Optical conducting element, photographing module and electronic device

Abstract

The application relates to an optical transmission element, a shooting module and electronic equipment. The optical transmission element comprises a main body and a first light-absorbing film. The main body has a light-transmitting surface, a first reflecting surface, a second reflecting surface and a bottom surface. The light-transmitting surface is provided with a light-in area and a light-out area. The first reflecting surface is inclined to the light-transmitting surface and is arranged corresponding to the light-in area. The second reflecting surface is inclined to the light-transmitting surface and is arranged corresponding to the light-out area. The bottom surface is connected to the first reflecting surface and the second reflecting surface and is opposite to the light-transmitting surface. The bottom surface is provided with a first groove. The first light-absorbing film covers at least two side walls opposite to the first groove. The optical transmission element has a small volume, which is beneficial to compressing the occupied space of the shooting module in the electronic equipment.

Description

Technical Field

[0001] This application relates to the field of camera device technology, and in particular to an optical transmission element, a shooting module, and an electronic device. Background Technology

[0002] Smartphones, tablets, e-readers, and other electronic devices are increasingly incorporating camera modules for photography. To adapt the telephoto design of these modules to the structural layout of electronic devices and reduce their thickness, periscope-style camera modules have emerged. These modules utilize optical transmission elements such as prisms to deflect light, thereby reducing their size along the thickness of the device. However, the placement of these optical transmission elements in current periscope camera modules also tends to increase their overall size. Summary of the Invention

[0003] This application provides an optical transmission element, a shooting module, and an electronic device to solve the problem that the placement of the optical transmission element easily increases the size of the shooting module.

[0004] An optical transmission element, comprising:

[0005] The main body has a light-transmitting surface, a first reflective surface, a second reflective surface, and a bottom surface. The light-transmitting surface has an incident light area and an exit light area. The first reflective surface is inclined to the light-transmitting surface and corresponding to the incident light area. The second reflective surface is inclined to the light-transmitting surface and corresponding to the exit light area. The bottom surface is connected to the first reflective surface and the second reflective surface and is opposite to the light-transmitting surface. The bottom surface has a first groove.

[0006] The first light-absorbing film covers at least the two opposite sidewalls of the first groove.

[0007] A shooting module includes a lens, an image sensor, and an optical transmission element as described above, wherein the light-emitting side of the lens is disposed corresponding to the light-incident area, and the image sensor is disposed corresponding to the light-emitting area.

[0008] An electronic device includes a housing and a shooting module as described above, the shooting module being disposed in the housing, the housing having a light inlet hole, the light inlet hole being disposed corresponding to the light-inlet side of the lens.

[0009] In the aforementioned optical transmission element, at least a portion of the light entering the main body from the light-incident area is reflected by the first reflective surface to the light-transmitting surface, then reflected by the light-transmitting surface to the second reflective surface, and further reflected by the second reflective surface to the light-exiting area, from which the optical transmission element exits. The bottom surface connects the first and second reflective surfaces, making the cross-section of the main body of the optical transmission element approximately trapezoidal. Compared to a direct connection between the first and second reflective surfaces resulting in a roughly triangular cross-section, this effectively reduces the size of the main body in the direction from the light-transmitting surface to the bottom surface. This allows the optical transmission element to deflect the light path while also compressing the size of the imaging module. Furthermore, the light-incident and light-exiting areas are located on the light-transmitting surface, making the light-transmitting surface approximately perpendicular to the thickness direction of the electronic device. When it is necessary to increase the area of ​​the light-incident and light-exiting areas to increase the aperture of the imaging module, the size of the optical transmission element in the thickness direction of the electronic device will not increase. This allows the imaging module to have a larger aperture and a smaller footprint. In addition, a first groove is provided on the bottom surface, and a first light-absorbing film is provided on the two sidewalls opposite to the first groove, so that the first groove can block and absorb light outside the light-transmitting aperture, reduce stray light and interference light components in the optical transmission element, and improve imaging quality. Attached Figure Description

[0010] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0011] Figure 1 This is a schematic diagram of the structure of an electronic device in some embodiments.

[0012] Figure 2 This is a schematic diagram of the imaging module in some embodiments.

[0013] Figure 3 This is a cross-sectional schematic diagram of an optical transmission element in some embodiments.

[0014] Figure 4 This is a schematic diagram of the structure of the optical transmission element in some embodiments.

[0015] Figure 5 This is a schematic diagram of the main body in some embodiments.

[0016] Figure 6 This is a structural schematic diagram of the main body from another angle in some embodiments.

[0017] Figure 7 This is a cross-sectional schematic diagram of the optical transmission element in some other embodiments.

[0018] Figure 8 This is a schematic diagram of the structure in some embodiments where the third light-absorbing film is disposed on the first reflective surface.

[0019] Figure 9 This is a schematic diagram of the structure of the fifth light-absorbing film disposed on the light-transmitting surface in some embodiments.

[0020] Figure 10 This is a schematic diagram of the structure of other components of the electronic device in some embodiments.

[0021] Figure label:

[0022] 10. Electronic device; 11. Shooting module; 111. Lens; 1111. Lens; 112. Image sensor; 113. Optical transmission element; 1131. Main body; 1132. First reflecting surface; 1133. First reflecting area; 1134. Second reflecting surface; 1135. Second reflecting area; 1136. Light-transmitting surface; 1137. Light-incident area; 1138. Light-exiting area; 1139. Light-absorbing area; 114. 1. Bottom surface; 1142. First groove; 1143. End face; 1144. Second groove; 1145. Third groove; 1146. Chamfer; 1147. First light-absorbing film; 1148. Second light-absorbing film; 1149. Third light-absorbing film; 1151. Fourth light-absorbing film; 1152. Fifth light-absorbing film; 1153. Light-absorbing element; 1154. Reflective film; 116. Infrared filter; 12. Housing; 121. Light inlet hole. Detailed Implementation

[0023] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings. Preferred embodiments of this application are shown in the drawings. However, this application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of this application.

[0024] As used herein, "electronic device" refers to, but is not limited to, a device capable of receiving and / or transmitting communication signals connected via any one or more of the following connection methods:

[0025] (1) Via wired connection, such as via Public Switched Telephone Networks (PSTN), Digital Subscriber Line (DSL), digital cable, or direct cable connection;

[0026] (2) Via wireless interface, such as cellular network, wireless local area network (WLAN), digital television network such as DVB-H network, satellite network, AM-FM broadcast transmitter.

[0027] An electronic device configured to communicate via a wireless interface can be referred to as a "mobile terminal". Examples of mobile terminals include, but are not limited to, the following electronic devices:

[0028] (1) Satellite phone or cellular phone;

[0029] (2) A Personal Communications System (PCS) terminal that can combine cellular radio telephone with data processing, fax and data communication capabilities;

[0030] (3) Radio telephone, pager, Internet / intranet access, web browser, notepad, calendar, personal digital assistant (PDA) equipped with a Global Positioning System (GPS) receiver;

[0031] (4) Conventional above-knee and / or palm-sized receivers;

[0032] (5) Conventional knee-mounted and / or handheld wireless telephone transceivers, etc.

[0033] Please see Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of the structure of the electronic device 10 in some embodiments. Figure 2 This is a schematic diagram of the structure of the camera module 11 in some embodiments. The electronic device 10 provided in this application includes, but is not limited to, devices such as smartphones, tablets, e-readers, and wearable devices that can be equipped with the camera module 11 to have a camera function. The electronic device 10 in the embodiments of this application is illustrated by taking a smartphone as an example.

[0034] In some embodiments, the electronic device 10 includes a housing 12 and a camera module 11. The camera module 11 is housed within the housing 12. The electronic device 10 is equipped with the camera module 11 to perform a camera function. The camera module 11 can be designed as a periscope structure to compress the size of the camera module 11 in the thickness direction of the electronic device 10, thereby optimizing the structural layout of the electronic device 10 and reducing its thickness. The assembly relationship between the housing 12 and the camera module 11 is not limited and can be designed according to the structural layout of the electronic device 10. For example, in some embodiments, the housing 12 includes a middle frame, a front cover, and a rear cover. The middle frame can be generally rectangular, and the front and rear covers can be respectively disposed on both sides of the middle frame to form an accommodating space together with the middle frame. The camera module 11 can be housed within the accommodating space of the housing 12. In this application, the direction from the front cover to the rear cover of the housing 12 can be considered as the thickness direction of the electronic device 10.

[0035] In some embodiments, the imaging module 11 includes a lens 111, an image sensor 112, and an optical transmission element 113. The lens 111 is used to collect light and may include multiple lenses 1111 with optical power. The cooperation of multiple lenses 1111 can correct aberrations while collecting light, thereby improving the imaging quality of the imaging module 11. The image sensor 112 includes, but is not limited to, a charge-coupled device (CCD) or a complementary metal-oxide-semiconductor sensor (CMOS sensor). The optical transmission element 113 is used to transmit the light from the lens 111 to the image sensor 112 for imaging, so that the electronic device 10 can perform the shooting function. In some embodiments, a light-entry hole 121 is provided on the housing 12, penetrating the housing. When the imaging module 11 is housed in the housing 12, the light-incident side of the lens 111 corresponds to the light-entry hole 121 to collect the light entering the light-entry hole 121. The axis of the lens 111 can be approximately parallel to the thickness direction of the electronic device 10. The optical transmission element 113 is configured to deflect light while transmitting it, achieving a periscope-like structure design. This helps to reduce the size of the shooting module 11 in the thickness direction of the electronic device 10. Furthermore, positioning the lens 111 on the light-inlet side of the optical transmission element 113 allows the light-inlet aperture 121 to correspond to the light-inlet side of the lens 111. This allows the light-inlet aperture 121 to be circular, adapting to the other aperture structures of the electronic device 10. Compared to the traditional square light-inlet aperture that needs to accommodate the shape of a prism, this improves the aesthetics of the electronic device 10.

[0036] Lens 111 may include multiple lenses 1111 with optical power, and the number and type of lenses 1111 are not limited. In some embodiments, lens 111 includes four lenses 1111 spaced apart from each other along the optical axis. The first lens 1111 of lens 111, that is, the lens 1111 farthest from the optical transmission element 113, may be made of glass and formed by grinding, mainly used to correct aberrations and eliminate temperature drift. The other three lenses 1111 of lens 111 may be made of plastic and formed by injection molding, mainly used to correct aberrations. It should be understood that this embodiment only exemplifies the materials and processing methods of the lenses 1111, but is not limited thereto, and those skilled in the art can flexibly choose according to actual needs.

[0037] refer to Figure 2 As shown, in some embodiments, the axis of lens 111 is substantially parallel to the axis of image sensor 112. Optical transmission element 113 is configured to deflect the light path by 180°. The light-incident region 1137 of optical transmission element 113, which receives light from lens 111, and the light-exit region 1138, which emits light onto image sensor 112, may face the same side. In some embodiments, the light-incident region 1137 is correspondingly disposed to the light-exit side of lens 111 and is used to receive light from lens 111. The light-exit region 1138 is correspondingly disposed to the photosensitive surface of image sensor 112 and is used to emit light from optical transmission element 113 onto image sensor 112. In some embodiments, the light-incident region 1137 and the light-exit region 1138 are coplanar, and the plane containing the light-incident region 1137 and the light-exit region 1138 is substantially perpendicular to the axis of lens 111 and the axis of image sensor 112.

[0038] It should be noted that the optical transmission element 113 can deflect the light path by 180°, allowing the lens 111 and the image sensor 112 to be located on the same side of the optical transmission element 113. This results in the lens 111 and the image sensor 112 at least partially overlapping in the optical axis direction of the lens 111, which helps to reduce the size of the shooting module 11 in the thickness direction of the electronic device 10 and compress the space occupied by the shooting module 11 in the thickness direction of the electronic device 10. In this application, the axis of the image sensor 112 can be perpendicular to the photosensitive surface of the image sensor 112.

[0039] In some embodiments, the optical transmission element 113 is configured to direct light from the lens 111 to the image sensor 112 after at least three reflections. This helps to extend the propagation path of light at the rear end of the lens 111, allowing the optical transmission element 113 to adapt to the telephoto design of the lens 111. This enables the periscope design to be achieved while obtaining sufficient optical magnification, thereby reducing the space occupied by the shooting module 11.

[0040] In some embodiments, the main body 1131 of the optical transmission element 113 has a first reflective surface 1132, a second reflective surface 1134, and a light-transmitting surface 1136. The light-incident area 1137 and the light-exiting area 1138 are both disposed on the light-transmitting surface 1136. In other words, different areas of the light-transmitting surface 1136 are respectively opposite to the lens 111 and the image sensor 112. The first reflective surface 1132 is inclined to the light-transmitting surface 1136 and is disposed corresponding to the light-incident area 1137, while the second reflective surface 1134 is inclined to the light-transmitting surface 1136 and is disposed corresponding to the light-exiting area 1138. At least a portion of the light from lens 111 enters optical transmission element 113 through light-incident area 1137 and strikes first reflective surface 1132. First reflective surface 1132 reflects at least a portion of the light striking it onto light-transmitting surface 1136. Light-transmitting surface 1136 reflects at least a portion of the light reflected from first reflective surface 1132 onto light-transmitting surface 1136 onto second reflective surface 1134. Second reflective surface 1134 reflects at least a portion of the light reflected from light-transmitting surface 1136 onto light-exit area 1138, thereby causing at least a portion of the light to exit optical transmission element 113 from light-exit area 1138 and strike image sensor 112. Referring to the above description, light-transmitting surface 1136 may be substantially perpendicular to the axis of lens 111 and the axis of image sensor 112.

[0041] In some embodiments, the angles between the first reflective surface 1132 and the second reflective surface 1134 and the light-transmitting surface 1136 are both greater than or equal to 25° and less than or equal to 35°, for example, 32.5°. This configuration can improve the efficiency and accuracy of light reflection by the first reflective surface 1132, the second reflective surface 1134, and the light-transmitting surface 1136, thereby enabling the optical transmission element 113 to successfully deflect the light path by 180°.

[0042] In this embodiment, the optical transmission element 113 can reflect at least a portion of the light three times before projecting it onto the image sensor 112. This allows the optical transmission element 113 to be suitable for the telephoto design of the lens 111. Through a periscope design, the size of the shooting module 11 in the thickness direction of the electronic device 10 is compressed while matching the telephoto lens 111, for example, making it suitable for lenses 111 with a magnification of 2x to 4x (equivalent focal length approximately 40mm to 90mm). When the lens 111 of the shooting module 11 has a higher magnification, the optical transmission element 113 can also deflect the light more times to further extend the propagation path of the light in the optical transmission element 113, adapting to the telephoto design of the lens 111.

[0043] It should be noted that the first reflecting surface 1132 and the second reflecting surface 1134 can be connected to each other, meaning that the optical transmission element 113 can be approximately prism-shaped. (Reference) Figure 2As shown, in some embodiments, the optical transmission element 113 may also have a bottom surface 1141 connecting the first reflecting surface 1132 and the second reflecting surface 1134. The bottom surface 1141 is opposite to the light-transmitting surface 1136. For example, the bottom surface 1141 is approximately parallel to the light-transmitting surface 1136, and the cross-section of the optical transmission element 113 can be approximately an isosceles trapezoid. Of course, the bottom surface 1141 should be positioned to avoid the effective field of view of the first reflecting surface 1132 and the second reflecting surface 1134, or partially correspond to the stray light portion at the edge of the effective field of view, so as not to affect the normal imaging of the imaging module 11. The bottom surface 1141 of the optical transmission element 113 can be formed by cutting a prism, or it can be formed directly during the injection molding process. Without affecting the imaging quality of the shooting module 11, the bottom surface 1141 can reduce the size of the optical transmission element 113 in the optical axis direction of the lens 111 compared to using a prism as the optical transmission element 113, thereby further compressing the size of the shooting module 11 in the thickness direction of the electronic device 10.

[0044] In some embodiments, the main body 1131 of the optical transmission element 113 can be a prism, with a first reflecting surface 1132, a second reflecting surface 1134, a light-transmitting surface 1136, and a bottom surface 1141 all disposed on the main body 1131. The material of the main body 1131 includes, but is not limited to, glass or plastic, and the refractive index of the main body 1131 can be between 1.5 and 1.9, which can effectively deflect the light path and realize the periscope design of the shooting module 11. For example, the material of the main body 1131 can be glass, and the refractive index of the main body 1131 can be 1.61.

[0045] Furthermore, combined Figure 2 , Figure 3 and Figure 4 As shown, in some embodiments, the main body 1131 further has two opposite end faces 1143, both of which are connected to the first reflective surface 1132 and the second reflective surface 1134. The bottom surface 1141 is connected to the two end faces 1143. A first groove 1142 is formed on the bottom surface 1141. The direction from the bottom surface 1141 to the light-transmitting surface 1136 can be considered the depth direction of the first groove 1142. The first groove 1142 extends along the line connecting the two end faces 1143. The optical transmission element 113 also includes a first light-absorbing film 1147, which at least covers the two opposite sidewalls of the first groove 1142. When the two opposite sidewalls of the first groove 1142 are connected to each other with an arcuate surface, the first light-absorbing film 1147 can also cover the arcuate surface connected to the two sidewalls. The material of the first light-absorbing film 1147 includes, but is not limited to, any suitable light-absorbing material with light-absorbing properties, such as ink.

[0046] The aforementioned optical transmission element 113, with its light-incident area 1137 and light-exit area 1138 disposed on the light-transmitting surface 1136, allows the light-transmitting surface 1136 to be approximately perpendicular to the thickness direction of the electronic device 10. When it is necessary to increase the area of ​​the light-incident area 1137 and the light-exit area 1138 to increase the aperture of the imaging module 11, the size of the optical transmission element 113 is mainly increased in the direction perpendicular to the thickness of the electronic device 10, without causing an increase in the size of the optical transmission element 113 in the thickness direction of the electronic device 10. This allows the imaging module 11 to have a larger aperture and a smaller footprint. In addition, a first groove 1142 is provided on the bottom surface 1141, and a first light-absorbing film 1147 is provided on the two opposite sidewalls of the first groove 1142. This allows the first groove 1142 to block and absorb light outside the light-transmitting aperture, reducing stray light and interference light components in the optical transmission element 113 and improving image quality.

[0047] In some embodiments, the opposite side walls of the first groove 1142 and the arc-shaped bottom wall can be configured as diffuse reflective surfaces, such as frosted or atomized surfaces, and the first light-absorbing film 1147 covers the diffuse reflective surface of the first groove 1142. The diffuse reflective surface of the first groove 1142 can scatter light incident on the side walls and bottom wall of the first groove 1142, reducing the brightness of the light and making it easier for the light to be absorbed by the first light-absorbing film 1147. It also helps to reduce the brightness of stray light or interfering light that is not absorbed by the first light-absorbing film 1147, thereby reducing the impact of stray light on image quality.

[0048] Combination Figure 5 , Figure 6 and Figure 7As shown, in some embodiments, a second groove 1144 and a third groove 1145 are respectively provided on the two end faces 1143 of the main body 1131. The second groove 1144 and the third groove 1145 both extend along the bottom surface 1141 towards the light-transmitting surface 1136, and the direction of the line connecting the two end faces 1143 can be regarded as the depth direction of the second groove 1144 and the third groove 1145. The first light-absorbing film 1147 also covers at least the opposite sides of the second groove 1144 and the third groove 1145. Due to the arrangement of the first light-absorbing film 1147, the first groove 1142, the second groove 1144, and the third groove 1145 can all absorb light. These three grooves together define the aperture range of the optical transmission element 113. Light incident on the sidewalls of the first groove 1142, the second groove 1144, and the third groove 1145 is absorbed by the first light-absorbing film 1147. Light incident on the aperture range defined by the first groove 1142, the second groove 1144, and the third groove 1145 can pass through the area jointly defined by these three grooves. The second groove 1144 and the third groove 1145, working in conjunction with the first groove 1142, can better absorb interference or stray light outside the aperture range, reducing interference and stray light components in the optical transmission element 113 and improving the imaging quality of the imaging module 11.

[0049] In some embodiments, the two ends of the first groove 1142 are respectively connected to the second groove 1144 and the third groove 1145, and the first groove 1142, the second groove 1144, and the third groove 1145 are connected to form a shape that opens to one side of the light-transmitting surface 1136. Of course, the opposite sidewalls of the second groove 1144 and the third groove 1145 and the arc-shaped bottom surface 1141 can also be set as diffuse reflection surfaces such as frosted or matte surfaces, which is beneficial to further reduce stray light and interference light components, reduce the brightness of stray light and interference light, and improve the imaging quality of the imaging module 11. It is understood that the depth of the first groove 1142, the second groove 1144, and the third groove 1145 can be designed according to the size of the optical transmission element 113 and the requirements of the light-transmitting aperture and aperture size of the imaging module 11. In some embodiments, the depth of the first groove 1142 is 1 / 4 to 1 / 2 of the height of the optical transmission element 113, and the depths of the second groove 1144 and the third groove 1145 are 1 / 4 to 1 / 3 of the length of the optical transmission element 113. The dimension of the body 1131 in the direction from the light-transmitting surface 1136 to the bottom surface 1141 can be considered as the height of the optical transmission element 113, i.e., the dimension of the body 1131 in the thickness direction of the electronic device 10. The dimension of the body 1131 in the direction of the line connecting the two end faces 1143 can be considered as the length of the optical transmission element 113. This arrangement ensures that the first light-absorbing film 1147 has sufficient coverage area to effectively absorb stray and interfering light, while also ensuring that the optical transmission element 113 has sufficient aperture to meet imaging requirements.

[0050] The widths of the first groove 1142, the second groove 1144, and the third groove 1145 can be designed according to the width of the machining tool and the ink coating process for setting the first light-absorbing film 1147, as long as the first light-absorbing film 1147 can be successfully covered in the first groove 1142, the second groove 1144, and the third groove 1145. In some embodiments, the widths of the first groove 1142, the second groove 1144, and the third groove 1145 are 0.2mm-0.8mm, for example, 0.2mm, 0.5mm, or 0.8mm.

[0051] In some embodiments, the optical transmission element 113 further includes a second light-absorbing film 1148, which is disposed on the bottom surface 1141 of the main body 1131. The second light-absorbing film 1148 can cover the entire bottom surface 1141. The material of the second light-absorbing film 1148 can be any suitable material with good light absorption capabilities, such as ink. The second light-absorbing film 1148 can effectively absorb the light incident on the bottom surface 1141, preventing the light from reflecting off the bottom surface 1141 and forming stray light, thereby helping to reduce stray light and interference light components and improve the imaging quality of the imaging module 11. In some embodiments, the bottom surface 1141 is set as a diffuse reflective surface, including but not limited to a frosted surface or a matte surface. Setting the bottom surface 1141 as a diffuse reflective surface can scatter the light incident on the bottom surface 1141, thereby reducing the brightness of the light. This not only makes it easier for the light to be absorbed by the second light-absorbing film 1148, but also reduces the brightness of the light reflected by the bottom surface 1141, thereby reducing the brightness of stray light in the optical transmission element 113 and preventing stray light from affecting the imaging quality of the shooting module 11.

[0052] The two opposite edges of the light-transmitting surface 1136 can be respectively connected to the first reflective surface 1132 and the second reflective surface 1134, while the reference... Figure 2 and Figure 6 As shown, in some embodiments of this application, chamfers 1146 are provided at the transition points between the light-transmitting surface 1136 and the first reflective surface 1132, as well as at the transition points between the light-transmitting surface 1136 and the second reflective surface 1134. The surface formed by the chamfer 1146 can be inclined to or perpendicular to the light-transmitting surface 1136. Providing chamfers 1146, relative to the case where the first reflective surface 1132 and the second reflective surface 1134 are directly connected to the light-transmitting surface 1136, avoids the two ends of the main body 1131 from being too sharp and fragile, thereby reducing the risk of chipping at the sharp corners of the optical transmission element 113 due to scratches during production or assembly.

[0053] In some embodiments, the optical transmission element 113 further includes a light-absorbing element 1153 disposed between the light-transmitting surface 1136 and the first reflective surface 1132, and at a chamfer 1146 disposed between the light-transmitting surface 1136 and the second reflective surface 1134. The light-absorbing element 1153 can cover the surface of the chamfer 1146, and the material of the light-absorbing element 1153 includes, but is not limited to, materials with good light-absorbing properties such as ink. The light-absorbing element 1153 disposed at the chamfer 1146 can absorb the light incident on the chamfer 1146, preventing light reflection at the chamfer 1146 and the formation of stray light. This also helps to reduce interference light and stray light components in the imaging module 11, thereby improving the imaging quality of the imaging module 11.

[0054] refer to Figure 2 and Figure 8As shown, in some embodiments, the optical transmission element 113 further includes a third light-absorbing film 1149 and a fourth light-absorbing film 1151. The third light-absorbing film 1149 is disposed on the first reflective surface 1132, defining the light-transmitting aperture of the first reflective surface 1132. The fourth light-absorbing film 1151 is disposed on the second reflective surface 1134, defining the light-transmitting aperture of the second reflective surface 1134. The materials of the third light-absorbing film 1149 and the fourth light-absorbing film 1151 include, but are not limited to, ink and other materials with good light-absorbing properties. The third light-absorbing film 1149 and the fourth light-absorbing film 1151 can absorb light incident on the first reflective surface 1132 and the second reflective surface 1134 that is outside the range of the light-transmitting aperture, preventing light from reflecting off the first reflective surface 1132 and the second reflective surface 1134 to form stray light. This also helps to reduce the stray light component in the imaging module 11 and improve the imaging quality of the imaging module 11.

[0055] It can be understood that the areas on the first reflective surface 1132 and the second reflective surface 1134 used to reflect light so that the light can participate in the imaging of the imaging module 11 can be regarded as the light-transmitting aperture areas of the first reflective surface 1132 and the second reflective surface 1134. Light that hits the light-transmitting aperture range of the first reflective surface 1132 and the second reflective surface 1134 can be reflected and finally hit the image sensor 112 to participate in the imaging of the imaging module 11. Thus, it can be understood that the third light-absorbing film 1149 encloses and defines the first reflective area 1133 on the first reflective surface 1132, and the fourth light-absorbing film 1151 encloses and defines the second reflective area 1135 on the second reflective surface 1134. The first reflective area 1133 corresponds to the light-transmitting aperture range of the first reflective surface 1132, and the second reflective area 1135 corresponds to the light-transmitting aperture range of the second reflective surface 1134. Both the first reflective area 1133 and the second reflective area 1135 can reflect light.

[0056] It should be noted that by rationally designing the angles and orientations of the first reflecting surface 1132, the second reflecting surface 1134, and the light-transmitting surface 1136, as well as the refractive index of the main body 1131, the incident angle of the light reflected from the first reflecting surface 1132 onto the light-transmitting surface 1136 meets the requirement of total internal reflection. This improves the reflectivity of the light-transmitting surface 1136, thereby enhancing light utilization efficiency and image quality. However, the incident angles of light on the first reflecting surface 1132 and the second reflecting surface 1134 are relatively small, making it difficult to reach the critical angle for total internal reflection. Therefore, to improve the reflectivity of light on the first reflecting surface 1132 and the second reflecting surface 1134, thereby improving the light utilization rate and image quality of the imaging module 11, in some embodiments, a reflective film 1154 may also be provided on the first reflecting area 1133 of the first reflecting surface 1132 and the second reflecting area 1135 of the second reflecting surface 1134. The reflective film 1154 can improve the reflectivity of light on the first reflecting area 1133 and the second reflecting area 1135. The reflective film 1154 includes, but is not limited to, a metal film layer with good reflective properties, such as a silver plating layer.

[0057] Combination Figure 2 and Figure 3 As shown, it can be understood that the first reflective area 1133 and the second reflective area 1135 can be roughly square. When a chamfer 1146 is provided at the transition between the light-transmitting surface 1136 and the first reflective surface 1132 and the second reflective surface 1134, the third light-absorbing film 1149 and the fourth light-absorbing film 1151 can cover the area together with the light-absorbing element 1153 on the chamfer 1146 to form a roughly annular area. When the main body 1131 is not provided with a chamfer 1146, the third light-absorbing film 1149 and the fourth light-absorbing film 1151 can be roughly annular.

[0058] Combination Figure 2 and Figure 9As shown, in some embodiments, the light-transmitting surface 1136 has a generally annular light-absorbing region 1139. The light-incident region 1137 and the light-emitting region 1138 are both located within the area enclosed by the light-absorbing region 1139. The light-incident region 1137 and the light-emitting region 1138 can be two adjacent or spaced-apart regions within the light-absorbing region 1139. In some embodiments, the optical transmission element 113 may further include a fifth light-absorbing film 1152 disposed in the light-absorbing region 1139, covering at least a portion of the light-absorbing region 1139. The material of the fifth light-absorbing film 1152 includes, but is not limited to, materials with good light-absorbing properties such as ink. The fifth light-absorbing film 1152 can absorb light emitted from outside the main body 1131 onto the light-absorbing area 1139, preventing light reflection or entering the main body 1131 to form stray light. The fifth light-absorbing film 1152 can also absorb light emitted from inside the main body 1131 onto the light-absorbing area 1139, preventing light reflection to form stray light, thereby helping to reduce stray light components in the shooting module 11 and improve the imaging quality of the shooting module 11.

[0059] Furthermore, in some embodiments, the portion of the light-transmitting surface 1136 corresponding to the light-absorbing region 1139 is configured as a diffuse reflective surface, such as a frosted or matte surface. This configuration scatters the light incident on the light-absorbing region 1139, reducing its brightness. This facilitates easier absorption of the light by the fifth light-absorbing film 1152 and also reduces the brightness of the light reflected from the light-absorbing region 1139, thereby minimizing the impact of stray light on image quality.

[0060] In some embodiments, the optical transmission element 113 further includes an antireflective coating (not shown) covering the light-incident region 1137 and the light-exit region 1138. The antireflective coating may cover the area enclosed by the light-absorbing region 1139. The antireflective coating can improve the transmittance of light from the lens 111 on the light-transmitting surface 1136, as well as the transmittance of light from the optical transmission element 113 to the image sensor 112 on the light-transmitting surface 1136, thereby improving light utilization and increasing image brightness.

[0061] It should be noted that, to facilitate the differentiation of various components, the components with light-absorbing functions are schematically illustrated using cross-sectional lines in the accompanying drawings of this application, for example in... Figures 2-9 The light-absorbing films and light-absorbing components 1153 are shown in cross-section. The light-absorbing films and light-absorbing components 1153 can be formed on the main body 1131 by screen printing or spin coating, or by coating.

[0062] In some embodiments, the imaging module 11 may further include an infrared filter 116, which may be disposed between the optical transmission element 113 and the image sensor 112. The infrared filter 116 can be used to filter out interference light and prevent interference light from hitting the image sensor 112 and affecting the normal imaging of the imaging module 11.

[0063] refer to Figure 10 , Figure 10 This is a schematic diagram of the structure of an electronic device 10 provided in an embodiment of this application. The electronic device 10 may include a radio frequency (RF) circuit 501, a memory 502 including one or more computer-readable storage media, an input unit 503, a display unit 504, a sensor 505, an audio circuit 506, a wireless Fidelity (WiFi) module 507, a processor 508 including one or more processing cores, and a power supply 509, among other components. Those skilled in the art will understand that... Figure 10 The structure of the electronic device 10 shown does not constitute a limitation on the electronic device 10. It may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0064] The radio frequency (RF) circuit 501 can be used to send and receive information, or to receive and send signals during a call. Specifically, it receives downlink information from the base station and hands it over to one or more processors 508 for processing; additionally, it sends uplink data to the base station. Typically, the RF 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, etc. Furthermore, the RF circuit 501 can also communicate wirelessly with networks and other devices. This wireless communication can use any communication standard or protocol, including but not limited to GSM, GPRS, CDMA, WCDMA, LTE, email, and SMS.

[0065] Memory 502 can be used to store applications and data. The applications stored in memory 502 contain executable code. Applications can be composed of various functional modules. Processor 508 executes various functional applications and data processing by running the applications stored in memory 502. Memory 502 may primarily include a program storage area and a data storage area. The program storage area may store the operating system, applications required for at least one function (such as sound playback, image playback, etc.), etc.; the data storage area may store data created based on the use of electronic device 10 (such as audio data, phonebook, etc.). Furthermore, memory 502 may include high-speed random access memory and may also include non-volatile memory, such as at least one disk storage device, flash memory device, or other volatile solid-state storage device. Accordingly, memory 502 may also include a memory controller to provide access to memory 502 for processor 508 and input unit 503.

[0066] Input unit 503 can be used to receive input numbers, character information, or user characteristic information (such as fingerprints), and to generate keyboard, mouse, joystick, optical, or trackball signal inputs related to user settings and function control. Specifically, in one embodiment, input unit 503 may include a touch-sensitive surface and other input devices. The touch-sensitive surface, also known as a touch display or touchpad, can collect user touch operations on or near it (such as user operations using fingers, styluses, or any suitable object or accessory on or near the touch-sensitive surface) and drive corresponding connection devices according to a pre-set program. Optionally, the touch-sensitive surface may include a touch detection device and a touch controller. The touch detection device detects the user's touch orientation and the signal generated by the touch operation, transmitting the signal to the touch controller; the touch controller receives touch information from the touch detection device, converts it into touch point coordinates, sends it to the processor 508, and can receive and execute commands from the processor 508.

[0067] Display unit 504 can be used to display information input by the user or information provided to the user, as well as various graphical user interfaces of electronic device 10. These graphical user interfaces can be composed of graphics, text, icons, video, and any combination thereof. Display unit 504 may include a display panel. Optionally, the display panel can be configured in the form of a liquid crystal display (LCD), organic light-emitting diode (OLED), etc. Further, a touch-sensitive surface can cover the display panel. When the touch-sensitive surface detects a touch operation on or near it, it transmits the information to processor 508 to determine the type of touch event. Subsequently, processor 508 provides corresponding visual output on the display panel according to the type of touch event. Although in Figure 10 In this embodiment, the touch-sensitive surface and the display panel are two separate components for implementing input and output functions. However, in some embodiments, the touch-sensitive surface and the display panel can be integrated to achieve both input and output functions. It is understood that the display screen 110 may include an input unit 503 and a display unit 504.

[0068] The electronic device 10 may also include at least one sensor 505, such as a light sensor, a motion sensor, and other sensors. Specifically, the light sensor may include an ambient light sensor and a proximity sensor. The ambient light sensor can adjust the brightness of the display panel according to the ambient light level, and the proximity sensor can turn off the display panel and / or backlight when the electronic device 10 is moved to the ear. As a type of motion sensor, a gravity acceleration sensor can detect the magnitude of acceleration in various directions (generally three axes). When stationary, it can detect the magnitude and direction of gravity and can be used for applications that recognize the phone's posture (such as landscape / portrait switching, related games, magnetometer posture calibration), vibration recognition related functions (such as pedometer, tapping), etc. Other sensors that may be configured in the electronic device 10, such as gyroscopes, barometers, hygrometers, thermometers, and infrared sensors, will not be described in detail here.

[0069] Audio circuit 506 provides an audio interface between the user and electronic device 10 via a speaker and microphone. Audio circuit 506 converts received audio data into electrical signals, transmits them to the speaker, and the speaker outputs them as sound signals. Conversely, the microphone converts collected sound signals into electrical signals, which are then received by audio circuit 506, converted back into audio data, and processed by processor 508. The audio data is then transmitted via radio frequency circuit 501 to, for example, another electronic device 10, or output to memory 502 for further processing. Audio circuit 506 may also include a headphone jack to facilitate communication between peripheral headphones and electronic device 10.

[0070] WiFi (Wireless Fidelity) is a short-range wireless transmission technology. Electronic device 10, through WiFi module 507, can help users send and receive emails, browse web pages, and access streaming media, providing users with wireless broadband internet access. Although Figure 10 The wireless fidelity module 507 is shown, but it is understood that it is not a necessary component of the electronic device 10 and can be omitted as needed without changing the nature of the invention.

[0071] The processor 508 is the control center of the electronic device 10. It connects various parts of the electronic device 10 via various interfaces and lines. By running or executing applications stored in the memory 502 and calling data stored in the memory 502, it performs various functions and processes data of the electronic device 10, thereby providing overall monitoring of the electronic device 10. Optionally, the processor 508 may include one or more processing cores; preferably, the processor 508 may integrate an application processor and a modem processor, wherein the application processor mainly handles the operating system, user interface, and applications, while the modem processor mainly handles wireless communication. It is understood that the modem processor may not be integrated into the processor 508.

[0072] The electronic device 10 also includes a power supply 509 that supplies power to the various components. Preferably, the power supply 509 can be logically connected to the processor 508 through a power management system, thereby enabling functions such as charging, discharging, and power consumption management through the power management system. The power supply 509 may also include one or more DC or AC power supplies, recharging systems, power fault detection circuits, power converters or inverters, power status indicators, and other arbitrary components.

[0073] although Figure 10 As not shown in the diagram, the electronic device 10 may also include a Bluetooth module, etc., which will not be described in detail here. In specific implementation, the above modules can be implemented as independent entities, or they can be arbitrarily combined and implemented as the same or several entities. For the specific implementation of the above modules, please refer to the previous method embodiments, which will not be described in detail here.

[0074] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0075] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. An optical transmission element, characterized in that, include: The main body comprises a light-transmitting surface, a first reflective surface, a second reflective surface, and a bottom surface. The light-transmitting surface has an incident light area and an exit light area. The first reflective surface is inclined to the light-transmitting surface and corresponding to the incident light area. The second reflective surface is inclined to the light-transmitting surface and corresponding to the exit light area. At least a portion of the light incident from the incident light area can be reflected by the first reflective surface onto the light-transmitting surface, then reflected by the light-transmitting surface onto the second reflective surface, and finally reflected by the second reflective surface and exited from the exit light area. The bottom surface connects to the first reflective surface and the second reflective surface and is opposite to the light-transmitting surface. The bottom surface has a first groove. The angle between the first reflective surface and the bottom surface, and the angle between the second reflective surface and the bottom surface, are both 25°-35°. The first light-absorbing film covers at least the two opposite sidewalls of the first groove.

2. The optical transmission element according to claim 1, characterized in that, The sidewalls of the first groove are configured as diffuse reflective surfaces.

3. The optical transmission element according to claim 1, characterized in that, The main body also has two end faces arranged opposite to each other, both end faces being connected to the first reflective surface and the second reflective surface, and the bottom surface being connected to the two end faces. A second groove and a third groove are respectively provided on the two end faces, and the second groove and the third groove both extend along the bottom surface in the direction pointing to the light-transmitting surface.

4. The optical transmission element according to claim 3, characterized in that, The two ends of the first groove are respectively connected to the second groove and the third groove, and the first groove, the second groove and the third groove together define the light-transmitting aperture of the main body.

5. The optical transmission element according to claim 3, characterized in that, The first light-absorbing film also covers at least the sidewalls of the second and third grooves, the sidewalls of the second and third grooves being configured as diffuse reflective surfaces.

6. The optical transmission element according to claim 3, characterized in that, The widths of the first groove, the second groove, and the third groove are 0.2mm-0.8mm.

7. The optical transmission element according to claim 3, characterized in that, The first groove extends along the line connecting the two end faces, and the depth of the first groove accounts for 1 / 4 to 1 / 2 of the height of the optical transmission element, while the depths of the second and third grooves account for 1 / 4 to 1 / 3 of the length of the optical transmission element.

8. The optical transmission element according to claim 1, characterized in that, The optical transmission element further includes a second light-absorbing film that covers at least a portion of the bottom surface, the bottom surface being configured as a diffuse reflective surface.

9. The optical transmission element according to claim 1, characterized in that, The light-transmitting surface and the transition between the first reflective surface and the second reflective surface are all provided with chamfers, and the optical transmission element also includes a light-absorbing element covering the chamfer.

10. The optical transmission element according to claim 1, characterized in that, The optical transmission element further includes a third light-absorbing film and a fourth light-absorbing film. The third light-absorbing film is disposed on the first reflective surface to define the light-transmitting aperture of the first reflective surface, and the fourth light-absorbing film is disposed on the second reflective surface to define the light-transmitting aperture of the second reflective surface.

11. The optical transmission element according to claim 10, characterized in that, The third light-absorbing film encloses and defines the first reflective region on the first reflective surface, and the fourth light-absorbing film encloses and defines the second reflective region on the second reflective surface. The optical transmission element also includes a reflective film disposed in the first reflective region and the second reflective region.

12. The optical transmission element according to claim 10, characterized in that, The light-transmitting surface and the transition between the first reflective surface and the second reflective surface are all provided with chamfers. The optical transmission element also includes a light-absorbing element covering the chamfer. The third light-absorbing film and the fourth light-absorbing film together with the light-absorbing element on the chamfer form a ring-shaped area.

13. The optical transmission element according to claim 1, characterized in that, At least a portion of the light rays reflected from the first reflective surface onto the light-transmitting surface undergo total internal reflection on the light-transmitting surface and then strike the second reflective surface.

14. The optical transmission element according to claim 1, characterized in that, The light-transmitting surface has a generally annular light-absorbing area. The light-incident area and the light-exiting area are both located within the range defined by the light-absorbing area. The optical transmission element also includes a fifth light-absorbing film covering the light-absorbing area. The light-absorbing area of ​​the light-transmitting surface is configured as a diffuse reflection surface. The optical transmission element also includes an anti-reflection film covering at least the light-incident area and the light-exiting area.

15. The optical transmission element according to claim 1, characterized in that, The refractive index of the optical transmission element is 1.5-1.

9.

16. A shooting module, characterized in that, It includes a lens, an image sensor, and an optical transmission element as described in any one of claims 1-15, wherein the light-emitting side of the lens is disposed corresponding to the light-incident area, and the image sensor is disposed corresponding to the light-emitting area.

17. The shooting module according to claim 16, characterized in that, The axis of the lens is parallel to the axis of the image sensor and perpendicular to the light-transmitting surface.

18. The shooting module according to claim 16, characterized in that, The lens and the image sensor at least partially overlap in the axial direction of the lens.

19. An electronic device, characterized in that, The device includes a housing and a shooting module as described in any one of claims 16-18, the shooting module being disposed on the housing, the housing having a light inlet hole, the light inlet hole being disposed on the light-inlet side of the lens, and the light inlet hole being a circular hole.

20. The electronic device according to claim 19, characterized in that, The axis of the lens is parallel to the thickness direction of the housing.

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