Reflector, head-up display system and vehicle

Abstract

The invention relates to the technical field of head-up displays, in particular to a reflecting part, a head-up display system and a vehicle. The reflecting part comprises a substrate, a transflective film and a first antireflection film, the reflectivity of the transflective film to first polarized light is larger than that of the transflective film to second polarized light, the first antireflection film is located on one side of the substrate, the transflective film is located in the substrate, or the transflective film is located on the other side of the substrate, and the first antireflection film is located in the substrate. Or the transflective film is located between the first antireflection film and the substrate. By arranging the transflective film, when the light is reflected, the reflectivity for the first polarized light is greater than the reflectivity for the second polarized light, so that when the image light of the image source is the first polarized light, the reflectivity for the first polarized light can be improved, and the display effect and the display brightness of the image are improved. And by arranging the first antireflection film, the light transmission amount of the reflecting piece is increased, and the imaging definition is further improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of head-up displays, and in particular to a reflector, a head-up display system and a vehicle. Background Art

[0002] HUD (head up display) is also called a head-up display. By projecting the light emitted by the HUD image source onto the imaging window (rear-mounted imaging board or vehicle windshield, etc.), the user can directly see the image without lowering his head, thereby improving the user experience. For example, in some cases, the driver can avoid being distracted by looking down at the dashboard while driving, thereby improving the driving safety factor and also providing a better driving experience.

[0003] In the prior art, projection devices using window glass are common in the vehicle field as so-called head-up displays (HUDs). Thus, important information can be projected into the driver's field of vision, such as the current driving speed, navigation or warning prompts, and the driver can perceive this information without having to take his eyes off the lane.

[0004] However, the image light of the head-up display device will be reflected when passing through the two surfaces of the window glass and the air, and the reflected images on the two surfaces may be offset to form two double images that interfere with each other, thereby affecting the display clarity of the image. Summary of the invention

[0005] In order to solve the above technical problems or at least partially solve the above technical problems, the present disclosure provides a reflector, a head-up display system and a vehicle.

[0006] The present disclosure provides a reflective member, comprising a substrate, a transflective film and a first anti-reflective film, wherein the reflectivity of the transflective film to a first polarized light is greater than the reflectivity to a second polarized light, the first anti-reflective film is located on one side of the substrate, the transflective film is located inside the substrate, or the transflective film is located on the other side of the substrate, or the transflective film is located between the first anti-reflective film and the substrate.

[0007] Optionally, the substrate includes:

[0008] A plurality of sub-substrates arranged in a stacked manner; and

[0009] The middle layer is arranged between every two adjacent sub-substrates among the plurality of sub-substrates, wherein the transflective film is located between one of the plurality of sub-substrates and the middle layer, and the middle layer is a thermoplastic polymer film.

[0010] Optionally, the reflector further includes:

[0011] The second anti-reflection film is located on a side of the substrate away from the first anti-reflection film.

[0012] Optionally, the reflector further includes:

[0013] The first protective film is located on a side of the first anti-reflection film away from the substrate when the transflective film and the first anti-reflection film are arranged opposite to each other on both sides of the substrate.

[0014] Optionally, the reflector further includes:

[0015] A second protective film is located on a side of the first anti-reflection film away from the substrate.

[0016] Optionally, the reflective film includes a first film layer portion and a second film layer portion which are stacked, the first film layer portion is located at least on one side of the second film layer portion, the first film layer portion includes a first dielectric layer or a second dielectric layer or first dielectric layers and second dielectric layers which are alternately arranged, the second film layer portion includes a metal layer and the first dielectric layer and / or the second dielectric layer which are arranged on both sides of the metal layer, and the refractive index of the first dielectric layer is not equal to the refractive index of the second dielectric layer.

[0017] Optionally, the first polarized light is P polarized light, the second polarized light is S polarized light, and when the transflective film is within a first incident angle range, within at least half of a wavelength range of 390-780nm, the reflectivity of the transflective film to the first polarized light is greater than or equal to 20%, and the reflectivity to the second polarized light is less than 20%.

[0018] Optionally, when the first transflective film is within the second incident angle range, the reflectivity fluctuation range of the first polarized light within the wavelength range of 390-780 nm is less than 30%.

[0019] Optionally, when the first reflective film is within a third incident angle range, the average reflectivity of the first polarized light in the wavelength range of 420-490nm is a first reflectivity, the average reflectivity of the first polarized light in the wavelength range of 500-560nm is a second reflectivity, and the average reflectivity of the first polarized light in the wavelength range of 580-630nm is a third reflectivity, wherein the difference between the first reflectivity, the second reflectivity and the third reflectivity is less than or equal to 10%.

[0020] Optionally, the refractive index of the first medium layer is greater than or equal to 2.0, and the refractive index of the second medium layer is less than or equal to 1.7; and / or,

[0021] The number of the first dielectric layers in the first film layer portion is less than or equal to 10, and the number of the second dielectric layers is less than or equal to 10; and / or,

[0022] The thickness of the first dielectric layer in the first film layer portion is between 10 nm and 100 nm, and the thickness of the second dielectric layer in the first film layer portion is between 15 nm and 150 nm.

[0023] Optionally, the metal layer includes at least one of a silver reflective layer, a gold reflective layer, a copper reflective layer and an aluminum reflective layer; and / or the single layer thickness of the metal layer is 1 nm to 50 nm.

[0024] Optionally, the first antireflection film includes at least one first unit layer and at least one second unit layer alternately arranged, the refractive index of the first unit layer is in the range of 2≤n3≤2.5, and the refractive index of the second unit layer is in the range of 1.2≤n4≤1.7; and / or,

[0025] The number of the first unit layers is less than or equal to 10, and the number of the second unit layers is less than or equal to 10; and / or,

[0026] The thickness of the first unit layer is in a range of 10 nm to 150 nm, and the thickness of the second unit layer is in a range of 10 nm to 150 nm; and / or,

[0027] The material of the first unit layer includes an inorganic metal compound, and the material of the second unit layer includes an inorganic oxide.

[0028] Optionally, the first protective film is an anti-fingerprint film or a hardening film; and / or,

[0029] The thickness of the first protective film is less than or equal to 50 nm; and / or,

[0030] The refractive index of the first protective film is in the range of 1.3 to 1.5; and / or,

[0031] A ratio of a refractive index of the first antireflection film to a refractive index of the first protective film is greater than or equal to 0.8 and less than or equal to 1.2.

[0032] Optionally, the substrate includes a first glass plate, a second glass plate and an intermediate layer, the transflective film is arranged on the inner surface of the second glass plate, the second glass plate is arranged toward the interior of the vehicle, and the first anti-reflective film and the first protective film are arranged in sequence on the outer surface of the first glass plate; and / or,

[0033] The second anti-reflection film and the second protective film are arranged on a side of the transflective film away from the substrate, and the second anti-reflection film is arranged between the transflective film and the second protective film; and / or,

[0034] The transflective film is arranged between the first glass plate and the intermediate layer or between the second glass plate and the intermediate layer, and the first antireflective film and / or the first protective film are arranged on the outer surface of the first glass plate; and / or the second antireflective film and / or the first protective film are arranged on the outer surface of the second glass plate; and / or,

[0035] The transflective film, the first anti-reflective film and the first protective film are sequentially arranged on the outer surface of the first glass plate, and the second anti-reflective film and / or the second protective film (41) are arranged on the inner surface of the second glass plate.

[0036] Optionally, the second film layer portion further includes a supporting layer, and the supporting layer is disposed on the metal layer and located on at least one side of the metal layer.

[0037] Optionally, the total number of layers of the transflective film is less than or equal to 30, and / or the total thickness of the transflective film is between 100 nm and 800 nm.

[0038] The present disclosure also provides a head-up display system, characterized in that it includes a head-up display and a first external reflector, and the first external reflector is any of the reflectors described above.

[0039] The present disclosure also provides a vehicle, characterized in that it includes any of the reflective elements described above; or, includes a head-up display system as described above.

[0040] Compared with the prior art, the technical solution provided by the embodiments of the present disclosure has the following advantages:

[0041] The reflective element provided in the embodiment of the present disclosure, by providing a transflective film, has a reflectivity of the first polarized light greater than the reflectivity of the second polarized light when reflecting light. In this way, when the image light of the image source is the first polarized light, the reflectivity of the first polarized light can be increased, thereby improving the display effect and display brightness of the image, and at the same time facilitating the elimination of ghosting. Moreover, at large angles of incidence, the generation of ghosting can be reduced or eliminated. By providing a first anti-reflection film, the first anti-reflection film can increase the transmittance, buffer the refractive index between the glass-air interface, and reduce the occurrence of ghosting due to reflection. As a result, the light transmittance of the reflective element is increased, the stray light of the system is reduced or eliminated, and the clarity of the imaging is further improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0043] In order to more clearly illustrate the embodiments of the present invention 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, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0044] Figure 1 and Figure 2 It is a schematic diagram of the structure of the external reflector described in some embodiments of the present disclosure;

[0045] Figures 3 to 6 It is a schematic diagram of the structure of the external reflector described in other embodiments of the present disclosure;

[0046] Figure 7 and Figure 8 It is a schematic diagram of the structure of the external reflector described in some other embodiments of the present disclosure;

[0047] Fig. 9 It is a schematic diagram of the structure of the transflective film described in some embodiments of the present disclosure;

[0048] Fig.10 This is a diagram showing the imaging principle of the reflector in some embodiments of the present disclosure when in use;

[0049] Fig.11 This is a schematic diagram of the structure of the head-up display system described in some embodiments of the present disclosure.

[0050] Among them, 1, the first film layer portion; 2, the second film layer portion; 3, the image source; 4, the imaging screen; 101, the first dielectric layer; 102, the second dielectric layer; 201, the metal layer; 202, the supporting layer; 10, the substrate; 11, the first glass plate; 12, the middle layer; 13, the second glass plate; 20, the transflective film; 30, the first anti-reflection film; 31, the second anti-reflection film; 40, the first protective film; 41, the second protective film. DETAILED DESCRIPTION

[0051] In order to more clearly understand the above-mentioned objectives, features and advantages of the present disclosure, the scheme of the present disclosure will be further described below. It should be noted that the embodiments of the present disclosure and the features in the embodiments can be combined with each other without conflict.

[0052] In the following description, many specific details are set forth to facilitate a full understanding of the present disclosure, but the present disclosure may also be implemented in other ways different from those described herein; it is obvious that the embodiments in the specification are only part of the embodiments of the present disclosure, rather than all of the embodiments.

[0053] like Figures 1 to 8 As shown, the embodiment of the present disclosure provides a reflector, such as Figure 1 , Figure 3or Figure 7 As shown, the reflector includes a substrate 10, a transflective film 20 and a first anti-reflective film 30. The reflectivity of the first transflective film 30 to the first polarized light is greater than the reflectivity of the second polarized light. Figure 3 As shown, the first antireflection film 30 is located on one side of the substrate 10, and the transflective film 20 is located inside the substrate 10. Alternatively, as Figure 1 As shown, the first antireflection film 30 is located on one side of the substrate 10, and the transflective film 20 is located on the other side of the substrate 10. Alternatively, as Figure 7 As shown, the first anti-reflection film 30 is located on one side of the substrate 10, and the transflective film 20 is located between the first anti-reflection film 30 and the substrate 10. For example, the substrate 10 is at least one of the front windshield, side window or skylight glass of the vehicle. By setting the transflective film 20, when reflecting the light, the reflectivity of the first polarized light is greater than the reflectivity of the second polarized light. In this way, when the image source image light is the first polarized light, the display effect and display brightness of the image can be improved, and it is also beneficial to eliminate ghosting. In addition, at a large angle of incidence, the generation of ghosting can be reduced or eliminated. By setting the first anti-reflection film 30, the light transmittance of the substrate 10 is increased, the stray light of the system is reduced or eliminated, and the clarity of the imaging is further improved.

[0054] In some embodiments, the first polarized light is one of P polarized light and S polarized light, and the second polarized light is the other of P polarized light and S polarized light.

[0055] Among them, if the first polarized light is P polarized light, the second polarized light is S polarized light, and the reflectivity of the transflective film to P polarized light is greater than the reflectivity to S polarized light. In other words, the transflective film of the present disclosure is an anti-P polarized light transflective film. When the transflective film 20 is applied to a head-up display system, the image generation unit of the head-up display emits P polarized light, which is beneficial to improving the display brightness and display effect of the image. If the first polarized light is S polarized light, the second polarized light is P polarized light, and the reflectivity of the transflective film 20 to S polarized light is greater than the reflectivity to P polarized light. In other words, the transflective film of the present disclosure is an anti-S polarized light transflective film. When the transflective film 20 is applied to a head-up display system, the image generation unit of the head-up display emits S polarized light, which can further improve the display brightness of the image, thereby helping to improve the display effect.

[0056] For example, when the first polarized light is incident on the transflective film 20 at a large angle, the generation of ghosting can be reduced or eliminated. For example, the transflective film 20 is arranged at the front windshield of the vehicle, and the head-up display includes an image generation unit. When the first polarized light emitted by the image generation unit is P polarized light, when the image light with P polarization characteristics is incident on the windshield at a certain angle in a large incident angle range, a part of the P polarized light incident on the transflective film will become S polarized light. Since the reflectivity of S polarized light is relatively high, the reflectivity of this part of S polarized light on the windshield becomes higher, so that the virtual image generated by the head-up display through the reflection of the transflective film 20 produces a relatively obvious ghosting, thereby affecting the clarity of the virtual image and affecting the speed and accuracy of the user reading information.

[0057] Further, in some embodiments of the present disclosure, the substrate 10 includes a plurality of stacked sub-substrates and an intermediate layer, the intermediate layer is arranged between every two adjacent sub-substrates among the plurality of sub-substrates, wherein the transflective film 20 is located between one of the plurality of sub-substrates and the intermediate layer, and the intermediate layer is a thermoplastic polymer film. For example, in some embodiments of the present disclosure, Figure 3 As shown, the multiple sub-substrates are two sub-substrates, and the sub-substrates are transparent substrates, the two sub-substrates include a first glass plate 11 and a second glass plate 13, wherein the first glass plate 11 is closer to the user than the second glass plate 13, the thickness of the first glass plate is less than the thickness of the second glass plate, and / or at least one of the first glass plate 11, the second glass plate 13 and the intermediate layer 12 is wedge-shaped.

[0058] In other words, when the substrate 10 is glass, it can be laminated glass, and the transflective film 20 can be disposed on the inner and outer surfaces of the glass, between the glass plate and the interlayer, and within the interlayer.

[0059] Further, such as Figure 2 As shown, the reflector also includes a second anti-reflection film 31, and the second anti-reflection film 31 is located on the side of the substrate 10 away from the first anti-reflection film 30. For example, the second anti-reflection film 31 has the same or similar structure as the first anti-reflection film 30, and both can improve the light transmission effect, that is, the first anti-reflection film 31 and the second anti-reflection film 32 are respectively arranged on both sides of the substrate 10 to increase the light transmittance of the reflector, and improve the clarity of imaging while improving the observation effect of the external environment.

[0060] Furthermore, in some embodiments of the present disclosure, the reflective member further includes a first protective film 40. When the transflective film 20 and the first anti-reflection film 30 are disposed opposite to each other on both sides of the substrate 10, the first protective film 40 is located on the side of the first anti-reflection film 30 away from the substrate 10. That is, the first protective film 40 is located on the outside of the first anti-reflection film 30, and the first anti-reflection film 30 is sandwiched between the substrate 10 and the first protective film 40. The first protective film has the effects of oil repellency, water repellency, and scratch resistance, and the first protective film 40 can be used to protect the first anti-reflection film 30.

[0061] In other embodiments, if the reflective element is provided with a second anti-reflection film 31, a second protective film 41 can be provided on the outer side of the second anti-reflection film 31, that is, the second anti-reflection film 31 is sandwiched between the substrate 10 and the second protective film 41, and the second protective film 41 has the same or similar structure as the first protective film 40, and the second protective film 41 has oleophobic, hydrophobic, and anti-scratch effects, and the second anti-reflection film 31 can be protected by the third protective film 41.

[0062] Furthermore, if Fig. 9 As shown, the transflective film 10 includes a first film layer portion 1 and a second film layer portion 2 which are stacked, the first film layer portion 1 is located at least on one side of the second film layer portion 2, the first film layer portion 1 includes a first dielectric layer 101 or a second dielectric layer 102 or first dielectric layers 101 and second dielectric layers 102 which are alternately arranged, the second film layer portion 2 includes a metal layer 201 and the first dielectric layer 101 and / or the second dielectric layer 102 which are arranged on both sides of the metal layer 201, and the refractive index of the first dielectric layer 101 is not equal to the refractive index of the second dielectric layer 102.

[0063] For example, the refractive index of the first dielectric layer 101 is greater than the refractive index of the second dielectric layer 102 .

[0064] When the first polarized light is incident on the transflective film 20 at a large angle, the generation of ghosting can be reduced or eliminated. The "large incident angle range" mentioned above can be 20 degrees to 70 degrees, and a specific angle can be 20 degrees or 70 degrees.

[0065] The thickness of the metal layer 201, the first sub-medium layer 101 and the second sub-medium layer 102 are all in nanometer level, and the transflective film 20 has high light transmittance. In this way, when the transflective film 20 is applied to a head-up display system and a vehicle, it will not prevent the user from seeing the target object in the external environment clearly.

[0066] In the disclosed embodiment, an alternating structure of high and low refractive index dielectric layers, that is, a combination of parameters such as the number of high and low refractive index layers and the thickness variation of each layer is used to adjust so as to obtain a higher P-light reflectivity and a lower S-light reflectivity. As a result, the reflectivity of the vehicle glass provided with a P-light transflective film to the incident P-light can be greatly improved, and the reflectivity to the incident S-light can be reduced. As a result, the generation of ghosting can be reduced or eliminated at a wide range of incident angles. This improves the clarity of the image on the vehicle glass and enhances the user experience. Furthermore, the transflective film can be provided on the side windows of the front row of the vehicle, the side windows of the rear row of the vehicle, the windshield of the vehicle's skylight glass, etc., to increase the versatility and entertainment of the head-up display system and enhance the user experience.

[0067] Further, in some embodiments of the present disclosure, the refractive index of the first dielectric layer 101 is greater than the refractive index of the second dielectric layer 102. The refractive index of the first dielectric layer 101 and the refractive index of the second dielectric layer 102 are related to the materials of the first dielectric layer 101 and the second dielectric layer 102. In some embodiments of the present disclosure, the material of the first dielectric layer 101 is Ta2O5 (tantalum pentoxide), the refractive index of Ta2O5 is 2.05 to 2.25, and the refractive index is preferably 2.1. Of course, the material of the first dielectric layer 101 can also be selected from TiO2 (antimony oxide), Ti3O5 (antimony pentoxide), Nb2O5 (niobium pentoxide) or H4 (lanthanum titanate), among which the refractive index of TiO2 (antimony oxide) is 2.35±0.5, the refractive index of Ti3O5 (antimony pentoxide) is 2.35±0.5, the refractive index of Nb2O5 (niobium pentoxide) is 2.35±0.5, and the refractive index of H4 (lanthanum titanate) is 2.05±0.5. The material of the second dielectric layer 102 can be SiO2 (silicon dioxide), and the refractive index of silicon dioxide is 1.45 to 1.49, preferably 1.47. As an alternative material for the second dielectric layer 102, (silicon aluminum mixture) can also be selected, and the refractive index of Al2O3 is 1.64±0.3, and the refractive index of SiAl mixture is 1.5±0.2.

[0068] For example, the materials of different first dielectric layers 101 can be the same or different, and the materials of different second dielectric layers 102 can also be the same or different. By designing the number and thickness of dielectric layers with different refractive indices, a transflective film with specific polarization characteristics can be obtained.

[0069] Further, in some embodiments of the present disclosure, both sides of the metal layer 201 are the first dielectric layer 101 or the second dielectric layer 102, that is, the dielectric layers on both sides of the metal layer 201 are the same, and can be both the first dielectric layer 101 or both the second dielectric layer 102. The metal layer 201 can be one layer or multiple layers, and at least one side of each metal layer 201 is provided with the first dielectric layer 101 or the second dielectric layer 102. The material of the metal layer 201 is preferably silver, and the thickness of each metal layer 201 is 1nm-50nm, preferably 15nm-30nm. Taking the case where the first dielectric layer 101 is provided on both sides of the metal layer 201 as an example, the thickness of the first dielectric layer 101 on both sides is between 10nm-100nm.

[0070] For example, in some embodiments of the present disclosure, the number of layers of the first dielectric layer 101 and the second dielectric layer 102 in the first film layer portion 1 is equal, and the total number of layers of the first film layer portion 1 is less than or equal to 20. Therefore, the number of layers of the first dielectric layer 101 in the first film layer portion 1 is less than or equal to 10, and the number of layers of the second dielectric layer 102 in the first film layer portion 1 is less than or equal to 10. In this way, the transflective film 1 has a fewer film layer structure, and can still adjust the reflectivity of P-polarized light and S-polarized light to obtain a higher reflectivity of P-polarized light and a lower reflectivity of S-polarized light, which not only simplifies the film layer structure and reduces the film layer thickness, but also helps to reduce costs.

[0071] Preferably, the number of the first dielectric layer 101 is less than or equal to 5, and the number of the second dielectric layer 102 is less than or equal to 5.

[0072] Further, in some embodiments of the present disclosure, the thickness of the first dielectric layer 101 in the first film layer portion 1 is between 10 nm and 100 nm, and the thickness of the second dielectric layer 102 in the first film layer portion 1 is between 15 nm and 150 nm. The thickness of the first dielectric layer in different layers may be different, and the thickness of the second dielectric layer in different layers may also be different.

[0073] For example, the minimum thickness of the first dielectric layer 101 in the first film layer portion 1 is smaller than the minimum thickness of the second dielectric layer 102 in the first film layer portion 1 , and the maximum thickness of the first dielectric layer 101 in the first film layer portion 1 is smaller than the maximum thickness of the second dielectric layer 102 in the first film layer portion 1 .

[0074] Furthermore, in some embodiments of the present disclosure, the thickness of the first dielectric layer 101 and the second dielectric layer 102 in the second film layer portion 2 gradually decreases in the direction away from the first film layer portion 1. Taking the example of providing the first dielectric layer 101 on both sides of the metal layer 201, the thickness of the first dielectric layer 101 close to the first film layer portion 1 is greater than the thickness of the first dielectric layer 101 away from the first film layer portion 1. Preferably, the difference in thickness between the two first dielectric layers 101 is less than 50 nm.

[0075] Further, in some embodiments of the present disclosure, the second film layer portion 2 further includes a support layer 202, which is disposed on the metal layer 201 and is located on at least one side of the metal layer 201. Specifically, the material of the support layer 202 can be Al2O3, and the support layer 202 is provided to improve the adhesion of the metal layer 201 and to improve the internal structural force and structural strength of the transflective film. The thickness of the support layer 202 is between 10nm and 100nm, preferably 20nm to 50nm.

[0076] Furthermore, in some embodiments of the present disclosure, the total number of layers of the transflective film is less than or equal to 30, and the total thickness of the transflective film is between 100 nm and 800 nm, preferably between 300 nm and 500 nm.

[0077] The total number of layers of the first transflective film is the sum of the number of layers of all the film layers in the transflective film, that is, the total number of layers of the transflective film is equal to the sum of the number of first dielectric layers, the number of second dielectric layers, the number of metal layers and the number of supporting layers.

[0078] Further, in some embodiments of the present disclosure, the first polarized light is P polarized light, the second polarized light is S polarized light, and the reflective film 20 has a reflectivity greater than or equal to 20% for the first polarized light and a reflectivity less than 20% for the second polarized light in at least half of the wavelength range of 390nm to 780nm when the first incident angle ranges. The reflective film 20 of the present solution can ensure that the reflectivity of p polarized light is above 20% when the first incident angle ranges from 20 degrees to 70 degrees. For example, when the incident angle of P polarized light of the reflective film of the present solution is 60 degrees, the reflectivity of P polarized light is greater than 30% and the reflectivity of S polarized light is less than 20% in at least half of the wavelength range of visible light.

[0079] For example, when the incident angle of P polarized light is 50 degrees, the reflectivity of P polarized light is greater than 25% and the reflectivity of S polarized light is less than 20% in at least half of the wavelength range of visible light. For example, when the incident angle of P polarized light is 60 degrees, the reflectivity of P polarized light is greater than 30% in the wavelength range of 400-700nm, and the reflectivity of S polarized light is less than 25% in the wavelength range of 450-600nm.

[0080] It can be understood here that the incident angle of the head-up display device is a fixed preset angle when in use, for example, the incident angle is 50 degrees or 60 degrees; under different use conditions (for example, in different vehicles), the incident angle can be adjusted, for example, the incident angle is 50 degrees in the first vehicle and 60 degrees in the second vehicle. Within the first incident angle range, any incident angle of any value can meet the requirements of the reflectivity of polarized light of the transflective film of the present disclosure.

[0081] For example, when the transflective film is within the second incident angle range, the reflectivity fluctuation range of the first polarized light within the range of 390 nm to 780 nm is less than 30%.

[0082] Among them, the second incident angle range is less than or equal to the first incident angle range, and it is within the first incident angle range, that is, the second incident angle range is included in the first incident angle range. For example, if the first incident angle range is: 20°~70°, then the second incident angle range can be 20°~70°, or 20°~50°, or 50°~70°. The reflectivity fluctuation range refers to the difference between the maximum and minimum reflectivity of the transflective film 20 to P polarized light within the visible light range when the incident angle is within the second incident angle range.

[0083] Exemplarily, when the incident angle is 60°, in the visible light range (wavelength range of 390nm to 780nm), the fluctuation range of the reflectivity of the transflective film 20 to P polarized light is less than 10%, and in the wavelength range of 400nm to 600nm, the fluctuation range of the reflectivity of the transflective film 20 to P polarized light is less than 5%.

[0084] For example, when the transflective film 20 is within the third incident angle range, the average reflectivity of the first polarized light in the wavelength range of 420-490nm is a first reflectivity, the average reflectivity of the first polarized light in the wavelength range of 500-560nm is a second reflectivity, and the average reflectivity of the first polarized light in the wavelength range of 580-630nm is a third reflectivity, wherein the difference among the first reflectivity, the second reflectivity and the third reflectivity is less than or equal to 10%.

[0085] The third incident angle range is less than or equal to the first incident angle range, and is within the first incident angle range, that is, the third incident angle range is included in the first incident angle range. For example, if the first incident angle range is: 20° to 70°, then the third incident angle range can be 20° to 70°, or 50° to 65°, or 50° to 70°.

[0086] Among them, 420nm to 490nm corresponds to the wavelength range of blue light, 500nm to 560nm corresponds to the wavelength range of green light, and 580nm to 630nm corresponds to the wavelength range of red light. In this way, in different wavelength ranges, the difference in reflectivity of the transflective film 20 to P polarized light is small, that is, the difference in reflectivity to light of different colors is small, and after the image light is reflected by the first transflective film, the color of the image light will not change significantly, which can prevent the image light from color deviation.

[0087] Exemplarily, when the incident angle of the image light is 50°, the reflectivity of the blue light wavelength range (420nm-490nm) is set to 29%±2%, the reflectivity of the green light wavelength range (500nm-560nm) is set to 29%±2%, and the reflectivity of the red light wavelength range (580nm-630nm) is set to 29%±2%. When the incident angle of the image light is 55°, the reflectivity of the blue light wavelength range (420nm-490nm) is set to 30%±2%, the reflectivity of the green light wavelength range (500nm-560nm) is set to 30%±2%, and the reflectivity of the red light wavelength range (580nm-630nm) is set to 30%±2%. When the incident angle of the image light is 60 degrees, the reflectivity of the blue light wavelength range (420nm-490nm) is set to 34%±2%, the reflectivity of the green light wavelength range (500nm-560nm) is set to 34%±2%, and the reflectivity of the red light wavelength range (580nm-630nm) is set to 34%±2%. When the incident angle of the image light is 65 degrees, the reflectivity of the blue light wavelength range (420nm-490nm) is set to 41%±2%, the reflectivity of the green light wavelength range (500nm-560nm) is set to 41%±2%, and the reflectivity of the red light wavelength range (580nm-630nm) is set to 41%±2%.

[0088] For example, for the transflective film 20 of the present embodiment, when the incident angle is 60 degrees, the fluctuation range of the p-polarized light reflectivity in the visible light range is less than 10%, and in the range of 400-600 nm, the fluctuation range of the p-polarized light reflectivity is less than 5%.

[0089] That is to say, to address the color shift problem, when the incident angle of the image light is 60°, the reflectivity of the blue area 420-490nm is set to 34%±2%, the reflectivity of the green area 500-560nm is set to 34%±2%, and the reflectivity of the red area 580-630nm is set to 34%±2%.

[0090] To address the color shift problem, when the incident angle of the image light is 50 degrees, the reflectivity of the blue area, green area and red area are set to 29%±2% respectively; when the incident angle of the image light is 55 degrees, the reflectivity of the blue area, green area and red area are set to 30%±2% respectively; when the incident angle of the image light is 65 degrees, the reflectivity of the blue area, green area and red area are set to 41%±2% respectively.

[0091] Further, in some embodiments of the present disclosure, the first anti-reflection film 30 includes at least one first unit layer and at least one second unit layer alternately arranged, the refractive index of the first unit layer is in the range of 2≤n3≤2.5, and the refractive index of the second unit layer is in the range of 1.2≤n4≤1.7; and / or, the number of first unit layers is less than or equal to 10, and the number of second unit layers is less than or equal to 10; and / or, the thickness of the first unit layer is in the range of 10nm to 150nm, and the thickness of the second unit layer is in the range of 10nm to 150nm; and / or, the material of the first unit layer includes an inorganic metal compound, and the material of the second unit layer includes an inorganic oxide.

[0092] For example, the third layer and the fourth layer are both anti-reflection coatings. Therefore, the first anti-reflection film 30 and the second anti-reflection film 31 respectively include a multilayer anti-reflection coating. The multilayer anti-reflection coating may include a first anti-reflection coating (i.e., a first unit layer) and a second anti-reflection coating (i.e., a second unit layer) alternately stacked, wherein the refractive index of the first anti-reflection coating is greater than the refractive index of the second anti-reflection coating. The anti-reflection coating can suppress reflection on the glass surface.

[0093] It should be noted that, when the anti-reflection film (for example, the first anti-reflection film 30 or the second anti-reflection film 31) includes a plurality of first unit layers, the refractive indices of the plurality of first unit layers may be all the same, or partially the same, or completely different. For example, the anti-reflection film includes two first unit layers, and the refractive indices of the two first unit layers may be the same or different. Similarly, when the anti-reflection film includes a plurality of second unit layers, the refractive indices of the plurality of second unit layers may be all the same, or partially the same, or completely different. For example, the anti-reflection film includes two second unit layers, and the refractive indices of the two second unit layers may be the same or different.

[0094] For a first unit layer, the refractive index of the entire first unit layer can be the same refractive index, or the first unit layer can include multiple parts with different refractive indices; for a second unit layer, the refractive index of the entire second unit layer can be the same refractive index, or the second unit layer can include multiple parts with different refractive indices.

[0095] For example, the first anti-reflection film 30 is a multilayer film system composed of multiple layers of materials with different refractive indices, wherein the refractive index of the first unit layer is in the range of 2≤n3≤2.5, the refractive index of the second unit layer is in the range of 1.2≤n4≤1.7, and the refractive index of the outermost film layer in the first anti-reflection film 30 is 1.37-1.57, preferably 1.47.

[0096] In some embodiments of the present disclosure, the first antireflection film 30 is an antireflection coating that suppresses reflection on the glass surface. In a preferred embodiment, the antireflection coating is composed of two high refractive layers with a refractive index greater than 1.8 and two low refractive layers with a refractive index less than 1.8.

[0097] Furthermore, in some embodiments of the present disclosure, the first protective film 40 is an anti-fingerprint film or a hardening film; and / or the thickness of the first protective film 40 is less than or equal to 50 nm; the refractive index of the first protective film 40 ranges from 1.3 to 1.5, and the ratio of the refractive index of the first anti-reflection film 30 to the refractive index of the first protective film 40 is greater than or equal to 0.8 and less than or equal to 1.2.

[0098] In some embodiments, the refractive index of the first protective film 40 and the refractive index of the second protective film 41 are both in the range of 1.3 to 1.5. That is, the refractive index of the first protective film 40 and the refractive index of the second protective film 41 are both greater than or equal to 1.3 and less than or equal to 1.5. Preferably, the refractive index of the first protective film 40 and the refractive index of the second protective film 40 are both about 1.4.

[0099] In some embodiments, the ratio of the refractive index of the first antireflection film 30 to the refractive index of the first protective film 40 is greater than or equal to 0.8 and less than or equal to 1.2. In this way, the refractive indexes of the antireflection film and the protective film are close, which can reduce the reflection of the surface between the two.

[0100] Specifically, in a preferred embodiment, the first protective film 40 is a low surface energy film layer, and the material of the low surface energy film layer is selected from at least one of R1-Si(OR2)3 or Si(R3)mX4-m, wherein R1 is an organic group in which at least one H atom is replaced by F or Cl, R2 and R3 are organic groups, X is F or Cl, and 1≤m≤3; the surface energy of the low surface energy film layer is ≤0.3Jm(-2), its refractive index is ≤1.6, its contact angle with deionized water is >90 degrees, and its geometric thickness is 1 to 5nm.

[0101] Further, R1-Si(OR2)3 is selected from at least one of heptadecafluorodecyltrimethoxysilane, tridecafluorooctyltriethoxysilane, tridecafluoroalkylpropyltrimethoxysilane, dodecafluoroalkyltrimethoxysilane and trifluoropropyltrimethoxysilane.

[0102] Further, Si(R3)mX4-m is selected from at least one of methyltrichlorosilane, methyldodecyldichlorosilane, dimethyldichlorosilane, methylphenyldichlorosilane, methylvinyldichlorosilane or 3-trifluoropropyltrichlorosilane.

[0103] In some embodiments, Figure 3As shown, the substrate 20 includes a first glass plate 11 , a second glass plate 13 and an intermediate layer 12 . The second glass plate 13 is arranged toward the interior of the vehicle, the first glass plate 11 is arranged toward the exterior of the vehicle, and the intermediate layer 12 is sandwiched between the first glass plate 11 and the second glass plate 13 .

[0104] In some embodiments of the present disclosure, the following relationship exists between the anti-reflective film, the anti-reflective film and the protective film:

[0105] In some embodiments, the relationship between the transflective film 20 and the first protective film is as follows. In order to eliminate the problem of double images of the vehicle glass, a P-light transflective film 20 is set on the side of the vehicle glass close to the human eye (that is, the outer surface of the second glass plate), and the image source of the head-up display in the head-up display system is set to emit P polarized light. On the side of the P-light transflective film 20 close to the human eye, there is a first protective film 40, which has the characteristics of oleophobic, hydrophobic, and scratch-resistant. The first protective film 40 can ensure that the inner surface of the vehicle glass is difficult to be stained with fingerprints or other dirt, and keep the outer surface of the second glass plate 13 clean; alternatively, the P-light transflective film 20 can also be set on the outer surface of the first glass plate 11, and the first protective film 40 is set on the outer surface of the P-light transflective film 20 (the side close to the air).

[0106] In some embodiments, the relationship between the P-light reflective film 20 and the anti-reflection film and the protective film is as follows.

[0107] In some embodiments of the present disclosure, the transflective film 20 is disposed on the inner surface of the second glass plate 13, and the outer surface of the first glass plate 11 is sequentially provided with the first anti-reflective film 30 and the first protective film 40 from the inside to the outside. Figure 1 As shown, the image source of the head-up display emits P polarized light, and the innermost surface of the substrate 10 (the inner surface of the second glass plate 13) is provided with a P polarized transflective film 20; the outermost surface of the substrate 10 (the outer surface of the first glass plate 11) is provided with a first anti-reflection film 30, and the outer side of the first anti-reflection film 30 is provided with a first protective film 40.

[0108] Furthermore, the P-polarized transflective film 20 can be attached or coated on the substrate 10; the first anti-reflection film 30 is coated or attached to the outermost surface of the substrate 10; the first protective film 40 is coated or attached to the surface of the first anti-reflection film 30, and the first protective film 41 is scratch-resistant and hydrophobic, and has a small thickness. The thickness of the first protective film 40 is less than or equal to 10nm, for example, it can be 2-3nm, or less than 5nm, which basically will not affect the function of the first anti-reflection film 30.

[0109] Furthermore, a second anti-reflection film 31 and / or a second protective film 41 is arranged on the side of the transflective film 20 away from the substrate 10, and the second anti-reflection film 31 is arranged between the transflective film 20 and the second protective film 41, that is, the transflective film 20, the second anti-reflection film 31 and the second protective film 41 are arranged once on the innermost surface of the substrate 10 along the direction from the outside to the inside.

[0110] In other embodiments of the present disclosure, the transflective film 20 is disposed between the first glass plate 11 and the intermediate layer 12, or between the second glass plate 13 and the intermediate layer 12, or between multiple layers of intermediate layers 12, and the first antireflective film 30 and / or the first protective film are disposed on the outer surface of the first glass plate 11 and the inner surface of the second glass plate 13. Specifically, as Figure 3 and 4 As shown, the image source of the head-up display emits P polarized light, the substrate is a composite glass plate, including an outer first glass plate 11, an inner second glass plate 13 and an interlayer 12, a P polarized transflective film 20 is arranged on the inner surface of the first glass plate 11 or the outer surface of the second glass plate 13; the outermost surface of the reflector (the outer surface of the first glass plate 11) is provided with a first anti-reflection film 30, and the outer side of the first anti-reflection film 30 is provided with a first protective film 41. The innermost surface of the reflector (the inner surface of the first glass plate 11) is provided with a second anti-reflection film 31.

[0111] Furthermore, the P polarization transflective film 20 can be attached or coated between the glass plate and the intermediate layer 12; the first anti-reflection film 30 is coated or attached to the outermost surface of the reflector; the first protective film 40 is coated or attached to the surface of the first anti-reflection film 30, and the first protective film 40 is scratch-resistant and hydrophobic, with a small thickness of 2-3nm, or less than 5nm, and basically does not affect the function of the first anti-reflection film 30. The first anti-reflection film 30 is also disposed on the innermost surface of the reflector by coating or attaching.

[0112] Furthermore, if Figure 5 As shown in FIG. 6 , the innermost surface of the reflector (the inner surface of the second glass) is also provided with a second antireflection film 31 , and the outer surface of the second antireflection film 31 is provided with a second protective film 41 .

[0113] In some other embodiments of the present disclosure, the transflective film 20, the first anti-reflective film 30 and the first protective film 40 are sequentially arranged on the outer surface of the first glass plate 11 from the inside to the outside. Figure 7 As shown, the P polarized transflective film 20 is arranged on the outermost side of the reflector (the outer surface of the first glass plate 11); the outer surface of the P polarized transflective film 20 is provided with a first anti-reflection film 30, and the outer side of the first anti-reflection film 30 is provided with a first protective film 40. The innermost surface of the reflector (the inner surface of the second glass plate 13) is also provided with a second anti-reflection film 31.

[0114] Furthermore, a second anti-reflection film 31 and / or a second protective film 41 is also disposed on the inner surface of the second glass plate 13 .

[0115] like Figure 7 and Figure 8 As shown, the innermost surface of the reflector (the inner surface of the second glass plate 13 ) is also provided with a second anti-reflection film 31 , and a second protective film 41 is provided on the outer side of the second anti-reflection film 31 .

[0116] Further, in some embodiments of the present disclosure, the second film layer component 2 further includes a support layer 202, which is disposed on the metal layer 201 and is located on at least one side of the metal layer 201. Specifically, the material of the support layer 202 can be Al2O3, and the support layer 202 is provided to improve the adhesion of the metal layer 201 and to improve the internal structural force and structural strength of the transflective film 20. The thickness of the support layer 202 is between 10nm and 100nm, preferably between 20nm and 50nm.

[0117] Furthermore, in some embodiments of the present disclosure, the total number of layers of the transflective film 20 is less than or equal to 30, and the total thickness of the transflective film 20 is between 100 nm and 800 nm, preferably between 300 nm and 500 nm.

[0118] The total number of layers of the transflective film is the sum of the number of layers of all the film layers in the transflective film, that is, the total number of layers of the transflective film is equal to the sum of the number of first dielectric layers, the number of second dielectric layers, the number of metal layers and the number of supporting layers.

[0119] Furthermore, in some embodiments of the present disclosure, a head-up display system is provided, including a head-up display and a first external reflector, wherein the first external reflector is the reflector in the above-mentioned embodiment.

[0120] Combination Fig.10 As shown, the image light emitted by the image source of the head-up display is projected onto the vehicle glass, and the vehicle glass reflects the image light to a designated area to form an eye box area, which is used to view the imaged picture in the eye box area along the reverse extension line direction of the image light. By adding a transflective film 20, a first anti-reflective film 30 and a second protective film 40 to the vehicle glass, the image of the head-up display can be made clearer and ghosting can be avoided.

[0121] Furthermore, an embodiment of the present disclosure provides a means of transportation, including the above-mentioned reflective element, or including the head-up display system in the above-mentioned embodiment.

[0122] It should be noted that the polarization characteristics of the transflective film correspond to the polarization characteristics of the image light emitted by the image source. The image source of the head-up display emits S-polarized light, and the transflective film reflects S-polarized light; or, the image source emits P-polarized light, and the transflective film reflects P-polarized light; or, the image source emits S-polarized light + P-polarized light, and the transflective film reflects S-polarized light and / or P-polarized light. P light and S light are two different polarized lights. S light refers to polarized light whose vibration direction is perpendicular to the incident plane, also known as transverse polarized light, and P light refers to polarized light whose vibration direction is parallel to the incident plane, also known as longitudinal polarized light.

[0123] If the image source is a liquid crystal screen, the image source emits P polarized light, and the transflective film is a P-light transflective film, which can reflect both P light and S light, and the reflectivity of the transflective film to P light is higher and the reflectivity to S light is lower, for example, the reflectivity of the transflective film to P light is greater than the reflectivity of the transflective film to S light. In this way, when the image source image light is P light, the display effect and display brightness of the image can be improved, and it is also beneficial to eliminate ghosting. Moreover, at a large angle of incidence, the generation of ghosting can be reduced or eliminated.

[0124] The imaging light emitted by the image source of the head-up display may be incident on a reflective member (eg, a front windshield), thereby forming an image using the reflective member.

[0125] The head-up display may include one or more reflective elements, which may be curved mirrors or plane mirrors, and at least one reflective element is a curved mirror; that is, the head-up display includes one or more curved mirrors, or includes a curved mirror and a plane mirror, or includes a curved mirror and multiple plane mirrors, etc. Specifically, the curved mirror may be a free-form mirror, a spherical mirror, a hyperbolic mirror, a parabolic mirror, etc.

[0126] Specifically, the image source can emit light with specific polarization characteristics. For example, an LCD (Liquid Crystal Display) image source can emit linearly polarized light with a specific polarization direction. A DLP (Digital Light Processing) image source, an image source composed of a diffuser and a backlight module, etc. can all emit specific polarized light.

[0127] For example, the imaging light emitted by the image source can be linearly polarized light of RGB three colors, that is, the image light at this time includes three spectral bands, and the light of each spectral band is linearly polarized light of P polarization. The RGB color mode is a color standard in the industry. It obtains various colors by changing the three color channels of red (R), green (G), and blue (B) and superimposing them on each other. RGB represents the colors of the three channels of red, green, and blue. This standard includes almost all colors that can be perceived by human vision and is one of the most widely used color systems.

[0128] It should be understood that if the optical film is stacked by at least two film layers with different refractive indices, the "different refractive indices" here means that the film layers have different refractive indices in at least one direction in the three directions of xyz; by pre-selecting the required film layers with different refractive indices and stacking the film layers in a pre-set order, an optical film with selective reflection and selective transmission characteristics can be formed, and the optical film can selectively transmit light with the first characteristic and selectively reflect or absorb light with the second characteristic.

[0129] For example, the image source of the head-up display includes a backlight unit and an image generation unit, the backlight unit includes a plurality of backlights, the image generation unit includes a display panel, the display panel includes a plurality of display areas, the plurality of display areas correspond one to one with the plurality of backlights, the control module determines the brightness information corresponding to each display area according to the image to be displayed on the display panel; determines the target brightness corresponding to each backlight according to the brightness information corresponding to each display area; and controls each backlight based on the target brightness corresponding to each backlight. When the head-up display provided by the present disclosure is displaying, the target brightness corresponding to each backlight in the image source is determined according to the image to be displayed, and the backlight is controlled according to the target brightness. By controlling each backlight individually, the light waste caused by lighting all the backlights is avoided, the power consumption is reduced, and the light utilization rate and image contrast are improved.

[0130] For example, according to the distribution of the display content in each display area in the image to be displayed, the display area of ​​the display panel can be divided into a dark area and a brightness area. The dark area is a display area with low display brightness (or no display content), and the bright area is a display area with high display brightness (or display content). The brightness information corresponding to the bright area and the dark area is different, and the target brightness of the backlight determined according to the brightness information is also different, so as to achieve the backlight control of the dark area and the bright area of ​​the image respectively. Since the backlight brightness of the dark area and the brightness is different, the effect of improving the image contrast can be achieved, and then the contrast of the virtual image formed by the head-up display is also improved. At the same time, reducing the brightness of the backlight corresponding to the dark area or turning off the backlight in the dark area can also reduce the backlight power consumption, thereby reducing the overall power consumption of the display panel.

[0131] For example, according to the image to be displayed on the display panel, a pixel group corresponding to each display area is determined, and the pixel group includes multiple pixels. Specifically, the image to be displayed is composed of multiple pixels, each pixel displays a color, and the pixel group in the image to be displayed corresponding to each display area can be determined according to the distribution of the display content in the image to be displayed in each display area, that is, the multiple pixels in the image to be displayed corresponding to each display area. Among them, the display panel includes multiple pixel units, each pixel unit corresponds to a group of three primary color filters, and one pixel in the image to be displayed corresponds to one pixel unit on the display panel.

[0132] For example, Fig.11 As shown, the head-up display utilizes the transflective film 20 provided on the windshield (substrate 10) to reflect the outgoing light of the image source 3, so that the observer can simultaneously observe the virtual image 4 formed on the outside of the windshield and the objects on the outside of the windshield in the eye box area. When displaying, the head-up display system provided by the embodiment of the present disclosure can individually control each backlight for the image to be displayed, thereby avoiding turning on all the backlights, but only turning on some of the backlights, and the luminous brightness of each backlight can also be independently controlled. By controlling the backlights of different areas corresponding to the image to be displayed, it is possible to turn off some of the backlights and light up other backlights, thereby improving the image contrast, thereby improving the contrast of the virtual image formed by the head-up display, and at the same time, it is also possible to reduce the power consumption of the head-up display by turning off some of the backlights or reducing the brightness of some of the backlights.

[0133] The transportation means include but are not limited to vehicles, and also include all transportation means known to those skilled in the art, such as ships, airplanes or spacecraft, etc., which are not limited here.

[0134] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0135] The above description is only a specific embodiment of the present disclosure, so that those skilled in the art can understand or implement the present disclosure. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present disclosure. Therefore, the present disclosure will not be limited to the embodiments described herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A reflector, characterized in that: The invention comprises a substrate (10), a transflective film (20) and a first anti-reflective film (30); the reflectivity of the transflective film (20) to first polarized light is greater than the reflectivity to second polarized light; the first anti-reflective film (30) is located on one side of the substrate (10); the transflective film (20) is located inside the substrate (10); or the transflective film (20) is located on the other side of the substrate (10); or the transflective film (20) is located between the first anti-reflective film (30) and the substrate (10).

2. The reflector according to claim 1, characterized in that: The substrate (10) comprises: A plurality of sub-substrates arranged in a stacked manner; and An intermediate layer is arranged between every two adjacent sub-substrates among the plurality of sub-substrates, wherein the transflective film (20) is located between one of the plurality of sub-substrates and the intermediate layer, and the intermediate layer is a thermoplastic polymer film.

3. The reflector according to claim 1, characterized in that: Also includes: The second anti-reflection film (31) is located on a side of the substrate (10) away from the first anti-reflection film (30).

4. The reflector according to any one of claims 1 to 3, characterized in that: Also includes: A first protective film (40), when the transflective film (20) and the first anti-reflective film (30) are arranged opposite to each other on both sides of the substrate (10), the first protective film (40) is located on a side of the first anti-reflective film (30) away from the substrate (10).

5. The reflector according to any one of claims 1 to 3, characterized in that: Also includes: A second protective film (41), wherein the second protective film (41) is located on a side of the second anti-reflection film (31) away from the substrate (10).

6. The reflector according to claim 1, characterized in that: The transflective film (20) comprises a first film layer portion (1) and a second film layer portion (2) which are stacked, the first film layer portion (1) being located at least on one side of the second film layer portion (2), the first film layer portion (1) comprising a first dielectric layer (101) or a second dielectric layer (102) or first dielectric layers (101) and second dielectric layers (102) which are alternately arranged, the second film layer portion (2) comprising a metal layer (201) and the first dielectric layer (101) and / or the second dielectric layer (102) which are arranged on both sides of the metal layer (201), and the refractive index of the first dielectric layer (101) is not equal to the refractive index of the second dielectric layer (102).

7. The reflector according to claim 1, characterized in that: The first polarized light is P polarized light, the second polarized light is S polarized light, and when the transflective film is within a first incident angle range, within at least half of a wavelength range of 390-780nm, the reflectivity of the transflective film to the first polarized light is greater than or equal to 20%, and the reflectivity to the second polarized light is less than 20%.

8. The reflector according to claim 7, characterized in that: When the transflective film is within the second incident angle range, the reflectivity fluctuation range of the first polarized light within the wavelength range of 390-780nm is less than 30%.

9. The reflector according to claim 7, characterized in that: When the transflective film is within a third incident angle range, the average reflectivity of the first polarized light within a wavelength range of 420-490nm is a first reflectivity, the average reflectivity of the first polarized light within a wavelength range of 500-560nm is a second reflectivity, and the average reflectivity of the first polarized light within a wavelength range of 580-630nm is a third reflectivity, wherein the difference among the first reflectivity, the second reflectivity and the third reflectivity is less than or equal to 10%.

10. The reflector according to claim 6, characterized in that: The refractive index of the first dielectric layer (101) is greater than or equal to 2.0, and the refractive index of the second dielectric layer (102) is less than or equal to 1.7; and / or, The number of the first dielectric layers (101) in the first film layer portion (1) is less than or equal to 10, and the number of the second dielectric layers (102) is less than or equal to 10; and / or, The thickness of the first dielectric layer (101) in the first film layer portion (1) is between 10 nm and 100 nm, and the thickness of the second dielectric layer (102) in the first film layer portion (1) is between 15 nm and 150 nm.

11. The reflector according to claim 6, characterized in that: The metal layer includes at least one of a silver reflective layer, a gold reflective layer, a copper reflective layer and an aluminum reflective layer; and / or the single layer thickness of the metal layer is 1 nm to 50 nm.

12. The reflector according to claim 1, characterized in that: The first antireflection film (30) comprises at least one first unit layer and at least one second unit layer which are alternately arranged, the refractive index of the first unit layer is in the range of 2≤n3≤2.5, and the refractive index of the second unit layer is in the range of 1.2≤n4≤1.7; and / or, The number of the first unit layers is less than or equal to 10, and the number of the second unit layers is less than or equal to 10; and / or, The thickness of the first unit layer is in a range of 10 nm to 150 nm, and the thickness of the second unit layer is in a range of 10 nm to 150 nm; and / or, The material of the first unit layer includes an inorganic metal compound, and the material of the second unit layer includes an inorganic oxide.

13. The reflector according to claim 4, characterized in that: The first protective film (40) is an anti-fingerprint film or a hardening film; and / or, The thickness of the first protective film (40) is less than or equal to 50 nm; and / or, The refractive index of the first protective film (40) is in the range of 1.3 to 1.5; and / or, The ratio of the refractive index of the first antireflection film (30) to the refractive index of the first protective film (40) is greater than or equal to 0.8 and less than or equal to 1.

2.

14. The reflector according to claim 4, characterized in that: The substrate (10) comprises a first glass plate (11), a second glass plate (13) and an intermediate layer (12); the transflective film (20) is arranged on the inner surface of the second glass plate (13); the second glass plate (13) is arranged toward the interior of the vehicle; the first anti-reflective film (30) and the first protective film (40) are arranged in sequence on the outer surface of the first glass plate (11); and / or, The second anti-reflection film (31) and the second protective film (41) are arranged on a side of the transflective film (20) away from the substrate (10), and the second anti-reflection film (31) is arranged between the transflective film (20) and the second protective film (41); and / or, The transflective film (20) is provided between the first glass plate (11) and the intermediate layer (12) or between the second glass plate (13) and the intermediate layer (12); the first antireflective film (30) and / or the first protective film (40) are provided on the outer surface of the first glass plate (11); and / or the second antireflective film (31) and / or the first protective film (41) are provided on the outer surface of the second glass plate (13); and / or, The transflective film (20), the first anti-reflective film (30) and the first protective film (40) are arranged in sequence on the outer surface of the first glass plate (11), and the second anti-reflective film (31) and / or the second protective film (41) are arranged on the inner surface of the second glass plate (13).

15. The reflector according to claim 6, characterized in that: The second film layer portion (2) further comprises a supporting layer (202), wherein the supporting layer (202) is arranged on the metal layer (201) and is located on at least one side of the metal layer (201).

16. The reflector according to claim 1, characterized in that: The total number of layers of the transflective film (20) is less than or equal to 30, and / or the total thickness of the transflective film (20) is between 100 nm and 800 nm.

17. A head-up display system, characterized in that: It comprises a head-up display and a first external reflective element, wherein the first external reflective element is the reflective element according to any one of claims 1-16.

18. A means of transport, characterized in that: Includes the reflector as described in any one of claims 1 to 16; or includes the head-up display system as described in claim 17.

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