CN114690277B

CN114690277B - Film-coated substrate and display system

Info

Publication number: CN114690277B
Application number: CN202210316332.5A
Authority: CN
Inventors: 顾跃凤
Original assignee: Shanghai AVIC Optoelectronics Co Ltd
Current assignee: Shanghai AVIC Optoelectronics Co Ltd
Priority date: 2020-12-28
Filing date: 2020-12-28
Publication date: 2024-04-02
Anticipated expiration: 2040-12-28
Also published as: CN114690277A; CN112526647B; CN112526647A

Abstract

The invention discloses a coated substrate and a display system, and relates to the technical field of display; the film plating substrate comprises a substrate base plate and optical film components, wherein any optical film component comprises N groups of optical films which are stacked, and any group of optical films comprises a layer of first-type optical film and a layer of second-type optical film; the refractive index of the first type of optical film is smaller than that of the second type of optical film, and the first type of optical film and the second type of optical film are alternately arranged; the refractive index of the first type of optical film in the optical film assembly is gradually increased along the direction away from the substrate, and the refractive index of the second type of optical film is gradually increased or the refractive indexes of the second type of optical film are the same; or, the refractive index of the first type of optical film in the optical film assembly gradually decreases, and the refractive index of the second type of optical film gradually decreases or is the same; the method is beneficial to improving the reflection effect of the coating substrate on the picture and improving the visual experience effect of the user under the condition that the user obtains the external scene through the coating substrate.

Description

Film-coated substrate and display system

The application is divided application with the name of 'coating substrate and display system' for the application with the application number of 202011575884.5 and the application number of 2020, 12 and 28.

Technical Field

The invention relates to the technical field of display, in particular to a coated substrate and a display system.

Background

In the prior art, more and more application scenes are reflected to human eyes from a picture sent by a display device through a base member, corresponding technical requirements are larger and larger, and part of the base member has the effect of transmitting light rays in the prior art so as to realize fusion of external scenes and display pictures. However, when the reflection effect of the base member on the screen is not particularly ideal, the effect of the screen reflected by the base member received by the user to the eyes is not clear enough, and therefore, in order to improve the effect of the display screen reflected by the base member, it is necessary to develop a base member with a novel film structure to avoid the above problems.

Disclosure of Invention

In view of the above, the invention provides a coated substrate and a display system, so that a user can obtain a picture reflected to eyes by the coated substrate with good display effect, and simultaneously, the user can obtain the external scene of the coated substrate, and the visual experience effect of the user is improved.

In a first aspect, the present application provides a coated substrate, including a substrate and at least one optical film assembly located on one side of the substrate, where any one of the optical film assemblies includes at least N groups of optical films stacked together, and any one of the optical films includes a first optical film and a second optical film; the refractive index of the first type of optical film is smaller than that of the second type of optical film, and the first type of optical film and the second type of optical film are alternately arranged; wherein N is more than or equal to 2, and N is a positive integer;

The refractive index of the first type of optical film in at least one optical film assembly is gradually increased along a first direction, and the refractive index of the second type of optical film is gradually increased, or the refractive indexes of the second type of optical film are all the same; or alternatively, the first and second heat exchangers may be,

the refractive index of the first type of optical film in at least one of the optical film assemblies gradually decreases, and the refractive index of the second type of optical film gradually decreases, or the refractive indexes of the second type of optical film are all the same;

wherein the first direction is a direction away from the substrate base plate.

In a second aspect, the present application provides a display system comprising the coated substrate and a display device.

Compared with the prior art, the coated substrate and the display system provided by the invention have the advantages that at least the following effects are realized:

the application provides a film-coated substrate and a display system, wherein the film-coated substrate comprises an optical film assembly arranged on one side of a substrate base plate, the optical film assembly comprises a first type of optical film and a second type of optical film which are alternately arranged, the refractive index of the first type of optical film in the optical film assembly is gradually increased along a first direction, and the refractive indexes of the second type of optical film are gradually increased or are the same; or the refractive index of the first type of optical film in the optical film assembly gradually decreases along the first direction, and the refractive index of the second type of optical film gradually decreases or is the same; the arrangement can also improve the reflection effect of the film coating substrate on the picture and display brightness under the condition that a user obtains the external scene through the film coating substrate, so that the brightness of the backlight can be reduced under the same condition, and the purpose of reducing the power consumption is further achieved.

Of course, it is not necessary for any one product embodying the invention to achieve all of the technical effects described above at the same time.

Other features of the present invention and its advantages will become apparent from the following detailed description of exemplary embodiments of the invention, which proceeds with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.

FIG. 1 is a schematic view of a structure of a coated substrate according to an embodiment of the present disclosure;

FIG. 2 is a schematic view of another structure of a coated substrate according to an embodiment of the present disclosure;

FIG. 3 is a schematic view of another structure of a coated substrate according to an embodiment of the present disclosure;

FIG. 4 is a schematic view of another structure of a coated substrate according to an embodiment of the present disclosure;

FIG. 5 is a schematic view of another structure of FIG. 2 according to an embodiment of the present disclosure;

FIG. 6 is a schematic diagram of another structure of FIG. 3 according to an embodiment of the present disclosure;

FIG. 7 is a schematic diagram of another structure of FIG. 4 according to an embodiment of the present disclosure;

FIG. 8 is a schematic view of another structure of a coated substrate according to an embodiment of the present disclosure;

FIG. 9 is a schematic view of another structure of a coated substrate according to an embodiment of the present disclosure;

FIG. 10 is a schematic diagram of a display system according to an embodiment of the present disclosure;

FIG. 11 is a schematic diagram of a display system according to an embodiment of the present disclosure;

fig. 12 is another schematic diagram of a display system according to an embodiment of the present application:

FIG. 13 is a schematic illustration of a simulation provided by a prior art embodiment;

FIG. 14 is a schematic diagram of simulation provided in an embodiment of the present application;

FIG. 15 is a schematic diagram showing a simulated comparison of light transmittance for the prior art and embodiments of the present application;

FIG. 16 is another schematic illustration of simulation provided by an embodiment of the present application;

FIG. 17 is another schematic diagram of a simulated comparison of light transmittance for the prior art and embodiments of the present application.

Detailed Description

Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless it is specifically stated otherwise.

The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses.

Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate.

In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of exemplary embodiments may have different values.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

The present invention provides a specific embodiment of the prior art, such as a Head Up Display (HUD), which is an integrated electronic Display device applied to an automobile or an airplane, and includes a CHUD (combinenhud) and a WHUD (windshield HUD), wherein when the WHUD is used, information such as navigation information, flight parameters and the like can be projected onto the windshield in front of a driving seat in a form of graphics and characters through optical components, the height of the information is approximately horizontal to eyes of a driver, and when the driver looks forward, external scenes and data displayed on the windshield can be easily fused together, so that the driver always keeps a Head-Up posture, and the delay and discomfort caused by the rapid change of ignoring external environments between the Head-Up and the low Head and the need of continuously adjusting eye focal lengths are reduced. In addition, because sunlight reflects mostly S light on the ground, when a driver watches a picture on the windshield, the S light reflected by the outside of the windshield can cause the driver to feel dazzling, so that the driver wears the light shielding lens when necessary to block most of S light from being emitted to eyes, when the driver wears the light shielding lens, information displayed by the WHOD is projected onto the windshield in front of a driver seat, the windshield reflects the information to eyes of the driver, and the light shielding lens can influence visual experience effect of the driver.

Fig. 1 is a schematic structural diagram of a coated substrate according to an embodiment of the present application, referring to fig. 1, a coated substrate 100 is provided, and includes a substrate 10 and at least one optical film assembly located on one side of the substrate 10, where any optical film assembly at least includes N groups of optical films 20 stacked together, and any group of optical films 20 includes a first type of optical film 21 and a second type of optical film 22; the refractive index of the first type optical film 21 is smaller than that of the second type optical film 22, and the first type optical film 21 and the second type optical film 22 are alternately arranged; wherein N is more than or equal to 2, and N is a positive integer;

in the first direction, the refractive index of the first type optical film 21 in the at least one optical film assembly gradually increases, and the refractive index of the second type optical film 22 gradually increases, or the refractive indexes of the second type optical films 22 are all the same; or alternatively, the first and second heat exchangers may be,

The refractive index of the first type optical film 21 in at least one optical film assembly gradually decreases, and the refractive index of the second type optical film 22 gradually decreases, or the refractive indexes of the second type optical films 22 are all the same;

wherein the first direction is a direction away from the substrate base plate 10.

Specifically, the present application provides a coated substrate 100, where the coated substrate 100 includes a substrate 10 and at least one optical film assembly located on one side of the substrate 10, and any one optical film assembly includes at least two groups of optical films 20 stacked together, each group of optical films 20 includes a layer of a first type of optical film 21 and a layer of a second type of optical film 22 stacked together, that is, no other structure is included between the layer of the first type of optical film 21 and the layer of the second type of optical film 22 in each group of optical films 20; wherein, in one optical film assembly, the refractive index of any one of the first type optical films 21 is smaller than the refractive index of any one of the second type optical films 22, and the first type optical films 21 and the second type optical films 22 are alternately arranged in any one of the optical film assemblies. It should be noted that, the application is not limited to the first type of optical film 21 and the second type of optical film 22 that are stacked, and may be, for example, the first layer of the optical film assembly stacked on one side of the substrate 10 is the first type of optical film 21 (fig. 1), or the first layer of the optical film assembly stacked on one side of the substrate 10 is the second type of optical film 22, which is not limited specifically herein, and the user may perform corresponding adjustment according to the design requirement, so long as it is ensured that any optical film assembly includes multiple groups of the first type of optical film 21 and the second type of optical film 22 that are stacked.

The first direction is a direction away from the substrate 10, and the arrangement mode of the optical films 20 in the optical film assemblies is that the refractive index of the first type optical film 21 in at least one optical film assembly is gradually increased, the refractive index of the second type optical film 22 is gradually increased, or the refractive indexes of the second type optical films 22 are the same along the first direction; the present application also provides another way to arrange the optical films 20 in the optical film assemblies, in which the refractive index of the first type of optical film 21 in at least one optical film assembly gradually decreases along the first direction, and the refractive index of the second type of optical film 22 gradually decreases, or the refractive indexes of the second type of optical film 22 are all the same.

According to the optical film assembly, the first type optical film 21 and the second type optical film 22 which are graded in refractive index and different in refractive index and are alternately arranged are arranged on the substrate 10, and through the arrangement of the optical film assembly, the reflection effect of the film coating substrate 100 on a picture can be improved under the condition that a user obtains the outside scene through the film coating substrate 100, the display brightness is improved, so that the brightness of backlight can be reduced under the same condition, and the purpose of reducing power consumption is achieved.

Fig. 2 is a schematic structural diagram of a coated substrate according to an embodiment of the present application, and referring to fig. 2, optionally, two optical film assemblies stacked on one side of the substrate 10 are included, where the first optical film assembly 30 is disposed between the second optical film assembly 40 and the substrate 10.

Specifically, the coated substrate 100 provided in the present application may also be as shown in fig. 2, and includes two optical film assemblies disposed on one side of the substrate 10, where the first optical film assembly 30 may be disposed between the second optical film assembly 40 and the substrate 10; the film structures of the first optical film assembly 30 and the second optical film assembly 40 may be the same (as shown in fig. 2), or the film structures of the first optical film assembly 30 and the second optical film assembly 40 may be different. That is, the optical thin film element having a graded refractive index is provided on the substrate 10 side, so that the effect of the coated substrate 100 on reflecting the screen can be improved, the backlight brightness can be reduced, and the duty ratio of the P-polarized light transmitted through the light shielding lens can be improved.

In addition, each of the optical film groups 20 in any one of the optical film assemblies provided in the present application is formed of the first type optical film 21 and the second type optical film 22, so to speak, each of the optical film groups 20 is formed of one low refractive index optical film (the first type optical film 21) and one high refractive index optical film (the second type optical film 22), and each of the optical film groups is formed of one film structure with alternating high and low refractive indexes to form a gradient refractive index, and at the same time, an interference phase expansion effect is formed, so that the coated substrate 100 has a combination effect of multilayer interference and gradient refractive index.

It should be noted that, whether the arrangement of the film structures in the optical film assemblies is the same is not particularly limited, as long as each optical film assembly includes the first type optical film 21 and the second type optical film 22 alternately arranged, and the refractive index of the first type optical film 21 is gradually increased, the refractive index of the second type optical film 22 is gradually increased or the refractive indexes of the first type optical film 21 and the second type optical film 22 are gradually decreased or the refractive indexes of the second type optical film 22 are the same.

As shown in fig. 2, the present application provides an optical film 20 disposed in a manner that a first optical film assembly 30 and a second optical film assembly 40 stacked on one side of a substrate 10 have the same film layer arrangement structure, specifically, first optical film assemblies 30 are coated with first optical films 21 and second optical films 22 alternately disposed on one side of the substrate 10, wherein the first optical films 21 are located between the second optical films 22 and the substrate 10; similarly, in the second optical film assembly 40, the first type of optical film 21 and the second type of optical film 22 are alternately coated on the side of the first optical film assembly 30 away from the substrate 10, wherein the first type of optical film 21 is located between the second type of optical film 22 and the first optical film assembly 30. The present application also provides an alternative case in which the second optical film assembly 40 is identical to the first optical film assembly 30, i.e., the film layer structure of the optical film 20 in this embodiment is periodically arranged.

It should be noted that, the optical film 20 in the embodiment of fig. 1 and 2 is disposed on the outer surface side of the substrate 10.

Referring to fig. 1 and 2, optionally, in any of the optical film assemblies, the first group of optical films 1 is directed to the nth group of optical films N and stacked in sequence along the first direction.

Specifically, fig. 1 shows a diagram in which a first group of optical films 1, a second group of optical films 2, a third group of optical films 3, and up to an nth group of optical films N are sequentially stacked on one side of the outer surface of a substrate 10; in the case that one of the film-coated substrates 100 shown in fig. 2 includes the first optical film assembly 30 and the second optical film assembly 40 that are periodically arranged, in any one of the optical film assemblies, the first group of optical films 1 may be stacked in order toward the nth group of optical films N, that is, the first group of optical films 1 in one of the optical film assemblies is disposed immediately adjacent to one side of the substrate 10, and then the second group of optical films 2 and the third group of optical films 3 … … nth group of optical films N are disposed in order on one side of the first group of optical films 1 away from the substrate 10; thereby realizing that the first type optical film 21 and the second type optical film 22 which are alternately arranged are included in any one of the optical film assemblies, and the refractive index of the first type optical film 21 can be gradually increased, the refractive index of the second type optical film 22 can be gradually increased or the same. In this embodiment, the optical films 20 are disposed on the outer surface side of the substrate 10.

The optical film component is arranged on one side of the substrate 10 in the arrangement mode, so that the coated substrate 100 with the refractive index gradient effect is formed, the coated substrate 100 has a good effect of reflecting a picture under the condition that a user obtains an external scene through the coated substrate, and the picture display brightness can be improved, so that the coated substrate 100 has the good effects of reducing backlight brightness and reducing power consumption under the same condition.

Referring to fig. 1 and 2, optionally, the first type of optical film 21 in any one of the optical films 20 is located on the side of the second type of optical film 22 near the substrate 10.

Specifically, as shown in fig. 1 and 2, when the optical films 20 are all disposed on one side of the outer surface of the substrate 10 and any one of the optical film assemblies disposed on one side of the substrate 10 is a first group of optical films 1 directed to an nth group of optical films N and stacked in sequence, the first group of optical films 1 disposed on the side adjacent to the substrate 10 is disposed, and the first group of optical films 21 disposed on the side of the second group of optical films 22 adjacent to the substrate 10; that is, the first optical film 21 is first formed on one side of the substrate 10, and the second optical film 22 is formed on one side of the first optical film 21 away from the substrate 10, wherein the refractive index of the first optical film 21 is smaller than that of the second optical film 22; accordingly, in the coated substrate 100 provided in the present application, the distance between the low refractive index optical film (the first type optical film 21) included in each group of optical films 20 and the substrate base 10 is set smaller than the distance between the high refractive index optical film (the second type optical film 22) included in the same group of optical films 20 and the substrate base 10.

By arranging the first type optical film 21 (low refractive index optical film) and the second type optical film 22 (high refractive index optical film) alternately in sequence on one side of the substrate base 10, and by carrying out the specific arrangement of the optical films 20 in the optical film assembly, a film layer structure with graded refractive index is formed, and meanwhile, the effect of interference phase expansion is formed, namely, the film-coated substrate 100 has the comprehensive effect of multilayer interference and graded refractive index.

Fig. 3 is a schematic diagram of another structure of a coated substrate according to an embodiment of the present application, referring to fig. 3, optionally, in a first optical film assembly 30, a first group of optical films 1 is directed to an nth group of optical films N, which are stacked in sequence along a first direction; and in the second optical film assembly 40, the nth group of optical films N are stacked in order toward the first group of optical films 1.

Specifically, when the coated substrate 100 includes two optical film assemblies and the first optical film assembly 30 is located between the second optical film assembly 40 and the substrate 10, the arrangement of the film structures in the first optical film assembly 30 and the second optical film assembly 40 may be symmetrical, specifically, the first group of optical films 1 in the first optical film assembly 30 is first disposed on one side of the substrate 10, and then the second group of optical films 2, the third group of optical films 3 … … and the nth group of optical films N are sequentially disposed on one side of the first group of optical films 1 away from the substrate 10; the first group 1 of N-th, N-1-th, N-2-nd optical films N-2 … … of the second optical film unit 40 is then disposed on the side of the first optical film unit 30 remote from the substrate 10. It should be noted that, in this embodiment, the optical films 20 are disposed on the outer surface side of the substrate 10.

As shown in fig. 3, the present application can further improve the effects of multilayer interference and refractive index gradient of the coated substrate 100 by providing two optical film assemblies (the first optical film assembly 30 and the second optical film assembly 40) symmetrically arranged to form the coated substrate 100 on one side of the substrate 10; under the condition that a user obtains the external scene through the device, the reflective effect of the film coating substrate 100 on the picture can be improved, and the display brightness of the picture can be improved, so that the device has the good functions of reducing the backlight brightness and the power consumption under the same conditions.

The arrangement of the symmetrically arranged optical films 20 shown in fig. 3 provided in the present application is an optional arrangement of optical film assemblies provided in the present application, but the present application is not limited thereto; and the present application is not limited to the substrate 10 side only including one first optical film assembly 30 and one second optical film assembly 40 as shown in fig. 3, for example, one side of the substrate 10 may be alternately provided with the above-described symmetrically arranged sets of first optical film assemblies 30 and second optical film assemblies 40.

As shown in fig. 3, optionally, in the first optical film assembly 30, the second optical film 22 of any one group of optical films 20 is located on the side of the first optical film 21 near the substrate 10; in the second optical film assembly 40, the first type of optical film 21 in any one of the sets of optical films 20 is positioned on the side of the second type of optical film 22 adjacent to the substrate 10.

Specifically, when the coated substrate 100 includes the first optical film assembly 30 and the second optical film assembly 40 that are symmetrically disposed, that is, the first optical film assembly 30 includes the first group of optical films 1 pointing to the nth group of optical films N stacked in sequence, and the second optical film assembly 40 includes the second group of optical films N pointing to the first group of optical films 1 stacked in sequence, the present application provides an optical film 20 disposed in the following manner: in the first optical film assembly 30, the second optical film 22 in any group of optical films 20 is located on the side of the first optical film 21 close to the substrate 10, and in the second optical film assembly 40, the first optical film 21 in any group of optical films 20 is located on the side of the second optical film 22 close to the substrate 10, wherein the refractive index of the first optical film 21 is smaller than that of the second optical film 22; that is, in the first optical film assembly 30, the optical films 20 are arranged in such a manner that the second type optical films 22 (high refractive index optical films) and the first type optical films 21 (low refractive index optical films) are alternately arranged in order, and the refractive indexes of the second type optical films 22 in the first optical film assembly 30 are sequentially increased or always the same along the side far from the substrate 10, and the refractive indexes of the first type optical films 21 are sequentially increased; in the second optical film assembly 40, the optical films 20 are arranged in such a manner that the first type optical films 21 (low refractive index optical films) and the second type optical films 22 (high refractive index optical films) are alternately arranged in sequence, and the refractive index of the first type optical films 21 in the second optical film assembly 40 is sequentially reduced or the refractive index of the second type optical films 22 is sequentially reduced or always the same along the direction of the first optical film assembly 30 away from the substrate 10.

The coated substrate 100 shown in fig. 3 provided in this application includes two optical film assemblies symmetrically arranged, and is mainly used for making a layer of optical film 20 farthest from the substrate 10 in the optical film assemblies be a high refractive index optical film 20, so as to ensure that the coated substrate 100 has an effect of improving good reflection on a picture.

It should be noted that, in order to better show the specific structure of the two optical film assemblies symmetrically arranged, in fig. 3, the first optical film 21 on the side of the first optical film assembly 30 adjacent to the second optical film assembly 40 and the first optical film 21 on the side of the second optical film assembly 40 adjacent to the first optical film assembly 30 are both shown, but in the actual manufacturing process of the coated substrate 100, only one layer of the two first optical films 21 shown here may be actually manufactured.

Fig. 4 is a schematic diagram of another structure of a coated substrate according to an embodiment of the present application, and referring to fig. 4, optionally, a second type of optical film 22 in any group of optical films 20 is located on a side of the first type of optical film 21 near the substrate 10.

Specifically, in addition to the foregoing arrangement of the optical films 20 and the substrate 10 in the optical film assembly shown in fig. 1-3, the present application also provides an arrangement of the optical films 20 in which, in any group of optical films 20, the second type of optical film 22 is located on the side of the first type of optical film 21 near the substrate 10. At this time, specifically as shown in fig. 4, the optical films 20 are disposed on the inner surface side of the substrate 10, and the optical films 20 are arranged in such a manner that, on the inner surface of the substrate 10, the second type optical films 22 (high refractive index optical films) and the first type optical films 21 (low refractive index optical films) are alternately disposed in sequence, and the refractive indexes of the second type optical films 22 are sequentially reduced or always the same along the direction away from the side of the substrate 10 (the first direction shown in fig. 4), and the refractive indexes of the first type optical films 21 are sequentially reduced. In other words, the refractive index of the first type optical film 21 is gradually increased in order, and the refractive index of the second type optical film 22 is gradually increased in order or is always the same in the opposite direction indicated by the first direction arrow in fig. 4.

Similarly, the coated substrate 100 with graded refractive index is also provided to have a good effect of improving reflection of the picture and improving visual experience of the user.

Fig. 5 is a schematic diagram of another structure of fig. 2 provided in an embodiment of the present application, fig. 6 is a schematic diagram of another structure of fig. 3 provided in an embodiment of the present application, fig. 7 is a schematic diagram of another structure of fig. 4 provided in an embodiment of the present application, please refer to fig. 5-7, alternatively, when the coated substrate 100 provided in the present application is applied to a HUD, the present application provides an embodiment that the coated substrate further includes a glass substrate 50 disposed opposite to the substrate 10, and the glass substrate 50 may be disposed on a side of the substrate 10 away from the optical film assembly; specifically, when the first optical film assembly 30 and the second optical film assembly 40, which are arranged periodically as shown in fig. 5, for example, are disposed on the outer surface side of the substrate 10, the glass substrate 50 is disposed on the side of the substrate 10 away from the optical film assemblies; when the first optical film assembly 30 and the second optical film assembly 40, which are symmetrically arranged as shown in fig. 6, are disposed on the outer surface side of the substrate 10, the glass substrate 50 is disposed on the side of the substrate 10 away from the optical film assemblies; for example, as shown in fig. 7, when the optical film assembly is disposed on the inner surface side of the substrate base plate 10, the glass base plate 50 is disposed on the side of the substrate base plate 10 away from the optical film assembly.

In addition, a glue layer 60 is included, and in the above-mentioned fig. 5-7, for example, the glue layer 60 is disposed between the substrate 10 and the glass substrate 50. It should be noted that, when the glass substrate 10 and the adhesive layer 60 are added to the coated substrate 10 shown in fig. 1, the film structure shown in fig. 5 may be provided, that is, the adhesive layer 60 and the glass substrate 50 are sequentially disposed on the side of the substrate 10 away from the optical film assembly.

The coated substrate 100 including the glass substrate 50 and the adhesive layer 60 corresponds to a windshield that can be directly applied to HUD, wherein the substrate 10 in the coated substrate 100 is used as a coated substrate glass; the combination of the glass substrate 50, the adhesive layer 60 and the substrate 10 is equivalent to a laminated glass structure, when the laminated glass is impacted, fragments cannot fly out, the middle interlayer is adhered by the adhesive, and even if the glass is broken, the glass is still connected together under the action of the adhesive, so that the safety of drivers and passengers is guaranteed.

In addition to the embodiment shown in fig. 5-7, fig. 8 is a schematic structural diagram of another embodiment of the coated substrate provided in the embodiment of the present application, and fig. 9 is a schematic structural diagram of another embodiment of the coated substrate provided in the embodiment of the present application, referring to fig. 8 and 9, the coated substrate 100 further includes a glass substrate 50 disposed opposite to the substrate 10, where the glass substrate 50 may be disposed on a side of the optical thin film component away from the substrate 10; specifically, for example, as shown in fig. 8, when the optical film assembly is disposed on the inner surface side of the substrate base plate 10, the glass base plate 50 may be disposed on the side of the optical film assembly away from the substrate base plate 10; for example, as shown in fig. 9, when the optical film assembly is disposed on the outer surface side of the substrate 10, the glass substrate 50 may be disposed on the side of the optical film assembly away from the substrate 10; in general, in the case shown in fig. 8, 9, i.e., the optical film assembly is disposed between the base substrate 10 and the glass substrate 50; at this time, the coated substrate 100 further includes a glue layer 60, and the glue layer 60 is disposed between the optical film assembly and the glass substrate 50.

It should be added that the refractive index of the glass substrate 50 and the substrate 10 is 1.45-1.55, alternatively, at the above refractive index, the glass substrate 50 and the substrate 10 may be made of glass, and the glass substrate 50 and the substrate 10, and the adhesive layer 60 belong to the necessary film layers of the coated substrate 100, and the definition of the refractive index depends on the materials thereof. The refractive index of the glass substrate 50 and the refractive index of the substrate 10 are 1.45-1.55, and the effect of refracting light can be well realized on the premise that the glass substrate 50 and the substrate 10 are made of transparent materials. The thickness of the glass substrate 50 and the thickness of the substrate 10 are both 0.5mm-5mm, which does not cause the overall thickness of the coated substrate 100 to be too large, and can also realize the functions of the glass substrate 50 and the substrate 10.

The material of the adhesive layer 60 may be any one of polyvinyl butyral (PVB), an ionic intermediate film (SGP), an ethylene-vinyl acetate copolymer (EVA) or a high-molecular polyurethane composition (PU), and the above materials may be used as an interlayer material of the coated substrate 100, and have advantages of good transparency, strong impact force, and the like. The application further provides an adhesive layer 60, wherein the thickness of the adhesive layer 60 is controlled to be difficult to achieve in the range of 0.1 mm-2 mm, and the thickness of the adhesive layer 60 smaller than 0.1 mm is controlled to be difficult to achieve, and the adhesive layer 60 larger than 2 mm can cause the thickness of the whole coated substrate 100 to be increased.

It should be noted that, in the specific use, the coated substrate 100 provided in any one of fig. 5 to fig. 9 may be used as a windshield in a head-up display, for example, the information such as navigation information and flight parameters is projected onto the windshield (coated glass) in front of the driving position in the form of graphics and characters through an optical component, the height is approximately horizontal to the eyes of the driver, and when the driver looks forward, the external scene and the data displayed on the windshield (coated glass) can be easily fused together, so that the driver always maintains the head-up posture, the rapid change of the external environment between the head-up and the low head is ignored, and the delay and discomfort caused by the continuous adjustment of the eyes are reduced; in addition, when the driver wears the shutter glasses, the windshield (coated glass) increases the duty ratio of the P-polarized light transmitted through the shutter glasses, and the light transmitted through the shutter glasses is more and has stronger brightness, so that the driver can well acquire the information reflected by the coated substrate 100, and the visual experience effect of the driver is improved.

As shown in FIG. 1, optionally, coated substrate 100 includes M groups of optical films 20, 2.ltoreq.M.ltoreq.10, where M is a positive integer.

Specifically, the present application provides a coated substrate 100 comprising optical films 20 having a number of groups optionally ranging from 2 to 10 groups; if the number of the optical films 20 is greater than 10, the thickness of the coated substrate 100 will be too large, which will reduce the light transmission effect of the coated substrate 100 to some extent, for example, when the optical film is used as a windshield of a HUD, the clarity of the driver looking through the coated substrate 100 for external conditions will be reduced; if the number of groups of the optical films 20 is smaller than 2, the combined effect of the multilayer interference and the refractive index gradient cannot be obtained, and the effect of improving the reflection effect of the coated substrate 100 on the screen cannot be satisfactorily achieved, and the effect of improving the duty ratio of the P-polarized light transmitted through the driver shutter glass cannot be satisfactorily achieved when used as a windshield of a HUD, for example.

Therefore, the number of the groups of the optical films 20 in the film-coated substrate 100 is set between 2-10 groups, which is favorable for better improving the reflection effect of the film-coated substrate 100 on the picture and improving the display brightness, so that the brightness of the backlight can be reduced under the same condition, and the purpose of reducing the power consumption is achieved; and for example, when the coated substrate 100 is used as a windshield of a HUD, when a driver wears the shutter glasses, the arrangement of the optical films 20 of the 2-10 groups improves the duty ratio of P polarized light passing through the shutter glasses, so that more light passes through the shutter glasses and the brightness is stronger, thereby the driver can well acquire information reflected by the coated substrate 100 and the visual experience effect of the driver is improved.

It should be noted that, the number of groups of the optical films 20 included in the coated substrate 100 is not limited by 2-10 groups, and the user can adjust accordingly according to actual requirements. The present application also provides herein that the number of groups of optical films 20 included in the coated substrate 100 may alternatively range from 3 to 7 groups. It should be noted that the ranges of groups 2 to 10 and groups 3 to 7 include the end points.

As shown in fig. 1-9, the first type of optical film 21 may alternatively have a refractive index in the range of 1.45-1.8 and the second type of optical film 22 may have a refractive index in the range of 1.8-4.

Specifically, the first type of optical film 21 provided in the present application is a low refractive index optical film, the second type of optical film 22 is a high refractive index optical film, and the first type of optical film 21 is provided herein with a selectable refractive index in the range of 1.45-1.8, and the second type of optical film 22 is provided herein with a selectable refractive index in the range of 1.8-4. It should be noted that the ranges from 1.45 to 1.8 and from 1.8 to 4 include the endpoints.

It should be noted that, the refractive index ranges 1.45-1.8 and 1.8-4 provided above are only a range of values of the refractive index of the first type optical film 21 and the second type optical film 22 that are coated when the coated substrate 100 is manufactured, and the first type optical film 21 and the second type optical film 22 that are coated on one side of the substrate 10 and stacked alternately generally ensure that the refractive index of any one layer of the first type optical film 21 is smaller than that of any layer of the second type optical film 22, and at the same time, the refractive index of the first type optical film 21 in one optical film assembly is gradually increased along the first direction, and the refractive index of the second type optical film 22 is gradually increased or is the same; alternatively, it is also necessary to have a characteristic in which the refractive index of the first type optical film 21 in one optical film assembly gradually decreases and the refractive index of the second type optical film 22 gradually decreases or is the same in the first direction; therefore, under the condition that a user can acquire an external scene through the film coating substrate 100, the reflection effect of the film coating substrate 100 on a picture is improved, the display brightness is improved, the brightness of backlight can be reduced under the same condition, and the purpose of reducing power consumption is achieved.

Here, it should be noted that, when the number of the first type optical film 21 and the second type optical film 22 to be disposed in the coated substrate 100 is not limited, for example, when the number of the first type optical film 21 and the second type optical film 22 to be disposed is extremely large, it is also permissible that there is a case where the refractive index of the first type optical film 21 disposed at least partially at the distal end located away from the outside of the substrate 10 is equal to or larger than the refractive index of the second type optical film 22 disposed at the proximal end located away from the outside of the substrate 10, but the refractive index of the first type optical film 21 needs to be in a gradually increasing trend in the direction away from the substrate 10, and the refractive index of the corresponding second type optical film 22 is gradually increased or is always not uniform.

It should be noted that, on the basis of the above description, the thickness of the film layer corresponding to the first type optical film 21 is also provided to be 1-1000nm, if the thickness of the first type optical film 21 is less than 1nm, it is very difficult to realize the manufacturing, and if the thickness of the first type optical film 21 is greater than 1000nm, the thickness of the whole film-coated substrate 100 is too large, and the light-transmitting effect of the film-coated substrate 100 is also affected to a certain extent; a first type of optical film 21 is also provided having a thickness in the range of 1-500nm, and where conditions permit, a thickness in the range of 1-200nm is also selected. The thickness of the film layer corresponding to the second type optical film 22 can be selected to be 1-1000nm, if the thickness of the second type optical film 22 is smaller than 1nm, the manufacturing is very difficult to realize, and if the thickness of the second type optical film 22 is larger than 1000nm, the thickness of the whole film coating substrate 100 is too large, and the light transmission effect of the film coating substrate 100 can be influenced to a certain extent. It should be noted that the ranges of 1 to 1000nm, 1 to 500nm, and 1 to 200nm include the end points.

It should be noted that, the refractive index of any one of the first type optical films 21 included in the same coated substrate 100 needs to be smaller than the refractive index of any one of the second type optical films 22 included in the same coated substrate 100, so that the refractive index of the first type optical film 21 in the same coated substrate 100 is smaller than the refractive index of the second type optical film 22; by the arrangement, the effects of multilayer interference and refractive index gradual change formed by the optical film component are better, and the reflection effect of the film-coated substrate 100 on the picture is improved; when the coated substrate 100 is used as a windshield of a HUD, the P-polarized light duty ratio of the light shielding lens worn by a driver can be increased, so that the visual experience effect of the driver is better.

It should be noted that the first type optical film 21 and the second type optical filmThe film 22 may be at least one of niobium pentoxide, titanium dioxide, silicon oxynitride, hafnium dioxide, zirconium dioxide, and tantalum pentoxide, so long as the refractive index of the first type optical film 21 is smaller than that of the second type optical film 22. More specifically, when silicon oxynitride SiO _x N _y As the high refractive index material, the low refractive index material is typically silicon oxide SiO ₂ MgF of magnesium fluoride ₂ A material having an isorefractive index of 1.5 or less; when silicon oxynitride SiO _x N _y As the low refractive index material, the high refractive index material is typically silicon nitride SiN _x Dinitrile pentoxide Nb ₂ O ₅ Titanium dioxide TiO ₂ A material having an isorefractive index of 1.8 or more. The present application is not limited to the alternative embodiments provided herein, and the user may make corresponding adjustments according to actual needs.

Fig. 10 is a schematic diagram of a display system according to an embodiment of the present application, please refer to fig. 10 on the basis of fig. 1-9, and further provides a display system 200 according to the same inventive concept, wherein the system 200 includes the foregoing plating substrate 100 and a display device. Specifically, the coated substrate 100 is the coated substrate 100 provided in any of the above embodiments of the present application, and the repetition is not repeated. It should be noted that, in fig. 10, only the coated substrate 100 shown in fig. 1 is taken as an embodiment, specifically, the display system 200 includes the coated substrate 100 and the display device 210, and the display device 210 is used for emitting a display screen to the surface of the coated substrate 100, and specifically, is shown as emitting the display screen to the outer surface side of the substrate board 10; through the arrangement of the optical film components with alternately laminated refractive indexes and graded refractive indexes in the film coating substrate 100, under the condition that a user obtains external scenes through the film coating substrate, the reflection effect of the film coating substrate 100 on pictures can be improved, and the display brightness of the pictures can be improved, so that the brightness of backlight can be reduced under the same condition, and the purpose of reducing power consumption is further achieved.

Fig. 11 is another schematic diagram of a display system according to an embodiment of the present application, please refer to fig. 11 based on fig. 1-9, and in addition, when the coated substrate 100 is applied to a HUD, the coated substrate 100 provided in the present application may be: any perspective window with a head-up display function such as a windshield for an automobile, a military aircraft windshield and the like.

The display device may include: the display panel 220 and at least one reflector 230, the light emitted by the display panel 220 is transmitted to the coated substrate 100 through the reflector 230. In order to implement the above technology, the display system 200 in this embodiment is provided, so that a driver can see important information required for driving without lowering his head, that is, the important information in the display device is projected onto a windshield in front of the driver, and the display device further includes at least one mirror 230, and the display device further includes a display panel 220, where light emitted by the display panel 220 is transmitted to the coating substrate 100 through the mirror 230, so as to implement projection of the important information in the display panel 220 onto the coating substrate 100, so that the driver can conveniently view the picture information in the driving process.

Fig. 12 is another schematic view of a display system according to an embodiment of the present application, referring to fig. 10 and 12 based on fig. 1-9, alternatively, the display device is located on a side of the optical film assembly away from the substrate 10, or the display device is located on a side of the substrate 10 away from the optical film assembly;

The display device comprises a first group of optical films 1 to an Mth group of optical films M which are sequentially arranged along the direction of a film coating substrate 100 towards the display device, wherein the distance between the display device and the first type of optical film 21 in the Mth group of optical films M is D1, and the distance between the display device and the second type of optical film 22 in the Mth group of optical films M is D2, wherein D1 is more than D2; m is more than or equal to 2 and less than or equal to 10, and M is a positive integer.

Specifically, the display device 210 shown in fig. 10 and 12 is used for emitting a display screen to the coated substrate 100 for display, where the "outer surface of the substrate 10" is a surface of the substrate 10 near the display device 210, and the "inner surface of the substrate 10" is a surface of the substrate 10 far from the display device 210. Correspondingly, in the display system 200 provided in the present application, as shown in fig. 10, the display device 210 is located on a side of the optical thin film assembly away from the substrate 10, or as shown in fig. 12, the display device 210 is located on a side of the substrate 10 away from the optical thin film assembly.

For example, as shown in fig. 1, 2, and 3, when the coated substrate 100 includes the substrate 10 and the optical film assembly sequentially disposed along the first direction, the display device 210 is disposed on a side of the optical film assembly away from the substrate 10, where a layer of the optical film assembly closest to the display device 210 is a second type of optical film 22 (high refractive index optical film), that is, a direction along the coated substrate 100 toward the display device 210, including the first group of optical films 1 to M group of optical films M sequentially disposed, a distance between the display device 210 and the first type of optical film 21 in the M group of optical films M is D1, and a distance between the display device 210 and the second type of optical film 22 in the M group of optical films M is D2, where D1 > D2.

For example, when the coated substrate 100 includes the optical film assembly and the substrate 10 disposed from bottom to top in the drawing, as shown in fig. 12, the display device 210 is located on the side of the substrate 10 away from the optical film assembly, where the film closest to the display device 210 in the optical film assembly is the second type optical film 22 (high refractive index optical film), that is, the first group optical film 1 to the M group optical film M disposed in sequence along the direction of the coated substrate 100 toward the display device 210, the distance between the display device 210 and the first type optical film 21 in the M group optical film M is D1, and the distance between the display device 210 and the second type optical film 22 in the M group optical film M is D2, where D1 > D2.

Furthermore, when the coated substrate 100 is used as a windshield of a HUD, the specific film structure of the coated substrate 100 is shown in fig. 5, 6 and 9, and the coated substrate 100 and the display device 210 are specifically disposed in the manner shown in fig. 10, in which the optical film assembly is disposed between the display device 210 and the substrate 10, the adhesive layer 60 and the glass substrate 50. For example, as shown in fig. 8, when the coated substrate 100 includes the substrate 10, the optical film assembly, the adhesive layer 60, and the glass substrate 50 sequentially disposed, the display device may be disposed on a side of the optical film assembly away from the substrate 10 (not shown), where a layer of the optical film assembly closest to the display device is the second type of optical film 22 (high refractive index optical film), that is, a direction along the coated substrate 100 toward the display device (opposite to the first direction in fig. 8), including the first group of optical films 1 to the M group of optical films M sequentially disposed, a distance between the display device and the first type of optical film 21 in the M group of optical films M is D1, and a distance between the display device and the second type of optical film 22 in the M group of optical films M is D2, where D1 > D2.

For example, as shown in fig. 7, when the coated substrate 100 includes an optical film assembly, a substrate 10, a glue layer 60, and a glass substrate 50 sequentially disposed, in one embodiment, the display device is disposed on a side of the substrate 10 away from the optical film assembly, where a layer of the optical film assembly closest to the display device is a second type of optical film 22 (high refractive index optical film), that is, a direction along the coated substrate 100 toward the display device includes a first group of optical films 1 to an M group of optical films M sequentially disposed, a distance between the display device and the first type of optical film 21 in the M group of optical films M is D1, and a distance between the display device and the second type of optical film 22 in the M group of optical films M is D2, where D1 > D2.

In summary, no matter what the arrangement relation among the optical film assembly, the substrate base plate 10 and the display device is in the film coating substrate 100 provided by the application, a layer of film closest to the display device in the optical film assembly needs to be the second type of optical film 22 (high refractive index optical film), which is beneficial to ensuring that the optical film assembly improves the reflection effect of the film coating substrate 100 on the picture under the condition that a user obtains the external scene through the film coating substrate 100, and can improve the display brightness, so that the brightness of backlight can be reduced under the same condition, and the purpose of reducing the power consumption is further achieved; furthermore, no matter what the positional relation among the optical film assembly, the substrate 10, the adhesive layer 60 and the glass substrate 50 in the coated substrate 100 provided in the present application is, it is required to set a layer of film closest to the display device in the optical film assembly as the second type of optical film 22 (high refractive index optical film), so that a driver using a light shielding lens can be ensured to obtain information reflected by the coated substrate 100, and the visual experience effect of the driver is improved.

Referring to fig. 10, 11 or 12, alternatively, the angle between the outgoing light of the display device and the surface of the coated substrate 100 is θ, which is 30 ° or more and 60 ° or less.

Specifically, the included angle between the emergent light of the display device and the surface of the coated substrate 100 is 30-60 degrees, so that the light can be obliquely incident into the coated substrate 100, and enough S-polarized light and enough P-polarized light can exist in the reflected light, so that a driver using a light shielding lens can obtain information reflected by the coated substrate 100, and the visual experience effect of the driver is improved.

It should be noted that, the present application does not limit the degree of the included angle between the outgoing light of the display device and the surface of the coated substrate 100 in the above range, and the user may adjust accordingly according to the actual requirement. Here, the present application also provides a range of 40 ° to 50 ° that can be selected for the angle between the outgoing light of the display device and the surface of the coated substrate 100. It should be noted that the above range of 40 ° to 50 ° includes the end values.

It should be further noted that, the "included angle between the outgoing light of the display device and the surface of the coated substrate 100" described herein is specifically the included angle between the light finally emitted to the coated substrate 100 and the coated substrate 100 shown in fig. 10-12.

It should be further noted that, except fig. 11, the coated substrates 100 in the remaining drawings of the present application are all shown in a planar structure, but in practical application, for example, in application to automotive glass or aircraft glass, the glass is entirely free-form, and the corresponding coated substrates 100 are also corresponding free-form surfaces. Here, since the number of film layers of the plating substrate in the remaining figures is plotted comparatively more except fig. 11, the specific detailed structure thereof is shown only in a planar structure and is not intended to limit the plating substrate to a planar structure.

Fig. 13 is a schematic diagram of simulation provided by the embodiment of the prior art, fig. 14 is a schematic diagram of simulation provided by the embodiment of the present application, please refer to fig. 13 and 14, in which an angle between an outgoing light ray of a display device and a surface of a glass substrate is 45 ° in the prior art, and it should be noted that the glass substrate in the prior art does not include an optical thin film assembly. At this time, the overall reflectance of the glass substrate is 9.54% without the optical film assembly, in which the S-polarized light contributes 8.65%, the P-polarized light accounts for only 0.89%, and the P-polarized light accounts for only 9.33% of the overall reflected light, and if the HUD is worn with a shutter, the image brightness of the HUD will be directly lost by more than 90%, thus requiring an increase in the P-polarized light duty ratio. As shown in fig. 14, the overall reflectivity of the coated substrate with the optical film assembly provided in the application is 10.2%, wherein the contribution of S polarized light is 7.48%, the P polarized light is 2.72%, and the proportion of P polarized light in the overall reflected light is increased to 27%, which is 3 times higher than the original proportion.

Fig. 15 is a schematic diagram showing simulation comparison of light transmittance in the prior art and the embodiment of the present application, referring to fig. 15, under the original structure without coating, that is, in the prior art, the overall transmittance of the glass substrate is 92.03%, the overall transmittance of the coated substrate after coating in the present application is 89.81%, the relative variation is only 2.4%, and it can be seen that the higher transmittance can be maintained while the P-polarized light duty ratio is improved after coating in the present application.

Fig. 16 is another schematic diagram of simulation provided in the embodiment of the present application, referring to fig. 16, in the case of the plating film of the present application, the overall reflectivity of the plated film substrate is 19.58%, in which the S polarized light contribution is 12.26%, the P polarized light accounts for 7.32%, the proportion of the P polarized light that accounts for the overall reflected light is increased to 37.4%, and is increased by 4 times compared with the original preemption ratio; when the overall reflectivity is improved, the backlight power can be relatively reduced, and the energy saving purpose is achieved. Therefore, by adjusting parameters such as film thickness, the overall reflectivity can be improved, and the high duty ratio of the P polarized light can be maintained.

Fig. 17 is another schematic diagram of simulation comparison of light transmittance in the prior art and the embodiment of the present application, referring to fig. 17, the overall transmittance of the original structure without the film is 92.03%, and the overall transmittance after film coating is 80.06%, and it can be seen that under the same incidence condition, the P polarized light duty ratio is improved after film coating, and meanwhile, the higher transmittance can be maintained.

According to the embodiment, the coated substrate and the display system provided by the invention have the following beneficial effects:

While certain specific embodiments of the invention have been described in detail by way of example, it will be appreciated by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims

1. The film plating substrate is characterized by comprising a substrate base plate and at least one optical film assembly positioned on one side of the substrate base plate, wherein any optical film assembly at least comprises N groups of optical films which are stacked, and any group of optical films comprises a layer of first-type optical film and a layer of second-type optical film; the refractive index of the first type of optical film is smaller than that of the second type of optical film, and the first type of optical film and the second type of optical film are alternately arranged; wherein N is more than or equal to 2, and N is a positive integer;

the refractive indexes of all the first type optical films of the N groups of optical films are gradually increased along the first direction, and the refractive indexes of all the second type optical films are the same; or alternatively, the first and second heat exchangers may be,

the refractive indexes of all the first type optical films of the N groups of optical films are gradually reduced, and the refractive indexes of all the second type optical films are the same;

wherein the first direction is a direction away from the substrate base plate;

the film-coated substrate comprises M groups of optical films, M is more than or equal to 2 and less than or equal to 10, and M is a positive integer.

2. The coated substrate of claim 1, comprising stacking two of the optical film assemblies disposed on one side of the substrate, a first of the optical film assemblies disposed between a second of the optical film assemblies and the substrate.

3. The coated substrate of claim 2, wherein in any one of the optical film assemblies in the first direction, a first group of the optical films is directed to an nth group of the optical films in a stacked arrangement.

4. A coated substrate according to claim 3 wherein the first type of optical film in any one of the sets of optical films is located on a side of the second type of optical film adjacent to the substrate.

5. The coated substrate of claim 2, wherein in a first one of the optical film assemblies, a first group of the optical films is directed to an nth group of the optical films in a stacked order along the first direction; and in the second optical film assembly, the N group of optical films are directed to the first group of optical films to be sequentially stacked.

6. The coated substrate of claim 5 wherein the second type of optical film in any of the plurality of optical films in the first one of the optical film assemblies is positioned on a side of the first type of optical film adjacent to the substrate; in the second optical film assembly, the first optical film in any group of optical films is positioned on one side of the second optical film close to the substrate.

7. The coated substrate of claim 1 wherein the second type of optical film in any of the plurality of optical films is positioned on a side of the first type of optical film adjacent to the substrate.

8. The coated substrate of claim 1 wherein the first type of optical film has a refractive index in the range of 1.45-1.8 and the second type of optical film has a refractive index in the range of 1.8-4.

9. A display system comprising the coated substrate of any one of claims 1-8 and a display device.

10. The display system of claim 9, wherein the display device is located on a side of the optical film assembly remote from the substrate or the display device is located on a side of the substrate remote from the optical film assembly;

the display device comprises a first group of optical films and an Mth group of optical films which are sequentially arranged along the direction of the coating substrate to the display device, wherein the distance between the display device and the first type of optical film in the Mth group of optical films is D1, and the distance between the display device and the second type of optical film in the Mth group of optical films is D2, wherein D1 is more than D2; m is more than or equal to 2 and less than or equal to 10, and M is a positive integer.

11. The display system of claim 9, wherein an angle between an outgoing light ray of the display device and the coated substrate surface is θ, and θ is 30 ° or less and 60 ° or less.

12. A heads-up display comprising: a display device, a mirror, a windshield, wherein the windshield comprises the coated substrate of any of claims 1-8.