Glued prism group, camera module and electronic equipment

Abstract

The invention relates to a cemented prism group, a camera module and electronic equipment. The cemented prism group comprises a first prism, a second prism, a third prism, a first diaphragm and a second diaphragm, and the first diaphragm and the second diaphragm are respectively enclosed to form a first light-transmitting area and a second light-transmitting area; the first diaphragm is clamped between the first gluing face and the second gluing face, the first light-transmitting area is filled with a first glue material so that the first gluing face and the second gluing face can be glued, the second diaphragm is clamped between the third gluing face and the fourth gluing face, and the third gluing face and the fourth gluing face are glued through the second glue material. An air layer is formed between the third gluing surface and the fourth gluing surface at a position interval corresponding to the second light-transmitting area, and the gluing prism group, the camera module and the electronic equipment can reduce stray light entering an image sensor so as to be beneficial to improving the imaging quality.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of camera devices, in particular to a glued prism group, a camera module and an electronic device. BACKGROUND

[0002] With the development of mobile phone images, consumers have higher and higher requirements for the photo and video quality of mobile phone shooting, especially for long-range shooting. The longer the focal length of the long-focus module required for long-range shooting, the larger the size of the module (especially the height dimension), which is contradictory to the thinness of the whole machine.

[0003] In order to reduce the height dimension of the long-focus module, a right-angle prism is usually added to the periscope module to deflect the light path. Compared with the conventional vertical module scheme, the right-angle prism of the periscope module only deflects the optical axis by 90°, and converts the light path direction from the module height direction to the module length direction.

[0004] In related technologies, a trapezoidal prism is used to deflect the light path more than twice to increase the propagation path of light between the lens and the image sensor. However, such a setting can easily introduce stray light into the image sensor, which can adversely affect the imaging quality. SUMMARY

[0005] Embodiments of the present application provide a glued prism group, a camera module and an electronic device to solve the problem of how to improve the imaging quality.

[0006] In one aspect, the present application provides a glued prism group, comprising:

[0007] a first prism comprising an incident light surface, a first inclined surface and a first glued surface, the first inclined surface and the first glued surface are arranged opposite to each other and are arranged at an acute angle with the incident light surface;

[0008] a second prism comprising a second glued surface, a bottom surface and a third glued surface, the second glued surface and the third glued surface are arranged opposite to each other and are arranged at an acute angle with the bottom surface;

[0009] a third prism comprising a fourth glued surface, an exit light surface and a second inclined surface, the fourth glued surface and the second inclined surface are arranged opposite to each other and are arranged at an acute angle with the exit light surface, the third prism is connected between the first prism and the second prism, and the incident light surface and the exit light surface are arranged opposite to the bottom surface; and

[0010] The first diaphragm and the second diaphragm each enclose a first light transmission area and a second light transmission area, respectively; wherein the first diaphragm is arranged between the first bonding surface and the second bonding surface, and the first light transmission area is filled with a first adhesive material, so that the first bonding surface and the second bonding surface are bonded together; the second diaphragm is arranged between the third bonding surface and the fourth bonding surface, and the third bonding surface and the fourth bonding surface are bonded together by a second adhesive material; the third bonding surface and the fourth bonding surface are spaced apart to form an air layer corresponding to the position of the second light transmission area; the bonded prism group is configured to enable at least part of the light rays incident on the first prism from the light entrance surface to sequentially pass through the first prism, the first adhesive material, the second prism, the air layer and the third prism, and be emitted from the light exit surface.

[0011] In another aspect, the application provides a camera module, which comprises a lens, an image sensor and a bonded prism group as described above, the lens corresponding to the light entrance surface, the image sensor corresponding to the light exit surface, and part of the light rays collected by the lens can enter the first prism from the light entrance surface of the first prism and be emitted from the light exit surface of the third prism to the image sensor.

[0012] In another aspect, the application provides an electronic device comprising a camera module as described above.

[0013] The bonded prism group, the camera module and the electronic device described above, by arranging a first diaphragm between the first prism and the second prism, filling the first light transmission area enclosed by the first diaphragm with a first adhesive material to bond the first prism and the second prism with the first adhesive material, arranging a second diaphragm between the second prism and the third prism, and bonding the second prism and the third prism with a second adhesive material, so that the second prism and the third prism form an air layer corresponding to the second light transmission area enclosed by the second diaphragm, based on this, the bonded prism group is configured to enable at least part of the light rays incident on the first prism from the light entrance surface to sequentially pass through the first prism, the first adhesive material, the second prism, the air layer and the third prism, and be emitted from the light exit surface, so that the light rays pass through the structures such as the first diaphragm, the second diaphragm and the air layer on the propagation path in the bonded prism group, to reduce the stray light emitted from the light exit surface, and thus the image sensor is arranged corresponding to the light exit surface, and the stray light in the light rays processed by the bonded prism group and finally entering the image sensor is less, which is conducive to improving the imaging quality. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description only constitute some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0015] Figure 1 It is a rear view schematic diagram of an electronic device in an embodiment.

[0016] Figure 2 It is a light path schematic diagram of a camera module in an embodiment.

[0017] Figure 3 It is an exploded structure schematic diagram of a first prism, a second prism and a third prism in a cemented prism group of a camera module in an embodiment.

[0018] Figure 4 It is a combination structure schematic diagram of a cemented prism group of a camera module in another embodiment.

[0019] Figure 5 It is a structure schematic diagram of a first diaphragm in a cemented prism group of a camera module in an embodiment.

[0020] Figure 6 It is another structure schematic diagram of a first diaphragm in a cemented prism group of a camera module in an embodiment.

[0021] Figure 7 It is still another structure schematic diagram of a first diaphragm in a cemented prism group of a camera module in an embodiment.

[0022] Figure 8 It is a light path schematic diagram of a cemented prism group of a camera module in an embodiment, which eliminates one of the stray light beams.

[0023] Figure 9 It is a structure schematic diagram of a cemented prism group of a camera module in another embodiment.

[0024] Figure 10 It is a structure schematic diagram of a cemented prism group of a camera module in still another embodiment.

[0025] Figure 11 It is a structure schematic diagram of a cemented prism group of a camera module in yet another embodiment.

[0026] Figure 12 It is Figure 11 It is a light path schematic diagram of a cemented prism group of a camera module, which eliminates one of the stray light beams.

[0027] Figure 13Structural schematic diagram of a third adhesive material on a glued prism group of a camera module in an embodiment.

[0028] Figure 14 Structural schematic diagram of a glued prism group of another embodiment.

[0029] Figure 15 Structural schematic diagram of a glued prism group of still another embodiment.

[0030] Figure 16 Structural schematic diagram of a fourth adhesive material on a glued prism group of a camera module in an embodiment.

[0031] Figure 17 Structural schematic diagram of a glued prism group of a camera module in yet another embodiment.

[0032] Figure 18 Structural schematic diagram of an electronic device in an embodiment.

[0033] FIG. 10 is a structural schematic diagram of an electronic device in an embodiment. DETAILED DESCRIPTION

[0034] For the purpose of facilitating the understanding of the present application, a more complete appreciation of the present application will be had by reference to the following detailed description and the accompanying drawings, in which the preferred embodiments of the present application are shown. However, the present application can be realized in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the present application to those skilled in the art.

[0035] As used herein, "electronic device" refers to a device capable of receiving and / or transmitting communication signals, including but not limited to any one or more of the following connection means:

[0036] (1) via wired connection means, such as via Public Switched Telephone Networks (PSTN), Digital Subscriber Line (DSL), digital cable, direct cable connection;

[0037] (2) via wireless interface means, such as cellular network, Wireless Local Area Network (WLAN), digital television network such as DVB-H network, satellite network, AM-FM broadcast transmitter.

[0038] Electronic devices configured to communicate through wireless interfaces can be referred to as "mobile terminals". Examples of mobile terminals include but are not limited to the following electronic devices:

[0039] (1) satellite phone or cellular phone;

[0040] (2) Personal Communications System (PCS) terminal that can combine cellular radio telephone with data processing, facsimile, and data communications capabilities;

[0041] (3) radio telephone, pager, Internet / Intranet access, Web browser, notepad, calendar, Personal Digital Assistant (PDA) equipped with Global Positioning System (GPS) receiver;

[0042] (4) conventional laptop and / or palmtop receiver;

[0043] (5) conventional laptop and / or palmtop radio telephone transceiver, etc.

[0044] Please refer to Figure 1 As shown in FIG. 1, the electronic device 10 includes a housing 11, and elements such as a camera module 20, a mainboard (not shown in the figure), and a battery (not shown in the figure) are arranged in a space enclosed by the housing 11. The mainboard can integrate a processor, a power management module, a storage unit, and a baseband chip of the electronic device 10. It can be understood that the electronic device 10 of the embodiments of the present application includes but is not limited to a terminal device such as a mobile phone, a tablet computer, or other portable electronic device 10.

[0045] In some embodiments, the shell 11 is provided with a light-transmitting portion 111, which can be a light inlet hole penetrating through the shell 11, or a structural member made of glass or light-transmitting plastic, etc. Taking the shell 11 provided with the light inlet hole as an example, the camera module 20 is arranged in the space enclosed by the shell 11, and the lens 21 of the camera module 20 is arranged corresponding to the light inlet hole, so that the light outside the electronic device 10 can enter the lens 21 to meet the needs of the camera module 20 for imaging.

[0046] In combination Figure 2 As shown in FIG. 2, the camera module 20 includes a lens 201, an image sensor 202, and a glued prism group 203. The image sensor 202 is arranged spaced apart from the lens 201, and the lens 201 and the image sensor 202 are located on the same side of the glued prism group 203. The glued prism group 203 is used to deflect the light collected by the lens 201 to the image sensor 202.

[0047] The image sensor 202 includes, but is not limited to, a Charge Coupled Device (CCD) or a Complementary Metal-Oxide Semiconductor Sensor (CMOS Sensor).

[0048] In some embodiments, the camera module 20 further includes a light filtering element 204, which is arranged in the light path of the light emitted by the glued prism group 203 to the image sensor 202. The light filtering element 204 is used to filter out the interference light emitted from the glued prism group 203, to prevent the interference light from being incident on the image sensor 202 and affecting normal imaging. In an embodiment, the light filtering element 204 can be an infrared cut-off filter.

[0049] In combination Figure 3 and Figure 4 As shown in FIG. 3, the glued prism group 203 includes a first prism 231, a second prism 232, a third prism 233, a first diaphragm 234, and a second diaphragm 235. The first prism 231, the second prism 232, and the third prism 233 can each be a triangular prism or a trapezoidal prism. The type of each prism is not limited herein. For example, in some embodiments, the first prism 231 and the third prism 233 are both triangular prisms, and the second prism 232 is a trapezoidal prism. In other embodiments, the first prism 231 and the second prism 232 are both trapezoidal prisms, and the third prism 233 is a triangular prism. It should be noted that the triangular prism refers to a prism with a triangular end face, and the trapezoidal prism refers to a prism with a trapezoidal end face.

[0050] The first prism 231 comprises an incident surface 231a, a first inclined surface 231b and a first bonding surface 231c. The incident surface 231a and the first bonding surface 231c are oppositely arranged and each forms an acute angle with the first inclined surface 231b.

[0051] The second prism 232 comprises a second bonding surface 232a, a bottom surface 232b and a third bonding surface 232c. The second bonding surface 232a and the third bonding surface 232c are oppositely arranged and each forms an acute angle with the bottom surface 232b.

[0052] The third prism 233 comprises a fourth bonding surface 233a, an emergent surface 233b and a second inclined surface 233c. The fourth bonding surface 233a and the second inclined surface 233c are oppositely arranged and each forms an acute angle with the emergent surface 233b. The incident surface 231a and the emergent surface 233b are oppositely arranged with the bottom surface 232b, so that the first inclined surface 231b and the second inclined surface 233c are opposite to each other and each is outwardly inclined with respect to the bottom surface 232b, that is, both the first inclined surface 231b and the second inclined surface 233c have one end adjacent to the bottom surface 232b and the other end arranged away from each other, so that the first prism 231, the second prism 232 and the third prism 233 are integrally bonded to form a prism body with a trapezoidal side face.

[0053] The first light barrier 234 and the second light barrier 235 each enclose a first light transmission area 2341 and a second light transmission area 2351, respectively. The specific shape of the first light barrier 234 and the second light barrier 235 is not limited herein, as long as the first light barrier 234 and the second light barrier 235 are arranged at the bonding positions between different prisms of the bonded prism group 203, and can eliminate at least part of the stray light on the light transmission path, so as to reduce the stray light emitted from the emergent surface 233b, and then reduce the probability of the stray light entering the image sensor 202 arranged opposite to the emergent surface 233b, so as to improve the imaging quality. For example, taking the first light barrier 234 as an example, as shown in FIG. 2B, in some embodiments, the first light barrier 234 can be substantially enclosed as a square ring, that is, the inner edge and the outer edge are both rectangular, and at this time, the first light transmission area 2341 enclosed by the inner edge of the first light barrier 234 is substantially rectangular. Figure 5 Figure 6 As shown in FIG. 2C, in some embodiments, the inner edge of the first light barrier 234 is circular, and the outer edge is rectangular, and the first light transmission area 2341 is a circular area enclosed by the inner edge of the first light barrier 234. Figure 7 As shown in FIG. 2D, in another embodiment, the inner edge of the first light barrier 234 is elliptical, and the outer edge is rectangular, and the first light transmission area 2341 is an elliptical area enclosed by the inner edge of the first light barrier 234.

[0054] ​It should be noted that the outer edge of the first light barrier 234 can be partially or completely coincident with the edge profile of the first bonding surface 231c.

[0055] Similarly, the shape of the second light barrier 234 is set. In some embodiments, the shape of the second light transmission area 2351 enclosed by the second light barrier 235 can be a circle, a rectangle or an ellipse, which will not be described here.

[0056] In the embodiments of the present application, the first light barrier 234 is sandwiched between the first bonding surface 231c and the second bonding surface 232a, and the first light transmission area 2341 is filled with the first adhesive 237, so that the first bonding surface 231c and the second bonding surface 232a are bonded together. The second light barrier 235 is sandwiched between the third bonding surface 232c and the fourth bonding surface 233a, and the third bonding surface 232c and the fourth bonding surface 233a are bonded together by the second adhesive 238. The third bonding surface 232c and the fourth bonding surface 233a are spaced apart by an air layer 2352 corresponding to the position of the second light transmission area 2351. The bonded prism group 203 is configured to enable at least part of the light rays incident on the first prism 231 from the light entrance surface 231a to pass through the first prism 231, the first adhesive 237, the second prism 232, the air layer 2352 and the third prism 233 in turn, and be emitted from the light exit surface 233b.

[0057] The structure and size of the first light barrier 234 and the second light barrier 235 have many possibilities. Taking the first light barrier 234 as an example, the first light barrier 234 can be formed by coating the first bonding surface 231c with a neutral density (ND) film. In some embodiments, the material of the first light barrier 234 can also be a metal sheet or a plastic sheet. In this embodiment, the first light barrier 234 can be adhered to the first bonding surface 231c by glue. It should be noted that the light transmittance of the first light barrier 234 is less than or equal to 5%, so as to have a good shielding or absorption effect on light. In some embodiments, the thickness of the first light barrier 234 can be 0.5mm to 1mm, for example, 0.5mm, 0.7mm or 1mm. If the first light barrier 234 is too thin, it can cause edge diffraction or structural deformation, and if it is too thick, it can increase stray light due to internal wall reflection. For the visible light band (400nm-700nm), the thickness of the first light barrier 234 is set to 0.5mm to 1mm, which can balance the diffraction suppression and stray light reflection control.

[0058] Correspondingly, in some embodiments, the second light barrier 235 can adopt the same material or size as the first light barrier 234, which will not be described here.

[0059] It should be noted that in the camera module 20, the lens 201 corresponds to the light entrance surface 231a, the image sensor 202 corresponds to the light exit surface 233b, and part of the light collected by the lens 201 can enter the first prism 231 from the light entrance surface 231a of the first prism 231 and exit the image sensor 202 from the light exit surface 233b of the third prism 233. Since the first light-tight region 2341 enclosed by the first light barrier 234 is filled with the first adhesive 237, the first prism 231 and the second prism 232 are glued together by the first adhesive 237, and the second light barrier 235 is arranged between the second prism 232 and the third prism 233. Since the second adhesive 238 glues the second prism 232 and the third prism 233 together, the second prism 232 and the third prism 233 form an air layer 2352 in the second light-tight region 2351 corresponding to the second light barrier 235. Therefore, the glued prism group 203 is configured to enable at least part of the light incident on the first prism 231 from the light entrance surface 231a to pass through the first prism 231, the first adhesive 237, the second prism 232, the air layer 2352, and the third prism 233 in turn, and exit from the light exit surface 233b. This can make the light propagate through the structures such as the first light barrier 234, the second light barrier 235, and the air layer 2352 on the propagation path in the glued prism group 203, so as to reduce the stray light exiting from the light exit surface 233b. Thus, when the image sensor 202 is arranged corresponding to the light exit surface 233b, the stray light in the light processed by the glued prism group 203 and finally entering the image sensor 202 is less, so as to improve the imaging quality.

[0060] In some embodiments, the material refractive index difference value of the first prism 231, the second prism 232, and the third prism 233 is less than or equal to 0.1, and the material refractive index difference value of the first prism 231 and the second prism 232 relative to the first adhesive 237 is less than or equal to 0.05.

[0061] In combination Figure 8 As shown, the material refractive index difference value of the first prism 231 and the second prism 232 relative to the first adhesive 237 is small, so that when the light passes from the first prism 231 to the second prism 232 through the first adhesive 237, the light is not easily deflected, so that the light including part of the stray light can enter the air layer 2352. The refractive index of the air layer 2352 is close to 1, and there is a large refractive index difference between the air layer 2352 and the second prism 232 and the third prism 233, so as to effectively reduce the total reflection critical angle of the stray light on the interface between the second prism 232 and the air layer 2352 (i.e., the third gluing surface 232c), so as to increase the probability of total reflection of the stray light, so that the stray light is not easily entered into the image sensor 202, so as to further improve the imaging quality.

[0062] In some embodiments, the third bonding surface 232c and the fourth bonding surface 233a correspond to positions forming the air layer 2352 and are spaced apart from each other by a distance of 35 μm to 125 μm, for example, 35 μm, 45 μm, 50 μm, 55 μm, 65 μm, 75 μm, 85 μm, 95 μm, 115 μm, or 125 μm. Within this size range, the second prism 232 and the third prism 233 are compactly fitted to facilitate the miniaturization of the bonded prism group 203 and have a sufficient bonding thickness to improve the adhesion of the second adhesive 238, thereby enhancing the bonding and fixing between the second prism 232 and the third prism 233. Moreover, within this size range, the distance between the second prism 232 and the third prism 233 is small to facilitate an increase in the amount of light entering the third prism 233 from the second prism 232, thereby improving light utilization and enhancing imaging brightness.

[0063] In combination Figure 9 As shown in some embodiments, the light entrance surface 231a is provided with a light entrance region 23a, the first inclined surface 231b is provided with a first reflection region 23b, the second inclined surface 233c is provided with a second reflection region 23c, and the light exit surface 233b is provided with a light exit region 23d. At least part of the light entering the light entrance region 23a can be reflected by the first reflection region 23b and the second reflection region 23c in sequence and exit from the light exit region 23d. In this embodiment, the light is reflected by the first reflection region 23b and the second reflection region 23c twice and then exits from the light exit region 23d, thereby achieving a deflection of 180° of the light path between the lens 201 and the image sensor 202 and realizing periscopic imaging to facilitate the reduction of the stacking height on the optical axis of the lens 201 while meeting the long-focus shooting requirement.

[0064] In some embodiments, the bonded prism group 203 can reflect the light exiting from the lens 201 three times, five times, or seven times, etc., and then enter the image sensor 202. For example, as shown in Figure 2 and Figure 10 In some embodiments, the bonded prism group 203 can reflect the light exiting from the lens 201 five times and then enter the image sensor 202.

[0065] In some embodiments, the light entrance surface 231a is provided with a light entrance area 23a, the first inclined surface 231b is provided with a first light reflection area 2301, the light entrance surface 231a is provided with a second light reflection area 2302 partially overlapping the light entrance area 23a, the bottom surface 232b is provided with a third light reflection area 2303, the light exit surface 233b is provided with a fourth light reflection area 2304, the second inclined surface 233c is provided with a fifth light reflection area 2305, and the light exit surface 233b is provided with a light exit area 23d partially overlapping the fourth light reflection area 2304. At least part of the light rays incident at the light entrance area 23a can be reflected by the first light reflection area 2301, the second light reflection area 2302, the third light reflection area 2303, the fourth light reflection area 2304, and the fifth light reflection area 2305 in sequence, and exit from the light exit area 23d. With such a structure, the glued prism group 203 can reflect the light path five times, thereby effectively increasing the length of the propagation path of the light rays in the glued prism group 203, i.e., increasing the total focal length between the lens 201 and the image sensor 202, to achieve the effect of improving long-focus shooting performance.

[0066] It should be noted that the light entrance area 23a partially overlaps the second light reflection area 2302, and the fourth light reflection area 2304 partially overlaps the light exit area 23d, which can reduce the overall size of the glued prism group 203, facilitating miniaturization. In other embodiments, the light entrance area 23a can not overlap the second light reflection area 2302, and the fourth light reflection area 2304 can not overlap the light exit area 23d.

[0067] In combination with FIGS. 2A and 2B, Figure 11 and Figure 12 As shown in FIGS. 2A and 2B, the second prism 232 further includes a top surface 232d opposite the bottom surface 232b, and the glued prism group 203 further includes a first light shield 239 disposed on the top surface 232d, and part of the structure of the first light shield 239 covers the second light reflection area 2302 and / or the fourth light reflection area 2304. In this embodiment, the first light shield 239 absorbs stray light exiting from the first light reflection area 2301 and / or the fourth light reflection area 2304, or avoids the exiting stray light from being reflected by structures such as the mounting shell 20a or the driving mechanism outside the glued prism group 203 and re-entering the glued prism group 203, thereby further improving the effect of eliminating stray light and improving imaging quality.

[0068] Further, the first light-shield 239 is spaced apart from the light-in surface 231a, i.e. the first light-shield 239 is not in contact with the light-in surface 231a, so that the first light-shield 239 keeps a gap with the second reflective region 2302 on the light-in surface 231a. In this way, when the light rays are incident on the second reflective region 2302 from the first prism 231, the total reflection condition requirement of light from the denser medium to the rarer medium is still met, so that the light rays with an angle exceeding the critical angle can be totally reflected at the second reflective region 2302 without being absorbed by the first light-shield 239. Therefore, this structure of spacing the first light-shield 239 from the light-in surface 231a is conducive to maintaining the total reflection effect of the second reflective region 2302 when totally reflecting the light rays, ensuring that sufficient light quantity enters the image sensor 202, thereby improving the imaging brightness.

[0069] The first light-shield 239 is spaced apart from the light-out surface 233b, i.e. the first light-shield 239 is not in contact with the light-out surface 233b, so that the first light-shield 239 keeps a gap with the fourth reflective region 2304 on the light-out surface 233b. Therefore, when the light rays are incident on the fourth reflective region 2304 from the third prism 233, the total reflection condition requirement of light from the denser medium to the rarer medium is still met, so that the light rays with an angle exceeding the critical angle can be totally reflected at the fourth reflective region 2304 without being absorbed by the first light-shield 239. Thus, this structure of spacing the first light-shield 239 from the light-out surface 233b is conducive to maintaining the total reflection effect of the fourth reflective region 2304 when totally reflecting the light rays, ensuring that sufficient light quantity enters the image sensor 202, thereby improving the imaging brightness.

[0070] In combination with Figure 11 and Figure 13 As shown in FIG. 9, the light-in surface 231a, the top surface 232d and the light-out surface 233b are provided with a first glue area for setting a third glue material 240, and the third glue material 240 avoids the second reflective region 2302 and the fourth reflective region 2304, and the first light-shield 239 is bonded to the third glue material 240. The first light-shield 239 is spaced apart from the light-in surface 231a and the light-out surface 233b under the support of the third glue material 240, so that the first light-shield 239 keeps a gap with the light-in surface 231a and the light-out surface 233b, to maintain the total reflection effect of the second reflective region 2302 and the fourth reflective region 2304 on the light rays capable of being totally reflected, so as to facilitate sufficient light quantity entering the image sensor 202, thereby improving the imaging brightness.

[0071] In combination with Figure 14As shown, in some embodiments, the top surface 232d is higher than the light-in surface 231a, so that the first light-shield 239 is spaced apart from the light-in surface 231a. This arrangement of the top surface 232d being higher than the light-in surface 231a allows the first light-shield 239 to be spaced apart from the light-in surface 231a even if the first light-shield 239 is attached to the light-in surface 231a, thereby simplifying the connection structure between the first light-shield 239 and the top surface 232d. For example, it is only necessary to apply glue on the top surface 232d to bond the first light-shield 239, without having to worry about the glue avoiding the second reflective region 2302 and the fourth reflective region 2304.

[0072] Continuing to refer to Figure 14 As shown, the top surface 232d is higher than the light-out surface 233b, so that the first light-shield 239 is spaced apart from the light-out surface 233b. This arrangement of the top surface 232d being higher than the light-out surface 233b allows the first light-shield 239 to be spaced apart from the light-out surface 233b even if the first light-shield 239 is attached to the light-out surface 233b, thereby simplifying the connection structure between the first light-shield 239 and the top surface 232d.

[0073] In combination Figure 15 As shown, the glued prism group 203 further comprises a second light-shield 241, which is arranged on the bottom surface 232b, and part of the structure of the second light-shield 241 covers the third reflective region 2303. In this embodiment, the second light-shield 241 absorbs stray light emitted from the third reflective region 2303, or avoids the stray light emitted from the third reflective region 2303 from being reflected by structures such as a mounting shell or a driving mechanism outside the periphery of the glued prism group 203 and then entering the glued prism group 203 again from the third reflective region 2303, thereby further improving the effect of eliminating stray light and improving the imaging quality.

[0074] In combination Figure 16 As shown, the bottom surface 232b is provided with a second glue-coated area for arranging a fourth glue material 242, and the fourth glue material 242 avoids the third reflective region 2303, and the second light-shield 241 is bonded to the fourth glue material 242. The second light-shield 241 is spaced apart from the position of the corresponding third reflective region 2303 of the bottom surface 232b under the support of the fourth glue material 242, so that the second light-shield 241 is spaced apart from the third reflective region 2303, thereby maintaining the total reflection effect of the third reflective region 2303 on the light rays that can be totally reflected, so as to facilitate a sufficient amount of light to enter the image sensor 202, thereby improving the imaging brightness.

[0075] In combination Figure 17As shown, in some embodiments, the bottom surface 232b is provided with a groove 232e, the groove bottom wall is flat, the third light reflection area 2303 is located on the groove bottom wall, and the second light shielding sheet 241 is attached to the bottom surface 232b to be spaced apart from the groove bottom wall. This setting mode of providing the groove 232e on the bottom surface 232b enables the second light shielding sheet 241 to be spaced apart from the third light reflection area 2303 even if it is attached to the bottom surface 232b, thereby simplifying the connection structure between the second light shielding sheet 241 and the bottom surface 232b. For example, it is only necessary to smear glue on the part of the bottom surface 232b which is not provided with the groove 232e to bond the second light shielding sheet 241, without having to worry about the glue material avoiding the third light reflection area 2303.

[0076] It should be noted that the light entrance area 23a and the light exit area 23d in the present application can only need to adapt to the light transmission requirement, for example, the transmittance of the entrance area and the exit area is more than 95%. In some embodiments, an anti-reflection film can be provided corresponding to the light entrance area 23a and the light exit area 23d to enhance the light transmittance. For positions that need to meet the light reflection requirement, such as the first light reflection area 2301, the second light reflection area 2302 or the third light reflection area, a reflective film (for example, an anti-reflection film) can be provided to increase the reflectivity of the corresponding light reflection surface, thereby facilitating the improvement of the imaging quality of the camera module 20. The area of the light transmission element surface except the effective imaging light can be subjected to light shielding treatment to further reduce the occurrence of glare. The light shielding treatment mode includes but is not limited to silk-screened light shielding ink or plated light-absorbing film.

[0077] Reference Figure 18 , Figure 18 A structural schematic diagram of an electronic device 10 provided by an embodiment of the present application is shown. The electronic device 10 can include radio frequency (RF) circuit 501, memory 502 including one or more computer readable storage media, input unit 503, display unit 504, sensor 505, audio circuit 506, wireless fidelity (WiFi) module 507, processor 508 including one or more processing cores, and power supply 509, etc. Those skilled in the art can understand that the electronic device 10 shown in the figure is not a limitation on the electronic device 10, and the electronic device 10 can include more or fewer components than those shown in the figure, or combine some components, or different component arrangements. Figure 18 The structure of the electronic device 10 shown in the figure does not constitute a limitation on the electronic device 10, and can include more or fewer components than those shown in the figure, or combine some components, or different component arrangements.

[0078] The radio frequency circuit 501 can be used for transmitting and receiving information, or receiving and sending signals in the process of communication. In particular, after receiving the downlink information from the base station, the radio frequency circuit 501 delivers the information to the one or more processors 508 for processing. In addition, the radio frequency circuit 501 sends the uplink data to the base station. Generally, the radio frequency circuit 501 includes, but is not limited to, an antenna, at least one amplifier, a tuner, one or more oscillators, a Subscriber Identity Module (SIM) card, a transceiver, a coupler, a Low Noise Amplifier (LNA), a duplexer, and the like. In addition, the radio frequency circuit 501 can communicate with a network and other devices through wireless communication. The wireless communication can use any communication standards or protocols, including but not limited to Global System for Mobile Communication (GSM), General Packet Radio Service (GPRS), Code Division Multiple Access (CDMA), Wideband Code Division Multiple Access (WCDMA), Long Term Evolution (LTE), email, Short Messaging Service (SMS), and the like.

[0079] The memory 502 can be used to store applications and data. The memory 502 stores executable codes in the application programs. The application programs can constitute various functional modules. The processor 508 executes various functional applications and data processing by running the application programs stored in the memory 502. The memory 502 can mainly include a program storage area and a data storage area, wherein the program storage area can store an operating system, at least one application program required by a function (such as a sound playing function, an image playing function, and the like), and the like; the data storage area can store data (such as audio data, a phone book, and the like) created according to the use of the electronic device 10, and the like. In addition, the memory 502 can include a high-speed random access memory, and can also include a non-volatile memory, such as at least one magnetic disk storage device, a flash memory device, or other volatile solid-state memory device. Accordingly, the memory 502 can also include a memory controller to provide the processor 508 and the input unit 503 with access to the memory 502.

[0080] The input unit 503 can be configured to receive input of numbers, characters, and / or user-specific information (e.g., fingerprints), and to generate key, mouse, joystick, optical, or trackball signal inputs related to user settings and function control. Specifically, in one embodiment, the input unit 503 can include a touch-sensitive surface and other input devices. The touch-sensitive surface, also known as a touch display or touchpad, can collect touch operations (e.g., operations by a user using a finger, a stylus, or any suitable object or accessory on or near the touch-sensitive surface) on or near the touch-sensitive surface and drive corresponding connected devices according to pre-set programs. Optionally, the touch-sensitive surface can include two parts, a touch detection device and a touch controller. The touch detection device detects the location of a user's touch and detects signals resulting from the touch operation, and transmits the signals to the touch controller. The touch controller receives the touch information from the touch detection device, converts it into touch coordinates, and sends it to the processor 508, and can also receive commands from the processor 508 and execute them.

[0081] The display unit 504 can be configured to display information input by a user or information provided to the user, as well as various graphical user interfaces of the electronic device 10, which can be composed of graphics, text, icons, video, and any combination thereof. The display unit 504 can include a display panel. Optionally, the display panel can be configured in the form of a liquid crystal display (LCD), an organic light-emitting diode (OLED), or the like. Further, the touch-sensitive surface can cover the display panel, and when the touch-sensitive surface detects a touch operation on or near it, it transmits the information to the processor 508 to determine the type of touch event, and then the processor 508 provides corresponding visual output on the display panel according to the type of touch event. Although in the above description, the touch-sensitive surface and the display panel are implemented as two independent components to achieve input and output functions, in some embodiments, the touch-sensitive surface and the display panel can be integrated to achieve input and output functions. It can be understood that the display screen can include the input unit 503 and the display unit 504. Figure 18

[0082] ​The electronic device 10 can also include at least one sensor 505, such as a light sensor, a motion sensor, and other sensors. Specifically, the light sensor can include an ambient light sensor and a proximity sensor, wherein the ambient light sensor can adjust the brightness of the display panel according to the brightness of ambient light, and the proximity sensor can turn off the display panel and / or the backlight when the electronic device 10 is moved to the ear. As one of the motion sensors, the gravity acceleration sensor can detect the magnitude of acceleration in each direction (generally three axes), and when at rest, it can detect the magnitude and direction of gravity, which can be used for applications such as identifying the posture of the mobile phone (such as switching between horizontal and vertical screens, related games, and magnetometer posture calibration), vibration recognition related functions (such as pedometers and tapping), and the like. As for other sensors that the electronic device 10 can also be configured, such as a gyroscope, a barometer, a hygrometer, a thermometer, an infrared sensor, and the like, they will not be described here.

[0083] The audio circuit 506 can provide an audio interface between the user and the electronic device 10 through the speaker and the microphone. The audio circuit 506 can convert the received audio data into an electrical signal and transmit it to the speaker, which converts the electrical signal into a sound signal output. On the other hand, the microphone collects sound signals and converts them into electrical signals, which are received by the audio circuit 506 and converted into audio data. After being processed by the processor 508, the audio data is output to the radio frequency circuit 501 to be sent to another electronic device 10, for example, or to the memory 502 for further processing. The audio circuit 506 can also include a headset jack to provide communication between an external headset and the electronic device 10.

[0084] Wireless Fidelity (WiFi) is a short-range wireless transmission technology. The wireless Fidelity module 507 can help users send and receive emails, browse web pages, and access streaming media, and provides users with wireless broadband Internet access. Although Figure 18 The wireless Fidelity module 507 is shown, but it is understood that it does not belong to the essential components of the electronic device 10, and can be omitted as needed without changing the essence of the application.

[0085] The processor 508 is the control center of the electronic device 10, which connects all parts of the electronic device 10 through various interfaces and lines, executes various functions and processes data of the electronic device 10 by running or executing application programs stored in the memory 502 and calling data stored in the memory 502, and thus monitors the entire electronic device 10. Optionally, the processor 508 can include one or more processing cores; preferably, the processor 508 can integrate an application processor and a modem processor, wherein the application processor mainly processes the operating system, the user interface, and the application program, and the modem processor mainly processes wireless communication. It can be understood that the above-mentioned modem processor can also not be integrated into the processor 508.

[0086] The electronic device 10 also includes a power supply 509 for supplying power to the various components. Preferably, the power supply 509 is logically connected to the processor 508 through a power management system, such that the power management system enables functions such as management of charging, discharging, and power consumption management. The power supply 509 can also include one or more DC or AC power sources, recharging systems, power failure detection circuits, power converters or inverters, power status indicators, and the like.

[0087] Although Figure 18 The electronic device 10 can also include a Bluetooth module or the like, which is not shown in the figure, and will not be described here. In practice, the various modules described above can be implemented as independent entities, or can be combined in any manner as the same or several entities. The implementation of the various modules described above can be found in the method embodiments described above, and will not be described here.

[0088] The various technical features of the above embodiments can be combined in any manner. In order to make the description simple, not all possible combinations of the technical features in the above embodiments are described. However, as long as the combinations of the technical features do not contradict each other, they should be considered as falling within the scope of the present disclosure.

[0089] The above embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the patent scope of the present application. It should be noted that, for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all fall within the protection scope of the present application. Therefore, the patent protection scope of the present application should be subject to the appended claims.

Claims

1. A cemented prism assembly, characterized by, The application relates to a prism group, which comprises: a first prism, which comprises an incident surface, a first inclined surface and a first bonding surface, the first inclined surface and the first bonding surface are oppositely arranged and are both arranged at an acute angle with the incident surface; a second prism, which comprises a second bonding surface, a bottom surface and a third bonding surface, the second bonding surface and the third bonding surface are oppositely arranged and are both arranged at an acute angle with the bottom surface; a third prism, which comprises a fourth bonding surface, an emitting surface and a second inclined surface, the fourth bonding surface and the second inclined surface are oppositely arranged and are both arranged at an acute angle with the emitting surface, the third prism is connected between the first prism and the second prism, and the incident surface and the emitting surface are oppositely arranged with the bottom surface; and a first diaphragm and a second diaphragm, the first diaphragm and the second diaphragm respectively enclose a first light transmission area and a second light transmission area, the first diaphragm is arranged between the first bonding surface and the second bonding surface, the first light transmission area is filled with a first adhesive material, so that the first bonding surface and the second bonding surface are bonded, the second diaphragm is arranged between the third bonding surface and the fourth bonding surface, and the third bonding surface and the fourth bonding surface are bonded by a second adhesive material, the third bonding surface and the fourth bonding surface are spaced apart to form an air layer at the position of the second light transmission area, and the bonded prism group is configured to enable at least part of the light incident on the first prism from the incident surface to sequentially pass through the first prism, the first adhesive material, the second prism, the air layer and the third prism, and be emitted from the emitting surface.

2. The cemented prism group according to claim 1, wherein The incident surface is provided with an incident area, the first inclined surface is provided with a first reflection area, the second inclined surface is provided with a second reflection area, and the emitting surface is provided with an emitting area, at least part of the light incident on the incident area can be reflected through the first reflection area and the second reflection area in sequence and emitted from the emitting area.

3. The cemented prism group according to claim 1, wherein The first inclined surface is provided with a first light reflection area, the incident surface is provided with an incident area and a second light reflection area, the bottom surface is provided with a third light reflection area, the emitting surface is provided with a fourth light reflection area and an emitting area, the second inclined surface is provided with a fifth light reflection area, and at least part of the light incident on the incident area can be reflected through the first light reflection area, the second light reflection area, the third light reflection area, the fourth light reflection area and the fifth light reflection area in sequence and emitted from the emitting area.

4. The cemented prism group according to claim 3, wherein The second prism further comprises a top surface, the top surface is oppositely arranged with the bottom surface, the bonded prism group further comprises a first light shield, the first light shield is arranged on the top surface, and part of the structure of the first light shield covers the second light reflection area and / or the fourth light reflection area.

5. The cemented prism group according to claim 4, wherein The first light shield and the incident surface are oppositely arranged, and / or the first light shield and the emitting surface are oppositely arranged.

6. The cemented prism group according to claim 4, wherein The top surface is higher than the incident surface, so that the first light shield and the incident surface are oppositely arranged.

7. The glued prism group according to claim 4 or 6, characterized in that, The top surface is higher than the emitting surface, so that the first light shield and the emitting surface are oppositely arranged.

8. The cemented prism group according to claim 4, wherein The light-in surface, the top surface and the light-out surface are provided with a first glue area for setting a third glue material, the third glue material avoids the second light reflection area and the fourth light reflection area, the first light shield is bonded to the third glue material and is spaced apart from the light-in surface and the light-out surface under the support of the third glue material.

9. The glued prism group according to claim 3 or 4, characterized in that, The glued prism group further comprises a second light shield, the second light shield is arranged on the bottom surface, and part of the structure of the second light shield covers the third light reflection area.

10. The cemented prism group according to claim 9, wherein The bottom surface is provided with a groove, the groove bottom wall is a plane, the third light reflection area is located on the groove bottom wall, and the second light shield is attached to the bottom surface to be spaced apart from the groove bottom wall.

11. The cemented prism group according to claim 9, wherein The bottom surface is provided with a second glue area for setting a fourth glue material, and the fourth glue material avoids the third light reflection area, the second light shield is bonded to the fourth glue material, and is spaced apart from the corresponding position of the third light reflection area of the bottom surface under the support of the fourth glue material.

12. The cemented prism assembly of claim 1, wherein, The material refractive index difference value of the first prism, the second prism and the third prism is less than or equal to 0.1, and the material refractive index difference value of the first prism and the second prism relative to the first glue material is less than or equal to 0.

05.

13. The glued prism group according to claim 1, characterized in that, The third glue surface and the fourth glue surface are spaced apart from each other by a distance of 35-125 μm at positions corresponding to the air layer.

14. An image capture module, comprising: A camera module comprising a lens, an image sensor and a glued prism group according to any one of claims 1-13, the lens corresponding to the light-in surface, the image sensor corresponding to the light-out surface, and part of the light rays collected by the lens can enter the first prism from the light-in surface of the first prism and exit from the light-out surface of the third prism to the image sensor.

15. An electronic device, comprising: The camera module according to claim 14. The camera module according to claim 14.

Images