A lens, a camera, and an electronic device

Abstract

Embodiments of the present application provide a lens, a camera, and an electronic device. The electronic device may include a mobile or fixed terminal such as a mobile phone, a tablet computer, a notebook computer, an ultra-mobile personal computer (UMPC), a handheld computer, a walkie-talkie, a netbook, a POS machine, a personal digital assistant (PDA), a wearable device, a virtual reality device, a wireless USB flash drive, a Bluetooth speaker / headphone, or an in-vehicle pre-installed device. By making the lens near the object side in the lens group have a convex surface, and after the convex surface protrudes from the shoulder of the lens barrel, the head of the lens can be reduced without affecting the maximum field of view of the lens, making the head of the lens tend to be miniaturized, thereby reducing the opening size on the display screen and increasing the screen-to-body ratio of the display screen.

Description

Technical Field

[0001] Embodiments of the present application relate to the technical field of terminals, and in particular to a lens, a camera, and an electronic device. Background Art

[0002] The shooting function has become an indispensable function for electronic devices (such as mobile phones, tablets, etc.). In order to obtain good image quality and shooting effects, electronic devices are equipped with multiple cameras to provide a wide range of photography functions.

[0003] Currently, the imaging device mainly includes a front camera and a rear camera. The front camera is disposed on the side facing the display screen of the electronic device, and the rear camera is disposed on the side facing the back cover of the electronic device. Among them, the front camera mainly includes: a lens, a support base, a filter, a photosensitive element, and a flexible printed circuit board (FPC). The structure of the lens is as Figure 1 and Figure 2 shown. The lens includes a lens barrel 1 and the following lenses arranged in sequence inside the lens barrel 1: a first lens G1, a first light-shielding sheet M1, a second lens G2, a second light-shielding sheet M2, a third lens G3, a third light-shielding sheet M3, a first spacer S11, a fourth light-shielding sheet M4, a fourth lens G4, a fifth light-shielding sheet M5, a second spacer S12, a sixth light-shielding sheet M6, a fifth lens G5, and a retaining ring 2.

[0004] However, the head of the above lens is relatively large, which causes a large opening on the display screen and reduces the screen-to-body ratio of the display screen. Summary of the Invention

[0005] The present application provides a lens, a camera, and an electronic device, which reduce the head size of the lens, so that the opening provided on the display screen for placing the camera is reduced, and the screen-to-body ratio of the display screen is improved.

[0006] The first aspect of the present application provides an electronic device, including: a display screen, a middle frame, a back cover, and at least one camera. The display screen and the back cover are located on both sides of the middle frame, and the camera is disposed on the middle frame and one end of the camera faces the display screen.

[0007] The camera at least includes: a lens, a bracket, a photosensitive element, and a flexible board. The bracket is located between the lens and the flexible board, and the photosensitive element is located at one end of the flexible board opposite to the lens.

[0008] An opening is provided on the display screen, and one end of the lens facing the object side extends into the opening.

[0009] The lens includes: a lens barrel and a lens group disposed inside the lens barrel. One end of the lens barrel facing the object side has a shoulder; the lens close to the object side in the lens group has a convex surface, and the convex surface protrudes from the shoulder.

[0010] By making the lens near the object side in the lens group have a convex surface, and after the convex surface protrudes from the shoulder of the lens barrel, the head of the lens can be reduced without affecting the maximum field of view of the lens, making the head of the lens tend to be miniaturized, thereby reducing the opening size on the display screen and increasing the screen-to-body ratio of the display screen.

[0011] In a possible implementation, the maximum distance that the convex surface protrudes from the shoulder is greater than or equal to 0.3 mm.

[0012] This makes the distance between the convex surface and the display screen smaller, so that the head of the lens can be further reduced without affecting the maximum field of view of the lens, making the head of the lens tend to be miniaturized, thereby reducing the opening size on the display screen and increasing the screen-to-body ratio of the display screen.

[0013] In a possible implementation, the lens near the object side in the lens group includes: an effective diameter region and a non-effective diameter region, the non-effective diameter region surrounds the outer edge of the effective diameter region, and the surface of the effective diameter region facing the object side is the convex surface;

[0014] The ratio of the central thickness of the effective diameter region to the thickness of the non-effective diameter region is 2.5 to 3.5.

[0015] This can ensure that the convex surface of the lens near the object side in the lens group can protrude from the shoulder of the lens barrel.

[0016] In a possible implementation, the ratio of the diameter of the effective diameter region to the central thickness of the effective diameter region is greater than 3.

[0017] In this way, when the central thickness of the effective diameter region of the lens is determined, the effective diameter of the lens can be obtained.

[0018] In a possible implementation, the wall thickness at the top end of the lens barrel is 0.1 - 0.25 mm. This enables the wall thickness at the top end of the lens barrel to be thinned to 0.1 mm, making the head size of the lens smaller and the opening of the display screen can be further reduced.

[0019] In a possible implementation, the lens group at least includes: a first lens, a second lens, a third lens, a fourth lens, and a fifth lens. The first lens is near the object side, the fifth lens is near the image side, and the convex surface is located on the surface of the first lens facing the object side.

[0020] In a possible implementation, the first lens and the fourth lens are plastic lenses with a refractive index greater than 1.6, and the second lens, the third lens, and the fifth lens are plastic lenses with a refractive index less than 1.55.

[0021] This can increase the beam turning ability of the lens group. The distance between the surface of the lens group facing the object side and the imaging surface of the photosensitive element on the optical axis is shortened by 0.2 mm. Therefore, in the embodiment of the present application, the distance between the side of the lens group facing the object side and the photosensitive element is shortened, so that the height of the formed camera is reduced. When applied to an electronic device, the thickness of the electronic device can be thinned.

[0022] In a possible implementation manner, the first lens is a plastic lens made of a resin material, and the melt index of the resin material is greater than 20 g / 10 min.

[0023] This can improve the molding filling rate of a lens with a relatively large ratio of central thickness to edge thickness, ensure the optical quality of the lens, and improve the imaging clarity of an ultra-small head camera.

[0024] In a possible implementation manner, the first lens is a glass lens with a refractive index greater than 1.6, the fourth lens is a plastic lens with a refractive index greater than 1.6, and the second lens, the third lens, and the fifth lens are plastic lenses with a refractive index less than 1.55.

[0025] This can increase the beam turning ability of the lens group. The distance between the surface of the lens group facing the object side and the imaging surface of the photosensitive element on the optical axis is shortened by 0.2 mm. Therefore, in the embodiment of the present application, the distance between the side of the lens group facing the object side and the photosensitive element is shortened, so that the height of the formed camera is reduced. When applied to an electronic device, the thickness of the electronic device can be thinned.

[0026] In a possible implementation manner, the first lens has a positive optical power, and the fourth lens has a negative optical power.

[0027] This enables the first lens to have a converging effect and the fourth lens to have a diffusing effect, so that the lens group can shorten the optical path difference and increase the beam turning ability of the lens group.

[0028] In a possible implementation manner, the dispersion coefficients of the first lens and the fourth lens are less than 30, and the dispersion coefficients of the second lens, the third lens, and the fifth lens are greater than 40.

[0029] This can eliminate the comprehensive chromatic aberration, making the lateral chromatic aberration (LCA) less than 1 μm and the axial chromatic aberration (LoCA) < 5 μm.

[0030] In a possible implementation manner, the lens group at least includes: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. The first lens is close to the object side, the sixth lens is close to the image side, and the convex surface is located on the side of the first lens facing the object side.

[0031] In a possible implementation, the first lens, the third lens, and the fifth lens are plastic lenses with a refractive index greater than 1.6, and the second lens, the fourth lens, and the sixth lens are plastic lenses with a refractive index less than 1.55.

[0032] This can increase the beam turning ability of the lens group. The distance between the surface of the lens group facing the object side and the imaging surface of the photosensitive element on the optical axis is shortened by 0.2 mm. Therefore, in the embodiments of the present application, the distance between the surface of the lens group facing the object side and the photosensitive element is shortened, so that the height of the formed camera is reduced. When applied to an electronic device, the thickness of the electronic device can be thinned.

[0033] In a possible implementation, the first lens is a glass lens with a refractive index greater than 1.6, the third lens and the fifth lens are plastic lenses with a refractive index greater than 1.6, and the second lens, the fourth lens, and the sixth lens are plastic lenses with a refractive index less than 1.55.

[0034] This can increase the beam turning ability of the lens group. The distance between the surface of the lens group facing the object side and the imaging surface of the photosensitive element on the optical axis is shortened by 0.2 mm. Therefore, in the embodiments of the present application, the distance between the surface of the lens group facing the object side and the photosensitive element is shortened, so that the height of the formed camera is reduced. When applied to an electronic device, the thickness of the electronic device can be thinned.

[0035] In a possible implementation, the first lens has a positive optical power, the third lens has a negative optical power, and the fifth lens has a positive optical power.

[0036] This enables the first lens to have a light-gathering effect, the third lens to have a diffusing effect, and the fifth lens to have a light-gathering effect, so that the lens group can shorten the optical path difference and increase the beam turning ability of the lens group.

[0037] In a possible implementation, the dispersion coefficients of the first lens, the third lens, and the fifth lens are less than 30, and the dispersion coefficients of the second lens, the fourth lens, and the sixth lens are greater than 40.

[0038] This can eliminate the combined chromatic aberration, making the lateral chromatic aberration (LCA) less than 1 μm and the longitudinal chromatic aberration (LoCA) < 5 μm.

[0039] In a possible implementation, it further includes: a protection structure: the protection structure is provided on the shoulder, and one end of the protection structure extends to one end of the convex surface close to the shoulder.

[0040] Through the protection structure, the outer convex edge of the lens can be protected. In addition, the protection structure can be blackened (for example, the inner side and the side facing the display screen are blackened), subjected to anti-reflection treatment or sandblasting treatment to block stray light. The protection structure can also play a role in decorating the shoulder of the lens barrel, making the shoulder of the lens barrel darker in appearance.

[0041] In a possible implementation, the display screen includes: a transparent protection cover plate and a display module, and an opening is provided at a position corresponding to the lens in the display module.

[0042] In a possible implementation, the display module is an OLED display module, or the display module is a liquid crystal display module.

[0043] The liquid crystal display module includes a liquid crystal panel and a backlight element. The liquid crystal panel is located between the lens protection cover plate and the backlight element, and an opening is provided on the backlight element, or openings that communicate with each other are provided on both the backlight element and the liquid crystal panel.

[0044] A second aspect of the embodiments of the present application provides a lens, including: a lens barrel and a lens group provided in the lens barrel, and one end of the lens barrel facing the object side has a shoulder.

[0045] The lens in the lens group close to the object side has a convex surface, and the convex surface protrudes from the shoulder.

[0046] By making the lens in the lens group close to the object side have a convex surface and the convex surface protruding from the shoulder of the lens barrel, the head of the lens can be reduced without affecting the maximum field of view of the lens, making the head of the lens tend to be miniaturized, so that the opening size on the display screen is reduced, and the screen-to-body ratio of the display screen is improved.

[0047] In a possible implementation, the maximum distance that the convex surface protrudes from the shoulder is greater than or equal to 0.3 mm.

[0048] This makes the distance between the convex surface and the display screen smaller, so that the head of the lens can be further reduced without affecting the maximum field of view of the lens, making the head of the lens tend to be miniaturized, so that the opening size on the display screen is reduced, and the screen-to-body ratio of the display screen is improved.

[0049] In a possible implementation, the lens in the lens group close to the object side includes: an effective diameter region and a non-effective diameter region. The non-effective diameter region surrounds the outer edge of the effective diameter region, and the side of the effective diameter region facing the object side is the convex surface;

[0050] The ratio of the central thickness of the effective diameter region to the thickness of the non-effective diameter region is 2.5 to 3.5.

[0051] This can ensure that the convex surface of the lens near the object side in the lens group can protrude from the shoulder of the lens barrel.

[0052] In a possible implementation, the ratio of the diameter of the effective diameter region to the central thickness of the effective diameter region is greater than 3.

[0053] In this way, when the central thickness of the effective diameter region of the lens is determined, the effective diameter of the lens can be obtained.

[0054] In a possible implementation, the wall thickness at the top end of the lens barrel is 0.1 - 0.25 mm.

[0055] This enables the wall thickness at the top end of the lens barrel to be thinned to 0.1 mm, the head size of the lens is smaller, and the opening of the display screen can be further reduced.

[0056] In a possible implementation, the lens group at least includes: a first lens, a second lens, a third lens, a fourth lens, and a fifth lens. The first lens is near the object side, the fifth lens is near the image side, and the convex surface is on the side of the first lens facing the object side.

[0057] In a possible implementation, the first lens and the fourth lens are plastic lenses with a refractive index greater than 1.6, and the second lens, the third lens, and the fifth lens are plastic lenses with a refractive index less than 1.55.

[0058] This can increase the beam turning ability of the lens group. The distance between the surface of the lens group facing the object side and the imaging surface of the photosensitive element on the optical axis is shortened by 0.2 mm. Therefore, in the embodiments of the present application, the distance between the side of the lens group facing the object side and the photosensitive element is shortened, and the height of the formed camera is reduced. When applied to an electronic device, the thickness of the electronic device can be thinned.

[0059] In a possible implementation, the first lens is a plastic lens made of a resin material, and the melt index of the resin material is greater than 20 g / 10 min.

[0060] This can improve the molding filling rate of the lens with a relatively large ratio of central thickness to edge thickness, ensure the optical quality of the lens, and improve the imaging clarity of the ultra-small head camera.

[0061] In a possible implementation, the first lens is a glass lens with a refractive index greater than 1.6, the fourth lens is a plastic lens with a refractive index greater than 1.6, and the second lens, the third lens, and the fifth lens are plastic lenses with a refractive index less than 1.55.

[0062] This can increase the beam turning ability of the lens group. The distance between the surface of the lens group facing the object side and the imaging surface of the photosensitive element on the optical axis is shortened by 0.2 mm. Therefore, in the embodiments of the present application, the distance between the side of the lens group facing the object side and the photosensitive element is shortened, so that the height of the formed camera is reduced. When applied to an electronic device, the thickness of the electronic device can be thinned.

[0063] In a possible implementation manner, the first lens has a positive optical power, and the fourth lens has a negative optical power.

[0064] This enables the first lens to have a light-gathering effect and the fourth lens to have a diffusing effect, so that the lens group can shorten the optical path difference and increase the beam turning ability of the lens group.

[0065] In a possible implementation manner, the Abbe numbers of the first lens and the fourth lens are less than 30, and the Abbe numbers of the second lens, the third lens, and the fifth lens are greater than 40.

[0066] This can eliminate the combined chromatic aberration, making the lateral chromatic aberration (LCA) less than 1 μm and the longitudinal chromatic aberration (LoCA) < 5 μm.

[0067] In a possible implementation manner, the lens group at least includes: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. The first lens is close to the object side, the sixth lens is close to the image side, and the convex surface is located on the side of the first lens facing the object side.

[0068] In a possible implementation manner, the first lens, the third lens, and the fifth lens are plastic lenses with a refractive index greater than 1.6, and the second lens, the fourth lens, and the sixth lens are plastic lenses with a refractive index less than 1.55.

[0069] This can increase the beam turning ability of the lens group. The distance between the surface of the lens group facing the object side and the imaging surface of the photosensitive element on the optical axis is shortened by 0.2 mm. Therefore, in the embodiments of the present application, the distance between the side of the lens group facing the object side and the photosensitive element is shortened, so that the height of the formed camera is reduced. When applied to an electronic device, the thickness of the electronic device can be thinned.

[0070] In a possible implementation manner, the first lens is a glass lens with a refractive index greater than 1.6, the third lens and the fifth lens are plastic lenses with a refractive index greater than 1.6, and the second lens, the fourth lens, and the sixth lens are plastic lenses with a refractive index less than 1.55.

[0071] This can increase the beam folding ability of the lens group. The distance between the surface of the lens group facing the object side and the imaging surface of the photosensitive element on the optical axis is shortened by 0.2 mm. Therefore, in the embodiment of the present application, the distance between the side of the lens group facing the object side and the photosensitive element is shortened, so that the height of the formed camera is reduced. When applied to an electronic device, the thickness of the electronic device can be thinned.

[0072] In a possible implementation manner, the first lens has a positive optical power, the third lens has a negative optical power, and the fifth lens has a positive optical power.

[0073] This enables the first lens to have a light-gathering effect, the third lens to have a diffusing effect, and the fifth lens to have a light-gathering effect, so that the lens group can shorten the optical path difference and increase the beam folding ability of the lens group.

[0074] In a possible implementation manner, the dispersion coefficients of the first lens, the third lens, and the fifth lens are less than 30, and the dispersion coefficients of the second lens, the fourth lens, and the sixth lens are greater than 40.

[0075] This can eliminate the overall chromatic aberration, making the lateral chromatic aberration (LCA) less than 1 μm and the longitudinal chromatic aberration (LoCA) < 5 μm.

[0076] In a possible implementation manner, it further includes: a protection structure: the protection structure is provided on the shoulder, and one end of the protection structure extends to one end of the convex surface close to the shoulder.

[0077] Through the protection structure, the outer edge of the convex surface of the lens can be protected. In addition, the protection structure can be blackened (for example, the inner side and the side facing the display screen of the protection structure are blackened), anti-reflection or sandblasted to block stray light. The protection structure can also play a role in decorating the shoulder of the lens barrel, making the shoulder of the lens barrel darker in appearance.

[0078] The third aspect of the embodiment of the present application provides a camera, at least including: the lens, the bracket, the photosensitive element, and the flexible board described in any one of the above. The bracket is located between the lens and the flexible board, and the photosensitive element is located at one end of the flexible board opposite to the lens.

[0079] By including the above lens, the lens close to the object side in the lens group has a convex surface. After the convex surface protrudes from the shoulder of the lens barrel, the head of the lens can be reduced without affecting the maximum field of view of the lens, making the head of the lens tend to be miniaturized, thereby reducing the opening size on the display screen and improving the screen-to-body ratio of the display screen.

[0080] In a possible implementation, the camera is a front camera, or the camera is a rear camera.

[0081] When the camera is a front camera, the size of the opening provided on the display screen for placing the lens can be reduced. When the camera is a rear camera, the size of the head of the lens can be reduced, so that the opening provided on the rear cover for placing the rear camera is reduced, making the appearance of the rear cover more beautiful and the strength of the rear cover better. Description of the Drawings

[0082] Figure 1 is a schematic cross-sectional structure diagram of an existing lens;

[0083] Figure 2 is a schematic structural diagram of an electronic device provided by an embodiment of the present application;

[0084] Figure 3 is an exploded structural diagram of an electronic device provided by an embodiment of the present application;

[0085] Figure 4 is a schematic split structure diagram of a transparent protection cover plate and a display module in a display screen of an electronic device provided by an embodiment of the present application;

[0086] Figure 5 is a schematic split structure diagram of a transparent protection cover plate, a liquid crystal panel and a backlight element in a display screen of an electronic device provided by an embodiment of the present application;

[0087] Figure 6 is an exploded structural diagram of a front camera in an electronic device provided by an embodiment of the present application;

[0088] Figure 7 is a schematic partial cross-sectional structure diagram of a front camera and a display screen, a frame and a rear cover in an electronic device provided by an embodiment of the present application;

[0089] Figure 8 is a schematic partial cross-sectional structure diagram of a front camera and a display screen, a middle frame and a rear cover in an electronic device provided by an embodiment of the present application;

[0090] Figure 9 is an exploded structural diagram of a lens in a front camera of an electronic device provided by an embodiment of the present application;

[0091] Figure 10 is a schematic structural diagram between a first lens in the lens and a liquid crystal panel;

[0092] Figure 11 is a schematic structural diagram between a first lens in a lens provided by an embodiment of the present application and a liquid crystal panel;

[0093] Figure 12Schematic diagram of the structure of the first lens in the front camera of the electronic device provided by an embodiment of the present application;

[0094] Figure 13 Assembly schematic diagram of the lens barrel and the first lens in the front camera of the electronic device provided by an embodiment of the present application;

[0095] Figure 14 Schematic diagram of the front camera of the electronic device provided by an embodiment of the present application, the liquid crystal panel and the transparent protection cover plate;

[0096] Figure 15 Schematic diagram of the structure of the lens group, the filter and the photosensitive element 24 in the front camera of the electronic device provided by an embodiment of the present application;

[0097] Figure 16 Schematic diagram of the structure of the lens group, the filter and the photosensitive element 24 in the front camera of the electronic device provided by an embodiment of the present application.

[0098] Explanation of reference numerals:

[0099] 100 - mobile phone; 10 - display screen; 11 - opening; 12 - transparent protection cover plate; 13 - display module; 131 - backlight element;

[0100] 132 - liquid crystal panel; 14 - protection structure; 20 - front camera; 21 - lens; 21a - head; 21b - bottom;

[0101] 210 - lens barrel; 2101 - shoulder; 2102 - top; 2103 - first bearing part; 2104 - opening; 211 - first lens;

[0102] 211a - convex surface; 2111 - effective diameter area; 2112 - non - effective diameter area; 212 - second lens; 213 - third lens;

[0103] 214 - fourth lens; 215 - fifth lens; 216 - sixth lens; 22 - filter; 23 - bracket; 24 - photosensitive element;

[0104] 25 - flexible board; 26 - connector; 30 - middle frame; 31 - border; 32 - metal middle plate; 40 - circuit board; 50 - battery;

[0105] 60 - rear cover. Detailed implementation manners

[0106] The terms used in the implementation manners part of the present application are only used to explain the specific embodiments of the present application, rather than aiming to limit the present application. The implementation manners of the embodiments of the present application will be described in detail below with reference to the drawings.

[0107] An electronic device provided in an embodiment of the present application may include, but is not limited to, mobile or fixed terminals with a shooting function such as mobile phones, tablet computers, laptop computers, ultra-mobile personal computers (UMPCs), handheld computers, walkie-talkies, netbooks, POS machines, personal digital assistants (PDAs), driving recorders, and security devices.

[0108] In the embodiment of the present application, a mobile phone is taken as an example of the above-mentioned electronic device for illustration. Figure 2 and Figure 3 respectively show the overall and disassembled structures of the mobile phone. Refer to Figure 2 As shown, the display screen of the mobile phone 100 provided in the embodiment of the present application may be a water-drop screen, a notch screen, or a hole-drilled screen. The following description takes the hole-drilled screen as an example for illustration. Refer to Figure 3 As shown, the mobile phone 100 may include: a display screen 10 and a rear cover 60. A middle frame 30, a circuit board 40, and a battery 50 may be arranged between the display screen 10 and the rear cover 60. Among them, the circuit board 40 and the battery 50 may be arranged on the middle frame 30. For example, the circuit board 40 and the battery 50 are arranged on one side of the middle frame 30 facing the rear cover 60, or the circuit board 40 and the battery 50 may be arranged on one side of the middle frame 30 facing the display screen 10.

[0109] The battery 50 may be connected to the charging management module and the circuit board 40 through a power management module. The power management module receives the inputs of the battery 50 and / or the charging management module and supplies power to the processor, internal memory, external memory, display screen 10, camera, and communication module, etc. The power management module may also be used to monitor parameters such as the battery 50 capacity, the battery 50 cycle times, and the battery 50 health status (leakage, impedance). In some other embodiments, the power management module may also be arranged in the processor of the circuit board 40. In some other embodiments, the power management module and the charging management module may also be arranged in the same device.

[0110] The display screen 10 may be an Organic Light-Emitting Diode (OLED) display screen or a Liquid Crystal Display (LCD).

[0111] The rear cover 60 may be a metal rear cover, a glass rear cover, a plastic rear cover, or a ceramic rear cover. In the embodiment of the present application, the material of the rear cover 60 is not limited.

[0112] The middle frame 30 may include a metal middle plate 32 and a frame 31. The frame 31 is disposed around the outer periphery of the metal middle plate 32 for one week. Generally speaking, the frame 31 may include a top frame, a bottom frame, a left frame, and a right frame. The top frame, the bottom frame, the left frame, and the right frame enclose the frame 31 in a square ring structure. Among them, the metal middle plate 32 may be an aluminum plate, may also be an aluminum alloy, or may also be a magnesium alloy. The frame 31 may be a metal frame or a ceramic frame. Among them, the metal middle frame 30 and the frame 31 may be snap-connected, welded, bonded, or integrally formed, or the metal middle frame 30 and the frame 31 are fixedly connected by injection molding.

[0113] It should be noted that, in some examples, the rear cover 60 of the mobile phone 100 may be connected to the frame 31 to form an integrally formed (Unibody) rear cover. For example, the mobile phone 100 may include: a display screen 10, a metal middle plate 32, and a battery cover. The battery cover may be a rear cover formed by integrally forming the frame 31 and the rear cover 60. In this way, the circuit board 40 and the battery 50 are located in the space surrounded by the metal middle frame 30 and the battery cover.

[0114] Among them, in order to implement the shooting function, the mobile phone 100 may further include: a camera and a flash (not shown). The camera may include a front camera and a rear camera (not shown). Among them, the rear camera and the flash may be disposed on the surface of the metal middle plate 32 facing the rear cover 60. Installation holes for installing partial areas of the flash and the rear camera are formed on the rear cover 60. The front camera may be disposed on the surface of the metal middle plate 32 facing the display screen 10. In the embodiments of the present application, the installation positions of the front camera and the rear camera include but are not limited to the above description. Among them, in some embodiments, the number of the front camera and the rear camera provided in the mobile phone 100 may be 1 or N, and N is a positive integer greater than 1.

[0115] It can be understood that the structure schematically shown in the embodiments of the present application does not constitute a specific limitation on the mobile phone 100. In other embodiments of the present application, the mobile phone 100 may include more or fewer components than those shown in the figure, or combine certain components, or split certain components, or have different component arrangements. The components shown in the figure may be implemented in hardware, software, or a combination of software and hardware.

[0116] Based on the above description, in the embodiments of the present application, the scenario where the front camera 20 is provided in the mobile phone 100 is taken as an example for description.

[0117] Scenario 1

[0118] In the embodiments of the present application, refer to Figure 3As shown, in order to implement the shooting of the front camera 20, an opening 11 matching the lens 21 of the front camera 20 is formed on the display screen 10, so that external light can enter the front camera 20 to implement shooting. It should be understood that, as Figure 4 shown, the display screen 10 may include a transparent protection cover plate 12 and a display module 13. The transparent protection cover plate 12 may be, for example, a glass cover plate or a sapphire cover plate. When forming the opening 11 on the display screen 10, the opening 11 may be formed on the display module 13 of the display screen 10.

[0119] In the embodiment of the present application, the display module 13 may be an OLED display module, or the display module 13 may be a liquid crystal display module. When the display module 13 is a liquid crystal display module, as Figure 5 shown, the liquid crystal display module may include a liquid crystal panel 132 and a backlight element 131. The backlight element 131 is disposed below the liquid crystal panel 132 and is used to provide a backlight source for the liquid crystal panel 132.

[0120] Among them, when forming the opening 11 on the liquid crystal display module, the opening 11 may be a through hole or a blind hole. For example, Figure 4 as shown, the opening 11 may be formed on the backlight element 131, and the liquid crystal panel 132 is not opened, so that the opening 11 formed on the liquid crystal display module is a blind hole. Or, in other examples, the opening 11 is formed on both the liquid crystal panel 132 and the backlight element 131, so that the opening 11 formed on the liquid crystal display module is a through hole. The size of the opening 11 is set according to the size of the lens 21 of the front camera 20.

[0121] Generally, the display screen 10 may further include a touch panel (Touch Panel, TP). The touch panel (not shown) may be disposed between the display module 13 and the transparent protection cover plate 12 (i.e., TP on cell), or the touch panel may be disposed in the film layer of the display module 13 (i.e., TP in cell). The display module 13 is used to output display content to the user, and the touch panel is used to receive touch events input by the user on the display screen 10.

[0122] In the embodiment of the present application, refer to Figure 6As shown, the front camera 20 may include: a lens 21, a filter 22, a holder 23, an image sensor 24, a flexible printed circuit (FPC) 25, and a connector 26. One end of the lens 21 is connected to one end of the holder 23, and the other end of the holder 23 is fixed to one end of the flexible printed circuit 25. The connector 26 is fixed to the other end of the flexible printed circuit 25, and the connector 26 electrically connects the flexible printed circuit 25 to the circuit board 40. The holder 23 and the bottom end of the lens 21 may be connected by welding, snap connection, adhesion, or screw connection. The holder 23 and the flexible circuit board 40 are fixedly connected by adhesion, snap connection, or welding. The material of the holder 23 may be plastic or metal. It should be noted that Figure 5 the shown front camera 20 is a camera with a fixed focal length. When the front camera 20 is a camera with a variable focal length, the front camera 20 may further include a focusing module (not shown), such as a focusing motor, and the focusing motor may be provided on the holder 23.

[0123] The filter 22 may be located between the lens 21 and the holder 23. For example, the filter 22 may be installed in the hollow area of the holder 23. The image sensor 24 is provided at one end of the flexible printed circuit 25. The image sensor 24 is electrically connected to the flexible printed circuit 25, and the holder 23 surrounds the outer edge of the image sensor 24.

[0124] In the embodiment of the present application, the filter 22 may be an infrared cut filter (IRCF). The filter 22 can filter out infrared light to prevent infrared light from entering the lens 21 and affecting imaging.

[0125] The photosensitive element 24 can be a charge coupled device (CCD) or a complementary metal-oxide-semiconductor (CMOS) phototransistor. The connector 26 is used to electrically connect the flexible board 25 to the image signal processing (ISP) unit on the circuit board 40, and the ISP unit is electrically connected to the digital signal processing (DSP) unit. Among them, the ISP unit and the DSP unit can be separately arranged on the circuit board 40, or the ISP unit and the DSP unit can be integrated and arranged on the circuit board 40. For example, when taking a photo, the shutter is opened, and the light passes through the lens 21 and the filter 22 and is transmitted to the photosensitive element 24. The optical signal is converted into an electrical signal, and the photosensitive element 24 transmits the electrical signal to the ISP for processing through the flexible board 25 and the connector 26. The ISP converts the electrical signal into a digital image signal, and the ISP outputs the digital image signal to the DSP for processing. The DSP converts the digital image signal into an image signal in standard formats such as RGB and YUV.

[0126] In the embodiment of the present application, when the front camera 20 is arranged in the mobile phone 10, as Figure 7 shown, the head 21a of the lens 21 of the front camera 20 can be located in the opening 11. Among them, the width L of the opening 11 = L1 + L2 + L3, L1 is 1 / 2 of the width of the head 21a of the lens 21, L2 is 1 / 2 of the width of the bottom 21b of the lens 21, and L3 is the reserved assembly gap width. Therefore, in order to reduce the width L of the opening 11, in the embodiment of the present application, the width of the head 21a of the lens 21 is reduced. After the width of the head 21a of the lens 21 is reduced, the width L of the opening 11 is reduced, so that the area of the opening 11 on the display screen 10 is reduced, and the screen-to-body ratio is increased. The specific implementation method is as described below.

[0127] In the embodiment of the present application, as Figure 8 shown, the front camera 20 is arranged on the metal middle plate 32. One end of the front camera 20 faces the opening 11 and extends in, and the other end is located on the side of the metal middle plate 32 facing the rear cover 60. The circuit board 40 is fixed on the side of the metal middle plate 32 facing the rear cover 60, and the connector 26 of the front camera 20 is electrically connected to the circuit board 40.

[0128] In the embodiment of the present application, as Figure 9As shown, the lens 21 may include: a lens barrel 210 and a lens group disposed within the lens barrel 210. Among them, the lens group may include multiple lenses. For example, it may include 5 lenses or 6 lenses. In the embodiments of the present application, an example where the lens group includes 5 lenses is used for illustration.

[0129] Exemplarily, as Figure 9 shown, the lens group may sequentially include, from the object side to the image side: a first lens 211, a second lens 212, a third lens 213, a fourth lens 214, and a fifth lens 215. For example, the first lens 211 is close to the object side, and the fifth lens 215 is close to the image side. The object side is the side of the object to be photographed, and the image side is the side of imaging. Each lens may be a plastic lens or a glass lens. Alternatively, some lenses in the lens group may be plastic lenses, and some lenses may be glass lenses. A spacer (not shown) may be provided between some adjacent lenses to separate the adjacent two lenses by a preset distance. A light-shielding film may be provided on the outer edge of each lens or the outer edge of each lens may be blackened to block stray light within the lens barrel 210.

[0130] In the embodiments of the present application, in order to reduce the size of the head 21a of the lens 21, as Figure 9 shown, one end of the lens barrel 210 facing the object side has a shoulder 2101. One side of the first lens 211 facing the object side is a convex surface 211a, and the convex surface 211a protrudes from the shoulder 2101 of the lens barrel 210. For example, the convex surface 211a of the first lens 211 protrudes from inside the lens barrel 210 to the outside of the lens barrel 210, and the convex surface 211a of the first lens 211 is exposed outside the lens barrel 210. In this way, the distance h2 between the convex surface 211a of the first lens 211 and the liquid crystal panel 132 is reduced. When the distance h2 between the convex surface 211a of the first lens 211 and the liquid crystal panel 132 is reduced, as Figure 10 shown, on the premise that the opening 11 remains unchanged, the angle a2 formed when the convex surface 211a of the first lens 211 protrudes from the shoulder 2101 of the lens barrel 210 (i.e., Figure 10 the dotted line shown) is greater than the angle a1 formed when the convex surface 211a of the first lens 211 does not protrude from the shoulder 2101 of the lens barrel 210 (i.e., Figure 10 the solid line shown). Therefore, after the convex surface 211a of the first lens 211 protrudes from the shoulder 2101 of the lens barrel 210, the distance h2 between the convex surface 211a of the first lens 211 and the liquid crystal panel 132 is reduced, which makes the angle formed between the convex surface 211a of the first lens 211 and the opening 11 increase. However, in the embodiments of the present application, when the convex surface 211a of the first lens 211 protrudes from the shoulder 2101 of the lens barrel 210, the angle formed between the first lens 211 and the opening 11 remains unchanged. For example, a1 = a2. At this time, as Figure 11As shown, the effective diameter of the first lens 211 is reduced. For example, the effective diameter of the first lens 211 is reduced from D to D1. After the effective diameter of the first lens 211 is reduced, the size of the head 21a of the lens 21 is reduced. When the size of the head 21a of the lens 21 is reduced (i.e., Figure 7 L1 in Figure 7 is reduced), the width L of the opening 11 ( Figure 7 shown) is reduced, so that the opening 11 is reduced. At this time, the angle a2 formed between the convex surface 211a of the first lens 211 and the opening 11 is the same as the angle a1 formed when the convex surface 211a of the first lens 211 does not protrude from the shoulder 2101 of the lens barrel 210. Therefore, in the embodiment of the present application, after the convex surface 211a of the first lens 211 protrudes from the shoulder 2101 of the lens barrel 210, the head 21a of the lens 21 can be reduced without affecting the maximum field of view of the lens 21, making the head 21a of the lens 21 tend to be miniaturized, so that the size of the opening 11 on the display screen is reduced, and the screen-to-body ratio of the display screen is improved.

[0131] In a possible implementation manner, in the embodiment of the present application, the maximum distance h1 at which the convex surface 211a of the first lens 211 protrudes from the shoulder 2101 of the lens barrel 210 is greater than or equal to 0.3 mm. For example, the maximum distance h1 between the convex surface 211a of the first lens 211 and the shoulder 2101 of the lens barrel 210 can be 0.3 mm, or the maximum distance h1 between the convex surface 211a of the first lens 211 and the shoulder 2101 of the lens barrel 210 can be 0.4 mm.

[0132] In a possible implementation manner, in the embodiment of the present application, as Figure 12 shown, the first lens 211 includes an effective diameter region 2111 and a non-effective diameter region 2112. The non-effective diameter region 2112 surrounds the outer edge of the effective diameter region 2111. The non-effective diameter region 2112 is used to abut against the lens barrel 210 and the adjacent second lens 212 or the light shield when the first lens 211 is assembled in the lens barrel 210. In some examples, the non-effective diameter region can be blackened to avoid stray light affecting imaging.

[0133] In the embodiment of the present application, in order to make the convex surface 211a of the first lens 211 protrude from the shoulder 2101 of the lens barrel 210, the thickness of the effective diameter region 2111 of the first lens 211 is increased. Therefore, in the embodiment of the present application, the ratio of the central thickness h3 of the effective diameter region 2111 of the first lens 211 to the thickness h4 of the non-effective diameter region 2112 is 2.5 - 3.5. For example, the ratio of the central thickness h3 of the effective diameter region 2111 of the first lens 211 to the thickness h4 of the non-effective diameter region 2112 can be 3, or the ratio of the central thickness h3 of the effective diameter region 2111 of the first lens 211 to the thickness h4 of the non-effective diameter region 2112 can be 3.3. In this way, it can be ensured that the convex surface 211a of the first lens 211 can protrude from the shoulder 2101 of the lens barrel 210.

[0134] In a possible implementation manner, in the embodiment of the present application, the ratio of the effective diameter (i.e., the diameter of the effective diameter region 2111) D1 of the first lens 211 to the central thickness h3 of the effective diameter region 2111 of the first lens 211 is greater than 3. For example, the ratio of the effective diameter D1 of the first lens 211 to the central thickness h3 of the effective diameter region 2111 of the first lens 211 can be 3.5, or the ratio of the effective diameter D1 of the first lens 211 to the central thickness h3 of the effective diameter region 2111 of the first lens 211 can be 4. In this way, when the central thickness h3 of the effective diameter region 2111 of the first lens 211 is determined, the effective diameter D1 of the first lens 211 can be obtained. In the embodiment of the present application, the width d of the non-effective diameter region 2112 of the first lens 211 only needs to satisfy that the first lens 211 abuts within the lens barrel 210. For example, the width d of the non-effective diameter region 2112 of the first lens 211 can be 0.2 - 0.5 mm. For example, the width d of the non-effective diameter region 2112 of the first lens 211 can be 0.25 mm, or the width d of the non-effective diameter region 2112 of the first lens 211 can be 0.4 mm.

[0135] In a possible implementation manner, as Figure 13As shown, a plurality of bearing portions (such as a stepped structure inside the lens barrel 210) for bearing each lens are provided on the inner wall of the lens barrel 210. In the embodiment of the present application, since the convex surface 211a of the first lens 211 protrudes from the shoulder 2101 of the lens barrel 210, during assembly, the effective diameter region 2111 of the first lens 211 is located in the opening 2104 surrounded by the top end 2102 of the lens barrel 210. In order to achieve the bearing of the first lens 211, a first bearing portion 2103 is formed on the inner wall of the lens barrel 210 near the top end 2102 of the lens barrel 210. In this way, when the first lens 211 is assembled, the non-effective diameter region 2112 of the first lens 211 can bear on the first bearing portion 2103, and the effective diameter region 2111 of the first lens 211 is located in the opening 2104. When the first bearing portion 2103 is arranged close to the inner wall of the top end 2102 of the lens barrel 210, it avoids forming a bearing portion on the inner wall of the top end 2102 of the lens barrel 210, while Figure 1 the first lens in Figure 1 bears on the inner wall of the top end of the lens barrel (see Figure 1 ), so Figure 1 the wall thickness of the top end of the lens barrel in

[0136] In some other embodiments, when the wall thickness H of the top end 2102 of the lens barrel 210 is thinned to 0.1 mm, in order to enhance the strength of the top end 2102 of the lens barrel 210, when the lens barrel 210 is made of a resin material, glass fibers can be added to the resin material to increase the strength of the lens barrel 210 through the glass fibers, avoiding damage to the top end 2102 of the lens barrel 210 when the head 21a of the lens 21 is squeezed, and ensuring the reliability of the head 21a of the lens 21.

[0137] In a possible implementation, in the embodiments of the present application, a protection structure 14 is provided on the shoulder 2101 of the first lens 211. The protection structure 14 can extend to one end of the convex surface 211a of the first lens 211 near the shoulder 2101. The protection structure 14 can protect the outer edge of the convex surface 211a of the first lens 211. In addition, the protection structure 14 can be blackened (for example, the inner side and the side facing the display screen of the protection structure 14 are blackened), subjected to anti-reflection or sandblasting treatment to block stray light. Therefore, in the embodiments of the present application, the protection structure 14 can also play a role in decorating the shoulder 2101 of the lens barrel 210, making the shoulder 2101 of the lens barrel 210 darker in appearance.

[0138] In a possible implementation, in the embodiments of the present application, the convex surface 211a of the first lens 211 and the side of the first lens 211 facing the image side can be aspherical surfaces, and the two sides of the second lens 212, the third lens 213, the fourth lens 214, and the fifth lens 215 facing the image side and the object side can all be aspherical surfaces. Among them, the aspherical surfaces of each lens can be designed according to the following curve equation:

[0139]

[0140] where z is the point on the aspherical surface at a distance r from the optical axis, and its relative distance from the tangent plane at the intersection of the aspherical surface and the optical axis; r is the perpendicular distance from the point on the aspherical curve to the optical axis; c is the curvature; k is the conic coefficient; is the i-th order aspherical coefficient, are the spherical coordinates of each order.

[0141] In a possible implementation, the first lens 211 is made of a resin material, and the melt flow rate (MFR) of the resin material is greater than 20 g / 10 min. This can improve the molding filling rate of the lens with a large ratio of the central thickness to the edge thickness, ensure the optical quality of the first lens 211, and improve the imaging clarity of the camera with an extremely small head 21a.

[0142] In a possible implementation, in order to reduce the height of the front camera, for example, the distance (i.e., TTL) between the surface of the first lens 211 facing the object side and the imaging surface of the photosensitive element 24 on the optical axis can be reduced. Therefore, in the embodiments of the present application, the first lens 211, the second lens 212, the third lens 213, the fourth lens 214, and the fifth lens 215 are plastic lenses (Plastic) made of resin material. The first lens 211 has a positive optical power, the fourth lens 214 has a negative optical power, the refractive indices of the first lens 211 and the fourth lens 214 are greater than 1.6, and the refractive indices of the second lens 212, the third lens 213, and the fifth lens 215 are less than 1.55. For example, the refractive indices of the first lens 211, the second lens 212, the third lens 213, the fourth lens 214, and the fifth lens 215 can be 1.6688, 1.535, 1.5443, 1.66, and 1.535 respectively. This can increase the beam folding ability of the lens group. After testing, it is found that as Figure 15 shown, the imaging position moves from the photosensitive element 24 shown by the dotted line in Figure 15 to the photosensitive element 24 shown by the solid line. The distance between the surface of the first lens 211 facing the object side and the imaging surface of the photosensitive element 24 on the optical axis is reduced from H2 to H1, shortening by 0.2 mm (i.e., H2 - H1 = 0.2 mm). Therefore, in the embodiments of the present application, the distance between the first lens 211 and the photosensitive element 24 is shortened, so that the height of the formed front camera is reduced. When applied to an electronic device, the thickness of the electronic device can be thinned.

[0143] Among them, in the embodiments of the present application, in order to eliminate the combined chromatic aberration, the Abbe numbers of the first lens 211 and the fourth lens 214 are less than 30, and the Abbe numbers of the second lens 212, the third lens 213, and the fifth lens 215 are greater than 40. For example, the Abbe numbers of the first lens 211, the second lens 212, the third lens 213, the fourth lens 214, and the fifth lens 215 can be 19.51, 55.764, 55.865, 20.402, and 55.764 respectively. In the embodiments of the present application, the conditions for the first lens 211, the second lens 212, the third lens 213, the fourth lens 214, and the fifth lens 215 to achromatize are:

[0144]

[0145] Among them, is the height of the parallel incident light on the lens, is the Abbe number, is the optical power. Therefore, in the embodiments of the present application, the optical powers of the respective lenses are allocated according to the refractive index and the Abbe number, such that During allocation, increase the proportion of the optical power of the first lens 211 and the fourth lens 214, which can increase the beam deflection ability of the lens group, shorten the height of the camera, eliminate the chromatic aberration, and make the lateral chromatic aberration (LCA) less than 1 μm and the longitudinal chromatic aberration (LoCA) < 5 μm.

[0146] In some other examples, the above lens 21 can also be used as the lens of the rear camera. For example, the electronic device may further include: a rear camera, which may include the above lens 21, a bracket 24, a photosensitive element 25, and a flexible board 26. The rear camera may be disposed on the side of the metal middle plate 32 facing the rear cover 60. The lens 21 of the rear camera faces the rear cover 60. An opening is formed on the rear cover 60, and the head of the lens 21 is mounted in the opening formed on the rear cover 60. In the embodiment of the present application, since the size of the head of the lens 21 is reduced, the opening formed on the rear cover 60 is reduced, making the appearance of the rear cover 60 more beautiful and the strength of the rear cover 60 better.

[0147] Scenario Two

[0148] In the embodiment of the present application, the first lens 211 in the lens group is a glass lens, and the second lens 212, the third lens 213, the fourth lens 214, and the fifth lens 215 are plastic lenses made of resin materials. The first lens 211 has a positive optical power, and the fourth lens 214 has a negative optical power. Among them, the refractive indices of the first lens 211 and the fourth lens 214 are greater than 1.6, and the refractive indices of the second lens 212, the third lens 213, and the fifth lens 215 are less than 1.55. For example, the refractive indices of the first lens 211, the second lens 212, the third lens 213, the fourth lens 214, and the fifth lens 215 may be 1.7147, 1.535, 1.5446, 1.66, and 1.535 respectively. This can increase the beam deflection ability of the lens group. It is found through testing that the distance between the surface of the first lens 211 facing the object side and the imaging surface of the photosensitive element 24 on the optical axis is shortened by 0.2 mm. Therefore, in the embodiment of the present application, by using a glass lens with a high refractive index for the first lens 211 and a plastic lens with a high refractive index for the fourth lens 214, the first lens 211 has a positive optical power, and the fourth lens 214 has a negative optical power, the distance between the first lens 211 and the photosensitive element 24 is shortened, and the height of the formed front camera is reduced. When applied to an electronic device, the thickness of the electronic device can be thinned.

[0149] Among them, in the embodiments of the present application, when the first lens 211 is a glass lens, the two surfaces of the first lens 211 can be spherical surfaces, which reduces the processing difficulty and manufacturing cost of the glass lens. Of course, when the first lens 211 is a glass lens, the glass lens can also be an aspherical surface design.

[0150] Among them, in the embodiments of the present application, in order to eliminate the combined chromatic aberration, the dispersion coefficients of the first lens 211 and the fourth lens 214 are less than 30, and the dispersion coefficients of the second lens 212, the third lens 213, and the fifth lens 215 are greater than 40. For example, the dispersion coefficients of the first lens 211, the second lens 212, the third lens 213, the fourth lens 214, and the fifth lens 215 can be: 29.51, 55.764, 55.865, 20.402, 55.764 respectively. In the embodiments of the present application, the conditions for the first lens 211, the second lens 212, the third lens 213, the fourth lens 214, and the fifth lens 215 to achromatize are:

[0151]

[0152] Among them, is the height of the parallel incident light ray on the lens, is the dispersion coefficient, is the optical power. Therefore, in the embodiments of the present application, the optical powers of the respective lenses are allocated according to the refractive index and the dispersion coefficient, so that . During the allocation, the proportion of the optical powers of the first lens 211 and the fourth lens 214 is increased, which can increase the beam folding ability of the lens group, shorten the height of the camera, eliminate the combined chromatic aberration, and make the lateral chromatic aberration (LCA) less than 1 μm and the longitudinal chromatic aberration (LoCA) < 5 μm.

[0153] Scenario three

[0154] In the embodiments of the present application, as Figure 16 shown, the lens group includes 6 lenses, namely: the first lens 211, the second lens 212, the third lens 213, the fourth lens 214, the fifth lens 215, and the sixth lens 216. The surfaces of the sixth lens 216 facing the image side and the object side can be aspherical surfaces. The first lens 211, the second lens 212, the third lens 213, the fourth lens 214, the fifth lens 215, and the sixth lens 216 can be plastic lenses made of resin materials. Of course, the first lens 211 can also be a glass lens.

[0155] In order to reduce the height of the front camera, in the application embodiment, the refractive indices of the first lens 211, the third lens 213, and the fifth lens 215 are greater than 1.6. The first lens 211 has a positive optical power, the third lens 213 has a negative optical power, and the fifth lens 215 has a positive optical power. The refractive indices of the second lens 212, the fourth lens 214, and the sixth lens 216 are less than 1.55. For example, the refractive indices of the first lens 211, the second lens 212, the third lens 213, the fourth lens 214, the fifth lens 215, and the sixth lens 216 can be 1.6688, 1.535, 1.66, 1.5445, 1.66, and 1.535 respectively. This can increase the beam folding ability of the lens group. It is found through testing that as Figure 16 shown, the imaging position moves from the photosensitive element 24 shown by the dashed line in Figure 16 to the photosensitive element 24 shown by the solid line. The distance between the surface of the first lens 211 facing the object side and the imaging surface of the photosensitive element 24 on the optical axis is reduced from H4 to H3, shortening by 0.2 mm (i.e., H4 - H3 = 0.2 mm). Therefore, in the application embodiment of the present application, by using plastic lenses with high refractive indices for the first lens 211, the third lens 213, and the fifth lens 215, where the first lens 211 has a positive optical power, the third lens 213 has a negative optical power, and the fifth lens 215 has a positive optical power, the distance between the first lens 211 and the photosensitive element 24 is shortened. In this way, the height of the formed front camera is reduced, and when applied to an electronic device, the thickness of the electronic device can be thinned.

[0156] In the application embodiment of the present application, in order to eliminate the combined chromatic aberration, the Abbe numbers of the first lens 211, the third lens 213, and the fifth lens 215 are less than 30, and the Abbe numbers of the second lens 212, the fourth lens 214, and the sixth lens 216 are greater than 40. For example, the Abbe numbers of the first lens 211, the second lens 212, the third lens 213, the fourth lens 214, and the fifth lens 215 can be 19.453, 55.764, 20.402, 55.987, 20.402, and 55.764 respectively. In the application embodiment of the present application, the conditions for achromatism of the first lens 211, the second lens 212, the third lens 213, the fourth lens 214, the fifth lens 215, and the sixth lens 216 are:

[0157]

[0158] Among them, is the height of the parallel incident light ray on the lens, is the Abbe number, is the optical power. Therefore, in the application embodiment of the present application, the optical powers of the respective lenses are allocated according to the refractive index and the Abbe number, such that During distribution, the proportion of the optical power of the first lens 211, the third lens 213, and the fifth lens 215 is increased, which can increase the beam turning ability of the lens group, shorten the height of the camera, eliminate the overall chromatic aberration, and make the lateral chromatic aberration (LCA) less than 1 μm and the longitudinal chromatic aberration (LoCA) < 5 μm.

[0159] In the description of the embodiments of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "mounted", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection or an indirect connection through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0160] The terms "first", "second", "third", "fourth", etc. (if any) in the description of the embodiments of the present application, the claims, and the above drawings are used to distinguish similar objects and do not necessarily need to describe a specific order or sequence.

[0161] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the embodiments of the present application and are not intended to limit them. Although the technical solutions of the present application have been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An electronic device, characterized in that, it includes: a display screen, a middle frame, a rear cover and at least one camera, the display screen and the rear cover are located on both sides of the middle frame, the camera is arranged on the middle frame and one end of the camera faces the display screen; the camera at least includes: a lens, a bracket, a photosensitive element and a flexible board, the bracket is located between the lens and the flexible board, and the photosensitive element is located at one end of the flexible board opposite to the lens; an opening is formed on the display screen, and one end of the lens facing the object side extends into the opening; the lens includes: a lens barrel and a lens group arranged in the lens barrel, and one end of the lens barrel facing the object side has a shoulder; the lens in the lens group close to the object side has a convex surface, and the convex surface protrudes from the shoulder; the lens group at least includes: a first lens, a second lens, a third lens, a fourth lens and a fifth lens, the first lens is close to the object side, the fifth lens is close to the image side, and the convex surface is located on one side of the first lens facing the object side; the first lens has a positive optical power, and the fourth lens has a negative optical power; the dispersion coefficients of the first lens and the fourth lens are less than 30, and the dispersion coefficients of the second lens, the third lens and the fifth lens are greater than 40; or, the lens group at least includes: a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens, the first lens is close to the object side, the sixth lens is close to the image side, and the convex surface is located on one side of the first lens facing the object side; the first lens has a positive optical power, the third lens has a negative optical power, and the fifth lens has a positive optical power; the dispersion coefficients of the first lens, the third lens and the fifth lens are less than 30, and the dispersion coefficients of the second lens, the fourth lens and the sixth lens are greater than 40.

2. The electronic device according to claim 1, characterized in that, the maximum distance that the convex surface protrudes from the shoulder is greater than or equal to 0.3 mm.

3. The electronic device according to claim 1 or 2, characterized in that, the lens in the lens group close to the object side includes: an effective diameter region and a non-effective diameter region, the non-effective diameter region surrounds the outer edge of the effective diameter region, and the side of the effective diameter region facing the object side is the convex surface; the ratio of the central thickness of the effective diameter region to the thickness of the non-effective diameter region is 2.5 to 3.

5.

4. The electronic device according to claim 3, characterized in that, the ratio of the diameter of the effective diameter region to the central thickness of the effective diameter region is greater than 3.

5. The electronic device according to any one of claims 1-4, characterized in that, the wall thickness at the top end of the lens barrel is 0.1-0.25 mm.

6. The electronic device according to any one of claims 1-5, characterized in that, the first lens and the fourth lens are plastic lenses with a refractive index greater than 1.6, and the second lens, the third lens and the fifth lens are plastic lenses with a refractive index less than 1.

55.

7. The electronic device according to any one of claims 1-6, It is characterized in that the first lens is a plastic lens made of resin material, and the melt index of the resin material is greater than 20 g / 10 min.

8. The electronic device according to any one of claims 1-5, It is characterized in that the first lens is a glass lens with a refractive index greater than 1.6, the fourth lens is a plastic lens with a refractive index greater than 1.6, and the second lens, the third lens and the fifth lens are plastic lenses with a refractive index less than 1.

55.

9. The electronic device according to any one of claims 1-5, It is characterized in that the first lens, the third lens and the fifth lens are plastic lenses with a refractive index greater than 1.6, and the second lens, the fourth lens and the sixth lens are plastic lenses with a refractive index less than 1.

55.

10. The electronic device according to any one of claims 1-5, It is characterized in that the first lens is a glass lens with a refractive index greater than 1.6, the third lens and the fifth lens are plastic lenses with a refractive index greater than 1.6, and the second lens, the fourth lens and the sixth lens are plastic lenses with a refractive index less than 1.

55.

11. The electronic device according to any one of claims 1-10, It is characterized in that further comprising: a protection structure: the protection structure is provided on the shoulder, and one end of the protection structure extends to one end of the convex surface close to the shoulder.

12. The electronic device according to any one of claims 1-11, It is characterized in that the display screen includes: a transparent protection cover plate and a display module, and an opening is provided at a position corresponding to the lens in the display module.

13. The electronic device according to claim 12, It is characterized in that the display module is an organic light emitting diode (OLED) display module, or the display module is a liquid crystal display module; the liquid crystal display module includes a liquid crystal panel and a backlight element, the liquid crystal panel is located between the lens protection cover plate and the backlight element, and an opening is provided on the backlight element, or openings communicating with each other are provided on both the backlight element and the liquid crystal panel.

14. A lens, It is characterized in that comprising: a lens barrel and a lens group provided in the lens barrel, and one end of the lens barrel facing the object side has a shoulder; the lens in the lens group close to the object side has a convex surface, and the convex surface protrudes from the shoulder; the lens group at least includes: a first lens, a second lens, a third lens, a fourth lens and a fifth lens, the first lens is close to the object side, the fifth lens is close to the image side, and the convex surface is located on one side of the first lens facing the object side; the first lens has a positive optical power, and the fourth lens has a negative optical power; the dispersion coefficients of the first lens and the fourth lens are less than 30, and the dispersion coefficients of the second lens, the third lens and the fifth lens are greater than 40; or, the lens group at least includes: a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens, the first lens is close to the object side, the sixth lens is close to the image side, and the convex surface is located on one side of the first lens facing the object side; The first lens has a positive optical power, the third lens has a negative optical power, and the fifth lens has a positive optical power; the dispersion coefficients of the first lens, the third lens, and the fifth lens are less than 30, and the dispersion coefficients of the second lens, the fourth lens, and the sixth lens are greater than 40.

15. The lens according to claim 14, wherein, the maximum distance by which the convex surface protrudes from the shoulder is greater than or equal to 0.3 mm.

16. The lens according to claim 14 or 15, wherein, the lens on the object side in the lens group includes: an effective diameter region and a non-effective diameter region, the non-effective diameter region surrounds the outer edge of the effective diameter region, and the surface of the effective diameter region facing the object side is the convex surface; the ratio of the central thickness of the effective diameter region to the thickness of the non-effective diameter region is 2.5 to 3.

5.

17. The lens according to claim 16, wherein, the ratio of the diameter of the effective diameter region to the central thickness of the effective diameter region is greater than 3.

18. The lens according to any one of claims 14-17, wherein, the wall thickness at the top end of the lens barrel is 0.1-0.25 mm.

19. The lens according to any one of claims 14-18, wherein, the first lens and the fourth lens are plastic lenses with a refractive index greater than 1.6, and the second lens, the third lens, and the fifth lens are plastic lenses with a refractive index less than 1.

55.

20. The lens according to any one of claims 14-19, wherein, the first lens is a plastic lens made of a resin material, and the melt index of the resin material is greater than 20 g / 10 min.

21. The lens according to any one of claims 14-18, wherein, the first lens is a glass lens with a refractive index greater than 1.6, the fourth lens is a plastic lens with a refractive index greater than 1.6, and the second lens, the third lens, and the fifth lens are plastic lenses with a refractive index less than 1.

55.

22. The lens according to any one of claims 14-18, wherein, the first lens, the third lens, and the fifth lens are plastic lenses with a refractive index greater than 1.6, and the second lens, the fourth lens, and the sixth lens are plastic lenses with a refractive index less than 1.

55.

23. The lens according to any one of claims 14-18, wherein, the first lens is a glass lens with a refractive index greater than 1.6, the third lens and the fifth lens are plastic lenses with a refractive index greater than 1.6, and the second lens, the fourth lens, and the sixth lens are plastic lenses with a refractive index less than 1.

55.

24. The lens according to any one of claims 14-23, wherein, further comprising: a protection structure: the protection structure is provided on the shoulder, and one end of the protection structure extends to one end of the convex surface close to the shoulder.

25. A camera, wherein, At least including: the lens, bracket, photosensitive element and flexible board described in any one of claims 14-24 above, the bracket is located between the lens and the flexible board, and the photosensitive element is located at one end of the flexible board opposite to the lens.

26. The camera according to claim 25, wherein, the camera is a front camera, or the camera is a rear camera.

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