CN116061654A

CN116061654A - Windshield, display system and vehicle

Info

Publication number: CN116061654A
Application number: CN202211096293.9A
Authority: CN
Inventors: 朱子爵; 陈彦哲; 常志文
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2022-05-31
Filing date: 2022-05-31
Publication date: 2023-05-05
Also published as: CN117183689A; WO2023231453A1

Abstract

The application discloses a windshield, comprising: the light reflection enhancement film comprises inner layer glass, outer layer glass, a glue-sandwiched layer and a P light reflection enhancement film; wherein, the glue clamping layer is positioned between the inner layer glass and the outer layer glass, and the P light reflection increasing film is plated on the inner layer glass or the outer layer glass. The application also provides a display system and a vehicle. The display system may be a HUD system. In the scheme, because the P light reflection increasing film can improve the reflectivity of P light, the P light can carry an image of one focal plane or one eye in 3D display, so that double-focal plane/multi-focal plane/3D display is realized, and double images cannot be generated.

Description

Windshield, display system and vehicle

This application is a divisional application, the filing number of the original application is 202210612085.3, the filing date of the original application is 2022, month 05, 31, and the entire contents of the original application are incorporated herein by reference.

Technical Field

The application relates to the technical field of optics, in particular to windshield glass, a display system and a vehicle.

Background

Head Up Display (HUD) is matched with a front windshield through an optical system, images sent out by an image generating unit (picture generation unit, PGU) are imaged to human eyes, and a head up display function is achieved.

The current HUD is mainly implemented by projection, wherein projection imaging is to use a front windshield glass or an additionally arranged optical element for projection display, and the most common mode is to directly use reflection of the front windshield glass, but the reflectivity of the windshield glass to P light is lower, that is, the reflectivity of light with a polarization direction parallel to a reflection plane is lower, and the reflectivity is about 0 to 4%.

Most current HUD systems are single focal plane systems, where the dashboard information and navigation information are displayed at the far focal plane simultaneously. When the automobile runs in an urban road scene, instrument panel information easily passes through a near scene, and interference is generated on the sight of a driver.

Disclosure of Invention

The application provides a windshield glass for improving P light reflectivity to realize bifocal/multifocal/3D display. The application also provides a display system and a vehicle.

A first aspect of the present application provides a windscreen comprising: the light reflection enhancement film comprises inner layer glass, outer layer glass, a glue-sandwiched layer and a P light reflection enhancement film; wherein, the glue clamping layer is positioned between the inner layer glass and the outer layer glass, and the P light reflection increasing film is plated on the inner layer glass or the outer layer glass.

In this application, the windscreen may be a front windscreen on a vehicle.

In the application, because the P light reflection increasing film can improve the reflectivity of P light, the P light can carry an image of one focal plane or one eye in 3D display, thereby realizing double-focal plane/multi-focal plane/3D display without generating double images.

In one possible implementation manner of the first aspect, the P-light reflection enhancing film is plated on the outer surface of the inner layer glass or the outer surface of the outer layer glass; the outer surface of the inner layer glass is the surface of the inner layer glass far away from the adhesive layer, and the outer surface of the outer layer glass is the surface of the outer layer glass far away from the adhesive layer.

In this possible implementation manner, the P-ray reflection enhancing film may be coated on the surface of the windshield, so that the reflectivity of the P-ray is increased due to the presence of the P-ray reflection enhancing film during the P-ray transmission, so that the P-ray becomes the light capable of carrying the image.

In one possible implementation manner of the first aspect, the P-light reflection enhancing film is plated on the inner surface of the inner layer glass or the inner surface of the outer layer glass; the inner surface of the inner layer glass is the contact surface of the inner layer glass and the adhesive layer, and the inner surface of the outer layer glass is the contact surface of the outer layer glass and the adhesive layer.

In this possible implementation manner, the P-ray reflection enhancing film may be plated inside the windshield, so that the reflectivity of the P-ray is increased due to the presence of the P-ray reflection enhancing film during the P-ray transmission, so that the P-ray becomes the light capable of carrying the image.

In one possible implementation manner of the first aspect, the reflectivity of the P-light reflection enhancing film to P-light is greater than 10%.

In one possible implementation of the first aspect, the glue line has a wedge-shaped angle.

In one possible implementation of the first aspect, the wedge angle ranges from 0.05 milliradians (mrad) to 0.6mrad.

In a possible implementation manner of the first aspect, the refractive index of the glue-laminated layer is similar to the refractive indices of the inner layer glass and the outer layer glass.

In this possible implementation, the meaning of "close" may be that the refractive index of the glue-laminated layer differs from the refractive index of the inner glass and the outer glass within a certain range, such as: [0,0.5], or the difference between the refractive index of the laminated layer and the refractive index of the inner and outer glass needs to be smaller than a predetermined value, such as: 0.5. such as: the refractive index of the inner glass and the outer glass in the windshield is 1.52, the refractive index of the laminated layer is 1.49, and the difference between the refractive indexes is 0.3. The refractive index of the adhesive layer is similar to that of the inner layer glass and the outer layer glass, so that the reflection times of S light can be reduced, and the probability of ghost images of an image carried by the S light is reduced.

A second aspect of the present application provides a display system comprising: projection equipment and windshield glass, wherein the windshield glass comprises inner layer glass, outer layer glass, a glue clamping layer and a P light reflection increasing film; wherein, the glue-sandwiched layer is positioned between the inner layer glass and the outer layer glass, and the P light reflection increasing film is plated on the inner layer glass or the outer layer glass; the projection device emits first P light to the windshield, and the first P light is reflected by the P light reflection increasing film to emit first image light; the projection device emits a first S light toward the windshield, and the first S light is reflected by the inner and outer glass on a path through the windshield to emit a second image light.

In the present application, the projection device may be an image generation unit (picture generation unit, PGU), or other module having an image generation function. The projection device may emit P light, which refers to light having a light polarization direction perpendicular to the reflection plane, and S light, which refers to light having a light polarization direction parallel to the reflection plane. According to the fresnel reflection principle, the reflectivity of P light incident on the windshield is extremely low, usually only 8% of the P light will be reflected, and the reflectivity of S light incident on the windshield is higher than the reflectivity of P light, usually 20% of the S light will be reflected.

In this application, both the first image light and the second image light may be imaged into the retina of the user or into a test device such as a camera.

In this application, the windscreen may be a front windscreen on a vehicle.

In a possible implementation manner of the second aspect, the refractive index of the glue-laminated layer is similar to the refractive indices of the inner layer glass and the outer layer glass.

In a possible implementation manner of the second aspect, the display system further includes a mirror, and the mirror is configured to receive the first P light and the first S light emitted by the projection device, and reflect the first P light and the first S light to the windshield.

In a possible implementation manner of the second aspect, the reflecting mirror is a curved mirror.

In one possible implementation manner of the second aspect, the glue-clamping layer has a wedge angle, and the P-light reflection enhancing film is plated on the outer surface of the inner layer glass or the outer surface of the outer layer glass; the outer surface of the inner layer glass is the surface of the inner layer glass, which is far away from the glue clamping layer, and the outer surface of the outer layer glass is the surface of the outer layer glass, which is far away from the glue clamping layer; the first S light is reflected once at the P light reflection increasing film, and the outer surface of the inner glass or the outer surface of the outer glass is reflected once to obtain two paths of second image light, wherein the second reflected image light sequentially transmits the adhesive layer and the inner glass.

In this possible implementation, the first P-ray antireflection film may be coated on the surface of the windshield, where the first P-ray is reflected only once by the first P-ray antireflection film, and reflection of the first P-ray at other locations is negligible, so that the first image light generated by reflection of the first P-ray is free from ghost images. The first S light is transmitted from air to the windshield or reflected twice from the windshield to the air, wherein the second reflected image light is transmitted through the laminated layer and the inner layer glass in sequence, the laminated layer with a wedge angle causes the windshield to have a certain wedge angle, and the wedge angle corrects the outgoing angle of the image light transmitted through the laminated layer, so that the reflected light is focused on the same point, thereby eliminating double images of the two reflections. Therefore, no ghost is generated when the display system of this structure performs a double-focus display or a 3D display.

In one possible implementation manner of the second aspect, the adhesive-clamping layer is an adhesive-clamping layer with equal thickness, and the P-light reflection enhancing film is plated on the inner surface of the inner layer glass or the inner surface of the outer layer glass; the inner surface of the inner layer glass is the contact surface of the inner layer glass and the adhesive layer, and the inner surface of the outer layer glass is the contact surface of the outer layer glass and the adhesive layer; the first S light is reflected once on the outer surface of the inner layer glass, is reflected once at the P light reflection increasing film and is reflected once on the outer surface of the outer layer glass, so that three paths of second image light are obtained.

In this possible implementation manner, the P-ray reflection enhancing film may be coated on the surface of the windshield, where the first P-ray is reflected only once by the P-ray reflection enhancing film, and the reflection of the first P-ray at other locations is negligible, so that the first image light generated by the reflection of the first P-ray is free from ghost images. The first S light is reflected three times, and the three reflected paths of second image light can eliminate ghost images by reducing resolution.

In a possible implementation manner of the second aspect, the display resolution of the S-ray image sources of the three second image lights is lower than a preset value, so that the imaging of the three second image lights is connected together.

In this possible implementation manner, there are three second image lights, and two second image lights are ghost images, so that in order to solve the ghost problem of the second image lights with such a structure, the embodiment of the application adopts an image blurring processing manner to eliminate ghost images, the image blurring processing manner refers to reducing the display resolution of the S-light image source, and the display resolution of the S-light image source is adjusted to be lower than a preset value, so that the three second image lights are connected together and displayed in the form of one image light in the human eye. For example: three images can be seen by displaying each image light at a width of 1 micron, and if each image light is displayed at a width of 3 microns, the three image lights are connected together, and a user sees an image of 9 microns or slightly less than 9 microns. In general, an S-ray image is used for displaying a rough image such as navigation information, and even if the resolution is low, the user is not affected by driving.

In a possible implementation manner of the second aspect, the first P light and the first S light carry a left eye image or a right eye image with different parallaxes, respectively.

When the windshield glass comprises the adhesive clamping layer with the wedge-shaped included angle, the first P light and the first S light respectively carry left eye images or right eye images with different parallaxes, and 3D display can be achieved.

In the possible implementation mode, the 3D-HUD system has no problem of crosstalk of an eye box of naked eye 3D-HUD, and the problem that the windshield in the current 3D-HUD system has polarization selection property is solved by plating the P light reflection enhancing film.

In one possible implementation of the second aspect, the wedge angle ranges from 0.05 milliradians (mrad) to 0.6mrad.

In a possible implementation manner of the second aspect, the angle of incidence of the first P light on the windscreen ranges from 50 ° to 70 °.

In a possible implementation manner of the second aspect, the projection device further emits the first P-light and the second P-light toward the windshield; the second P light is reflected by the P light reflection increasing film to form third image light.

In a possible implementation manner of the second aspect, the projection device further emits second S light toward the windshield, and the second S light is reflected by the inner glass and the outer glass to emit fourth image light on a path through the windshield.

In the possible implementation manner, the projection device emits a plurality of P lights or a plurality of S lights, so that the P lights or the S lights can be projected onto a plurality of focal planes, thereby realizing double-image-free multi-focal-plane display.

In one possible implementation manner of the second aspect, the reflectivity of the P-light reflection enhancing film to the first P-light is greater than 10%.

A third aspect of the present application provides a vehicle having mounted thereon a display system according to the second aspect or any one of its possible implementations. The vehicle can be a known vehicle such as an automobile, an airplane, a ship, a rocket, a train and the like, and can also be a new vehicle in the future.

Drawings

FIG. 1 is a schematic diagram of a scenario in which the display system is used in an automobile;

FIG. 2A is a schematic view of a windshield according to an embodiment of the present application;

FIG. 2B is another schematic structural view of a windshield provided in an embodiment of the present application;

FIG. 2C is another schematic structural view of a windshield provided in an embodiment of the present application;

FIG. 2D is another schematic structural view of a windshield provided in an embodiment of the present application;

FIG. 3A is a schematic diagram showing the occurrence of ghost images in the system;

FIG. 3B is a schematic diagram illustrating the ghost elimination of the display system;

Fig. 4A is a schematic diagram of a dual focal plane head-up display according to an embodiment of the present disclosure;

fig. 4B is a schematic diagram of a 3D head-up display according to an embodiment of the present application;

FIG. 5 is a schematic diagram of a display system according to an embodiment of the disclosure;

FIG. 6 is another schematic structural diagram of a display system according to an embodiment of the present disclosure;

FIG. 7 is another schematic structural diagram of a display system according to an embodiment of the present disclosure;

FIG. 8 is another schematic structural diagram of a display system according to an embodiment of the present disclosure;

FIG. 9 is another schematic structural diagram of a display system according to an embodiment of the present disclosure;

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

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

FIG. 12 is a schematic diagram of another structure of a display system according to an embodiment of the disclosure;

fig. 13 is a schematic structural diagram of a vehicle according to an embodiment of the present application.

Detailed Description

Embodiments of the present application will now be described with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some, but not all embodiments of the present application. As a person of ordinary skill in the art can know, with the development of technology and the appearance of new scenes, the technical solutions provided in the embodiments of the present application are applicable to similar technical problems.

The terms first, second and the like in the description and in the claims of the present application and in the above-described figures, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments described herein may be implemented in other sequences than those illustrated or otherwise described herein.

The embodiment of the application provides a windshield glass which is used for improving P light reflectivity so as to realize double-focus surface/multi-focus surface/3D display. The application also provides a display system and a vehicle. The following will describe in detail.

The display system provided in the embodiments of the present application may be a Head Up Display (HUD) system.

HUD system also called head-up display can be applied to the known vehicles such as automobiles, airplanes, ships, rockets, and the like, and can also be new vehicles in the future.

The scene that HUD system used on the car can be understood with reference to fig. 1, and as shown in fig. 1, HUD system cooperates with the windscreen of car through new line display device, and when the image light that new line display device sent out is through windscreen, can be reflected by windscreen, and the image light of reflection can image in the driver's eye and form images, realizes new line display function. The heads-up display device may be an image generation unit (PGU), among others. The windscreen may be a front windscreen of a vehicle.

Shown in fig. 1 is a dual focal plane display HUD system wherein motormeter panel information may be displayed on a first focal plane and navigation information may be displayed on a second focal plane. Of course, the HUD system can display different information through more focal planes, and the current dual-focal-plane or multi-focal-plane HUD system has the problem of double image.

In order to reduce or eliminate double or multiple focal plane ghosting in HUD systems, embodiments of the present application provide a new construction of windshield comprising an inner glass, an outer glass, a laminating layer, and a P-ray reflection enhancing film; wherein, the glue clamping layer is positioned between the inner layer glass and the outer layer glass, and the P light reflection increasing film is plated on the inner layer glass or the outer layer glass.

The P light reflection increasing film can be plated on the outer surface or the inner surface of inner glass, and also can be plated on the outer surface or the inner surface of outer glass, wherein the outer surface of the inner glass is the surface of the inner glass, which is far away from the adhesive layer, and the outer surface of the outer glass is the surface of the outer glass, which is far away from the adhesive layer. The inner surface of the inner layer glass is the contact surface of the inner layer glass and the adhesive layer, and the inner surface of the outer layer glass is the contact surface of the outer layer glass and the adhesive layer.

Next, the structure of the windshield according to the embodiment of the present application will be described with reference to fig. 2A to 2D, and as shown in the block diagrams of the windshield of fig. 2A to 2D, the windshield 20 includes an inner glass 201, an outer glass 202, a laminated layer 203 having a wedge angle, and a P-type light reflection enhancing film 204. In fig. 2A, the P-type light reflection enhancing film 204 is coated on the outer surface of the inner glass 201, in fig. 2B, the P-type light reflection enhancing film 204 is coated on the outer surface of the outer glass 202, in fig. 2C, the P-type light reflection enhancing film 204 is coated on the inner surface of the inner glass 201, and in fig. 2D, the P-type light reflection enhancing film 204 is coated on the inner surface of the outer glass 202.

Although the structures of the windshields described in fig. 2A to 2D are described as being plated with the P-type light reflection enhancing film at one position, in practice, the present application is not limited to these plating positions, and two or more positions may be plated with the P-type light reflection enhancing film at the same time.

In the present embodiments, the wedge angle typically ranges from 0.05 milliradians (mrad) to 0.6mrad.

In the embodiment of the application, because the reflection enhancement film of the P light can improve the reflectivity of the P light, the P light can carry an image of one focal plane or one eye in 3D display, so that double-focal plane/multi-focal plane/3D display is realized, and double images cannot be generated.

In the embodiment of the application, the reflectivity of the P light reflection increasing film to P light is more than 10%.

In the embodiment of the application, the adhesive clamping layer is provided with a wedge angle, and the adhesive clamping layer with the wedge angle can eliminate image double images of S light reflection.

The principle by which double image can be removed with respect to a laminated layer having a wedge angle can be understood with reference to fig. 3A and 3B. When using a non-wedge-shaped laminated layer, as shown in fig. 3A, the windshield is equally thick at each position, and the twice reflected light enters the eye and is focused to different positions of the retina through the lens, so that the eye can see the separation of the twice reflected images, i.e. ghost images appear. When using a wedge-shaped laminated layer, as shown in fig. 3B, the windscreen is provided with a wedge angle, which, because of the correction of the angle of emission of the second reflected light, allows the twice reflected light to enter the eye and to be focused via the lens on the same point of the retina, thus eliminating ghosts.

In the present embodiment, the wedge angle ranges from 0.05 milliradians (mrad) to 0.6mrad.

In the embodiment of the application, the refractive index of the adhesive-clamping layer is similar to the refractive indexes of the inner-layer glass and the outer-layer glass. Wherein, "close" may mean that the refractive index of the laminated layer is within a certain range from the refractive index of the inner glass and the outer glass, such as: [0,0.5], or the difference between the refractive index of the laminated layer and the refractive index of the inner and outer glass needs to be smaller than a predetermined value, such as: 0.5. such as: the refractive index of the inner glass and the outer glass in the windshield is 1.52, the refractive index of the laminated layer is 1.49, and the difference between the refractive indexes is 0.3. The refractive index of the adhesive layer is similar to that of the inner layer glass and the outer layer glass, so that the reflection times of S light can be reduced, and the probability of ghost images of an image carried by the S light is reduced.

The windshield glass provided by the embodiment of the application can be applied to a display system on a vehicle, such as the HUD system introduced above, and comprises a projection device and the windshield glass, wherein the windshield glass comprises inner glass, outer glass, a glue-sandwiched layer and a P light reflection enhancing film; wherein, the glue-sandwiched layer is positioned between the inner layer glass and the outer layer glass, and the P light reflection increasing film is plated on the inner layer glass or the outer layer glass; the projection device emits first P light to the windshield, and the first P light is reflected by the P light reflection increasing film to emit first image light; the projection device emits a first S light toward the windshield, and the first S light is reflected by the inner and outer glass on a path through the windshield to emit a second image light.

In the embodiment of the application, the first image light and the second image light may be imaged into the retina of the user or into a test device such as a camera.

The windscreen can be understood with reference to the structure of fig. 2A to 2D above. The projection device may be a PGU, or other module with image generation functionality. The projection device may emit P light, which refers to light having a light polarization direction perpendicular to the reflection plane, and S light, which refers to light having a light polarization direction parallel to the reflection plane. According to the fresnel reflection principle, the reflectivity of P light incident on the windshield is extremely low, and usually only 8% of the P light will be reflected, and the reflectivity of S light incident on the windshield is higher than that of P light, but also usually only 20% of the S light will be reflected.

In the embodiments of the present application, the incident angle of the P light and the S light on the windshield ranges from 50 ° to 70 °, and further, the incident angle may range from 55 ° to 62 °, which is generally equal to or close to the brewster angle of the windshield. Therefore, the reflectivity of P light on the windshield is extremely low, most of the P light is directly transmitted to the air outside through the windshield, the reflectivity of S light is higher than that of P light when the P light passes through the windshield, and the P light is usually reflected at a position where the refractive index of the medium is greatly changed.

In this application, because the reflection enhancement film can improve the reflectivity to P light, an image of a focal plane can be carried by P light, for example: the image carried by the first P light is projected to a first focal plane, and the image carried by the first S light is projected to a second focal plane, so that double-focal-plane display is realized. Or the first P light and the first S light respectively carry left eye images or right eye images with different parallaxes, so that 3D display is realized. The images carried by the first P-light and the first S-light are each projected to a different focal plane or imaged to a different eye, so that no ghost image is generated.

In the embodiment of the present application, the "focal plane" is virtual, and is not a specific physical device, and refers to a projection position of information seen by a user, whether the first focal plane, the second focal plane, or other focal planes.

The HUD system provided in this embodiment of the present application may be a dual focal plane display, a multi-focal plane display, or a 3D display, where the principle of dual focal plane display may be understood by referring to fig. 4A, and the principle of 3D display may be understood by referring to fig. 4B.

In fig. 4A, focal plane 1 may be understood as a first focal plane, speed information may be displayed on focal plane 1, the focal plane may be understood as a second focal plane, and a navigation arrow indication may be displayed on focal plane 2. The first focal plane may be understood as a near focal plane and the second focal plane may be understood as a far focal plane. Reflected light rays projected onto both focal planes, i.e., the first image light and the second image light, enter the eye, and the user can see the information on both focal planes. The principle of multi-focal-plane display is similar to dual focal planes, except that the HUD module will emit more light beams to project onto the other focal planes.

In fig. 4B, the S light and the P light emitted by the 3D-HUD module are projected to similar positions, so as to generate a polarized 3D image as shown in fig. 4B, if the user wears no 3D glasses, the user sees an image with ghost, after wearing the 3D glasses, the first image light and the second image light can be imaged to the left eye and the right eye respectively, and a clear 3D image can be seen.

The HUD module and the 3D-HUD module are both projection devices.

In this embodiment, the P-ray reflection enhancing film may be located on the inner surface or the outer surface of the windshield, or the P-ray reflection enhancing film may be located between the windshield and the adhesive layer. Several configurations of HUD systems are described below with reference to the accompanying drawings.

The reflection positions of the first P light and the first S light of the HUD system provided in this embodiment of the present application are related to the positions of the P light reflection enhancing film in the windshield, and the HUD system is described below in conjunction with the different positions of the P light reflection enhancing film in the windshield.

1. The P light reflection increasing film is coated on the outer surface of the inner glass.

As shown in fig. 5, the display system includes a projection device 10 and a windshield 20, the windshield 20 including an inner glass 201, an outer glass 202, a laminating layer 203, and a P-ray reflection enhancing film 204. In fig. 5, the P-ray reflection enhancing film 204 is coated on the outer surface of the inner glass 201, and the P-ray reflection enhancing film 204 can be also understood as the inner surface of the windshield. If the display system of the present application is used on an automobile, the inner surface of the windshield is the surface that is in contact with the air in the automobile.

The projection device 10 may emit at least one P-beam and at least one S-beam, where P-beam and S-beam are image light, and in this application, the emitted P-beam of different light may be referred to as a first P-beam, a second P-beam, and the emitted S-beam of different light may be referred to as a first S-beam, a second S-beam.

In the configuration shown in fig. 5, the projection device 10 emits one P light and one S light, which may be referred to herein as first P light and one S light as first S light, for example.

The first P light is reflected at the P light reflection enhancing film 204, and the reflected P light may be referred to as first image light. The first image light may be projected onto a first focal plane and incident on an eye or test device, where the first image light may carry information on a dashboard of the vehicle, such that a user may see the information on the dashboard of the vehicle at the first focal plane.

A part of the S light is reflected for the first time when the first S light is incident on the P-type light reflection enhancing film 204, and a part of the first S light passes through the P-type light reflection enhancing film 204, the inner glass 201, the adhesive layer 203 and the outer glass 202, and is reflected for the second time on the outer surface of the outer glass 202, that is, on the contact surface between the outer glass 202 and the outside air, and the reflected image light is called as the second image light no matter how many times the first S light is reflected. These second image light may be projected onto a second focal plane and incident on the eye or test device, where the second image light may carry navigation information so that the user may see the navigation information at the second focal plane.

In the structure shown in fig. 5, there are two second image lights, and one second image light will be ghost, and in order to solve the ghost problem of the second image light of the structure, the glue-laminated layer 203 has a wedge angle. In the present embodiments, the wedge angle typically ranges from 0.05 milliradians (mrad) to 0.6mrad.

The principle by which double image can be removed with respect to a laminated layer having a wedge angle can be understood with reference to fig. 3A and 3B. When using a non-wedge-shaped laminated layer, as shown in fig. 3A, the windshield is equally thick at each position, and the twice-reflected optical fibers enter the eye and are focused to different positions of the retina through the lens, so that the eye can see the separation of the twice-reflected images, i.e., ghost images. When using a wedge-shaped laminated layer, as shown in fig. 3B, the windscreen is provided with a wedge angle, which, because of the correction of the angle of emission of the second reflected light, allows the twice reflected light to enter the eye and to be focused via the lens on the same point of the retina, thus eliminating ghosts.

2. The P light reflection increasing film is plated on the outer surface of the outer layer glass.

As shown in fig. 6, the display system includes a projection device 10 and a windshield 20, the windshield 20 including an inner glass 201, an outer glass 202, a laminating layer 203, and a P-ray reflection enhancing film 204. In fig. 6, the P-ray reflection enhancing film 204 is coated on the outer surface of the outer glass 202, and the P-ray reflection enhancing film 204 can be also understood as the outer surface of the windshield. If the display system of the present application is used on an automobile, the outer surface of the windshield is the surface that is in contact with the air outside the automobile.

In the configuration shown in fig. 6, the projection device 10 emits one P light and one S light, and the one P light and the one S light are referred to as a first P light and the one S light is referred to as a first S light, respectively.

A part of the S light is reflected for the first time when the first S light is incident on the inner glass 201, and a part of the S light passes through the inner glass 201, the adhesive layer 203, the outer glass 202 and the P light reflection enhancing film 204, and is reflected for the second time at the contact surface of the P light reflection enhancing film 204 and the external air, and the reflected image light is called as the second image light no matter how many times the first S light is reflected. These second image light may be projected onto a second focal plane and incident on the eye or test device, where the second image light may carry navigation information so that the user may see the navigation information at the second focal plane.

In the structure shown in fig. 6, there are two second image lights, and one second image light will be ghost, and in order to solve the ghost problem of the second image light of the structure, the glue-laminated layer 203 has a wedge angle. The principle of eliminating the double image problem of the double reflection of S light with respect to the adhesive tape 203 having a wedge angle can be understood with reference to the previous description of fig. 3A and 3B.

In the embodiment of the present application, when the P-reflection enhancing film is coated on the outer surface of the inner glass layer or the outer surface of the outer glass layer, the material of the P-reflection enhancing film may be at least one of a metal oxide and a non-metal oxide, and the P-reflection enhancing film may have multiple layers, where the refractive index of each layer is different, and the refractive index between the multiple layers is generally alternating, for example: the P-type light reflection increasing film has 6 layers, and the refractive indexes of the first layer to the sixth layer are alternated, such as: the refractive index of the first layer was 2.5, the refractive index of the second layer was 1.2, the refractive index of the third layer was 2.5, the refractive index of the fourth layer was 1.2, the refractive index of the fifth layer was 2.5, and the refractive index of the sixth layer was 1.2. Of course, this is merely illustrative, and does not limit the specific refractive index of each layer, nor the material of each layer. The thickness of the P-ray antireflection film is usually several tens nanometers to several hundreds nanometers.

3. The P light reflection increasing film is coated on the inner surface of the inner glass.

As shown in fig. 7, the display system includes a projection device 10 and a windshield 20, the windshield 20 including an inner glass 201, an outer glass 202, a laminating layer 203, and a P-ray reflection enhancing film 204. In fig. 7, a P-ray reflection enhancing film 204 is plated on the inner surface of the inner glass 201 between the laminated layer 203 and the inner glass 201. The glue line 203 in fig. 7 may be a glue line of equal thickness.

In the configuration shown in fig. 7, the projection device 10 emits one P light and one S light, which may be referred to herein as first P light and one S light as first S light, for example.

The first S light is incident on the inner glass 201, a part of the S light is reflected for the first time, a part of the first S light passes through the inner glass 201, a second reflection occurs at the P-type light reflection increasing film 204, a part of the first S light continues to pass through the P-type light reflection increasing film 204, the glue clamping layer 203 and the outer glass 202, a third reflection occurs at a position where the outer glass 202 contacts with the external air, and no matter how many times the first S light is reflected, the reflected image light is called the second image light. These second image light may be projected onto a second focal plane and incident on the eye or test device, where the second image light may carry navigation information so that the user may see the navigation information at the second focal plane.

In the structure shown in fig. 7, there are three second image lights, and two second image lights are ghost images, so that in order to solve the ghost image problem of the second image light of the structure, the embodiment of the application adopts an image blurring processing mode to eliminate ghost images, the image blurring processing mode refers to reducing the display resolution of the S-light image source, and the display resolution of the S-light image source is adjusted to be lower than a preset value, so that the three second image lights are connected together to be displayed in the human eye in the form of one image light. For example: three images can be seen by displaying each image light at a width of 1 micron, and if each image light is displayed at a width of 3 microns, the three image lights are connected together, and a user sees an image of 9 microns or slightly less than 9 microns. In general, an S-ray image is used for displaying a rough image such as navigation information, and even if the resolution is low, the user is not affected by driving.

4. The P light reflection increasing film is plated on the inner surface of the outer layer glass.

As shown in fig. 8, the display system includes a projection device 10 and a windshield 20, the windshield 20 including an inner glass 201, an outer glass 202, a laminating layer 203, and a P-ray reflection enhancing film 204. In fig. 8, a P-ray reflection enhancing film 204 is plated on the outer layer glass 202 between the laminated layer 203 and the outer layer glass 202, that is, on the inner surface of the outer layer glass 202. The glue line 203 in fig. 8 may be a glue line of equal thickness.

In the configuration shown in fig. 8, the projection device 10 emits one P light and one S light, and the one P light and the one S light are referred to as a first P light and the one S light is referred to as a first S light, respectively.

The first S light is incident on the inner glass 201, a part of the S light is reflected for the first time, a part of the first S light passes through the inner glass 201 and the adhesive layer 203, a second reflection occurs at the P-type light reflection enhancing film 204, a part of the first S light continues to pass through the P-type light reflection enhancing film 204 and the outer glass 202, a third reflection occurs at a position where the outer glass 202 contacts with the external air, and the reflected image light is called as the second image light no matter how many times the first S light is reflected. These second image light may be projected onto a second focal plane and incident on the eye or test device, where the second image light may carry navigation information so that the user may see the navigation information at the second focal plane.

In the structure shown in fig. 8, there are three second image lights, and two second image lights are ghost images, so that in order to solve the ghost image problem of the second image light of the structure, the embodiment of the application adopts an image blurring processing mode to eliminate ghost images, the image blurring processing mode refers to reducing the display resolution of the S-light image source, and the display resolution of the S-light image source is adjusted to be lower than a preset value, so that the three second image lights are connected together to be displayed in the human eye in the form of one image light. For example: three images can be seen by displaying each image light at a width of 1 micron, and if each image light is displayed at a width of 3 microns, the three image lights are connected together, and a user sees an image of 9 microns or slightly less than 9 microns. In general, an S-ray image is used for displaying a rough image such as navigation information, and even if the resolution is low, the user is not affected by driving.

It should be noted that in the embodiments of the present application, the materials of the P-type light reflection enhancing films of the two structures shown in fig. 7 and 8 generally include metal oxides, metals, and non-metal oxides, and the P-type light reflection enhancing film generally includes multiple layers, where the metal layers may be included, and the metal layers are generally located in the middle. The thickness of the P-ray antireflection film is usually several tens nanometers to several hundreds nanometers.

The HUD systems described above are shown in a bifocal format, and the HUD systems provided in embodiments of the present application may also be used for multi-focal display, only by emitting multiple beams of light from the projection device 10.

With the structure of the windshield shown in fig. 5, as shown in fig. 9, the projection apparatus 10 emits two beams of P light and one beam of S light, which may be referred to as first P light, second P light, and first S light, respectively.

A part of the S light is reflected for the first time when the first S light is incident on the P-type light reflection enhancing film 204, and a part of the first S light passes through the P-type light reflection enhancing film 204, the inner glass 201, the adhesive layer 203 and the outer glass 202, and is reflected for the second time at the contact surface between the outer glass 202 and the outside air, and the reflected image light is called as the second image light no matter how many times the first S light is reflected. These second image light may be projected onto a second focal plane and incident on the eye or test device, where the second image light may carry navigation information so that the user may see the navigation information at the second focal plane.

The second P light is reflected at the P light reflection enhancing film 204, and the reflected P light may be referred to as third image light. The third image light can be projected to a third focal plane and is incident to eyes, and the third image light can carry incoming call prompt information of a user mobile phone, information for playing music and the like.

With the structure of the windshield shown in fig. 5, as shown in fig. 10, the projection apparatus 10 emits one beam of P light and two beams of S light, which may be referred to as first P light, first S light, and second S light, respectively.

A part of the second S light is reflected for the first time when entering the P-type light reflection enhancing film 204, and a part of the second S light passes through the P-type light reflection enhancing film 204, the inner glass 201, the adhesive layer 203 and the outer glass 202, and is reflected for the second time at the contact surface between the outer glass 202 and the outside air, and the reflected image light is called as fourth image light no matter how many times the first S light is reflected. The fourth image light can be projected to a fourth focal plane and is incident to eyes or test equipment, and the fourth image light can carry incoming call prompt information of a user mobile phone, information for playing music and the like.

The above description of fig. 9 and 10 is made with reference to the structure of the windshield glass shown in fig. 5, and it should be noted that the multi-focal plane display process can be implemented with other structures of the windshield glass shown in fig. 6 to 8. The multi-focal plane display is not limited to the triple-focal plane display shown in fig. 9 and 10, and the projection device 10 may emit more P-light and S-light to implement the multi-focal plane display, and the reflection principles of P-light and S-light may be understood by referring to the reflection principles of the first P-light, the second P-light, the first S-light and the second S-light.

The windshield structure shown in fig. 5 and 6 in the embodiments of the present application may also be used for 3D image display, and the HUD system for displaying 3D images may be understood with reference to fig. 11 and 12.

As shown in fig. 11, the display system includes a 3D projection device 10 and a windshield 20, the windshield 20 including an inner glass 201, an outer glass 202, a laminating layer 203, and a P-ray reflection enhancing film 204. In fig. 11, the P-ray reflection enhancing film 204 is coated on the outer surface of the inner glass 201, and the P-ray reflection enhancing film 204 can be also understood as the inner surface of the windshield. If the display system of the present application is used on an automobile, the inner surface of the windshield is the surface that is in contact with the air in the automobile.

The 3D projection device 10 may emit a P light and an S light, which may be referred to herein as a first P light and a S light as a first S light. The first P light and the first S light carry left-eye images or right-eye images of different parallaxes, respectively.

The first P light is reflected at the P light reflection enhancing film 204, and the reflected P light may be referred to as first image light. The first image light may be incident on the left eye or the right eye.

A part of the S light is reflected for the first time when the first S light is incident on the P-type light reflection enhancing film 204, and a part of the first S light passes through the P-type light reflection enhancing film 204, the inner glass 201, the adhesive layer 203 and the outer glass 202, and is reflected for the second time at the contact surface between the outer glass 202 and the outside air, and the reflected image light is called as the second image light no matter how many times the first S light is reflected. The second image light may be incident on the right eye or the left eye.

The concept of the first focal plane and the second focal plane is not shown in fig. 11, and if the concept of the first focal plane and the second focal plane is included, the first focal plane and the second focal plane can be considered to be very close, and as can be understood by referring to fig. 4B, if the user does not wear 3D glasses, the user sees a blurred image, and can see a clear image after wearing 3D glasses.

In the structure shown in fig. 11, there are two second image lights, and one second image light will be ghost, and in order to solve the ghost problem of the second image light of the structure, the glue-laminated layer 203 has a wedge angle. In the present embodiments, the wedge angle typically ranges from 0.05 milliradians (mrad) to 0.6mrad.

The principle by which double image can be removed with respect to a laminated layer having a wedge angle can be understood with reference to fig. 3A and 3B.

As shown in fig. 12, the display system includes a 3D projection device 10 and a windshield 20, the windshield 20 including an inner glass 201, an outer glass 202, a laminating layer 203, and a P-ray reflection enhancing film 204. In fig. 12, the P-ray reflection enhancing film 204 is coated on the outer surface of the outer glass 202, and the P-ray reflection enhancing film 204 can be understood as the outer surface of the windshield. If the display system of the present application is used on an automobile, the outer surface of the windshield is the surface that is in contact with the air outside the automobile.

In the structure shown in fig. 12, the 3D projection device 10 may emit one P light and one S light, and one P light may be referred to herein as a first P light and one S light may be referred to herein as a first S light.

The first P light is reflected at the P light reflection enhancing film 204, and the reflected P light may be referred to as first image light. The first P light and the first S light carry left-eye images or right-eye images of different parallaxes, respectively.

A part of the S light is reflected for the first time when the first S light is incident on the inner glass 201, and a part of the S light passes through the inner glass 201, the adhesive layer 203, the outer glass 202 and the P light reflection enhancing film 204, and is reflected for the second time at the contact surface of the P light reflection enhancing film 204 and the external air, and the reflected image light is called as the second image light no matter how many times the first S light is reflected. The second image light may be incident on the right eye or the left eye.

The 3D-HUD system provided by the embodiment of the application has no problem of crosstalk of an eye box of naked eye 3D-HUD, and solves the problem that the windshield in the current 3D-HUD system has polarization selection property by plating the P light reflection enhancing film.

The P light reflection-increasing film of the windshield glass can be realized on the glass through mature processes such as evaporation coating, sputtering coating, pulse laser deposition and the like, the reliability is high, the appearance of the windshield is not affected, and meanwhile, the transmittance of the windshield is ensured.

Referring to fig. 13, fig. 13 is a functional schematic diagram of a vehicle according to an embodiment of the present application.

The vehicle may include various subsystems such as a sensor system 21, a control system 22, one or more peripheral devices 23 (one shown as an example), a power source 24, a computer system 25, and a display system 26, which may communicate with each other. Display system 26 may include a display device provided by embodiments of the present application. The vehicle may also include other functional systems such as an engine system, a cabin, etc. that power the vehicle, as not limited herein.

The sensor system 21 may include a plurality of detecting devices, which can sense the measured information and convert the sensed information into an electrical signal or other information output in a desired form according to a certain rule. As shown in fig. 13, these detection devices may include, but are not limited to, a global positioning system (Global Positioning System, GPS), a vehicle speed sensor, an inertial measurement unit (Inertial Measurement Unit, IMU), a radar unit, a laser rangefinder, an image pickup device, a wheel speed sensor, a steering sensor, a gear sensor, or other elements for automatic detection, and so forth.

The control system 22 may include several elements such as a steering unit, a braking unit, a lighting system, an autopilot system, a map navigation system, a network timing system, and an obstacle avoidance system as shown. The control system 22 may receive information (e.g., vehicle speed, vehicle distance, etc.) sent by the sensor system 21, and may implement functions such as automatic driving, map navigation, etc.

Optionally, control system 22 may also include elements such as throttle controls and engine controls for controlling the speed of travel of the vehicle, as not limited in this application.

Peripheral 23 may include several elements such as a communication system, a touch screen, a user interface, a microphone, and a speaker, among others. Wherein the communication system is used for realizing network communication between the vehicle and other devices except the vehicle. In practical applications, the communication system may employ wireless communication technology or wired communication technology to enable network communication between the vehicle and other devices. The wired communication technology may refer to communication between the vehicle and other devices through a network cable or an optical fiber, etc.

The power source 24 represents a system that provides power or energy to the vehicle, which may include, but is not limited to, a rechargeable lithium battery or lead acid battery, or the like. In practical applications, one or more battery packs in the power supply are used to provide electrical energy or power for vehicle start-up, and the type and materials of the power supply are not limited in this application.

Several functions of the vehicle may be controlled by the computer system 25. The computer system 25 may include one or more processors 2501 (illustrated as one processor) and memory 2502 (which may also be referred to as storage devices). In practical applications, the memory 2502 may be internal to the computer system 25, or external to the computer system 25, for example, as a cache in a vehicle, and the present application is not limited thereto.

The processor 2501 may include one or more general-purpose processors, such as a graphics processor (graphic processing unit, GPU), among others. The processor 2501 is operable to execute programs, or instructions corresponding to programs, stored in the memory 2502 to perform corresponding functions for the vehicle. The processor 2501 may also be referred to as a domain controller.

The memory 2502 may include volatile memory (RAM) such as; the memory may also include a non-volatile memory (non-volatile memory), such as ROM, flash memory (flash memory), HDD, or solid state disk SSD; memory 2502 may also include combinations of the above types of memory. The memory 2502 may be used to store a set of program codes or instructions corresponding to the program codes so that the processor 2501 invokes the program codes or instructions stored in the memory 2502 to implement the corresponding functions of the vehicle. In this application, the memory 2502 may store a set of program codes for vehicle control, which the processor 2501 invokes to control safe driving of the vehicle, as to how safe driving of the vehicle is achieved, as described in detail below.

Alternatively, the memory 2502 may store information such as road maps, driving routes, sensor data, and the like, in addition to program code or instructions. The computer system 25 may implement the relevant functions of the vehicle in combination with other elements in the functional framework schematic of the vehicle, such as sensors in the sensor system, GPS, etc. For example, the computer system 25 may control the traveling direction or traveling speed of the vehicle, etc., based on the data input of the sensor system 21, without limitation of the present application.

The display system 26 may interact with other systems within the vehicle, for example, it may display navigation information sent by the control system 22, or play multimedia content sent by the computer system 25 and the peripheral device 23, etc. The specific structure of the display system 26 refers to the embodiment of the display device described above, and will not be described herein.

The four subsystems shown in the present embodiment are only examples, and the sensor system 21, the control system 22, the computer system 25 and the display system 26 are not limiting. In practical applications, the vehicle may combine several elements in the vehicle according to different functions, thereby obtaining subsystems with corresponding different functions. In actual practice, the vehicle may include more or fewer subsystems or elements, as the application is not limited.

The vehicles in the embodiment of the application can be known vehicles such as automobiles, airplanes, ships, rockets and the like, and can also be new vehicles in the future. The vehicle may be an electric vehicle, a fuel vehicle, or a hybrid vehicle, for example, a pure electric vehicle, an extended range electric vehicle, a hybrid electric vehicle, a fuel cell vehicle, a new energy vehicle, etc., which is not particularly limited in this application.

The display system provided by the embodiment of the application can be applied to various vehicles, and double-focus/multi-focus/3D display without double images can be realized by using the display system described in the previous embodiment no matter what vehicle should be.

The above is merely a specific implementation of the embodiments of the present application, but the protection scope of the embodiments of the present application is not limited thereto.

Claims

1. A windshield glass comprising:

the light reflection enhancement film comprises inner layer glass, outer layer glass, a glue-sandwiched layer and a P light reflection enhancement film;

the P light reflection enhancing film is plated on the inner layer glass or the outer layer glass;

the windshield glass is used for receiving incident first P light, and the first P light is reflected out of first image light by the P light reflection increasing film;

the windshield is also configured to receive incident first S light reflected by the inner and outer panes of glass in a path through the windshield to emit second image light.

2. The windshield of claim 1, wherein the P-ray reflection enhancing film is plated on an outer surface of the inner glass or an outer surface of the outer glass; the outer surface of the inner layer glass is the surface, far away from the adhesive layer, of the inner layer glass, and the outer surface of the outer layer glass is the surface, far away from the adhesive layer, of the outer layer glass.

3. The windshield of claim 1, wherein the P-ray reflection enhancing film is plated on an inner surface of the inner glass or an inner surface of the outer glass; the inner surface of the inner layer glass is the contact surface of the inner layer glass and the adhesive-clamping layer, and the inner surface of the outer layer glass is the contact surface of the outer layer glass and the adhesive-clamping layer.

4. A windscreen according to any of claims 1 to 3 wherein the reflectivity of the P-ray reflection enhancing film to P-ray is greater than 10%.

5. A windscreen according to claim 2, wherein said glue layer has a wedge-shaped angle.

6. A windscreen according to claim 5, wherein the wedge angle ranges from 0.05 milliradians (mrad) to 0.6mrad.

7. A display system, comprising:

the projection device and the windshield comprise inner glass, outer glass, a glue-sandwiched layer and a P light reflection-increasing film; the P light reflection enhancing film is plated on the inner layer glass or the outer layer glass;

The projection device is used for emitting first P light to the windshield glass, and the first P light is reflected by the P light reflection increasing film to emit first image light;

the projection device is configured to emit a first S light toward the windshield, the first S light being reflected by the inner and outer panes of glass in a path through the windshield to emit a second image light.

8. The display system of claim 7, wherein the P-ray reflection enhancing film is plated on an outer surface of the inner glass or an outer surface of the outer glass; the outer surface of the inner layer glass is the surface, far away from the adhesive layer, of the inner layer glass, and the outer surface of the outer layer glass is the surface, far away from the adhesive layer, of the outer layer glass;

the first S light is reflected once at the P light reflection increasing film, and is reflected once at the outer surface of the inner layer glass or the outer surface of the outer layer glass, so that two paths of second image light are obtained, wherein the second reflected second image light sequentially transmits the adhesive layer and the inner layer glass.

9. The display system of claim 7, wherein the glue-sandwiched layer is a glue-sandwiched layer of equal thickness, and the P-light reflection enhancing film is plated on the inner surface of the inner glass or the inner surface of the outer glass; the inner surface of the inner layer glass is the surface of the inner layer glass, which is in contact with the glue-clamping layer, and the inner surface of the outer layer glass is the surface of the outer layer glass, which is in contact with the glue-clamping layer;

The first S light is reflected once on the outer surface of the inner layer glass, is reflected once at the P light reflection increasing film and is reflected once on the outer surface of the outer layer glass, so that three paths of second image light are obtained.

10. The display system of claim 9, wherein the display resolution of the S-ray image sources of the three second image lights is below a preset value.

11. The display system of claim 7, wherein the first P-light and the first S-light carry left-eye images or right-eye images, respectively, of different parallaxes.

12. The display system of claim 8 or 11, wherein the wedge angle ranges from 0.05 milliradians (mrad) to 0.6mrad.

13. A display system according to any one of claims 7-12, wherein the angle of incidence of the first P-light on the windscreen is in the range 50 ° to 70 °.

14. The display system of claim 7 or 8, wherein the projection device further emits a first P-ray out of a second P-ray toward the windshield;

the second P light is reflected by the P light reflection increasing film to obtain third image light.

15. The display system according to claim 7 or 8, wherein the projection device further emits a second S light towards the windshield, the second S light being reflected by the inner glass and the outer glass on a path through the windshield to emit a fourth image light.

16. The display system of any of claims 7-15, wherein the P-ray reflection enhancing film has a reflectivity of greater than 10% for the first P-ray.

17. A vehicle comprising the display system of any one of claims 7-16.