper surface of the structural area 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 0.5 mm, and the width does not exceed 2.0 mm (preferably, the width of the protruding portion does not exceed 1.5 mm), 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 structural area 212, and the width of the protruding portion 213 represents the maximum lateral dimension of the protruding portion 213. In addition, in the embodiment of the present application, the optical zone of the first optical lens 211 is formed on the upper surface of the protruding portion 213, that is, in the embodiment of the present application, at least a portion of the upper surface of the protruding portion 213 forms the optical zone of the first optical lens 211 to allow external light to enter the split lens 20 through the optical zone. In contrast, the area of ​​the first optical lens 211 other than the optical zone is a non-optical zone of the first optical lens 211 , where the non-optical zone refers to a portion of the first optical lens 211 that does not participate in light transmission imaging.

[0079] It should be understood that when having the "small head" structure as described above, 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 more deeply embedded in the opening 810 of the display screen 81 of the terminal device, so that the optical zone of the first optical lens 211 can be closer to the top of the opening 810, so as to obtain a larger field of view angle and light transmittance. However, if the first optical lens 211 is directly embedded in the opening 810 of the display screen 81, on the one hand, in consideration of the field of view of the camera module 10, the opening 810 of the display screen 81 needs to meet a certain aperture size (tested that the aperture size of the display screen 81 is not greater than 2.0 mm); on the other hand, considering that there is an assembly eccentricity tolerance between the opening 810 of the display screen 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 0.15 mm) needs to be reserved between the top of the protrusion 213 and the top cover plate of the opening 810 of the display screen 81 (usually the cover plate of the display screen 81 does not have a hole). If so, the final result is that a certain gap D needs to be reserved between the side wall of the opening 810 of the display screen 81 and the protrusion 213 of the first optical lens 211. Due to the existence of the gap D, even if a light shielding layer (e.g., ink layer) is provided in other areas of the first optical lens 211 except the optical area, a portion of the light irradiated on the side wall of the opening 810 of the display screen 81 will still enter the optical area of ​​the first optical lens 211 after being reflected by the side wall of the opening 810 to participate in imaging, wherein this portion of light will carry other information after reflection, thereby causing adverse effects on the imaging quality of the camera module 10. In other words, due to the existence of the gap D, stray light will be generated, affecting the imaging quality.

[0080] In order to solve the above technical problems, in the embodiment of the present application, the split lens 20 further includes a shielding element 30 arranged on the side wall of the protrusion 213, so that when the split lens 20 is assembled in the terminal device, the shielding element 30 fills the gap between the side wall of the opening 810 of the display screen 81 of the terminal device and the first optical lens 211, so as to reduce the external stray light entering the split lens 20 through the gap between the side wall of the opening 810 and the first optical lens 211, such as Figure 5 shown.

[0081] Specifically, if Figure 4As shown, in the embodiment of the present application, the shielding element 30 is disposed around the side wall of the protrusion 213 to cover at least a portion of the side wall of the protrusion 213. That is, in the embodiment of the present application, the shielding element 30 has an annular structure to cover at least a portion of the side wall of the protrusion 213. In addition, the shielding element 30 has a light absorbing function. Figure 6 As shown, when the split lens 20 is assembled in the terminal device, the light irradiated on the side wall of the opening 810 of the display screen 81 is reflected to the shading element and then absorbed by the shading element. In this way, the external stray light entering the split lens 20 through the gap between the side wall of the opening 810 and the first optical lens 211 is reduced. In a specific implementation, the shielding element 30 can be made of a light-absorbing material, or a light-shielding layer is provided on the outer surface of the shielding element 30 so that the shielding element 30 has a light-absorbing function, which is not limited to the present application.

[0082] Furthermore, if Figure 6 As shown, in the embodiment of the present application, the upper surface of the shielding element 30 exceeds the height of the side wall of the protrusion 213, that is, the top of the shielding element 30 is higher than the highest point of the side wall of the protrusion 213, so that the shielding element 30 can cover the optical zone formed on the upper surface of the protrusion 213 to the greatest extent, so as to prevent external stray light from entering the optical zone after being reflected at the side wall of the opening 810 of the display screen 81.

[0083] Preferably, in the embodiment of the present application, the shielding element 30 further covers at least a portion of the transition area between the side wall of the protrusion 213 and its upper surface, wherein the length of the transition area in the direction from the side wall 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 area between the side wall of the protrusion 213 and its upper surface, which is not limited by the present application. Moreover, 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 area 212 to completely cover the side wall of the protrusion 213.

[0084] Of course, in the embodiment of the present application, the length of the shielding element 30 extending downward is not limited by the present application. For example, in other examples of the present application, the shielding element 30 extends downward but does not contact the upper surface of the structural area 212 (that is, the upper part of the side wall of the protrusion 213 is covered by the shielding element 30, and the lower part is exposed). Fig. 9Those skilled in the art should know that in the embodiment of the present application, the height setting of the shielding element 30 should be based on meeting the field of view angle requirement and not generating stray light or generating minimal stray light, and the specific selected value is not limited by the present application.

[0085] Furthermore, if Figure 5 and Figure 6 As shown, in the embodiment of the present application, the portion of the inner side surface 31 of the shielding element 30 corresponding to the first optical lens 211 has a shape adapted to the first optical lens 211 so that the shielding element 30 can be adaptively arranged on the side wall of the protrusion 213.

[0086] Specifically, in Figure 4 In the split lens 20 shown, the side wall of the protrusion 213 is perpendicular to the upper surface of the structural area 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 protrusion 213, the inner side surface 31 of the shielding element 30 includes a vertical surface matching the side wall and an arc surface matching the transition area, so that the shielding element 30 can be adaptively sleeved on the side wall of the protrusion 213 to protect the protrusion 213 therein.

[0087] It is worth mentioning that in other examples of the present application, the side wall of the protrusion 213 can also be implemented in other shapes. Fig.10 In the illustrated deformation implementation of the split lens 20, the side wall of the protrusion 213 is inclined to the upper surface of the structural area 212. Accordingly, in order to adapt to the shape configuration of the protrusion 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 area, so that the shielding element 30 can be adaptively sleeved on the side wall of the protrusion 213 to protect the protrusion 213 therein. Of course, in other examples of the present application, the side wall of the protrusion 213 can also be configured into other shapes (for example, stepped, etc.), and accordingly, the inner side surface 31 of the shielding element 30 also needs to be adjusted to match, which will not be described in detail.

[0088] It is worth mentioning that when the side wall of the protrusion 213 is inclined to the upper surface of the structural area 212, preferably, the angle range between the side wall of the protrusion 213 and the optical axis set by the first optical lens 211 is less than 15°. In addition, when the side wall of the protrusion 213 is inclined to the upper surface of the structural area 212, the eccentricity tolerance of not less than 0.1 between the camera module 10 and the terminal device when the camera module 10 is assembled in the terminal device can be reduced, and the size of the opening 810 of the display screen 81 can be reduced.

[0089] Furthermore, if Figure 5 and Figure 6 As shown, in the embodiment of the present application, the shape of the outer side surface 32 of the shielding element 30 is adapted to the shape of the side wall of the opening 810. Those skilled in the art should know that the opening 810 of the display screen 81 is usually a cylindrical hole. 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 to the terminal device, the outer side surface 32 of the shielding element 30 can be adaptively attached to the hole wall of the opening 810 of the display screen 81, so that, on the 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 opening 810 of the display screen 81 to achieve the effect of preventing stray light. Specifically, in the embodiment of the present application, through the shielding element 30, the installation coaxiality between the camera module 10 and the opening 810 of the display screen 81 is less than 0.012 mm, and even reaches less than 0.006 mm.

[0090] Fig.11 FIG. 1 is a schematic diagram showing another variant implementation of the split lens 20 according to an embodiment of the present application, wherein Fig.11 The split lens 20 shown is Fig.10 The illustrated embodiment of the split lens 20 is a modified embodiment. Fig.10 As shown, in this modified implementation, the side wall of the protrusion 213 is inclined to the upper surface of the structural area 212, and at the same time, the shape of the outer side surface 32 of the shielding element 30 is adapted to the shape of the side wall of the opening 810, that is, the outer side surface 32 of the shielding element 30 is configured as a cylindrical surface.

[0091] Of course, in other examples of the present application, the outer side surface 32 of the shielding element 30 may also be configured in other shapes, which is not limited by the present application. Fig.10 In the illustrated variant of the split lens 20, the outer side surface 32 of the shielding element 30 is consistent in shape with the inner side surface 31 of the shielding element 30, so that the shielding element 30 has a consistent structure. Fig.10 As shown, the outer side surface 32 of the shielding element 30 and the inner side surface of the shielding element 30 are both inclined surfaces 31 .

[0092] In order to enhance the effect of preventing stray light, preferably, in the embodiment of the present application, the shielding element 30 has an inclined surface 33 extending inwardly from the top of the shielding element 30 to the inner side surface 31 of the shielding element 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 the generation of stray light; for another example, a light shielding layer may be provided on the inclined surface 33 to absorb stray light irradiated on 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.

[0093] It is worth mentioning that in other examples of the present application, it is also possible not to set an inclined surface between the top of the shielding element 30 and the inner side surface 31 of the shielding element 30. Figure 8 As shown, this is not limited to the present application.

[0094] Figure 7 FIG. 2 is a schematic diagram showing another variant implementation of the split lens 20 according to an embodiment of the present application. Figure 7 As shown, in this modified implementation, in order to further enhance the effect of preventing stray light, an inwardly inclined inclined surface 34 is provided on the outer side surface 32 of the shielding element 30, so that the light reflected from the side wall of the opening 810 of the display screen 81 can be 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 element 30, and the bonding space between the first optical lens 211 and the side wall of the opening 810 of the display screen 81 can also be increased.

[0095] It is worth mentioning that, in the embodiment of the present application, since the shielding element 30 covers at least a portion of the side wall of the protrusion 213 and the shielding element 30 has a light absorbing effect, in the embodiment of the present application, the portion of the side wall of the protrusion 213 covered by the shielding element 30 may not be provided with a light shielding layer. That is to say, in the embodiment of the present application, the shielding element 30 surrounds at least a portion of the protrusion 213 of the first optical lens 211, so that it is not necessary to provide a light shielding layer on the shielded portion of the protrusion 213, so as to reduce the processing difficulty and processing cost of the first optical lens 211. In addition, since it is not necessary to provide a light shielding layer on the shielded portion of the protrusion 213, the light shielding element cooperates with the side wall of the first optical lens 211, and the assembly accuracy between the two can be improved.

[0096] Specifically, in Figure 4In the split lens 20 shown in the figure, the shielding element 30 extends downward until the lower surface of the shielding element 30 contacts the upper surface of the structural area 212 to completely cover the side wall of the protrusion 213; at the same time, the shielding element 30 extends upward to cover at least a portion of the transition area between the side wall and the upper surface of the protrusion 213. Accordingly, there is no need to provide a light-shielding layer on the entire side wall of the protrusion 213 and the portion covered by the shielding element 30 in the transition area between the side wall and the upper surface of the protrusion 213, so as to reduce the processing difficulty and processing cost of the first optical lens 211. For another example, in Fig. 9 In the split lens 20 shown in the figure, the shielding element 30 extends downward but does not extend to contact the upper surface of the structural area 212 to partially cover the side wall of the protrusion 213; at the same time, the shielding element 30 extends upward to cover at least a portion of the transition area between the side wall and the upper surface of the protrusion 213. Accordingly, there is no need to provide a light shielding layer on the portion of the side wall of the protrusion 213 covered by the shielding element 30 and the portion of the transition area between the side wall and the upper surface of the protrusion 213 covered by the shielding element 30, and a light shielding layer 214 is provided on the portion of the side wall of the protrusion 213 not covered by the shielding element 30. That is to say, in the Fig. 9 In the split lens 20 shown, the light shielding layer 214 disposed on the protruding portion 213 and the shielding element 30 together constitute the anti-stray light system of the split lens 20 .

[0097] It is also worth mentioning that in the embodiment of the present application, the shielding element 30 can be directly sleeved on the side wall of the protrusion 213. Accordingly, the inner diameter of the shielding element 30 is slightly larger than the transverse 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 side wall of the protrusion 213 through the adhesive 40. Accordingly, the adhesive 40 is applied between the side wall of the protrusion 213 and the inner side surface of the shielding element 30, wherein the thickness of the adhesive 40 ranges from 0.02 mm to 0.05 mm.

[0098] 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 molded by plastic injection and cut and polished into the desired shape. Of course, in other examples of the present application, the first optical lens 211 can also be implemented as a glass lens, which can be prepared by a molded glass process and cut or polished into the desired shape. In particular, in the embodiment of the present application, the first optical lens 211 has a "small head" structure, and its overall height dimension is relatively large, resulting in a relatively low light transmittance of the first optical lens 211. Therefore, preferably, the use of a glass material with a higher light transmittance can reduce the effect of the larger thickness of the first optical lens 211 on the light transmittance.

[0099] Specifically, the molding principle of molded glass is: placing the glass embryo with a preliminary shape in a precision-machined molding mold, raising the temperature to soften the glass, and then applying pressure on the mold surface to deform the glass and remove it from the mold, so as to form the required lens shape. Since the first optical lens 211 is an aspheric lens, and molded glass needs to be processed by applying pressure to the glass using a mold, the molded glass manufacturing of a double concave lens will cause greater damage to the mold, so the upper surface of the first optical lens 211 is preferably a convex surface. At the same time, since molded glass is manufactured by a molding mold, there may be a large inclination angle between the side wall of the raised portion 213 of the first optical lens 211 after the molded glass is molded and the optical axis. At this time, the first optical lens 211 can be ground by cold processing technology so that the angle between the side wall of the raised portion 213 of the first optical lens 211 and the optical axis is less than 15°. Preferably, the angle between the side wall of the raised portion 213 of the first optical lens 211 and the optical axis is less than 10°. It is worth mentioning that when the first optical lens 211 is implemented as a glass lens, the refractive index of the glass is preferably 1.48-1.55, and its refractive index Abbe number is preferably 50-71. In this way, the split lens 20 has a higher imaging quality (for example, aberrations such as dispersion are well controlled within a certain range). At the same time, the selection of glass material can have a better temperature drift.

[0100] In particular, in the embodiment of the present application, the first lens part 21 is assembled to the second lens part 22 by active optical alignment (AOA). Specifically, the assembly process first includes: picking up the first lens part 21 and the second lens part 22 respectively; then, pre-positioning the first lens part 21, the second lens part 22 and the photosensitive component 50 along the optical axis direction; then, adjusting the relative position relationship between the first lens part 21 and the second lens part 22 by active calibration; then, fixing the first lens part 21 to the second lens part 22; then, sleeve the shielding element 30 on the side wall of the raised portion 213 of the first optical lens 211 of the first lens part 21.

[0101] It is worth mentioning that in other examples of the present application, the shielding element 30 may be firstly sleeved or assembled to the first lens portion 21 through the adhesive 40, and then the relative positional relationship between the first lens portion 21, the shielding element 30 and the second lens portion 22 may be adjusted in an active calibration manner. This is not limited to the present application.

[0102] In the embodiment of the present application, the relative position relationship between the first lens portion 21 and the second lens portion 22 is adjusted in an active calibration manner, including:

[0103] Based on the imaging quality of the image captured by the imaging system composed of the first optical lens 211, the second lens part 22 and the photosensitive component 50, the relative position relationship between the first lens part 21 and the second lens part 22 is adjusted.

[0104] Specifically, firstly, the image of the measured target is acquired by the photosensitive component 50 in cooperation with the split lens 20, and then, the forming quality and adjustment amount of the split lens 20 are calculated by the image imaging quality calculation method such as SFR and MTF. Then, the relative position relationship between the first lens part 21 and the second lens part 22 is adjusted in real time in at least one direction (at least one direction refers to the xyz direction and the direction of rotation around the xyz axis respectively) according to the adjustment amount, so that the imaging quality (mainly including optical parameters such as peak value, field curvature, astigmatism, etc.) of the split lens 20 reaches a preset threshold after one or more adjustments.

[0105] 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 lens 20 includes: firstly applying an adhesive 40 between the first optical lens 211 and the second optical lens at the top; then, curing the adhesive 40 to fix the first optical lens 211 to the second optical lens at the top, thereby fixing the first lens portion 21 to the second lens portion 22. In particular, in the embodiment of the present application, the adhesive 40 can be cured by heat curing or light curing, that is, the adhesive 40 contains a light curing component or a heat curing component.

[0106] It is worth mentioning that in the embodiment of the present application, the step of applying the adhesive 40 can also be performed after active calibration, that is, after completing the imaging quality calibration of the split lens 20, the first lens part 21 is removed, and then the adhesive 40 is applied to the corresponding position of the second lens part 22. This is not limited to the present application.

[0107] In other examples of the present application, the optical system of the split lens 20 can also be configured in other ways, 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 part of the second optical lens, the second lens portion 22 may include other remaining second optical lenses, and the second optical lens at the top side is also exposed at the top of the second lens portion 22.

[0108] Furthermore, in other examples of the present application, the split lens 20 further includes a greater number of lens parts. For example, the split lens 20 may include three lens parts: a first lens part 21, a second lens part 22, and a third lens part (not shown in the figure), and the first lens part 21, the second lens part 22, and the third lens part are assembled in an AOA manner to ensure assembly accuracy and yield.

[0109] In summary, the camera module, split lens and its deformation implementation based on the embodiment of the present application are explained, which reduces the opening size of the display screen by changing the optical design of the camera module, and enhances the anti-stray light performance of the camera module through the shielding element to improve the imaging quality. It is worth mentioning that the split lens and its deformation implementation shown in the present application can be combined with each other to form a new deformation implementation. Since it is a simple arrangement and combination, it will not be repeated here.

[0110] It should be understood that the shielding element involved in the present application is essentially different from the existing lens barrel. Specifically, first, the shielding element involved in the present application is provided for the purpose of reducing stray light, while the existing lens barrel exists for the purpose of supporting the first optical lens; second, the shielding element involved in the present application is structurally only arranged around the side wall of the protrusion, while the existing lens barrel covers the entire first optical lens. In other words, there are also obvious differences in size between the two. Third, in order to prevent stray light, the upper surface of the shielding element will exceed the height of the side wall of the protrusion, while the existing lens barrel has no need and no motivation to make this height design. Fourth, in order to enhance the performance of preventing stray light, the shielding element will be further provided with an inclined surface, its upper surface will be roughened, and a light shielding layer will be provided, while the existing lens barrel has no need and no motivation to make these optimizations. Fifth, in order to better match the first optical lens, the inner side surface of the shielding element is configured to be a shape that matches the first optical lens, while the existing lens barrel has no need and no motivation to make this consideration. Of course, there are other subtle differences between the shielding element and the existing lens barrel, for example, the outer side surface of the shielding element is provided with an inwardly inclined surface, etc., which will not be elaborated.

[0111] Schematic terminal equipment

[0112] According to another aspect of the present application, a terminal device is also provided. Fig.12 A schematic diagram of a terminal device according to an embodiment of the present application is illustrated. Fig.13 FIG. 1 is a partial schematic diagram of the terminal device implemented according to the present application. Fig.12 and 13 As shown, the terminal device 80 includes: a 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 user's selfie and other functional requirements. The display screen 81 can be implemented as an LCD or OLED display screen 81.

[0113] like Fig.13As shown, the display screen 81 has an opening 810 formed therein through, wherein the inner diameter of the opening 810 is slightly larger than the lateral dimension of the protrusion 213. Here, the opening 810 of the display screen 81 is formed in the opaque material in the display screen 81, wherein the top of the opening 810 is the cover layer (usually a glass cover) of the display screen 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 embedded in the opening 810. That is to say, in the embodiment of the present application, the split lens 20 is assembled on the terminal device 100 in a manner that the first optical lens 211 is embedded in the opening 810 of the display screen 81. In this way, the optical zone of the first optical lens 211 can be closer to the top of the opening 810 to obtain a larger field of view angle and light transmittance, thereby ensuring that the camera module 10 has a higher imaging quality. And, in particular, in the embodiment of the present application, when the split lens 20 is assembled on the terminal device 100 in a manner that the first optical lens 211 is embedded in the opening 810 of the display screen 81, the shielding element 30 arranged on the side wall of the protrusion 213 fills the gap between the side wall of the opening 810 of the display screen 81 of the terminal device 100 and the first optical lens 211, so as to reduce external stray light entering the split lens 20 through the gap between the side wall of the opening 810 and the first optical lens 211.

[0114] In particular, in some embodiments of the present application, the outer side surface 32 of the shielding element 30 has a shape that is compatible with the side wall of the opening 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 adaptively attached to the hole wall of the display screen opening 810. In this way, on the one hand, the installation coaxiality between 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 to achieve the effect of preventing stray light. Specifically, in the embodiments of the present application, through the shielding element 30, the installation coaxiality between the camera module 10 and the display screen opening 810 is less than 0.012mm, and even reaches less than 0.006mm.

[0115] In summary, the terminal device based on the embodiment of the present application is explained, which reduces the opening size of the display screen by changing the optical design scheme of the camera module so that the "screen-to-body ratio" of the terminal device can be further improved, and the anti-stray light performance of the camera module is enhanced by the shielding element to improve the imaging quality.

[0116] It should be understood by those skilled in the art that the embodiments of the present invention described above and shown in the accompanying drawings are only examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functional and structural principles of the present invention have been demonstrated and explained in the embodiments, and the embodiments of the present invention may be deformed or modified in any way without departing from the principles.

Claims

1. A split lens, characterized in that: include: a first lens portion, the first lens portion only comprising a first optical lens and excluding a lens barrel for supporting the first optical lens, the first optical lens comprising a structural area and a convex portion protrudingly extending from the structural area, wherein at least a portion of an upper surface of the convex portion forms an optical area of ​​the first optical lens; and a second lens portion, the second lens portion comprising a lens barrel and at least one second optical lens installed in the lens barrel, the first lens portion being assembled to the second lens portion, wherein the split lens further comprises a shielding element arranged on the side wall of the protruding portion, and when the split lens is assembled to a terminal device, the shielding element is arranged in a gap between the side wall 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 lens through the gap between the side wall of the opening and the first optical lens; The shielding element is disposed around the side wall of the protrusion to cover at least a portion of the side wall of the protrusion; the shielding element extends downward but does not extend to contact the upper surface of the structural area to partially cover the side wall of the protrusion.

2. The split lens according to claim 1, wherein: The upper surface of the shielding element exceeds the height of the side wall of the protrusion.

3. The split lens according to claim 2, wherein: The shielding element further covers at least a portion of a transition region between the side wall and the upper surface of the protrusion, and a length of the transition region in a direction from the side wall of the protrusion to the center of the protrusion is 0.03-0.05 mm.

4. The split lens according to claim 1, wherein: The portion of the inner side surface of the shielding element corresponding to the first optical lens has a shape matched with the first optical lens, so that the shielding element can be adaptively arranged on the side wall of the protrusion.

5. The split lens according to claim 4, wherein: The shielding element further covers at least a portion of a transition region between the side wall and the upper surface of the protrusion. When the side wall of the protrusion is perpendicular to the upper surface of the structural area, the inner side surface of the shielding element includes a vertical surface matching the side wall and a curved surface matching the transition region.

6. The split lens according to claim 4, wherein: The shielding element further covers at least a portion of a transition region between the side wall and the upper surface of the protrusion. When the side wall of the protrusion is inclined to the upper surface of the structural area, the inner side surface of the shielding element includes an inclined surface adapted to the side wall and a curved surface adapted to the transition region.

7. The split lens according to claim 6, wherein: The angle formed between the side wall of the protrusion and the optical axis set by the first optical lens is less than 15°.

8. The split lens according to claim 4, wherein: The shape of the outer side surface of the shielding element is adapted to the shape of the side wall of the opening.

9. The split lens according to claim 6, wherein: The outer side surface of the shielding element is consistent in shape with the inner side surface of the shielding element.

10. The split lens according to claim 4, wherein: The outer side surface of the shielding element includes an inclined surface inclined inwardly.

11. The split lens according to claim 4, wherein: The shielding element has an inclined surface extending obliquely inwardly from a top end of the shielding element toward an inner side surface of the shielding element.

12. The split lens according to claim 11, wherein: The shielding element includes a light shielding layer formed on the inclined surface.

13. The split lens according to claim 11, wherein: The inclined surface has a certain degree of roughness.

14. The split lens according to claim 4, wherein: The shielding element includes a light shielding layer disposed on an upper surface of the shielding element.

15. The split lens according to claim 4, wherein: The upper surface of the shielding element has a certain degree of roughness.

16. The split lens according to claim 1, wherein: The first optical lens includes a light shielding layer disposed on a side wall portion of the protrusion that is not covered by the shielding element.

17. The split lens according to claim 4, wherein: The shielding element is directly sleeved on the side wall of the protruding portion.

18. The split lens according to claim 4, wherein: The shielding element is assembled on the side wall of the protruding portion by adhesive.

19. The split lens according to claim 18, wherein: The thickness of the adhesive is 0.02-0.05 mm.

20. A camera module, characterized in that: include: The split lens according to any one of claims 1 to 19; as well as Photosensitive components; Wherein, the split lens is maintained in the photosensitive path of the photosensitive component.

21. A terminal device, characterized in that: include: A camera module, comprising: a split lens and a photosensitive component according to any one of claims 1 to 19, wherein the split lens is maintained in a photosensitive path of the photosensitive component; A display screen with an opening; wherein the camera module and the display screen are installed on the same side of the terminal device to be configured as a front camera module, and when the camera module is assembled to the terminal device, the split lens of the camera module is embedded in the opening.

22. The terminal device according to claim 21, wherein: The offset between the central axis of the split lens and the central axis of the opening is less than 0.012 mm.

Images