Reflecting film, reflecting assembly, shooting module and electronic equipment

Abstract

The invention relates to a reflecting film, a reflecting assembly, a shooting module and electronic equipment. The reflecting film comprises a first reflection increasing film, a first protective film, an aluminum film and a second protective film which are sequentially stacked, and the first reflection increasing film comprises a silicon dioxide layer and a titanium dioxide layer which is arranged on the silicon dioxide layer and faces the first protective film. The first protective film and the second protective film each comprise an aluminum oxide layer attached to the aluminum film. The reflecting film is high in reflectivity, beneficial to improving the utilization efficiency of light rays in a light path, and stable in performance and good in structural strength at the same time.

Description

Technical Field

[0001] The present application relates to the technical field of electronic equipment, and in particular to a reflective film, a reflective component, a shooting module and an electronic device. Background Art

[0002] Smartphones, tablet computers, e-readers and other electronic devices can be equipped with a shooting module to achieve the image acquisition function. The shooting module usually includes a lens and an image sensor. The light collected by the lens can be projected to the image sensor for imaging. Some shooting modules need to be equipped with a prism to reflect light to change the propagation path of the light so that the light collected by the lens can be smoothly projected onto the image sensor. However, in the related art, the light utilization efficiency of the shooting module is low, which affects the shooting effect. Summary of the invention

[0003] The embodiments of the present application provide a reflective film, a reflective component, a shooting module and an electronic device to solve the problem of low light utilization efficiency of the shooting module.

[0004] A reflective film, comprising a first anti-reflection film, a first protective film, an aluminum film and a second protective film stacked in sequence, wherein the first anti-reflection film comprises a silicon dioxide layer and a titanium dioxide layer arranged on the silicon dioxide layer facing the first protective film, and the first protective film and the second protective film both comprise an aluminum oxide layer attached thereto.

[0005] In the above-mentioned reflective film, an aluminum film is provided to play the main reflective role, and a first anti-reflective film is provided at the same time. The cooperation of the titanium dioxide layer and the aluminum oxide layer in the first anti-reflective film can effectively improve the reflective efficiency of the reflective film. In combination with the reflective effect of the aluminum film, the reflective film has good reflective efficiency. When the reflective film plays a reflective role in the light path, it can reflect more light, which is beneficial to improving the utilization efficiency of the light in the light path and reducing the loss of light on the reflective film. At the same time, the aluminum oxide in the first protective film and the second protective film can be closely combined with the aluminum film to prevent the aluminum film from being oxidized and affecting the reflective efficiency, thereby improving the performance stability of the reflective film. In the first anti-reflective film, a silicon dioxide layer is provided on the side of the titanium dioxide layer facing away from the first protective film, which can effectively improve the reflectivity of the reflective film while also playing a good protective role for the titanium dioxide layer, which is also beneficial to improving the performance stability and structural strength of the reflective film.

[0006] A reflective component comprises a prism and the reflective film as described above, wherein the prism has a reflective surface, the prism is used to receive light and reflect at least part of the light incident on the reflective surface, the reflective film is arranged on the reflective surface, and the first anti-reflection film is arranged on the side of the aluminum film facing the prism.

[0007] A shooting module comprises an image sensor and the above-mentioned reflective assembly, wherein at least part of the light reflected from the reflective surface of the prism is incident on the image sensor.

[0008] An electronic device comprises the shooting module as described above. 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 Schematic cross-sectional view of the reflective film in some embodiments.

[0013] Figure 4 for Figure 3 The reflectivity curve of the reflective film shown.

[0014] Figure 5 Schematic cross-sectional views of reflective films in other embodiments.

[0015] Figure 6 for Figure 5 The reflectivity curve of the reflective film shown.

[0016] Figure 7 Schematic cross-sectional views of reflective films in some other embodiments.

[0017] Figure 8 Schematic diagram of the structure of the shooting module in some other embodiments.

[0018] Fig. 9 Schematic diagram of the structure of other components of the electronic device in some embodiments.

[0019] Reference numerals:

[0020] 10. Electronic device; 11. Shooting module; 111. Camera lens; 1111. Lens; 112. Image sensor; 113. Prism; 1131. First reflection surface; 1132. Second reflection surface; 1133. Third reflection surface; 1134. Fourth reflection surface; 1135. Fifth reflection surface; 1136. Sixth reflection surface; 1137. Seventh reflection surface; 114. Reflection film; 1141. First anti-reflection film; 1142. First protective film; 1143. Aluminum film; 1144. Second protective film; 1145. Second anti-reflection film; 12. Shell; 121. Light inlet. DETAILED DESCRIPTION

[0021] 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.

[0022] 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:

[0023] (1) Connection via wired lines, such as Public Switched Telephone Networks (PSTN), Digital Subscriber Line (DSL), digital cable, and direct cable connection;

[0024] (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.

[0025] 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:

[0026] (1) Satellite phone or cellular phone;

[0027] (2) Personal Communications System (PCS) terminals that can combine cellular radio telephones with data processing, fax, and data communications capabilities;

[0028] (3) Radiotelephone, pager, Internet / intranet access, Web browser, notepad, calendar, Personal Digital Assistant (PDA) equipped with a Global Positioning System (GPS) receiver;

[0029] (4) conventional laptop and / or palmtop receivers;

[0030] (5) Conventional laptop and / or palmtop radio telephone transceivers, etc.

[0031] 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.

[0032] 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 incident surface of the lens 111 corresponds to the light inlet 121, so as to collect light.

[0033] Furthermore, in some embodiments, the camera module 11 further includes a prism 113, the prism 113 has at least one reflective surface, the light from the lens 111 can be projected onto the reflective surface of the prism 113, and the reflective surface can project at least part of the light projected onto the reflective surface onto the image sensor 112. Figure 2As shown, in some embodiments, the lens 111 and the image sensor 112 are disposed on the same side of the prism 113, and the prism 113 includes a first reflection surface 1131, a second reflection surface 1132, and a third reflection surface 1133. The first reflection surface 1131 is disposed opposite to the light-emitting side of the lens 111, the second reflection surface 1132 is disposed corresponding to the photosensitive surface of the image sensor 112, and the third reflection surface 1133 is disposed on the side of the prism 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 reflection surface 1131, the first reflection surface 1131 can reflect at least part of the light projected onto the first reflection surface 1131 onto the third reflection surface 1133, the third reflection surface 1133 can reflect at least part of the light projected onto the third reflection surface 1133 onto the second reflection surface 1132, and the second reflection surface 1132 can reflect at least part of the light projected onto the second reflection surface 1132 onto the image sensor 112. Thus, the prism 113 can guide at least part of the light from the lens 111 to form an image on the image sensor 112 .

[0034] In the above-mentioned shooting module 11, the prism 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 prism 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 space occupied by 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 prism 113, thereby reducing the focusing stroke of the electronic device 10. In addition, the setting of the prism 113 to reflect the light three times can extend the propagation path of the light at the rear end of the lens 111, so that the prism 113 can adapt to the telephoto lens 111, and compress the space occupied by the shooting module 11 while obtaining sufficient optical magnification.

[0035] 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.

[0036] In some embodiments, the third reflection surface 1133 is arranged perpendicular to the optical axis of the lens 111, and the first reflection surface 1131 and the second reflection surface 1132 are both at an angle of 30 degrees to the third reflection surface 1133. The propagation path of the light on the prism 113 can be reasonably configured so that the incident angle of the light on the third reflection surface 1133 after being reflected by the first reflection 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 reflection surface 1133 and hit the second reflection surface 1132, which is beneficial to improving the utilization efficiency of the light.

[0037] It is understandable that in Figure 2 In the illustrated embodiment, due to the reasonable design of the angles and orientations of the first reflective surface 1131, the second reflective surface 1132, and the third reflective surface 1133, the incident angle of the light on the third reflective surface 1133 meets the requirement of total reflection, which can improve the reflectivity of the third reflective surface 1133 to the light and improve the utilization efficiency of the light. However, the incident angles of the light on the first reflective surface 1131 and the second reflective surface 1132 are small, and it is difficult to reach the critical angle of total reflection. Therefore, in order to improve the reflectivity of the light on the first reflective surface 1131 and the second reflective surface 1132, so as to improve the light utilization efficiency of the shooting module 11, in some embodiments, the shooting module 11 further includes two reflective films 114, which are respectively arranged on the first reflective surface 1131 and the second reflective surface 1132, and the prism 113 and the reflective film 114 together constitute the reflective component of the shooting module 11. The provision of the reflective film 114 can improve the reflectivity of the light on the first reflective surface 1131 and the second reflective surface 1132.

[0038] Furthermore, combined with Figure 2 and Figure 3 As shown, in some embodiments, the reflective film 114 includes a first anti-reflection film 1141, a first protective film 1142, an aluminum (Al) film 1143, and a second protective film 1144, which are stacked in sequence. The first anti-reflection film 1141 includes a silicon dioxide (SIO2) layer and a titanium dioxide (TIO2) layer disposed on the silicon dioxide layer toward the first protective film 1142. When the reflective film 114 is disposed on the first reflective surface 1131 or the second reflective surface 1132, the first anti-reflection film 1141 of the reflective surface is disposed toward the prism 113, and the silicon dioxide layer in the first anti-reflection film 1141 is close to the prism 113. The first protective film 1142 and the second protective film 1144 both include an aluminum oxide (Al2O3) layer attached to the aluminum film 1143.

[0039] The above-mentioned reflective film 114 is provided with an aluminum film 1143 which plays a major reflective role, and can greatly improve the reflectivity of the first reflective surface 1131 and the second reflective surface 1132 to light. At the same time, a first anti-reflective film 1141 is provided facing the prism 113. The cooperation of the titanium dioxide layer and the aluminum oxide layer in the first anti-reflective film 1141 can effectively improve the reflective efficiency of the reflective film 114 to light. With the reflective effect of the aluminum film 1143, the reflective film 114 has good reflective efficiency. When the reflective film 114 is provided on the first reflective surface 1131 and the second reflective surface 1132, the first reflective surface 1131 and the second reflective surface 1132 can reflect more light, which is beneficial to improving the light utilization efficiency and aperture of the shooting module 11, reducing the loss of light on the reflective film 114, and thus improving the shooting quality. At the same time, the aluminum oxide in the first protective film 1142 and the second protective film 1144 can be tightly combined with the aluminum film 1143 to prevent the aluminum film 1143 from being oxidized and affecting the reflection efficiency, thereby improving the performance stability of the reflective film 114. In the first anti-reflection film 1141 , a silicon dioxide layer is arranged on the side of the titanium dioxide layer facing away from the first protective film 1142 , which can effectively improve the reflectivity of the reflective film 114 while also providing good protection for the titanium dioxide layer, and is also beneficial to improving the performance stability and structural strength of the reflective film 114 .

[0040] In some embodiments, the layer structure of the reflective film 114 and the thickness of each layer structure are given in Table 1 below. The reflective film 114 shown in Table 1 corresponds to Figure 3 The reflective film 114 in the embodiment shown. It can be seen from Table 1 that when the reflective film 114 is disposed on the prism 113, the first anti-reflective film 1141 is disposed close to the prism 113, and the medium on the side of the reflective film 114 facing away from the prism 113 can be air. The total thickness of the reflective film 114 in the embodiment corresponding to Table 1 is 362.89nm, and the increase in optical surface flatness (PV) is less than 0.05λ, which has the effects of small thickness, high flatness, and good quality of reflected light while improving the reflectivity.

[0041] Table 1

[0042]

[0043] Combination Figure 2 , Figure 3As shown in Table 1, in some embodiments, the first protective film 1142 also includes a silicon dioxide layer disposed on the aluminum oxide layer facing away from the aluminum film 1143, and the second protective film 1144 may also include a silicon dioxide layer attached to the aluminum oxide layer facing away from the aluminum film 1143. The silicon dioxide layer has sufficient structural strength and anti-oxidation performance, can provide good protection for the aluminum film 1143, and improve the structural strength of the reflective film 114. At the same time, the structural bonding force between the silicon dioxide layer and the aluminum oxide layer, and between the aluminum oxide layers is stronger than the bonding force between the silicon dioxide layer and the aluminum film 1143. The combination of the silicon dioxide layer and the aluminum oxide layer can make the bonding between the silicon dioxide layer, the aluminum oxide layer and the aluminum film 1143 tighter, which is conducive to improving the structural strength, performance stability and service life of the reflective film 114. In addition, the silicon dioxide layer of the first protective film 1142 is adjacent to the titanium dioxide layer in the first anti-reflection film 1141, and the cooperation between the silicon dioxide layer and the titanium dioxide layer can also further improve the reflectivity of the reflective film 114, thereby improving the utilization efficiency of light. In some embodiments, the three-layer structure of the aluminum oxide layer, the aluminum film 1143, and the aluminum oxide layer can be formed by oxidizing both sides of the aluminum material, the unoxidized portion in the center of the aluminum material forms the aluminum film 1143, and the oxidized portions on both sides of the aluminum material form the aluminum oxide layer. By providing the aluminum oxide layer on the aluminum film 1143 through this process, the structural strength of the aluminum oxide layer and the aluminum film 1143 can be further improved.

[0044] In some embodiments, the thickness of the silicon dioxide layer in the first protective film 1142 is less than the thickness of the silicon dioxide layer in the first anti-reflection film 1141. The silicon dioxide layer in the first protective film 1142 takes into account both the effect of protecting the aluminum oxide layer and improving the reflectivity, while the first anti-reflection film 1141 cooperates with the titanium dioxide layer to achieve a stronger effect of improving the reflectivity. The thickness of the silicon dioxide layer in the first anti-reflection film 1141 is greater than the thickness of the silicon dioxide layer in the first protective film 1142, which can not only improve the effect of enhancing reflection of the first anti-reflection film 1141, but also ensure that the thickness of the silicon dioxide layer in the first protective film 1142 is not too large while taking into account the effects of protection and improving the reflectivity, which is conducive to compressing the thickness of the reflective film 114. In some embodiments, the thickness of the silicon dioxide layer in the second protective film 1144 is less than the thickness of the silicon dioxide layer in the first protective film 1142, so that the second protective film 1144 provides sufficient protection for the aluminum film 1143 while not being too large in size, which is conducive to further compressing the thickness of the reflective film 114.

[0045] In some embodiments, the refractive index of the prism 113 is greater than or equal to 1.5 and less than or equal to 2. The reasonable configuration of the refractive index of the prism 113 can form a good match with the reflective film 114, and the reflectivity of the light from the prism 113 to the reflective film 114 is improved by reasonably configuring the difference in the refractive index of the prism 113 and the reflective film 114. Figure 3 In the corresponding embodiment, the refractive index of the prism 113 may be 1.52, and the material of the prism 113 may be H-K9L glass.

[0046] Combination Figure 3 and Figure 4 As shown, Figure 4 1 is a reflectivity curve diagram of the reflective film 114 in the embodiment corresponding to Table 1, wherein the horizontal axis represents the wavelength, the vertical axis represents the reflectivity, and the three different curves represent the three cases where the incident angles of the light on the reflective film 114 are 10°, 30° and 50° respectively. Figure 4 It can be seen that the maximum reflectivity of the reflective film 114 in the wavelength range of 400nm-700nm and the incident angle of 10° is 95.9% (at 550nm), and the average reflectivity is 94.35%. The maximum reflectivity at the incident angle of 50° is 92.6% (at 435nm), and the average reflectivity is 89.8%, which can effectively improve the light utilization efficiency of the shooting module 11. In addition, the reflectivity change of the reflective film 114 at an incident angle of 10°-50° is less than 5%, the reflective performance is stable, and the quality of the reflected light is high. In some embodiments, at a reference wavelength of 550nm, the refractive index of the silicon dioxide layer is 1.46, the refractive index of the titanium dioxide layer is 2.45, and the refractive index of the aluminum oxide layer is 1.67.

[0047] In some embodiments, the thickness of the aluminum film 1143 is greater than or equal to 80 nm and less than or equal to 120 nm, which can ensure that the aluminum film 1143 has sufficient thickness to reflect light and improve the reflectivity of the reflective film 114, and is also conducive to reducing the thickness of the aluminum film 1143, thereby reducing the thickness of the reflective film 114. In some examples, the thickness of the silicon dioxide layer is greater than or equal to 12 nm and less than or equal to 200 nm, and the thickness of the titanium dioxide layer is greater than or equal to 6 nm and less than or equal to 150 nm, so that the thickness of the silicon dioxide layer and the titanium dioxide layer will not be too small, which is conducive to adapting to the preparation process of the silicon dioxide layer and the titanium dioxide layer. In addition, while the silicon dioxide layer and the titanium dioxide layer are made thick enough to improve the reflectivity, the thickness of the silicon dioxide layer and the titanium dioxide layer will not be too large, which is conducive to reducing the thickness of the reflective film 114.

[0048] Combined with the following Table 2 and Figure 5 As shown in Table 2 and Figure 5 Corresponding to the reflective film 114 in other embodiments. In the embodiment corresponding to Table 2, the refractive index of the prism 113 may be 1.62, and the material of the prism 113 may be H-BAF6 glass, so that the prism 113 can form a good match with the reflective film 114, and the reflectivity of the light from the prism 113 to the reflective film 114 is improved by reasonably configuring the refractive index difference between the prism 113 and the reflective film 114.

[0049] Table 2

[0050]

[0051] In Table 2 and Figure 5 In the corresponding embodiment, the first protective film 1142 does not have a silicon dioxide layer, and the thickness of the aluminum oxide layer in the first protective film 1142 can be greater than the thickness of the aluminum oxide layer in the second protective film 1144, which can not only improve the bonding strength between the first anti-reflection film 1141 and the aluminum film 1143, improve the structural strength of the reflective film 114, but also cooperate with the first anti-reflection film 1141 to improve the reflectivity. Figure 5 and Figure 6 As shown in Table 2 and Figure 5 In the corresponding embodiment, the thickness of the reflective film 114 is 376.07nm, and the PV increase value is less than 0.05λ. While improving the reflectivity, it has the effects of small thickness, high flatness, and good quality of reflected light. The maximum reflectivity of the reflective film 114 in the wavelength range of 400nm-70nm and the incident angle of 10° is 95.5% (at 501nm), and the average reflectivity is 93.8%. The maximum reflectivity at the incident angle of 50° is 92.7% (at 435nm), and the average reflectivity is 90%. Therefore, the reflective film 114 can effectively improve the reflectivity, thereby improving the light utilization efficiency of the shooting module 11. In addition, the reflectivity change of the reflective film 114 at an incident angle of 10°-50° is less than 5%, the reflection performance is stable, and the quality of the reflected light is high.

[0052] Combination Figure 2 , Figure 7 As shown in Table 3 below, in some other embodiments, the reflective film 114 further includes a second anti-reflective film 1145 disposed on the side of the second protective film 1144 facing away from the aluminum film 1143, and the second anti-reflective film 1145 includes a silicon dioxide layer and a titanium dioxide layer disposed on the side of the silicon dioxide layer facing the second protective film 1144. The second anti-reflective film 1145 is disposed on the side of the second protective film 1144 facing away from the aluminum film 1143, and the titanium dioxide layer and the silicon dioxide layer in the second anti-reflective film 1145 cooperate to improve the reflectivity of the reflective film 114 to the light incident on the reflective film 114 from the side of the reflective film 114 facing away from the prism 113. It is understandable that when the reflective film 114 is disposed on the prism 113 to form a reflective assembly, it is usually necessary to detect the light reflected by the reflective film 114 to obtain parameters such as the reflectivity of the reflective film 114. However, when detecting the reflected light that passes through the prism 113 and hits the reflective film 114, is reflected by the reflective film 114, and then exits the prism 113, the detection result of the reflective film 114 is easily inaccurate due to the influence of factors such as impurities in the prism 113. Therefore, in Figure 7In the illustrated embodiment, a second anti-reflection film 1145 is provided on the side of the reflective film 114 facing away from the prism 113, so as to enhance the reflective film 114's ability to detect light incident on the reflective film 114 from the side of the reflective film 114 facing away from the prism 113 (for example, from the air). Thus, the light reflected by the side of the reflective film 114 facing away from the prism 113 can be detected to obtain parameters of the reflective film 114, thereby avoiding the influence of factors such as impurities in the prism 113 on the detection result, thereby improving the accuracy of the detection.

[0053] Table 3

[0054]

[0055] In the embodiment corresponding to Table 3, the refractive index of the prism 113 may also be 1.52, and the material of the prism 113 may be H-K9L glass, so that the prism 113 can form a good match with the reflective film 114, and the reflectivity of the light from the prism 113 to the reflective film 114 is improved by reasonably configuring the refractive index difference between the prism 113 and the reflective film 114.

[0056] In some embodiments, a plurality of first anti-reflection films 1141 are provided, and the plurality of first anti-reflection films 1141 are sequentially stacked and arranged on the side of the first protective film 1142 facing away from the aluminum film 1143, and each first anti-reflection film 1141 may include a silicon dioxide layer and a titanium dioxide layer. It can be understood that the more the number of first anti-reflection films 1141, the higher the reflectivity of the reflective film 114. The specific number of first anti-reflection films 1141 is not limited. For example, when it is necessary to improve the reflectivity of the reflective film 114, the number of first anti-reflection films 1141 can be increased. When it is necessary to reduce the thickness of the reflective film 114 while improving the reflectivity, the number of first anti-reflection films 1141 can be reduced. Similarly, when a second anti-reflection film 1145 is provided on the side of the second protective film 1144 facing away from the aluminum film 1143, a plurality of second anti-reflection films 1145 may also be provided to improve the reflectivity of the reflective film 114, so as to facilitate the detection of the parameters of the reflective film 114 from the side of the reflective film 114 facing away from the prism 113.

[0057] Of course, the above embodiments are only partial examples of the reflective film 114 , and there may be other options for the film layer structure of the reflective film 114 and the thickness setting of each film layer, as long as the reflectivity of the light on the reflective surface of the prism 113 can be improved, thereby improving the light utilization efficiency of the shooting module 11 .

[0058] Please refer to Figure 2As shown, when the prism 113 has a first reflecting surface 1131, a second reflecting surface 1132 and a third reflecting surface 1133, the prism 113 can be a triangular prism, and the angle between the first reflecting surface 1131 and the second reflecting surface 1132 and the third reflecting surface 1133 is not limited to 30°, but can be any angle less than 45°, as long as the prism 113 can guide at least the light from the lens 111 to the image sensor 112.

[0059] In one embodiment, the prism 113 is a triangular prism. The prism 113 may include a single integrated or a combination of multiple sub-prisms. Optionally, the prism 113 is formed by connecting two sub-prisms together by optical gluing, and the sub-prism gluing method can provide an aperture screen at the interface of the two sub-prisms to reduce or mitigate stray light.

[0060] Figure 2 The prism 113 shown can reflect at least part of the light three times and then project it onto the image sensor 112. The prism 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 prism 113 can also deflect the light more times to further extend the propagation path of the light in the prism 113, so as to adapt to the telephoto design of the lens 111.

[0061] For example, refer to Figure 8 As shown, in some embodiments, the prism 113 includes a fourth reflective surface 1134 and a fifth reflective surface 1135 that are arranged opposite to each other, and the prism 113 also includes a sixth reflective surface 1136 and a seventh reflective surface 1137 that are arranged opposite to each other. The fourth reflective surface 1134 is arranged opposite to the light-emitting side of the lens 111, and the fifth reflective surface 1135 is arranged 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.

[0062] In some embodiments, the prism 113 may be a quadrangular prism, the sixth reflection surface 1136 and the seventh reflection surface 1137 are parallel to each other and perpendicular to the optical axis of the lens 111, the fourth reflection surface 1134 and the fifth reflection surface 1135 are parallel to each other, the angle between the fourth reflection surface 1134 and the sixth reflection surface 1136 is 30°, and the angle between the fifth reflection surface 1135 and the seventh reflection surface 1137 is 30°. Of course, the angle setting of the prism 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.

[0063] Figure 8 In the illustrated embodiment, the prism 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 prism 113, which is conducive to adapting to the lens 111 with a higher magnification. For example, Figure 8 The prism 113 in the embodiment shown can be used for the lens 111 with a magnification of 3 times to 10 times (equivalent focal length is approximately 65 mm to 200 mm). Figure 8 In the embodiment shown, the reflective film 114 on the fourth reflective surface 1134 and the fifth reflective surface 1135 may be Figure 3 , Figure 5 and Figure 8 The reflective film 114 in any corresponding embodiment can improve the reflectivity of the light on the fourth reflective surface 1134 and the fifth reflective surface 1135, thereby improving the light utilization efficiency of the shooting module 11, and the incident angles of the light on the sixth reflective surface 1136 and the seventh reflective surface 1137 meet the requirements of the critical angle of total reflection, and the light can be totally reflected on the sixth reflective surface 1136 and the seventh reflective surface 1137.

[0064] refer to Fig. 9 , Fig. 9 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 Fig. 9 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.

[0065] 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.

[0066] 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.

[0067] 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.

[0068] 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 Fig. 9 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.

[0069] 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.

[0070] 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.

[0071] 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. Fig. 9 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.

[0072] 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.

[0073] 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.

[0074] although Fig. 9 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.

[0075] 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.

[0076] 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 reflective film, characterized in that: The reflective film includes a first anti-reflection film, a first protective film, an aluminum film and a second protective film which are stacked in sequence. The first anti-reflection film includes a silicon dioxide layer and a titanium dioxide layer arranged on the silicon dioxide layer facing the first protective film. The first protective film and the second protective film both include an aluminum oxide layer attached to the aluminum film.

2. The reflective film according to claim 1, characterized in that The first protection film further includes a silicon dioxide layer disposed on the aluminum oxide layer and facing away from the aluminum film.

3. The reflective film according to claim 2, characterized in that The thickness of the silicon dioxide layer in the first protection film is smaller than the thickness of the silicon dioxide layer in the first anti-reflection film.

4. The reflective film according to claim 1, characterized in that The second protective film further includes a silicon dioxide layer attached to a side of the aluminum oxide layer facing away from the aluminum film.

5. The reflective film according to claim 1, characterized in that A plurality of the first anti-reflection films are provided, and the plurality of the first anti-reflection films are sequentially stacked and arranged on a side of the first protective film facing away from the aluminum film.

6. The reflective film according to claim 1, characterized in that The reflective film further includes a second anti-reflection film disposed on a side of the second protective film facing away from the aluminum film, and the second anti-reflection film includes a silicon dioxide layer and a titanium dioxide layer disposed on a side of the silicon dioxide layer facing the second protective film.

7. The reflective film according to claim 1, characterized in that The thickness of the aluminum film is 80nm-120nm.

8. The reflective film according to claim 1, characterized in that The thickness of the silicon dioxide layer is 12nm-200nm, and the thickness of the titanium dioxide layer is 6nm-150nm.

9. A reflective component, characterized in that: It includes a prism and a reflective film as described in any one of claims 1 to 8, wherein the prism has a reflective surface, the prism is used to receive light and reflect at least part of the light incident on the reflective surface, the reflective film is arranged on the reflective surface, and the first anti-reflection film is arranged on the side of the aluminum film facing the prism.

10. The reflective assembly according to claim 9, characterized in that: The refractive index of the prism is 1.5-2.

11. A shooting module, characterized in that: The invention comprises an image sensor and the reflective assembly as claimed in claim 9 or 10, wherein at least part of the light reflected at the reflective surface of the prism is incident on the image sensor.

12. The shooting module according to claim 11, characterized in that: The shooting module also includes a lens for collecting light, and the lens and the image sensor are arranged on the same side of the prism. The prism includes a first reflection surface and a second reflection surface, and the first reflection surface and the second reflection surface are both provided with a reflection film. The lens can project at least part of the collected light onto the first reflection surface, and the prism can transmit at least part of the light reflected at the first reflection surface to the second reflection surface, and the second reflection surface can reflect at least part of the light to the image sensor.

13. The shooting module according to claim 12, characterized in that: The prism further includes a third reflective surface facing the lens and the image sensor, the first reflective surface can reflect at least part of the light to the third reflective surface, and the third reflective surface can reflect at least part of the light to the second reflective surface.

14. The shooting module according to claim 11, characterized in that: The shooting module also includes a lens for collecting light, the prism includes a fourth reflection surface and a fifth reflection surface that are arranged opposite to each other, and a sixth reflection surface and a seventh reflection surface that are arranged opposite to each other, the fourth reflection surface is arranged opposite to the light exit side of the lens, the fifth reflection surface is arranged opposite to the photosensitive surface of the image sensor, the reflection film is provided on the fourth reflection surface and the fifth reflection surface, the fourth reflection surface can reflect at least part of the light to the sixth reflection surface, the sixth reflection surface can reflect at least part of the light to the seventh reflection surface, and the seventh reflection surface can reflect at least part of the light to the fifth reflection surface.

15. An electronic device, characterized in that: Comprising a shooting module as described in any one of claims 11-14.

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