Light-transmitting film, light guide assembly, shooting module and electronic equipment

Abstract

The invention relates to a light-transmitting film, a light guide assembly, a shooting module and electronic equipment. The light-transmitting film is provided with a light-in surface and a light-out surface which are oppositely arranged, the light-transmitting film comprises at least two film layers, the at least two film layers are sequentially arranged in a stacked mode in the direction from the light-in surface to the light-out surface, and the refractive indexes of the at least two film layers are sequentially reduced. According to the light-transmitting film, the reflection effect of light rays between the two adjacent film layers is low, stray light components can be reduced, and the imaging quality of the light rays is improved.

Description

Technical Field

[0001] The present application relates to the technical field of electronic products, and in particular to a light-transmitting film, a light-guiding component, a camera module and an electronic device. Background Art

[0002] Smartphones, tablet computers, e-readers and other electronic devices may be equipped with a camera module to achieve image acquisition functions. The camera module usually includes a lens, an image sensor and a light guide component. The light guide component may include optical elements such as a prism. The light collected by the lens can be transmitted to the image sensor through the light guide component to form an image. However, the camera module in the related art is prone to generate stray light and affect the image quality. Summary of the invention

[0003] The embodiments of the present application provide a light-transmitting film, a light-guiding component, a camera module and an electronic device to solve the problem that the camera module is prone to generate stray light.

[0004] A light-transmitting film has a light-entry surface and a light-emitting surface arranged opposite to each other. The light-transmitting film includes at least two film layers, and in the direction from the light-entry surface to the light-emitting surface, at least two of the film layers are stacked in sequence, and the refractive indices of at least two of the film layers decrease in sequence.

[0005] In the above-mentioned light-transmitting film, the refractive index of at least two film layers decreases successively in the direction from the light incident surface to the light emitting surface, which can reduce the refractive index difference between two adjacent film layers, thereby reducing the reflection effect of light between two adjacent film layers, which is beneficial to reduce the stray light component formed by the reflection of light between the film layers and improve the imaging quality of light.

[0006] A light guide assembly comprises a first light guide element, optical glue and the above-mentioned light-transmitting film, wherein the light-transmitting film is arranged between the first light guide element and the optical glue.

[0007] A shooting module comprises a lens, an image sensor and a light guide assembly as described above, wherein the light exiting side of the lens is arranged corresponding to the light incident surface of the first light guide element, and the light guide assembly is used to conduct light from the lens to the image sensor.

[0008] An electronic device comprises the above-mentioned shooting module. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0010] Figure 1 Schematic diagram of the structure of electronic equipment in some embodiments.

[0011] Figure 2 Schematic diagram of the structure of the shooting module in some embodiments.

[0012] Figure 3 for Figure 2 A schematic diagram of the structure of the light guide component in the shooting module shown.

[0013] Figure 4 Graph showing the deposition angle and refractive index of film layers in a light-transmitting film in some embodiments.

[0014] Figure 5 Schematic diagram of the structure of the shooting module in some other embodiments.

[0015] Figure 6 for Figure 5 A schematic diagram of the structure of the light guide component in the shooting module shown.

[0016] Figure 7 Schematic diagram of the structure of other components of the electronic device in some embodiments.

[0017] 10. Electronic device; 11. Shooting module; 111. Camera lens; 1111. Lens; 112. Image sensor; 113. Transmitting element; 1131. First reflecting surface; 1132. Second reflecting surface; 1133. Third reflecting surface; 1134. Fourth reflecting surface; 1135. Fifth reflecting surface; 1136. Sixth reflecting surface; 1137. Seventh reflecting surface; 114. Light guide assembly; 1141. First light guide element; 1142. Light entrance area; 1143. First sub-reflection surface; 1144. Second light guide element; 1145. Light exit area; 1146. Second sub-reflection surface; 1147. Optical adhesive; 1148. Translucent film; 1149. Light entrance surface; 1151. Light exit surface; 12. Shell; 121. Light inlet. DETAILED DESCRIPTION

[0018] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present application are provided in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present application more thorough and comprehensive.

[0019] As used herein, "electronic device" refers to a device that can receive and / or send communication signals, including but not limited to a device that is connected via any one or more of the following connection methods:

[0020] (1) Connection via wired lines, such as Public Switched Telephone Networks (PSTN), Digital Subscriber Line (DSL), digital cable, and direct cable connection;

[0021] (2) Via wireless interfaces, such as cellular networks, wireless local area networks (WLAN), digital television networks such as DVB-H networks, satellite networks, and AM-FM broadcast transmitters.

[0022] An electronic device configured to communicate via a wireless interface may be referred to as a "mobile terminal". Examples of mobile terminals include, but are not limited to, the following electronic devices:

[0023] (1) Satellite phone or cellular phone;

[0024] (2) Personal Communications System (PCS) terminals that can combine cellular radio telephones with data processing, fax, and data communications capabilities;

[0025] (3) Radiotelephone, pager, Internet / intranet access, Web browser, notepad, calendar, Personal Digital Assistant (PDA) equipped with a Global Positioning System (GPS) receiver;

[0026] (4) conventional laptop and / or palmtop receivers;

[0027] (5) Conventional laptop and / or palmtop radio telephone transceivers, etc.

[0028] See also Figure 1 and Figure 2 , Figure 1 is a schematic diagram of the structure of the electronic device 10 in some embodiments, Figure 2 Schematic diagram of the structure of the shooting module 11 in some embodiments. The electronic device 10 provided in this application includes but is not limited to a smart phone, a tablet computer, an e-reader, a wearable device and the like. In the embodiments of this application, the electronic device 10 is exemplified by taking a smart phone as an example.

[0029] In some embodiments, the electronic device 10 includes a housing 12 and a shooting module 11, and the shooting module 11 is accommodated in the housing 12. The shooting module 11 may include a lens 111 and an image sensor 112. The lens 111 is used to collect light. The lens 111 may include multiple lenses 1111 with optical power. The cooperation of the multiple lenses 1111 can correct aberrations while collecting light, thereby improving the imaging quality of the shooting module 11. The image sensor 112 includes but is not limited to a charge coupled device (CCD) or a complementary metal oxide semiconductor device (CMOS Sensor). The light from the lens 111 can be projected onto the image sensor 112 for imaging, so that the electronic device 10 can realize the image acquisition function. In some embodiments, a light inlet 121 that penetrates the housing 12 is opened on the housing 12. When the shooting module 11 is accommodated in the housing 12, the light entrance side of the lens 111 corresponds to the light inlet 121, so as to collect light.

[0030] Furthermore, in some embodiments, the camera module 11 further includes a conductive element 113, the conductive element 113 has at least one reflective surface, the light from the lens 111 can be projected onto the reflective surface of the conductive element 113, and the reflective surface can project at least part of the light projected onto the reflective surface onto the image sensor 112. Figure 2 As shown, in some embodiments, the lens 111 and the image sensor 112 are disposed on the same side of the conductive element 113, and the conductive element 113 includes a first reflective surface 1131, a second reflective surface 1132, and a third reflective surface 1133. The first reflective surface 1131 is disposed opposite to the light-emitting side of the lens 111, the second reflective surface 1132 is disposed corresponding to the photosensitive surface of the image sensor 112, and the third reflective surface 1133 is disposed on the side of the conductive element 113 facing the lens 111 and the image sensor 112. The lens 111 can project at least part of the collected light onto the first reflective surface 1131, the first reflective surface 1131 can reflect at least part of the light projected onto the first reflective surface 1131 onto the third reflective surface 1133, the third reflective surface 1133 can reflect at least part of the light projected onto the third reflective surface 1133 onto the second reflective surface 1132, and the second reflective surface 1132 can reflect at least part of the light projected onto the second reflective surface 1132 onto the image sensor 112. Thus, the conductive element 113 can guide at least part of the light from the lens 111 to form an image on the image sensor 112 .

[0031] In the above-mentioned shooting module 11, the transmission element 113 is provided with a first reflection surface 1131, a second reflection surface 1132 and a third reflection surface 1133, which can guide the light from the lens 111 to the image sensor 112 located on the same side as the lens 111, so that the lens 111 and the image sensor 112 can be arranged on the same side of the transmission element 113, so that the lens 111 and the image sensor 112 at least partially overlap in the optical axis direction of the lens 111, which is conducive to reducing the size of the shooting module 11 in the thickness direction of the electronic device 10, reducing the occupied space of the lens 111 and the image sensor 112 in the electronic device 10, and also enabling the focusing function to be realized by moving the transmission element 113, thereby reducing the focusing stroke of the electronic device 10. In addition, the transmission element 113 is set to reflect the light three times, which can extend the propagation path of the light at the rear end of the lens 111, so that the transmission element 113 can adapt to the telephoto lens 111, and compress the occupied space of the shooting module 11 while obtaining sufficient optical magnification.

[0032] The specific setting of the lens 111 in the shooting module 11 is not limited. In some embodiments, the lens 111 includes four lenses 1111 spaced apart from each other in sequence along the optical axis. The first lens 1111 of the lens 111, that is, the lens 1111 closest to the light inlet 121, can be made of glass and processed by grinding, mainly for correcting aberrations and eliminating temperature drift. The other three lenses 1111 of the lens 111 can be made of plastic and processed by injection molding, which is mainly used to correct aberrations. It should be understood that this embodiment only exemplarily lists the materials and processing methods of the above-mentioned lenses 1111, but is not limited thereto. Those skilled in the art can flexibly select according to actual needs.

[0033] In some embodiments, the third reflective surface 1133 is arranged perpendicular to the optical axis of the lens 111, and the first reflective surface 1131 and the second reflective surface 1132 are both at an angle of 30 degrees to the third reflective surface 1133, which can reasonably configure the propagation path of the light on the conductive element 113, so that the incident angle of the light on the third reflective surface 1133 after being reflected by the first reflective surface 1131 meets the requirement of the critical angle of total reflection, so that at least part of the light can be totally reflected on the third reflective surface 1133 and hit the second reflective surface 1132, which is beneficial to improving the utilization efficiency of the light.

[0034] Please refer to Figure 2As shown, when the conductive element 113 has a first reflective surface 1131, a second reflective surface 1132 and a third reflective surface 1133, the conductive element 113 can be a prism, and the angle between the first reflective surface 1131 and the second reflective surface 1132 and the third reflective surface 1133 is not limited to 30°, but can be any angle less than 45°, as long as the conductive element 113 can guide at least the light from the lens 111 to the image sensor 112.

[0035] In one embodiment, the conducting element 113 is a prism. The conducting element 113 may include a single integrated or a combination of multiple sub-prisms. Optionally, the conducting element 113 is formed by connecting two sub-prisms together by gluing, and the sub-prism gluing method can provide an aperture screen printing at the interface of the two sub-prisms to reduce or mitigate stray light.

[0036] Combination Figure 2 and Figure 3 As shown, in some embodiments, the conductive element 113 includes a first light guide element 1141 and a second light guide element 1144. The first light guide element 1141 and the second light guide element 1144 can both be roughly in the shape of a prism, and the first light guide element 1141 and the second light guide element 1144 together form a large prism shape. The surface of the first light guide element 1141 opposite to the lens 111 can be regarded as a light entrance area 1142, the first reflection surface 1131 is provided on the first light guide element 1141, the surface of the second light guide element 1144 opposite to the image sensor 112 can be regarded as a light exit area 1145, the second reflection surface 1132 is provided on the second light guide element 1144, and the light entrance area 1142 and the light exit area 1145 can be regarded as jointly forming a third reflection surface 1133. The first light guide element 1141 and the second light guide element 1144 are bonded by an optical adhesive 1147, and the conductive element 113 and the optical adhesive 1147 together form the light guide assembly 114.

[0037] It is understandable that the refractive index of the prism is usually higher than the refractive index of the optical glue 1147. For example, the refractive index of the first light guide element 1141 and the second light guide element 1144 may be greater than or equal to 1.52 and less than or equal to 2, and the refractive index of the optical glue 1147 may be greater than or equal to 1.48 and less than or equal to 1.60. In the related art, the two prisms are usually directly bonded to each other through the optical glue 1147. When the light is emitted from the prism to the optical glue 1147, that is, from the optically dense medium to the optically sparse medium, the light is easily reflected at the interface between the prism and the optical glue 1147 to form stray light, which affects the imaging quality of the shooting module 11.

[0038] To solve the above problems, in some embodiments, the light guide assembly 114 further includes a light-transmitting film 1148 disposed between the first light guide element 1141 and the optical adhesive 1147. The light-transmitting film 1148 includes at least two film layers stacked in sequence. The refractive index of each film layer in the light-transmitting film 1148 is less than or equal to the refractive index of the first light guide element 1141, and greater than or equal to the refractive index of the optical adhesive 1147. The light-transmitting film 1148 includes a light-entering surface 1149 and a light-emitting surface 1151 disposed opposite to each other. The light-entering surface 1149 faces the first light guide element 1141 and is used to receive light from the first light guide element 1141. The light-emitting surface 1151 faces the second light guide element 1144, and the light-emitting surface 1151 can be adhered to the optical adhesive 1147. In the direction from the light-entering surface 1149 to the light-emitting surface 1151, at least two film layers in the light-transmitting film 1148 are stacked in sequence, and the refractive indexes of the at least two film layers decrease in sequence.

[0039] The above-mentioned light guide component 114 is provided with a light-transmitting film 1148 with a refractive index between the first light guide element 1141 and the optical glue 1147 between the first light guide element 1141 and the optical glue 1147. The refractive index of at least two film layers in the light-transmitting film 1148 gradually decreases, which can make the refractive index in the direction from the first light guide element 1141 to the optical glue 1147 change smoothly, reduce the refractive index difference between two adjacent structures, thereby reducing the reflection effect of light between the first light guide element 1141 and the light-transmitting film 1148, between two adjacent film layers in the light-transmitting film 1148, and between the light-transmitting film 1148 and the optical glue 1147, which is beneficial to suppressing the generation of stray light in the light guide component 114, thereby helping to improve the imaging quality of the shooting module 11. It can be understood that when the light is emitted from the optical glue 1147 to the second light guide element 1144, it can be regarded as emitting from a light-sparse medium to a light-dense medium. The light is not easily reflected between the optical glue 1147 and the second light guide element 1144, so a light-transmitting film 1148 may not be set between the optical glue 1147 and the second light guide element 1144.

[0040] The material and setting process of the light-transmitting film 1148 are not limited, as long as the refractive index of the light-transmitting film 1148 can be between the first light-guiding element 1141 and the optical adhesive 1147, and the refractive index of each film layer in the light-transmitting film 1148 can be reduced in sequence, so as to reduce the refractive index difference between two adjacent structures in the light-guiding component 114. In some embodiments, the material of each film layer in the light-transmitting film 1148 can include a first light-transmitting substance and a second light-transmitting substance, and in the direction from the light-entering surface 1149 to the light-emitting surface 1151, the proportion of the first light-transmitting substance in the film layer and the second light-transmitting substance in at least two film layers changes in sequence. For example, in the direction from the light-entering surface 1149 to the light-emitting surface 1151, the proportion of the first light-transmitting substance in the film layer can be reduced in sequence, or the proportion of the first light-transmitting substance in the film layer can be increased in sequence. The specific design can be made according to the specific settings of the first light-transmitting substance and the second light-transmitting substance, as long as the refractive index of the film layer can be reduced in sequence. In this embodiment, in the process of setting each film layer of the light-transmitting film 1148, by changing the first light-transmitting material and the second light-transmitting material in each film layer, the effect of sequentially changing the refractive index of each film layer can be achieved.

[0041] Furthermore, in some embodiments, the material of each film layer in the light-transmitting film 1148 may include silicon oxynitride (Si x N y O z ), for example, it may include a mixture of silicon nitride (SiN) and silicon oxide (SiO), then the first light-transmitting substance may be silicon nitride, and the second light-transmitting substance may be silicon oxide. In the mixture of silicon nitride and silicon oxide, the smaller the proportion of silicon nitride, the smaller the refractive index of the mixture of silicon nitride and silicon oxide. As a result, in the direction from the light incident surface 1149 to the light exiting surface 1151, the proportion of the first light-transmitting substance of each film layer in the light-transmitting film 1148 decreases successively, and the effect of successively decreasing the refractive index of each film layer can be achieved.

[0042] In some embodiments, each film layer of the light-transmitting film 1148 can be generated by filling a silicon wafer substrate with nitrogen and oxygen. During the generation process of each film layer, the ratio of nitrogen and oxygen is controlled, so that the proportion of silicon nitride and silicon oxide in each generated film layer can be controlled, thereby adjusting the refractive index of the film layer. For example, when generating a film layer closer to the first light-guiding element 1141, the proportion of nitrogen is controlled to increase, so that the proportion of silicon nitride in the generated film layer increases, and a film layer with a larger refractive index can be generated. When producing a film layer closer to the optical adhesive 1147, the proportion of nitrogen is controlled to decrease, so that the proportion of silicon nitride in the generated film layer decreases, and a film layer with a smaller refractive index can be generated.

[0043] It should be noted that in the present application, by controlling the ratio of nitrogen and oxygen in the film generation process, thereby controlling the ratio of the first light-transmitting substance and the second light-transmitting substance, a sufficiently large refractive index adjustment range can be achieved. For example, when the proportion of oxygen filled is 0, the film layer mainly includes silicon nitride, and the refractive index of the film layer can reach 2.1. When the proportion of nitrogen filled is 0, the film layer mainly includes silicon oxide, and the refractive index of the film layer can reach 1.45. In other words, the refractive index of each film layer in the light-transmitting film 1148 can be any value between 1.45 and 2.1. The light-transmitting film 1148 has a sufficiently large refractive index adjustment range, so that it can adapt to prisms and optical glue 1147 with large differences in refractive index, that is, it can adapt to the use of a first light-guiding element 1141 with a larger refractive index, which is beneficial to improve the reflectivity of light on the first reflection surface 1131, the second reflection surface 1132 and the third reflection surface 1133, and improve the utilization efficiency of light in the shooting module 11.

[0044] For example, in some embodiments, the refractive index of the first light guide element 1141 may be 1.95, the material of the first light guide element 1141 may be H-ZLaF89L glass, the refractive index of the optical glue 1147 may be 1.56, and the material of the optical glue 1147 may be NOA61, then the refractive index of each film layer in the light-transmitting film 1148 may be between 1.95 and 1.56. In each embodiment of the present application, the refractive index and material of the second light guide element 1144 may be the same as those of the first light guide element 1141. Of course, the number of film layers in the light-transmitting film 1148 and the refractive index difference between two adjacent film layers are not limited. When it is necessary to achieve better imaging quality, the number of film layers in the light-transmitting film 1148 can be increased, and the refractive index difference between two adjacent film layers can be reduced, thereby minimizing the refractive index difference between two adjacent structures to the greatest extent and suppressing the reflection effect of light. When it is necessary to compress the size of the light guide component 114, the number of film layers in the light-transmitting film 1148 can be reduced.

[0045] In other embodiments, the film layers of the light-transmitting film 1148 may be formed by evaporation or sputtering, and in the direction from the light incident surface 1149 to the light emitting surface 1151, the deposition angles of the film layers change sequentially, for example, the deposition angles of the film layers increase or decrease sequentially, so as to achieve the effect of sequentially changing the refractive index of the film layers. Figure 2 , Figure 3 and Figure 4 As shown, Figure 4 The relationship between the refractive index of the film layer and the deposition angle is shown in FIG. Figure 4It can be seen that the larger the deposition angle of the film layer, the larger the refractive index of the generated film layer. In some embodiments, the material of each film layer of the light-transmitting film 1148 includes aluminum oxide (AL2O3), and in the direction from the light incident surface 1149 to the light emitting surface 1151, the deposition angle of each film layer decreases successively, so that the refractive index of each film layer generated decreases successively. By adjusting the deposition angle of the film layer to change the refractive index of the film layer, the refractive index adjustment process is simpler and more convenient.

[0046] Further, in some embodiments, the refractive index of the first light guide element 1141 may be 1.66, the material of the first light guide element 1141 may be H-ZBaF50 glass, the refractive index of the optical glue 1147 may be 1.56, the material of the optical glue 1147 may be NOA61, and the material of each film layer of the light-transmitting film 1148 may be between 1.66-1.56. Figure 4 As shown, the deposition angle of each film layer can be between 90°-80°. For example, the Gel refractive index of the film layer adjacent to the first light guide element 1141 can be 90°, and the refractive index of the film layer adjacent to the optical adhesive 1147 can be 80°. Of course, in this embodiment, the number of film layers of the light-transmitting film 1148 and the difference in refractive index between two adjacent film layers are not limited, and can be specifically designed according to the imaging quality and size requirements. For example, the light-transmitting film 1148 may include three film layers, and the deposition angle between two adjacent film layers differs by 5°. The light-transmitting film 1148 may also include six film layers, and the deposition angle between two adjacent film layers differs by 2°, so as to improve the imaging quality of the shooting module 11.

[0047] It should be noted that Figure 2 The conductive element 113 shown can reflect at least part of the light three times and then emit it to the image sensor 112. The conductive element 113 is suitable for a lens 111 with a magnification of 2x-4x (equivalent focal length is approximately 40mm-90mm). When the lens 111 of the shooting module 11 has a higher magnification, the conductive element 113 can also deflect the light more times to further extend the propagation path of the light in the conductive element 113, so as to adapt to the telephoto design of the lens 111.

[0048] For example, refer to Figure 5As shown, in some embodiments, the conductive element 113 includes a fourth reflective surface 1134 and a fifth reflective surface 1135 disposed opposite to each other, and the conductive element 113 also includes a sixth reflective surface 1136 and a seventh reflective surface 1137 disposed opposite to each other. The fourth reflective surface 1134 is disposed opposite to the light emitting side of the lens 111, and the fifth reflective surface 1135 is disposed opposite to the photosensitive surface of the image sensor 112. A reflective film 114 is provided on the fourth reflective surface 1134 and the fifth reflective surface 1135. The fourth reflective surface 1134 can reflect at least part of the light incident on the fourth reflective surface 1134 by the lens 111 to the sixth reflective surface 1136. The sixth reflective surface 1136 can reflect at least part of the light incident on the sixth reflective surface 1136 to the seventh reflective surface 1137. The seventh reflective surface 1137 can reflect at least part of the light incident on the seventh reflective surface 1137 to the fifth reflective surface 1135. The fifth reflective surface 1135 can reflect at least part of the light incident on the fifth reflective surface 1135 to the image sensor 112.

[0049] In some embodiments, the conductive element 113 may be a quadrangular prism, the sixth reflective surface 1136 and the seventh reflective surface 1137 are parallel to each other and perpendicular to the optical axis of the lens 111, the fourth reflective surface 1134 and the fifth reflective surface 1135 are parallel to each other, the angle between the fourth reflective surface 1134 and the sixth reflective surface 1136 is 30°, and the angle between the fifth reflective surface 1135 and the seventh reflective surface 1137 is 30°. Of course, the angle setting of the conductive element 113 is not limited thereto, as long as it can reflect at least part of the light from the lens 111 four times and then guide it to the image sensor 112.

[0050] Figure 3 In the illustrated embodiment, the conductive element 113 can reflect at least part of the light from the lens 111 four times and then project it onto the image sensor 112, thereby extending the propagation path of the light in the conductive element 113, which is conducive to adapting to the lens 111 with a higher magnification. Figure 5 The conductive element 113 in the illustrated embodiment may be used for a lens 111 having a magnification of 3x to 10x (equivalent focal length is approximately 65mm to 200mm).

[0051] It is understandable that, combined with Figure 5 and Figure 6As shown, the first light guide element 1141 can be regarded as having a light entrance area 1142, a fourth reflection surface 1134 and a first sub-reflection surface 1143, and the second light guide element 1144 can be regarded as having a light exit area 1145, a fifth reflection surface 1135 and a second sub-reflection surface 1146, wherein the light entrance area 1142 and the second sub-reflection surface 1146 can be regarded as jointly constituting the aforementioned sixth reflection surface 1136, and the light exit area 1145 can be regarded as jointly constituting the aforementioned seventh reflection surface 1137. The first light guide element 1141 and the second light guide element 1144 can both be roughly in the shape of a quadrangular prism, for example, both are roughly in the shape of a right-angled trapezoidal prism, and the first light guide element 1141 and the second light guide element 1144 together constitute a parallelogram prism. In this embodiment, the first light guide element 1141 and the second light guide element 1144 may also be adhered to each other by the optical glue 1147, and a light-transmitting film 1148 is also arranged between the first light guide element 1141 and the optical glue 1147 to reduce the reflection effect of light on the first light guide element 1141 and the optical glue 1147, reduce the stray light of the shooting module 11, and improve the imaging quality. The specific setting of the light-transmitting film 1148 can be obtained by referring to the above records and will not be repeated here.

[0052] refer to Figure 7 , Figure 7 The electronic device 10 is a schematic diagram of the structure of the electronic device 10 provided in the embodiment of the present 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. Those skilled in the art will understand that Figure 7 The structure of the electronic device 10 shown in the figure does not constitute a limitation on the electronic device 10, and the electronic device 10 may include more or less components than those shown in the figure, or combine certain components, or arrange the components differently.

[0053] The radio frequency circuit 501 can be used to send and receive information, or receive and send signals during a call. In particular, after receiving the downlink information of the base station, it is handed over to one or more processors 508 for processing; in addition, the data related to the uplink is sent to the base station. Usually, 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, etc. In addition, the radio frequency circuit 501 can also communicate with the network and other devices through wireless communication. The wireless communication can use any communication standard or protocol, including but not limited to the global system for mobile communications (GSM), the general packet radio service (GPRS), the code division multiple access (CDMA), the wideband code division multiple access (WCDMA), the long term evolution (LTE), email, the short message service (SMS), etc.

[0054] The memory 502 can be used to store applications and data. The applications stored in the memory 502 contain executable codes. The applications can be composed of various functional modules. The processor 508 executes various functional applications and data processing by running the applications 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, an application required for at least one function (such as a sound playback function, an image playback function, etc.), etc.; the data storage area can store data created according to the use of the electronic device 10 (such as audio data, a phone book, etc.), etc. 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 disk storage device, a flash memory device, or other volatile solid-state storage devices. 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.

[0055] The input unit 503 can be used to receive input digital, character information or user feature information (such as fingerprints), and generate keyboard, mouse, joystick, optical or trackball signal input related to user settings and function control. Specifically, in a specific embodiment, the input unit 503 may include a touch-sensitive surface and other input devices. The touch-sensitive surface, also known as a touch display screen or a touch pad, can collect user touch operations on or near it (such as operations performed by users using fingers, styluses, or any other suitable objects or accessories 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. Among them, the touch detection device detects the user's touch orientation, detects the signal brought by the touch operation, and transmits the signal to the touch controller; the touch controller receives the touch information from the touch detection device, converts it into touch point coordinates, and then sends it to the processor 508, and can receive and execute commands sent by the processor 508.

[0056] The display unit 504 can be used to display information input by the user or information provided to the user and various graphical user interfaces of the electronic device 10, which can be composed of graphics, text, icons, videos and any combination thereof. The display unit 504 may 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. Furthermore, the touch-sensitive surface may cover the display panel, and when the touch-sensitive surface detects a touch operation on or near it, it is transmitted to the processor 508 to determine the type of touch event, and then the processor 508 provides a corresponding visual output on the display panel according to the type of touch event. Although in Figure 7 In the embodiment, the touch sensitive surface and the display panel are used as two independent components to implement input and output functions, but in some embodiments, the touch sensitive surface and the display panel can be integrated to implement input and output functions. It can be understood that the display screen 110 can include an input unit 503 and a display unit 504.

[0057] 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, wherein the ambient light sensor may adjust the brightness of the display panel according to the brightness of the ambient light, and the proximity sensor may turn off the display panel and / or backlight when the electronic device 10 is moved to the ear. As a type of motion sensor, the gravity acceleration sensor can detect the magnitude of acceleration in each direction (generally three axes), and can detect the magnitude and direction of gravity when stationary. It can be used for applications that identify the posture of the mobile phone (such as horizontal and vertical screen switching, related games, magnetometer posture calibration), vibration recognition related functions (such as pedometer, tapping), etc.; as for other sensors that the electronic device 10 can also be configured with, such as gyroscopes, barometers, hygrometers, thermometers, infrared sensors, etc., they will not be repeated here.

[0058] The audio circuit 506 can provide an audio interface between the user and the electronic device 10 through a speaker and a microphone. The audio circuit 506 can convert the received audio data into an electrical signal, transmit it to the speaker, and convert it into a sound signal for output; on the other hand, the microphone converts the collected sound signal into an electrical signal, which is received by the audio circuit 506 and converted into audio data, and then the audio data is output to the processor 508 for processing, and then sent to another electronic device 10 through the radio frequency circuit 501, or the audio data is output to the memory 502 for further processing. The audio circuit 506 may also include an earphone socket to provide communication between an external earphone and the electronic device 10.

[0059] Wireless Fidelity (WiFi) is a short-range wireless transmission technology. The electronic device 10 can help users send and receive emails, browse web pages, and access streaming media through the wireless fidelity module 507, which provides users with wireless broadband Internet access. Figure 7 The wireless fidelity module 507 is shown, but it is understandable that it is not a necessary component of the electronic device 10 and can be omitted as needed without changing the essence of the invention.

[0060] The processor 508 is the control center of the electronic device 10. It uses various interfaces and lines to connect various parts of the entire electronic device 10. By running or executing applications stored in the memory 502 and calling data stored in the memory 502, it executes various functions of the electronic device 10 and processes data, thereby monitoring the electronic device 10 as a whole. 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 processes the operating system, user interface, and application programs, and the modem processor mainly processes wireless communications. It is understandable that the above-mentioned modem processor may not be integrated into the processor 508.

[0061] The electronic device 10 also includes a power supply 509 for supplying power to various components. Preferably, the power supply 509 can be logically connected to the processor 508 through a power management system, so that the power management system can manage charging, discharging, and power consumption. The power supply 509 can also include one or more DC or AC power supplies, recharging systems, power failure detection circuits, power converters or inverters, power status indicators, and other arbitrary components.

[0062] although Figure 7 Not shown, 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 can be arbitrarily combined and implemented as the same or several entities. The specific implementation of the above modules can refer to the previous method embodiment, which will not be described in detail here.

[0063] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described 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.

[0064] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A light-transmitting film, It is characterized in that The light-transmitting film has a light-entry surface and a light-exiting surface that are arranged opposite to each other. The light-transmitting film includes at least two film layers, and in the direction from the light-entry surface to the light-exiting surface, at least two of the film layers are stacked in sequence, and the refractive index of at least two of the film layers decreases in sequence.

2. The light-transmitting film according to claim 1, It is characterized in that The material of the film layer includes a first light-transmitting substance and a second light-transmitting substance, and in a direction from the light incident surface to the light emitting surface, the proportions of the first light-transmitting substance and the second light-transmitting substance in at least two of the film layers change sequentially.

3. The light-transmitting film according to claim 2, It is characterized in that The first light-transmitting material includes silicon nitride, the second light-transmitting material includes silicon oxide, and in a direction from the light-incident surface to the light-emitting surface, the proportion of the first light-transmitting material in at least two of the film layers decreases successively.

4. The light-transmitting film according to claim 1, It is characterized in that In a direction from the light incident surface to the light emitting surface, the deposition angles of at least two of the film layers change sequentially.

5. The light-transmitting film according to claim 4, It is characterized in that The material of the film layers includes aluminum oxide, and in a direction from the light incident surface to the light emitting surface, the deposition angles of at least two of the film layers decrease sequentially.

6. The light-transmitting film according to claim 5, It is characterized in that The deposition angle of the film layer is less than or equal to 90° and greater than or equal to 80°.

7. A light guide assembly, It is characterized in that It comprises a first light guide element, optical adhesive and a light-transmitting film as described in any one of claims 1 to 6, wherein the light-transmitting film is arranged between the first light guide element and the optical adhesive.

8. The light guide assembly according to claim 7, It is characterized in that The refractive index of the first light guide element is greater than the refractive index of the optical adhesive, and the refractive index of each film layer in the light-transmitting film is less than or equal to the refractive index of the first light guide element and greater than or equal to the refractive index of the optical adhesive.

9. The light guide assembly according to claim 8, It is characterized in that The refractive index of the first light guide element is 1.52-2, the refractive index of the optical adhesive is 1.48-1.60, and the refractive index of each film layer in the light-transmitting film is 1.56-1.95 or 1.56-1.

66.

10. The light guide assembly according to claim 7, It is characterized in that The light guide assembly further includes a second light guide element, the first light guide element has a light entrance area, the second light guide element has a light exit area, and the light guide assembly is used to transmit light incident from the light entrance area to the light exit area for emission.

11. The light guide assembly according to claim 10, It is characterized in that The light incident area and the light exit area are coplanar and face the same side.

12. The light guide assembly according to claim 11, It is characterized in that The first conductive element also has a first reflective surface, and the second conductive element also has a second reflective surface. The first reflective surface is opposite to the light incident area, and the second reflective surface is opposite to the light exiting area. The first reflective surface is used to reflect light from the light incident area to the light incident area and the light exiting area, and the light incident area and the light exiting area are used to reflect light to the second reflective surface, and the second reflective surface is used to reflect light to the light exiting surface.

13. The light guide assembly according to claim 10, It is characterized in that The first light guiding element also has a fourth reflecting surface and a first sub-reflecting surface, and the second light guiding element also has a fifth reflecting surface and a second sub-reflecting surface. The fourth reflecting surface is used to reflect light from the light incident area to the light incident area and the second sub-reflecting surface, the light incident area and the second sub-reflecting surface are used to reflect light to the first sub-reflecting surface and the light exiting area, the first sub-reflecting surface and the light exiting area are used to reflect light to the fifth reflecting surface, and the fifth reflecting surface is used to reflect light to the light exiting area.

14. A shooting module, It is characterized in that It comprises a lens, an image sensor and a light guide assembly as described in any one of claims 7 to 13, wherein the light output side of the lens is arranged corresponding to the light input area of ​​the first light guide element, and the light guide assembly is used to transmit the light from the lens to the image sensor.

15. An electronic device, It is characterized in that Comprising the shooting module as described in claim 14.

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